DC Motor as generator
DC Motor as generator
(OP)
I own a scale model jet turbine engine. To start this engine up I have to use a hair dryer to spin the engine up to 3000rpm's, then I can ignite the gas. I have seen small DC motors used for this step, connected directly to the shaft. I have heard that the motor can also act as a generator when the engine is at running speeds, from 35,000 to 90,000 rpm's. Is this true and if so what size motor would handle these speeds?





RE: DC Motor as generator
I know of no DC motor that will tolerate these speeds. There may be some but I certainly have not seen one.
And, yes, as long as a DC motor is driven at safe speeds and has its field energized (it might be permanent magnet), the motor is essentially a generator and can be used as one.
RE: DC Motor as generator
RE: DC Motor as generator
RE: DC Motor as generator
RE: DC Motor as generator
www.micromo.com
RE: DC Motor as generator
You may need to run this like a turbo prop to regulate the speed down.
Sounds like fun with the potential for profit.
Barry1961
RE: DC Motor as generator
RE: DC Motor as generator
Have fun!!
Barry1961
RE: DC Motor as generator
RE: DC Motor as generator
RE: DC Motor as generator
RE: DC Motor as generator
RE: DC Motor as generator
RE: DC Motor as generator
RE: DC Motor as generator
Check out www.artesjet.com or www.behotec.com they make great engines. Can also just do a search for model jet engines and find many sites. Also the Gas Turbine Builders Association is a great site with several pictures www.gtba.co.uk