I have a 3.5 MW motor, syncronous, with two sleeve bearings, (zoelern manufacturer) and i have temperatures up to 93 º C, and the manufacturer of the motor, says me that i could put the alarm temperature on 95ºC and the stop on 100 º C, this seems to be too high, does somebody knows about some...
hi,
I want to start up 3- 300 kw (272 start up current cos 0,7) motor, 1- 90 kw ( 68 A start up current, cos 0,72), 1- 450 kw ( 396 A start up current cos 0,7) and the voltage is 4160 Volts... we are thinking on starting up with direct start and a generator driven by a diesel motor.
thanks...
hi, thanks for your always good ideas, now i just thinking on a new project on my table, that´s a motor that moves a propeller, that start on pitch 0, and i have calculated the mechanical losses.. and they are 116 kw´on 1600 rpm, the idea is to run the motor without load till 1600 with VFD (with...
I have a problem with a VFD and a syncronous motor permanet magnets (10 kw 100 hz 400 V), i had asked before some tips, now i could start up without flashing... with a 10khz,the motor have electrical arc between rotor and stator.... and then, i reduce to 3 khz the electrical arc dissaperar, but...
hi, all i got a question that maybe is very easy for electric guys, we have a generator, 400 V 1500 A, and we use 6 wires to get out the current, and i got diferents currents on each wire, i tight them again but it´s not sucesful, and now i don´t know why...we cheek the terminals and all seems...
I´ll like to know if it´s possible to control speed on a syncronous permanent magnets motor, with a senoidal winding (the wave must be close to a sine wave) .. in a open loop...if somebody know some manufacturer please tell me ... or if somebody have done it.....
We think on putting a more powerful pump, and we´´ll have a 700 kw motor 400 V, it´´s a pump with pitch control, and we want to start it up, and we got a power plant feeded with gen sets, and we have power enough to run the motor on full power, but in the moment of start up, maybe some circuit...
I have a asyncronous generator 500 kw and 500 rpm speed, and i´´m designing a fly wheel for it, and the short circuit torque given by the manufacturer is 96 KNm, and i think that maybe is too much... how could i know if this is true..or no so true.... does somebody could help me.... I´´m not...
we have a permanent magnets rotor, in a syncronous motor, (40 poles), the stator is three phases, and we start it with a v/hz device, in order to use a change into frequency and start it till the nominal spèed, we start with 3 hz and it start to move, but it start to do some noise and between...
We got a gas motor, Deutz motor, with spark plug in each cilinder, and we have started to control pf of the generator in the way to import reactive from the net, and we start to find more problems than usual, cause the spark plugs life get short.... in example normal life was 500 hours and now...
We have rewind a dc motor 400 KW and 1000 rpm, and after rewind the rotor we mount it on the application, after one week we find some wedges out.from the rotor... the insulation was ok, cause we have this problem in two times.... we use fiber wedges,.. could you recommend some kind of wedges or...
I have an equipment that measures the PF, it works fine on 100% , 50% load but start to work wrong on 20 % or less, and the manufacturer tells me that this is normal cause of the errors of the CT, with a accuracy class 0,5.. i´ll like to know if there´s some standard that talks about it, and...
