Electric Greyhound Conversion Motor

by Ross Wilson
(Prince Rupert, BC Canada)

I have an opportunity to buy a used electric motor from a mining operation. it is a 300-hp 460-V RMP-1800 phase 3.

From this info, can I use this on a greyhound bus? I have an opportunity to purchase 2 with the same capacity.

Hi, Ross -
What a great idea, converting a vintage greyhound bus to electric! The company in the video above is also doing this. You can get the old buses for cheap, he says, and convert them for a quarter of the price of a new electric bus.

I don't know about your motor, though. Sounds like a monster!

The bus in the video is using a 170 hp motor with 1200 ft-lbs of torque.

What sort of work was your mining operation motor doing before? I just did a little reading on mining operations and electric motors, and it sounds like there are dozens of electric motors used in mining operations for all sorts of applications. Motors used in traction applications (like a forklift traction motor, not the hydraulic lift motor) make the best EV conversion motors.

Some considerations for your motor choice:

How big is it, and does it fit well in your greyhound's engine bay? How will you secure it to the chassis? How heavy is it?

Was it designed for continuous running, or intermittent?

What kind of modifications will you have to make in order to match the motor's shaft to your transmission?

What sort of torque curve does your motor have?

How is it cooled? It looked like some of those mining motors are all enclosed with an integrated cooling system.

I'm afraid I've introduced more questions than answers, so, maybe not much help in the short term.

And that wasn't even the real Debby Downer part. Here it is:

I have spoken with many people who bought a motor (cheap, salvage) and designed an electric car conversion around it. Many (most) of them were disappointed with the final product and would do it differently next time. This is a really crucial choice and the wrong motor can make you very unhappy.

Hope this helps.


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greyhound conversion
by: Anonymous

Hi Lynne-great questions. I understand the motor was used in a lime mine and ran a conveyor (I think), and I may have access to a identical (new)motor giving me 600 hp if they are dual shaft motors. more info on the motor; 300 hp/1800 rpm/TEFC/447T frame/460 V/Phase 3/2677 lbs. this is all the details I can get a hold of. hoping someone may have some insight into my idea of installing on the bus. have lots of room for batteries (in luggage compartment) and BMS, and controller. taking out all the bus seats and motor will reduce weight a lot but still hope a 300 hp motor (or two) could push me along at a moderate speed. a newbee at this, but very keen on starting my conversion already started renoing the interior. will 1800 rpm be adequate to move my bus.

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