Hello guys,
Is anybody saw this kind of armature temperature measurement on DC motor (see attached photo).
We should upgrade drive for this motor with new one, and hopefully we should keep temperature measurement.
Anybody has idea what this resistance frequency converter is doing here ...
Hello all,
In attach you can find standard (recomended) circuit diagram of DC drive with dynamic braking.
Drive is ABB DCS800, 4Q, 3300A, 690VAC
Motor is 700 VDC, 2300A, 225 rpm, separate excitation.
Dynamic breaking will be used in case of drive or network failure so question is:
I DONT...
Hi All,
I am interesting does someone have some nice and simple literature about resonant freguency eliminator.
Usualy in drives manuals there are nothing special about this. There are no further information about tuning of this filter.
Does anyone have some positive experience about using...
Hi to you all.
I am interesting does anyone have expirience in commissioning big induction motors supplied via VSD that workink in scalar control mode (V/f).
I had commissioning 2.85 MW motor, 660 V, 50 Hz. Drive is ABB ACS800.
Uncoupled motor was worked very bad in scalar with some high...
Hi guys,
I am involved in one project where customer ask from us to install new abb igbt rectifier (ISU) on old abb Sami Star inverters. It is multidrive configuration with four Sami Star inverters.
I never worked with such old drives like Sami Star and it is very hard to find some...
Hi guys,
I am interesting what is your opinion which is the optimal method for controling motors on belt conveyor in open pit minning.
Motors are supplied via VFD with possibility of speed or torque control (ABB ACS800). Belt distance between 2 driven drums are something about 20-30m. Belt is...
Hi guys,
While I was reading some other post one thing come on my mind.
There is induction motor connected for star delta start with classic scheme (three contactors: main, star and delta).
Firstly main contactor and star contactor close their contacts. Motor is accelerating and after some...
Hello everybody,
I have a one question for you. If I use two AC induction motors mechanically coupled with 2 ABB drives ACS800 (direct torque control) and if they are working in master follower configuration is it better to put encoder on follower or there is no sense to do this.
Thanks.
In one excavator there is 6 kV synchronous motor starting direct on line. Motor is starting with small load but with high inertia. Motor is running 3 1MW DC generators (Vard - Leonhard group). Starting time is almost 1 minute. Because of direct on line start starting current is too high and...
