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US 2004/0164827 A1Published application
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.
Claims22
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.
2 more elements
An actuator comprising:
- a connector arranged and constructed to be connected to a power source and to receive a control signal;
- a coil arranged and constructed to produce a magnetic field when exited;
- an IC arranged and constructed to supply an excitation current to the coil based on the control signal, wherein the excitation current is greater than a current of the control signal;
- a core arranged and constructed to provide a path of the magnetic field of the coil;
- a rotor disposed within a part of the core;
- wherein:
- the coil is disposed on one side of the core;
- and
- the IC is attached to the core on the side opposite to the coil.
6 more elements
An actuator comprising:
- a connector arranged and constructed to be connected to a power source and to receive a control signal;
- a coil arranged and constructed to produce a magnetic field when exited;
- an IC arranged and constructed to supply an excitation current to the coil based on the control signal, wherein the excitation current is greater than a current of the control signal;
- a core arranged and constructed to provide a path of the magnetic field of the coil;
- a rotor disposed within a part of the core;
- wherein:
- the coil is disposed on one side of the core;
- and
- the IC is positioned adjacent to a part of the core that is adapted to contact a heat dissipation member.
6 more elements
An actuator comprising:
- a connector arranged and constructed to be connected to a power source and to receive a control signal;
- a coil arranged and constructed to produce a magnetic field when exited;
- an IC arranged and constructed to supply an excitation current to the coil based on the control signal, wherein the excitation current is greater than a current of the control signal;
- a core arranged and constructed to provide a path of the magnetic field of the coil;
- a rotor disposed within a part of the core;
- wherein:
- the coil is disposed on one side of the core;
- and
- 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.
6 more elements
Dependencies are inferred from the claim text.