180v Induction motor ?

[gta/spec]

Hi Everyone,

Just when I thought that I had a solid understanding of induction motors....

I want to adapt an old Tsudakoma indexer and I thought that I should see what kind of motor it used. I was fully expecting an AC servo when I ran into this. The motor is made by Yaskawa and it is marked as an induction motor. The odd part to me is that its rated at 180v.

I have never seen an induction motor rated for other than standard mains voltages.

Any idea if this can be ran with a VFD?

Thanks for the input

Varispeed 3 Phase induction motor
Type UAX3EE-04DK2T
KW 0.4
V 180
Rating 40%ED
R/min 1800
A 2.1

[mike_Kilroy]

ABSOLUTELY! Just set the rated voltage at 60hz (since it is labeled 1800rpm) at 180 instead of 220 or 230.

CAUTION: THIS MOTOR WILL TAKE MORE CURRENT THAN STD VOLTAGE MOTOR! your nameplate picture is turned to far to read motor amps - this is what you need to buy your vfd rated for! it will be higher since the volts is lower. so make sure the vfd you buy is rated at or above the amps shown on your nameplate.

there may also be a max speed rating listed on the nametag that we cannot see.

160 & 180v were both common back in the day of extra wide constant HP range motor designs. with this, the motor gets 180v at 60hz "base speed" but in reality the volts can continue up to the available supply (suppose 230v here) at the higher speed of the v/hz line, or 77hz. that way the motor can go even high in speed before reaching breakdown torque. So you either set the vfd to 60hz 180v OR reset base speed to 77hz @230v and take advantage of the extra "free" hp.

[gta/spec]

Mike, Thats great information. Thanks for your input.