Precise Volt-Second Measuring Instrument for Voltage-Source Inverters

International Conference on Electrical Machines and Systems (ICEMS), pp. 1–6

Abstract

Accurately measuring pulse modulated voltage is challenging due to its steep voltage slopes and time delays during switching. However, for modern sensorless drives, knowledge of instantaneous phase voltage is required for e.g. flux linkage estimation. This paper presents a novel measuring technique for precise volt-second sensing that combines the advantages of analog circuit technology with the performance of an FPGA. The presented sensor prototype for volt-second sensing is based on the concept of an analog synchronous voltage-to-frequency converter. It is shown how to save additional expensive components by utilizing existing control hardware. The working principle is demonstrated by simulations and finally validated by measurements on the testbench.

Authors 5

1. Anne von Hoegen Aachen Institute for Power Electronics and Electrical Drives (ISEA)

   RWTH Aachen University

   Affiliation as printed

   Institute for Power Electronics and Electrical Drives - RWTH Aachen University Campus-Boulevard 89,Aachen,Germany,52074

2. Georg Tobias Götz Aachen Institute for Power Electronics and Electrical Drives (ISEA)

   RWTH Aachen University

   Affiliation as printed

   Institute for Power Electronics and Electrical Drives - RWTH Aachen University Campus-Boulevard 89,Aachen,Germany,52074

3. Nina Hartgenbusch Aachen Institute for Power Electronics and Electrical Drives (ISEA)

   RWTH Aachen University

   Affiliation as printed

   Institute for Power Electronics and Electrical Drives - RWTH Aachen University Campus-Boulevard 89,Aachen,Germany,52074

4. Rik W. De Doncker Aachen Institute for Power Electronics and Electrical Drives (ISEA)

   RWTH Aachen University

   Affiliation as printed

   Institute for Power Electronics and Electrical Drives - RWTH Aachen University Campus-Boulevard 89,Aachen,Germany,52074

5. Tetsuya Kojima

   Mitsubishi Electric (Japan)

   Affiliation as printed

   Advanced Technology R&D Center Mitsubishi Electric Corporation,Amagasaki,Japan