When developing stepper motor controllers, do you often face the following dilemmas? How do you select the MOSFET for the stepper motor driver? Are there good domestic MOSFET alternatives available on the market right now? Will a poor choice result in a substandard product?
First, understand the basics of stepper motors and their drivers.
What is a stepper motor?
A stepper motor is a type of electric motor that converts electrical pulse signals into corresponding angular or linear displacement. For each input pulse signal, the rotor rotates by an angle or moves forward one step. The output angular or linear displacement is proportional to the number of input pulses, and the rotational speed is proportional to the pulse frequency. Therefore, stepper motors are also called pulse motors. Based on rotor type, they can be classified into reactive, permanent magnet, and hybrid types, each with its own unique advantages and disadvantages.
What is a stepper motor driver?
A stepper motor driver is a power amplifier that drives a stepper motor. It receives control signals from a controller (such as a PLC or microcontroller) and controls the stepper motor to rotate through the corresponding angle or number of steps. The driver mainly consists of two parts: a ring distributor and a power amplifier. The MOSFETs are usually in an H-bridge structure (4 MOSFETs or double the number) to ensure the effective operation of the stepper motor.
II. Pain Points in Selecting Stepper Motor Drivers
In the process of developing a stepper motor controller, you may encounter the following pain points:
Unsure how to choose: With so many options on the market, from reactive and permanent magnet to hybrid motors, selecting the right driver can be a headache.
Concerns about the quality of domestic alternatives: Most R&D personnel are accustomed to choosing imported field-effect transistors (MOSFETs), and even if the price is high, they dare not easily try domestic alternatives.
Fear of selecting poor-quality products: In the face of fierce market competition, even a slight mistake in selection may lead to project failure and increased costs.
