Design of Integrated Intelligent Contactor Control Module with Function of Voltage Drop Resistance

Based on dsPIC33F series microcontroller and the full bridge drive circuit built by BridgeSwitch1267C integrated half-bridge chip, this paper designs an integrated intelligent contactor controller with the function of voltage drop resistance: The volume and cost of the control module are further reduced by reusing the rectifier output voltage regulator capacitor as a backup power supply; With the intelligent control strategy of flux closed-loop starting, silent energy saving reliable holding and negative pressure rapid breaking, the control module not only has the function of resisting voltage drop, but also takes into account the dynamic performance of contact bounce suppression, noise elimination and arc erosion reduction; By controlling the drive circuit alone, the control module can gently switch among starting, normal holding, voltage drop resistance holding and breaking, which reducing the coil excitation loop and increasing the reliability of the control module.