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Industrial electronics
board
12
hace 6 años
hace 6 años
Good morning people, I want to know if someone made or arranged these types of boards that are to command DC motors. My drawback is knowing what capacitors with potentiometers are used at the exit of the traffic. Could it become a voltage booster? The machine is a crankshaft grinding machine, it has a 5.5cv motor for the stone and 2 DC motors. In the first image I show the plate that produces the variation of speed in DC motors. in the second one the board that I have to update. and what I don't understand is what the capacitors are for.
1.968
hace 6 años
Hello, DC motors work with DC, in those electrical panels elements were installed to power these motors such as, a rectifier, a capacitor and potentiometers to regulate the speed, you must have 2 wires for 90vcc motor field coil. and regulated voltage of up to 190vcc. for example. For the armature, look at the motor and you will see how it has 4 wires.
9.229
hace 6 años
In my case
I only change contactors by telemecanique and change cables
These boards filter harmonics and limit inductive currents, a bad calculation makes equipment useless and if you do not know or do not have diagrams and spare parts at hand you will regret the update you made
Before everything. De-energize equipment. Take high-resolution digital photos. Then blow out equipment with pressurized air. Wash with solvent NF. Take digital photos again
Start to make wiring diagram and mark control and force lines
Luck
9.229
hace 6 años
Perform test to see if solvent does not affect white timer. If it affects it, cover it or protect it
1.968
hace 6 años
hace 6 años
Hello, in the photo you send you can see, on the left side three electronic cards, one marked with a red circle, well because all three are speed regulators of DC motors. The potentiometers (presettable) that have the cards on the right, are only for the adjustment of the card, once adjusted at the factory should not be manipulated, it would be a serious fault, we do not know the data of the builder to touch the corresponding to off- set, limit current, v.max, v.min. Acceleration, door moment, gain. The black cards on the right, next to the transformer are electrolytic filter capacitors, what I don't see well is what is under the capacitors, if they are threaded they are power diodes,
1.968
hace 6 años
Refrimat, I told you that from these capacitors possibly the Excc coils are fed. the motor. From the terminal of these capacitors to which motor they go, what voltage does the 90vdc motor plate say. for example. because these potentiometers serve to regulate the voltage of these coils of Excc., they do not regulate speed, they regulate the current. The speed in these dc motors. It is regulated by the voltage applied to the armature. Look at the terminals of the motor if those of the armature have the reference J and K, this reference tells you if it is excc. independent or in suhnt.
comment.
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