The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
This paper introduces a new scheme to track the rotor position of an induction motor, which reduces distortion introduced into the motor current by sensorless control techniques. The scheme uses the measurement of current derivatives in response to test vectors imposed during the null switching vectors of a standard PWM scheme. The test vectors are derived from H-Bridges connected in series with the...
The paper introduces a new scheme to track the rotor position of an induction motor. The scheme uses the measurement of current derivatives during null switching vectors of a standard PWM scheme and reduces the minimum pulse widths required to allow high frequency switching oscillations to die down. The motor current distortion is therefore also reduced. The method uses H-Bridges connected in series...
This paper describes a sensorless position estimation method of a permanent magnet motor fed from a three-phase matrix converter using only its space vector PWM (SVPWM) sequence. The scheme employs measurements of the di/dt of the motor line currents to construct orthogonal ldquoresolver likerdquo position signals. In principle, the SVPWM waveforms provide sufficient excitation to extract the position...
This paper presents an enhanced method for both speed and rotor position estimation in induction motor drives. A modified INFORM method is used to excite magnetic saliencies in the motor created by saturation and rotor slotting, from which position signals can be derived. A new method is proposed for the elimination of second order saturation effects from position signals. This method significantly...
This paper reports the implementation of a sensorless control scheme for AC machines that requires neither a model observer nor a test-signal. The model is based on saliency detection through the use of fundamental PWM excitation and the measurement of the derivatives of the line currents induced by the PWM voltage vectors. Derivation of the rotor position is possible at low and zero speeds without...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.