REVERSIBLE DC MOTOR DRIVE INCLUDING A DC/DC CONVERTER AND FOUR QUADRANT DC/DC CONTROLLER

摘要

A reversible DC motor drive (440) includes a DC/DC converter (60) having a DC input (66,68), a first output (78) having a first pulsed DC voltage and first DC voltage value, a second output (102) having a second pulsed DC voltage and second DC voltage value, and a third output (110) having a third pulsed DC voltage and third DC voltage value. The first and second outputs (78,102) are adapted for electrical interconnection with armature terminals (138,140) of a DC motor (134,62,450), and the third output (110) is adapted for electrical interconnection with a field terminal (146) of the motor. A microprocessor routine (362) calculates motor speed from the motor armature voltage, field current and armature current. An outer control loop (246) for motor speed and two separately controllable inner control loops (250,346) for armature and field current control the DC/DC converter responsive to the calculated motor speed and a speed reference (352) in order to independently control the three DC voltage values.