THB6064H is a modelProfessional PWM chopper two-phase stepper motor drive chip. It is integrated with subdivision, attenuation mode setting, circuit regulation, CMOS power amplification and other circuits, with simple peripheral circuits can achieve high performance, multi-subdivision, large current drive circuit. Suitable for driving type 586 stepper motor.
The following introduces a more practical automobile electric door and window stepper motor drive circuit, the circuit adopts a SHINDENGEN (new electric) company launched a two-pole type stepper motor drive integrated circuit MTD2005F, especially suitable for high-power automobile electric door and window stepper motorHorns. The principle of the stepper motor and the operating voltage and driver of the drive is an important problem.
2, chopper constant current chopper drive circuit: Taking the parallel stepper motor drive as an example, it drives the stepper motor in parallel, and controls the on-state of each phase winding of the motor by changing the phase of the control voltage.
3, in the actual application site, we can quickly determine whether the stepper motor driver is normal through the following steps. 1 Check the power light First, power the driver and check that the power light is normal. For example, the drive NEM556 has a green power indicator,If the power supply is normal, this indicator should be on.
4, the subdivision technology of the stepper motor not only improves the operating accuracy, but also effectively inhibits low-frequency vibration. Taking the two-phase hybrid stepping motor with an 8° stepping Angle as an example, the fine fraction of the subdivision driver is set to 4, and the operating resolution is as high as 0.45°. However, the accuracy is also affected by the accuracy of current control, and the accuracy of different brands of subdivision drivers is different, and the larger the fine score, the more difficult the control.
Not all motors are powered on, closed-loop control of the motor needs to drive the chip, such as DC brushless motor, variable frequency motor, servo motor and so on.
Can the single chip microcomputer directly drive the stepper motor can the single chip microcomputer directly drive the stepper motor, the reason is that although the single chip microcomputer is mainly a control role, but its port is mainly a signal control role, and can not play a power drive.Stepper motor generally can not be directly driven by single-chip microcomputer, the reason is that the single-chip microcomputer port drive capacity is not enough. It doesn't have to be a dedicated driveTo do current and/or voltage expansion according to the specific parameters of the stepper motor used.
1, this is a type 35 stepper motor, you need at least like L298N plus heat sink can be driven, ULN2803 only 800mA current certainly can not drive, it is about 5-2A current.
2, the stepper motor can not be directly driven by the single chip microcomputer, the reason is the single chip microcomputerThe port driver capability is insufficient. It is not necessary to use a dedicated driver to do current and/or voltage expansion according to the specific parameters of the stepper motor used.
3, the special chip of the stepper motor is generally complete, and many also have limited current function (or constant current). Each motor drive only needs two input signals: a step pulse, a positive and negative signal to work. So the single chip computer program is simple.
4, with L298, it can also drive 2 phase 5 or 6 wire. The driving current is generally less than 2A, and it is best to apply below 5A. And you need heat sinks.Or build a H-bridge circuit with a larger power transistor as a driver. The specific power of the triode depends on the model of your stepper motor.
5, see the highest voltage, rated current, peak current, subdivision ability. L298N or A3977 will do. If the level is relatively high, you can use DSP chip to drive discrete MOSFET programming control.
1. Phase 4-wire micro stepper motor driver chip: 16-pin dual in-line. The relevant information can be searched on Baidu.
2, can be driven by EZM322, its largest subdivision can be 512 subdivision, that is, each turn needs to control the pulse 512*200=102400 pulses, so that it can be small in very low speed conditions, stepping operation is very smooth, without any vibration and beating phenomenon.
3, two-phase 4-wire stepper motor, can only use LM298, ULN2803 and ULN2003 are NPN Darlington tube, 1 chip can not form H bridge. orThe use of high-power triode to build 2H bridge to drive can also be. I didn't use the chip, but without the subdivision, the motor is shaky.
4, with L298, it can also drive 2 phase 5 or 6 wire. The driving current is generally less than 2A, and it is best to apply below 5A. And you need heat sinks. Or build a H-bridge circuit with a larger power transistor as a driver. The specific power of the triode depends on the model of your stepper motor.
5, ULN2003 Lm298 TA8435 TB6560 These can meet youOf the 2-phase 4-wire motor.
6, ULN2003, ULN2803 can not drive 2 phase 4 line stepper motor (4 phase 5 line, 4 phase 6 line, 4 phase 8 line can be driven) ULN2003, can only be injected into it current, the output is high resistance state, zhi basically no output current. It's usually used to absorb electricity.