Winding configuration electric motor

Patent metadata

Field	Value
Publication number	US-10693336-B2
Application number	US-201715612178-A
Country	US
Kind code	B2
Filing date	Jun 2, 2017
Priority date	Jun 2, 2017
Publication date	Jun 23, 2020
Grant date	Jun 23, 2020

Abstract

A stator assembly for a permanent magnet motor is disclosed. The assembly comprises a yoke comprising a plurality of teeth in connection therewith and extending into an opening formed by the yoke. The plurality of teeth comprises a first tooth and a second tooth. The first tooth is arranged adjacent to the second tooth about a rotational axis of the motor. The assembly further comprises a first coil and a second coil. The first coil comprises a first conductive winding having a first number of turns disposed around the first tooth, and the second coil comprises a second conductive winding having a second number of turns disposed around the second tooth. The first number of turns is different from the second number of turns.

First claim

The invention claimed is:

1. A stator for a permanent magnet motor, comprising:
a yoke comprising an outer support and forming an opening configured to receive a rotor comprising a plurality of permanent magnets disposed in a plurality of rotor slots;
a first tooth extending into the opening and comprising a first stem portion and a first arc portion, wherein the first arc portion extends from the first stem portion over a first extension length forming a first receiving region configured to accommodate a first number of turns of a first stator coil of a first electrical phase of a power supply; and
a second tooth extending into the opening adjacent the first tooth and comprising a second stem portion and a second arc portion, wherein the second arc portion extends from the second stem portion over a second extension length forming a second receiving region configured to accommodate a second number of turns of a second stator coil of a second electrical phase of the power supply;
wherein the first extension length is different than the second extension length, wherein the difference is based on a turn ratio between the first number of turns to the second number of turns, wherein the stator is configured to receive three winding phases comprising the first winding phase, the second winding phase, and a third winding phase, wherein each of the adjacent pairs of the stator teeth comprise two of the three winding phases, and wherein each of the first number of turns and the second number of turns are evenly distributed among the three winding phases connected to the adjacent pairs of stator teeth about the opening formed by the stator.

2. The stator according to claim 1 , wherein the turn ratio between the first number of turns to the second number of turns is at least 2:1.

3. The stator according to claim 1 , wherein the first tooth and the second tooth form an adjacent pair of stator teeth.

4. The stator according to claim 3 , wherein the stator comprises a plurality of the adjacent pairs of the stator teeth distributed around the opening and forming a cylindrical opening configured to receive a rotor.

5. The stator according to claim 4 , wherein the plurality of adjacent pairs of the stator teeth are evenly spaced around the opening and separated by a plurality of stator slots.

6. A stator assembly for a permanent magnet motor, comprising:
a yoke forming an outer support configured to receive a rotor comprising a plurality of permanent magnets disposed in a plurality of rotor slots;
a plurality of teeth in connection with the yoke and extending into an opening formed by the yoke, the plurality of teeth comprising a first tooth and a second tooth, wherein the first tooth is arranged adjacent to the second tooth about a rotational axis of the motor and wherein:
the first tooth comprises a first stem portion extending into the opening from the yoke to a first distal end portion forming a first arc portion, wherein the first stem portion and the first arc portion form a first receiving region configured to accommodate the first number of turns of the first coil; and
the second tooth comprises a second stem portion extending into the opening from the yoke to a second distal end portion forming a second arc portion, wherein the second stem and the second arc form a second receiving region configured to accommodate the second number of turns of the second coil;
a first coil in connection with a first electrical phase comprising a first conductive winding having a first number of turns disposed around the first tooth;
a second coil in connection with a second electrical phase comprising a second conductive winding having a second number of turns disposed around the second tooth, wherein the first number of turns is different from the second number of turns; and
wherein the stator assembly is configured to receive three winding phases comprising the first winding phase, the second winding phase, and a third winding phase, wherein each of the first number of turns and the second number of turns are evenly distributed among the three winding phases connected to the adjacent pairs of stator teeth about the opening formed by the stator.

7. The stator assembly according to claim 6 , wherein the plurality of teeth comprise the first tooth and the second tooth formed in a plurality of pairs of adjacent teeth equally spaced around the yoke.

8. The stator assembly according to claim 6 , wherein the first number of turns of the first coil comprises at least twice as many turns as the second number of turns.

9. The stator assembly according to claim 6 , wherein the first receiving region is larger than the second receiving region.

Assignees

• Whirlpool Co

Inventors

• Deng Fang

Classifications

• H02K1/146 Primary

  consisting of a generally annular yoke with salient poles · CPC title

• H02K3/18

  Windings for salient poles · CPC title

• 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