Power source reversal connection prevention circuit

Abstract

The invention discloses a power source reversal connection prevention circuit. The power source reversal connection prevention circuit comprises an MOS tube Q1, a resistor R1, a resistor R2, a capacitor C1 and a Zener diode D1, wherein the resistor R2 and the Zener diode D1 are connected in parallel, a negative electrode end of the Zener diode D1 of the parallel circuit is connected in series with the resistor R1, a grid electrode of the MOS tube Q1 is connected with the resistor R2 and a cathode of the Zener diode D1 of the Zener diode D1 parallel circuit, a source electrode of the MOS tube Q1 is connected with the resistor R2 and an anode of the Zener diode D1 of the Zener diode D1 parallel circuit, one end of the capacitor C1 is connected with a drain electrode of the MOS tube Q1, the other end of the capacitor C1 is connected with the other end of the resistor R1, the end of the capacitor C1 connected with the resistor R2 is connected with a positive electrode of a power source, the end of the drain electrode of the MOS tube Q1 connected with the capacitor C1 is connected with a negative electrode of the power source, and the whole circuit is conducted, if reverse connection, the power supply source can not be conducted. The power source reversal connection prevention circuit is applied to heavy-current circuits, production cost is greatly reduced, and reverse circuit connection can be effectively prevented.

Description

technical field [0001] The invention relates to the technical field of electrical control, in particular to an anti-power supply reverse connection circuit that needs to protect the reverse connection of the positive pole and the negative pole of the power supply. Background technique [0002] With the continuous improvement of the requirements for power conversion and processing in various fields of the national economy and the national defense industry, and to meet the needs of energy conservation and new energy development, power semiconductor devices, which are the core components of power conversion devices, also play an increasingly important role. Power electronic devices form different power electronic circuits with different circuit topologies to realize various power conversion and control functions. In order to enable power electronic circuits to operate stably and provide excellent electrical energy, it is necessary to drive, control and protect power electronic ...

AI Technical Summary

Problems solved by technology

At present, the reverse connection protection circuit of the power supply mostly uses a diode circuit, but when the high current is applied, the cost and performance of the diode solution cannot meet the demand. This circuit realizes the low-cost positive and negative reverse connection protection of the power supply.

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