Anti-reverse-connection power supply protection circuit, power supply management system and robot

Abstract

The embodiment of the invention relates to the technical field of power supplies, and discloses an anti-reverse-connection power supply protection circuit, a power supply management system and a robot. The power supply protection circuit comprises: an NMOS transistor and a first resistor; the grid electrode of the NMOS transistor is connected with the positive electrode of a direct-current power supply through the first resistor; the drain electrode of the first resistor is connected with the negative electrode of the direct-current power supply, the source electrode of the first resistor is connected with the negative electrode of a load, the first resistor provides bias voltage for the NMOS tube, and the direct-current power supply and the load are controlled to be disconnected by applying the switching characteristic of the NMOS tube when the direct-current power supply is reversely connected. Through the mode, the embodiment of the invention can effectively prevent the reverse connection of the power supply, reduces the conduction voltage drop, and is low in cost and power consumption.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of power supplies, and in particular to a power supply protection circuit against reverse connection, a power management system and a robot. Background technique [0002] At present, with the rapid follow-up of the direction of automobile electrification, the market dominance of electric vehicles is gradually increasing, and the replacement and charging of electric vehicles require the participation of electrical contacts. In the process of electrical contact, it is inevitable that the electrical polarity is reversed. If the electrical polarity is reversed, it may cause damage to the equipment and cause accidents. [0003] At present, the most commonly used and simplest electrical anti-reverse connection technology is the positive or negative anti-reverse connection diode. When the circuit connection is correct, the circuit current can pass through the diode smoothly. When the reverse c...

AI Technical Summary

Problems solved by technology

But this method dissipates energy due to the voltage drop across the diode

In the case of the same input current, the reactive power consumption of the rectifier bridge anti-reverse circuit is twice that of the single diode anti-reverse circuit, which will generate more energy consumption

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