Title:
DIGITAL ANGLE DETECTING METHOD
Document Type and Number:
Japanese Patent JP3624458
Kind Code:
B2
Abstract:
PURPOSE: To obtain a digital angle output which has small influence of cable length, temperature variation, etc., by using a phase signal consisting of a composite resolver signal composed of a sin-side 1st resolver signal and a phase- shifted resolver signal generated by shifting the phase of a cos-side 2nd resolver signal by 90°
CONSTITUTION: A waveform shaper 23 shapes the waveform of a phase signal sinθ.sin(ωt-90°-θ) as the composite resolver signal obtained by putting the 1st resolver signal sinθ.sinωt of a resolver 2 and the phase-shifted resolver signal cosθ.sin(ωt-90°), obtained by shifting the phase of the 2nd resolver signal cosθ.sinωt by 90° through a phase shifting circuit 31, together through an adder subtracter 22, and inputs the waveform-shaped signal as sampling pulses to a latch circuit 24. Then the phase count signal 21a outputted from a phase counter 21 is latched by a latch circuit 24 with the inputted sampling pulses and outputted as a digital angle output &phiv through an output buffer circuit 40. Therefore, the stable digital angle output is obtained.
Inventors:
Hiroshi Kushiwara
Application Number:
JP8424095A
Publication Date:
March 02, 2005
Filing Date:
April 10, 1995
Export Citation:
Assignee:
Tamagawa Seiki Co., Ltd.
International Classes:
G01B7/00; G01B7/30; G01D5/245; G06G7/22; H03M1/64; (IPC1-7): G01D5/245
Domestic Patent References:
| JP2148416U | ||||
| JP62211512A | ||||
| JP59148812A |
Attorney, Agent or Firm:
Michiteru Soga
Yoshio Kobayashi
Yutaka Ikeya
Hidetoshi Furukawa
Suzuki Kenchi
Masahisa Hase
Tetsuo Kuroiwa
Yoshio Kobayashi
Yutaka Ikeya
Hidetoshi Furukawa
Suzuki Kenchi
Masahisa Hase
Tetsuo Kuroiwa