Magnetic sensor and electric current sensor including same
AssigneeMurata Manufacturing Co., Ltd.
InventorYasuhiro Shimizu
Life of this patent
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Abstract
An electric current sensor includes at least one permanent magnet and at least one magnetosensitive body that detects a to-be-measured magnetic field in a state in which a bias magnetic field is applied thereto from the permanent magnet. The permanent magnet is shaped such that the value of a permeance coefficient obtained when taking the application direction of the to-be-measured magnetic field as the magnetization direction is less than or equal to about 1.5 times the value of the permeance coefficient in a magnetization direction of the permanent magnet.
Claims19
A magnetic sensor that measures a strength of a magnetic field to be measured, the magnetic sensor comprising:
- at least one permanent magnet;
- and
- at least one magnetosensitive body that detects the magnetic field to be measured in a state in which a bias magnetic field is applied thereto from the permanent magnet;
- wherein
- the permanent magnet is shaped such that a value of a permeance coefficient obtained when taking an application direction of the magnetic field to be measured as a magnetization direction is less than or equal to about 1.5 times a value of a permeance coefficient in a magnetization direction of the permanent magnet.
Dependencies are inferred from the claim text.