What is the number of stepper motors and how does the user select a few stepper motors?
The motor phase number is different, and the step angle is different. The phase angle of the two-phase motor is 1.8 degrees, the three-phase is 1.5 degrees, and the five phase is 0.72 degrees. In the absence of subdivision drive, the user mainly depends on the choice of different number of stepper motors to meet the requirements of step angle.
The phase number of the stepping motor refers to the number of coils in the motor. There are two phase, three phase, four phase and five phase stepping motors commonly used at present
The two or three and four or five phase stepping motors correspond to 2, 3, 4 and 5 sets of coils respectively.N N phase stepper motor windings, the N winding should be uniformly embedded in the stator, so the number of poles of the stator must be integer times of N, therefore, the number of steps in the rotor rotates a circle should be the integer times of N; that is to say: the 3 phase stepper motor a turn step the number is an integer multiple of 3, 4 phase stepper motor to turn the step number is an integer multiple of 4, 5 phase stepper motor to turn the step number is an integer multiple of 5; if the basic step angle of stepping motor for theta, turn the number of steps is M, stepper motor the number is N has the following relation: 9 =360/M due to the mechanical symmetry principle, M must be integer times of phase number N. According to the above analysis, we can see that the basic step angle can not take any value.There is no necessary connection between the external wiring and the phase of the stepping motor. Is determined by the actual needs of the application.For example, 8 lead line two / four phase motor, according to the requirements of use and can be connected into 4 lines of two-phase motor, can also be connected to 5 lines or 6 lines of four phase motor.
If you use a subdivision drive, the number of phases becomes meaningless and the user can change the step angle just by changing the fine fraction on the drive
