Air Conditioning System
An air-conditioning system and related technology, applied in the direction of output power conversion devices, electrical components, etc., can solve problems such as the increase in the size of the frequency converter substrate, the increase in the system failure rate, and the decline in the overall reliability of the frequency converter, so as to suppress the output current pulsation , improve the load capacity, and the effect of good control effect
Active Publication Date: 2022-07-08
QINGDAO HISENSE HITACHI AIR CONDITIONING SYST
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However, due to the additional addition of some hardware circuits in this method, the size of the inverter substrate increases and the production cost increases; at the same time, the addition of new hardware circuits will lead to an increase in the system failure rate and a decrease in the overall reliability of the inverter, which will affect the quality of the air conditioning system.
[0004] In summary, it is now necessary to design an air conditioning system to solve the current pulsation problem of the electrolytic capacitor inverter in the prior art
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[0039] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.
[0040] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", The orientation or positional relationship indicated by "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the des...
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The invention discloses an air conditioning system including a drive system, which is located in a compressor and includes a frequency converter and a control module; wherein, the control module is used to calculate the q-axis corrected output current i of the frequency converter q ; The q-axis corrects the output current i q The calculation formula is: i q =i q '+α*Kpi; i q ' is the q-axis output current of the inverter, α is the coefficient, and Kpi is the gain value; the control module is also used to collect the bus voltage detection value U in real time dc , and the detection period is T. In the present invention, the output current of the frequency converter is used as the control quantity, and the corresponding gain value is calculated according to the detected value of the bus voltage, which also has a good control effect when the motor running state changes continuously; As a result, the output current of the electrolytic capacitor-free motor drive system is pulsated, the waveform of the output current is improved, and the load capacity of the electrolytic capacitor-free motor drive system is improved.
Description
technical field [0001] The present invention relates to the technical field of air conditioning, and in particular, to an air conditioning system. Background technique [0002] Most of the existing air-conditioning systems use non-electrolytic capacitor inverters. The non-electrolytic capacitor inverter refers to replacing the electrolytic capacitors used for energy storage on the inverter with film capacitors to avoid the problems of low life and temperature rise of electrolytic capacitors. At the same time, it has certain economic benefits; however, when a small-capacity film capacitor is used instead of a large-capacity electrolytic capacitor, the voltage fluctuation of the busbar of the inverter will cause periodic pulsation of the motor current. This problem has a certain impact on the load capacity and reliability of the inverter. [0003] At present, in the application of non-electrolytic capacitor inverters, hardware circuits are usually used to sample the current a...
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IPC IPC(8): H02M1/12
CPCH02M1/12
Inventor 王秋晨李希志徐鹏洋李文阳
Owner QINGDAO HISENSE HITACHI AIR CONDITIONING SYST