Mobile QR Code QR CODE : The Korean Institute of Power Electronics
Title Air-pressure Control of Diaphragm using Variable Frequency Current Control
Authors 林?Geun-Min Lim ; 李Dong-Hee Lee
DOI 10.6113/TKPE/2011.16.3.258
Page pp.258-265
ISSN 1229-2214
Keywords Variable Frequency Current Control; Air-pressure control; Diaphragm; Reduce the vibration; Air-pump; Fuel Cell System
Abstract This paper presents a variable frequency current control scheme for the air-pressure control of diaphragm. Differ from the conventional air-pressure control of diaphragm, the proposed method uses a single-phase inverter to control the phase current and frequency. The phase current is adjusted to keep the reference air-pressure of the diaphragm. And the current frequency is changed to reduce the mechanical vibration. In order to smooth change of the operation with a constant air-pressure, the frequency is changed according to the voltage reference from the current controller. When the phase current is satisfied to the constant air-pressure, the current frequency is increased to reduce the vibration of the diaphragm. When the reference voltage to keep the phase current is over than the set value, the current frequency is decreased to keep the air-pressure. The proposed control scheme is verified by the experimental test of a commercial diaphragm.