I have several small single phase motors on pumps which start on average 100-120 times an hour over 2 shifts per day. These are controlled by a float which rises as milk fills a receiver. There is a solid state control which triggers a magnetic contactor starting these 1 hp motors across the...
Anyone ever seen the inside of the large single phase "written pole" motors being sold by precise power for 30-75 hp loads?
http://www.precisepwr.com/Products.asp?bhcp=1
It's an interesting idea and I wonder how the expense of one of these patented motors and it's control would compare to an...
I think someone posted a standard for color to number conversions of motor leads a while back. Cannot find anything online this morning or by searching here. Anyone know where it is?
I have had a 3hp 3 phase motor running seasonally, intermittent (half hour runs separated by hours) for several years now driving a centrifugal pump. It is powered by a Phase o Matic or some such brand static "phase converter" which is essentially a start relay used to apply voltage (phase...
I am trying to understand the failure of a standard 3 phase squirrel cage induction motor. This one is a Baldor
7.5 hp
1750 rpm
TEFC
213T frame
208/230-460 9 lead, connected low voltage per the motor diagram (2 parallel wye) Connections appeared to be secure, requiring the wire nuts and...
I have a procedure to use low voltage DC power source like a battery and a volt meter to ID the leads on a 3phase motor. For example, find all the pairs, flash a pair called 1 and 4 and measure the voltage induced in each of the other pairs with a voltmeter. by the readings identify the other...
I am looking at installing a VSD on a single motor 15hp 1800rpm service is open y to 120/240V 3 phase open delta. motor will be driving a positive displacement lobe blower in vacuum service and controlled by analog 4-20ma signal. Leads are short less than 20 feet. I think this will be a...
I saw the post about using a VFD on a WRIMotor with the rotor shorted. I wondered if one could short the armature windings (or connect a resister in the circuit)of an AC alternator and use it as an induction generator. Might be easier to switch back and forth with a brush/slip ring design...
