I measured it with a multimeter, and found that there were two groups, of which three lines of each group were shorted together How can I use the drive?
3, bipolar stepper motor and unipolar stepper motor, is derived from a few decades ago, because the stepper motor drive circuit is more expensive, if the driving circuit for bipolar circuit, a lot more expensive than unipolar, so many years ago, a lot of unipolar stepper motors. But with the step motor drive circuit cost is getting lower and lower, coupled with the emergence of some very cheap driver chips, the application of bipolar motor more.At the same time, a bipolar motor has a high efficiency due to a positive and negative current flowing through a wire coil, and the unipolar one is less efficient because the motor only uses half of the coil for most of the time. But in some of the more stringent cost requirements, unipolar motor is still widely used.
1, unipolar stepper motor, two coils, five or six lines, which adds a tap in the middle of a coil, five lines can be regarded as the six line of the two coil and two middle line together. Because there is a tap in the middle of a coil, the current can flow in half of a coil, but at this time only half of the coil is used.2, bipolar stepper motor means: there are two coils, four lines. The current flows in the two coils in a positive and negative direction, so it is called bipolar.
The 3 short ones are the 3 leads of the 2 coils, one of which is a common point, which can be measured with a resistance gauge. The 2 of those with high resistance are made of A+, A-, and the middle point is not connected. That's all right. Again, 3 other 2 points with higher resistance are B+, B-.
4, phase number: produce different pairs of poles N, S magnetic field exciting coil logarithm. Commonly used m representation. The number of beats: a magnetic field changes periodically required pulse number or a conductive state represented by N, or a motor turned a tooth angle required pulse number to four phase motor as an example, there are four phase four operation mode is AB-BC-CD-DA-AB, four phase eight step operation mode that corresponds to a step angle: A-AB-B-BC-C-CD-D-DA-A. the pulse signal, the angular displacement of motor rotor turn with theta said. Theta =360 degrees (rotor tooth number, J* running number), take conventional two and four phases, rotor tooth as 50 teeth motor, for example. Four running step angle theta =360 / (50*4) =1.8 (commonly known as the whole step), eight shot operation stepangle 9 =360 / (50*8) =0.9 (commonly known as the half step). Location: torque motor in the state without power, locked rotor torque motor itself (caused by tooth harmonic magnetic field and mechanical error): static torque motor under the rated static electric motor function, not rotate, locking torque of motor shaft. This torque is a measure of the size of the motor (geometric size), and the driving voltage and drive power and so on. Although the static torque and electromagnetic excitation is proportional to the number of ampere turns, associated with the gap between the rotor teeth, but excessive by reducing the gap, increase the excitation to improve the static torque of ampere turns is not desirable, it will cause fever and mechanical noise of the motor.
