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An automobile air-conditioning system and a speed-regulating controller of its blower

A technology of speed control controller and air conditioner controller, which is applied in the direction of AC motor control, control system, output power conversion device, etc., can solve the problems of electromagnetic radiation of large current drive signal, electromagnetic interference of electromagnetic devices in the car, etc., and achieve reduction Electromagnetic interference, ease of implementation, effect of reducing average noise

Active Publication Date: 2017-09-26
GUANGZHOU AUTOMOBILE GROUP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the problem that when the blower is driven in the existing PWM mode, the frequent on-off of the high-current drive signal will cause electromagnetic radiation and cause electromagnetic interference to the electromagnetic devices in the car. controller

Method used

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  • An automobile air-conditioning system and a speed-regulating controller of its blower
  • An automobile air-conditioning system and a speed-regulating controller of its blower
  • An automobile air-conditioning system and a speed-regulating controller of its blower

Examples

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Effect test

Embodiment 1

[0045] This example will specifically explain the speed control controller of the blower provided by the present invention. Such as figure 2 As shown, the speed controller 2 of the blower 1 provided in this example includes the following units: a processing unit 21 and a frequency spreading drive unit 22;

[0046] The processing unit 21 is configured to receive the gear position signal sent by the air conditioner controller 3, generate a gear position control signal according to the gear position signal and send it to the spread spectrum drive unit 22; and send it to the spread spectrum drive unit 22 frequency control signal;

[0047] The spread spectrum drive unit 22 is configured to generate a PWM drive signal according to the gear position control signal and the frequency control signal, and send the PWM drive signal to the power switch Q1 driving the blower 1;

[0048] Wherein, the duty ratio of the PWM driving signal is controlled by the gear position control signal, t...

Embodiment 2

[0081] This example will specifically explain the automobile air-conditioning system provided by the present invention.

[0082] Such as Figure 5 As shown, this example provides a specific automobile air conditioning system, including air conditioning controller 3, speed controller 2, blower 1 and power switch Q1;

[0083] The blower 1 and the power switch Q1 are connected in series to the power supply; the input end of the speed controller 2 is connected to the air conditioner controller 3, and the output end is connected to the control end of the power switch Q1; wherein, The speed regulating controller 2 is the speed regulating controller 2 mentioned in the first embodiment above.

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Abstract

In order to solve the problem that when the blower is driven by the existing PWM mode, the frequent on-off of the high-current drive signal will cause electromagnetic radiation and cause electromagnetic interference to the electronic devices in the car. . Wherein the speed control controller includes the following units: the processing unit is used to receive the gear signal sent by the air conditioner controller, generate a gear control signal according to the gear signal and send it to the spread spectrum drive unit; and send the frequency to the spread spectrum drive unit Control signal; the spread spectrum drive unit is used to generate a PWM drive signal according to the gear control signal and the frequency control signal, and send the PWM drive signal to the drive switch of the blower; wherein, the duty ratio of the PWM drive signal is controlled by the gear control signal Controlled, the frequency is controlled by the frequency control signal, and swings around the center frequency in a pseudo-random signal modulation manner.

Description

technical field [0001] The invention relates to an automobile air-conditioning system, in particular to a speed-regulating controller for controlling the speed of a blower in the automobile air-conditioning system. Background technique [0002] Automobile air conditioner is the abbreviation of automobile indoor air conditioning, which is used to adjust the air parameters such as temperature, humidity, airflow speed and air cleanliness in the car, so as to provide the occupants with a fresh and comfortable environment in the car. The air conditioning system is mainly composed of compressors, blowers, condenser assemblies, evaporators, heaters, cooling pipes, warm air pipes, sensors, air conditioning controllers (that is, air conditioning ECU, ECU is the abbreviation of Electronic Control Unit) and air conditioning control panels, etc. composition. [0003] A blower is a motor-driven fan that draws air in and forces it through an evaporator or heater, cooling or heating the a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P27/08H02M1/44
Inventor 王明明辛聪杨波彭飞梁卓贤刘勇黄少堂
Owner GUANGZHOU AUTOMOBILE GROUP CO LTD
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