Stepper motor drives the development of technology, from the original foreign outshine others in all kinds of domestic technology, you can see the progress of domestic technology, also it can be seen at the same time, each new technology innovation brings several techniques to guide the market revolution. 1, the constant voltage driver single voltage driver is to point to in the working process of the motor winding, use only one direction for winding the power supply voltage, multiple winding alternating voltage. The way is a way of older drivers, basic need not now. Advantage: the circuit is simple, less component, control is simple, to implement simple faults: triode must provide enough current to switch handle, stepper motor speed is lower, the motor vibration is larger, fever. Because is no longer in use, so not much description. Above 2, high and low voltage driver due to the constant voltage driver exist many drawbacks, the further development of technology, the development of new high and low voltage driver to improve the constant voltage driver part of faults, the principle of high and low voltage driver is, at the time of step motor movement to the whole using high pressure control, in the movement to the half step when using low pressure control, stop is also used in low pressure to control. Advantages: high and low voltage control in some extent, improved the vibration and noise, * time puts forward the concept of subdivided control stepping motor, and also puts forward the stops the operation mode of the current in half. Disadvantages: complex circuit is relatively constant voltage driver, improve frequency characteristic of triode requirements, motor at low speed vibration is larger, still fever is still relatively large, now basically do not use this kind of drive mode. 3, self-excited constant current chopper driver self-excited constant current chopper driver's working principle is through hardware design when the current reaches a certain value through hardware will shut down the current, and then converted to electricity, another winding another winding electric current to a fixed current, but also through hardware to shut it down, so repeatedly, advancing step motor running. Advantages: less noise, rotating speed to some extent, raised, performance than the previous two have certain to improve. Weakness: to the circuit design request is higher, to the anti-interference circuit requirement is higher, easy to cause high frequency, burn out driving element, the element performance requirements are higher. 4, current chopping driver (On the market at present mainly adopts the technology of current chopping driver is the stepper motor winding current value is converted into A certain percentage of the voltage, and the comparison to the D/A converter output preset, compare the results to control the switch of power tube, so as to achieve the purpose of the control winding current. Advantages: make the characteristics of the movement control simulation sine wave, greatly improve the performance, speed and noise is small, can use higher segmentation, is the current popular control method. Weakness: the circuit is more complex, the circuit is difficult to control and the theory of interference fit requirement, the prone to jitter, formed in the control of sine wave peaks and troughs, easily lead to the high frequency interference, resulting in driving element fever or aging due to high frequency, which is easy to appear when a lot of drive to use more than a year the main reason for the red light protection. 5 into type driving, and this is a new kind of motion control technology, the technology is in the current under the premise of chopper drive technology, to overcome the shortcomings of these methods and innovation of a new driver. Its core technology is in the current chopping driver under the premise of increasing the driving element heating and high frequency suppression protection technology. Advantages: comparison with current chopping driver, the advantages of fever small, long service life. Weakness: the new technology, the price is higher, at present each step motor and drive is relatively strict matching.
