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Start control method for outdoor fan

A start-up technology for outdoor fans and motors, which is applied in the direction of start-up devices, etc., which can solve the problems of unable to realize normal start-up of fans and motors, and achieve the effect of start-up control against wind

Active Publication Date: 2015-07-15
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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PUM

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Abstract

The invention relates to an outdoor fan and provides a start control method for the outdoor fan aimed at a technical problem of incapability of normally starting a motor according to current rotational speed of the motor in the prior art. The method comprises the following steps: judging a rotational direction of the motor by a system; starting the motor with a positive start control method during positive rotation of the motor; starting the motor with an upwind start control method during negative rotation of the motor. Through the start control method for the outdoor fan, the motor can be controlled to be normally started from various states under a condition that the motor is in a positive or negative rotation state before being started, so that a positive position-sensorless running state is finally achieved and upwind start control of the outdoor fan is realized. The method is suitable for controlling the outdoor fan.

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 Applications(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