Power generator voltage regulator based on P-channel MOSFET control

Abstract

The invention discloses a power generator voltage regulator based on P-channel MOSFET control. The power generator voltage regulator comprises an MCU main control module (1) adopting a PIC16F1829LIN type single-chip microcomputer, a P-channel MOSFET exciting current driving module (2) for controlling the exciting current of a power generator, a B+ end power supply and acquisition module (3) for providing 5V voltage for the MCU main control module and other circuit modules and for acquiring and processing the voltage, a phase signal acquisition module (4) for frequency and voltage processing, and an exciting current sampling module (5) for acquiring working current in a rotor in real time. When the P-channel MOSFET is used as a high-side driver, a bootstrap circuit is not needed, so that the circuit design is simple, the number of used electronic components is small, and the cost is reduced; the product failure risk is reduced; and the internal space of the regulator structural member is small, the layout can be simplified through a concise circuit, the layout is easier to realize, and the anti-EMC capability of the product is improved.

Description

technical field [0001] The invention relates to an automobile alternator regulator, in particular to a generator voltage regulator based on P-channel MOSFET control, and belongs to the technical field of automobile alternator regulation. Background technique [0002] In the process of using a car, the speed of the car is often unstable due to the influence of external factors and changes in internal parameters, which affects the running quality of the car, and even produces adverse consequences in severe cases. For this reason, an alternator regulator should be installed in the car's power supply line to improve and eliminate the above-mentioned linearity, and effectively control the battery regulation voltage to optimize the overall performance and battery life throughout the car's life cycle. [0003] At present, most of the power drive components of generator voltage regulators use N-channel MOSFETs. The advantages of N-channel MOSFETs are many types, wide range of choice...

AI Technical Summary

Problems solved by technology

[0003] At present, most of the power drive components of generator voltage regulators use N-channel MOSFETs. The advantages of N-channel MOSFETs are many types, wide range of choices, and low cost, but the disadvantage is that N-channel MOSFETs control circuits in high-side drive applications. It is complex and needs to build a bootstrap circuit, which will increase the cost and failure points, reduce the reliability of the product, and affect the effect of product layout in circuits with limited layout space

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