Patent ID: 6931918

Claim:
A device for determining a rotary orientation of a motor, comprising: a resolver facility with a resolver signal output for outputting a signal derived from the rotary orientation: a feeding connection to feed the resolver signal to a single control system, the control system having a trigger output to trigger and an evaluating input to receive an evaluation signal for evaluating the resolver signal; a microcontroller or digital signal processor receiving at least two output signals from the resolver facility in parallel and having a single output to present the trigger signal to the resolver; and an evaluating unit to evaluate the resolver output signals through executing a tracking procedure, wherein the tracking procedure is based on: F ( s )=Φ( s )/φ( s )= K 1 *(1 +K 2 *s )/( s 2 +K 1 *K 2 *s+K 1 ), wherein Φ is the estimated rotor angle, φ is the actual rotor angle, K 1 and K 2 are filter parameters and s is a complex frequency.