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Electromotor servo amplifier composed of the power MOSFET

2015-01-06 23:42  
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Electromotor servo amplifier composed of the power MOSFET
The electromotor servo amplifier composed of the power MOSFET is as shown in the figure. The MOSFET grid electrode driving boost circuit is composed of the G1-G3, the oscillation frequency is 20KHz, it is decided by the R1 and C1. The benchmark pulse generating circuit is composed of the G4 and G5, the RP1 can be used to adjust the midpoint voltage, the Ui is the output control siganl; the pulse width comparison circuit is composed of G7 and G8; the pulse stretcher circuit is composed of G9 and G10; the MOSFET grid electrode excitation circuit is composed of the VTl, VT2, VT7 and VT8, the electromotor driving circuit is composed of VT3-VT6.