Electricity: motive power systems – Positional servo systems – With particular 'error-detecting' means
Patent
1996-10-28
1999-01-05
Ro, Bentsu
Electricity: motive power systems
Positional servo systems
With particular 'error-detecting' means
318653, 318666, 318604, G05B 106, G05D 312
Patent
active
058567330
ABSTRACT:
The upper limit value and lower limit value of a control target value are alternately supplied to a single D/A converter in synchronism with a clock, an analog output from the D/A converter is compared with an output from a PBR serving as a position detector, and a motor is driven by the difference voltage, thereby positioning the control object. In this case, control of the moving direction and drive/stop of the motor is performed by a combination between the setting states of the upper and lower limit values and the polarity of the difference voltage, and the switching operation of the selector is stopped during a control operation, thereby making it possible to smoothly perform the control operation at a high speed. The control system can be digitized as a whole by detecting a position by an encoder, and integration of the system can be enhanced, thereby realizing a compact and stable control system.
REFERENCES:
patent: 3418547 (1968-12-01), Dudler
patent: 3764786 (1973-10-01), Vawter et al.
patent: 4543077 (1985-09-01), Yamamuro et al.
patent: 4549124 (1985-10-01), Beier
patent: 4712053 (1987-12-01), Numata
patent: 5389864 (1995-02-01), Tryan et al.
Iwahashi Kouji
Matsumoto Takashi
Satoh Yoshinori
Takahashi Eiji
Ureshino Hiroyuki
Calsonic Corp.
Nissan Motor Co,. Ltd.
Ro Bentsu
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