Read the manual for the generator. Make the adjustments for stability and voltage roll off. If the roll off is set wrong the voltage regulator will try to maintain rated voltage as the frequency dips while starting loads. The high voltage will cause current to greatly increase as the load...
LionelHutz is bringing up the big question when he asks to rotor/impeller lift. If the water level above the pump is being alowed to fall back to the static level between starts, the motor and pump may be called upon to deliver far more that rated power for more than a few moments. What does...
How many of these grinders are involved? Maybe smaller individual drives are the best solution.
I would think again about using one drive. We use often use a single drive to power more than motor. Some drive manuals speak to this by instructing you to start the largest loads first and then...
I suggest that you not change the voltage settings. As soon as the large starting load is presented to the generator, the exciter quickly shifts to maximum current, no matter where the voltage is set. Changing the voltage or motor configuration will not make the generator produce more power...
The great value of the fluke will be to make all of the current and voltage waveforms visible. After you see those, the difficulties of accurately metering just before and just after an ASD will be clear.
Best to figure that if the drive is not smoking or on fire, almost all of the power going...
The circumstances have really not been well characterized.
Do nearby motors exhibit the same charactersitics?
The service or on-premises transformer may be delta.
If one phase is consistently .866 of the phase to phase voltage from ground and the other two are .5 of the phase voltage from...
We have a similar problem using USB port broadband cellular modems to move data from isolated sites. Some times the modems will run for a week before they go braindead, some times an hour. The only solution is to unplug and replug the USB line. Linux seems to have no facility for removing and...
A most important drive parameter for successful operation of an ASD with a generator is one to allow limiting input current of the drive to a setpoint. Set this to the current capacity of the generator, less a little. The drive will control voltage and frequency presented to the load to...
The overriding control issue here is to preserve the life of the aquifer and wells. Pumping should be done according to a plan created by a reservoir (underground) engineer or experience designer. A good plan probably includes the goal of even and consistent draw down of all wells and steady...
Thanks for the reply decasto, are you saying:
The turbine end must match the engine
The compressor end must matche the load
Examples of 15:1
500:35 HP or 20:1.3 HP
The mole weight of air is about 29, and of methane, 16. The compressor must spin 1.3 X the speed required to pressurize air to...
We hope to use an automotive style turbocharger to compress fuel gas from an approximately -6 psig source to several psig to supply the engine.
There is no need or desire to turbocharge the spark ignition engine.
We hope to avoid the expense and complexity of controls on the unit. There will...
Some hydraulic motors are available with harmonic gearing
The cheapest drive will probably be a tiny pump/motor device coupled to a 90 volt DC motor driven by a minimal DC ASD.
Will you be graded for introducing pressurized, combustible fuel to a welding location? Might investigate...
Depending on the actual power requirements and a number of other issues, if the present pump is not heavily loaded, boy is this going to get a response, you might try just adding a drive and running the pump motor in excess of 60 Hz. Due to current limiting and maximum available voltage, the...
