Contactless power supply and motor control system

A system, comprising:

• an actuator including at least one component that is rotatable about a first rotational axis;
• and
• a motor control system, the motor control system comprising:
• a pulse width modulator configured to supply a first pulse width modulated (PWM) signal, the first PWM signal having a duty cycle and a first amplitude;
• a rotary transformer having a primary winding and a secondary winding, the primary winding coupled to receive the PWM signal from the pulse width modulator, the secondary winding coupled to the at least one component and rotatable therewith, relative to the primary winding, about the first rotational axis, the secondary winding configured to supply a second PWM signal having the duty cycle and a second amplitude;
• a demodulator circuit rotatable with the secondary winding about the first rotational axis, the demodulator circuit coupled to receive the second PWM signal from the secondary winding and configured, upon receipt thereof, to supply a demodulated direct current (DC) voltage having a DC voltage amplitude;
• a motor driver rotatable with the secondary winding and the demodulator circuit about the first rotational axis, the motor driver coupled to receive the demodulated DC voltage from the demodulator circuit and configured, upon receipt thereof, to controllably supply motor current;
• and
• a motor comprising a stator and a rotor, the motor rotatable with the secondary winding, the demodulator circuit, and the motor driver about the first rotational axis, the stator coupled to receive the motor current from the motor driver and configured, in response thereto, to generate a torque on the rotor that causes the rotor to rotate at a rotational speed about a second rotational axis.

A control moment gyro (CMG), comprising:

• a CMG housing;
• a gimbal motor coupled to the CMG housing and including a gimbal motor component that is rotatable about a gimbal axis;
• and
• a flywheel motor control system, comprising:
• a pulse width modulator configured to supply a first pulse width modulated (PWM) signal, the first PWM signal having a duty cycle and a first amplitude;
• a rotary transformer having a primary winding and a secondary winding, the primary winding coupled to receive the PWM signal from the pulse width modulator, the secondary winding coupled to the gimbal motor component and rotatable therewith, relative to the primary winding, about the gimbal axis, the secondary winding configured to supply a second PWM signal having the duty cycle and a second amplitude;
• a demodulator circuit rotatable with the secondary winding about the gimbal axis, the demodulator circuit coupled to receive the second PWM signal from the secondary winding and configured, upon receipt thereof, to supply a demodulated direct current (DC) voltage having a DC voltage amplitude;
• a motor driver rotatable with the secondary winding and the demodulator circuit about the gimbal axis, the motor driver coupled to receive the demodulated DC voltage from the demodulator circuit and configured, upon receipt thereof, to controllably supply motor current;
• and
• a motor comprising a stator and a rotor, the motor rotatable with the secondary winding, the demodulator circuit, and the motor driver about the gimbal axis, the stator coupled to receive the motor current from the motor driver and configured, in response thereto, to generate a torque on the rotor that causes the rotor to rotate at a rotational speed about a flywheel axis.