Optimized sensorless DTC of PMSM for electric vehicles by using a switching command synchronized evaluation at standstill and low speed

The “direct-torque-control” (DTC) is an alternative to the commonly used “field oriented control” (FOC) for the control of a PMSM. One advantage of the DTC is its inherent ability of sensorless control. However at standstill and low speed range the back-EMF based model has problems to detect the rotor position. The switching command synchronized evaluation (SCSE) calculates the rotor position using the current change during active voltage vectors. Realizations of the SCSE using the FOC are known, but the combination of the SCSE with a discrete-time DTC avoids problems with switching disturbances. The capability of the presented optimized DTC is proved with measurements on a test bench.

[1]  Ching Chuen Chan,et al.  Overview of Permanent-Magnet Brushless Drives for Electric and Hybrid Electric Vehicles , 2008, IEEE Transactions on Industrial Electronics.

[2]  M. Schroedl,et al.  Sensorless control of AC machines at low speed and standstill based on the "INFORM" method , 1996, IAS '96. Conference Record of the 1996 IEEE Industry Applications Conference Thirty-First IAS Annual Meeting.

[3]  Jorg Roth-Stielow,et al.  Sensorless Control Techniques as Redundancy for the Control of Permanent Magnet Synchronous Machines in Electric Vehicles , 2014, 2014 IEEE Vehicle Power and Propulsion Conference (VPPC).

[4]  Toshihiko Noguchi,et al.  A New Quick-Response and High-Efficiency Control Strategy of an Induction Motor , 1986, IEEE Transactions on Industry Applications.

[5]  Matthias Hofer,et al.  Sensorless Control of PM Synchronous Motors in the Whole Speed Range Including Standstill Using a Combined INFORM/EMF Model , 2006, 2006 12th International Power Electronics and Motion Control Conference.

[6]  Jianguo Zhu,et al.  Initial Rotor Position and Magnetic Polarity Identification of PM Synchronous Machine Based on Nonlinear Machine Model and Finite Element Analysis , 2010, IEEE Transactions on Magnetics.

[7]  Thomas G. Habetler,et al.  Using PWM-Induced Transient Excitation and Advanced Signal Processing for Zero-Speed Sensorless Control of AC Machines , 2010, IEEE Transactions on Industrial Electronics.

[8]  M. F. Rahman,et al.  A direct torque controlled interior permanent magnet synchronous motor drive incorporating field weakening , 1997, IAS '97. Conference Record of the 1997 IEEE Industry Applications Conference Thirty-Second IAS Annual Meeting.

[9]  Silverio Bolognani,et al.  Sensorless control for IPMSM using PWM excitation: Analytical developments and implementation issues , 2011, 2011 Symposium on Sensorless Control for Electrical Drives.

[10]  Taehyung Kim,et al.  Intelligent Direct Torque Control of Brushless DC motors for hybrid electric vehicles , 2009, 2009 IEEE Vehicle Power and Propulsion Conference.

[11]  Yoji Takeda,et al.  Motor design considerations and test results of an interior permanent magnet synchronous motor for electric vehicles , 1997, IAS '97. Conference Record of the 1997 IEEE Industry Applications Conference Thirty-Second IAS Annual Meeting.

[12]  A. Tashakori,et al.  Direct torque controlled drive train for electric vehicle , 2012, WCE 2012.

[13]  Jorg Roth-Stielow,et al.  A comparison of different sensorless position acquisition methods at low speeds for a permanent magnet synchronous machine in vehicle applications , 2014, 2014 International Power Electronics Conference (IPEC-Hiroshima 2014 - ECCE ASIA).

[14]  Ralph Kennel,et al.  Sensorless speed and position control of synchronous machines using alternating carrier injection , 2003, IEEE International Electric Machines and Drives Conference, 2003. IEMDC'03..