DC fan motor control circuit and its control method

A DC fan and motor control technology, which is applied in the direction of excitation or armature current control, can solve the problem of insufficient precision of motor speed control

Active Publication Date: 2018-12-04
GREE ELECTRIC APPLIANCES INC
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Controlling the speed of the motor according to the gear position can adjust the speed of the motor according to the operating conditions to a certain extent, but it is a kind of hierarchical control. The accuracy of the speed control of the motor depends entirely on the division of the temperature range. Not accurate enough

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  • DC fan motor control circuit and its control method
  • DC fan motor control circuit and its control method
  • DC fan motor control circuit and its control method

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Embodiment Construction

[0040] In order to make the object, technical solution and advantages of the present invention clearer, the specific implementations of the DC fan motor control circuit, the DC fan motor control method and the control device of the present invention will be described below with reference to the accompanying drawings. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0041] see figure 1 , one embodiment of the DC fan motor control circuit includes a temperature detection module 001 , a main control unit 002 and a voltage control module 003 .

[0042] The temperature detection module 001 is used to detect the temperature related to the working speed of the DC fan motor and form a temperature signal. The temperature related to the operating speed of the DC fan motor includes the internal temperature of the device provided with the DC fan, the ambient temperature, and the like...

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Abstract

The invention discloses a DC fan motor control circuit and a control method of using the same. The control circuit comprises a temperature detection module, a master control unit and a voltage control module, wherein the temperature detection module is used for detecting a temperature related to a working speed of a DC fan motor and forming a temperature signal; the master control unit is connected with the temperature detection module and is used for receiving a temperature signal output by the temperature detection module and outputting a pulse width modulation signal with a corresponding duty ratio according to the temperature signal; and the voltage control module is electrically connected with the DC fan motor and is used for controlling the voltage of the DC fan motor according to the duty ratio of the pulse width modulation signal. The pulse width modulation signal is introduced and the duty ratio of the pulse width modulation signal is controlled to change according to a temperature change, so that high-accuracy adjustment is carried out on the rotating speed of the DC fan motor through the pulse width modulation signal.

Description

technical field [0001] The invention relates to the technical field of motor control, in particular to a DC fan motor control circuit and a control method thereof. Background technique [0002] The control of the DC fan motor is simple, and it only needs to provide a certain amount of DC voltage to start. It is often used as a terminal and is widely used in many industries such as industrial automation and refrigeration. For example, the cooling fan used by the controller, the common control modes of this type of motor include the power-on control mode, the temperature switch control mode, and the gear-based speed control mode. Among them, power-on start is the simplest control method, that is, after starting the controller, a DC voltage of constant amplitude is passed to the fan motor to make the motor run at a constant speed. For the temperature switch control method, it is to add a switch on the basis of power-on start, and control the on and off of the switch according...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P7/29
CPCH02P7/29
Inventor 区均灌程海珍刘亚祥经琦张东盛
Owner GREE ELECTRIC APPLIANCES INC
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