High-power three-phase brushless direct-current motor control module and packaging of control module

Abstract

The invention provides a three-phase brushless direct-current motor integrated circuit module integrating power, driving and control into a whole, which is used for the speed or torque control of fans, water pumps, cranes, medical devices, electric automobiles and various large, medium and small brushless direct-current motors. The three-phase brushless direct-current motor integrated circuit module comprises a logic control circuit, a power element driving circuit, power elements and an over-temperature, over-current and overvoltage protection circuit. The invention also provides a packaging method of the module, comprising a metal printed circuit board, power elements, PCBs (Printed Circuit Boards), power output pins, control pins, a plastic shell and pressing rings. The packaging method is characterized in that the metal printed circuit board is a base plate of the whole module, and the power elements are welded on the metal base plate by soldering tins and connected with the control and drive PCBs. The power output pins and the control pins are respectively welded on the PCBs by the soldering tins and penetrate through the plastic shell to form external pins of the module, and the plastic shell is pressed into the metal printed circuit base plate through the tight fit by the pressing rings for being fixed. The all pins of the module are sealed together with the plastic shell through packaging resin.

Description

technical field [0001] The invention relates to the control field of DC brushless motors. Background technique [0002] Electric motors (hereinafter referred to as motors) are the main equipment that converts electrical energy into mechanical energy, and more than 80% of the world's electrical energy-mechanical energy conversion is completed by motors. As the power source of various equipment such as fans, water pumps, compressors, and machine tools, motors are used in almost all modern industrial fields, including aerospace, military, automobiles (especially electric vehicles), metallurgy, water conservancy, petrochemical, mining, and power plants. , steel mills and other industries. [0003] An effective way to improve motor efficiency is to use high-efficiency energy-saving motors and motor control systems. At present, the motors widely used in the world mainly include DC motors (DCMotor-DCM for short), induction motors (InductionMotor-IM for short), permanent magnet mo...

AI Technical Summary

Problems solved by technology

Although the overall development of China's motor industry has been rapid in recent years, and product quality has been continuously improved, motors still have defects in terms of service life, reliability, material consumption, noise and vibration reduction, etc.

[0033] First of all, the integration level of the motor control system is not high, there are very few integrated modules, the control method adopted is relatively simple, and there are even problems in system heat dissipation

This situation has caused a series of problems in motor control products such as large volume, heavy weight, and low efficiency.

[0034] Secondly, there are very few standardized and serialized product types of motor control system manufacturers, and they are rarely able to provide comprehensive motor control solutions.

Its motor control system is not standardized in many aspects such as circuit design, control method adopted, production quality control, reliability test, etc., resulting in large fluctuations in product quality, low working stability in harsh environments, and short service life

[0035] The above reasons have caused the overall low level of the motor control system, which has led to the fact that my country's energy-saving motors cannot give full play to their high-efficiency and energy-saving features, and their actual efficiency can only reach about 85%. This also has a certain impact on the technological progress of electric products. resistance

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