Abstract Agriculture is a socially significant sector of the economy. The growth agricultural production contributes to stable development society. It necessary use new mechanisms driven by induction motors increase productivity. Three-phase are mainly used in electric drive machines. At same time, it advisable single-phase network supply power remote farms. In this regard, using three-phase be...

The equations of unsymmetrical 2-phase induction motors are established and a computer representation is developed from these equations. Computer representation of single phase motors are developed by extension and modification of the unsymmetrical 2-phase induction motors representation. These equations of an unsymmetrical 2-phase induction motors are describe the dynamic performance of equati...

The reluctance synchronous motor (RSM) is a machine working on the basis of development of reluctance torque development. The rotor configuration with the salient poles is made from the rotor of asynchronous motor if some rotor teeth are symmetrically removed (mill out). A different air gap in d and q axis enables development of a reluctance torque. The rotor cage is asymmetrical because some b...

Effective condition monitoring of induction motors requires knowledge of the number of rotor slots and the rotor speed. These were primarily obtained in the literature by multiple measurements and using design knowledge of the motor under test. Furthermore, the earlier studies have mainly concentrated on stator current analysis. This paper investigates the use of the stator current, axial flux,...

The condition monitoring of the electrical machines can significantly reduce the costs of maintenance by allowing the early detection of faults, which could be expensive to repair. In this paper some results on non-invasive detection of broken rotor bars in squirrel-cage induction motors are presented. The applied method is the so-called motor current signature analysis (MCSA) which utilises th...

Purpose This paper aims to analyze the evolution and interaction over time of functions a technological innovation system (TIS) based on concept an motor. Design/methodology/approach It is case study associated with technology for producing cage-free pullets laying eggs in Pelotas/Rio Grande do Sul (RS). Findings The motors proposed by TIS approach evolve sequentially are cumulative causality m...

Typically, the rotor speed of electric motors was measured directly by use electromechanical sensors. Even though these devices are very precise, they also fragile and expensive to install. Currently, some alternatives based on estimations from measurement stator currents. Some these, accurate, used in variable drives. In industrial power applications, many large induction (IMs) driven with spe...

The article is devoted to the use of Park’s vector method for operational control rotor condition induction motors traction and auxiliary drives railway rolling stock. In course analysis, it was established that in order increase reliability efficiency operation vehicles, necessary improve implement diagnostic systems monitoring current state most damaged elements electric built into drive. Thi...

Vector control, also called fieldoriented control (FOC), is a Variable frequency Drive (VFD) control method in which the stator currents of a 3 phase induction motor are identified as two orthogonal components that can be visualized with a vector. The vector control of induction motors is one of the most suitable and popular speed control technique presently used. The vector control technique d...