# US 2014/0191606 A1 · Multi-channel wound-field synchronous machine

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- Number: US 2014/0191606 A1
- Document ID: US20140191606A1
- Status: Published application
- Kind: A1
- Application number: 13/738,481
- Filed: 2013-01-10
- Published: 2014-07-10
- Earliest claimed: 2013-01-10
- Assignees: Hamilton Sundstrand Corporation
- Applicants: Hamilton Sundstrand Corporation
- Inventors: Jacek F. Gieras; Gregory I. Rozman
- Web page: https://patentgrep.com/patent/US20140191606A1

## CPC

- H02K 16/00: Machines with more than one rotor or stator {(machines for transmitting mechanical power from a driving shaft to a driven shaft and comprising structurally interrelated motor and generator parts H02K51/00; permanent magnet machines with multiple rotors or stators relatively rotated for vectorially combining the excitation fields or the armature voltages H02K21/029)}
- H02K 11/33: Drive circuits, e.g. power electronics (H02K11/38 takes precedence)
- H02K 15/06: Embedding prefabricated windings in the machines
- H02K 19/22: having windings each turn of which co-operates alternately with poles of opposite polarity, e.g. heteropolar generators
- H02K 19/38: Structural association of synchronous generators with exciting machines
- H02K 2213/06: Machines characterised by the presence of fail safe, back up, redundant or other similar emergency arrangements
- Y10T 29/49009: Dynamoelectric machine
- H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53})
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A multi-channel wound-field synchronous machine and method of assembling a multi-channel axial-flux wound-field synchronous machine are described. The machine includes an even number of stators and a plurality of field-excitation windings, each of the plurality of field-excitation windings being associated with a respective one of the stators. The machine also includes an exciter to feed all of the plurality of field-excitation windings.

## Claims

### Claim 1

A multi-channel axial-flux wound-field synchronous machine, comprising:
an even number of stators;
a plurality of field-excitation windings, each of the plurality of field-excitation windings being associated with a respective one of the stators; and
an exciter that feeds all of the plurality of field-excitation windings.

### Claim 2 (depends on 1)

The machine according to claim 1, wherein the exciter is a brushless exciter comprising a field excitation winding and a single-phase or poly-phase armature system.

### Claim 3 (depends on 2)

The machine according to claim 2, further comprising a hollow shaft configured to carry electrical connections between the single-phase or poly-phase armature system of the brushless exciter, rotating power electronics, and the plurality of field-excitation windings.

### Claim 4 (depends on 1)

The machine according to claim 1, further comprising a housing configured to enclose the stators and the plurality of field-excitation windings.

### Claim 5 (depends on 1)

The machine according to claim 1, further comprising one or more rotors, each of the one or more rotors associated with a respective pair of the stators.

### Claim 6 (depends on 1)

The machine according to claim 1, wherein two or more of the stators may be connected in parallel to provide a redundant power supply.

### Claim 7

A method of assembling a multi-channel axial-flux wound-field synchronous machine, the method comprising:
disposing an even number of poly-phase stators in a housing;
disposing a plurality of rotor field-excitation windings in the housing and associating each of the plurality of rotor field-excitation windings with a respective one of the stators; and
disposing an exciter in the housing, the exciter being coupled to the plurality of rotor field-excitation windings.

### Claim 8 (depends on 7)

The method according to claim 7, wherein disposing the exciter includes disposing a brushless exciter comprising a rotor field excitation winding and a single-phase or poly-phase armature system.

### Claim 9 (depends on 8)

The method according to claim 8, further comprising disposing a hollow shaft across the housing, the shaft carrying electrical connections between the single-phase or poly-phase armature system of the brushless exciter, rotating power electronics, and the plurality of rotor field-excitation windings.

### Claim 10 (depends on 7)

The method according to claim 7, further comprising disposing one or more rotors in the housing, each of the one or more rotors being associated with a respective pair of the poly-phase stators.

### Claim 11 (depends on 7)

The method according to claim 7, further comprising connecting two or more of the poly-phase stators in parallel to provide a redundant power supply.

### Claim 12 (depends on 7)

The method according to claim 7, further comprising providing each of the poly-phase stators as an individual power supply.