Compressor control apparatus and control method

一种控制装置、压缩机的技术，应用在交流电动机控制、泵控制、控制系统等方向，能够解决电压不平衡等问题

Active Publication Date: 2017-08-29
LG ELECTRONICS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0018] Therefore, an object of the present invention is a compressor control device and a control method capable of solving the problem of voltage imbalance across two capacitors of a DC link unit included in a compressor using a half-bridge inverter

Method used

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  • Compressor control apparatus and control method
  • Compressor control apparatus and control method
  • Compressor control apparatus and control method

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Embodiment Construction

[0059] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings, in which, although the embodiments are different, the same reference numerals designate the same elements throughout, and the description of the same elements of the first embodiment will be will be used in the description of different embodiments. In the following description, the use of suffixes such as 'module', 'part' or 'unit' used to indicate an element is given only for the convenience of explaining the present invention and need not have any significant meaning per se. In describing the present invention, if a detailed explanation of a related known function or construction is considered to unnecessarily deviate from the gist of the present invention, such explanation will be omitted but would be understood by those skilled in the art. The accompanying drawings of the present invention are intended to facilitate understanding of the present invention ...

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Abstract

A compressor control apparatus includes a rectifying unit configured to rectify power applied from the outside, a DC link unit configured to include a pair of capacitors and smooth the rectified voltage, an inverter unit configured to include a pair of switches and convert the smoothed DC voltage into a driving voltage of a motor according to a control signal, and a control unit configured to generate the control signal, wherein the control unit applies a DC offset voltage to the driving voltage according to a direction of a current applied to the motor on the basis of a result obtained by comparing voltages across the pair of capacitors.

Description

technical field [0001] The present invention relates to a compressor control device and a control method, and more particularly, to a compressor control device and a control method using a half-bridge inverter. Background technique [0002] In general, a compressor is a mechanical device used to compress refrigerant or other variously operated gases to increase pressure and is widely used in refrigerators and air conditioning. [0003] Compressors can be classified into: reciprocating compressors, in which a compression space into which an operating gas is drawn or discharged is formed between a piston and a cylinder, and the piston makes linear reciprocating motions in the cylinder to compress refrigerant a rotary compressor in which a compression space into which an operating gas is drawn or discharged is formed between an eccentrically rotatable roller and a cylinder, and the roller eccentrically rotates along the inner wall of the cylinder to compress refrigerant; and A...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04B35/04F04B49/06
CPCF04B35/04F04B49/06F04B2203/0202H02P27/06H02P25/032H02M7/48H02M1/14H02M5/4585
Inventor 刘载有朴成浩金奎男
Owner LG ELECTRONICS INC
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