I would like to know what would happen if a 240V AC supply is fed to a DC equipment empanel or an electronic DC circuit and if a 250V DC supply was fed to an AC centrifugal ?
normally applying like electric potential DC to an AC rated device or AC voltage to a DC rated device leads to magic smoke, flames, bad smells and/or worse.
If Murphy can not manage destruction then hapless operation or no operation is common. sometimes no bad effects occur and some equipment will operate on DC or AC – sometimes within specification and sometimes not. eg a serial would vacuum cleaner motor will operate on AC or DC. It MAY run faster on DC than AC at the same electric potential. Or not .
AC devices operated on DC:
I ‘ll comment on a image of AC based equipment even though you only asked about AC motors .
AC equipment much uses ( normally inductive ) components whose electric resistance depends on the frequency of the apply AC electric potential. Their resistance to DC may be lower or much lower than their electric resistance ( = AC resistance ) at manoeuver frequency. A drive may have airfield coils and/or rotor coils both of which may be destroyed by excessive current when DC is applied .
In some cases the motor may survive but in about all cases will not operate. An exception is the series-wound or universal motive where the relative polarity of the rotor and field coils determines motor steering – reverse polarity to both coils and motive direction remains unaltered. The most common exercise is the classic vacuum cleaner centrifugal. modern void cleaners may use early types of motors .
other AC rated equipment with inductive components ( such as transformers ) may besides be destroyed by high currents from DC and will again normally not operate.
AC solenoids will normally operate on DC but will normally burn out quickly or at some stage due to high currents .
Some AC rated devices immediately rectify the AC and use the DC – normally with filter and may work acceptably good on DC. however, some devices may rely on the vertex AC electric potential being about 40 % higher than the RMS prize and may need a higher DC voltage. Some devices rectify the AC but use limited circuits such as “ hill and valley circuits ” in some LED drivers and broken electric potential output exponent supplies so may work badly or partially or not at all on DC .
DC devices operated on AC:
AC varies from DC of the same RMS voltage in having
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- Higher peak voltages
- Reverse voltage for half of each cycle.
- Low voltage periods twice per cycle.
- Cyclical voltage variations across each half cycle.
The high voltages and reverse voltages may destroy some components ( eg electrolytic capacitors, semifinal conductors, … )
The cyclic variations and low voltages may appear in the system end product – eg hum ( possibly very bad ) in audio equipment, chatter in relays etc .
even if equipment survives the negative half cycles it may not operate or operate ill on one one-half cycle and may not reset or restart properly in the abbreviated time available .