Air Conditioning System

Abstract

The invention discloses an air-conditioning system including a driving system, which is located in a compressor, including a frequency converter and a control module; wherein, the control module is used to use formula I d = i dq *Kpi*sin (θ‑Δθ) calculates the d-axis corrected output current i of the inverter d ; The d-axis corrects the output current i d the i dq For the inverter at any time t 0 The combined current value of the d-axis and q-axis current vectors, Kpi is the gain value, θ is any time t 0 The phase angle, Δθ is the phase angle difference constant; the control module is used to utilize the calculation formula: i q = i dq ’*Kpi*cos (θ‑Δθ) calculates the q-axis corrected output current i of the inverter q The present invention introduces the voltage fluctuation value, and calculates the corresponding gain value according to the voltage fluctuation value, thereby correcting the output current; effectively suppressing the output current pulsation of the non-electrolytic capacitor motor drive system caused by the small capacitor of the bus bar and the non-polar capacitor, and improving the output The waveform of the current improves the load capacity of the non-electrolytic capacitor motor drive system.

Description

technical field [0001] The invention relates to the technical field of air conditioning, in particular to an air conditioning system. Background technique [0002] Most of the existing air-conditioning systems use frequency converters without electrolytic capacitors. This frequency converter without electrolytic capacitors refers to replacing the electrolytic capacitors used for energy storage on the frequency converters with film capacitors to avoid the problems of low life and high temperature of electrolytic capacitors. At the same time, it has certain economic benefits; however, after using small-capacity film capacitors instead of large-capacity electrolytic capacitors, the bus voltage fluctuation 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 frequency converters without electrolytic capacitors, hardware circuits are u...

AI Technical Summary

Problems solved by technology

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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