AC Eletric Motor Drive Systems (AC-50/51)

For Automotive, Ground Support Equipment, Mining, Utility Vehicles, Hydraulic Pumps

Header Content Region

Insert text, image or banner ads here, or just delete this text and leave this area blank!

hpevs golf car lithium battery pack HPEVS AC electric motors for golf cars EM parking Brake for golf cars HPEVS 144 volt Drive System HPEVS AC Electric Motor for Mining Industry HPEVS AC Electric motor, 96 Volt Drive System HPEVS AC electric motors for industrial vehicles HPEVS Troubleshoot and Diagnostics
Our "Original" AC Drive System For Golf Cars Just Got A Whole Lot Better With The Introduction of an Automatic Parking Brake!!

HPEVS Golf Car Drive Systems

The "ORIGINAL", and still the best AC drive system available for your golf car!

Now Our Golf Car Drive Systems Come With
a 5 Year Warranty!!
We have Designed and Developed A Lithium-Ion Battery Kit For Golf Cars That Is Completely Integrated With The HPEVS Golf Car AC Drive Systems

144 Volt Automobile Systems

The Scion pictured has the first prototype!





Mining Vehicle Systems

Specialty motors designed and built for your specific applications!





To get information, please click on "Details" tab below.
96 Volt Automotive Systems

This is one of many systems available for auto conversions!



To get information, please click on "Details" tab below.
Utility Vehicle Systems


We have a drive system to fulfill your utility vehicle requirements!




To get information, please click on "Details" tab below.
Diagnostic and Troubleshooting Documentation.





To obtain this information, please click on "Details" tab below.

We have added to our website dimensional drawings of the Curtis Instruments controllers.

These drawings can be helpful during the design phase of a project.

To get information, please click on "Details" tab below.
Hosts Mike Brewer and Edd China From The TV Show Wheeler Dealers Teamed Up with EV West to Install a HPEVS Drive System Into a 1985 Maserati Bi Turbo

It is Amazing To Us To See What Can Be Done With Our Drive Systems! Here Is Yet Another Example!

The Folks at EV West Have Created a Vehicle with One of Our Drive Systems!



To get information, please click on "Details" tab below.


small portfolio1 small portfolio2 small portfolio3 small portfolio4 small portfolio5
Innovation in Motion, Powered by Electricity
get in touch
Links to our main drive system page
HPEVS Drive Systems

Power Graphs Link

Schematics, Instructions and Troubleshooting

Main Menu:

What's New


ebay logo

We have items in the shop that we are selling on ebay.

Newsletter Signup

Recent Events

Describe the photo or the page it links to

The Recent Events content includes an image that 'AUTO' scales. No need to resize the image, the CSS style sheet will resize the images for you, once rendered in your web page.

HPEVS AC Electric-Motor Drive Systems (AC-50/AC-51)


The AC 50 motor is an 8" motor that is capable of producing 71 horsepower and 120 ft-lbs. of torque. It was designed for use in an automotive application with a curb weight of 3500 lbs or less. This system is used in other vehicles that require the torque and horsepower that this motor supplies. It is available with or without a 7/8" auxiliary shaft.

With the introduction of the new Curtis 144 volt controller we are now offering the AC-51 motor. This motor is designed to work with the new controller allowing for peak torque to go out further in the RPM range.

The AC 51 motor is the same 8" motor that has been designed around the Curtis 144 volt controller. It is capable of producing 88 horsepower and 108 ft-lbs. of torque. It was designed for use in an automotive application with a curb weight of 4000 lbs or less. This system is used in other vehicles that require the torque and horsepower that this motor supplies. It is available with or without a 7/8" auxiliary shaft as well.

The weight of the AC 50 and AC 51 motors are around 115 pounds/52.2 Kg.

This motor is also very popular in the mining industry. We manufacture an enclosed (not water proof) version of this motor that is used for personnel carriers.

Link to power graphs:

Link to power graphs:



Here is a list of the typical applications for which this motor can be applied:

» Automotive
» Mining
» Utility Vehicles
» Ground Support Equipment



for any questions that you might have.

OEM customers, please contact us

Of course all our systems are backed by an HPEVS and Curtis


Controller Option:

• 1236SE-5621 (48V 600A)
• 1238E-6521 (48-80V 550A)
• 1238E-7621 (72-96V 650A)
• 1239E-8521 (144V 500A) » 12 volt logic «



AC 50/51-16.02

19 spline
product image 2

19 spline coupler with a Dana or Team Industries style adaptor


AC 50/51-18.02

19 spline
product image 2

19 spline coupler with Graziano style adaptor



AC 50/51-26.26

Vented B-Face
product image 2

1 1/8" Keyed Shaft
with 7/8" Auxiliary Shaft




AC 50/51-26.28
Vented B-Face

product image 2

1 1/8" Keyed Shaft
No Auxiliary Shaft



AC 50/51-27.28
Non-Vented B-Face
Enclosed (not water proof) Housing
product image 2

1 1/8" Keyed Shaft
No Auxiliary Shaft


AC 50/51-28.26

Vented C-Face

product image 2


1 1/8" Keyed Shaft
with 7/8" Auxiliary Shaft



AC 50/51-28.28

Vented C-Face

product image 2

1 1/8" Keyed Shaft
No Auxiliary Shaft



AC 50/51-29.28

Non Vented C-Face
Enclosed (not water proof) Housing


1 1/8" Keyed Shaft
No Auxiliary Shaft




Single Shaft Pump Motors

AC 50/51-31.08

SAE B Pump Flange


SAE B 15T Pump Coupler with
Motor Mounting Base




AC 50/51-31.09

SAE B Pump Flange


SAE B 13T Pump Coupler with
Motor Mounting Base






Dual Shaft Pump Motors

AC 50/51-31.58

SAE B Pump Flange



SAE B 15T Pump Coupler with 7/8" keyed Auxiliary Shaft & Motor Mounting Base


AC 50/51-31.59

SAE B Pump Flange



SAE B 13T Pump Coupler with 7/8" keyed Auxiliary Shaft & Motor Mounting Base


slide up button