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A motor start control method, device and air conditioner

A technology of motor speed and start command, applied in mechanical equipment, high-efficiency regulation technology, climate sustainability, etc., can solve the problems of high fan speed, high noise, overshoot of duty cycle PG motor speed, etc., to achieve the duty cycle The effect of stable change, stable operation of the fan, and stable change without sudden change

Active Publication Date: 2019-10-11
NINGBO AUX ELECTRIC
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  • Claims
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AI Technical Summary

Problems solved by technology

[0003] In the prior art, the air conditioner internal unit uses a PG motor as the fan drive motor, and the PG motor adopts a closed-loop control method. During the start-up process of the PG motor, because the speed of the PG motor is low during the start-up process, the duty cycle of the PG motor increases rapidly after the closed loop, causing the speed of the PG motor to increase. Overshoot, resulting in the problem of high fan speed and high noise when starting up during use

Method used

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  • A motor start control method, device and air conditioner
  • A motor start control method, device and air conditioner
  • A motor start control method, device and air conditioner

Examples

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no. 1 example

[0060] The embodiment of the present invention provides a motor start control method, which is used to ensure that the PG motor 5 can start smoothly. see figure 2 , is a flow chart of a method for controlling motor starting provided by an embodiment of the present invention. The motor starting control method includes:

[0061] Step S201, judging whether a startup instruction is received, if yes, execute step S202; if not, execute step S201 again.

[0062] It can be understood that when the user requires the fan 6 to run, the PG motor 5 will be run by inputting a start command to drive the fan 6 to run.

[0063] Step S202, setting the duty cycle according to the preset change rate of the duty cycle.

[0064] Specifically, the duty cycle is given based on the following formula:

[0065] θ = k 1 *t

[0066] Among them, θ is the duty cycle, k 1 is the preset duty ratio change rate, and t is the time.

[0067] Understandably, after receiving the start command, the PG motor...

no. 2 example

[0092] see Figure 5 , Figure 5A functional block diagram of a motor starting control device 7 provided by a preferred embodiment of the present invention. It should be noted that the basic principles and technical effects of the motor starting control device 7 provided in this embodiment are the same as those of the above-mentioned embodiment. corresponding content in the example. The motor start control device 7 includes a judging unit 8 , a duty ratio setting unit 9 and a parameter acquiring unit 10 .

[0093] Wherein, the judging unit 8 is used for judging whether a startup instruction is received.

[0094] It can be understood that, in an optional embodiment, the judging unit 8 may be configured to execute step S201.

[0095] The duty ratio setting unit 9 is used to set the duty ratio according to a preset duty ratio change rate when the PG motor 5 receives a starting instruction.

[0096] It can be understood that, in an optional embodiment, the duty ratio setting ...

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Abstract

The invention provides a motor starting control method, device and an air conditioner, and relates to the technical field of air conditioners. The motor starting control method and device are used forgiving the duty cycle according to the preset duty cycle change rate when the starting instruction is received, and a actual value of the rotation speed of a PG motor is obtained in real time; when the actual value of the rotating speed is greater than or equal to a preset threshold value of the rotation speed of a first motor, the current duty cycle is obtained, then the current duty cycle is taken as an initial value, and the duty cycle is given based on the threshold value of the rotation speed of the first motor, the preset target rotation change rate and an actual value of the rotation speed; and finally, when the actual value of the rotation speed is greater than or equal to the preset target rotation speed value, the duty cycle is given based on the actual value of the rotation speed and the target rotation speed value. The motor starting control method and device divide the start-up process of the PG motor into three stages, the steady change of the duty cycle of the output ofa PI regulator is ensured during the switching stage, so that motor rotation speed is enabled to be steadily changed and not abrupt, and a fan is enabled to run smoothly.

Description

technical field [0001] The invention relates to the technical field of air conditioners, in particular to a motor start control method and device and an air conditioner. Background technique [0002] With the continuous progress of the economy, the application of air conditioners is becoming more and more extensive. Since the air conditioner can bring users a comfortable experience by adjusting the temperature of the indoor environment, the air conditioner has become one of the most common household appliances. [0003] In the prior art, the air conditioner internal unit uses a PG motor as the fan drive motor, and the PG motor adopts a closed-loop control method. During the start-up process of the PG motor, due to the low speed during the start-up process, the duty cycle increases rapidly after the closed loop, resulting in the speed of the PG motor Overshoot, resulting in the problem of high fan speed and high noise when starting up during use. Contents of the invention ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F24F11/64F24F11/77
CPCF24F11/64F24F11/77Y02B30/70
Inventor 李发顺薄传海黄绍敏
Owner NINGBO AUX ELECTRIC
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