Stepper motor phase sequence how to judge _ stepper motor in what areas of application
Stepping motor is an open-loop control motor that converts electric pulse signals into angular displacement or linear displacement. It is the main implementing element in modern digital program control systems and is widely used. . In the case of non-overloading, the speed of the motor, the position of the stop depends only on the frequency and number of pulses of the pulse signal, and is not affected by the load change. When the step driver receives a pulse signal, it drives the stepper motor. The set direction is rotated by a fixed angle, called the "step angle", and its rotation is performed step by step at a fixed angle. By controlling the number of pulses to control the amount of angular displacement, so as to achieve the purpose of accurate positioning; at the same time can control the pulse frequency to control the speed and acceleration of the motor rotation, so as to achieve the purpose of speed control.
Stepper motor is an induction motor, its working principle is to use electronic circuits, the DC power supply when the component, multi-phase timing control current, with this current for the stepper motor, stepper motor to work properly, The driver is a time-sharing power supply for the stepper motor, multi-phase timing controller.
Stepper motors are mainly divided into reaction type, permanent magnet type and hybrid type. Reactive stepper motors have poor dynamic performance, low efficiency, large heat generation, and difficulty in ensuring reliability. The permanent magnet type has good dynamic performance and large output torque, but this kind of motor has poor accuracy and large step angle. Hybrid output torque is large, dynamic performance is good, step angle is small, but the structure is complex and the cost is relatively high.
Stepper motor performance is particularly good, so its application is very extensive. Although stepper motors have been widely used, stepper motors cannot be used as conventional DC motor AC motors. Therefore, it needs to be used under the cooperation of the auxiliary system.
The use of stepper motors is becoming more and more common. In use, the phase sequence of the motor is mainly distinguished by the color and length of the lead wires. If the manual cannot be found or the marks are not clear, the wiring of the stepping motor will be very troublesome. The author through the analysis of the working principle of the stepper motor, obtained the stepping motor phase sequence and the first end of the discriminating method. The following is an example of a five-phase stepper motor (a 9-volt battery and a multimeter should be prepared).
1. Use a multimeter to block the five-phase windings of the stepper motor: A1-A2, B1-B2, C1-C2, D1-D2, E1-E2, as shown in the figure.
2. Put the multimeter to the DC micro-safety gear, and connect the tester of the multimeter to one of the phases. For example, if the phase B is on, the red pen is connected to B1, and the black pen is connected to B2.
3. Connect the battery to the remaining four phases of the stepper motor, and record the swing of the multimeter pointer at the instant of turning on. If the pointer is reversed, the battery polarity must be reversed. At the instant of four times of turning on, the pointer has two swings of the largest amplitude, indicating that the two batteries are connected by the phase of the phase B next to the phase B of the multimeter, that is, phase A and phase C.
4. Connect the multimeter to one of phase A or phase C, such as phase C. With the above method you can find the two phases next to phase C: phase B and phase D. By analogy, the five-phase sequence A, B, C, D, E can be found in order.
5. As shown in the figure, the battery is connected to phase A, and the multimeter is connected to phase B. When the battery is connected, the pointer of the multimeter is rotating forward (if the needle is reversed, the polarity of the battery should be reversed). Then, the positive terminal A1 and the multimeter are connected. The B1 end connected by the red pen is the head end. According to this method, the heads C1, D1, E1 of the remaining three phases can be determined.
Stepping motor is mainly used in what areasStepper motor is one of many motors. Although it is the same as other motors in terms of function type, it is different from other types of motors in terms of working principle or structure design. The operation form, function performance and application are applicable. The aspect and use of performance are different from other types of motors. Among them, from the application point of view, its main application is in the following aspects, and these aspects are usually not suitable for other types of motors:
Stepper motors are mainly used in the field of CNC machine tools. The reason why they are mainly used in this field is that motors do not need A/D conversion and can directly convert digital pulse signals into angular displacement. This is exactly what CNC machine tools need. , And many other types of motor can not be achieved, so the stepper motor can be said to be the most ideal actuator of CNC machine tools, naturally will be widely used in the manufacturing of CNC machine tools.
Stepper motors are mainly used in the field of CNC machine tools manufacturing, not to say that they are only applied in this area, because their use, in addition to this area, can also be used in many other machinery, such as used as an automatic feeder The motor of the motor, the universal floppy disk drive. In addition, it can also be used in printers and plotters.
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