### 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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Title of host publication | Conference Record - IAS Annual Meeting (IEEE Industry Applications Society) |

Publisher | IEEE |

Pages | 187-193 |

Number of pages | 7 |

Volume | 1 |

Publication status | Published - 1999 |

Externally published | Yes |

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

### Other

Other | Proceedings of the 1999 IEEE Industry Applications Conference - 34th IAS Annual Meeting |
---|---|

City | Phoenix, AZ, USA |

Period | 99/10/3 → 99/10/7 |

### Fingerprint

### ASJC Scopus subject areas

- Electrical and Electronic Engineering

### Cite this

*Conference Record - IAS Annual Meeting (IEEE Industry Applications Society)*(Vol. 1, pp. 187-193). IEEE.

**Sensorless very low and zero speed estimations with on-line secondary resistance estimation of induction motor without adding any signal.** / Akatsu, Kan; Kawamura, Atsuo.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

*Conference Record - IAS Annual Meeting (IEEE Industry Applications Society).*vol. 1, IEEE, pp. 187-193, Proceedings of the 1999 IEEE Industry Applications Conference - 34th IAS Annual Meeting, Phoenix, AZ, USA, 99/10/3.

}

TY - GEN

T1 - Sensorless very low and zero speed estimations with on-line secondary resistance estimation of induction motor without adding any signal

AU - Akatsu, Kan

AU - Kawamura, Atsuo

PY - 1999

Y1 - 1999

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=0033326439&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0033326439&partnerID=8YFLogxK

M3 - Conference contribution

VL - 1

SP - 187

EP - 193

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

PB - IEEE

ER -