Stepping motor control signal isolation circuit

Stepping motor control signal isolating circuit, stepper motor control signals have 3 (CLK, the CW, ENABLE), respectively control the Angle and speed of the motor, and can make positive and negative direction of motor, shall be connected to the chip after the optical coupling isolation. Coupling effect of light, there are two: first, prevent damage of the motor disturbance and interface board circuit; Second, the control signal for plastic. The CLK, the CW signal, choose medium speed or high speed light coupling, ensure the signal coupling is not going to happen after the lag and distortion and influence motor drive, and drive plate can meet the higher pulse frequency drive requirements. This design choose 2 slices of 6 n137 high-speed optical coupling isolation CLK, the CW, the signal transmission rate can be up to 10 MHz, 1 slice TLP521 ordinary optical coupling isolation the 3 phase induction motor ENABLE signal. Note: when the optical coupling direction and reverse output connection; Optical coupling of AC synchronous generator the forward and backward power should be fan cover a separate isolation power, otherwise can't play the role www.dongfeng-motor.com of isolation interference.