| T O P I C R E V I E W |
| Zlatkodo |
Posted - Jan 23 2010 : 08:15:38 AM
I want to make a converter 230 V , 50 Hz to 276 V, 60 Hz for single-phase motor of 370 W.
I will use motor designed for the 230 V, 50 Hz, 3000 rpm to get a speed of 3600rpm.
Anyone has some simple but reliable scheme for it?
Thanks in advance.
Zlatkodo, opetja@ymail.com
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| 5 L A T E S T R E P L I E S (Newest First) |
| wasssup1990 |
Posted - Feb 10 2010 : 12:55:53 AM
Yes it is very possible but a piece of of equipment like that is very specialised for the task and will probably only ever be made when the idea is put forward to a contract engineer.
I wouldn't think it is too complex to make yourself. You seem to know how it could be done.
-Step up from 230VAC RMS @ 50Hz to 390VDC (276VDC RMS when under load)
-Use a H-bridge to switch the 276VDC RMS across your load at 60Hz. |
| Zlatkodo |
Posted - Feb 10 2010 : 12:38:23 AM
With the induction motor I can not otherwise get the 3600 rpm at 50 Hz frequency. I am not an expert in electronics (my area is induction motor design), but I know that there are relatively simple converters: 12 VDC to 230 VAC.
Can I make in a similar way, the converter like:
- input 230 V 50 Hz
- bridge rectifier provides approximately 230 V DC
- with a few components (HV - transistors, capacitors, resistors ...) and the output transformer to get 276 V AC, 60 Hz?
Thanks.
Zlatkodo |
| wasssup1990 |
Posted - Jan 30 2010 : 9:42:32 PM
Of course but the person made it clear what they wanted so they'll be able to decide what's best because it's thier money. |
| Aaron Cake |
Posted - Jan 30 2010 : 10:54:50 AM
In many cases it is simply much cheaper/easier to swap in a motor designed for the supply voltage you have instead of trying to create that voltage. |
| wasssup1990 |
Posted - Jan 23 2010 : 09:09:54 AM
Huh. I've never seen a simple circuit which will do this. So you want to boost the voltage and the frequency? Well things would be easier if the source was 60Hz like your load, in that case you could just use a step-up transformer. I haven't really thought of this scenario. I think you would need a special type of voltage and frequency converter. Well that's all solid state.
You could do it with mechanics I suppose. Have a motor connected to your source 230V 50Hz and shaft its energy to a generator that produces 60Hz at 276V. I wouldn't put my bets on finding a generator that would give you sustained voltage and frequency under load.
If you want something more stable go for an AC voltage & frequency converter. The schematics you're looking for a probably rare for the power levels you require. It'll be more worth your time and money just buying a professionally built one. |
