Title:
MAGNETIC ENCODER, ABSOLUTE ELECTRICAL ANGLE MEASUREMENT METHOD AND SYSTEM, AND READABLE STORAGE MEDIUM
Document Type and Number:
WIPO Patent Application WO/2021/128419
Kind Code:
A1
Abstract:
A magnetic encoder, an absolute electrical angle measurement method and system, and a readable storage medium. The magnetic encoder (1) is configured to detect a two-dimensional magnetic-field component of a magnetic field generated by magnetic steel (4) to be tested, the two-dimensional magnetic-field component comprising a first direction magnetic component and a second direction magnetic component, wherein the magnetic encoder (1) comprises a magnetoresistive sensor (2), magnetic field auxiliary coils (31, 32; 33, 34; 35), and a coil current control circuit electrically connected to the magnetic field auxiliary coils (31, 32; 33, 34; 35); the magnetoresistive sensor (2) is a planar component; the coil current control circuit is configured to supply a current to the magnetic field auxiliary coils (31, 32; 33, 34; 35), so that the magnetic field auxiliary coils (31, 32; 33, 34; 35) generate auxiliary magnetic fields affecting the first direction magnetic component and the second direction magnetic component; the auxiliary magnetic fields affect the two-dimensional magnetic-field component to form a common magnetic field; the magnetoresistive sensor (2) is configured to detect the two-dimensional magnetic-field components of the common magnetic field and the magnetic field of the magnetic steel (4) to be tested.
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Inventors:
BI CHAO (CN)
LONG CAI (CN)
BI LEI (CN)
LONG CAI (CN)
BI LEI (CN)
Application Number:
PCT/CN2019/130648
Publication Date:
July 01, 2021
Filing Date:
December 31, 2019
Export Citation:
Assignee:
FORTIOR TECH SHENZHEN CO LTD (CN)
International Classes:
H02K11/215; G01D5/244
Foreign References:
| US6486663B1 | 2002-11-26 | |||
| JP2005201657A | 2005-07-28 | |||
| JP2005300216A | 2005-10-27 | |||
| CN102680916A | 2012-09-19 | |||
| CN104655004A | 2015-05-27 |
Attorney, Agent or Firm:
CENFO INTELLECTUAL PROPERTY AGENCY (CN)
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