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| Electricity getting very expensive in the Workshop |
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| awemawson:
The motor is a DC Mawdsley one . It has a 1.5 HP cooling fan blowing into it all the time. Current consumption of other devices seems sensible - certainly not out by a factor of ten |
| vtsteam:
26.97 KW = 36 Hp. :jaw: It can't really take that much to spin a ground shaft in precision bearings. |
| awemawson:
OK it's spinning the gear train as well but I agree to being surprised. Does a DC motor actually vary it's consumption much? With AC drive you have the motor reactance which goes down on load hence drawing more amps - what is the case in a DC drive? |
| vtsteam:
Maybe Ebay purchases didn't pan out this time? Not that I don't make them myself...... |
| awemawson:
--- Quote from: vtsteam on May 13, 2022, 11:41:15 AM ---26.97 KW = 36 Hp. :jaw: It can't really take that much to spin a ground shaft in precision bearings. --- End quote --- It's rated at 26.5 HP 400 volts and 34 to 75 amps DC depending on speed with 170 volts on the field coils whose current is separately controlled - plate below |
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