Recent content by sasice

One question, why does the device have to run whilst the men are in there?

The powder is hydrated lime. Many thanks for your help and advice.

The reason I have to try this is to extend the delivery speed range of the valve. The valve is a vane rotor that delivers a given amount of powder per revolution, at 50Hz this equates to approx 50kg/h. Although the relationship is not quite linear, I need to modulate the speed of the valve to...

Great guys, thanks. A little more info. I am driving a rotary valve through a gearbox, so the load will remain pretty much constant. The torque should decrease slightly as the speed increases, but I dont want to rely on that. Most of the motor/gearbox drives are 0.75KW so I'm looking at using a...

Thanks. I feel easier now, and can go back and insist that we get new drives (I've wanted to replace them for a while!!)

I am being asked to run some small motors (0.75 to 4 kW) at up to 100hZ. My question is what is the long term effect of this on the motor, and on the frequency invertor driving it? Many thanks