TWH8751 type power integrated circuit is a new type of high voltage large current switching circuit. The whole by the input circuit, buffer put their meal of open collector darlington power output stage, and his friends with feedback loop and reducing current protection circuit, and has the strobe function. TwH87 by Vcc for + 12 v ~ + 24 v, but the actual application, the circuit of the darlington output stage (4)Can share a power supply with former level, can also according to the application need to connect the output stage alone up to hundred volts of electricity. Now in three-phase reactive stepper motor (A 3) 45 bf3For example, suggests that the constitution of the drive circuit. Drive mode adopts three-phase six runs. 45 bf3 a 3 refers to the technique index is as follows: 27 v mains voltage, static current o. 35 a, electricity way of three phase six, rated step eight 15 degrees from the Angle of 3. Stepper motor is realized by using TWH87 well type chopper drive circuit principle diagram is shown in figure 1. Diagram, crystals is general of crystal oscillator, frequency divider is divided into two road output: 600 hz output supply circular distributor, 19. The output of 53 kh supply TWH8751 for chopping. Ul, U: circular distributor, generating pulse sequence, three phase six R: and cJ reset circuit, make the one plus electric circuit was to enter the main loop. U:~U。 Of power amplification circuit, make the circular distributor of the output pulse has enough power to drive the stepper motor. the main products: stepper motor, brushless motor, servo motor, stepping motor drive, brake motor, linear motor and other kinds of models of the stepper motor, welcome to inquire. Telephone:
