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Hi guys,

I am very new to EV world. I am located in Thailand where EV is not something they are interested yet. I want to start my first EV project using rewired AC Induction Motor (Inspired from this thread http://forums.aeva.asn.au/viewtopic.php?f=41&t=3333.

After agreed on Motor, next is the Controller! I searched around the internet and it said to control the AC Motor, we need the VFD (something look like this https://th.aliexpress.com/item/3279...chweb0_0,searchweb201602_6,searchweb201603_52. But, what I mostly see in the EV forum is the Curtis Controller which I a bit confuse here.

Are these two Devices the same? What should I use?

I hope someone can enlighten me on this :D

Do really appreciate in any answer.
 

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"VFD" means Variable Frequency Drive, and so all AC motor controllers could be called VFDs... but they're not. Usually, the term VFD is used to refer to controllers which take in AC power at a fixed frequency (presumably 50 Hz in Thailand), rectify it to DC, then invert that to provide AC power of the right frequency for the motor speed. An AC controller in an EV (such as one from Curtis) starts with DC power from the battery so it doesn't have the rectifier section, just the inverter.
 
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