Electricity: motive power systems – Positional servo systems – Digital or numerical systems
Patent
1996-11-08
2000-02-01
Martin, David
Electricity: motive power systems
Positional servo systems
Digital or numerical systems
318626, 318282, 318286, 318468, G05B 1929
Patent
active
060207086
ABSTRACT:
A stop range setting circuit sets a range of permissible positions around where the control object is desired to be stopped on the basis of a target position signal, and a potentio balance resistor (PBR) detects a present position of the control object driven by a motor. The comparison circuit compares the present position of the control object with the set range, and outputs an out-of-stop range signal and a rotating direction indication signal until the control object reaches the range. The out-of-stop range signal is input to a drive start determination circuit, and a drive permission signal is output to a drive circuit when the out-of-stop range signal is continuously output for at least a predetermined period of time. The drive circuit drives the motor in a direction indicated by the rotating direction indication signal while the drive permission signal is continuously output, so that an instantaneous ON/OFF signal is not input to the drive circuit in the presence of external noise.
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Patent Abstracts of Japan, vol. 009, No. 182 (P-376), Jul. 27, 1985 & JP 60 054022 A, Mar. 28, 1985.
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Matsumoto Takashi
Satoh Yoshinori
Ureshino Hiroyuki
Martin David
Nissan Motor Co,. Ltd.
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