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.
A simple but effective method to observe PMSM rotor position is presented in this paper. A high frequency voltage is injected into the motor and it will cause a little change of current signal because of the anisotropy of the machine. By processing the current in the armature, this method can calculate the rotor position accurately. This paper also presents a new way to observe the original rotor...
Position-sensorless BLDC motor gets a rapid development in recent years, but its start has been the focus and difficulties of the study. Whether the motor can get a normal start depends on the quality of the strategy of start. In this paper, there are analysis and comparison of a variety of methods of start brought forth by many scholars at home and abroad, and it also points out the quality of each...
Based on the traditional hysteretic current control, this paper presents a control approach using switching frequency closed-loop. A switching frequency feedback link is introduced to control the switching frequency dynamically. It solves the problem of the volatile switching frequency in hysteretic current control, as well as the slow current response of the fixed switching frequency current control...
An electronic voltage transformer based on WLAN technology is developed for adapting to the development trends of substations' synthesis automation. The transformer is composed of voltage-to-current conversion unit, signal processing unit and data transmitting unit. The voltage-to-current conversion unit converts high voltage signal to weak current signal. The signal processing unit amplifies weak...
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.