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Control method for starting the outdoor fan

An outdoor fan and motor starting technology, which is applied to the starting device and other directions, can solve the problems of unable to realize the normal starting of the fan and the normal starting of the motor, and achieve the effect of starting control against the wind.

Active Publication Date: 2017-12-08
SICHUAN CHANGHONG ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing technology cannot normally start the motor according to the current speed of the motor, and cannot realize the normal start of the fan under various speed conditions, thereby realizing the headwind start of the fan motor

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0026] In the outdoor fan startup control method in this example, the system detects the current motor speed f r To determine the direction of rotation of the motor. when f r When r When >=0, it indicates that the motor is rotating forward. When the motor is rotating in the forward direction, use the forward start control method to start the motor, and if the motor is rotating in the reverse direction, use the headwind start control method to start the motor.

[0027] Wherein, the headwind starting control method comprises:

[0028] when f 1 ≤f r <0, the system controls the start of the motor according to the positioning mode; among them, the positioning mode control is the normal start control.

[0029] when f 2 ≤f r 1 , the system starts the motor according to the reverse drag control mode. In the reverse drag control mode, the motor speed is controlled from the current speed to 0. At the same time, the d / q axis current of the motor is controlled. When the motor speed...

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Abstract

The present invention relates to an outdoor unit. Aiming at the technical problem in the prior art that the motor cannot be started normally according to the current speed of the motor, the present invention provides an outdoor fan start control method, which includes the system judging the rotation direction of the motor, and using the forward start control method to start the motor when the motor is rotating in the forward direction. When the motor rotates in the reverse direction, the motor is started by the headwind start control method. Through the above-mentioned outdoor fan start control method, it is possible to control the motor to start normally from various states under the condition of forward and reverse rotation before the motor is started, and finally reach the forward running state without a position sensor, and realize the start-up control of the outdoor fan against the wind . Suitable for outdoor unit control methods.

Description

technical field [0001] The invention relates to an outdoor machine, in particular to a start-up control method of an outdoor fan. Background technique [0002] At present, the outdoor fans of air conditioners are generally controlled by tapped motors, which have the disadvantages of low efficiency and non-continuous control of the speed. The industry has begun to use permanent magnet synchronous DC brushless motors as driving components for outdoor fans of air conditioners. [0003] However, when the outdoor unit receives the start-up command from the indoor unit, due to sea breeze and other reasons, the outdoor fan motor may be rotating in the forward or reverse direction before the air conditioner is started, and its speed may also be very different. According to the current speed of the motor, the corresponding control strategy is adopted in time to control the normal start of the motor. However, the prior art cannot normally start the motor according to the current spee...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P6/22
Inventor 陈跃朱绯涂小平刘启武高向军王声纲
Owner SICHUAN CHANGHONG ELECTRIC CO LTD