Multi-phase transverse flux machine

• US 6,455,970 B1
• Filed: 09/19/2000
• Issued: 09/24/2002
• Est. Priority Date: 03/19/1998
• Status: Expired due to Term

• Current Assignee: Bombardier Transportation GmbH (Bombardier Incorporated)
• Original Assignee: Bombardier Transportation GmbH (Bombardier Incorporated)
• Inventors: Neudorfer, Harald, Shäfer, Uwe
• Primary Examiner(s): Ramirez, Nestor
• Assistant Examiner(s): JONES, JUDSON
• Application Number:
  US09/646,577
• Time in Patent Office: 735 Days
• Field of Search: 310/12, 310/13, 310/14, 310/254, 310/266, 310/179, 310/162, 310/156.02
• US Class Current: 310/179
• CPC Class Codes: H02K 17/16 having rotors with internally short-circuited windings, e.g. cage rotors
• CPC Class Codes: H02K 2201/12 Transversal flux machines
• CPC Class Codes: H02K 41/025 Asynchronous motors

Abstract

Described herein is a multi-phase transverse flux machine, which comprises a stator with essentially U-shaped and I-shaped cores (1, 2) of a soft-magnetic material and respectively one stator winding (3) for each phase that generates a magnetic flux in these cores, as well as a rotor with circular magnetic return path (4). The phases of the stator are magnetically separated. The rotor contains electrically conductive material (5, 6) in each of the phases, wherein the electrically conductive material of at least two phases is arranged and is interconnected in the rotor, such that if an alternating current flows through the stator windings of these phases, a current generating a starting torque for the rotor is induced in the electrically conductive material. The at least two phases thus electrically form a rotating magnetic field machine in the rotor. The rotating magnetic field can be generated in that the stator windings of the at least two phases are admitted with currents that are phase-displaced relative to each other. However, it is also possible for the electrically connected rotor poles of the at least two phases and/or the stator poles assigned to these phases to be geometrically displaced relative to each other. The transverse flux machine thus exhibits the operational behavior of an asynchronous machine, so that it can be operated without permanent magnets.

Claims

1. A multi-phase transverse flux machine, comprising a stator with essentially U-shaped and I-shaped cores (1, 2) of a soft-magnetic material and respectively one stator winding (3) for each phase that generates a magnetic flux in these cores, and a rotor with a circular magnetic return path (4) and wherein:

the stator phases are magnetically separated;

the rotor in each of the phases contains electrically conductive material (5, 6); and

the electrically conductive material (5, 6) of at least two phases is arranged and is interconnected in the rotor, such that if an alternating current flows through the stator windings (3) of these phases, a current that generates a starting torque for the rotor is induced in the electrically conductive material.

2. A transverse flux machine according to claim 1, wherein the stator windings (3) of the individual phases can be provided with currents, which are phase-displaced relative to each other.

3. A transverse flux machine according to claim 1, wherein the electrically connected rotor poles of the individual phases are geometrically displaced relative to each other.

4. A transverse flux machine according to claim 1, wherein the stator poles, which are assigned to the electrically connected rotor poles of the individual phases, are geometrically displaced relative to each other.

5. A transverse flux machine according to claim 1, wherein the electrically conductive material in the rotor forms a rotor cage (5) with two short-circuit rings (2) on the front.

6. A transverse flux machine according to claim 1, with a unilateral stator relative to the rotor.

7. A transverse flux machine according to claim 1, with a bilateral stator relative to the rotor.

8. A transverse flux machine according to claim 1, wherein the electrically conductive material (5, 6) of the rotor is connected to a slip ring for supplying electrical power from the outside.

9. A transverse flux machine according to claim 1, wherein the rotor performs a rotating movement.

10. A transverse flux machine according to claim 1, wherein the rotor performs a linear movement.

11. A transverse flux machine according to claim 1, wherein the soft-magnetic cores (1,2) of the stator and the magnetic return path (4) of the rotor are composed of layered sheets.