# US 2020/0224584 A1 · Supercharger

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- Number: US 2020/0224584 A1
- Document ID: US20200224584A1
- Status: Published application
- Kind: A1
- Application number: 16/650,630
- Filed: 2017-09-25
- Published: 2020-07-16
- Earliest claimed: 2017-09-25
- Assignees: Mitsubishi Heavy Industries Engine & Turbocharger, Ltd.; Technelec Ltd
- Applicants: Mitsubishi Heavy Industries Engine & Turbocharger, Ltd.; Technelec Ltd.
- Inventors: Yukio YAMASHITA; Byeongil AN; Naomichi SHIBATA; Charles POLLOCK; Helen POLLOCK
- Web page: https://patentgrep.com/patent/US20200224584A1

## CPC

- F02B 33/40: of non-positive-displacement type
- F04D 25/06: the pump being electrically driven (F04D25/08 takes precedence)
- F04D 29/18: Rotors (specially for elastic fluids F04D29/26)
- H02K 1/14: Stator cores with salient poles
- H02K 3/52: Fastening salient pole windings or connections thereto
- H02K 7/14: Structural association with mechanical loads, e.g. with hand-held machine tools or fans (with fan or impeller for cooling the machine H02K9/06)
- H02K 11/30: Structural association with control circuits or drive circuits
- H02K 19/06: Motors having windings on the stator and a variable-reluctance soft-iron rotor without windings, e.g. inductor motors
- H02K 37/04: with rotors situated within the stators
- H02K 3/28: Layout of windings or of connections between windings (windings for pole-changing H02K17/06, H02K17/14, H02K19/12, H02K19/32)
- F02B: INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL (gas-turbine plants F02C; hot-gas or combustion-product positive-displacement engine plants F02G)
- F04D: NON-POSITIVE-DISPLACEMENT PUMPS (engine fuel-injection pumps F02M; ion pumps H01J41/12; electrodynamic pumps H02K44/02)
- H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53})

## Abstract

A supercharger includes a magnetic flux switching motor and a wheel. The motor includes a rotor; a stator stores the rotor therein and includes stator projecting portions projecting inward in a radial direction from an internal circumferential portion toward the rotor; a field source provided in a field slot formed between the stator projecting portions to generate a magnetic field of a constant direction; an armature coil provided in an armature slot; and a controller applying a single-phase current to the armature coil and changing a direction of the applied single-phase current to change a direction of a magnetic field generated from the armature coil and rotate the rotor. The wheel is attached to the rotor, and rotates together with rotation of the rotor to compress the air.

## Claims

### Claim 1

A supercharger comprising:
a magnetic flux switching motor; and
a wheel,
wherein the magnetic flux switching motor includes
a rotor;
a stator that is an annular member storing the rotor to make the rotor rotatable therein and includes a plurality of stator projecting portions projecting inward in a radial direction from an internal circumferential portion toward the rotor;
a field source that is provided in a field slot serving as a part of a plurality of slots formed between the stator projecting portions to generate a magnetic field of a constant direction;
an armature coil that is provided in an armature slot serving as another of the slots; and
a controller that applies a single-phase current to the armature coil and changes a direction of the applied single-phase current to change a direction of a magnetic field generated from the armature coil and rotate the rotor, and
the wheel is attached to the rotor, and rotates together with rotation of the rotor to compress the air.

### Claim 2 (depends on 1)

The supercharger according to claim 1, wherein the controller stops the rotor at one of a plurality of stop positions determined in a circumferential direction by applying a stop current flowing in a constant direction to the armature coil, in response to receiving an instruction to stop rotation of the rotor.

### Claim 3 (depends on 2)

The supercharger according to claim 2, wherein the controller starts the rotor by applying a current of a direction opposite to the stop current to the armature coil, in response to receiving an instruction to start the rotor.

### Claim 4 (depends on 1)

The supercharger according to claim 1, wherein the field source is a permanent magnet.

### Claim 5 (depends on 1)

The supercharger according to claim 1, wherein the field source is a field coil to which a current of a constant direction is applied.

### Claim 6 (depends on 1)

The supercharger according to claim 1, wherein the armature coil is wound around a plurality of the stator projecting portions in a wave-winding manner.