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.
The control for a low-cost converter which consists of a half-bridge controlled rectifier and a four-switch three-phase inverter with two small film capacitors is presented, where a predictive controller is proposed to handle the large DC link voltage fluctuation, and a leading-angle flux-weakening method is used to control the converter to accomplish high speed operation of the IPMSM. Simulation...
This paper introduces the working principle and mathematical model of the servo electric load simulator, and puts forward a kind of intelligent controller based on improved wavelet neural network. Bang-Bang controller is used when the error is over the threshold, improved wavelet neural network and fuzzy compensation controller is used when the error is below the threshold; Considering the computational...
Based on the analysis of compressor load behaviors, a new three-phase startup strategy for permanent magnet synchronous motor (PMSM) compressor is presented, which includes parking, open-loop startup and closed-loop operation. When the speed loop closes, an improved method of flux estimation for PMSM compressor sensorless control is proposed, which accomplishes parking, efficient speed estimation...
The principle of position estimation and sensorless control of a matrix converter fed permanent magnet synchronous motor (PMSM) has been reported before, where the current derivatives of motor line currents were measured by di/dt sensors to construct position signals. This paper presents a different implementation that eliminates the di/dt sensors. The current derivatives are calculated by measuring...
It has been reported that the fundamental space vector PWM (SVPWM) waveforms of both a DC link voltage source inverter (VSI) and a matrix converter (MC) can be used as excitation signals for position estimation of a permanent magnet synchronous motor (PMSM). This paper evaluates the quality of the position estimates as well as the influence when the sensorless algorithm is implemented on a VSI and...
This paper describes a sensorless position estimation method for a permanent-magnet (PM) motor fed from a three-phase matrix converter using only its space-vector pulsewidth-modulation (SVPWM) sequence. The scheme employs measurements of dii/dt of the motor line currents to construct orthogonal ldquoresolverlikerdquo position signals. In principle, the SVPWM waveforms provide sufficient excitation...
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.