Hi,
I'm not an expert on motors but I would guess that a DC motor would do the trick. 4000 rpm seems a bit high for common dc motors. I haven't heard of a brushless DC motor. You could use a simple bench adjustable DC power supply or a SCR speed controller. Be sure that the DC supply has...
It seems to me that the diode is certainly capable of passing the surge current since the solenoid current is only 0.28 Amps. Therefore it seems more likely the problem is an over voltage condition. Perhaps the recovery time of the diode is an issue. Maybe a faster diode would work better...
Sometimes when the motor goes backwards, it changes direction without interrupting the power to go in the correct direction. Note that when it is going the wrong way, it turns at a slower speed than normal, perhaps 1/4 to 1/2 the normal speed. It is also noisier. This causes a problem with...
The motor is about 2" diameter and 2" deep. It is 500 rpm 50 Hz. We are testing it on 60 Hz. It has three wires coming out of it. One wire is the common or neutral connection. One of the wires, when energized makes the motor turn in one direction. The other wire makes it turn the...
The motor is small and draws 10.5 VA according to the name plate on the actuator. The actuator is installed on a valve. The power for the motor was supplied via an up down switch. Therefore, the wrong direction could not be caused by the controls. We can not change the motor but the...
We have a linear actuator which operates with a 220 vac bidirectional motor. When one coil is energized the motor turns one way. When the other coil is energized the motor turns the other way. However, sometimes the motor spins slower in the wrong direction. Any ideas on how to prevent this...
A delta connected secondary of a transformer does not have a neutral connection. Therefore there is no mathmatical relationship. Each of the phases is floating with respect to the neutral. If it where a Y connected, then the phase to neutral voltage would be Voltage Line to line / Square root(2.
At 8000 feet the air pressure is about 74% of sea level pressure (see:http://www.cleandryair.com/AltitudePressure.htm). Therefore the cooling is likely to be about 26% less than at sea level. If you are only running at 55% load then it may not be necessary to add additional cooling fans but it...
You could use an adjustable voltage regulator such as the LM317 to make an adjustable constant current source. Here is a link to a schematic: http://www.uoguelph.ca/~antoon/gadgets/sccs.htm
However this aproach requires a variable resistor to change the current level.
You may be able to...
I'm looking for some circuit ideas to implement a voltage controlled one shot timer that would be triggered periodically. The input would be a voltage from 1-5 Vdc and a trigger to start the timer. The output would be a single pulse with a duration linearly dependent on the input voltage...
