Control device for power trim unit for outboard engine
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United States of America Patent
Stats
-
Dec 9, 2008
Grant Date -
Oct 23, 2008
app pub date -
Apr 22, 2008
filing date -
Apr 23, 2007
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A control device for a power trim unit for an outboard engine includes: a circuit that supplies a driving current to a power trim motor of the outboard engine from a DC power supply through an overcurrent protection switch and an H bridge circuit comprised of semiconductor switches; a trim angle control portion that performs control to cause a trim angle to reach a target value by performing PWM control of the driving current supplied from the DC power supply through the H bridge circuit to the power trim motor according to a deviation between the target value of the trim angle of the outboard engine and a trim angle detected by a trim angle sensor; and an overcurrent protection portion that turns off the overcurrent protection switch when overcurrent flows through the H bridge circuit.
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