Citation link:
Authors:
Рац, Емил; Ratz, Emil
Title:
Наблюдател на скорост за „летящ” старт на асинхронен двигател управляван с честотен преобразовател
Other Titles:
Speed observer for “flying” start of frequency inverter driven asynchronous motor
Date of Issue:
2008
Is Part of:
Proceedings of the Technical University – Sofia, 58(1), 2008, pp. 226-233
Publisher:
Технически университет - София
Identifiers:
1311-0829 [issn]
Type:
Article
Language:
bul
Abstract:
The paper presents an original approach for rotation speed valuation of asynchronous motors driven by frequency inverters. This method is considering the conductance properties of the asynchronous motor stator winding at supply frequencies close to the rotational frequency of the machine. The analysis of the complex conductance proves that it has a local minimum at conditions near by the electrical rotation frequency of the rotor. The minimum of the stator current space vector is obtained at constant supply of the stator winding and frequency variation. The supply frequency is scrolled from the absolute maximum value towards zero rotation frequency until the minimum is detected. The frequency of the obtained minimum corresponds to the real rotation frequency of the rotor. This approach does not require knowing the machine parameters and can be applied practically for any asynchronous motor. The application of this approach for speed valuation in practice also confirms it high reliability and gives possibility to start the drive at rotating motor conditions.
Description:
Рец. доц. д-р Михо Михов. - Съдържа диагр. и формули. – Библиогр., с. 233.
