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Direct-current motor control device, direct-current motor control method, direct-current motor and air purifier

A DC motor and control device technology, applied in the field of control, can solve problems such as the adverse effects of the power grid and the motor, the adverse consequences of equipment and the working environment, and achieve the effect of reducing the possibility of stalling

Active Publication Date: 2016-11-16
GREE ELECTRIC APPLIANCES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the motor stalls, it will not only have adverse effects on the power grid and the motor itself, but also have adverse consequences on the dragging equipment and the working environment, and even cause serious consequences

Method used

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  • Direct-current motor control device, direct-current motor control method, direct-current motor and air purifier
  • Direct-current motor control device, direct-current motor control method, direct-current motor and air purifier
  • Direct-current motor control device, direct-current motor control method, direct-current motor and air purifier

Examples

Experimental program
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Effect test

Embodiment 1

[0067] In view of the principle of the above embodiment, a specific control of a DC motor is given below through Embodiment 1:

[0068] In this embodiment, the rotational speed of the DC motor is realized by controlling the magnitude of the duty cycle PWM, and the range of the duty cycle PWM of the DC motor is 5%-75%.

[0069] The speed of the DC motor adopts the M speed measurement method (frequency measurement method). In a certain sampling period Tm, the method of using the pulse number generated by the encoder to determine the speed is called the M speed measurement method. If the encoder rotates once to generate P pulses (P is an important basis for selecting the encoder and is a constant), and m1 pulses are obtained within the preset sampling period Tm, then the motor's revolutions per minute, namely the speed nM, can be obtained for:

[0070] n M = 60 × m 1 ...

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Abstract

The invention relates to the field of control, in particular to a direct-current motor control device, a direct-current motor control method, a direct-current motor and an air purifier. The control device comprises a storage unit, a judgment unit and a control unit, wherein the storage unit is used for storing a correspondence between the operational period of a direct-current motor and the adjustment of a motor drive signal duty ratio; the judgment unit is used for determining the operational period of the direct-current motor; and the control unit is used for controlling the adjustment of the motor drive signal duty ratio according to the operational period determined by the judgment unit and the correspondence. According to the scheme provided by the invention, the rotational speed of the direct-current motor is regulated by adjusting the duty ratio PWM, and corresponding adjusting ways are given out in different periods of the direct-current motor in the adjustment process, so that the target rotational speed is reached gradually, and the possibility of stalling is reduced.

Description

technical field [0001] The invention relates to the field of control, in particular to a DC motor control device, a control method, a DC motor and an air purifier. Background technique [0002] In engineering, if the motor speed does not reach the rated speed within the designed starting time, it is considered to be stalled. If the motor stalls, it will not only have adverse effects on the power grid and the motor itself, but also have adverse consequences on the dragging equipment and the working environment, and even have serious consequences. Contents of the invention [0003] The main purpose of the present invention is to overcome the defects of the above-mentioned prior art, and provide a DC motor control device, a control method, a DC motor and an air purifier to solve the problem of effectively adjusting the speed of the DC motor to effectively achieve the target speed and avoid the occurrence of Stall. [0004] One aspect of the present invention provides a cont...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P7/00H02P7/29H02H7/085
Inventor 杨英健倪林海胡逢亮杨拓覃彬
Owner GREE ELECTRIC APPLIANCES INC
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