An electric power apparatus includes a main planar body having a circular opening that supports a brushless direct-current (BLDC) motor. The motor includes a stator, a rotor, a motor spindle extending through the circular opening, a first end cap formed on a first side of the stator and mounted on the main planar body; and a second end cap formed on a second side of the stator and secured to the first end cap to form a substantially watertight seal around the stator and the rotor. A ratio of a maximum power output of the motor when powered by at least one battery pack to a height of the motor as measured from an upper surface of the main planar body to a top surface of the motor is greater than or equal to approximately 34 watts/mm.

An electric motor is provided including a stator, a rotor, a motor spindle coupled to the rotor and extending along a center axis, a first end cap formed on a first side of the stator, a second end cap formed on a second side of the stator and secured to the first end cap to form a first compartment around the stator and the rotor, an electro-magnetic brake module disposed on a side of the second end cap opposite the stator and engaged with the motor spindle, and a motor cover mounted on the second end cap to form a second compartment around the electro-magnetic brake module. The first end cap, the second end cap, and the motor cover form a substantially watertight seal around the stator, the rotor, and the position sensor assembly.

An electric power apparatus includes a main planar body having a circular opening that supports a brushless direct-current (BLDC) motor. The motor includes a stator, a rotor, a motor spindle extending through the circular opening, a first end cap formed on a first side of the stator and mounted on the main planar body; and a second end cap formed on a second side of the stator and secured to the first end cap to form a substantially airtight sealed compartment around the stator and the rotor. The rotor includes a series of openings in a radial wall that generates an airflow circulating through the sealed compartment to transfer heat from the stator to the first end cap and the second end cap.

A control module for a high power motor includes a mounting frame made up of thermally-conductive material including a bottom wall and four side walls; a circuit board disposed within the side walls of the mounting frame; power switches configured as an inverter circuit oriented in two arrays mounted on opposite surfaces of the circuit board; an auxiliary circuit board extending substantially perpendicularly from the circuit board; capacitors mounted on the auxiliary circuit board with a long axis thereof extending parallel to the circuit board and away from the power switches; and connectors mounted between an edge of the circuit board and distal ends of the capacitors.

An example system includes a disk that is rotatable and has a plurality of ferromagnetic elements disposed in a radial array on a surface of the disk; and at least one electro-permanent magnet (EPM) mounted adjacent to the disk such that a gap separates the disk from the EPM. Applying an electric pulse to the at least one EPM changes a magnetic state thereof, thereby generating an external magnetic field that traverses the gap between the disk and the EPM and interacts with a ferromagnetic element of the plurality of ferromagnetic elements, and causing a rotational speed of the disk to change as the disk rotates.

A motor brake module for braking a motor is provided. The motor includes a shell, a shaft portion and a driving portion. The motor brake module includes a brake assembly, a block assembly and an armature assembly. The brake assembly includes a shaft hole, plural teeth and plural openings. The shaft portion passes through the shaft hole, and the shaft portion drives the brake assembly to rotate when the shaft portion is rotated. The armature assembly is connected with the block assembly for driving the block assembly to move between the armature assembly and the brake assembly. When the block assembly is moved toward the brake assembly, a portion of the block assembly is contacted with one of the plural teeth and the other portion of the block assembly passes through one of the plural openings.

A motor drive unit having an inboard brake in which a lateral weight distribution is balanced is provided. In the motor drive unit, output torque of a drive motor is distributed to a right driveshaft and a left driveshaft via a drive gear a drive gear fitted onto an output shaft thereof. A brake rotor is also fitted onto the output shaft to be rotated integrally therewith. A brake device stops rotation of the drive gear by engaging the brake rotor with a brake stator that is allowed to rotate relatively to the brake rotor but restricted to rotate in a rotational direction of the brake rotor. The brake device is disposed on an opposite side of the drive motor across the drive gear.

A motor system includes a motor, and a multi-turn absolute encoder that detects a rotation number and an absolute angular position of a rotation shaft of the motor. The multi-turn absolute encoder includes: an absolute angular position detection device that detects the absolute angular position within one rotation period of the rotation shaft; and a storage element that stores the rotation number of the motor. Even if the driving of the multi-turn absolute encoder is stopped while the motor is stopped, the multi-turn absolute encoder detects the multi-turn position of the rotation shaft after startup. Further, the motor has a brake mechanism including: a gear-type brake wheel that rotates integrally with the rotation shaft; an engagement member capable of engaging with the teeth of the gear-type brake wheel; and an actuator which causes the teeth and the engagement member to engage with each other during braking.

A blending appliance includes a housing with a jar receiving area defined between an upper housing and a support base. A blender jar includes a base portion and a receptacle portion, and is configured to be laterally received within the jar receiving area of the housing. A magnetic coupling system includes an upper magnetic coupler disposed in the base portion of the blender jar and a lower magnetic coupler disposed in the support base of the housing. The upper and lower magnetic couplers are magnetically coupled to one another for driving a blade assembly disposed in the receptacle portion of the blender jar. A brake mechanism is disposed on the upper magnetic coupler and is configured to stop rotation of the upper magnetic coupler when the blender jar is removed from the jar receiving area.

A blending appliance includes a housing with a jar receiving area defined between an upper housing and a support base. A blender jar includes a base portion and a receptacle portion, and is configured to be laterally received within the jar receiving area of the housing. A magnetic coupling system includes an upper magnetic coupler disposed in the base portion of the blender jar and a lower magnetic coupler disposed in the support base of the housing. The upper and lower magnetic couplers are magnetically coupled to one another for driving a blade assembly disposed in the receptacle portion of the blender jar. A brake mechanism is disposed on the upper magnetic coupler and is configured to stop rotation of the upper magnetic coupler when the blender jar is removed from the jar receiving area.