# US 7,408,276 B2 · Plane motor device with surrounding member surrounding coil unit and with cooling channel provided within surrounding member

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- Number: US 7,408,276 B2
- Document ID: US7408276B2
- Status: Granted
- Kind: B2
- Application number: 10/832,361
- Filed: 2004-04-27
- Published: 2004-11-11
- Granted: 2008-08-05
- Earliest claimed: 2003-05-06
- Assignees: Canon Kabushiki Kaisha
- Inventors: Hitoshi Sato; Yasuhito Sasaki; Yoshikazu Miyajima
- Web page: https://patentgrep.com/patent/US7408276B2

## CPC

- H02K 41/03: Synchronous motors; Motors moving step by step; Reluctance motors (H02K41/035 takes precedence)
- H02K 1/32: with channels or ducts for flow of cooling medium
- H02K 5/203: {specially adapted for liquids, e.g. cooling jackets}
- 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 2201/18: Machines moving with multiple degrees of freedom
- H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53})

## Abstract

A plane motor device that includes a stator unit, a movable unit movable along a plane above the stator unit, first and second coil units at one or both of the movable unit and the stator unit, in which coil units a current flows for driving the coil unit, and an enclosure partitioned into a plurality of separate regions. The enclosure encloses the first and second coil units in two respective regions of the plurality of separate regions. Each of the two regions has a cooling channel through which cooling refrigerant flows separately from the cooling channel of the other region.

## Claims

### Claim 1

A plane motor comprising:
a stator unit; and
a movable unit movable along a surface of said stator unit,
wherein one of said movable unit and said stator unit includes a plurality of module units each having a coil unit, and a cooling channel through which cooling refrigerant flows to remove heat from said coil unit, said cooling channel being connectable to a cooling channel of the other module unit, and
wherein said one of said movable unit and said stator unit that includes said plurality of module units includes openings to said cooling channel on opposite sides of said one of said movable unit and said stator unit.

### Claim 2 (depends on 1)

A plane motor according to claim 1, wherein said stator unit includes a plurality of said module units and each module unit has a guiding surface for guiding said movable unit.