The principle of permanent magnet step motor
There is not much difference between the reactive step motor and the permanent magnet. I didn't have to go into the electrical machine. The new book has no idea. After you have read the books you borrowed, there should be no problem.
The characteristic of permanent magnet step motor is usually two phases, torque and volume are smaller. Stepper Angle is 7.5 ° commonly or 15 °. There are two parts of the rotor and stator: the stator is the coil, the rotor is the permanent magnet. It can also be a permanent magnet, the rotor is a coil. Here's how it works: For example, when the rotor of the motor is a permanent magnet, when the current flows through the stator winding, the stator winding produces a vector field. The magnetic field forces the rotor to rotate an Angle, making the rotor's magnetic field aligned with the stator's magnetic field. When the stator's vector field spins an Angle. The rotor also moves in an Angle with the field. Each input an electric pulse, the motor turns an Angle further. The angular displacement of the output is proportional to the number of pulses in the input, and the speed is proportional to the pulse frequency. If you change the order of the winding, the motor will reverse. The rotation of the step motor is controlled by controlling the number of pulses, the frequency and the electrical sequence of each phase winding of the motor. Permanent magnet step motor is characterized by simple mechanism, low noise, adjustable speed. It is widely used in bank, office equipment, telecommunications equipment, printers, photocopiers, fax machines, scanners, textile machinery, medical treatment, automatic control and stage lighting, building automatic control valve, monitoring and control system, electric, electric curtain, science and education instruments, air conditioning and other fields.
Just checked, the machine of the miniature printer USES 25 series of electric motor is permanent magnet, step in Angle 15 degrees. Apart, it's very rough. I used to focus on application and control, but I didn't notice. The 35 series that we use seem to be permanent magnet, too. The 42 series and the 58 series are mixed, and the two have been split several times. It seems that you want to design step motors. If I had to go that far, I wouldn't have figured it out. I'm just doing the application, and I'll show you a little bit more about how to control step motors. For your question, I suggest you look at the electrical engineering book, the electronic industry press. You're talking about eight magnetic claws in four phases, at least one pair per phase. The number of small teeth of a magnetic claw has to do with the step Angle. It seems that there is (at least some books in some books). Four phase eight beats is one way to run. This eight beats do not affect the design of the motor. In addition, based on my knowledge of the printer, most of the printer USES a hybrid step motor. The 42 series of motors that I use on this side are hybrid. It is as if permanent magnet motor, the step Angle is larger, not suitable for controlling the more delicate machine. I hope I can help you.
