Magnetic flux detector
AssigneeHonda Giken Kogyo Kabushiki Kaisha
InventorsShigenobu Sekiya, Yosuke Shionoya
Life of this patent
Estimating the term…
Abstract
A magnetic flux detector comprises a core member 12 and an armature member 11, and the core member 12 generates a magnetic flux by an exciting coil 13 when the exciting coil receives an excitation current controlled by an excitation current controller 30. The magnetic flux detector further comprises a search coil 14, which is provided in a magnetic path for the magnetic flux, and a magnetic flux calculator 40, which determines the magnitude of the magnetic flux by measuring an electromotive force induced in the search coil 14 by a change in the magnetic flux. The magnetic flux calculator 40 has a potential setup resistor 43, whose resistance B is sufficiently larger than the internal resistance A of the search coil 14 (approximately A=B/3˜B/30).
Claims5
A magnetic flux detector comprising:
- a magnetic flux generator, which generates a magnetic flux;
- a search coil, which is placed in a magnetic path where the magnetic flux generated by said magnetic flux generator passes, such that an electromotive force is induced in said search coil in response to a change in the magnetic flux;
- and
- a magnetic flux calculator, which determines the magnitude of the magnetic flux generated by said magnetic flux generator by measuring the electromotive force induced in said search coil;
- wherein:
- a potential setup resistor with a resistance larger than an internal resistance of said search coil is provided at an inlet of said magnetic flux calculator.
Dependencies are inferred from the claim text.