Extension of the Unified Theory of Electical Machines: Space harmonic effects in 3-phase slip-ring induction motors

1981 ◽  
Vol 63 (2) ◽  
pp. 63-67 ◽  
Author(s):  
P. Vas
Keyword(s):  
Induction Motors ◽  
Unified Theory ◽  
Phase Slip ◽  
Space Harmonic ◽  
Slip Ring

Transient performance of series connected three phase slip-ring induction motors

1998 ◽  
Vol 13 (4) ◽  
pp. 305-310 ◽  
Author(s):  
M.A. Badr ◽  
A.I. Alolah ◽  
A.F. Almarshood
Keyword(s):  
Induction Motors ◽  
Phase Slip ◽  
Transient Performance ◽  
Slip Ring ◽  
Three Phase

A solid-state tachometer for three-phase slip-ring induction motors

1981 ◽  
Vol 51 (3) ◽  
pp. 231-234 ◽  
Author(s):  
P. S. SRINIVASAN ◽  
C. VELAYUDHAN
Keyword(s):  
Solid State ◽  
Induction Motors ◽  
Phase Slip ◽  
Slip Ring ◽  
Three Phase

Sources of harmonic currents in slip-ring induction motors

1974 ◽  
Vol 121 (12) ◽  
pp. 1495 ◽  
Author(s):  
A.K. Wallace ◽  
E.S. Ward ◽  
A. Wright
Keyword(s):  
Induction Motors ◽  
Harmonic Currents ◽  
Slip Ring

scholarly journals Issues of Exploitation of Induction Motors in the Course of Underground Mining Operations

2017 ◽  
Vol 62 (3) ◽  
pp. 579-596 ◽  
Author(s):  
Stanisław Gumula ◽  
Wiktor Hudy ◽  
Malgorzata Piaskowska-Silarska ◽  
Krzysztof Pytel
Keyword(s):  
Induction Motors ◽  
Underground Mining ◽  
Mechanical Energy ◽  
Mining Industry ◽  
Electrical Energy ◽  
Mining Operations ◽  
Slip Ring ◽  
Input Signals ◽  
Large Distortion ◽  
Oriented System

Abstract Mining industry is one of the most important customers of electric motors. The most commonly used in the contemporary mining industry is alternating current machines used for processing electrical energy into mechanical energy. The operating problems and the influence of qualitative interference acting on the inputs of individual regulators to field-oriented system in the course of underground mining operations has been presented in the publication. The object of controlling the speed is a slip-ring induction motor. Settings of regulators were calculated using an evolutionary algorithm. Examination of system dynamics was performed by a computer with the use of the MATLAB / Simulink software. According to analyzes, large distortion of input signals of regulators adversely affects the rotational speed that pursued by the control system, which may cause a large vibration of the whole system and, consequently, its much faster destruction. Designed system is characterized by a significantly better resistance to interference. The system is stable with the properly selected settings of regulators, which is particularly important during the operation of machinery used in underground mining.

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