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Brushless DC motor phase conversion control method and brushless DC motor control system

A brushless DC motor and control system technology, applied in the direction of electronic commutators, etc., can solve problems such as the inability to quickly complete complex calculations, MCU computing capacity limitations, etc., to reduce the amount of data processing and calculation difficulty, free up space and computing power Effect

Active Publication Date: 2016-07-13
SHENZHEN TOPBAND CO LTD
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AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is that, in view of the limitation of MCU computing power, it is impossible to quickly complete complex calculations, solve the defect of driving the operation of ultra-high-speed motors, and provide a commutation control method for DC brushless motors, DC brushless motor control system

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  • Brushless DC motor phase conversion control method and brushless DC motor control system

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Embodiment Construction

[0033] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0034] figure 1 A schematic diagram of the principle of a DC brushless motor control system is shown. The DC brushless motor control system includes: DC brushless motor 1 , control circuit 2 , drive and power circuit 3 , rotor position detection circuit 4 , DC / DC power conversion circuit 5 , and overcurrent protection circuit 6 .

[0035] Wherein, the DC brushless motor 1 is a three-phase DC brushless non-inductive motor. The control circuit 2 is connected with the brushless DC motor 1 through the drive and power circuit 3 for outputting control signals to the drive and power circuit ...

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Abstract

The invention relates to a brushless DC motor phase conversion control method and a brushless DC motor control system. The method comprises the following steps: S1, when the motor starts to enter a constant speed state, phase conversion time counting increase and zero-crossing time counting increase are carried out starting from any phase conversion point; S2, during the counting process, whether the back electromotive force of a non-conduction phase of the motor achieves a zero-crossing point is detected, and if yes, zero-crossing time counting increase is stopped, and zero-crossing time counting decrease is carried out; and S3, whether the calculation value for the zero-crossing time counting is smaller than the calculation value for phase conversion time counting is judged, and if yes, a next phase conversion point arrives. According to the technical scheme of the invention, the phase conversion point is determined through two-way counting, the data processing amount and the calculation difficulty for phase conversion control are reduced, the space and the calculation ability of an MCU are released, and ultra high rotation speed driving can be realized on the rotation speed of the brushless DC motor.

Description

technical field [0001] The invention relates to the field of DC brushless motors, more specifically, to a commutation control method of DC brushless motors and a DC brushless motor control system. Background technique [0002] With the development of technology, the development trend of motor control makes customers have higher and higher requirements for the performance of motor control MCU (micro control unit or single chip microcomputer), FPGA (field programmable logic gate array) and DSP (digital signal processing), MCU There are more and more functions, and the computing power is becoming more and more powerful. At the same time, motors and motor control have been developing in the direction of high efficiency, miniaturization, low cost, high compatibility, and simplified structure. 8-bit MCU has a wide range of applications in the field of DC brushless motor control because of its low price and stable performance. However, 8-bit MCUs have encountered bottlenecks in m...

Claims

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Application Information

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IPC IPC(8): H02P6/14
CPCH02P6/14
Inventor 冷加文豪陈勇钢
Owner SHENZHEN TOPBAND CO LTD
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