Oct 26, 2017
Stepper motor is a discrete motion device, Hybrid Stepper Motor it and modern digital control technology has an essential link. In the current domestic digital control system, the application of stepper motor is very extensive. With the advent of all-digital AC servo systems, AC servo motors are also increasingly being used in digital control systems. In order to meet the development trend of digital control, Hybrid Stepper Motor most of the motion control system using stepper motor or all-digital AC servo motor as the implementation of the motor.
Two-phase hybrid stepper motor step angle is generally 3.6 °, 1.8 °, five-phase hybrid stepper motor step angle is generally 0.72 °, 0.36 °. There are also some high-performance stepper motors with smaller step angles. Such as the four-way company for the use of stepper motor stepper motor, Hybrid Stepper Motor the step angle of 0.09 °; Germany 100 lattice company (BERGER LAHR) production of three-phase hybrid stepper motor its step angle through DIP switch is set to 1.8 °, 0.9 °, 0.72 °, 0.36 °, 0.18 °, 0.09 °, 0.072 °, 0.036 °, compatible with the two-phase and five-phase hybrid stepper motor step angle.
The accuracy of the AC servo motor is guaranteed by the rotary encoder at the rear of the motor shaft. To Panasonic all-digital AC servo motor, for example, with a standard 2500-wire encoder motor, Hybrid Stepper Motor because the drive internal use of the quadruple frequency technology, the pulse equivalent of 360 ° / 10000 = 0.036 °. For motors with 17-bit encoders, the driver receives 217 = 131072 pulse motors for one turn, ie, the pulse equivalent is 360 ° / 131072 = 9.89 seconds. Is 1/655 of the pulse equivalent of the stepper motor with step angle of 1.8 °.
Stepper motor at low speed prone to low frequency vibration phenomenon. The vibration frequency is related to the load condition and the drive performance. It is generally believed that the vibration frequency is half of the motor no-load take-off frequency. This low-frequency vibration phenomenon, which is determined by the working principle of the stepper motor, is very unfavorable to the normal operation of the machine. When the stepper motor is operating at low speed, damping technology should generally be used to overcome the low frequency vibration phenomenon, Hybrid Stepper Motor such as in the motor plus damper, or drive on the use of sub-technology.
AC servo motor running very smoothly, Hybrid Stepper Motor even at low speed will not appear when the vibration phenomenon. AC servo system with resonance suppression function, can cover the lack of mechanical rigidity, and the system has a frequency resolution function (FFT), Hybrid Stepper Motor can detect the mechanical resonance point, easy to adjust the system.