Aug 23, 2016 14:00
7 yrs ago
6 viewers *
Polish term
Poland
prąd obciążenia
Polish to English
Tech/Engineering
Energy / Power Generation
"W maszynach prądu stałego wyróżnia się następujące wielkości: prąd twornika (armature current) Ia, prąd wzbudzenia If, prąd obciążenia I. Prąd obciążenia może być pobierany z sieci lub do niej oddawany. Napięcie twornika U, rezystancja obwodu twornika Ra, rezystancja obwodu wzbudzenia Rf, prędkość wirowania wirnika n, moment elektrodynamiczny M, siła elektromotoryczna indukowana w tworniku E."
Proposed translations
(English)
| 4 | load current |
Andrzej Mierzejewski
|
| 3 | reactive load current |
Frank Szmulowicz, Ph. D.
|
Proposed translations
1 day 17 hrs
Andrzej Mierzejewski
Poland
Poland
Native in Polish
Works in field
Poland
M.Sc. Engineer (Mechanics)
Native in: Polish
Works in: Polish to English, English to Polish, German to Polish, and 3 more.
Related KudoZ points
:
56
Selected
load current
Po prostu w istniejącym ogólnym kontekście.
Odpowiedź MacroJanusa dotyczy tylko jednego składnika prądu obciążenia, na dodatek w obwodzie prądu przemiennego, a nie stałego, patrz http://www.allaboutcircuits.com/textbook/alternating-current...
Odpowiedź MacroJanusa dotyczy tylko jednego składnika prądu obciążenia, na dodatek w obwodzie prądu przemiennego, a nie stałego, patrz http://www.allaboutcircuits.com/textbook/alternating-current...
4 KudoZ points awarded for this answer.
Comment: "Dziękuję."
11 hrs
Frank Szmulowicz, Ph. D.
United States
United States
Native in Polish
&
English
United States
On time, on target, on budget.
Native in: English 
, Polish
Works in: Polish to English, English to Polish, Russian to Polish, and 1 more.
Related KudoZ points
:
433
reactive load current
I added reactive to distinguish the resistive load current (for which the power factor is always positive = power flows to the load) from the reactive load current (which has capacitive and inductive components), in which the power factor can be negative, so that power flows back to the circuit.
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Electrical circuits containing dominantly resistive loads (incandescent lamps, heating elements) have a power factor of almost 1.0, but circuits containing inductive or capacitive loads (electric motors, solenoid valves, transformers, fluorescent lamp ballasts, and others) can have a power factor well below 1.
If a purely resistive load is connected to a power supply, current and voltage will change polarity in step, the power factor will be unity (1), and the electrical energy flows in a single direction across the network in each cycle. Inductive loads such as transformers and motors (any type of wound coil) consume reactive power with current waveform lagging the voltage. Capacitive loads such as capacitor banks or buried cable generate reactive power with current phase leading the voltage. Both types of loads will absorb energy during part of the AC cycle, which is stored in the device's magnetic or electric field, only to return this energy back to the source during the rest of the cycle.
https://upload.wikimedia.org/wikipedia/commons/thumb/b/b9/Po...
https://en.wikipedia.org/wiki/Power_factor
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Electrical circuits containing dominantly resistive loads (incandescent lamps, heating elements) have a power factor of almost 1.0, but circuits containing inductive or capacitive loads (electric motors, solenoid valves, transformers, fluorescent lamp ballasts, and others) can have a power factor well below 1.
If a purely resistive load is connected to a power supply, current and voltage will change polarity in step, the power factor will be unity (1), and the electrical energy flows in a single direction across the network in each cycle. Inductive loads such as transformers and motors (any type of wound coil) consume reactive power with current waveform lagging the voltage. Capacitive loads such as capacitor banks or buried cable generate reactive power with current phase leading the voltage. Both types of loads will absorb energy during part of the AC cycle, which is stored in the device's magnetic or electric field, only to return this energy back to the source during the rest of the cycle.
https://upload.wikimedia.org/wikipedia/commons/thumb/b/b9/Po...
https://en.wikipedia.org/wiki/Power_factor
Peer comment(s):
| neutral |
Andrzej Mierzejewski
: Pytanie dotyczy maszyn prądu stałego. AFAIK twoja odpowiedź może dotyczyć tylko prądu przemiennego (AC), nie stałego (DC). Zerknij do swojego pierwszego linku.
6 hrs
|
Discussion
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1) Every motor is an inductive load!
2)YES it is ABSOLUTELY an inductive load. It is operated at DC, but the inductive component looks like a short at DC. Try and switch it off real quick and you'll see how inductive it really is.
3) If a brushed motor was a resistive load, then it would fry whenever you hooked up a power supply across it because the winding resistance is so low. BUt it doesn't. A DC brushed motor accepts DC current, but inside the rotating brushes are commutating (switching the DC current back and forth across the windings) so that if you measured the voltage across the individual windings you would not see a flat constant DC voltage, but you would see a AC waveform (not necessarily the pure sinusoid AC waveform you get from the mains, more likely to be a trapzoidal waveform but AC nonetheless with no AC component).
http://www.electro-tech-online.com/threads/is-a-dc-motor-an-...
;-)
Czy prąd obciążenia to to samo co prąd obciążeniowy? To wtedy dałbym "load current"