3-Phase AC Eletric Motor Drive Systems Manufactured

For Automotive, Ground Support, Mining, Utility Vehicles, Hydraulic Pump

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hpevs golf car lithium battery pack eletric GT Ferrari 308 GTE EM parking Brake for golf cars HPEVS AC electric motors for golf cars HPEVS New software package HPEVS Curtis Controllers dimensional information HPEVS Oil Cooled AC Electric Motor for Marine Vessels EV West Factory Five build HPEVS Troubleshoot and Diagnostics 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 motorcycles HPEVS AC electric motors for industrial vehicles
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

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

Our "Original" AC Drive System For Golf Cars Just Got A Whole Lot Better With The Introduction of an Automatic Parking Brake!!

Golf Car Systems


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




To get information, please click on "Details" tab below.
We Have Developed a New Generic Software Package

New additions to this package include OBDII and Curtis Instruments enGage VII display support.


To get 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.

We Are Pleased To Announce Our New Line of Oil Cooled Motors.

These motors have a stainless steel frame, anodized aluminum junction box and end bells, totally sealed and oil cooled.

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

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




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Diagnostic and Troubleshooting Documentation.






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

144 Volt Automobile Systems

The Scion pictured has the first prototype!




Mining Vehicle Systems

Specialty motors designed and built for your specific applications!






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96 Volt Automotive Systems

This is one of many systems available for auto conversions!




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Motorcycle Systems

WHAT A RUSH!!






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Utility Vehicle Systems


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





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Links to our main drive system page
HPEVS Drive Systems

Our are powerful, efficient and reliable. Find out what our drive systems can do for your project.
Power Graphs Link

The power graphs can be accessed by clicking on the above graphic.
Schematics, Instructions and Troubleshooting

To assist you, our customers, we have compiled all the documentation needed to wire, program and troubleshoot. The wiring diagrams include documentation for on-road vehicles, golf cars and hydraulic pump applications. Click on the graphic above to open the page with the information.

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What's New

We have included a variation of the AC-20 motor called AC-23! The motor is wound to produce higher torgue compared to the AC-20 motor! Please check AC-2X motor page for more information!
AC 2x Family of Motors

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



The motor identifications on this page have been changed to "AC 5X" to reflect the addition of the AC-51 into the AC-50 family of motors.

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 Vehicles



Please contact us with any questions 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)
• 1238R-7601 (72-96V 650A)
• 1239E-8521 (144V 500A) » 12 volt logic «



AC 5X-16.02
19 spline
product image 2

19 spline coupler with a Dana or Team Industries style adaptor


AC 5X-18.02
19 spline
product image 2

19 spline coupler with Graziano style adaptor



AC 5X-26.26
Vented B-Face
product image 2

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




AC 5X-26.28
Vented B-Face

product image 2

1 1/8" Keyed Shaft
No Auxiliary Shaft



AC 5X-27.28
Non-Vented B-Face
Enclosed (not water proof) Housing
product image 2

1 1/8" Keyed Shaft
No Auxiliary Shaft


AC 5X-28.26
Vented C-Face

product image 2


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



AC 5X-28.28
Vented C-Face

product image 2

1 1/8" Keyed Shaft
No Auxiliary Shaft



AC 5X-29.28
Non Vented C-Face
Enclosed (not water proof) Housing


1 1/8" Keyed Shaft
No Auxiliary Shaft



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