A magnetic geared rotating electrical machine is provided with a stator, a low-speed rotor which includes a plurality of pole pieces arranged in a circumferential direction of the stator and is installed inside the stator, a high-speed rotor which includes a plurality of second magnets as magnets facing the plurality of pole pieces and is installed inside the low-speed rotor, a first piezoelectric element which is provided in each of the plurality of pole pieces and which converts a vibration into an electric signal, and a control unit which is connected to the first piezoelectric element and performs vibration damping of the pole piece on the basis of an output voltage of the first piezoelectric element.

Monitoring a brake that includes first and second braking surfaces and a magnetizing device that, in response to the electric current supplied to them, are arranged to generate a magnetic field that is arranged to move the braking surfaces from a closed state, in which the braking surfaces are connected to each other, to an open state, in which the braking surfaces are separated from each other. Determining the electric current of the brake as the braking surfaces begin to move from the closed state to the open state, determining the maximum electric current of the magnetizing device of the brake in the open state, determining the condition of the brake as a current ratio from the electric current measured as the braking surfaces start to move to the maximum electric current.

A high torque reluctance brake device for fitness equipment, comprising: an external rotor including a flywheel and an outer ring body; at least two magnetic resistance mechanisms, each of them has a brake field core, a magnetic coil; a support frame for arranging magnetic resistance mechanisms to form an angle larger than 30 degree and to make between the outer periphery of the brake field core and the outer ring body has a gap; the control circuit unit transmits suitable current to the magnetic coil, then between the brake field core and the magnetic ring produced a eddy current magnetic resistance and forms a reverse resistance to the external rotor. By choosing different resistance setting can increase the variability of exercise and improve the comfort of exercise.

A high torque reluctance brake device for fitness equipment, comprising: an external rotor including a flywheel and an outer ring body; at least two magnetic resistance mechanisms, each of them has a brake field core, a magnetic coil; a support frame for arranging magnetic resistance mechanisms to form an angle larger than 30 degree and to make between the outer periphery of the brake field core and the outer ring body has a gap; the control circuit unit transmits suitable current to the magnetic coil, then between the brake field core and the magnetic ring produced a eddy current magnetic resistance and forms a reverse resistance to the external rotor. By choosing different resistance setting can increase the variability of exercise and improve the comfort of exercise.

A method of controlling a portable appliance includes measuring an input current supplied to a motor of the portable appliance and measuring a rotational speed of a shaft of the motor. The method also includes determining a current limit based on the rotational speed of the shaft using a substantially continuous function which relates a domain of rotational speeds to a range of current limits. The method further includes reducing, when the input current exceeds the current limit, the rotational speed of the shaft incrementally along the substantially continuous function until the input current is approximately equal to the current limit.

A method comprises providing a line-start synchronous motor. The motor has a stator, a rotor core disposed within the stator, and a motor shaft. In accordance with a step of the method, a coupling for coupling a load to the motor is provided. The coupling has a motor shaft attachment portion configured to provide substantially concentric contact around the shaft at the end of the motor shaft. The coupling has a load attachment portion configured to operatively connect to a load. In accordance with a step of the method, a load is coupled to the motor with the coupling, and driven from start to at least near synchronous speed during steady state operation of the motor with a load coupled thereto. The motor shaft attachment portion may comprise a bushing assembly with matching and opposed tapered surfaces that cooperate to secure the motor shaft attachment portion around the motor shaft.

A method for controlling a braking system of an electromagnetic motor, the electromagnetic motor having a moveable output shaft, comprising the steps of: receiving a velocity signal and/or an acceleration signal based on movement of the output shaft, said velocity signal and/or acceleration signal having a respective frequency spectrum; identifying an event from the velocity and/or the acceleration signal using the respective frequency spectrum, wherein said event corresponds to an uncontrolled movement of the output shaft and has a characteristic frequency spectrum.

A method for controlling a braking system of an electromagnetic motor, the electromagnetic motor having a moveable output shaft, comprising the steps of: receiving a velocity signal and/or an acceleration signal based on movement of the output shaft, said velocity signal and/or acceleration signal having a respective frequency spectrum; identifying an event from the velocity and/or the acceleration signal using the respective frequency spectrum, wherein said event corresponds to an uncontrolled movement of the output shaft and has a characteristic frequency spectrum.

A control apparatus/method for operating an electromechanical brake booster of a vehicle braking system, including: applying control to an electromechanical brake booster motor in consideration at least of a braking definition signal regarding a braking input of a driver and/or automatic speed control system of the vehicle (ACC); specifying, in consideration at least of the braking definition signal, a target motor force of the electromechanical brake booster motor or a target brake application force of the electromechanical brake booster into a brake master cylinder, downstream from the electromechanical brake booster, of the braking system; and applying control to the electromechanical brake booster motor in consideration of a force difference between the specified target motor force and an estimated/measured actual motor force of the motor, or between the specified target brake application force and an estimated/measured actual brake application force of the electromechanical brake booster into the downstream brake master cylinder.

A control apparatus/method for operating an electromechanical brake booster of a vehicle braking system, including: applying control to an electromechanical brake booster motor in consideration at least of a braking definition signal regarding a braking input of a driver and/or automatic speed control system of the vehicle (ACC); specifying, in consideration at least of the braking definition signal, a target motor force of the electromechanical brake booster motor or a target brake application force of the electromechanical brake booster into a brake master cylinder, downstream from the electromechanical brake booster, of the braking system; and applying control to the electromechanical brake booster motor in consideration of a force difference between the specified target motor force and an estimated/measured actual motor force of the motor, or between the specified target brake application force and an estimated/measured actual brake application force of the electromechanical brake booster into the downstream brake master cylinder.