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Brushless motor driving circuit and control method

A drive circuit, brushless motor technology, applied in electronic commutation motor control, single motor speed/torque control, control system, etc., to increase sensitivity, control smoothness, and ensure safe operation.

Inactive Publication Date: 2018-02-23
DONGGUAN YINYAN ELECTRICAL SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of existing aircraft models in the low-altitude field, the purpose of the present invention is to provide a driving circuit and a control method for a brush motor. The driving circuit and a control method for a brush motor give the motor different functions according to externally input control signals. At the same time, monitor the back EMF of the motor to ensure the normal operation of the motor, and also have protection functions such as voltage detection and temperature detection to ensure safe and reliable operation of the motor without deterioration tendency, so as to solve the problems raised in the above background technology

Method used

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  • Brushless motor driving circuit and control method

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Embodiment 1

[0035] Based on the driving circuit of the brushless motor described above, a method for controlling the brushless motor is provided, including the following steps:

[0036] The first step: obtain the external input signal; obtain the external control signal of the motor drive equipment, judge the range of the frequency by detecting the frequency of the signal, obtain the category of the signal, and divide the signal into different types for subsequent processing , by judging the type of external input control signal, different responses can be made, and different types of control signals can be converted into the same algorithm for processing;

[0037] Step 2: Determine whether the voltage and temperature are normal; monitor the temperature of the ESC through the temperature monitor that comes with the MCU. After reaching a certain value, the MCU will take measures such as reducing the driving PWM duty cycle; monitor the power supply voltage at any time through the battery det...

Embodiment 2

[0041] see Figure 4 , based on the first embodiment above, this embodiment also provides a motor drive device, the motor drive device includes: a signal acquisition module, a control module, a drive motor and a back electromotive force detection module, the signal acquisition module is used to obtain the motor The control signal of the drive equipment; the control module converts the detected signal into the driving PWM for the brushless ESC, and then sends it to the motor drive circuit. After certain processing, the motor is driven. The back electromotive force detection module is used to detect and control the back electromotive force of the motor The commutation of the motor to make the motor run normally;

[0042] The first step: the process of obtaining and identifying multiple signal types by the signal acquisition module is: acquiring the frequency of the external control signal, judging the category of the control signal according to the frequency of the external cont...

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Abstract

The invention discloses a brushless motor driving circuit and a control method. The brushless motor driving circuit comprises a driving circuit module, a power circuit module, a signal detection module and a BEMF detection module, wherein the driving circuit module is used for controlling a power MOS; the power circuit module is used for providing power for driving of the motor; the signal detection module is used for controlling signal recognition; and the BEMF detection module is used for monitoring the working state of motor driving equipment. The motor driving equipment and the control method thereof can give different operation speeds for the motor, the temperature of the BEMF and the equipment is monitored at the same time, and the equipment can be ensured to operate safely; and hardware and software are combined efficiently to enable motor control to be more smooth, heating of the equipment is reduced to a great degree, the sensitivity of the equipment is increased, the operation hand feeling is ensured greatly, and the entertainment and the practicability are greatly improved.

Description

technical field [0001] The invention relates to the technical field of aeromodelling power systems, in particular to a driving circuit and a control method of a brushless motor. The control method of the brushless motor is convenient for controlling the running speed of the motor and can ensure safe and reliable operation of the motor. Background technique [0002] The large-scale use of domestic aircraft models has just started, and the market potential is huge. With the gradual implementation of many regulations such as UAV spectrum formulation and flight test standards, the autonomy of aircraft models in the low-altitude field will be greatly increased; Deepening, the application of this kind of products in remote sensing surveying and mapping, border and sea defense, forest fire prevention, pipeline inspection, police law enforcement, etc. has begun and is showing a trend of rapid development. ; A convenient, safe, high-performance power scheme is urgently needed, and th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P6/08H02P6/182
CPCH02P6/08H02P6/182
Inventor 杨霞刘军
Owner DONGGUAN YINYAN ELECTRICAL SCI & TECH CO LTD