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Motor control method and device

A technology of motor control and motor, applied in the field of motor control devices

Inactive Publication Date: 2015-02-25
RICHTEK TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies and defects of the prior art, and propose a motor control method and device, which can meet the needs of precise control of speed, low false start, and reduction of noise interference, etc.

Method used

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Embodiment Construction

[0041] The foregoing and other technical contents, features and effects of the present invention will be clearly presented in the following detailed description of a preferred embodiment with reference to the drawings. The directional terms mentioned in the following embodiments, such as: up, down, left, right, front or back, etc., are only directions referring to the attached drawings. The drawings in the present invention are all schematic, mainly intended to show the functional relationship between each device and each component, and the shapes, thicknesses and widths are not drawn to scale.

[0042] refer to figure 2 , 3 , which shows a motor control method and a signal schematic diagram provided according to a viewpoint of the present invention. According to an external control signal Sc, a motor (not shown) is started to rotate from a waiting state. This method includes: according to the external control The duty ratio of the signal Sc starts the motor (S1); judges wh...

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Abstract

The invention provides a motor control method. According to an external control signal, a motor is started to rotate from a waiting state. The method comprises the steps that the motor is started according to the duty ratio of the external control signal; whether the external control signal is noise or not is judged, and the motor is switched back to the waiting state if yes; whether the motor starts to rotate or not is judged, and the motor continues to be driven according to the duty ratio of the external control signal; when the external control signal is not noise, a first time frame is exceeded after the motor is started, and the motor does not start to rotate, the motor is switched to be started according to a preset drive signal; after the motor is started according to the preset drive signal, and a second time frame is exceeded, the motor is switched to be driven according to the duty ratio of the external control signal. The invention further provides a corresponding motor control device.

Description

technical field [0001] The present invention relates to a motor control method, in particular to a motor control method including eliminating noise and selectively increasing the signal load ratio to start the motor to rotate. The invention also provides a corresponding motor control device. Background technique [0002] refer to Figure 1A , which shows a motor control method in the prior art, which can be applied, for example, to control the speed of a fan motor. This method starts a motor (not shown) according to an external control signal Sc to achieve a corresponding speed. When the circuit receives the external control signal Sc in the form of pulse width modulation, it correspondingly generates a drive signal Sd in the form of pulse width modulation to control the speed of the motor. refer to Figure 1A and Figure 1B , since the static friction must be overcome when starting to rotate from a standstill, the pulse width modulation signal must exceed a certain duty r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P1/16
CPCH02P1/16
Inventor 纪壬弘张炜旭汪若瑜伍玉光
Owner RICHTEK TECH
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