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A stepper motor controller is a device that controls motor operation through integrated circuits, but it is not an independent instrument device. The driving of stepper motors can be divided into unipolar stepper motor driving circuits and bipolar stepper motor driving circuits. What are the differences between these two driving circuits? Let's take a look at the detailed explanation below

Single pole stepper motor drive circuit

Four transistors are used to drive the two phases of the stepper motor. It is worth noting that it has two phases and is connected to the outside world through six wires, so it is also known as the "dual phase six wire stepper motor"

Bipolar stepper motor drive circuit

Compared to the unipolar stepper motor drive circuit, which has twice as many transistors, eight transistors are used to drive the two phases of the stepper motor. The four transistors located below are directly driven by the microcontroller, while the four transistors located above require an additional upper drive circuit to simultaneously drive the four wire stepper motor and the six wire stepper motor