The choice of domestic chips in motor drive is not directly based on whether the chip itself "needs" a stepper motor or a servo motor, but is determined by the application scenario, performance requirements, cost and other factors of the chip to determine which type of motor to use, and is controlled by the corresponding motor driver chip.
Difference between stepper motor and servo motor
1. Stepper motor:
- It is an open-loop control element that converts electrical pulse signals into angular displacement or linear displacement.
- Advantages: simple structure, low price, convenient control, and easy to implement digital control.
- Disadvantages: There are problems such as loss of step, oscillation and stalling, and the speed response is slow, making it difficult to achieve high speed and accuracy.
2. Servo motor:
- It is a closed-loop controlled motor that can accurately control the position, speed and acceleration of the motor's rotor (or permanent magnet).
- Advantages: high precision, high speed response, high dynamic performance, suitable for occasions requiring precise position control and speed control.
- Disadvantages: relatively high price and complex control system.
The choice of domestic chips in motor drive
The choice of domestic chips in motor drive mainly depends on the following factors:
1. Application scenario:
- If the application scenario does not require high position, speed and acceleration of the motor, and cost is the main consideration, then the stepper motor may be a more economical choice. At this time, you can choose a domestic motor driver chip that matches the stepper motor.
- If the application scenario requires high precision, high speed response and high dynamic performance, then the servo motor will be a better choice.
At this time, you need to choose a domestic chip with high-performance servo control function.
2. Performance requirements:
- Choose the motor type according to the specific performance requirements of the project.
For example, in industrial automation, robots, CNC machine tools and other occasions that require high-precision position and speed control, servo motors are usually the first choice.
3. Cost considerations:
- Cost is also an important factor to consider when choosing the type of motor. On the premise of meeting the performance requirements, you should try to choose a lower cost solution.
The development of domestic motor driver chips
With the continuous advancement of domestic chip technology, many excellent motor driver chip products have emerged in China.
These chips not only have excellent performance, but also have more competitive prices, providing strong support for the development of the motor drive field.
Conclusion
In summary, whether domestic chips need stepper motors or servo motors is not determined by the chip itself, but by factors such as application scenarios, performance requirements and costs.
When choosing, you should make comprehensive considerations based on the specific situation and choose the most suitable motor type and corresponding motor driver chip.