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Brushless direct-current motor drive chip and brushless direct-current motor drive system

A brushed DC motor and drive chip technology, which is applied in the direction of single motor speed/torque control, can solve the problems of poor portability and flexibility, shorten the development cycle, reduce application difficulty and cost, and improve flexibility.

Inactive Publication Date: 2015-12-23
金学成
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art, provide a brushless DC motor drive chip and system, solve the problem that the motor control and drive of the existing motor are usually separated, and at least two chips complete their respective functions , and the technical problems of poor portability and flexibility

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  • Brushless direct-current motor drive chip and brushless direct-current motor drive system

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Embodiment Construction

[0035] Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be clear that the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0036] Such as figure 1 As shown, a brushless motor control system in the prior art usually includes a motor control chip, a gate driver chip, a power device and a position sensor. Considering reliability, application difficulty, heat dissipation, PCB space, etc., it is usually hoped that the higher the system integration, the better. In the control of small power (less than 200W) motors, usually figure 1 Some peripheral components such as the gate drive chip, power device and diode shown are packaged into one chip, wh...

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Abstract

The invention discloses a brushless direct-current motor drive chip and a brushless direct-current motor drive system, and belongs to the technical field of motor control. The chip comprises a clock generation circuit, a power management circuit, an analog-to-digital conversion circuit used for converting analog signals of motor control parameters and motor state parameters into digital signals, a position detection circuit used for converting an output signal of a position sensor into a digital signal and acquiring rotor position information and current speed, a digital processing unit used for outputting PWM signals of motor coils of all phases according to the motor rotor position and current speed, the motor control parameters, the motor state parameters and a modulation algorithm, and a gate drive circuit used for converting the PWM signals of the motor coils of all phases into high-voltage drive signals through a bootstrap circuit and outputting the high-voltage drive signals. The system comprises a position sensor, a power tube, and the brushless motor drive chip. By integrating brushless direct-current motor control and the drive chip, the degree of integration and flexibility of the chip are improved greatly.

Description

technical field [0001] The invention relates to a brushless DC motor drive chip and system, belonging to the technical field of motor control. Background technique [0002] Brushless motors use electronic commutation instead of mechanical commutation, overcome a series of problems caused by brush friction in traditional DC motors, and have the advantages of good speed regulation performance, small size, and high efficiency, so they are widely used in national economic production various fields and people's daily life. [0003] With the development of control theory, material science, microelectronics technology, etc., motor control is becoming more and more complex and intelligent. The traditional motor chip design based on analog signal processing, on the one hand, is difficult to provide highly intelligent motor control, on the other hand, the portability and flexibility of chip design are poor, resulting in a significant increase in design cycle and difficulty. In addit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P6/08
Inventor 金学成林建辉张卫新潘建斌
Owner 金学成
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