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DC Motor Starting Control Method, Device, Air Conditioner, and Computer-Readable Storage Medium

A DC motor and computer technology, applied in heating and ventilation control systems, heating methods, mechanical equipment, etc., can solve problems such as wind noise and poor startup, so as to avoid excessive wind noise, improve startup stability, and control The method is simple and effective

Active Publication Date: 2022-04-19
NINGBO AUX ELECTRIC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The problem solved by the present invention is that in the prior art, the air-conditioning DC motor is started with a fixed PWM duty ratio, or the fixed PWM duty ratio is increased each time to start, and when the fixed PWM duty ratio is too large, it is easy to generate Wind noise, when the fixed PWM duty cycle is too small, it is easy to have poor startup

Method used

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  • DC Motor Starting Control Method, Device, Air Conditioner, and Computer-Readable Storage Medium
  • DC Motor Starting Control Method, Device, Air Conditioner, and Computer-Readable Storage Medium

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] This embodiment provides a DC motor startup control method for air conditioners, such as figure 2 As shown, first turn on the air conditioner, and then perform the following controls:

[0070] The Vsp port starts the DC motor with the maximum voltage, and detects and records the number of speed feedback pulses at the same time; adjust the duty cycle timer value X of the PWM output according to the number of speed feedback pulses detected within the preset duration T1, where T1 is The preset duration, X is the duty cycle timer value of the PWM output, and the X value is read or adjusted by the chip.

[0071] Starting the DC motor with the maximum voltage at the Vsp port can ensure its smooth start, and then judge the fan speed according to the number of feedback pulses within the preset duration, and then determine its load, and adjust the duty cycle timer value X of the PWM output according to the load, that is The output of the duty cycle is adjusted, and the dynamic...

Embodiment 2

[0121] This embodiment discloses a DC motor starting device, which is used to implement the DC motor starting control method described in Embodiment 1.

[0122] The DC motor starting device includes:

[0123] The PWM duty cycle control module is used to output and control the duty cycle of the PWM waveform;

[0124] The pulse output module is used to output the speed feedback pulse after the motor rotates;

[0125] The pulse receiving module is used to receive and record the number of speed feedback pulses;

[0126] The calculation and judgment module is used to calculate the current X value, compare the current X value with the B value, and output the judgment result to the PWM duty cycle control module to adjust the PWM waveform duty cycle, where X is the duty cycle of the PWM output Timer value, B is the preset threshold value of the PWM output duty cycle timer value.

[0127] Through the cooperation between the above modules, when the DC motor is started, the duty cycle...

Embodiment 3

[0129] This embodiment discloses an air conditioner, which includes the starting device for a DC motor described in Embodiment 2.

[0130] For the air conditioner disclosed in this embodiment, it includes a computer-readable storage medium and a processor storing a computer program. When the computer program is read and run by the processor, the DC motor as described in Embodiment 1 is implemented. Start the control method.

[0131] The air conditioner has the same advantages as that of the DC motor start-up control method described in Embodiment 1 over the prior art, and will not be repeated here.

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Abstract

The present invention provides a DC motor starting control method, device, air conditioner and computer-readable storage medium. The control method includes: turning on the air conditioner, and then performing control according to the following steps: Step S1: Determine whether a motor start command is received, and if so, execute Step S2, if not, execute step S6; step S2: start the motor with the maximum voltage at the Vsp port, and output the speed feedback pulse after the motor rotates; step S3: detect and record the number of feedback pulses; step S4: according to the first preset duration The number of feedback pulses in T1 adjusts the duty cycle timer value X of the PWM output; step S5: continue to run for the second preset duration T2; step S6: the DC motor startup control program ends. The present invention uses the maximum voltage at the Vsp port to ensure smooth start-up of the motor at start-up, and automatically adjusts the PWM duty cycle according to the load, so as to realize the slow start of the wind speed, avoid the problems of excessive wind noise or the failure of the fan to start smoothly, and greatly improve the DC power of the air conditioner. The starting stability of the motor.

Description

technical field [0001] The present invention relates to the field of air conditioners, in particular to a method and device for starting and controlling DC motors, an air conditioner and a computer-readable storage medium. Background technique [0002] The built-in drive DC motor used in the air conditioner is generally started with a fixed PWM duty cycle after startup, and then enters closed-loop control after a certain period of time to reach the target speed set by the user. [0003] In Chinese patent CN105186932A, when the air conditioner starts, a PWM pulse with a duty ratio of P0% is sent to the DC motor, and then it is judged whether the DC motor is started. If the DC motor is not started, the duty ratio of the PWM pulse is gradually increased until the motor starts. , or gradually increase the duty cycle of the PWM pulse to P1%, and then increase the duty cycle of the PWM pulse to start the motor after a certain period of time, and start the motor by gradually approa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F24F11/30F24F11/61F24F11/64F24F11/74F24F11/88F24F13/24
CPCF24F11/30F24F11/61F24F11/64F24F11/74F24F11/88F24F13/24F24F2013/247Y02B30/70
Inventor 黄宁
Owner NINGBO AUX ELECTRIC