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Correction: I believe the three thyristor modules may rectifying to give the DC bus.

I am having a problem with a Baumuller BUM 63T drive (Type: BUM63TA-210/235-54-E-O-05) used to drive the refill motor on an injection moulding machine. I do not have detailed drive schematics to assist me in troubleshooting. There are three thyristor modules SEMIKRON SEMIPACK 2 SKK 162/16E which...

Correction: It is an Allen Bradley Powerflex 700 drive The motor nameplate is as follows: Reliance Electric Inverter Duty Motor Frame: 364T Hp: 60 RPM: 2475/2680 V: 460 Amps: 68.2/67.6 Hz: 83/93 The drive parameters: Rated kW: 45 Rated V: 480 Rated Amos:77 Motor Type: Induction Motor NP V: 460...

I have a 60hp AC motor controlled by a ABB Powerflex 700 Vector control drive. I notice that the no load amperage is 21A. Is this normal? ie. Is the no load amperage with drive control usually higher than using a DOL starter? If yes, why?

Thanks to all for the advice. The application is a plastic extrusion machine. The main motor is coupled to a reduction gear box (2422:43 ratio; 25kW). It is typically operated between 60-100% of the rated speed. The DC motor is blower cooled.

I have 40hp DC motor and would like to replace with an AC motor. Can I replace it with a 40hp AC motor with similar rated rpm?

I would like to use the analog output (0-10Vdc) from an AB PowerFlex variable frequency drive, which is already connected to a PLC, to syncronize two pieces of equipment. I would like the speed of the downstream equipment to be controlled by the upstream equipment. I am not sure what the...

Thanks oftenlost. Just to confrim, the model number is SCD185VA001B001, type CD329AT, Fld amps: 2.4 / 1.6.

The motor is a 75hp GE dc motor, 150/300 (field) Vdc, 500 (arm) Vdc, 1750 / 2100 rpm. It is currently running with the 300Vdc field however I would like to run at the higher rpm.

oops - thanks for the correction - i didn't re-read before i posted

I don't have the complete manual for a WER industrial Electrostat VIP DC Static Adjustable speed controller (Model ES6060). The field voltage supply is 300Vdc. Is there a jumper to get a field supply of 150Vdc??? If the field resistance is 100 ohms could I simply use a 100 ohm resistor in...

I have a d.c. motor with field coils F1, F2, F3 and F4. Normally for the lower voltage connection, I would connect in series i.e. F2 to F3 and supply on F1 and F4. For higher voltage, I would connect in parallel, F1 to F3 and F2 to F4 with supply connected. What would happen if for the higher...

I know the rated voltage is 110V. I am measuring 3590 rpm when powered (open shaft).

If I had a motor with no nameplate, how could I determine whether it were designed for 50Hz or 60Hz operation? (I don't have another motor like it to compare it to).

I have a stupid question: How do you define a "pad mount" transformer? I thought it was related to the fact that it is mounted on a pad however I am getting a sense that it relates the the connections. Please clarify.

I have some equipment running on a 460V, 60Hz power supply. Main components are a 40h.p. dc motor driven by a variable speed drive and nine other smaller motors ranging from 1.1 to 4.6 kW (460/230V, 3ph). I am considering relocating this equipment to a country with a 415V, 50Hz power supply...