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SINUSOIDAL VOLTAGE WITH DIRECT FOLLOW-UP CONTROL IN VOLTAGE SOURCE MODIFIED TOPOLOGY INVERTER
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| Author(s) |
W. Koczara; A. Niedzialkowski |
| Abstract |
This paper describes a sinusoidal voltage direct follow-up control method of
voltage source inverter. The inverter is considered as a sinusoidal voltage source for the
applications with constant voltage and constant or variable frequency. However the inverter
is supplied from DC voltage bus, its main structure - four transistor bridge, is switching the
DC current. This is realised by combining the buck inverter with the current source full
bridge inverter. The modified structure of system allows control voltage across output
capacitor directly by switching responding transistors. The appropriate signals are produced
in the microprocessor control block by comparison ofreference signal and feedback signal.
The accuracy of generated voltage depends on width of hysteresis band and is limited by
maximum value of transistor switching frequency. In paper is described simple two-band
follow-up control method. The equivalent circuits analysis, used for setting logical function of switching, allows build more advanced structures of control with combining of inductance
current signal. The simulation results are verified by an experimental 2kVA inverter. |
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| Filename: | Unnamed file |
| Filesize: | 535.2 KB |
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| Type |
Members Only |
| Date |
Last modified 2016-03-10 by System |
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