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US 7,071,800 B2Granted
Actuators with integrated circuits
AssigneeAisan Kogyo Kabushiki Kaisha
InventorsShingo Nakanishi, Yoshiki Ito
Life of this patent
Estimating the term…
Abstract
An actuator includes a coil and an IC attached to a core. The coil produces a magnetic field and the core provides a path for the magnetic field. A rotor is rotatably mounted within the core, so that the rotor rotates in response to the magnetic field produced by the coil. The IC is electrically connected to the coil. The distance between the IC and the coil is determined based on a permissible temperature of the IC, so that the IC is not heated substantially in excess of the permissible temperature.
Claims17
An actuator comprising:
- a core;
- a coil attached to the core and arranged and constructed to produce a magnetic field, wherein the core provides a path of the magnetic field;
- a rotor rotatably mounted within the core, so that the rotor rotates in response to the magnetic field produced by the coil;
- and
- an IC attached to the core and electrically connected to the coil, wherein the distance between the IC and the coil is determined based on a permissible temperature of the IC, so that the IC is not heated to substantially exceed the permissible temperature;
- wherein the IC is positioned adjacent to a part of the core that is adapted to contact a heat dissipation member;
- and
- wherein the heat dissipation member is a part of an object that is driven by the actuator.
5 more elements
An actuator comprising:
- a core;
- a coil attached to the core and arranged and constructed to produce a magnetic field, wherein the core provides a path of the magnetic field;
- a rotor rotatably mounted within the core, so that the rotor rotates in response to the magnetic field produced by the coil;
- and
- an IC attached to the core and electrically connected to the coil, wherein the distance between the IC and the coil is determined based on a permissible temperature of the IC, so that the IC is not heated to substantially exceed the permissible temperature;
- wherein the IC is positioned adjacent to a part of the core that is adapted to contact a heat dissipation member;
- and
- a spacer disposed between the core and an object driven by the actuator, so that the part of the core contacts the heat dissipation member via the spacer.
5 more elements
An actuator comprising:
- a core;
- a coil attached to the core and arranged and constructed to produce a magnetic field, wherein the core provides a path of the magnetic field;
- a rotor rotatably mounted within the core, so that the rotor rotates in response to the magnetic field produced by the coil;
- an IC attached to the core and electrically connected to the coil, wherein the distance between the IC and the coil is determined based on a permissible temperature of the IC, so that the IC is not heated to substantially exceed the permissible temperature;
- wherein the IC is positioned such that a distance between a center of the IC and a part of the core that is adapted to contact a heat dissipation member is smaller than a distance between the center of the IC and a central axis of the coil;
- and
- wherein the heat dissipation member is a part of an object that is driven by the actuator.
4 more elements
An actuator comprising:
- a core;
- a coil attached to the core and arranged and constructed to produce a magnetic field, wherein the core provides a path of the magnetic field;
- a rotor rotatably mounted within the core, so that the rotor rotates in response to the magnetic field produced by the coil;
- an IC attached to the core and electrically connected to the coil, wherein the distance between the IC and the coil is determined based on a permissible temperature of the IC, so that the IC is not heated to substantially exceed the permissible temperature;
- wherein the IC is positioned such that a distance between a center of the IC and a part of the core that is adapted to contact a heat dissipation member is smaller than a distance between the center of the IC and a central axis of the coil;
- and
- a spacer disposed between the core and an object driven by the actuator, so that the part of the core contacts the heat dissipation member via the spacer.
4 more elements
Dependencies are inferred from the claim text.