An apparatus for assembling a permanent-magnet electric motor to be used particularly in pumping devices, which comprises a tubular element made of non-magnetic material, to be inserted and coupled in the axial cavity of a stator of an electric motor, and adapted to accommodate inside it a rotor of an electric motor.

An actuator and its clutch are provided. The clutch includes a driving shaft; a mounting base fixed to the driving shaft for rotation with the driving shaft; a connecting base for connecting with a load, the connecting base including fingers surrounding an outer circumference of the driving shaft; resilient member including a resilient member, the resilient member having two ends respectively fixed to the mounting base and the connecting base, the resilient member surrounding an outer circumference of the connecting tabs. When a rotation speed of the driving shaft is greater than a rotation speed of the connecting base, an inner diameter of the resilient member gradually decreases so as to gradually couple the coupling portion with the driving shaft, such that the rotation speed of the coupling portion gradually approaches or reaches the rotation speed of the driving shaft. The present invention can provide a buffering function at the phase of the startup of the motor to avoid the motor startup failure and damage to the motor.

A fluid generating apparatus includes a single phase motor including a stator and a rotor rotatable relative to the stator, a fluid generating device including a plurality of blades, and a clutch connected between the rotor and the fluid generating device for transmitting torque from the rotor to the fluid generating device. The clutch includes a resilient member having one end connected to the rotor for rotation with the rotor and the other end connected to the fluid generating device for driving the fluid generating device to rotate.

A motor driving assembly includes a single phase motor and a torque transmission mechanism. The torque transmission mechanism includes a driving member being driven by the motor, a driven member for driving a load to rotate along a predetermined direction, and a connecting device comprising a resilient member and a damping member. The resilient member includes one end connected to the driving member and the other end connected to the driven member. The damping member is coated on or attached over the resilient member, or filled in a gap of the resilient member, or the resilient member is made from a damping material in order to reduce noise produced by the resilient member.

A high energy spring drive to control a high voltage circuit breaker is described. The high energy spring drive includes a closing assembly positioned at a first end and an opening assembly positioned at a second end, a charging assembly positioned between the closing and opening assembly, and a transmission assembly. The closing and opening assembly control the closing and opening of circuit breaker. The charging assembly includes a worm wheel arrangement coupled to a motor to transfer torque to a motor shaft, to energize the closing assembly, a decoupling mechanism to decouple the worm wheel arrangement from the motor shaft on energization of the closing assembly, and a cam-follower mechanism. The transmission assembly actuated by the follower of the cam-follower mechanism is to electrically close a circuit breaker when the follower rotates in a first direction and electrically open the circuit breaker when the follower rotates a second direction.

A high energy spring drive to control a high voltage circuit breaker is described. The high energy spring drive includes a closing assembly positioned at a first end and an opening assembly positioned at a second end, a charging assembly positioned between the closing and opening assembly, and a transmission assembly. The closing and opening assembly control the closing and opening of circuit breaker. The charging assembly includes a worm wheel arrangement coupled to a motor to transfer torque to a motor shaft, to energize the closing assembly, a decoupling mechanism to decouple the worm wheel arrangement from the motor shaft on energization of the closing assembly, and a cam-follower mechanism. The transmission assembly actuated by the follower of the cam-follower mechanism is to electrically close a circuit breaker when the follower rotates in a first direction and electrically open the circuit breaker when the follower rotates a second direction.

A high-efficiency self-generator includes a rotating body assembly including an outer rotor that is formed to be rotatable with a first central axis as a center point and a plurality of inner rotors, a power generation device that is connected to the outer rotor and generates electricity by rotation of the outer rotor, a pedal device configured to convert an external force generated by a user into a rotational driving force, a gear device configured to rotate the inner rotors, a reduction device configured to change a power transmission ratio between the pedal device and the gear device, a starting device configured to rotate the outer rotor by transmitting the rotational driving force generated by the pedal device to the outer rotor, and a gear control device configured to intermittently rotate the inner rotor.

A dual motor drive assembly comprises a housing, a shaft rotatably mounted with respect to the housing, a first gear connected to and configured to rotate with the shaft, and first and second motors, each having an output driving a respective output gear, the output gears being engaged with the first gear, in which each motor comprises a permanent magnet motor that has the same number of poles and stators such that each motor produces the same pattern of cogging torque over a complete mechanical revolution of the motor.

A dual motor drive assembly comprises a housing, a shaft rotatably mounted with respect to the housing, a first gear connected to and configured to rotate with the shaft, and first and second motors, each having an output driving a respective output gear, the output gears being engaged with the first gear, in which each motor comprises a permanent magnet motor that has the same number of poles and stators such that each motor produces the same pattern of cogging torque over a complete mechanical revolution of the motor.

A drive system for a working machine with a working device which can be unloaded for starting, wherein the drive system comprises at least one main motor, which is designed as an electric machine, in particular as an asynchronous motor, and a motor shaft; an auxiliary motor, which is designed as an electric machine, in particular as an asynchronous motor; and a starting device for starting the auxiliary motor. The auxiliary motor is configured to start and/or accelerate the working machine, in particular up to a synchronous speed of the main motor.