Stepper motor stepper motor power drive circuit is actually a kind of pulse expanding circuit, pulse has surely power capacity. Due to the power amplifier output direct drive motor windings, therefore, the power to expand the function of the circuit had a great influence on the operation of the stepping motor function. 1. L - single voltage driving circuitIs the motor winding VT -Shunt capacitance C on both ends of the switching transistor resistance R, made the current rise faster, so the capacitance C is also known as accelerate capacitance. Diode V in a transistor VT as stream and maintenance effect, series resistance made the current decline faster, thus make the winding current waveform along the steep. 2. The strengths of the high and low voltage driving circuit switching type high-low voltage driving circuit is: low consumption, torque, a sudden jump frequency and high working frequency. The disadvantage is that: the number of high power tube to use double, increased the drive power supply.
