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AC Motor Controllers

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The Way of the Future

Curtis AC Induction motor speed controllers represent the next level in drive systems for material handling and industrial vehicles, offering lower maintenance, higher performance and greater flexibility. The new Curtis AC controller family delivers an exceptional level of sophistication and adaptability for vehicle designers and end-users. Curtis AC controllers come in compact, fully sealed housings with advanced thermal management. These controllers combine the renowned power and smoothness of Curtis speed controllers with a Programmable Logic Controller to provide rugged strength and unequalled flexibility. From this powerful fusion came the next evolution in motor speed controllers - VCL.
AC

 
Model
Description
Application
Click Image to 
Download Data Sheet
1222
  • Electric Power Steering
  • 24-48V
  • 70A
The Curtis Model 1222 is an AC induction motor controller for ‘steer by wire’ electric power steering systems. In these systems, the steering motor functions as an actuator to change the angle of the vehicle’s steered wheel(s) and so change the direction of travel. The Model 1222 performs as the steering system controller, interpreting the steering command input and wheel position feedback, then driving the steering motor to move the steered wheel to the desired position.
Designed for 300–1500W AC induction gearmotors. Intended applications are materials handling vehicles such as reach trucks, order pickers, stackers, ‘man up’ warehouse trucks and other similar industrial vehicles.
1222 

 
Data Sheet    
1232
  • Traction or Pump
  • 24V
  • 150-250A
The Curtis Model 1232 provides advanced control of AC induction motors performing on-vehicle traction drive or hydraulic pump duties. It offers vehicle developers a highly cost-effective combination of power, performance and functionality.
Curtis Model 1232 is designed primarily for Class 3 material handling vehicles, such as walkie pallet trucks. It is equally suitable for any traction or pump control application.
1232 

 
Data Sheet    
1234
  • Traction or Pump
  • 24-48V
  • 200-350A
Advanced motor drive software provides smooth control over full speed and torque in all modes, including full regenerative braking, zero speed, and torque control. Specialized I/O and software features allow economical and effective control of electromagnetic brakes and hydraulic systems.
The Curtis 1234 Motor Speed Controller is designed for use in all types of electric vehicles including material handling, industrial, golf, and light-on-road. Generic software and VCL code is included for control of powered pallet jacks. Other applications can be easily supported with alternate VCL programming.
1234 

 
Data Sheet    
1236/1238
  • Traction or Pump
  • 24-80V
  • 1236: 300-500A
  • 1238: 550-800A
AC Induction Controller. Advanced motor drive software provides extremely smooth control over full speed and torque ranges in all modes including full regenerative braking, zero speed, and torque control.
The Curtis Model 1236 and 1238 Motor Speed Controllers are designed for use in all ranges of electric vehicles including material handling, industrial, golf and light-on-road.
1236/1238 

 
Data Sheet    
1238R
  • Traction or Pump
  • 72-96V
  • 550-650A
The Curtis Model 1238R provides control of AC induction motors performing on-vehicle traction drive duties. It offers vehicle developers a highly cost-effective combination of power, performance and functionality.
Designed for use as a traction controller for On-road electric and hybrid passenger vehicles using 72-96V system voltages, and other similar applications with low or medium duty cycle.
1238R 

 
Data Sheet    
1298
  • Combined AC Traction and DC Pump
  • 24V
  • 250-300A
This Integrated AC Traction & Hydraulic System controller combines advanced AC traction motor control with solid state DC hydraulic pump and proportional valve control to provide a complete economical intgrated package.
Primarily for Class III material handling vehicles requiring variable speed or soft start and stop control of the lift and lower functions.
1298 

 
Data Sheet