### Abstract

In the speed sensorless control of the induction motor, the machine parameters (especially the secondary resistance R_{2}) have a strong influence to the speed estimation. It is known that the simultaneous estimation of the speed and the R_{2} is impossible in the slip frequency type vector control, because the secondary flux is constant. In addition, the output voltage error due to the dead time and the voltage drop of the inverter makes influence to the secondary flux estimation, but the simultaneous compensation of the output voltage and the primary resistance R_{2} is very difficult. In this paper the R_{2} estimation without adding any additional signal to the stator current is proposed. In the high frequency range, the R_{2} is estimated in the transient state, and in the very low frequency range, the R_{2} is estimated in proportion to the estimated R_{1} when the ideal voltage source by the power op-amp is used instead of the voltage source inverter to avoid the output voltage error. In the use of these algorithms, the low speed estimation was possible and the zero speed control was achieved under the 10-40% load conditions. This paper clarified that the zero speed estimation is possible with the primary and secondary resistance estimations when the output voltage is ideal.

Original language | English |
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Pages (from-to) | 187-193 |

Number of pages | 7 |

Journal | Conference Record - IAS Annual Meeting (IEEE Industry Applications Society) |

Volume | 1 |

Publication status | Published - 1999 Dec 1 |

Event | Proceedings of the 1999 IEEE Industry Applications Conference - 34th IAS Annual Meeting - Phoenix, AZ, USA Duration: 1999 Oct 3 → 1999 Oct 7 |

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### ASJC Scopus subject areas

- Control and Systems Engineering
- Industrial and Manufacturing Engineering
- Electrical and Electronic Engineering