초록 ▼

A system for optimizing control of separately excited shunt-wound dc motors, where optimization is achieved through microprocessor-based independent PWM control of a chopper (armature) and an H-bridge (field). Connected to the armature is an armature voltage amplifier for varying the applied armatur

A system for optimizing control of separately excited shunt-wound dc motors, where optimization is achieved through microprocessor-based independent PWM control of a chopper (armature) and an H-bridge (field). Connected to the armature is an armature voltage amplifier for varying the applied armature voltage. A field voltage amplifier is also provided for determining the direction of motor rotation and varying the voltage applied to the field winding. A first sensor is connected to the motor armature in order to determine the motor rotational speed. A second sensor is connected to the armature circuit in order to determine the armature current. A third sensor is connected to the field circuit in order to determine the field current. A decoupling controller uses the motor speed and armature current information, and adjusts the armature voltage and the field voltage. An optimal controller uses the motor speed, field current and armature current information, and adjusts the armature voltage and the field voltage.

대표청구항 ▼

A method for optimizing a dc motor having separately excited armature and field windings, the steps comprising: a) reading a signal representative of desired motor speed; b) reading signals representative of actual motor speed, armature current and field current; c) providing a feedback controller f

A method for optimizing a dc motor having separately excited armature and field windings, the steps comprising: a) reading a signal representative of desired motor speed; b) reading signals representative of actual motor speed, armature current and field current; c) providing a feedback controller for generating an optimal armature current to field current ratio; d) computing optimal field current control effort as a function of signals representative of said armature current and said optimal armature current to field current ratio; and e) computing optimal armature voltage control effort as a function of signals representative of said desired motor speed and said actual motor speed. A dc motor control system for separately exciting armature and field windings of a dc motor, comprising: a) a dc motor; b) sensing means operatively connected to said dc motor for providing signals representative of actual motor speed, armature current and field current; c) a feedback controller operatively connected to said sensing means for computing an optimal armature current to field current ratio and generating a signal representative of said ratio; d) reference signal means operatively connected to said dc motor for generating a signal representative of a desired motor speed; e) first computation means operatively connected to said feedback controller and said sensing means for computing optimal field current control effort as a function of said signals representative of armature current and representative of said optimal armature current to field current ratio; and f) second computation means operatively connected to said feedback controller, said dc motor, said reference signal means and said sensing means for computing optimal armature voltage control effort as a function of said signals representative of said desired motor speed and representative of said actual motor speed.