Axial gap electrical machine

• US 9,825,499 B2
• Filed: 07/29/2015
• Issued: 11/21/2017
• Est. Priority Date: 05/24/2001
• Status: Expired due to Fees

• Current Assignee: Arjuna Indraeswaran Rajasingham
• Original Assignee: Arjuna Indraeswaran Rajasingham
• Inventors: Rajasingham, Arjuna Indraeswaran
• Primary Examiner(s): Lam, Thanh
• Application Number:
  US14/812,062
• Publication Number:
  US 20150381003A1
• Time in Patent Office: 846 Days
• Field of Search: 310179-180, 310184, 310198, 310201, 310203, 310208, 310268, 310 81
• CPC Class Codes: H02K 1/32 with channels or ducts for flow of cooling medium
• CPC Class Codes: H02K 21/24 with magnets axially facing the armatures, e.g. hub-type cycle dynamos
• CPC Class Codes: H02K 3/02 Windings characterised by the conductor material
• CPC Class Codes: H02K 3/18 Windings for salient poles
• 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
• CPC Class Codes: H02K 5/18 with ribs or fins for improving heat transfer
• CPC Class Codes: H02K 9/227 Heat sinks

Abstract

An axial gap electrical machine employs unique architecture to (1) overcome critical limits in the air gap at high speeds, while maintaining high torque performance at low speeds, while synergistically providing a geometry that withstands meets critical force concentration within these machines, (2) provides arrangements for cooling said machines using either a Pelletier effect or air fins, (3) “windings” that are produced as ribbon or stampings or laminates, that may be in some cases be arranged to optimize conductor and magnetic core density within the machine. Arrangements are also proposed for mounting the machines as wheels of a vehicle, to provide ease of removing and installing said motor.

Claims

1. An axial gap machine comprising a rotor with a magnetic flux path and a stator comprising windings that generate a magnetic field,

wherein each of said windings is attached to an oscillator,

and wherein the phase gap between oscillators of adjoining windings result in a phase change of one or more times 360 degrees,

and wherein the windings comprise one or more turns with each turn comprising a first active conductor and a second active conductor, wherein adjoining first active conductors generate a first toroid about the axis of the machine and the second active conductors generate a second toroid about the axis of the machine, wherein the first and second toroid lie adjoining each other with the common axis of the machine,

and wherein said first and second toroid are generated by adjacent and contiguous turns in the same common direction,

and wherein the excitation of the oscillators provide a rotating field in the windings that engage the flux path of the rotor thereby rotating the rotor.

2. An axial gap machine as in claim 1, wherein each of said windings comprise a single turn, each with a first and a second conductor with connectors at each end connected to an oscillator.

3. An axial gap machine as in claim 1, wherein each of said windings comprise one or more (n) turns, each with a first and a second conductor with connectors at each end of each of the windings connected to an oscillator.

4. An axial gap machine as in claim 3, wherein the width of each of the windings and the resulting angle generated on said first and second toroids, is variable to allow selection of each of several pre-defined numbers of turns per winding to meet temporal needs of the machine, by interconnection of the turns together in one of a series and parallel configuration, in each of the windings, and using the connectors at the end of the windings to attach to the oscillator,

wherein for each of the selections from the several pre-defined number of turns per winding, the cumulative angle of the windings are one or more times 360 degrees.

5. An axial gap machine as in claim 1, wherein said oscillator is a controller.

6. An axial gap machine comprising a rotor with a magnetic flux path and a stator comprising windings that generate a magnetic field,

wherein each of said windings is attached to an oscillator,

and wherein the phase gap between oscillators of adjoining windings result in a phase change of one or more times 360 degrees,

and wherein the windings comprise one or more turns with each turn comprising a first active conductor and a second active conductor, wherein adjoining first active conductors generate a first toroid about the axis of the machine and the second active conductors generate a second toroid about the axis of the machine, wherein the first and second toroid lie adjoining each other with the common axis of the machine,

and wherein said first and second toroid are generated by adjacent and contiguous turns in the same common direction,

and wherein the excitation of the oscillators provide a rotating field in the windings that engage the flux path of the rotor, and wherein the phase angle of the oscillator excitation may be controlled with capacitive loads to permit operation as a motor or a generator.