US 12,191,872 B2
R/D conversion method and R/D converter
Hiroshi Kushihara, Nagano-ken (JP); Hirofumi Maruyama, Nagano-ken (JP); Ryohei Ushikusa, Nagano-ken (JP); and Shinichi Arai, Nagano-ken (JP)
Assigned to TAMAGAWA SEIKI CO., LTD., Nagano-Ken (JP)
Appl. No. 17/760,546
Filed by TAMAGAWA SEIKI CO., LTD., Nagano-ken (JP)
PCT Filed Sep. 10, 2020, PCT No. PCT/JP2020/034245
§ 371(c)(1), (2) Date Mar. 15, 2022,
PCT Pub. No. WO2021/124624, PCT Pub. Date Jun. 24, 2021.
Claims priority of application No. 2019-228803 (JP), filed on Dec. 19, 2019.
Prior Publication US 2022/0329249 A1, Oct. 13, 2022
Int. Cl. H03M 1/06 (2006.01); G01B 7/30 (2006.01); G01D 5/244 (2006.01)
CPC H03M 1/0602 (2013.01) [G01B 7/30 (2013.01); G01D 5/24476 (2013.01); H03M 1/0626 (2013.01)] 8 Claims
OG exemplary drawing
 
1. An resolver digital conversion method of converting resolver signals of a resolver of any one of a two-phase excitation/two-phase output type, a one-phase excitation/two-phase output type, or a two-phase excitation/one-phase output type into a digital angle value,
the R/D conversion method comprising a step of removing a frequency band including a frequency component that is twice an excitation frequency of excitation signals of the resolver from the digital angle value.