Invertor required

[scooterist007]

You say that the motor can be wired up in star and delta but you only list 415v, this will be a dual voltage motor, what is the voltage? If it isn't 220v three phase then you won't be able to use a vfd. Can you take a photo of the motor data plate?

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[magicniner]

If it isn't 220v three phase then you won't be able to use a vfd.

Variable Frequency Drives are available in a wide variety of input/output voltage configurations so your statement is, strictly speaking, incorrect.
You can buy a VFD with 240v single phase input which generates 380/415 3 phase output, they are more expensive than the kind you are assuming were the only type available so if you'd said "then you won't be able to use a cheap vfd" then you'd have been on the money :D

- Nick

[m_c]

You say that the motor can be wired up in star and delta but you only list 415v, this will be a dual voltage motor

Dual speed motors were fairly common in old machinery, and were fixed voltage - https://en.m.wikipedia.org/wiki/Dahl...changing_motor

With a VFD you would have to be careful you didn't change speed with the motor running, as it's likely to make even the best of VFDs fail (either fault out, or more likely just go pop!) with the current/phase synchronising involved when changing speeds.

[sheffstaff]

Hi all the Dual speed motor is as previously said a 2.4Kw motor so would require at least a 3HP invertor but this would only power light use. So i would require in my opinion a 5HP invertor and the invertor would have to be a dual stage invertor which as some of you have already said are not the normal invertors that would power a dual voltage motor.

Dual speed motors require different invertors this is why i have asked if anyone on here knows or has something to offer me.
This is the motors plate: Type YD112M-8/4 –TH


INS.CL= B
Connection Δ/2Y
1.5 / 2.4 Kw
4.6- 4.9 A Rating: S1
50 Hz
Rpm 700/1410
415 V
IP 44/46
Capacity 2KVA

A 240V to 415V Digital phase invertor is the way forward so i ask that if anyone has a second hand unit that is working i would appreciate the help.

[vidya31]

You can see it online.