A vehicle power supply system, mosfet active rectifier and control method

A technology of power supply system and rectifier, applied in control system, control generator, electrical components, etc., can solve problems such as damage to automobile electrical system, and achieve the effect of solving load dumping problem, high reliability and high rectification efficiency

Active Publication Date: 2019-04-16
CHONGQING SANXIN ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Will damage the car electrical system

Method used

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  • A vehicle power supply system, mosfet active rectifier and control method
  • A vehicle power supply system, mosfet active rectifier and control method
  • A vehicle power supply system, mosfet active rectifier and control method

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Embodiment Construction

[0042] see Figure 2 to Figure 5 , a vehicle power supply system, including a generator 1, an excitation coil 2, a voltage regulator 3 and a rectifier 4; the rectifier 4 converts the three-phase alternating current of the generator into direct current, and provides a charging voltage for the battery E; the voltage regulator 3 is based on the rectifier 4 The output voltage controls the current of the excitation coil 2; wherein, the rectifier 4 adopts an active rectifier, including a three-phase bridge rectifier and a rectifier control circuit 5; the upper bridge arm of the three-phase bridge rectifier is the output bridge arm and the lower bridge arm is the grounding bridge Both arms use MOSFET tubes to rectify the first phase line U of the generator 1 and simultaneously connect the source of the fourth MOSFET tube MHU and the drain of the first MOSFET tube MLU. When the power supply terminal VDD of the voltage regulator 3 is directly connected terminal, the first phase line of...

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Abstract

The invention discloses a vehicle power supply system, an MOSFET (Metal-Oxide-Semiconductor Field Effect Transistor) active rectifier and a control method. The vehicle power supply system comprises a generator, a magnet exciting coil, a voltage regulator and a rectifier. The vehicle power supply system is characterized in that the rectifier is an active rectifier and comprises a three-phase bridge type rectifier and a rectifier control circuit; an upper-bridge arm and a lower-bridge arm of the three-phase bridge type rectifier both adopt MOSFET tube rectification; the rectifier control circuit is used for receiving signals output from the generator, used for processing the signals, and used for providing driving signals to grid electrodes of an upper-bridge arm MOSFET tube and a lower-bridge arm MOSFET tube; when the voltage of one phase of the generator is greater than the output voltage of the three-phase bridge type rectifier, the rectifier control circuit provides a driving signal to control the upper-bridge arm of the three-phase bridge type rectifier and is communicated with an MOSFET tube corresponding to the phase; when the voltage of one phase of the generator is smaller than the output voltage of the three-phase bridge type rectifier, the rectifier control circuit provides a control signal to control the upper-bridge arm of the three-phase bridge type rectifier and is dissociated from the MOSFET tube corresponding to the phase. The vehicle power supply system can be widely applied to various vehicle power supply systems.

Description

technical field [0001] The invention relates to a vehicle power supply system, in particular to a vehicle power supply system, an active rectifier and a control method. Background technique [0002] The vehicle power supply system rectifies the three-phase AC power of the generator and supplies it to the load. The output power of the vehicle generator is 500W to 2000W according to the size of the vehicle's power load. The rated voltage output by the car alternator is 12V or 24V. [0003] Existing automotive power systems such as figure 1 shown in figure 1 Among them, the power supply adopts three-phase AC excitation generator, the maximum power output of the generator is 700W ~ 2000W, and the maximum output current is 50 ~ 150A. The generator consists of an armature coil and a field coil. The armature coil outputs generator energy. The excitation coil adjusts the output power of the engine by changing the current to adjust the magnetic field strength of the generator, a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M7/219H02P9/00H02P101/45
CPCH02M7/2173H02M7/219H02P9/00H02P2101/45
Inventor 郑雷
Owner CHONGQING SANXIN ELECTRONICS
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