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AssigneeDelta Electronics, Inc.
InventorsChin-Shiong Tsai, Cheng-Ping Lin, Meng-Chang Lin, Mi-Tine Tsai, Po-Ming Chen
Estimating the term…
An angle-calculation apparatus for three-phase optical encoder receives three-phase sinusoidal signals 120 degree phase from the optical encoder and obtains angle information for a motor rotor. The angle-calculation apparatus includes an A/D converter, a digital signal processor (DSP), a phase digitalizer and a digital counter. The A/D converter converts three-phase analog signals of the optical encoder into three-phase digital signals. The phase digitalizer converts the three-phase analog signals into digital phase signals. The digital counter generates a counting value based on the digital phase signals. The DSP performs an inverse trigonometric function calculation on a relatively linear region of the three-phase digital signals to obtain the angle information. The DSP obtains the rotation turn number and rotation direction of the motor rotor according to the counting value.
An angle-calculation apparatus for a three-phase optical encoder, the three-phase optical encoder generating three-phase analog sinusoidal signal with 120 degree phase difference according to a rotation of a motor rotor, the angle-calculation apparatus comprising:
A method for calculating a rotation angle for a motor rotor based on three-phase analog signals from a three-phase optical encoder, comprising:
An angle-calculation system for a motor rotor, comprising:
Dependencies are inferred from the claim text.