An Inverter Testing System For Computer Room Air Conditioning

1831 Words 8 Pages
bstract—This paper aimed at functional requirements with CRAC (computer room air conditioning) inverter test system, and realized the test system hardware platform design, while completing the software functional design and programming algorithm. For example in Self-Made 10Kw inverter and Schneider ATV31H 2.2Kw inverter, we research on its output three-phase voltage, three-phase current for balance analysis and harmonic calculations. Practical application shows that the system can achieve efficient automated test process, and the measurement results with manual measurement are the same. Keywords—Air Conditioner Inverter; variable frequency drives (VFD); Harmonic Analysis; Balance Analysis.
I. INTRODUCTION
With the rapid development of
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Therefore promotion CRAC frequency conversion energy-saving and performance assessment has great significance for the efficiently operation of the computer room. However there exists no perfect performance test system for inverter. The test systems in article [8, 9] do not analyze the inverter output voltage, output current, harmonic and balancing.
The research goal in this paper is the performance of inverter for CRAC and the corresponding testing system; it will be introduced in the second part. The inverter in CRAC than conventional inverter should have a higher frequency stability and harmonic suppression performance, so it is necessary to evaluate the inverter’ performance: balancing test method and harmonic test algorithm for inverter testing system will be discussed in Part III. Two Type of motor participate in the experiment. One is the AC asynchronous machine which is used often in traditional CRAC compressor, and the other is AC permanent magnet synchronous motor which is use for next generation CRAC compressor. The experimental results analysis carried out in the fourth part.
II. HARDWARE REALIZTION
The CARC inverter test system hardware structure diagram is showing in Fig.1. It is composed of portable computer and inverter testing cabinet. In the side of portable computer, the portable computer is pluged with PCI9812 acquisition card, ACL7125 relay board, PCI6208 analog output board and

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