JPS55114156A - Armature winding for rotary electric machine - Google Patents

Abstract

PURPOSE: To economically manufacture a rotary electric machine by so winding an armature winding that the number of slots at every pole and phase become the integer times of 4 and connecting the windings to become balanced windings so that the number of parallel circuits becomes twice of the divisor of the number of the poles but is not the divisor of the number of the poles.

CONSTITUTION: An armature winding is wound on an armature which has, for example, six poles (its prime divisors are 6, 3, 2 and 1), four parallel circuits, 72 of total number of slots, and 4 of the number of slots per pole and phase. In this case, upper windings are so wound that two of four windings as disposed at both sides are wound in the phase U₁ and the other two disposed at the center are wound in the phase U₂, and lower windings are so wound that two disposed at both sides of four windings are wound in the phase U₂ and the other two disposed at the center are wound in the phase U₁ to form two parallel circuits balanced in the range of 180° of mechanical angle. The residual two parallel circuits U₃, U₄ of four parallel circuits are disposed point symmetrically with the phases U₁, U₂ with reverse polarity thereto. Thus, it can increase the freedom degree of designing the terminal voltage and parallel revolving current and the like of a rotary electric machine.

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