Feedforward torque control of a switched reluctance motor based on static measurements

Abstract

A model of the non-linear switched reluctance motor (SRM) has been developed that provides an analytical representation based on static measurements of the j l u x linkage by simple polynomial functions. Using an approximation of the y(i)-characteristic with the rotor position angle y as parameter it is possible to calculate the dynamic pedormance of the drive in the whole torque-speed range. Depending on the torque command T, the switching angles yo ("on") and yc ("off") are determined with minimum ohmic losses under the assumption of a constant supply voltage. For the ease of demonstration the results are restricted to the field weakening range. It turns out that the switching angles are parabolic functions of the torque with the well-known tendency for advance-shijting at increasing speed. The calculated current waveforms and average torque values coincide well with those measured at the test drive.

Design and modeling of open-loop components for a biomedical application

“…At any given rotor position, the phase inductance also varies with the instantaneous phase current. Therefore, the phase inductance versus mover position will be represented by Fourier series 20, and the nonlinear variation of its coefficients with current will be expressed by polynomial functions (22,23), [21][22][23][24][25][26]:…”

Elektrische Antriebe — Grundlagen

“…Nach Untersuchungen, die Anfang der achtziger Jahre durchgeführt wurden [369,370,427,428], aber nicht zu industriell verwertbaren Ergebnissen führten, wurde das Thema erst in den neunziger Jahren wieder aufgenommen [367,371,372,373,388,417,418,424,429,431,432,437,438,439,443,444,445,447] …”

Elektrische Antriebe - Grundlagen

“…Nach Untersuchungen, die Anfang der achtziger Jahre durchgeführt wurden [421,422,479,480], aber nicht zu industriell verwertbaren Ergebnissen führten, wurde das Thema erst in den neunziger Jahren wieder aufgenommen [419,423,424,425,440,469,470,476,481,483,484,489,490,491,495,496,497,499] Nach Untersuchungen, die Anfang der achtziger Jahre durchgeführt wurden [421,422,479,480], aber nicht zu industriell verwertbaren Ergebnissen führten, wurde das Thema erst in den neunziger Jahren wieder aufgenommen [419,423,424,425,440,469,470,476,481,483,484,489,490,491,495,496,497,499] …”