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Start control method and device for outdoor blower fan of air conditioner

A technology of starting control device and outdoor fan, which is applied in the direction of motor generator/starter, starter of single multi-phase induction motor, etc., can solve the problem of increasing hardware cost and driver loss, affecting the heat dissipation effect of air conditioner heat exchanger, and making the driver reliable It can avoid problems such as reducing the performance of the software, so as to avoid the relatively long start-up time, prolong the software execution time and improve the start-up reliability.

Inactive Publication Date: 2015-11-18
GUANGDONG WELLING ELECTRIC MACHINE MFG
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the related technology, the scheme that can improve the reliability of motor starting is to add the motor opposite potential detection circuit in the driver hardware circuit, and judge the forward and reverse wind conditions by detecting the opposite potential of the motor, but this scheme increases the hardware cost and the driver At the same time, due to the addition of a part of the back EMF detection circuit, the overall reliability of the driver will also be reduced; there is also a zero-current control scheme before the motor is started on the software (that is, artificially control the current injected into the three-phase winding of the motor to 0) According to the three-phase current and voltage detected in the process of zero-current control, the rotation direction and speed of the motor rotor can be judged, and the starting control of the fan under different working conditions can be carried out on this basis. However, due to the increased Zero current control process, so it will lead to a relatively long starting time of the motor, which will affect the heat dissipation effect of the air conditioner heat exchanger

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  • Start control method and device for outdoor blower fan of air conditioner
  • Start control method and device for outdoor blower fan of air conditioner
  • Start control method and device for outdoor blower fan of air conditioner

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Embodiment Construction

[0032] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0033] The method for controlling the start of the outdoor fan in the air conditioner and the device for controlling the start of the outdoor fan in the air conditioner according to the embodiments of the present invention will be described below with reference to the accompanying drawings. Wherein, the outdoor fan in the air conditioner includes an outdoor motor and a motor driver, and the outdoor motor may be a permanent magnet synchronous motor.

[0034] First of all, the inventor of the present application has continuously te...

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Abstract

The invention discloses a start control method for an outdoor blower fan of an air conditioner. The outdoor blower fan comprises an outdoor motor and a motor driver. The start control method for the outdoor blower fan comprises the following steps of: charging a bootstrap capacitor in the motor driver by using a charging power supply after a start instruction is received; detecting the three-phase current of the outdoor motor in the bootstrap capacitor charging process; determining the rotor state of the outdoor motor according to the three-phase current of the outdoor motor in order to acquire the initial start operating condition of the outdoor blower fan; and performing start control on the outdoor blower fan according to the initial start operating condition of the outdoor blower fan. The start control method may accurately determine the initial start operating condition of the outdoor blower fan without an increase in hardware cost or prolongation in software execution time, thereby guaranteeing the heat-dissipating effect of an air-conditioning heat exchanger and improving the start reliability of the motor. The invention also discloses a start control device for the outdoor blower fan of the air conditioner.

Description

technical field [0001] The invention relates to the technical field of air conditioners, in particular to a method for starting and controlling an outdoor fan in an air conditioner and a device for starting and controlling an outdoor fan in an air conditioner. Background technique [0002] At present, for the consideration of energy saving, noise reduction and cost, PMSM (Permanent Magnet Synchronous Motor, permanent magnet synchronous motor) using SensorlessFOC (Sensorless Field Oriented Control, sensorless field oriented control) control strategy can be widely used in the outdoor fan of air conditioner. Due to the initial working conditions of the outdoor unit fan of the air conditioner, there are wind-driven forward rotation (that is, forward rotation under the action of external wind force), wind-driven reverse rotation (that is, reverse rotation under the action of external wind force) and static conditions. , in order to improve the starting reliability of the outdoor ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P1/26H02P1/40
Inventor 付彦超双波王超李忠慧赵小安龚黎明
Owner GUANGDONG WELLING ELECTRIC MACHINE MFG
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