IMPROVED SWITCHED RELUCTANCE MOTOR DRIVE CONTROL SYSTEM

摘要

A current measuring apparatus measures current flowing through a phase winding of a switched reluctance motor while dissipating very little power. The apparatus includes a control for controlling the current flowing through the winding. A gate is operatively connected to the control for switching the current flowing through the winding. The arrangement is such that in a first mode of the gate, the current flows through the phase winding. In a second mode of the gate, flow of the current through the winding is inhibited. The gate includes a sense means for sensing a fraction of the current when the gate is in the first mode thereof. A resistor of relatively high resistance is electrically connected in series with the sense means such that a voltage drop occurs across the resistor when the gate is in the first mode. The voltage drop signal is fed back to the control so that dependent on the signal, the current flowing through the phase winding of the motor is maintained in order to maximize motor efficiency.