The development of stepper motor drive technology, each technological innovation will bring several market revolution with high-end technology to lead the market.
1. Constant voltage drive
Single-voltage drive refers to the motor winding work process, only one direction voltage on the winding power supply, multiple windings alternately provide voltage. The way is a relatively old drive mode, now basically do not use.
Advantages: the circuit is simple, few components, control is also simple, the realization is relatively simple.
Disadvantages: must provide a large enough current transistor to switch processing, stepper motor running speed is relatively low, motor vibration is relatively large, heat. Since it is no longer in use, it is not described much.
2. High and low voltage drive
As a result of constant voltage drive there are many shortcomings, the further development of technology, the development of new high and low voltage drive to improve some of the shortcomings of the constant voltage drive, the principle of high and low voltage drive is, in the motor movement to the whole step when the use of high-voltage control, in the movement of a half-step when the use of low-voltage control, stopping is the use of low-pressure to control.
Advantages: high and low voltage control improves vibration and noise to a certain extent, and the concept of subdivision control 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 complex relative to the constant voltage drive, the high frequency characteristics of the transistor requirements, the motor is still relatively large vibration at low speeds, the heat is still relatively large, and now basically do not use this drive mode.
3. Self-excited constant current chopper drive
Self-excited constant current chopper drive works through the hardware design when the current reaches a certain set value when the current through the hardware will be closed, and then turned to another winding energized, another winding energized current to a fixed current, and then through the hardware will be closed, and so on and so forth, to advance the stepper motor operation.
Advantages: the noise is greatly reduced, the speed is increased to a certain extent, the performance than the first two kinds of certain improvements.
Disadvantages: the circuit design requirements are relatively high, the circuit anti-interference requirements are high, easy to cause high frequency, burned drive components, the performance requirements of the components are high.
4. Current comparison chopper drive (currently the main technology used in the market)
Current comparison chopper drive is the stepper motor winding current value into a certain proportion of the voltage, and D / A converter output preset value for comparison, the comparison results to control the power tube switch, so as to achieve the purpose of controlling the winding phase current.
Advantages: so that the motion control simulates the characteristics of the sine wave, greatly improving the performance, the speed of movement and noise are relatively small, you can use a relatively high subdivision, is the current popular control method.
Disadvantages: the circuit is more complex, the interference in the circuit is difficult to control and match the theoretical requirements, easy to produce jitter, in the control of the formation of sinusoidal peaks and valleys, which can easily lead to high-frequency interference, which in turn leads to the heating of drive components or due to the aging of the frequency is too high, which is the main reason why a lot of drivers are easy to use for more than 1 year of the main reasons for the red protection light.
5. Submerged drive
This is a new motion control technology, the technology is in the current current comparison of chopper drive technology, under the premise of overcoming the shortcomings and innovation of a new drive method. Its core technology is in the current comparison of chopper drive under the premise of increasing the driving element heat and high frequency suppression protection technology.
Advantages: both the advantages of current comparative chopper drive, heat is particularly small, long service life.
Disadvantages: a new technology, the price is relatively high, each stepping motor and driver matching requirements are relatively strict.
Post time: Aug-28-2024