Brezsenzorska regulacija asinhronskega motorja za nizke hitrosti /
Regulirani asinhronski pogoni brez mehanskega senzorja hitrosti so zanimivi zaradi nizke cene in visoke zanesljivosti. Meritev hitrosti nadomestimo z meritvami statorskih tokov in napetosti. Vendar meritev napetosti vnaša dodaten strošek in se ji poskušamo izogniti. Predstavljena regulacijska shema...
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| Main Authors: | , |
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| Format: | Book Chapter |
| Jezik: | Slovenian |
| Teme: | |
| Online dostop: | http://ev.fe.uni-lj.si/5-2003/edelbaher.pdf |
| Sorodne knjige/članki: | Vsebovano v:
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| Izvleček: | Regulirani asinhronski pogoni brez mehanskega senzorja hitrosti so zanimivi zaradi nizke cene in visoke zanesljivosti. Meritev hitrosti nadomestimo z meritvami statorskih tokov in napetosti. Vendar meritev napetosti vnaša dodaten strošek in se ji poskušamo izogniti. Predstavljena regulacijska shema z opazovalnikom rotorskega fluksa temelji samo na meritvah tokov in omogoča delovanje tudi v območju nizkih hitrosti, kot je to razvidno iz eksperimentalnih rezultatov. Speed sensorless drives have been receiving a lot of attention in last years. Their main advantages are their low cost and increased reliability. The rotor speed measurement is replaced by the measurement of the stator currents and voltages. However, the measurement of voltages in the pulse width modulated drives is quite complicated and presents an additional cost. In this paper, a new rotor flux observer (Fig. 3), based on an estimation of the electromotive force (EMF) ^er, is presented. By using a stator current observer (11), we can calculate the estimation error (12), which is then fed into the PI controller. The output from this regulator is ^er, which has the meaning of EMF. The estimated rotor flux is then calculated from (14) and the estimated rotor speed is calculated from the cross product of ^er and estimated rotor flux. The low-speed performance as well as the reference tracking performance of speed at no load and rapidly changing load are demonstrated in series of transient characteristics by experimental results in Figures 6 - 9. |
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| Fizični opis: | str. 261-266. |
| ISSN: | 0013-5852 |