Model-Based Commutation of Brushless Permanent Magnet Motors for High-Speed Mechatronic Systems

2007 ◽  
Author(s):  
Martin Hosek ◽  
Roumen Botev
Keyword(s):  
Permanent Magnet ◽  
High Speed ◽  
Permanent Magnet Motors ◽  
Mechatronic Systems ◽  
Current Feedback ◽  
Model Based ◽  
Three Phase ◽  
Speed Performance ◽  
Bus Voltage ◽  
Vector Modulation

A method for voltage commutation of a three-phase wye-connected sinusoidal brushless permanent magnet motor is presented. The method combines a model-based approach with space-vector modulation to compensate for undesirable effects of winding inductance and to maximize utilization of power source bus voltage. The proposed approach provides improved torque-speed performance and higher efficiency of the motor, which benefits are particularly significant in high-speed and cost-sensitive applications that lack current feedback capabilities. The benefits are demonstrated experimentally on a high-speed linear drive for a precision robotic system.

scholarly journals Rotor dynamic experimental investigation of an ultra-high-speed permanent magnet synchronous motor supported on a three-pad bidirectional gas foil bearing

2019 ◽  
Vol 11 (9) ◽  
pp. 168781401987536
Author(s):  
Wenjie Cheng ◽  
Zhikai Deng ◽  
Ling Xiao ◽  
Bin Zhong ◽  
Wenbo Duan
Keyword(s):  
Permanent Magnet ◽  
High Speed ◽  
Permanent Magnet Synchronous Motor ◽  
Synchronous Motor ◽  
Rotor System ◽  
Permanent Magnet Motors ◽  
Foil Bearings ◽  
Foil Bearing ◽  
Ultra High Speed ◽  
Rotor Dynamic

With a 10-kW, 120,000-r/min, ultra-high-speed permanent magnet synchronous motor taken as a prototype, experimental research is conducted on the rotor dynamic behaviours of a three-pad bidirectional gas foil bearing high-speed motor rotor system. Load-carrying properties of the three-pad bidirectional gas foil bearing are analysed, and natural frequencies of conical and parallel whirling modes of the elastically supported rotor are calculated based on an appropriate simplification to the stiffness and damping coefficients of the gas foil bearings. The prototype passes through a 90,000-r/min coast-down experiment. Experiments show that there are violent subsynchronous whirling motions that are evoked by the gas foil bearing–rotor system itself. The cause of shaft orbit drift is analysed, and the corresponding solution is put forward. The theoretical analysis and experimental results can offer a useful reference to the bearing–rotor system design of ultra-high-speed permanent magnet motors and its subsequent dynamic analysis.

The Timing Control Research for the Motor in Wheel

2014 ◽  
Vol 496-500 ◽  
pp. 1356-1359
Author(s):  
Chuan Xue Song ◽  
Si Lun Peng ◽  
Shi Xin Song ◽  
Jian Hua Li ◽  
Feng Xiao
Keyword(s):  
Permanent Magnet ◽  
Control Strategy ◽  
High Speed ◽  
Permanent Magnet Synchronous Motor ◽  
Synchronous Motor ◽  
Motor Simulation ◽  
Timing Control ◽  
Control Research ◽  
Speed Performance ◽  
High Torque

For the permanent magnet synchronous motor used in electric vehicle wheel, in order to obtain high torque at low speed, a lot of pole pairs are designed in the structure. So the electrical angle will rotate too fast, and the commutation delay will appear apparently at high speed. The commutation process of permanent magnet synchronous motor is analyzed and the timing control according to rotate speed is deduced. A motor simulation model is built to verify the control strategy. The result shows that the strategy can effectively improve high speed performance of motor.

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