| 摘要 |
The device determines the revolution rate of an induction motor using the saliency tracking method with a signal processing arrangement integrated into a sensor for measuring the electric current. The values of the trigonometric function for computing the rotation transformation in the rotating reference system are approximated with 1,0 and -1 and implemented with switches; a frequency divider is connected between the oscillator and the switches. The device determines the revolution rate of an induction motor using the saliency tracking method with a sensor for measuring the electric current and a signal processing arrangement integrated into the sensor with a phase-locked-loop and a voltage-controled-oscillator for a binary oscillation signal. The values of the trigonometric function for computing the rotation transformation in the rotating reference system are approximated with 1,0 and -1 and implemented with switches and frequency divider is connected between the oscillator and the switches. Independent claims are also included for the following: a use of the device for multiple motor drives. |
