Conference

On-Line Parameters Estimation for Position Sensorless PMSM Control
Eric Zhang, Fairchild Semiconductor, China
Nominated for the Best Paper Award

The permanent magnet synchronous motor (PMSM) control is based on the back-EMF estimation. But this method is sensitive to many parameters. In this paper, a parameter estimation method has been introduced. The resistance, the inductance, and the back-EMF constant can be estimated on-line. The simulation results illustrate the validity of the proposed method.

Common Analysis of Neutral Point Voltage of Three-level NPC Inverter
Qinglong Zhong, Delta Electronics (Shanghai), China
Zhen Cao, Delta Electronics (Shanghai), China
Hover Li, Delta Electronics (Shanghai), China
Hongjian Gan, Delta Electronics (Shanghai), China
Jianping Ying, Delta Electronics (Shanghai), China
Nominated for the Young Engineer Award
Nominated for the Best Paper Award

In the three-level NPC (Neutral Point Clamped) inverter, the deviation of neutral point voltage will cause unbalance voltage stress on switches and produce more output harmonics. There are many papers giving analysis of elements influencing the dc component deviations or ac component oscillations of neutral point voltage. But they are either equalization phase loads or some restriction on PWM patterns of three phases. This paper will present a common analysis from mathematical point of view on dc component deviations.

11:00

Construction of a Compact In-Wheel Transverse Flux Machine with Distributed Windings
Salwa Baserrah, University of Bremen, Germany
Keno Rixen, University of Bremen, Germany
Bernd Orlik, University of Bremen, Germany
Nominated for the Best Paper Award

A novel design of a small outer rotor transverse flux machine for low speed platforms with distributed windings around the stator will be constructed and investigated. The proposed configuration is set in a comparative study via finite element (FE-) program, with a similar machine of the normal layered-three phase construction. The new design showed better torque productivity even if the axial length of the machine is reduced. A prototype is shown and some performances are summarized.

11:30

State of the Art of Real-Time Hardware-in-the-Loop Simulation Technology for Rail Vehicles
Zhiyu Cao, Paderborn University, Germany
Joachim Böcker, Paderborn University, Germany
Norbert Fröhleke, Paderborn University, Germany
Chengjun Fu, CSR Zhuzhou Electric Locomotive, China
Laisheng Tong, CSR Zhuzhou Electric Locomotive, China

Nowadays modern electrical locomotives are powered by converter-fed AC motors and controlled by digital controllers. Since dynamics of such traction drive systems are determined not only by power components, but also by real-time software, distributed computing and inter-controllers communication, a simulative investigation and an integration test of such systems are order of magnitude more complex than those in previous generations. Based on conventional simulation platforms on non-real-time mode the real-time effects of the control system and the effects of controller hardware cannot be studied. In order to achieve a maximum test depth at a minimized risk and cost, a real-time hardware-in-the-loop (HIL) simulation platform is very considerable. In this contribution the state of the art and technical trends of HIL simulation technology for rail vehicles are presented.