Induction motor having full pitch winding

Patent metadata

Field	Value
Publication number	US-9941761-B2
Application number	US-201514629276-A
Country	US
Kind code	B2
Filing date	Feb 23, 2015
Priority date	Feb 23, 2015
Publication date	Apr 10, 2018
Grant date	Apr 10, 2018

Abstract

A blower motor is provided for use in a machine. The motor includes a stator and a rotor rotatable about an axis. The stator includes a generally toroidal core, a first-main winding, and an auxiliary winding that is electrically out of phase with the first-main winding. The first-main winding and the auxiliary winding are both full pitch windings.

First claim

What is claimed is:

1. A blower motor for use in a machine, said motor comprising:
a stator; and
a rotor rotatable about an axis,
said stator including—
a generally toroidal core including a plurality of arcuately spaced apart teeth,
each pair of adjacent teeth defining a slot therebetween,
a first-main winding, and
an auxiliary winding that is electrically out of phase with the first-main winding,
said first-main winding including a plurality of first-main first coils wound about the core,
said first-main winding generating a plurality of first-main poles at respective arcuately spaced apart first-main pole locations,
each of said first-main first coils including a pair of arcuately spaced apart, generally axially extending first-main primary slot portions,
each of said first-main primary slot portions extending through a corresponding one of the slots,
each of said first-main pole locations coinciding with a corresponding one of the first-main primary slot portions such that the first-main winding is a full pitch winding,
said auxiliary winding including a plurality of auxiliary first coils wound about the core,
said auxiliary winding generating a plurality of auxiliary poles at respective arcuately spaced apart auxiliary pole locations,
each of said auxiliary first coils including a pair of arcuately spaced apart, generally axially extending auxiliary primary slot portions,
each of said auxiliary primary slot portions extending through a corresponding one of the slots,
each of said auxiliary pole locations coinciding with a corresponding one of the auxiliary primary slot portions such that the auxiliary winding is a full pitch winding,
each of said first-main first coils comprising a plurality of interconnected first-main first loops including a first-main innermost first loop, a first-main outermost first loop at least substantially circumscribing the first-main innermost first loop, and a first-main intermediate loop positioned between the first-main innermost first loop and the first-main outermost first loop,
each of said first-main innermost first loops including a pair of arcuately spaced apart, generally axially extending first-main innermost first slot portions,
each of said first-main intermediate first loops including a pair of arcuately spaced apart, generally axially extending first-main intermediate first slot portions,
each of said first-main innermost and intermediate first slot portions extending through a corresponding one of the slots,
each of said first-main outermost first loops presenting the first-main primary slot portions for that first-main first coil,
said first-main winding including a plurality of first-main second coils wound about the core,
said first-main second coils being alternately arcuately arranged with the first-main first coils,
each of said first-main second coils comprising a pair of interconnected first-main second loops including a first-main innermost second loop and a first-main outermost second loop at least substantially circumscribing the first-main innermost second loop,
each of said first-main innermost second loops including a pair of arcuately spaced apart, generally axially extending first-main innermost second slot portions,
each of said first-main outermost second loops including a pair of arcuately spaced apart, generally axially extending first-main outermost second slot portions,
each of said first-main innermost and outermost second slot portions extending through a corresponding one of the slots.

2. The motor as claimed in claim 1 ,
said first-main innermost and outermost second loops of each of the first-main second coils respectively circumscribing two and four of the teeth.

3. A blower motor for use in a machine, said motor comprising:
a stator; and
a rotor rotatable about an axis,
said stator including—
a generally toroidal core including a plurality of arcuately spaced apart teeth,
each pair of adjacent teeth defining a slot therebetween,
a first-main winding, and
an auxiliary winding that is electrically out of phase with the first-main winding,
said first-main winding including a plurality of first-main first coils wound about the core,
said first-main winding generating a plurality of first-main poles at respective arcuately spaced apart first-main pole locations,
each of said first-main first coils including a pair of arcuately spaced apart, generally axially extending first-main primary slot portions,
each of said first-main primary slot portions extending through a corresponding one of the slots,
each of said first-main pole locations coinciding with a corresponding one of the first-main primary slot portions such that the first-main winding is a full pitch winding,
said auxiliary winding including a plurality of auxiliary first coils wound about the core,
said auxiliary winding generating a plurality of auxiliary poles at respective arcuately spaced apart auxiliary pole locations,
each of said auxiliary first coils including a pair of arcuately spaced apart, generally axially extending auxiliary primary slot portions,
each of said auxiliary primary slot portions extending through a corresponding one of the slots,
each of said auxiliary pole locations coinciding with a corresponding one of the auxiliary primary slot portions such that the auxiliary winding is a full pitch winding,
each of said auxiliary first coils comprising a plurality of interconnected auxiliary first loops including an auxiliary innermost first loop, an auxiliary outermost first loop at least substantially circumscribing the auxiliary innermost first loop, and an auxiliary intermediate first loop positioned between the auxiliary innermost first loop and the auxiliary outermost first loop,
each of said auxiliary innermost first loops including a pair of arcuately spaced apart, generally axially extending auxiliary innermost first slot portions,
each of said auxiliary intermediate first loops including a pair of arcuately spaced apart, generally axially extending auxiliary intermediate first slot portions,
each of said auxiliary innermost and intermediate first slot portions extending through a corresponding one of the slots,
each of said auxiliary outermost first loops presenting the auxiliary primary slot portions for that auxiliary first coil,
said auxiliary winding including a plurality of auxiliary second coils wound about the core,
said auxiliary second coils being alternately arcuately arranged with the auxiliary first coils,
each of said auxiliary second coils comprising a pair of interconnected auxiliary second loops including an auxiliary innermost second loop and an auxiliary outermost second loop at least substantially circumscribing the auxiliary innermost second loop,
each of said auxiliary innermost second loops including a pair of arcuately spaced apart, generally axially extending auxiliary innermost second slot portions,
each of said auxiliary outermost second loops including a pair of arcuately spaced apart, generally axially extending auxiliary outermost second slot portions,
each of said auxiliary innermost and outermost second slot portions extending through a corresponding one of the slots.

4. The motor as claimed in claim 3 ,
said auxiliary innermost and outermost second loops of each of the auxiliary second coils respectively circumscribing two and four of the teeth.

5. A blower motor for use in a machine, said motor comprising:
a stator; and
a rotor rotatable about an axis,
said stator including—
a generally toroidal core including a plurality of arcuately spaced apart teeth,
each pair of adjacent teeth defining a slot therebetween,
a first-main winding, and
an auxiliary winding that is electrically out of phase with the first-main winding,
said first-ma

Assignees

• Nidec Motor Corp

Inventors

• Bastien Ryan M
• Vehige Joseph A
• Hussey John H
• Hoemann Keith I

Classifications

• H02K3/28 Primary

  Layout of windings or of connections between windings (windings for pole-changing H02K17/06, H02K17/14, H02K19/12, H02K19/32) · CPC title

• H02K3/16

  for auxiliary purposes, e.g. damping or commutating · CPC title

• H02K7/14

  Structural association with mechanical loads, e.g. with hand-held machine tools or fans (with fan or impeller for cooling the machine H02K9/06) · CPC title

• F04D25/0606

  the electric motor being specially adapted for integration in the pump · CPC title

• F04D25/08

  the working fluid being air, e.g. for ventilation · CPC title