inverter

[LynneParticipant @lynne]

Are there digital inv. mfg. that do not have speed control etc ? I have a Raglan

which has speed control built in, but I wish to fit a 3 phase motor.

Regards Lynne

[LynneParticipant @lynne]

[Thor 🇳🇴Participant @thor]

Ehm.. Lynne, why not just use the inverter fixed at 50Hz? You don’t have to use the “speed control” of the inverter.
Thor

[john kennedy 1Participant @johnkennedy1]

How is the 'speed control built in'. If its mechanical then Thor has the answer. If its electrical then I doubt it. You can of course use a Variable Frequency Drive (inverter?) and wire the electrical speed control, For/Off/Rev and E stop as if it were the pendant control. Loads on the net about it.Do a search for 'wiring a VFD.

 

Edited By john kennedy 1 on 13/03/2014 06:21:48

[David JuppParticipant @davidjupp51506]

They do exist without speed control, but may be difficult to find. As previously mentioned, you are not forced to use the speed control – I run my drill via an inverter, frequency is set at 50Hz and the options for frequency control are not connected or configured. Speed ramps are set for start up, to limit start up current.

[Neil WyattModerator @neilwyatt]

Try Transwave at right – they sell static converters that will do the job you want without the cost or complexity of an inverter.

Neil

[LynneParticipant @lynne]

Thanks to everyone who has responded to my enquiry. The Raglan has a mechanical variable speed control.

I did appreciate that I could simply leave the inverter on a 50Hz setting, but why pay for a facilities that one is never going to use.

My understanding is that the digital inverter produces 3phase which is very close to the real thing, as opposed to the static(capacitor reliant) inverter, and I want the digital version. Regards Lynne

[Michael GilliganParticipant @michaelgilligan61133]

Posted by Lynne on 13/03/2014 22:15:47:

Thanks to everyone who has responded to my enquiry. The Raglan has a mechanical variable speed control.

I did appreciate that I could simply leave the inverter on a 50Hz setting, but why pay for a facilities that one is never going to use.

My understanding is that the digital inverter produces 3phase which is very close to the real thing, as opposed to the static(capacitor reliant) inverter, and I want the digital version. Regards Lynne

.

Lynne,

I stand to be corrected, but; I suspect that, due to the strange economics of mass-production, you may find it cheaper to buy the variable speed inverter …

MichaelG.

[Russell EberhardtParticipant @russelleberhardt48058]

Posted by Neil Wyatt on 13/03/2014 13:13:32:

Try Transwave at right – they sell static converters that will do the job you want without the cost or complexity of an inverter.

Neil

Their cheapest static converter seems to be £290 depending on the motor size you can buy several digital inverters for that price!

One advantage of keeping the mechanical speed control is that the motor cooling will work better. Running a 3 phase motor at low speed can result in overheating if you're not careful with your choices.

Russell.

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