Electric Drives3 On the other hand the current model for the rotor flux space phasor is based on rotor equation in rotor coordinates (  b =  r ): (9
{"Image DocumentName": "The corresponding signal flow diagram is shown in figure 9.30.", "Image ImageDescription": "On the other hand the current model for the rotor flux space phasor is based on rotor equation in rotor coordinates (wb = wr): (9.97) Two coordinate transformations - one for current and other for rotor flux - are required to produce results in stator coordinates. This time the observer works even at zero frequency but is very sensitive to the detuning of parameters Lm and tr due to temperature and magnetic saturation variation. Besides, it requires a rotor speed or position sensor. Parameter adaptation is a solution. The corresponding signal flow diagram is shown in figure Electric Drives.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}