Delta Electronics Patente

An axial flux motor stator structure includes magnetic poles and magnetic field action areas, each magnetic field action area including level-positions arranged axially along a rotation axis, and conductors forming a multi-phase winding. Each conductor, after passing through a lowest level-position of the level-positions, ascends to a higher level-position of the level-positions each time each conductor is routed to a next one of the magnetic field action areas corresponding to a next one of the magnetic poles, until each conductor ascends through a highest level-position of the level-positions. Or each conductor, after passing through a highest level-position of the level-positions, descends to a lower level-position of the level-positions each time each conductor is routed to a next one of the magnetic field action areas corresponding to a next one of the magnetic poles, until each conductor descends through a lowest level-position of the level-positions.

The power device (1) includes power module (2, 2a, 2b, 2c, 2d, 2e). Each power module (2, 2a, 2b, 2c, 2d, 2e) includes a substrate (3), a chip (4), metal pillars (5), a molding material (6) and current pins. The substrate (3) includes a metal surface (31). The chip (4) is disposed on the metal surface (31). The metal pillars (5) are disposed on the metal surface (31) along a normal direction of the substrate (3). The molding material (6) covers the substrate (3), the chip (4) and the metal pillars (5). The lateral surface (53) of each metal pillar (5) is totally covered by the molding material (6). The top surface (51) of each metal pillar (5) is exposed from a surface of the molding material (6). The first terminal (711) of the current pin (71) of each power module (2, 2a, 2b, 2c, 2d, 2e) is disposed on the top surface (51) of corresponding metal pillar (5) by welding or sintering. The second terminal (712) of corresponding current pin (71) of corresponding power module (2, 2a, 2b, 2c, 2d, 2e) is disposed on the top surface (51) of corresponding metal pillar (5) of another power module (2, 2a, 2b, 2c, 2d, 2e) by welding or sintering.

The present disclosure provides an inductive power supply (1, 1a, 1b) and an object detection method thereof. A resonant signal is generated when the resonant capacitor (30, 30a) resonates with the power supply coil (20). A voltage detector (32) receives the resonant signal and converts it into a detection signal. A processor (4) obtains a resonant cycle of the resonant signal according to the detection signal. After the driving unit (31, 31a) drives the power supply coil (20), the resonant capacitor (30, 30a) resonates with the power supply coil (20), and a timer of the processor (4) starts timing. When the resonant cycle exceeds a cycle threshold, the timer stops timing. The processor (4) calculates and obtains a measurement of time length according to an interval between the start time and the stop time of the timer. When the measurement of time length is less than a preset time length, the processor (4) determines that there is an object within the power transmission range of the power supply module (2).

The present disclosure provides a socket assembly (100, 200, 300). The socket assembly (100, 200, 300) includes a socket (1) and a power supply expansion component (2). The socket (1) includes a first housing (11) and a first terminal group (13). The first terminal group (13) is disposed on the first housing (11) and electrically coupled with a power source. The power supply expansion component (2) includes a second housing (21), a second terminal group (23) and a power transmission unit (22). The second terminal group (23) is disposed on the second housing (21) and electrically coupled with the power transmission unit (22). When the first housing (11) is assembled with the second housing (21), the first terminal group (13) and the second terminal group (23) are contacted to establish electrical conduction, and the power source supplies electric energy to the power transmission unit (22) through a transmission path formed by the first terminal group (13) and the second terminal group (23).

A stator assembly (100) includes a core member (108), a bracket assembly (103), a first winding assembly (106) and a second winding assembly (110). The core member (108) has a first groove (1081) and a second groove (1082). The bracket assembly (103) includes a first fixed bracket (104) and a second fixed bracket (105). The first fixed bracket (104) is disposed on a first side (SS1) of the core member (108) and has a first engaging structure (1041) that engages with the first groove (1081). The second fixed bracket (105) is disposed on a second side (SS2) of the core member (108) and has a second engaging structure (1051) that engages with the second groove (1082). The first winding assembly (106) is wound around a third side (SS3) of the core member (108). The second winding assembly (110) is wound around a fourth side (SS4) of the core member (108). The first winding assembly (106) and the second winding assembly (110) are arranged along a first axis (AX1).

A transformer module includes a primary side assembly, a secondary side assembly and a magnetic element. The primary side assembly has a first cover body, a first pillar body and a first coil. The first pillar body is connected to the first cover body. The first coil is wound on the first pillar body. The secondary side assembly has a second cover body, a second pillar body and a second coil. The second pillar body is connected to the second cover body. The second coil is wound on the second pillar body. The magnetic element is disposed between the primary side assembly and the secondary side assembly. The first pillar body is fixedly connected to the second pillar body, and the size of the first pillar body is larger than the size of the second pillar body.

A chassis device (9, 9a) is disclosed and includes an accommodation space (8, 8a), a chassis unit (1, 1a), a sliding component (2, 2a), a positioning component (3) and a handle component (4). The sliding component (2, 2a) is disposed between the accommodation space (8, 8a) and the chassis unit (1, 1a) along the first direction. The positioning component (3) is arranged in the accommodation space (8, 8a). The chassis unit (1, 1a) includes a guiding groove (11) arranged along the first direction and spatially corresponding to the positioning component (3). When the chassis unit (1, 1a) is placed into the accommodation space (8, 8a) along the first direction, the positioning component (3) is limited to the guiding groove (11). The handle component (4) is pivotally mounted on the chassis unit (1, 1a) and includes a hook end (41) and a holding end (42). When the handle component (4) is in a first position, the hook end (41), the guiding groove (11) and the positioning component (3) are aligned, allowing the hook end (41) engaging the positioning component (3) and driving the handle component (4) to rotate to a second position.

A motor preheating system (1) and a control method are provided. The driving circuit (35) provides a direct current by the switch (351) to control the motor (2). The motor temperature control unit (31) performs an outer-loop control and includes a switch temperature limiter (313). The motor temperature control unit (31) generates a maximum switch temperature command (T5) according to a comparison result between a motor temperature feedback signal (T2) of the motor (2) and a motor temperature command (T1). The switch temperature control unit (32) performs a first inner-loop control and includes a current limiter (323). The switch temperature control unit (32) generates a maximum current command (T9) according to the maximum switch temperature command (T5) and a maximum switch temperature (T6) of the driving circuit (35). The current control unit (33) performs a second inner-loop control to control the driving circuit (35) according to the maximum current command (T9), so that the motor (2) is controlled. The maximum current command (T9) is a continuous output current.

A voltage compensation system (1, 1a) and an uninterruptible power supply (1, 1a) are provided. The voltage conversion device (3) selectively receives the first AC input source (AC1) or the second AC input source (AC2) through the first switching device (2), and converts the first AC input source (AC1) or the second AC input source (AC2) into a DC voltage (V1). The energy buffering device (8) is connected with the DC busbar (4). The energy buffering device (8) includes a bidirectional voltage conversion device (82) and an energy tank (81). One terminal of the bidirectional voltage conversion device (82) is connected with the DC busbar (4). The energy tank (81) is connected with the other terminal of the bidirectional voltage conversion device (82). During a dead time of the first switching device (2) switching between the first AC input source (AC1) and the second AC input source (AC2), the controller (9) controls the bidirectional voltage conversion device (82), so that the DC voltage (V1) is compensated by the energy tank (81).

A system includes a maximum power point (MPP) tracker (101) coupled between a first solar panel string (112) and a DC voltage bus (Vdc), wherein the MPP tracker (101) includes a first DC/DC converter (114) and is configured to perform a maximum power point tracking (MPPT) control scheme on the first DC/DC converter (114), a power reservoir (102) coupled between a second solar panel string (122) and the DC voltage bus (Vdc), wherein the power reservoir (102) includes a second DC/DC converter (124), and an inverter (154) coupled between the DC voltage bus (Vdc) and a power grid (154), wherein the inverter is configured to operate in multiple modes including a grid-forming (GFM) mode and a grid-following (GFL) mode, and wherein in the GFM mode, the second DC/DC converter (124) is configured to regulate a voltage on the DC voltage bus (Vdc).

An electrical connector assembly includes a first connector, a second connector, an outer ring, and at least one elastic potential energy element. The first connector has a positioning recess. The positioning recess has a guiding inclined surface and a positioning end portion. The second connector is configured to couple with the first connector. The outer ring surrounds the first connector and the second connector, and an edge of the outer ring adjacent to the first connector has a positioning protruding point. The elastic potential energy element is located between the second connector and the outer ring, and is configured to provide an elastic recovery force after the positioning protruding point enters the positioning recess along the guiding inclined surface, such that the positioning protruding point abuts against the positioning end portion.

A power supply includes an AC-DC converter, a feedback circuit, an under voltage protection circuit, a control signal generating circuit, a voltage abnormal protection circuit and an auxiliary under voltage detection circuit. The AC-DC converter converts an AC voltage to a DC voltage. The feedback circuit generates a feedback signal according to the DC voltage. The control signal generating circuit sets the AC-DC converter to convert the AC voltage to the DC voltage. When the auxiliary under voltage detection circuit detects that a duration of the AC voltage being less than a predetermined voltage is longer than a predetermined period, the auxiliary under voltage detection circuit changes a signal value of the feedback signal, to enable the control signal generating circuit by the voltage abnormal detection circuit to set the AC-DC converter to perform a soft start procedure.

A silicon steel sheet stacking structure includes a main silicon steel lamination, a blocking silicon steel sheet, and a riveting blocking portion. The main silicon steel lamination includes silicon steel sheets stacking in a first direction. Each of the silicon steel sheets has at least one through hole. The blocking silicon steel sheet is disposed on the main silicon steel lamination. The blocking silicon steel sheet has at least one through hole. The riveting blocking portion is extended from the blocking silicon steel sheet and is raised above a surface of the blocking silicon steel sheet. The riveting blocking portion is configured to be compressed and generate a deformation, such that the riveting blocking portion pushes at least one magnet located in the at least one accommodating space to abut the at least one magnet against an inner surface of the at least one through hole.

A charging adapter includes an adapter main body, as well as a first latch, a second latch and a synchronizing mechanism disposed on the adapter main body. The adapter main body includes a first electrical connector and a second electrical connector. The first and second electrical connectors are disposed on two opposite ends of the adapter main body and are configured to be connected to a first and a second external connector, respectively. The first latch includes a button and an engaging structure. The engaging structure is connected to the button and is configured to fixedly engage the first external connector. The second latch is configured to fixedly engage the second external connector. The synchronizing mechanism is connected to the first and second latches. The first and second latches are configured to fixedly engage and disengage the first and second external connectors synchronously via the synchronizing mechanism.

An integrated magnetic component and a manufacturing method thereof for a multi-module DC-DC converter (1) are provided. The integrated magnetic component includes N primary windings (Wp1, Wp2), N secondary windings (Wsl, Ws2) and N magnetic cores (21, 22), and N is an integer greater than one. The N magnetic cores (21, 22) are arranged sequentially, and each magnetic core includes a plate (20), first and second common core legs (CCL), an inductor core leg (PICL, SICL) and a transformer core leg (TCL). The first common core leg and the second common core leg are disposed at a first side (201) and a second side (202) of the plate (20) respectively. The inductor core leg (PICL, SICL) is configured to be wound with a corresponding primary or secondary winding, and the transformer core leg (TCL) is configured to be wound with the corresponding primary and secondary windings interleaved with each other.

A hybrid modular multilevel converter (1) is provided. After the voltage difference (ΔV) is added to the original voltage (V_CHB,i) of each half-bridge submodule (311a, 321a, 331a, 312a, 322a, 332a) or the original voltage (V_CFB,j) of each full-bridge submodule (311b, 321b, 331b, 312b, 322b, 332b), a compensation voltage (V' _CHB,i) is obtained. According to a bridge arm current (i_arm) and a voltage reference value (Varm*), signals of one type of submodules with the compensation voltage (V' _CHB,i) and signals of the other type of submodules with the original voltages (V_CHB,i, V_CFB,j) are sorted. Consequently, an operating sequence of the plurality of half-bridge submodules (311a, 321a, 331a, 312a, 322a, 332a) and the plurality of full-bridge submodules (311b, 321b, 331b, 312b, 322b, 332b) is acquired. The operating modes of the half-bridge submodules (311a, 321a, 331a, 312a, 322a, 332a) and the full-bridge submodules (311b, 321b, 331b, 312b, 322b, 332b) are calculated according to the original voltages (V_CHB,i) of the half-bridge submodules (311a, 321a, 331a, 312a, 322a, 332a), the original voltages (V_CFB,j) of the full-bridge submodules (311b, 321b, 331b, 312b, 322b, 332b), the voltage reference value (Varm*) and the operating sequence. A corresponding driving signal is generated to control the half-bridge submodules (311a, 321a, 331a, 312a, 322a, 332a) and the full-bridge submodules (311b, 321b, 331b, 312b, 322b, 332b). Consequently, the voltage difference (ΔV) gradually approaches or equals to 0.

The present disclosure relates to a magnetic component (1, 1a, 1b, 1c, 1d, 1c, 1f, 1g, 1h, 1i, 1j, 1k, 9, 10, 10a, 10b,10c, 81, 9a, 9b, 9c) and an integrated magnetic assembly (8, 8a, 8b, 8c). The magnetic component (1, 1a, 1b, 1c, 1d, 1e, 1f, 1g, 1h, 1i, 1j, 1k, 9, 10, 10a, 10b,10c, 81, 9a, 9b, 9c) includes a magnetic core set (2), a primary winding (3), a first secondary winding (4), a second secondary winding (5) and a tertiary winding (6). The magnetic core set (2) includes a central column (21), a first and a second lateral column (22, 23). The first lateral column (22) includes a first leg (221) and a second leg (222). The second lateral column (23) includes a third leg (231) and a fourth leg (232). A first segment (61) of the tertiary winding (6) is wound on one of the first leg (221) and the second leg (222), and a second segment (62) of the tertiary winding (6) is wound on one of the third leg (231) and the fourth leg (232). The two lateral columns (22, 23) are divided into two legs (221, 222, 231, 232) respectively to achieve partial coupling through the tertiary winding (6). Consequently, the advantages of adjustable and enhanced coupling coefficient, reduced loss, saving footprint and enhanced performance are achieved.

An axial flux motor stator structure (100) includes an outer ring-shaped bracket (110), an inner ring-shaped bracket (120), a stator core (130), an upper winding assembly, a lower winding assembly, an upper thin plate (160) and a lower thin plate (170). The stator core is between the inner ring-shaped bracket and the outer ring-shaped bracket and has plural upper and lower stator slots. The upper winding assembly (140) and the lower winding assembly (150) pass through the upper and lower stator slots respectively. Each of the upper thin plate and the lower thin plate includes an outer axial structure, an inner axial structure and a radial structure. The radial structure is between the upper and the lower winding assemblies.

A power conversion apparatus (10, 10-1, 10-2, 10-3) includes a plurality of three-phase power modules (11-1N), a switch matrix (20), and a controller (30). Each three-phase power module (11-1N) includes three single-phase AC-to-DC conversion units (111, 112, 113) respectively receiving three AC voltages (V_R, V_S, V_T) of a three-phase AC power supply (V_AC3), and converting the three AC voltages (V_R, V_S, V_T) to provide a plurality of DC currents (i_dc1, i_dc2, i_dc3, ..., i_dcN). The switch matrix (20) receives the DC currents (i_dc1, i_dc2, i_dc3, ..., i_dcN) provided from the three-phase power modules (11-1N). The controller (30) provides a switch control signal to control the switch matrix (20) to decide an output power provided by the DC currents (i_dc1, i_dc2, i_dc3, ..., i_dcN).

A detection method for a drive (1) is provided. Firstly, a step (S1) is performed to determine whether an operating parameter of the drive (1) is normal. If the determining condition of the step (S1) is satisfied, a step (S2) is performed to determine whether a value of the abnormal flag is 1. If the determining condition of the step (S2) is satisfied, the soft-start circuit is disabled. If the determining condition of the step (S1) or the step (S2) is not satisfied, the soft-start circuit (3) is enabled to turn on the switch (8) and then the capacitor (C) is pre-charged in a predetermined period. If a pre-charged voltage of the capacitor (C) is greater than a voltage threshold, the drive (1) enters a standby mode. If the pre-charged voltage of the capacitor (C) is not greater than the voltage threshold, the switch (8) is turned off.

A control method for cooling distribution units (CDUs) is disclosed. The control method is applied to a CDU control system having a group at least including a first CDU (81) and a second CDU (82), and includes the following steps: detecting the second CDU (82) of a resting state; sending a low rotation-speed command to the first CDU (81) and the second CDU (82) to indicate both of the first and second CDUs (81, 82) to operate at a second rotation speed, wherein the second rotation speed is slower than a first rotation speed at which the first CDU (81) currently operated; and, when determining both of the first and second CDUs (81, 82) to be operating at the second rotation speed for a preset time length, sending a target flow command to the first CDU (81) and the second CDU (82) to indicate both of the first and second CDUs (81, 82) to operate and output a target flow of cooling liquid.

An integrated magnetic component (1, 1a, 1b, 1c, 1d, 1e, 1f) is disclosed and includes a plurality of PCBs (4, 4a, 4b), a transformer (T) and a plurality of inductors (3, 3a, 3b, 3c, 3d, 3e, 3f). The transformer (T) includes a plurality of primary windings (21), a plurality of secondary windings (22), and two pieces of transformer cores (23). The primary windings (21) and the secondary windings (22) are disposed on the PCBs (4, 4a, 4b) and wound around the two pieces of transformer cores (23). The inductors (3, 3a, 3b, 3c, 3d, 3e, 3f) are disposed on the PCBs (4, 4a, 4b) and connected to the transformer (T). The primary windings (21) and the secondary windings (22) of the transformer (T) are disposed correspondingly in pairs on one of the PCBs (4, 4a, 4b), and the inductors (3, 3a, 3b, 3c, 3d, 3e, 3f) are disposed adjacent to the transformer (T).

A DC-DC power supply (1, 1a) and control method thereof are provided. The DC-DC power supply (1, 1a) includes a transformer (2, 2a, 2b, 2c, 2d, 2e, 2f), a primary circuit (3), a secondary circuit (4) and a controller (5, 74). The transformer (2, 2a, 2b, 2c, 2d, 2e, 2f) includes a primary winding (21, 21a, 21b, 21c, 21d, 21e, 21f) and a secondary winding (22, 22a, 22b, 22c, 22d, 22e, 22f). The primary circuit (3) is connected with the primary winding (21, 21a, 21b, 21c, 21d, 21e, 21f) and includes a plurality of first primary switches (Q1, Q2, Q1a, Q2a, Q3a, Q4a, Q1b, Q2b, Q1c, Q2c, Q1d, Q2d, Q1e, Q2e), and a plurality of second primary switches (Q3, Q4, Q1a, Q2a, Q3a, Q4a, Q1b, Q2b, Q3d, Q4d, Q3e, Q4e). The secondary circuit (4) is connected with the secondary winding (22, 22a, 22b, 22c, 22d, 22e, 22f). The controller (5, 74) is configured to alternately control the operation of the first primary switches (Q1, Q2, Q1a, Q2a, Q3a, Q4a, Q1b, Q2b, Q1c, Q2c, Q1d, Q2d, Q1e, Q2e) and the second primary switches (Q3, Q4, Q1a, Q2a, Q3a, Q4a, Q1b, Q2b, Q3d, Q4d, Q3e, Q4e) for periodically adjusting a turn-off loss difference therebetween.

A wireless charging module with power switching and a control method thereof. The wireless charging module includes a charging base and a wireless charging pad. The charging base includes a seat body and a first connector. The seat body has an accommodation region. The first connector is exposed in the accommodation region. The wireless charging pad is detachably disposed in the accommodation region. The wireless charging pad includes a controller unit and a second connector. The controller unit is electrically connected to the second connector. The first connector and the second connector are configured to be mated or separated. When the controller unit detects that the first connector and the second connector are separated, the controller unit controls the wireless charging pad to output a first charging power. When the controller unit detects that the first connector and the second connector are mated, the controller unit controls the wireless charging pad to output a second charging power, the second charging power being greater than or equal to the first charging power.

The present disclosure discloses a cable sheath and a charging gun for the cable sheath. The cable sheath includes an inner portion and an outer portion. The inner portion includes a first engaging portion, a second engaging portion and two first hollow portions. The first engaging portion includes a first penetrating portion. A center of the first penetrating portion includes a first axial. The second engaging portion includes a second penetrating portion. A center of the second penetrating portion includes a second axial. An angle is formed between the first axial and the second axial. The angle is less than 170 degrees. The first hollow portions are disposed at a connection between the first engaging portion and the second engaging portion. The first hollow portions are penetrated through a lateral surface of the inner portion. Each of the first hollow portions includes a width in a direction from the first engaging portion toward the second engaging portion. The outer portion includes a lateral surface, a third penetrating portion and a second hollow portion. The third penetrating portion is penetrated along an axial direction of the outer portion. The second hollow portion is penetrated through the lateral surface.

An Ethernet power source equipment (PSE) is coupled to a load device (200), and the Ethernet PSE includes a power supply device (1), an output control circuit (4), a path control circuit (20), and a control module (22). When the output control circuit (4) detects that the load device (200) is not coupled to an output terminal (100-3) of the Ethernet PSE, the path control circuit (20) disconnects a power supplying path (Lp) between the output terminal (100-3) to the control module (22), and the output control circuit (4) adjusts an output voltage (Vo) to a first voltage (Vo1) so that the control module (22) enters a disabled state. When the output control circuit (4) detects that the load device (200) is coupled to the output terminal (100-3), the path control circuit (20) short-circuits the power supplying path (Lp), and the output control circuit (4) adjusts the output voltage (Vo) to a second voltage (Vo2) so that the control module (22) enters an enabled state.

The present disclosure relates to the technical field of electronic power, and in particular to a server, which includes a data processing apparatus and a first heatsink, the data processing apparatus includes a load group and a power supply module group, the load group includes at least two loads, and the power supply module group supplies power to the loads; the first heatsink is thermally connected to the power supply module group, at least part of a projection of the first heatsink in a first plane is located outside a load region, the first plane is parallel to an upper surface of the load, the load region is a minimum outer contour projection region of the load group that can cover all loads in the first plane.

A power supply includes a power converter, a feedback circuit, a control signal generating circuit and a compensating circuit. The power converter generates an output voltage at an output node. The feedback circuit generates a feedback signal according to an output node voltage. The control signal generating circuit provides a control signal to the power converter according to the feedback signal. The compensating circuit includes a reference voltage circuit, a voltage dividing circuit and a switching circuit. When the output node voltage is decreased from the first voltage level to a level threshold or decreased from the first voltage level by an amplitude threshold, the switching circuit is conducted to couple the feedback circuit to the voltage dividing circuit, so the feedback circuit sets the control signal generating circuit to increase a duty cycle of the control signal and/or decrease a frequency of the control signal.

An electronic device (100) to calculate input power (Pr) input to a resonant tank in a resonant circuit (102) includes a bandpass filter (108), a phase detection circuit (110), a peak detection circuit (112), and a processor (114). The bandpass filter receives a resonant current (irp) input to the resonant tank, and filters the resonant current to generate a first baseband current (irp,BPF). The phase detection circuit calculates a phase difference (θv1-i1 ) between the first baseband current and a resonant tank voltage (Vrp) input to the resonant tank. The peak detection circuit generates a baseband current peak value (Irp,PDC) according to the first baseband current. The processor performs a fast Fourier transform on the resonant tank voltage to obtain a resonant tank baseband voltage (Vrp1 ). The processor calculates the input power according to the resonant tank baseband voltage, the baseband current peak value, and the phase difference.

An optical phased array chip (1) includes: a light-emitting unit (11), configured to generate an optical emission signal (LT); a beam-splitting unit (12), connected to the light-emitting unit (11), and configured to transmit the optical emission signal (LT) to an optical antenna unit (13) and receive and transmit a diffusely reflected optical return signal (RLT) to a photodetector unit (14); the optical antenna unit (13), connected to the beam-splitting unit (12), configured to transmit the optical emission signal (LT), and configured to receive and transmit the diffusely reflected optical return signal (RLT) to the beam-splitting unit (12); the photodetector unit (14), connected to the beam-splitting unit (12), and configured to receive and transmit the diffusely reflected optical return signal (RLT) to a signal processing unit (15); and the signal processing unit (15), connected to the photodetector unit (14), and configured to receive the diffusely reflected optical return signal (RLT) in an electric current signal manner converted by the photodetector unit (14) and generate a sensing information.

A double-layer antenna (11), used for an optical phased array chip (1), the double-layer antenna (11) including: a substrate (110); a bottom protective layer (113B), disposed above the substrate (110); a light guide layer (111), disposed above the bottom protective layer (113B); a grating layer (112), disposed above the light guide layer (111), and including a plurality of grating bodies (1121); the grating bodies (1121) arranged periodically with a spacing (2G) along a first axis (SA1) of the light guide layer (111); each of the grating bodies (1121) disposed along a second axis (SA2) of the light guide layer (111); and a top protective layer (113T), disposed above the light guide layer (111) and the grating bodies (1121). A refractive index of the grating layer (112) and a refractive index of the light guide layer (111) are different.

This disclosure provides a bipolar-independent DC power delivery system. The bipolar-independent DC power delivery system includes a grid-tied power electronic converter, a bipolar DC power busway, and a power conversion unit. The grid-tied power electronic converter connects to a medium-voltage distribution grid and converts the distribution grid voltage to two independent DC voltages with same magnitude and opposite polarities. The bipolar DC power busway connects two independent DC voltages generated from the grid-tied power electronic converter to the power conversion unit. The power conversion unit can receive or send electric power from one or two independent DC voltage(s). The proposed DC power delivery system can continue to operate at de-rated power when one of two independent DC voltages fails.

A resonant converter (1) is provided. The detection circuit (7) detects the voltage and/or the current of the output terminal (Vo, VoL). The controller (8) controls the startup frequency of the two first switches (Q1, Q2) and the two second switches (Q3, Q4) according to the voltage and/or the current of the output terminal (Vo, VoL) detected by the detection circuit (7). The soft startup procedure is executed. Consequently, the switching stress of the synchronous rectifier circuit (6) is reduced. The resonant converter (1) of the present disclosure has advantage of enhancing lifespan, enhancing efficiency and enhancing stability of the system.

A non-isolated AC voltage modulation circuit (1, 1a, 1b, 1c, 1d, 1e, 1f) includes an input terminal, an output terminal, a first switch bridge arm (B1), a second switch bridge arm (B2) and a voltage conversion circuit (2). The switch bridge arms (B1, B2) include switches (SW1, SW2, SW3, SW4) sequentially connected in series between a first and a third connection terminal (T1, T3) of the output terminal. The voltage conversion circuit (2) includes a resonant circuit (20, 20a, 20b, 20c) and a soft switch circuit (21, 21a, 21b, 21c). The resonant circuit (20, 20a, 20b, 20c) is connected between a first node (A) and a second node (B) among the switches (SW1, SW2, SW3, SW4). The soft switch circuit (21, 21a, 21b, 21c) includes a fourth connection terminal (211) connected to one of the first node (A) and the second node (B), and a fifth connection terminal (212) connected to one of the first, the second and the third connection terminals (T1, T2, T3) of the output terminal. Alternatively, the fourth connection terminal (211) is connected to a main resonant inductor of the resonant circuit (20, 20a, 20b, 20c), and the fifth connection terminal (212) is connected to the second connection terminal (T2).

A resonant converter (100) is provided. The resonant converter (100) includes a primary circuit (2), an integrated transformer (1), a secondary circuit (3), a local ground (102), a first Y capacitor (CY1, CY2) and a second Y capacitor (CY3, CY4). The primary circuit (2) has a first positive line and a first negative line. The integrated transformer (1) is electrically connected to the primary circuit (2). The secondary circuit (3) is electrically connected to the integrated transformer (1) and has a second positive line and a second negative line. The first Y capacitor (CY1, CY2) is coupled between the local ground (102) and the first positive line or the first negative line of the primary circuit (2). The second Y capacitor (CY3, CY4) is coupled between the local ground (102) and the second positive line or the second negative line of the secondary circuit (3). The first Y capacitor (CY1, CY2), the second Y capacitor (CY3, CY4) and the local ground (102) are configured to circulate common mode noise currents between the primary circuit (2) and the secondary circuit (3).

An AC-AC converter (1, 1a, 1b, 1c, 1d, 1e, 1f, 1g, 1h, 1i, 1j, 1m, 1n) and a power supply system (9) are provided. The AC-AC converter (1, 1a, 1b, 1c, 1d, 1e, 1f, 1g, 1h, 1i, 1j, 1m, 1n) of the present disclosure includes a first AC terminal (2) with two sub terminals (21, 22), a second AC terminal (3) with three sub terminals (31, 32, 33), and a first bridge arm (4) with two switch assemblies (41, 42). The AC-AC converter (1, 1a, 1b, 1c, 1d, 1e, 1f, 1g, 1h, 1i, 1j, 1m, 1n) receives and converts the input power between two wires and three wires. The two switch assemblies (41, 42) are activated, and bidirectional power flow is allowed. The two switch assemblies (41, 42) are performed as a voltage source for supporting both balanced and unbalanced loads. Both active and reactive power are also supported. Moreover, the AC-AC converter (1, 1a, 1b, 1c, 1d, 1e, 1f, 1g, 1h, 1i, 1j, 1m, 1n) of the present disclosure has the advantages of reducing weight, size and cost, and enhancing conversion efficiency.

A system (1) for interactive machine parameters optimization including a database (12) and a processor ()11 is disclosed. The database (12) records multiple parameter categories (121), which are used for quality test. The processor (11) executes following actions: obtaining a batch recommended parameter combinations number; generating at least one parameter combination according to the parameter categories (121) and the batch recommended parameter combinations number; performing at least one stage-testing to a product produced based on the parameter combination to generate a testing result for the parameter combination of each stage-testing, wherein, until current stage reaches a preset testing stage, obtaining another parameter combination satisfied current stage-standard and performing next stage-testing to the product corresponding to the obtained parameter combination; generating an optimized parameter combination when the preset stage is reached and a default termination condition is satisfied; and, when the preset stage is reached but the default termination condition is unsatisfied, repeating the actions.

An extended charging device is provided. The extended charging device comprises an AC/DC conversion unit (2), at least one DC/DC conversion unit (3), a microcontroller (4), and a plurality of charging units (5), wherein a control switch (52) of each charging unit (5) is coupled between the output of the DC/DC conversion unit (3) and the battery holder (51). The DC/DC conversion unit (3) only charges a single battery at a time by controlling the control switch (52) of each charging unit (5) with the microcontroller (4), which can effectively avoid the situation where a fully charged battery continues to be charged, thereby reducing unnecessary energy loss.

An uninterruptible power supply system includes a bidirectional AC-DC converter, a resonant converter, an automatic voltage regulation circuit and a control unit. When an AC input voltage is out of a predetermined voltage range and within a voltage regulation range, the automatic voltage regulation circuit, the resonant converter and the bidirectional AC-DC converter generate an AC supplementary voltage at an output terminal based on the AC input voltage and generate an AC output voltage based on the AC input voltage and the AC supplementary voltage, so that the AC output voltage is within the predetermined voltage range. When the AC input voltage is out of the voltage regulation range, the resonant converter and the bidirectional AC-DC converter generate the AC output voltage at the output terminal based on discharge voltage of a battery, so that the AC output voltage is within the predetermined range.

The present invention provides a magnetic component (1a, 1b, 2, 3, 4, 5). The magnetic component (1a, 1b, 2, 3, 4, 5) includes a magnetic core (11, 21, 31, 41), at least one winding (12, 22, 32, 42, 52) and at least one insulating and thermal-conducting element (13, 23, 33). The at least one winding (12, 22, 32, 42, 52) is wound around the magnetic core (11, 21, 31, 41). The at least one insulating and thermal-conducting element (13, 23, 33) is configured to at least partially encapsulate or be attached and coupled to at least one of the magnetic core (11, 21, 31, 41) and the winding (12, 22, 32, 42, 52). The insulating and thermal-conducting element (13, 23, 33) is served as a thermal bus path for transferring the heat generated by the magnetic core (11, 21, 31, 41) and/or the winding (12, 22, 32, 42, 52).