3-phase digital stepper driver, AC 100V-220V power supply, maximum output current 7A/ phase, 30000 steps/ turn of the 16 subdivision mode optional, suitable for 3 phase Nema 34, 42 stepper motor, manufacturer direct sale.

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Tips: Drive circuit of stepper motors
Unipolar and bipolar driver architectures are most commonly used for stepper motors.
The unipolar drive circuit uses four transistors to drive two phases of the stepper motor. The motor configuration, as shown in Figure 1, consists of two sets of coils with center tap, and the entire motor has a total of six lines connected to the outside. Although the six-wire stepper motor is also known as unipolar stepper motor, it can actually use unipolar or bipolar drive circuit at the same time.
The drive circuit of a bipolar stepper motor is shown in Figure 2, which uses eight transistors to drive two phases. Bipolar drive circuit can also drive a four-wire or six-wire stepper motor. Although it can only use bipolar drive circuit, a four-wire motor can significantly reduce the cost of mass-production applications. The number of transistors used in drive circuits of bipolar stepper motors is twice that of transistors used in a unipolar drive circuit, in which four lower transistors are usually driven directly by a microcontroller while the upper transistor requires an upper driver circuit of higher cost.

Transistors used in bipolar drive circuits only need to withstand motor voltage. Therefore, they do not need to clamp the same circuit as unipolar drive circuits do.