Magnetic resolver
AssigneesToyota Jidosha Kabushiki Kaisha, Matsuo Industries, Inc.
InventorsMasayuki Nishiguchi, Yuji Sekitomi, Yoji Hamamoto
Life of this patent
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Abstract
A magnetic resolver includes: a plurality of columnar cores disposed on an annular plate; a coil portion disposed around each of the columnar cores; and an annular rotor having a sinusoidal profile that rotates in a plane parallel to the top faces of the columnar cores around a rotation axis that passes through the center of the annular plate. The coil portion may be formed of a patterned coil formed on an annular substrate that has a plurality of through holes made therein through which the plurality of cores are passed, the patterned coil being formed around the through hole.
Claims17
A magnetic resolver comprising:
- a stator portion which includes an annular plate having, on a side thereof, a plurality of columnar cores;
- a coil portion disposed around each of the columnar cores;
- and
- an annular rotor which has an outer periphery having a sinusoidal profile line that rotates in a plane that is parallel to top faces of the columnar cores around a rotation axis that passes through the center of the annular plate, wherein a radius of the rotor varies according to a sine function, an amplitude of the sine function being substantially equal to a radius of the columnar cores,
- wherein the columnar cores are radially disposed between a maximum radius and a minimum radius of the rotor,
- wherein an area by which a top face of the columnar core and the annular rotor overlap when viewed from above, varies as a rotation angle of the annular rotor relative to the stator portion varies, and
- wherein when one of the columnar cores is disposed between two crests of the profile line of the rotor when viewed from above, a gap is formed between the one of the columnar cores and a trough of the profile line.
Dependencies are inferred from the claim text.