# US 2017/0288516 A1 · Stationary coil support for a brushless alternator and a brushless alternator comprising the same

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- Number: US 2017/0288516 A1
- Document ID: US20170288516A1
- Status: Published application
- Kind: A1
- Application number: 15/477,743
- Filed: 2017-04-03
- Published: 2017-10-05
- Earliest claimed: 2016-04-04
- Assignees: Dixie Electric Ltd.
- Applicants: Dixie Electric Ltd.
- Inventors: Bogdan Ionele
- Web page: https://patentgrep.com/patent/US20170288516A1

## CPC

- H02K 19/24: with variable-reluctance soft-iron rotors without winding
- H02K 3/46: Fastening of windings on the stator or rotor structure
- H02K 1/22: Rotating parts of the magnetic circuit
- H02K 19/16: Synchronous generators
- H02K 19/38: Structural association of synchronous generators with exciting machines
- H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53})

## Abstract

An alternator with a longer stationary coil support or bobbin and rotor axial and components thereof are provided.

## Claims

### Claim 1

A claw type, brushless alternator comprising:
a drive end frame having a stationary coil assembly mounted thereto; the stationary coil assembly comprising a hollow bobbin and stationary coil wound thereon;
a stator circumscribing the stationary coil assembly such that a gap is provided between the stationary coil assembly and the stator;
a rotor assembly having a rotor shaft with pair of opposing claw type poles mounted thereon;
wherein each claw type pole has a plurality of fingers; wherein upon installation into the alternator, the rotor shaft is mounted through the hollow bobbin and the plurality of fingers are sandwiched between the stationary coil assembly and the stator.

### Claim 2 (depends on 1)

The claw type, brushless alternator of claim 1; wherein the rotor shaft is steel.

### Claim 3 (depends on 1)

The claw type, brushless alternator of claim 1; wherein the stationary coil is a copper wire coil.

### Claim 4 (depends on 1)

The claw type, brushless alternator of claim 1, wherein the bobbin is a steel bobbin.

### Claim 5 (depends on 1)

The claw type, brushless alternator of claim 1, wherein the hollow bobbin is mounted directly to the drive end frame.

### Claim 6

A bobbin assembly for use in a claw type, brushless alternator, the brushless alternator having a drive end frame and drive end bearing, the bobbin assembly comprising:
a hollow bobbin with lips at each end of the hollow bobbin and defining a coil winding surface; and
a stationary coil wound on the hollow bobbin;
wherein one lip of the bobbin is configured for direct mounting to the drive end frame of the alternator and comprises a surface to support the drive end bearing.

### Claim 7 (depends on 6)

The bobbin assembly of claim 6, wherein the drive end lip of the bobbin stepped.

### Claim 8 (depends on 7)

The bobbin assembly of claim 7, wherein the step is configured engage a corresponding step of the drive end frame.

### Claim 9 (depends on 6)

The bobbin assembly of claim 6, wherein each lip of the bobbin comprises an inclined surface resulting in the coil winding surface including sloped faces.

### Claim 10 (depends on 6)

A claw type, brushless alternator comprising:
a drive end frame having a stationary coil assembly mounted thereto; the stationary coil assembly comprising the bobbin assembly of claim 6;
a stator circumscribing the stationary coil assembly such that a gap is provided between the stationary coil assembly and the stator;
a rotor assembly having a rotor shaft with pair of opposing claw type poles mounted thereon;
wherein each claw type pole has a plurality of fingers; wherein upon installation into the alternator, the rotor shaft is mounted through the hollow bobbin and the plurality of fingers are sandwiched between the stationary coil assembly and the stator.

### Claim 11

A bobbin for use in a claw type, brushless alternator, the brushless alternator having a drive end frame and drive end bearing, the bobbin comprising:
a hollow cylinder with lips at each end of the hollow cylinder and defining a coil winding surface;
wherein one lip of the bobbin is configured for direct mounting to the drive end frame of the alternator and comprises a surface to support the drive end bearing.

### Claim 12 (depends on 11)

The bobbin of claim 11, wherein the drive end lip of the bobbin stepped.

### Claim 13 (depends on 12)

The bobbin of claim 12, wherein the step is configured engage a corresponding step of the drive end frame.

### Claim 14 (depends on 11)

The bobbin of claim 11, wherein each lip of the bobbin comprises an inclined surface resulting in the coil winding surface including sloped faces.