Electricity: motive power systems – Positional servo systems – Program- or pattern-controlled systems
Patent
1989-04-06
1990-05-08
Shoop, Jr., William M.
Electricity: motive power systems
Positional servo systems
Program- or pattern-controlled systems
324166, 32420715, 324173, G05B 1910
Patent
active
049241613
ABSTRACT:
A position and speed detecting device is provided. This device includes a detection-signal generator comprising a rotor magnet assembly having a plurality of magnetic poles and a coil pattern for signal detection which moves relatively facing magnetized bodies of the rotor magnet assembly, a speed-signal detector for taking out a signal for frequency detection from said coil pattern for frequency-signal detection to produce a signal for speed detection; and a position-signal detector for producing a signal for position detection from said coil pattern for position-signal detection. An interface of at least one pair of S and N magnetic poles slanted at an angle different from that of interfaces of other magnetic poles and a part of coil pattern in the coil pattern for signal detection is slanted at an angle substantially the same as that of the magnetic poles for position-signal detection and other part of coil pattern is formed at an angle substantially the same as that of the magnetic poles for frequency-signal detection to make it a coil pattern for frequency-signal detection.
REFERENCES:
patent: 4410853 (1983-10-01), Ikoma
patent: 4529934 (1985-07-01), Heinrich
patent: 4695795 (1987-09-01), Nakamizo
patent: 4746862 (1988-05-01), Ueki
patent: 4818939 (1989-04-01), Takahashi et al.
Fujimoto Toru
Ueki Yasuhiro
Bergmann Saul M.
Shoop Jr. William M.
Victor Company of Japan Ltd.
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