The winding during the motor winding operation, and multiple windings alternatel

Posted by purifiermotor on January 8th, 2020

The development of driver technology, from the original foreign success to the emergence of various domestic technologies, can be seen in the progress of domestic technology, but also can be seen that each technological innovation will bring several market revolutions that use technology to guide the market. 1. Constant voltage drive Single voltage drive refers to the use of only one direction of voltage to power the winding during the motor winding operation, and multiple windings alternately provide voltage. This method is an older driving method, which is basically not used High-end waterproof motor now. Advantages: simple circuit, few components, simple control, and simpler implementation. Disadvantages: a transistor with sufficient current must be provided for switching processing.

The stepper motor runs at a relatively low speed, the motor has a large vibration, and a large heat. Since it is no longer used, it will not be described further. 2. High- and low-voltage drive Due to the above-mentioned disadvantages of constant-voltage drive and further development of technology, a new high- and low-voltage drive was developed to improve some of the disadvantages of constant-voltage drive. The principle of high- and low-voltage drive is that when the motor moves to the full step Use high-voltage control, use low-voltage control when moving to half step, and use low-voltage control when stopping. Advantages: The high and low voltage control improves vibration and noise to a certain extent. The concept of subdivided control of stepper motor is proposed for the first time, and the working mode of halving the current when stopping is also proposed. Disadvantages: The circuit is relatively constant voltage driven, the requirements for the high frequency characteristics of the transistor are increased, the motor still vibrates at a low speed, and the heat is still relatively large. At present, this driving mode is basically not used. 3. Self-excited constant-current chopper drive The working principle of self-excited constant-current chopper drive is through hardware design. When the current reaches a certain set value, the current is turned off by the hardware, and then switched to another winding to be energized. When the current from the other winding reaches a certain current, it can be turned off by hardware again and so on, and the stepper motor is driven to run. Advantages:

The noise is greatly reduced, the speed is increased to a certain extent, and the performance is improved to a certain extent compared with the previous two. Disadvantages: The circuit design requirements are relatively high, the circuit anti-interference requirements are relatively high, it is easy to cause high frequency, burn out the drive components, and the component performance requirements are relatively high. 4. Current comparison chopper drive (the current technology used on the market is current comparison chopper drive, which converts the stepper motor winding current value into a certain percentage of voltage and compares it with the preset value output by the D / A converter. As a result, the switching of the power tube is controlled to achieve the purpose of controlling the winding phase current. Advantages: The motion control simulates the characteristics of a sine wave, which greatly improves the performance, the movement speed and noise are relatively small, and a higher subdivision can be used. Popular control methods. Disadvantages: The circuit is more complicated, it is difficult to control the interference in the circuit in accordance with the theoretical requirements, and it is easy to generate jitter. The peaks and troughs of the sine wave formed in the control are likely to cause high-frequency interference, which may cause the heating of the driving element or Due to the high frequency and aging, this is also the main reason why many drivers are prone to red light protection when they are used for more than 1 year. 5. Submersible drive This is a brand new motion control technology. Under the premise of wave drive technology, one of the innovative A new driving method. Its core technology is to increase the heating of the driving element and high-frequency suppression protection technology on the premise of current chopper driving. Advantages: It has the advantages of current chopper driving, especially small heat generation and long service life. Longer. Disadvantages: new technology, relatively high price, at present, each stepper motor and driver matching requirements are relatively strict.