Method for controlling direct-current (DC) frequency conversion air condition compressor

An air conditioner compressor and control method technology, applied in the direction of motor generator control, electronic reversing motor control, control system, etc., can solve the problems of weak spatial saliency, no application, poor effect, etc., and achieve start-up noise Small size, good energy saving, impact-resistant effect

Inactive Publication Date: 2012-08-22
GD MIDEA AIR-CONDITIONING EQUIP CO LTD
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Problems solved by technology

[0007] The working principle of the high-frequency signal component method is to estimate the position signal of the rotor by using the spatial saliency effect of the motor rotor. When the high-frequency signal component method controls the motor

Method used

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  • Method for controlling direct-current (DC) frequency conversion air condition compressor
  • Method for controlling direct-current (DC) frequency conversion air condition compressor
  • Method for controlling direct-current (DC) frequency conversion air condition compressor

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[0024] The present invention will be further described below with reference to the drawings and embodiments.

[0025] See figure 1 , The mathematical model of the permanent magnet synchronous motor on the three-phase static coordinate system is a multi-variable, nonlinear, and strongly coupled complex system. It is often very difficult to analyze and solve the equations in this coordinate system. The vector transformation control technology uses the transformation from the stationary coordinate system to the rotating coordinate system to realize the decoupling of the excitation component and torque component in the stator current, so that the permanent magnet synchronous motor can separate the magnetic flux and the torque like a DC motor. Torque is controlled independently. Among them, the stationary coordinate system is an α, β coordinate system that forms a 90-degree right angle to each other, and the rotating coordinate system is a d, q coordinate system that forms a 90-degree...

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Abstract

The invention discloses a method for controlling a direct-current (DC) frequency conversion air condition compressor. The method comprises two position estimation methods, namely a position estimation method A and a position estimation method B. The two position estimation methods are used and changed over as follows: in the process of starting and accelerating of the compressor, the position estimation method A is adopted when the compressor starts, after being started, the compressor starts to accelerate, when the revolving speed of the compressor is less than and equal to V1, the position estimation method A is still adopted, and when the revolving speed of the compressor is greater than V1, the position estimation method B is adopted; after the compressor runs at an intermediate speed or a high speed for a period of time, demands for system cooling or heating are reduced, at the moment, the compressor starts to speed down, in the process of speeding up, the revolving speed of the compressor is greater than and equal to V2, the position estimation method B is adopted, and when the revolving speed of the compressor is less than V2, the position estimation method A is adopted, wherein V1 is greater than and equal to 360 rpm (revolutions per minute), and less than and equal to 1200 rpm, and V2 is greater than and equal to 180 rpm, and less than and equal to 600 rpm. The DC frequency conversion air condition compressor has the characteristics of flexibility in operation and good comfort.

Description

technical field [0001] The invention relates to a DC frequency conversion air conditioner, in particular to a control method for a DC frequency conversion air conditioner compressor. Background technique [0002] Due to the advantages of small size, high efficiency, wide speed range and reliable operation, permanent magnet synchronous motors are widely used in fields requiring high-performance electric drive control systems. DC inverter air conditioner has occupied a dominant position in air conditioner products at present, and the motor in the compressor, its core component, is a permanent magnet synchronous motor. What we often say about compressor control is actually to control the motor inside the compressor. [0003] In order to realize the high-performance control of the permanent magnet synchronous motor system, it is essential to know the position signal of the rotor in the permanent magnet synchronous motor. The position signal of the rotor is usually detected by a...

Claims

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Application Information

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IPC IPC(8): H02P21/14H02P21/18
Inventor 朱良红李强罗宇华付新
Owner GD MIDEA AIR-CONDITIONING EQUIP CO LTD
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