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Motor control method and device

A motor control and motor technology, which is applied in the field of improving the motor speed control signal, and can solve problems such as noise, limited application of fan motors, and large motors

Active Publication Date: 2012-03-14
DELTA ELECTRONICS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But when using such a motor speed control signal 21 to control the speed of the motor, due to the phase conversion of the coil group 20 of the motor, for example, in Figure II At point P, the square wave will switch to different current directions in a very short time. This phenomenon will cause the motor to generate very loud noise when it is running; especially when it is applied to the fan motor, too much noise will cause Makes the application of its fan motor limited

Method used

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  • Motor control method and device
  • Motor control method and device

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Embodiment Construction

[0033] Please refer to Figure 4 , which is a circuit block diagram of a motor control device 5 according to a preferred embodiment of the present invention, wherein the motor control device 5 includes a motor drive circuit 50 and a phase signal sampling circuit (this embodiment takes a Hall detection component 51 as an example ), a coil switching circuit 52, a pulse width modulation generation circuit 53, a separation signal generation circuit 54, a first amplifier circuit 55, a first comparison circuit 56, a current detection sampling circuit 57, a second amplifier circuit 58 and a second comparison circuit 59; wherein the motor driving circuit 50, the Hall detection element 51, the pulse width modulation generating circuit 53 and the coil switching circuit 54 are not different from those in the prior art, so they will not be repeated.

[0034] The separation signal generating circuit 54 provided by the present invention is used to generate a separation signal. The first am...

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Abstract

The invention relates to a motor control method and a device thereof, including: first receiving a switching phase signal generated by the coil when detecting the rotating motor, then obtaining a separating signal; then comparing the phase signal with the separating signal and generating a first signal, then obtaining a current feedback signal equivalent to a first control signal input; finally comparing the current feedback signal with the separating signal and generating a second control signal to control the operation of the motor.

Description

technical field [0001] The present invention relates to a motor control method and device, in particular to a control method and device for improving the motor speed control signal so as to reduce noise and improve efficiency when the motor is running. Background technique [0002] Nowadays, the technology of controlling the motor has matured, and there is already a technology that uses the circuit to control the rotation of the motor. Not only that, but also this circuit can be used to change the speed of the motor, limit the speed of the motor, and even have other functions of controlling the motor. [0003] A known motor control device such as figure 1 As mentioned above, the motor control device 1 includes a motor driving circuit 10 , a Hall detection component 12 , a coil switching circuit 14 and a pulse width modulation generating circuit 16 . The Hall detection component 12 is used to detect a phase signal generated when the motor is running, wherein the phase signal...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P6/00H02P6/16
Inventor 邱进发邱俊隆蔡明熹
Owner DELTA ELECTRONICS INC