A Novel Method Utilizing Trapezoidal Voltage to Compensate for Inverter Nonlinearity

The nonlinearity of an inverter could be regarded as the output distortions of the inverter. In this paper, voltages in a trapezoidal form were utilized to compensate for the nonlinearity of an inverter. Undesirable harmonic distortions in the overall system were mitigated through the modulating shape of the trapezoidal voltage. For trapezoidal modulation, a dedicated modulator was designed to facilitate adaptive compensation for a wide operating range. The compensation effects from the proposed method were examined in a practical system, in which a permanent magnet synchronous motor (PMSM) was driven without any position sensor. Additionally, it was shown that the proposed method could enhance the sensorless control of the PMSM by reducing the output distortions of the inverter.

[1]  J. Luukko,et al.  Modeling and Analysis of the Dead-Time Effects in Parallel PWM Two-Level Three-Phase Voltage-Source Inverters , 2009, IEEE Transactions on Power Electronics.

[2]  A. G. Yepes,et al.  Three-Phase PLLs With Fast Postfault Retracking and Steady-State Rejection of Voltage Unbalance and Harmonics by Means of Lead Compensation , 2011, IEEE Transactions on Power Electronics.

[3]  Hyun-Soo Kim,et al.  On-line dead-time compensation method using disturbance observer , 2003 .

[4]  Z. Q. Zhu,et al.  Modeling and compensation of inverter nonlinearity effects in carrier signal injection-based sensorless control methods from positive sequence carrier current distortion , 2010, 2010 IEEE Energy Conversion Congress and Exposition.

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

[6]  Russel J. Kerkman,et al.  Pulse based dead time compensator for PWM voltage inverters , 1995, Proceedings of IECON '95 - 21st Annual Conference on IEEE Industrial Electronics.

[7]  Wootaik Lee,et al.  Effective Dead-Time Compensation Using a Simple Vectorial Disturbance Estimator in PMSM Drives , 2010, IEEE Transactions on Industrial Electronics.

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

[9]  Seung-Ki Sul,et al.  Implementation of sensorless vector control for super-high speed PMSM of turbo-compressor , 2001, Conference Record of the 2001 IEEE Industry Applications Conference. 36th IAS Annual Meeting (Cat. No.01CH37248).

[10]  Y. Li,et al.  Analysis and Digital Implementation of Cascaded Delayed-Signal-Cancellation PLL , 2011, IEEE Transactions on Power Electronics.

[11]  T.A. Lipo,et al.  On-line dead time compensation technique for open-loop PWM-VSI drives , 1998, APEC '98 Thirteenth Annual Applied Power Electronics Conference and Exposition.

[12]  M. Sanada,et al.  Effectiveness of Voltage Error Compensation and Parameter Identification for Model-Based Sensorless Control of IPMSM , 2009, IEEE Transactions on Industry Applications.

[13]  Jun-ichi Itoh,et al.  Output Voltage Correction for a Voltage Source Type Inverter of an Induction Motor Drive , 2010, IEEE Transactions on Power Electronics.

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

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

[16]  Seung-Ki Sul,et al.  A new compensation strategy reducing voltage/current distortion in PWM VSI systems operating with low output voltages , 1995 .

[17]  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 .

[18]  M. Sanada,et al.  Sensorless control strategy for salient-pole PMSM based on extended EMF in rotating reference frame , 2001, Conference Record of the 2001 IEEE Industry Applications Conference. 36th IAS Annual Meeting (Cat. No.01CH37248).