Hybrid surface magnet machine

Patent metadata

Field	Value
Publication number	US-10003291-B2
Application number	US-201715693923-A
Country	US
Kind code	B2
Filing date	Sep 1, 2017
Priority date	Mar 25, 2014
Publication date	Jun 19, 2018
Grant date	Jun 19, 2018

Abstract

A hybrid electrical machine containing surface mounted magnets which includes a magnetically permeable cylindrically shaped stator assembly having at least one stator winding formed about a plurality of stator teeth, a rotor assembly concentrically disposed within the stator assembly, including a magnetically permeable rotor backiron, a rotational drive mechanism coupled to the rotor backiron, and a plurality of protruding rotor poles, each including a magnetically permeable pole support assembly, a winding provided around the pole support assembly, and a radially magnetized permanent magnet assembly disposed about the pole support assembly.

First claim

The invention claimed is:

1. A hybrid electrical machine containing surface mounted magnets, comprising:
a magnetically permeable cylindrically shaped stator assembly having at least one stator winding formed about a plurality of stator teeth, the stator assembly configured to remain stationary;
a rotor assembly concentrically disposed within the stator assembly, the rotor assembly comprising
a magnetically permeable rotor backiron formed in shape of a cylindrical body,
a rotational drive mechanism coupled to the rotor backiron and configured to rotate in association with the rotor backiron, and
a plurality of protruding rotor poles, each protruding rotor pole comprising
a magnetically permeable pole support assembly,
a winding provided around the pole support assembly, and
a radially magnetized permanent magnet assembly disposed about the pole support assembly,
wherein the pole support assembly includes a T-shaped pole support,
wherein the radially magnetized permanent magnet assembly comprises a plurality of permanent magnets, wherein each permanent magnet of the plurality of permanent magnets is on each side of the T-shaped pole support, wherein the each permanent magnet of the plurality of permanent magnets is not in physical contact with the T-shaped pole support; and
a spacer between each permanent magnet of the plurality of permanent magnets and the T-shaped pole support.

2. The hybrid electrical machine of claim 1 , wherein the T-shaped pole support includes side bars.

3. An energy conversion system, comprising:
a mechanical arrangement configured to i) provide mechanical power in a power generation mode, and ii) receive mechanical power in a motoring mode; and
a hybrid electrical machine comprising
a magnetically permeable cylindrically shaped stator assembly having at least one stator winding formed about a plurality of stator teeth, the stator assembly configured to remain stationary,
a rotor assembly concentrically disposed within the stator assembly, the rotor assembly comprising
a magnetically permeable rotor backiron formed in shape of a cylindrical body,
a rotational drive mechanism coupled to the rotor backiron and configured to rotate in association with the rotor backiron, and
a plurality of protruding rotor poles, each protruding rotor pole comprising
a magnetically permeable pole support assembly,
a winding provided around the pole support assembly, and
a radially magnetized permanent magnet assembly disposed about the pole support assembly,

the mechanical arrangement coupled to the rotational drive mechanism,
wherein the pole support assembly includes a T-shaped pole support,
wherein the radially magnetized permanent magnet assembly comprises a plurality of permanent magnets, wherein each permanent magnet of the plurality of permanent magnets is on each side of the T-shaped pole support, wherein the each permanent magnet of the plurality of permanent magnets is physically disjointed with the T-shaped pole support; and

a spacer between each permanent magnet of the plurality of permanent magnets and the T-shaped pole support.

4. The energy conversion system of claim 3 , wherein the T-shaped pole support includes side bars.

5. A hybrid electrical machine containing surface mounted magnets, comprising:
a magnetically permeable cylindrically shaped stator assembly having at least one stator winding formed about a plurality of stator teeth, the stator assembly configured to remain stationary;
a rotor assembly concentrically disposed within the stator assembly, the rotor assembly comprising
a magnetically permeable rotor backiron formed in shape of a cylindrical body,
a rotational drive mechanism coupled to the rotor backiron and configured to rotate in association with the rotor backiron, and
a plurality of protruding rotor poles, each protruding rotor pole comprising
a magnetically permeable pole support assembly, wherein the magnetically permeable pole support assembly comprises a pole body and a pole shoe, wherein the pole shoe comprises a plurality of recesses,
a winding provided around the pole body of the magnetically permeable pole support assembly, and
a plurality of permanent magnets, wherein each permanent magnet of the plurality of permanent magnets is over each recess of the plurality of recesses of the pole shoe.

6. The hybrid electrical machine of claim 5 , further comprising a spacer between each permanent magnet of the plurality of permanent magnets and a sidewall of a respective recess of the plurality of recesses.

Assignees

• Purdue Research Foundation

Inventors

• Sudhoff Scott
• Pekarek Steve
• Laldin Omar Abdul

Classifications

• H02P25/024

  controlled by supply frequency · CPC title

• H02P25/022

  Synchronous motors (H02P25/064 takes precedence) · CPC title

• H02P23/009 Primary

  using field weakening · CPC title

• H02K21/042

  with permanent magnets and field winding both rotating · CPC title

• H02K16/02

  Machines with one stator and two {or more} rotors · CPC title