1/29/2024 0 Comments Persamaan transistor fet![]() ![]() D1 ~ D4 are freewheeling diode, through which the back EMF generated by the motor winding fades, thus protecting the power transistor TIP122 from damage.ĥ0 Ω external resistor is connected in parallel with a 200 μ F capacitor, which can improve the current pulse front of the stepper motor winding and improve the high frequency performance of the stepper motor. 200 Ω resistor in series with freewheeling diode can reduce the discharge time constant of the circuit. It makes the back edge of the current pulse in the winding steeper, and reduces the current drop time. The driving circuit of bipolar stepper motor is shown in the figure 2.īesides, the resistor improves the performance of high frequency. The two groups of phases are driven by eight transistors. ![]() ![]() Bipolar drive circuit can drive 4 - wire or 6 - wire stepper motor at the same time. 4 - wire stepper motor can only use bipolar drive circuit, which greatly reduces the cost of mass production application. ![]()
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