FIELD: electricity.
SUBSTANCE: invention refers to peculiar features of the design of electric machines with contact rings and can be used in automation systems as traction controlled and non-controlled electric drives, wind generators, hydraulic generators, high-frequency electric generators, multi-phase synchronous electric motors and electric generators of frequency converters, as well as multi-phase power sources of electric current. The proposed electric machine with modulated magnetomotive force of armature includes stator the armature core of which consists of isolated electrotechnical steel sheets with high magnetic permeability and has salient poles with coil m-phase winding of armature, each coil of which is arranged on the appropriate salient pole of armature, one per a pole, and rotor containing charged inductor core made of electrotechnical steel sheets with high magnetic permeability; the above inductor has salient poles and coil excitation winding, and each coil of which is arranged on the appropriate salient pole of inductor, one per a pole. When direct (rectified) current flows via excitation winding of inductor, alternating polarity of N - S magnetic inductor poles appears in air gap. Coils of armature winding in phase are connected to each other in opposite way in magnetic ratio; alternation of beginnings of phases in connection circuit of armature winding coils is made in certain way, and there are certain ratios between the number of salient armature poles, the number of phases of m - phase armature winding, the number of salient armature poles in phase and number of salient poles of inductor.
EFFECT: high energy data, high specific torque moment on the shaft in electric motor mode and high specific power in electric generator mode at reduction of torque moment pulsations, vibration and noise of electric machine owing to its multi-phase design with modulated magnetomotive force of armature, and excitation winding of inductor allows smooth controlling the output parametres of the machine.
12 cl, 5 dwg
