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Location method and device for compressor rotor of refrigerator with inverter

A technology of compressor rotor and positioning method, applied in the direction of electronic commutator, etc., can solve the problems of high starting current, shortening compressor life, compressor starting failure, etc., to achieve stable performance of reducing noise, prolong compressor life, avoid Startup failure effect

Inactive Publication Date: 2014-12-17
HEFEI KINGHOME ELECTRICAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The defect of the prior art is that, at the initial stage, the position of the rotor is unknown, and the force applied to the rotor may be insufficient, causing the compressor to fail to start. If a large torque is applied in order to avoid failure to start, then the start of the rotor position information is determined. The current will be very large, which may cause the compressor to heat up and shake, resulting in shortened compressor life and noise. At the same time, in the control loop of the prior art, it takes multiple control cycles to locate the actual position information of the rotor. Therefore, the control is complicated

Method used

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  • Location method and device for compressor rotor of refrigerator with inverter
  • Location method and device for compressor rotor of refrigerator with inverter
  • Location method and device for compressor rotor of refrigerator with inverter

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Embodiment 1

[0077] refer to figure 1 , is a flow chart of a method for positioning the compressor rotor of an inverter refrigerator provided in Embodiment 1 of the present invention. The technical solution of this embodiment can be applied to quickly detect the position of the compressor rotor and precisely locate it during the start-up phase of the compressor of the equipment. The situation of the compressor, as well as the real-time detection of the position of the compressor rotor and the precise positioning of the compressor during the operation phase. The device may be any electronic device with a compressor, typically such as an inverter refrigerator. The refrigerator's compressor is divided into three different phases, the start-up phase, the low speed operation phase and the steady operation phase. The positioning method of the compressor rotor can detect and accurately locate the compressor rotor in different stages of the compressor in real time and quickly. The method may be ...

Embodiment 2

[0180] refer to Figure 4 , is a structural diagram of a positioning device for a compressor rotor of an inverter refrigerator provided in Embodiment 2 of the present invention. The positioning device includes: a voltage acquisition module 210 , a high frequency superposition module 220 , a bandpass filter module 230 , and an angular velocity superposition module 240 .

[0181] Among them, the obtaining voltage module 210 is used to receive the preset angular velocity signal, and obtain the corresponding preset voltage signal according to the preset angular velocity signal; the high frequency superimposing module 220 is used to inject and superimpose the high frequency voltage signal into the On the preset voltage signal, and obtain the feedback current signal according to the superimposed voltage signal; the band-pass filter module 230 is used to perform band-pass filter processing on the feedback current signal, and according to the current ripple after the band-pass filter,...

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Abstract

The invention discloses a location method and a device for a compressor rotor of a refrigerator with an inverter, and the location method comprises the steps as follows: receiving a preset angular speed signal during the starting stage, obtaining a corresponding preset voltage signal according to the preset angular speed signal; injecting and superposing a high-frequency voltage signal to the preset voltage signal and obtaining a feedback current signal according to the superposed voltage signal; performing band-pass filter processing on the feedback current signal, obtaining the actual position information and actual angular speed according to the current ripple undergone the band-pass filter processing; superposing the actual angular speed of the rotor to the preset angular speed signal for entering into the running state. The high-frequency voltage signal is injected and processed through a band-pass filter processing mode for obtaining the high-frequency feedback current signal, the actual position information of the rotor is determined according to the current ripple, the position of the rotor can be detected and positioned in real time for avoiding dead start of compressor, prolonging the service life of a compressor and reducing the noise of the refrigerator and the performance is stable.

Description

technical field [0001] The invention relates to a rotor positioning technology of a refrigerator compressor, in particular to a positioning method and a device for a frequency conversion refrigerator compressor rotor. Background technique [0002] The rotor position information of the refrigerator DC inverter compressor is a very important control parameter for the start-up performance of the refrigerator compressor and the controller of the vector inverter compressor. Since the interior of the DC inverter compressor of the entire refrigerator is filled with oil and sealed, it is difficult to install a position sensor, and the position information of the rotor can only be calculated by a sensorless algorithm. [0003] In the prior art, when controlling the start-up phase of the refrigerator, the rotor of the compressor is forcibly operated first, so that the refrigerator is positioned at a predetermined position. machine operation. The defect of the prior art is that, in t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P6/18
Inventor 周仁山
Owner HEFEI KINGHOME ELECTRICAL CO LTD
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