Time optimal and loss minimizing deadbeat-direct torque and flux control for interior permanent magnet synchronous machines

This paper presents time optimal control of an interior permanent magnet synchronous machine (IPMSM) in voltage- and current- limited conditions using deadbeat-direct torque and flux control (DB-DTFC). A commanded air-gap torque and flux can be achieved by the end of each PWM period using DB-DTFC. However, it may take several PWM periods to achieve a desired torque that is physically infeasible in one step when operating near the voltage limit. The large torque command can be shaped as a feasible trajectory so that the deadbeat torque and flux is achieved for every sample time instant (switching period) along the trajectory. In this paper, the feasible trajectory is dynamically optimized to achieve a large torque command in the shortest time during voltage- and current-limited operation. Loss minimizing stator flux linkage is used during steady state operation to reduce computational complexity of the dynamic optimization and to operate the IPMSM at the loss minimizing condition. The voltage- and current-limited operation of IPMSM drives is evaluated in both simulation and experiment in this paper.

[1]  R. Bellman.  Dynamic programming. , 1957, Science.

[2]  Shengming Li,et al.  A fast response torque control for interior permanent-magnet synchronous motors in extended flux-weakening operation regime , 2001, IEMDC 2001. IEEE International Electric Machines and Drives Conference (Cat. No.01EX485).

[3]  Chan-Hee Choi,et al.  Wide-Speed Direct Torque and Flux Control for Interior PM Synchronous Motors Operating at Voltage and Current Limits , 2013, IEEE Transactions on Industry Applications.

[4]  S. Doki,et al.  Novel Techniques for Fast Torque Response of IPMSM Based on Space-Vector Control Method in Voltage Saturation Region , 2007, IECON 2007 - 33rd Annual Conference of the IEEE Industrial Electronics Society.

[5]  J. R. Ragazzini,et al.  Sampled-Data Control Systems , 1959 .

[6]  Tae-Suk Kwon,et al.  Novel anti-windup of a current regulator of a surface-mounted permanent-magnet motor for flux-weakening control , 2005 .

[7]  Thomas G. Habetler,et al.  Performance evaluation of a direct torque controlled drive in the continuous PWM-square wave transition region , 1993 .

[8]  Joachim Holtz,et al.  On continuous control of PWM inverters in the overmodulation range including the six-step mode , 1993 .

[9]  Robert D. Lorenz,et al.  Robustness evaluation of deadbeat, direct torque and flux control for induction machine drives , 2009, 2009 13th European Conference on Power Electronics and Applications.

[10]  Kwanghee Nam,et al.  A dynamic decoupling control scheme for high-speed operation of induction motors , 1999, IEEE Trans. Ind. Electron..

[11]  Joachim Holtz,et al.  On continuous control of PWM inverters in the overmodulation range including the six-step mode , 1992, Proceedings of the 1992 International Conference on Industrial Electronics, Control, Instrumentation, and Automation.

[12]  Shinji Doki,et al.  Fast torque control system of PMSM based on model predictive control , 2009, 2009 35th Annual Conference of IEEE Industrial Electronics.

[13]  D. Casadei,et al.  A Comparison of Four Robust Control Schemes for Field-Weakening Operation of Induction Motors , 2012, IEEE Transactions on Power Electronics.

[14]  R. Lorenz,et al.  Flux-Based Deadbeat Control of Induction-Motor Torque , 2003 .

[15]  R.D. Lorenz,et al.  Implementation and Evaluation of a Stator and Rotor Flux Linkage-Based Dead-Beat, Direct Torque Control of Induction Machines at the Operational Voltage Limits , 2007, 2007 IEEE Industry Applications Annual Meeting.

[16]  Robert D. Lorenz,et al.  Deadbeat-direct torque & flux control motor drive over a wide speed, torque and flux operating space using a single control law , 2010, 2010 IEEE Energy Conversion Congress and Exposition.

[17]  M. Depenbrock,et al.  Direct self control of inverter-fed induction machine, a basis for speed control without speed-measurement , 1989, Conference Record of the IEEE Industry Applications Society Annual Meeting,.

[18]  Seung-Ki Sul,et al.  Generalized solution of minimum time current control in three-phase balanced systems , 1998, IEEE Trans. Ind. Electron..

[19]  Shinji Doki,et al.  Voltage limiter calculation method for fast torque response of IPMSM in overmodulation range , 2009, 2009 35th Annual Conference of IEEE Industrial Electronics.

[20]  Shinji Doki,et al.  Fast Torque Control System of PMSM based on Model Predictive Control Considering Overmodulation Region , 2010 .

[21]  Sean R Eddy,et al.  What is dynamic programming? , 2004, Nature Biotechnology.

[22]  R. D. Lorenz,et al.  Dynamic loss minimization using improved deadbeat-direct torque and flux control for interior permanent magnet synchronous machines , 2012, 2012 IEEE Energy Conversion Congress and Exposition (ECCE).

[23]  L.M. Tolbert,et al.  Direct torque control of induction machines using space vector modulation , 1991, Conference Record of the 1991 IEEE Industry Applications Society Annual Meeting.

[24]  Graham C. Goodwin,et al.  Adaptive filtering prediction and control , 1984 .

[25]  A very fast direct torque control for interior permanent magnet synchronous motors start up , 2005 .

[26]  H. Abu-Rub,et al.  Sensorless Control of Induction Motors for Maximum Steady-State Torque and Fast Dynamics at Field Weakening , 2006, Conference Record of the 2006 IEEE Industry Applications Conference Forty-First IAS Annual Meeting.

[27]  Seung-Ki Sul,et al.  Design of fast response current controller using d-q axis cross-coupling , 1996, Proceedings of the 1996 IEEE IECON. 22nd International Conference on Industrial Electronics, Control, and Instrumentation.

[28]  Thomas G. Habetler,et al.  Direct torque control of induction machines over a wide speed range , 1992, Conference Record of the 1992 IEEE Industry Applications Society Annual Meeting.

[29]  Robert D. Lorenz,et al.  One-step optimal space vector PWM current regulation using a neural network , 1994, Proceedings of 1994 IEEE Industry Applications Society Annual Meeting.

[30]  Chan-Hee Choi,et al.  Deadbeat-direct torque and flux control for interior PM synchronous motors operating at voltage and current limits , 2011, 2011 IEEE Energy Conversion Congress and Exposition.

[31]  Shengming Li,et al.  Torque control patching and anti-windup and bumpless transfer conditioning of current regulators for high-speed PMSM systems , 2001, 2001 IEEE 32nd Annual Power Electronics Specialists Conference (IEEE Cat. No.01CH37230).

[32]  Nicola Bianchi,et al.  Time optimal current control for PMSM drives , 2002, IEEE 2002 28th Annual Conference of the Industrial Electronics Society. IECON 02.

[33]  S. Doki,et al.  Realization of a fast current control system of PMSM based on model predictive control , 2008, 2008 34th Annual Conference of IEEE Industrial Electronics.

[34]  Robert D. Lorenz,et al.  Deadbeat-Direct Torque and Flux Control of Interior Permanent Magnet Synchronous Machines With Discrete Time Stator Current and Stator Flux Linkage Observer , 2011, IEEE Transactions on Industry Applications.