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HIGH PERFORMANCE DIGITAL CONTROL OF UNINTERRUPTABLE POWER SUPPLY (UPS) USING AN APPLICATION SPECIFIC INTEGRATED CIRCUIT (ASIC)
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| Author(s) |
Edwin Kiel; Walter Schumacher; Jürgen Ehrenberg; Heinz-Hermann Letas; Uwe Schrader-Hausmann |
| Abstract |
An application specific integrated circuit (ASIC) has been designed which performs all last control loops of a three phase inverter system. Two major applications are covered by this circuit: uninterruptable power supplies (UPS) and controlled mains rectifiers with sinusoidal line currents. The fully digital circuit includes seven PI-controllers, the sine generation, the interface to the A/D-converters and the PWM generation for the switching signals. lt was fabricated with CMOS gate array technology. The maximum sampling rata of the control loops amounts to 20 kHz; the delay between the measurement of the controlled quantities and the output of the switching signals is 25 μsec including 15 μsec tor the A/D conversion. The calculation time for one PI-controller is 1 μsec. The inverter controller ASIC attains a better performance than newest signalprocessors - and at a lower price. The ASIC is used in a series of static UPS systems achieving excellent dynamic behavior. |
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| Filename: | Unnamed file |
| Filesize: | 3.618 MB |
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| Type |
Members Only |
| Date |
Last modified 2019-08-15 by System |
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