Single-phase matrix frequency converter and air conditioner system
A matrix inverter, single-phase technology, applied in the direction of converting AC power input to AC power output, output power conversion devices, electrical components, etc., can solve the problems affecting the service life of the inverter, reactive power and harmonic pollution, power Problems such as low power density of the conversion device
Active Publication Date: 2015-08-12
GREE ELECTRIC APPLIANCES INC
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Problems solved by technology
But the traditional frequency converter also has certain deficiencies. First, the rectification process 110 produces a large amount of reactive power and harmonic pollution, and the DC link 120 uses a large-capacity capacitor for energy storage, which makes the power density of the power conversion device low. If it is an electrolytic capacitor 121, usually also affect the service life of the frequency converter
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[0035] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention. In addition, it should be noted that, for the convenience of description, only some structures related to the present invention are shown in the drawings but not all structures.
[0036] figure 2 It is a schematic structural diagram of a single-phase matrix inverter and an air conditioning system provided by an embodiment of the present invention. The system includes: a first bridge arm 210, a second bridge arm 220, a third bridge arm 230, a fourth bridge arm 240, a fifth bridge arm 250, and a sixth bridge arm 260;
[0037] Wherein, the first end of the first bridge arm 210 is connected to the first end of the third bridge arm 230 and the first end of the fifth bridge arm 250, and connect...
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The invention discloses a single-phase matrix frequency converter and air conditioner system. The single-phase matrix frequency converter and air conditioner system comprises a first bridge arm, a second bridge arm, a third bridge arm, a fourth bridge arm, a fifth bridge arm, and a sixth bridge arm. The first end of the first bridge arm is connected with the first end of the third bridge arm and the first end of the fifth bridge arm, and is connected with a first end of a single-phase AC power supply. The second end of the first bridge arm is connected with the first end of the second bridge arm and a first end of an air condition compressor. The second end of the third bridge arm is connected with the first end of the fourth bridge arm and the second end of the air condition compressor. The second end of the fifth bridge arm is connected with the first end of the sixth bridge arm and the third end of the air condition compressor. The second end of the second bridge arm is connected with the second end of the fourth bridge arm and the second end of the sixth bridge arm, and is connected with the second end of the single-phase AC power supply. The single-phase matrix frequency converter and air conditioner system is advantageous in that by adopting the AC-AC conversion, the harmonic pollution and the reactive power caused by the DC link can be prevented, and the power density can be improved.
Description
technical field [0001] The invention relates to the field of energy saving of air conditioners, in particular to a single-phase matrix frequency converter and an air conditioner system. Background technique [0002] With the rapid development of the national economy and the accelerated pace of industrial modernization, air-conditioning energy saving has become a national key renovation and research and development project. In air-conditioning energy-saving technology, the use of single-phase matrix inverter frequency conversion speed regulation technology is an important way. [0003] figure 1 It is a schematic diagram of the traditional air conditioner inverter. The system structure adopts AC-DC-AC conversion, and diodes or thyristors are used for rectification in the process, and large-capacity capacitors are used for energy storage. However, the traditional frequency converter also has certain deficiencies. First, the rectification process 110 produces a large amount o...
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Inventor 张有林郭清风米雪涛宋泽琳钱强
Owner GREE ELECTRIC APPLIANCES INC