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Motor-drive circuit having frequency setting and correcting function and method thereof

A driving circuit and motor technology, applied in the direction of single motor speed/torque control, etc., can solve the problems of motor speed and frequency drift, achieve the effects of improving manufacturing yield, preventing drift, and maintaining operational stability

Inactive Publication Date: 2008-02-06
PROLIFIC TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the main purpose of the present invention is to utilize a kind of electric motor drive circuit, make the operation of electric motor maintain at fixed speed frequency all the time, reach the function of fixed frequency of electric motor, solve the problem that the speed frequency drift of electric motor takes place after long-term use

Method used

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  • Motor-drive circuit having frequency setting and correcting function and method thereof
  • Motor-drive circuit having frequency setting and correcting function and method thereof
  • Motor-drive circuit having frequency setting and correcting function and method thereof

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Embodiment Construction

[0087] The present invention provides a complete solution to the deficiencies of the prior art. The motor drive circuit with frequency setting and correction functions and its method are described in detail with the help of accompanying drawings. The motor drive circuit of the present invention is mainly applied to brushless DC motors, and is also suitable for controlling motors with different coil poles, such as motors with four poles, six poles, eight poles, twelve poles or higher poles. Generally speaking, the number of coil poles is directly proportional to the output horsepower of the motor, that is, the higher the number of poles, the greater the output horsepower. Specifically, the motor driving circuit can be applied to a single-coil brushless DC motor, as well as a double-coil brushless DC motor.

[0088] Please refer to FIG. 2A first, which shows a block diagram of the motor driving circuit of the present invention. The motor drive circuit at least includes a speed...

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Abstract

The invention is a frequency setting and correcting electric machine driving circuit and method, and the driving circuit at least contains: a speed control device able to receive detecting signal and speed frequency signal at the same time, forming a pulse width modulation signal able to modulate driving duty ratio in a mode of regulating pulse width, transmitting the modulation signal to a driving time sequence controller to generate a time sequence control signal so as to control the output time sequence of power driving signal of a driving device and at the same time using a detecting device to detect the motor to generate a correcting detection signal and immediately feeding the correcting detection signal back to the speed control device to form a close loop control, and then automatically correcting and setting the speed frequency of the motor.

Description

field of invention [0001] The invention relates to a motor drive circuit, in particular to a motor drive circuit with frequency setting and correction functions and a method thereof. Background technique [0002] With the rapid development of information technology and the popularization of applications in the computer industry, products such as notebook computers, scanners, power supplies, and precision electronic instruments are widely used. Generally speaking, in order to maximize the performance of the above-mentioned electronic products, it is very important to transfer heat quickly, because when the heat accumulates inside the product and cannot be dissipated in real time, the electronic components will not work normally, and even the entire electronic system will be damaged. machine. Generally, a brushless DC motor fan is used as a device for transferring heat, so that various electronic components inside the system can operate normally under an optimal temperature e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P6/06
Inventor 许家彰陈彦仲
Owner PROLIFIC TECH INC
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