Frequency conversion air conditioner controlling method and control system of frequency conversion air conditioner

Abstract

The invention discloses a frequency conversion air conditioner controlling method. The method comprises the following steps of: receiving a command sent by a user; controlling a frequency conversion air conditioner to switch operation modes according to the command sent by the user; when the frequency conversion air conditioner is switched into the low-power operation mode, acquiring a d-shaft starting reference current and a q-shaft starting reference current of a compressor motor in the frequency conversion air conditioner according to a generated rotation speed command and a mode zone bit; and controlling the compressor motor according to the d-shaft starting reference current and the q-shaft starting reference current. By using the controlling method, when the frequency conversion air conditioner is switched into the low-power operation mode, the output power of the compressor motor can be minimized by adjusting the rotation speed command, the d-shaft starting reference current and the q-shaft starting reference current, so that aims of reducing the power consumption of the frequency conversion air conditioner and saving electricity are achieved. The invention also discloses a control system of the frequency conversion air conditioner.

Description

technical field [0001] The invention relates to the technical field of frequency conversion air conditioners, in particular to a control method of frequency conversion air conditioners and a control system of frequency conversion air conditioners. Background technique [0002] Reducing power consumption is the common goal of white goods companies. Many companies have set energy-saving modes in their air conditioners, also known as economical modes or low-power modes. This mode utilizes the principle of low suction and exhaust pressure and low power consumption when the compressor motor operates at low frequency, and reduces the operating frequency of the compressor motor through frequency conversion control technology to achieve the purpose of energy saving. [0003] Since the compressor motor of the inverter air conditioner cannot be equipped with a position / speed sensor, a sensorless algorithm must be used to estimate the speed or position, and this observation algorithm w...

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Problems solved by technology

[0003] Since the compressor motor of the inverter air conditioner cannot be equipped with a position / speed sensor, a sensorless algorithm must be used to estimate the speed or position, and this observation algorithm will be subject to many restrictions when the inverter air conditioner is running at low frequency

Therefore, the speed open-loop control method is generally adopted when the inverter air conditioner operates at low frequency, which can make the compressor motor run stably at low frequency and reduce the power consumption of the inverter air conditioner. However, the current speed open-loop control method Neither is the optimal power consumption reduction control method, so it is necessary to improve the low power consumption control technology of the inverter air conditioner

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