Compact brushless electric power steering system (EPS) controller

Abstract

The invention discloses a compact brushless electric power steering system (EPS) controller. The compact brushless EPS controller comprises a base, an upper cover and a PCB, a male buckle is arrangedon the surface of the upper cover, a female buckle is arranged on the surface of the base, and the upper cover and the base are connected in a clamped mode through the male buckle and the female buckle; four screw holes are formed in the surface of the base, four fixing holes are formed in the positions, corresponding to the screw holes, of the surface of the PCB, the PCB is fixedly mounted at thetop of the base through screws, and the surface of the base is fixedly connected with a power MOS tube; and a first connector and a second connector are fixedly connected to the bottom, close to thetwo sides, of the PCB correspondingly, and a motor driving module is further mounted on the upper surface of the PCB. According to the compact brushless EPS controller, the safety performance of the controller in the working process is improved, and the gate drive power MOS tube is further effectively protected. The larger PCB wiring space can be released in design, and the design and manufacturing costs are greatly lowered.

Description

technical field [0001] The invention relates to the technical field of automotive electronics, in particular to a compact brushless EPS controller. Background technique [0002] With the development of electric power steering system (EPS) technology, the performance of the steering system, the function of the controller and the performance of the motor have become important indicators of the electric power steering system (EPS). The motor drive module in the controller is one of the most important modules of the entire electric power steering system (EPS). The motor drive module is composed of a gate drive chip, a gate drive full-bridge circuit and a current acquisition chip. Generally, a brushed motor drive is driven by a two-phase brushed DC gate driver, and a brushless motor is driven by a three-phase brushless DC gate driver. pole driver drive. [0003] In traditional EPS controllers, the gate drive chips used in the motor drive modules are often implemented with half-...

AI Technical Summary

Problems solved by technology

Among them, the three-phase brushless DC motor drive needs three independent half-bridge drives to complete; the three-phase current acquisition of the motor requires three independent current operational amplifiers. This circuit structure not only requires higher cost, but also increases PCB board design size

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