Control apparatus for electromagnetic device having proportional solenoid
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United States of America Patent
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-
Mar 2, 1993
Grant Date -
N/A
app pub date -
Sep 28, 1990
filing date -
Jan 30, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A control apparatus for an electromagnetic device having a proportional solenoid has a duty factor calculation circuit for calculating a duty factor on the basis of a control target value, a pulse signal formation circuit for forming a pulse signal based on the calculated duty factor, an exciting current formation circuit for forming an exciting current for electrically stimulating the coil of an electromagnetic apparatus in response to the formed pulse signal, and an integration circuit for integrating the exciting current of the coil in synchronization with the pulse signal. This control apparatus calculates the duty factor using the duty factor calculation circuit from a control target value and the integration value output from the integration circuit.
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