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A Speed-Sensorless Start-Up Method of an Induction Motor Driven by a Modular Multilevel Cascade Inverter (MMCI-DSCC).
- Source :
- IEEE Transactions on Industry Applications; Jul2014, Vol. 50 Issue 4, p2671-2680, 10p
- Publication Year :
- 2014
-
Abstract
- This paper presents theoretical and experimental discussions on a practical speed-sensorless start-up method for an induction motor driven by a modular multilevel cascade inverter based on double-star chopper cells (MMCI-DSCC) from standstill to middle speed. This motor drive is suitable, particularly for a large-capacity fan- or blower-like load. The load torque is proportional to a square of the motor mechanical speed. The start-up method is characterized by combining capacitor-voltage control with motor-speed control. The motor-speed control with the minimal stator current plays a crucial role in eliminating a speed sensor from the drive system and in reducing an ac-voltage fluctuation occurring across each dc capacitor. Experimental results obtained from the 400-V 15-kW downscaled system with no speed sensor verify that the motor-speed control proposed for the DSCC-based drive system can enhance the start-up torque by a factor of three under the same ac-voltage fluctuation. Several start-up waveforms show stable performance from standstill to middle speed with different load torques. [ABSTRACT FROM AUTHOR]
- Subjects :
- INDUCTION motors
ELECTRIC inverters
ELECTRIC motors
ELECTRIC power
ELECTRIC currents
Subjects
Details
- Language :
- English
- ISSN :
- 00939994
- Volume :
- 50
- Issue :
- 4
- Database :
- Complementary Index
- Journal :
- IEEE Transactions on Industry Applications
- Publication Type :
- Academic Journal
- Accession number :
- 97129636
- Full Text :
- https://doi.org/10.1109/TIA.2013.2292996