COIL

• US 20150061450A1
• Filed: 12/13/2012
• Published: 03/05/2015
• Est. Priority Date: 03/29/2012
• Status: Active Grant

• Current Assignee: Aisin AW Company Limited (Aisin Corp.)
• Original Assignee: Aisin AW Company Limited (Aisin Corp.)
• Inventors: Nakagawa, Yoshinari
• Granted Patent: US 9,847,685 B2
• Time in Patent Office: Days
• US Class Current: 310/198
• CPC Class Codes: H02K 3/12 arranged in slots
• CPC Class Codes: H02K 3/28 Layout of windings or of connections between windings windings for pole-changing H02K17/06, H02K17/14, H02K19/12, H02K19/32

Abstract

A coil that is wound around a core having a plurality of slots arranged so as to be distributed in a circumferential direction of a cylindrical core reference plane, and that has N (where N is an integer of 2 or more) star connections. Each of the N star connections includes three phase coil portions corresponding to respective three phases, and first ends of the three phase coil portions are connected together at a neutral point that is formed independently for each of the star connections, second ends of the N phase coil portions of the same phase which are included in the different star connections are connected to each other, a phase coil placement region where the phase coil portion is placed is designed to be continuous in the circumferential direction.

Claims

1. A coil that is wound around a core having a plurality of slots arranged so as to be distributed in a circumferential direction of a cylindrical core reference plane, and that has N (where N is an integer of 2 or more) star connections, wherein

each of the N star connections includes three phase coil portions corresponding to respective three phases, and first ends of the three phase coil portions are connected together at a neutral point that is formed independently for each of the star connections,

second ends of the N phase coil portions of the same phase which are included in the different star connections are connected to each other,

a phase coil placement region where the phase coil portion is placed is designed to be continuous in the circumferential direction, and is disposed so as not to overlap the phase coil placement region where the other (N−

1) phase coil portion of the same phase is placed, as viewed in a radial direction, and

a center position in the circumferential direction of each of the phase coil portions is designed to be located 120°

away in the circumferential direction from center positions in the circumferential direction of the phase coil portions of the other phases which are included in the same star connection.

2. The coil according to claim 1, wherein

the phase coil portion includes a plurality of unit coil portions each having a plurality of turns between a pair of slots or having pluralities of turns between multiple pairs of slots, and

the plurality of unit coil portions included in the same phase coil portion are arranged in the same order in the circumferential direction as order of electrical connection.

3. The coil according to claim 1, wherein

the phase coil placement region where the phase coil portion is placed is disposed so as to partially overlap the phase coil placement regions where the phase coil portions of the other phases are placed, as viewed in the radial direction.

4. The coil according to claim 2, wherein

the phase coil placement region where the phase coil portion is placed is disposed so as to partially overlap the phase coil placement regions where the phase coil portions of the other phases are placed, as viewed in the radial direction.