Speed Estimation Method utilizing Rotor Slot Harmonics Detected from Line Current for Speed Sensorless Drive of Ultra High Speed Induction Machine

2006 ◽  
Author(s):  
Koichi Nishibata ◽  
Muneaki Ishida ◽  
Shinji Doki ◽  
Takashi Masuzawa ◽  
Masami Fujitsuna
Keyword(s):  
High Speed ◽  
Induction Machine ◽  
Estimation Method ◽  
Speed Estimation ◽  
Speed Sensorless ◽  
Line Current ◽  
Ultra High Speed ◽  
Sensorless Drive

Speed Estimation Method for Ultra High Speed Induction Machine Utilizing Rotor Slot Harmonics Appearing in Neutral Point Voltage

2009 ◽  
Vol 129 (1) ◽  
pp. 1-9 ◽  
Author(s):  
Koichi Nishibata ◽  
Muneaki Ishida ◽  
Shinji Doki ◽  
Takashi Masuzawa ◽  
Masami Fujitsuna
Keyword(s):  
High Speed ◽  
Induction Machine ◽  
Estimation Method ◽  
Neutral Point ◽  
Speed Estimation ◽  
Ultra High Speed

Speed estimation method for ultrahigh-speed induction machine utilizing rotor slot harmonics appearing in neutral point voltage

2011 ◽  
Vol 176 (3) ◽  
pp. 59-68
Author(s):  
Koichi Nishibata ◽  
Muneaki Ishida ◽  
Shinji Doki ◽  
Takashi Masuzawa ◽  
Masami Fujitsuna
Keyword(s):  
Induction Machine ◽  
Estimation Method ◽  
Neutral Point ◽  
Speed Estimation

scholarly journals Speed Sensorless Control of Six-Phase Asynchronous Motor Drive

2017 ◽  
Vol 4 (1.) ◽  
Author(s):  
Z.M.S. Elbarbary
Keyword(s):  
Induction Motor ◽  
High Performance ◽  
Asynchronous Motor ◽  
Estimation Method ◽  
Motor Drives ◽  
Operating Conditions ◽  
Speed Estimation ◽  
Speed Sensorless ◽  
Stator Current ◽  
Current Error

Multi -phase ac motor drives are nowadays considered for various applications, due to many advantages that they offer when compared to three-phase motors. Cancellation of mechanical position or speed sensors at the motor shaft have the attractions for adjustable speed drives of induction motor to reduce the cost and increase the reliability. To replace the sensor, information of the rotor speed is extracted from measured stator currents and voltages at motor terminals. This paper investigates speed estimation method using model reference adaptive system (MRAS) to improve the performance of a sensorless vector controller of six-phase induction motor (IM). In the proposed method, the stator current is used as the state variable to estimate the speed. Since the stator current error is represented as a function of the first degree for the error value in the speed estimation, the proposed method provides fast speed estimation and is also, more robust to variations in the stator resistance, compared with other MRAS methods. Consequently, this method can improve the performance of a sensorless vector controller in a low speed region and at zero-speed. The proposed method is verified by simulation using the Matlab/Simulink package. The performance of the proposed system is investigated at different operating conditions. The proposed controller is robust and suitable for high performance six-phase induction motor drives. Simulation results validate the proposed approaches.

Design and Simulation of Speed Sensorless Control System for Induction Motor

2012 ◽  
Vol 201-202 ◽  
pp. 396-399
Author(s):  
Hong Yu Wang ◽  
Yan Peng ◽  
Yan Hou
Keyword(s):  
Control System ◽  
Induction Motor ◽  
Sensorless Control ◽  
Estimation Method ◽  
Estimation Accuracy ◽  
Speed Estimation ◽  
Rotor Speed ◽  
Speed Sensorless ◽  
Input Filter ◽  
Output Filter

In this paper, a method for estimating induction motor’s rotor speed is proposed. The proposed rotor speed estimation method is based on model reference adaptive identification theory. By applying the proposed method, the induction motor control system can estimate the rotor speed of the induction motor precisely. To improve the rotor speed estimation performance of the system, one input filter and one output filter are introduced into the speed sensorless control system. The introduced input filter and output filter enhance the estimation accuracy and improve the reliability and robustness of the system. The speed sensorless control system based on proposed method was built with Simulink blocks in Matlab platform. The simulation results indicate that the proposed method can operate stably in whole range of speed with preferable identification precision of the rotor speed.

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