A method is presented for operating a power tool during installation of a deformable fastener. The method includes: receiving measures of current supplied to a motor of the power tool during operation of the power tool; determining rate of change of the current during operation of the power tool; determining occurrence of the power tool engaging the fastener based on the magnitude of the current supplied to the motor; determining occurrence of the power tool swaging the fastener based on the rate of change of the current; determining completion of the power tool swaging the fastener based on the magnitude of the current and the rate of change of the current; and verifying quality of the installation of the fastener using the determination of the occurrence of the power tool engaging the fastener and the determination of the completion of the power tool swaging the fastener.

A method is presented for operating a power tool during installation of a deformable fastener. The method includes: receiving measures of current supplied to a motor of the power tool during operation of the power tool; determining rate of change of the current during operation of the power tool; determining occurrence of the power tool engaging the fastener based on the magnitude of the current supplied to the motor; determining occurrence of the power tool swaging the fastener based on the rate of change of the current; determining completion of the power tool swaging the fastener based on the magnitude of the current and the rate of change of the current; and verifying quality of the installation of the fastener using the determination of the occurrence of the power tool engaging the fastener and the determination of the completion of the power tool swaging the fastener.

An apparatus for reducing belt slip of a vehicle, in which the vehicle includes an engine as a vibration source and an electric motor connected to the engine through a belt to transmit torque of the engine, includes: a signal generator configured to generate a reference signal with a frequency corresponding to vibration of the engine; an adaptive filter configured to calculate a filter coefficient to remove an error value between a rotational speed of the engine and a rotational speed of the electric motor and apply the filter coefficient to the reference signal to generate a reference torque signal; and a torque compensator configured to generate a belt slip compensation torque signal by changing an amplitude of the reference torque signal, and apply the belt slip compensation torque signal to determine a final torque command of the electric motor.

A permanent magnet speed governor having a fixed magnetic gap. The permanent magnet speed governor includes an outer magnetic rotor and an inner magnetic rotor, at least two outer permanent magnets being evenly distributed along the circumferential direction of the inner circumferential surface of the outer magnetic rotor, the magnetic poles of the outer permanent magnets being arranged along the radial direction, the magnetisms of exposed magnetic pole surfaces of two adjacent outer permanent magnets being different. At least one rotatable permanent magnet is distributed along the circumferential direction of the outer circumferential surface of the inner magnetic rotor, the rotatable permanent magnet being cylindrical and the N pole and the S pole being along the diametrical direction, one end of the rotatable permanent magnet being provided with a magnetic circuit regulator. It increases the engagement area of the speed governor.

A hybrid power system including a control core, a driving mechanism, an internal combustion engine, an electric motor, and a storage battery is provided. The driving mechanism is controlled by the control core. The internal combustion engine is connected to the driving mechanism and controlled by the control core. The electric motor is connected to the driving mechanism and controlled by the control core. The storage battery is coupled to the electric motor and the control core. In response to a required torque being input to the control core, the control core executes an equivalent consumption minimization strategy and actuates the internal combustion engine and/or the electric motor to transmit power to the driving mechanism.

A system and control method for displacing a fluid out of an air gap of a propulsion motor is based upon at least one electric propulsion motor parameter and may include actuating an air injection pump configured to inject air into the air gap.

A method is presented for operating a power tool during installation of a deformable fastener. The method includes: receiving measures of current supplied to a motor of the power tool during operation of the power tool; determining rate of change of the current during operation of the power tool; determining occurrence of the power tool engaging the fastener based on the magnitude of the current supplied to the motor; determining occurrence of the power tool swaging the fastener based on the rate of change of the current; determining completion of the power tool swaging the fastener based on the magnitude of the current and the rate of change of the current; and verifying quality of the installation of the fastener using the determination of the occurrence of the power tool engaging the fastener and the determination of the completion of the power tool swaging the fastener.

An actuator for connecting and disconnecting a dog clutch having an axially moveable sleeve (3), the actuator (4) comprising an electric motor (6), wherein a rotor (61) of the motor is connected to a rotatable actuator rod (7), which is provided at its end with an eccentric pin (5) for such cooperation with the clutch sleeve (3) that a rotation of the actuator rod (7) 180? or less by means of the motor from a rotational position corresponding to one axial end position of the clutch sleeve (3) to a rotational position corresponding to the other axial end position of the clutch sleeve (3) leads to a connection or disconnection of the dog clutch.

Systems and methods for implementing an electronic clutch in a powered fastener driver. One fastener driver includes a motor, a trigger, a position sensor, a speed sensor, and a controller. The position sensor is configured to sense a position of the lifting assembly. The speed sensor is configured to sense a speed of the motor. The controller is configured to provide power to the motor. The controller is configured to receive speed signals from the speed sensor indicative of the speed of the motor, and determine whether the speed of the motor has dropped by a speed drop threshold within a first period of time. The controller is configured to activate an electronic clutch to electronically brake the motor for a second period of time. In response to the second period of time having passed, the controller is configured to provide power to the motor.

This clutch control device includes a clutch device configured to connect or disconnect power transmission between a prime mover and an output target, a clutch actuator configured to output a drive force for actuating the clutch device, and a control unit configured to control driving of the clutch actuator, in which the clutch actuator is provided with a drive source that outputs the drive force and a power transmission mechanism that is disposed between the drive source and the clutch device, and the control unit detects parameter values corresponding to friction of the clutch actuator on the basis of a delay in driving of the power transmission mechanism with respect to a change in a control parameter for the drive source, and controls driving of the drive source through use of a control parameter including at least a part of the parameter values corresponding to the friction.