Self-commissioning of inverter nonlinear effects in AC drives

The paper presents a novel technique for an accurate identification of the inverter nonlinear effects, such as the dead-time and on-state voltage drops. The proposed technique is very simple and it is based only on a current control scheme. If the inverter load is an AC motor, the inverter effects can be identified at drive startup using as measured quantities the motor currents and the inverter DC link voltage. The identified inverter error is stored in a Look-Up Table (LUT) that can be subsequently used by the vector control algorithm. The proposed method has been tested on a 1 kVA inverter prototype and the obtained results demonstrate the feasibility of the proposed solution.

[1]  J. Holtz,et al.  Sensorless vector control of induction motors at very low speed using a nonlinear inverter model and parameter identification , 2001, Conference Record of the 2001 IEEE Industry Applications Conference. 36th IAS Annual Meeting (Cat. No.01CH37248).

[2]  Thomas G. Habetler,et al.  Zero-speed tacholess IM torque control: simply a matter of stator voltage integration , 1998 .

[3]  S. Bolognani,et al.  Self-commissioning compensation of inverter non-idealities for sensorless AC drives applications , 2002 .

[4]  Giuseppe Tomasso,et al.  Predictive compensation of dead time effects in VSI feeding induction motors , 2000, Conference Record of the 2000 IEEE Industry Applications Conference. Thirty-Fifth IAS Annual Meeting and World Conference on Industrial Applications of Electrical Energy (Cat. No.00CH37129).

[5]  Frede Blaabjerg,et al.  An Ideal PWM-VSI Inverter with Feedforward and Feedback Compensation , 1993 .

[6]  Robert D. Lorenz,et al.  Inverter nonlinearity effects in high frequency signal injection-based, sensorless control methods , 2003 .

[7]  Seung-Ki Sul,et al.  Inverter output voltage synthesis using novel dead time compensation , 1996 .

[8]  G Pellegrino,et al.  Accurate Inverter Error Compensation and Related Self-Commissioning Scheme in Sensorless Induction Motor Drives , 2010, IEEE Transactions on Industry Applications.

[9]  Daniel Edward Salt,et al.  Compensation of Inverter Nonlinear Distortion Effects for Signal-Injection-Based Sensorless Control , 2011, IEEE Transactions on Industry Applications.

[10]  Joachim Holtz,et al.  Sensorless control of induction motor drives , 2002, Proc. IEEE.

[11]  S. Bolognani,et al.  Repetitive-Control-Based Self-Commissioning Procedure for Inverter Nonidealities Compensation , 2008, IEEE Transactions on Industry Applications.

[12]  Naomitsu Urasaki,et al.  Dead-time compensation strategy for permanent magnet synchronous motor drive taking zero-current clamp and parasitic capacitance effects into account , 2005 .

[13]  A. Tani,et al.  Performance analysis of a speed sensorless induction motor drive based on a constant switching frequency DTC scheme , 2000, Conference Record of the 2000 IEEE Industry Applications Conference. Thirty-Fifth IAS Annual Meeting and World Conference on Industrial Applications of Electrical Energy (Cat. No.00CH37129).

[14]  Terrence J. Summers,et al.  Dead-time issues in predictive current control , 2004 .

[15]  Lazhar Ben-Brahim,et al.  On the compensation of dead time and zero-current crossing for a PWM-inverter-controlled AC servo drive , 2004, IEEE Transactions on Industrial Electronics.

[16]  Jeffrey H. Lang,et al.  Inverter nonlinearities and discrete-time vector current control , 1992, [Proceedings] APEC '92 Seventh Annual Applied Power Electronics Conference and Exposition.

[17]  Q.M.J. Wu,et al.  An accurate approach of nonlinearity compensation for VSI inverter output voltage , 2004, IEEE Transactions on Power Electronics.

[18]  Fang Zheng Peng,et al.  Dead-Time Elimination for Voltage Source Inverters , 2008, IEEE Transactions on Power Electronics.