Rectifier bridge of automobile AC (alternating current) generator

Abstract

The invention discloses a rectifier bridge of an automobile AC (alternating current) generator. An MOSFET (metal oxide semiconductor field effect transistor) driving plate and a protective cover are arranged in a mounting groove at one side of a frame; an MOSFET module circuit board and radiating fins are arranged in a mounting groove at the other side of the frame; and the MOSFET module circuit board and the MOSFET driving plate are welded and connected through leads. The rectifier bridge has the advantages that the high-end MOSFET is utilized to replace a diode for converting an AC power supply into a DC (direct current) power supply, the power loss caused by the voltage drop of the diode is reduced, the size of an MOSFET is far less than that of the rectifier diode, the space of the generator is greatly saved, and the output efficiency of the generator is improved by 30% after replacement, therefore, the rectifier bridge has the functions of saving energy and reducing consumption. Meanwhile, the rectifier bridge is arranged in the generator. Compared with the external rectifier bridge, the rectifier bridge disclosed by the invention occupies small inner space of the automobile, and can directly replace the original rectifier bridge without changing the structure of the generator.

Description

technical field [0001] The invention relates to an automobile alternator rectifier bridge, belonging to automobile electronic control and mold technology. Background technique [0002] At present, almost all cars use passive diodes to convert the three-phase AC power generated by the stator winding of the generator into DC power, but the diode has the characteristics of large voltage drop, so the power loss is more, and the volume of the diode is larger . With the gradual increase of electrical devices in automobiles, the demand for power supply is also increasing, and the requirements for energy saving and consumption reduction and chemical fuel replacement technology are very urgent. [0003] At present, there are metal oxide layer semiconductor field effect transistors referred to as MOSFETs in foreign countries to replace diode rectification technology, but they are too large to be installed inside the generator. . Contents of the invention [0004] The purpose of t...

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Problems solved by technology

[0003] At present, there are metal oxide layer semiconductor field effect transistors referred to as MOSFETs in foreign countries to replace diode rectification technology, but they are too large to be installed inside the generator.

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