Novel brushless motor fuel pump

Abstract

The invention relates to a novel brushless motor fuel pump. In the technical scheme, a brushless motor controller is connected outside the fuel pump, namely one end of an electronic plug-in part is connected with a fuel pump motor stator, and the other end of the electronic plug-in part is connected with the brushless motor controller; a vehicle-mounted power supply is connected outside and an integrated circuit is connected inside a voltage-stabilizing and filtering circuit in the brushless motor controller; the integrated circuit is respectively connected with a peripheral resistance-capacitance circuit and a three-phase bridge inverter; and a starting circuit and three-phase feedback voltage in the integrated circuit are connected with a phase locked logic phase change circuit respectively. The defects that a position sensor has low sealing property, ages quickly, is corroded, and the like are overcome. By a counter potential reversing technology, the pump can effectively resist fuel corrosion and fuel electric conduction, can be suitable for various liquid fuels such as gasoline, methanol, ethanol and the like, has high reliability, small volume, long service life and low price, is convenient to install, reduces a motor gap, and improves motor output and motor efficiency, and the volume of a pump body is reduced.

Description

technical field [0001] The invention relates to an automobile electric fuel pump, in particular to a novel brushless motor fuel pump. Background technique [0002] Before the present invention, most of the existing brushless motor fuel pumps used position sensors to control commutation, so the position sensors must be installed inside the DC motor. The position sensor is part of the motor controller, and if it is built into the DC motor, it will induce defects such as poor sealing and fast aging, and cause various leakage problems. In addition, the use of alternative gasoline fuels and the reduction of vehicle emissions are the development direction of the "low-carbon economy", and some alternative fuels have greater corrosion on the components in the pump body and are conductive, which will also corrode the position sensor It will also produce conductivity and affect the service life of the fuel pump. Both ordinary brushed fuel pumps and generally non-corrosion brushless ...

AI Technical Summary

Problems solved by technology

The position sensor is a part of the motor controller, and if it is built into the DC motor, it will induce defects such as poor sealing and fast aging, and cause various leakage problems

In addition, the use of alternative gasoline fuels and the reduction of vehicle emissions are the development direction of the "low-carbon economy", and some alternative fuels have greater corrosion on the components in the pump body and are conductive, which will also corrode the position sensor It will also produce conductivity and affect the service life of the fuel pump

Both ordinary brushed fuel pumps and generally non-corrosion brushless fuel pumps cannot avoid the above defects

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