Milwaukee Electric Tool

A power tool including a motor and a power input. The power tool also including a power switching network electrically connected between the power input and the motor and a controller electrically connected to the power switching network. The power switching network includes a plurality of Wide Bandgap Semiconductors (WBS) field effect transistors (FETs). The controller is configured to determine a motor speed of the motor; and generate pulse-width modulated (PWM) signals for the power switching network using field-oriented control (FOC) based on the motor speed. The PWM signals include a switching frequency greater than or equal to 50 kHz.

A power tool including a housing and a motor supported within the housing. The motor includes a stator and a rotor. The rotor is disposed within the stator. The stator includes a stator lamination stack including an external wall, a plurality of stator teeth, and a plurality of stator windings, wherein a length of the stator lamination stack is approximately 6.00mm to 15.00mm. The plurality of stator teeth extend radially inward from the external wall. The rotor includes a rotor lamination stack including a plurality of magnet slots and a plurality of magnets. A length of the rotor lamination stack is approximately 6.00mm to 15.00mm. Each magnet of the plurality of magnets is disposed within a magnet slot of the plurality of magnet slots. A ratio of a stator tooth width to an external wall thickness of the stator is approximately 1.8 to 2.5.

Power tools and methods for motor control. One embodiment provides a power tool including a motor (400), an inverter bridge (228) electrically connected between the power input (340) and the motor (400) including a plurality of switches including wide bandgap transistors. The power tool further includes a controller configured to drive the motor using the power switching network, a pulse width modulation (PWM) generator (276) configured to generate an interrupt at a predefined interval, and a current detector (236) configured to sample a phase current of the motor in response to the interrupt.

A power tool includes a housing and a drive mechanism supported within the housing. The drive mechanism has a motor and a transmission configured to receive torque from the motor. The power tool further includes an output drive operably coupled to the drive mechanism to provide torque to a workpiece and an electro-mechanical speed select mechanism. The electro-mechanical speed select mechanism has a switch operably coupled to the transmission to adjust an operating gear ratio when moving between a first switch position and second switch position, and a collar movably coupled to the housing to electronically adjust an operating speed of the motor. The collar is movable between a first position corresponding to a first electronic speed setting and a second position corresponding to a second electronic speed setting different than the first electronic speed setting.

An impact tool includes a housing, a trigger, and a motor within the housing. The motor includes a rotor and a stator. The rotor is coupled to a motor shaft. An impact mechanism includes a hammer coupled to the motor shaft and an anvil configured to receive impacts from the hammer. The tool includes an output drive device coupled to the anvil and configured to rotate, and an electronic controller including a memory and an electronic processor. The electronic controller is configured to detect a pull of the trigger and control the motor at a first motor power in response to the pull of the trigger, detect an impact of the hammer and anvil of an impact mechanism, determine a proper motor speed and a proper motor torque for satisfactory engagement of the hammer and anvil, and control the motor to operate at the proper motor speed and motor torque.

Earmuffs with a joint are provided to create a biased pressure distribution about a perimeter of the cup. The earmuffs may include a pivot joint. The pressure distribution creates a wedging pressure (e.g., on a top edge) on the cups that hold the earmuffs on the user's head, for example, when the user rotates the headband behind the head. The bias pressure is also used to adjust the seal formed between the pad and the user's head. Adjustments to the moment created by separating the joints from the cup's apex enable a user to selectively adjust the seal according to the user's preference. A cam is added to the headband to change the hoop stress distributed at the joints and further adjust the compressive forces generated to hold the earmuffs against the user's head.

A working head (22) for a hydraulic power tool (10). The working head (22) includes a head frame and a first moveable die head configured to move along the working head frame (25). The first moveable die head is configured to receive a first moveable die (200) comprising a first body length and a second die head is adapted to receive a second die (250) comprising a second body length. At least one of the moveable die (200) or stationary die (250) comprises an elongated die.

A power tool includes a housing and a battery pack having a body with a first end and a second end opposite the first end, a positive battery terminal disposed on the first end of the body, and a negative battery terminal disposed on the first end of the body. The power tool further includes a battery pack interface supported by the housing and configured to receive the battery pack. The battery pack interface has a first cap with a plurality of resilient members configured to interact with the first end of the battery pack and a second cap configured to secure the battery pack within the battery pack interface.

A tool with a reversible ratchet mechanism is shown. The ratchet mechanism includes a gear structure, pawl structure, and a switching mechanism such that the ratchet mechanism allows tightening in the clockwise and counterclockwise direction. The ratchet mechanism further includes a biasing component for pawl movement and another biasing component engaged with the switching mechanism to provide tactile feedback.

A battery pack charger includes a battery pack interface configured to removably receive a battery pack, a charging circuit electrically connected to the battery pack interface, a discharging circuit electrically connected to the battery pack interface, and a common charging and discharging line connected to the charging circuit and the discharging circuit.