This observer shall be and additionally applied in rotor and stator-flux-vector-regulated drives, plus DTC drives
Aside from the adaptation of the stator resistance having temperature, most other details in the AFFO may differ throughout the procedure too, for instance the rotor opposition on account of heat transform, that may provides an essential effect on the pace accuracy out-of the latest adaptive observer. Brand new stator and rotor notice-inductance and you can magnetizing inductance are different because of magnetized saturation, are it it is possible to to use an excellent nonlinear magnetic design. In steady state, it is known one to a misestimation of one’s rotor opposition will bring proper estimations of your stator and you may rotor flux, but leads to an excellent misestimation of speed .
Even, it can be utilized in combination with the Discrete-Big date Direct Torque Handle approach (DT-DTC), whoever advantage over the new classical DTC experience new torque-ripple-free procedure from the whole rate diversity .
4.cuatro.dos. Adaptive Pseudoreduced-Order Flux Observer (APFO)
The field-dependent control (FOC) design try commonly used getting high performance power over Air conditioning motors. In the case of induction otherwise brushless push systems, the latest FOC needs an increase alarm, eg shaft-climbed tachogenerator, resolver, or electronic shaft updates encoder, for obtaining price guidance, and therefore spoils the latest ruggedness and you can simplicity of new motor. Hence, multiple rates observers have been designed to resolve this matter, for example AFFO to have quoting the latest rotor flux and you may price, whoever computation procedure is easy but it is a shaky program oftentimes and you may an inappropriate to have basic programs (high rates problems can take place significantly less than heavier lots and you can steady-county price disturbances may occur around light tons) . (περισσότερα…)