Bipolar stepper motor drive circuit

by:V&T Technologies     2020-01-20
The unipolar stepping motor drive circuit is shown in the following figure, which usually uses four transistors to drive the two phases of the stepping motor, so it is often called'Four-phase motor' This statement is easily understood as having four phases, but it actually has only two phases. Therefore, this term is easy to confuse people, and its exact statement should be' Double phase six-wire stepping motor' , Can be interpreted as having two phases and connected to the outside world through six lines. The bipolar stepper motor drive circuit the bipolar stepper motor drive circuit is shown in the following figure, which usually uses eight transistors to drive the two phases of the stepper motor, the number of transistors used is twice that of the unipolar stepping motor drive circuit, in which the four transistors located below are directly driven by the microcontroller, while the four transistors located above require another upper drive circuit. This kind of driving circuit not only does not need clamping circuit, but also can drive four-wire stepping motor and six-wire stepping motor at the same time. Related reading: Application of DC Brushless Servo Motor in laser welding robot, how to use stepping motor controller? TAG bipolar stepper motor
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