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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Ermis, M. Calir, Z. Cadirci, I. Zenginobuz, G. Tezcan, H. |
| Copyright Year | 2000 |
| Description | Author affiliation: TUBITAK-METU Inf. Technol. & Electron. Res. Inst., Ankara, Turkey (Ermis, M.) |
| Abstract | Self-excitation of induction motors compensated by permanently-connected capacitors is investigated in this paper. Theoretical analyses of self-excitation phenomenon are carried out by using some simplified equivalent circuits, and a hybrid mathematical model in ABC/dq axes, respectively in steady-state, and transient-state. An unusual operating condition of water pumping stations is reported, in which water within the pipeline may drive the motor in the reverse direction at speeds higher than synchronous, when a supply interruption coincides with a check valve failure. In order to prevent the motor from dangerous overvoltages due to self-excitation, it is recommended to connect a simple static protection circuit consisting of a resistor in series with a thyristor switch between any two lines of the motor. Critical resistance boundaries which will lead to loss of excitation, and demagnetisation of the rotor core are determined separately as a function of operating speed. A suitable resistance value chosen in the safe design area constitutes a reliable protection mechanism against self-excitation. |
| Starting Page | 3135 |
| Ending Page | 3145 |
| File Size | 964188 |
| Page Count | 11 |
| File Format | |
| ISBN | 0780364015 |
| ISSN | 01972618 |
| DOI | 10.1109/IAS.2000.882613 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2000-10-08 |
| Publisher Place | Italy |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Induction motors Capacitors Pipelines Switches Synchronous motors Valves Steady-state Mathematical model Protection Equivalent circuits |
| Content Type | Text |
| Resource Type | Article |
| Subject | Industrial and Manufacturing Engineering Control and Systems Engineering Electrical and Electronic Engineering |
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