Granted Patent B2

US 12,395,027 · App. 17/997,915 · Granted Aug 19, 2025

Inventor: Martin Andreas Olsson (Lund, SE)

Assignee: Epinovatech AB

H02K3/28H02K17/14H02P25/22H03B5/24H02P2101/30H02P2207/01

Abstract

Claims (30)

1. An induction machine comprising:

a rotor;

a stator; and

a phase-shift oscillator;

wherein the stator comprises:

a first winding; and

a second winding, arranged at a first angle relative to said first winding;

wherein the phase-shift oscillator comprises:

a transistor, the transistor being a gallium nitride high-electron mobility transistor, GaN HEMT; and

a phase-shift network;

wherein the first winding is connected to a first node of the phase-shift network and wherein the second winding is connected to a second node of the phase-shift network, wherein the phase-shift oscillator is configured to provide a first phase electric signal at the first node and a second phase electric signal at the second node, wherein a difference between the first and second phase corresponds to the first angle, and wherein a rotating magnetic field is formed without a capacitor.

2. The induction machine according to claim 1 , wherein the first angle is 60 degrees.

3. The induction machine according to claim 1 , wherein the stator further comprises a third winding, arranged at a second angle relative to said first winding, wherein the third winding is connected to a third node of the phase-shift network, wherein the phase-shift oscillator is configured to provide a third phase electric signal at the third node, wherein a difference between the first and third phase corresponds to the second angle.

4. The induction machine according to claim 3 , wherein the second angle is 120 degrees.

5. The induction machine according to claim 1 , wherein the first winding is a dual pole winding and wherein the second winding is a dual pole winding.

6. The induction machine according to claim 1 , wherein the transistor is a power transistor.

7. The induction machine according to claim 1 , wherein the transistor comprises GaN.

8. The induction machine according to claim 1 , wherein the first winding and the second winding are configured to produce a magnetic field upon transmission of an electric current.

9. The induction machine according to claim 1 , further comprising a current rectifier, wherein the current rectifier is configured for regenerative charging.

10. The induction machine according to claim 1 , further comprising drive circuitry for driving the transistor of the phase-shift oscillator.

11. The induction machine according to claim 1 , wherein the first winding and/or the second winding comprise a superconductor.

12. The induction machine according to claim 11 , wherein the superconductor comprises V3Ga, Ga1-2xCuxAsxN, or NbN.

13. The induction machine according to claim 1 , configured to receive an alternating current input.

14. The induction machine according to claim 1 , wherein the phase-shift oscillator is configured to provide a 6-phase electric signal.

15. The induction machine according to claim 1 , configured to receive a 3-phase input electric signal.

16. An electric aircraft propulsion system comprising:

an induction machine according to claim 1 ;

an axle, physically connected to and concentrically aligned with the rotor;

an electrical battery, electrically connected to the induction machine; and

control circuitry, electrically connected to the induction machine, wherein the control circuitry is configured to control the induction machine.

Assignments (1)

Priority Claims (1)

Continuity (1)

References Cited (243)