Harden, Henry Simon

Embodiments for generating patient-specific implants for anatomical structures of patients are disclosed. One embodiment includes a method that includes receiving image data of an anatomical structure of a patient, where the image data indicates a fracture site associated with the anatomical structure; receiving manipulation data associated with manipulation of one or more parameters associated with the fracture site in a virtual reality environment; visualizing a three-dimensional (3D) model of the anatomical structure based on the image data, the one or more parameters, and the manipulation data, where the 3D model is visualized in a 3D space; generating a set of instructions for a printer based on the 3D model, and controlling the printer for generating a 3D printed model of the anatomical structure based on the set of instructions. The 3D printed model is configured to receive an implant, such that the implant is contoured to match the fracture site.

Provided in the present disclosure is a bypass module, including a chassis, thyristor components and a busbar component. Thyristor components include an insulating plate fixed within the chassis, heat sinks and thyristors. The busbar component includes bridging busbars electrically connected to the heat sinks and vertical busbars for electrically connecting the bridging busbars to a counter plug terminal, the counter plug terminal includes an input terminal and an output terminal, and the input terminal and the output terminal are electrically connected to the vertical busbars respectively. In the bypass module provided by the present disclosure, the heat sinks are electrically connected to the input terminal and the output terminal of the counter plug terminal of the cabinet through the bridging busbars and the vertical busbars. In this way, a utilization of the internal space of the chassis can be effectively improved, so that the bypass module is more reasonable and a size of the bypass module is reduced, so that ease of maintenance of the bypass module by an operator is effectively improved.

Provided are a method and a device for controlling a braking device, and a braking device, with which cost of a braking component of a multi-level inverter is reduced. The braking device includes a first braking component, a second braking component, and at least one third braking component. The first braking component, the at least one third braking component and the second braking component are connected in series. The first braking component is connected in parallel to a first bus capacitor in the inverter, the second braking component is connected in parallel to the last bus capacitor in the inverter, and each third braking component is connected in parallel to two bus capacitors in the inverter. The first braking component and the second braking component include a bridge arm. An upper bridge arm of the first braking component is a diode, a lower bridge arm of the second braking component is a diode, and braking resistors are connected in parallel to the diodes. Each third braking component includes a first bridge arm and a second bridge arm connected in series. A lower bridge arm of the first bridge arm is a diode, an upper bridge arm of the second bridge arm is a diode, and at least one braking resistor is connected in parallel between the lower bridge arm of the first bridge arm and the upper bridge arm of the second bridge arm.

The present disclosure provides a three-phase single-stage AC-DC converter and control method and control apparatus therefor, with which conversion efficiency and power density of the AC-DC converter are improved. The converter includes a three-phase matrix switching circuit, a resonant circuit, an isolation circuit and a rectifier circuit. The three-phase matrix switching circuit is connected to a three-phase AC power and includes three independent switch branches. Each of the switch branches includes an upper bridge arm and a lower bridge arm. An intermediate point between the upper bridge arm and the lower bridge arm in each of the switch branches is connected to a phase of AC input. Each bridge arm includes one bidirectional switch component or two switch components connected in series in reverse. The resonant circuit includes a resonant capacitor, a resonant inductor and an excitation inductor which are connected in series between a common endpoint of upper bridge arms of the three switch branches and a common endpoint of lower bridge arms of the three switch branches. A side of the isolation circuit is connected to the resonant circuit and another side thereof is connected to the rectifier circuit. The rectifier circuit includes at least two switch components. An input side of the rectifier circuit is connected to the isolation circuit, and an output side of the rectifier circuit is connected to a load device.

A current sharing control method and an AC-DC conversion system are provided. The method is applied to a current sharing controller configured to control an operating state of an AC-DC converter comprising at least two rectification units. Each of the at least two rectification units is in a bridge topology combined with an LLC resonant tank. The method comprises: determining a target adjustment phase based on the absolute values of instantaneous values of three-phase input voltages of the at least two rectification units; determining a target duty cycle of the target adjustment phase in each of the rectification units based on the current sampling values of the at least two rectification units; and adjusting, based on the target duty cycle of the target adjustment phase in each of the rectification units, a duty cycle of a control signal for a switch in each of the rectification units.

A current sharing control method and an AC-DC conversion system are provided. The method is applied to a current sharing controller configured to control an operating state of an AC-DC converter comprising at least two rectification units. Each of the at least two rectification units is in a bridge topology combined with an LLC resonant tank. The method comprises: acquiring current sampling values of the at least two rectification units; determining a target phase shift angle of each of the rectification units according to the current sampling values, wherein the target phase shift angle is used to indicate a duration of an input voltage of the LLC resonant tank being in a zero-level state; controlling, according to the target phase shift angle of each of the rectification units, a control signal of a target switch in a bridge topology of each of the rectification units to perform phase shifting.

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