T
TR
Guest
A 50 KW alternator driven by an hydraulic motor in turn driven by an
hydraulic pump directly driven by a Caterpillar 3512 diesel engine on a PTO.
Caterpillar's speed is variable 650 to 1800 rpm. (used in motor vessel
propulsion).
Hydraulics electronically controlled to maintain alternator at 1500 rpm (50
hz).
Problem: The controller currently in use is more than twelve years old.
The
design of it was ahead of its time in commissioning. But is an electronic
nightmare now. Two printed circuit boards. Two
different electronic
technicians have looked at it and are unable to rectify the system. It will
not maintain 1500 rpm.
The way it is set up: Three inputs to the controller. 1) Speed sensor off
alternator shaft. 2) Hydraulic pump swash plate position feed back. [swash
plate governing the flow of oil to the motor] 3)
Desired set point for speed.
One output: Servo to position the swashplate of the hydraulic pump.
Controller powered by 24 volt DC.
My electronics knowledge is not so crash hot. But I'm sure there must be in
this day and age a simple process controller that can handle the task and is
easy to set up.
Can anyone suggest anything please? I'll furnish more info if required.
Thanks,
TR
hydraulic pump directly driven by a Caterpillar 3512 diesel engine on a PTO.
Caterpillar's speed is variable 650 to 1800 rpm. (used in motor vessel
propulsion).
Hydraulics electronically controlled to maintain alternator at 1500 rpm (50
hz).
Problem: The controller currently in use is more than twelve years old.
The
design of it was ahead of its time in commissioning. But is an electronic
nightmare now. Two printed circuit boards. Two
different electronic
technicians have looked at it and are unable to rectify the system. It will
not maintain 1500 rpm.
The way it is set up: Three inputs to the controller. 1) Speed sensor off
alternator shaft. 2) Hydraulic pump swash plate position feed back. [swash
plate governing the flow of oil to the motor] 3)
Desired set point for speed.
One output: Servo to position the swashplate of the hydraulic pump.
Controller powered by 24 volt DC.
My electronics knowledge is not so crash hot. But I'm sure there must be in
this day and age a simple process controller that can handle the task and is
easy to set up.
Can anyone suggest anything please? I'll furnish more info if required.
Thanks,
TR