Automobile engine cooling fan control system based on four-phase double-wire winding brushless DC motor

Abstract

The invention relates to an automobile engine cooling fan control system based on a four-phase double-wire winding brushless DC motor. The automobile engine cooling fan control system comprises the four-phase double-wire winding brushless DC motor, a microcontroller, and a drive module, a communication module, simulated signal detection, a fault secure circuit, a PC machine and a power supply module connected with the microcontroller. An output control signal of the microcontroller is connected to the motor through the drive module so as to control the motor. The simulated signal detection is connected with the motor and detects a back electromotive force signal of the motor; and then a simulated detection circuit transmits the detection results to the microcontroller so as to form a detection loop. The fault secure circuit is connected with the simulated signal detection circuit and the microcontroller, and the microcontroller is operated according to a relevant output signal of the detection circuit so as to protect the system. The power supply module is connected with the microcontroller and supplies a working voltage. The microcontroller is connected with the PC machine through the communication module. The control proposal of the invention has the advantages of low cost, high efficiency and high reliability, and is an optimal solution for the occasions requiring high reliability such as the field of automobile application.

Description

technical field [0001] The invention relates to an automobile engine cooling fan control system based on a four-phase two-wire winding brushless DC motor. Background technique [0002] The concept of the automobile engine cooling fan control system first appeared in the U.S. Patent Document (Patent No. US4257554) in 1981. This patent proposed for the first time to replace the cooling fan driven by the engine crankshaft with an electronically controlled cooling fan. Since then, the automotive engine cooling fan has experienced a development process from simple relay control to complex MCU and software algorithm control, especially the introduction of PWM technology, which has truly realized the real-time control of the engine ECU on the cooling fan speed, making the fan The rotational speed and working mode and the temperature running state of the engine are completely operated according to a certain model. [0003] DC motors are widely used, and for electric vehicles with v...

AI Technical Summary

Problems solved by technology

However, the disadvantage of the half-wave circuit is that the motor utilization is lower compared to the full-bridge circuit

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