Sprint Electric 3600XRi Series DC Drives

The Sprint Electric 3600XRi series is a compact range of four-quadrant regenerative DC motor drives that are designed for permanent magnet and shunt-wound DC motors. The range provides reversible motoring and regenerative braking, with isolated control electronics and various control functions for industrial speed and torque applications.

Industrial Motor Warehouse supplies Sprint Electric 3600XRi drives for applications where controlled acceleration, deceleration, forward/reverse operation, and regenerative braking are required within a compact open-chassis package.

Available variants cover different current, voltage, and power requirements, allowing engineers to select a drive according to motor armature voltage, continuous armature current, supply configuration, and application requirements.

Quick Answer: What Is the Sprint Electric 3600XRi?

The Sprint Electric 3600XRi DC drive is a four-quadrant regenerative controller for permanent magnet and shunt-wound DC motors. Depending on the model, the range supports single- or two-phase AC input configurations, with versions available across different current and armature-voltage ratings.

The drive provides four-quadrant operation, meaning it can control motor torque in both rotational directions while also allowing regenerative braking. Sprint Electric specifies features including dual speed setpoints, direct pushbutton control for start/stop, direction and jog functions, multiple I/O, 4Q torque input, 2Q torque input, and a regen-to-zero input.

Sprint Electric 3600XRi: Technical Overview

The 3600XRi is intended for applications where a conventional two-quadrant DC drive does not provide sufficient control over braking and reverse operation.

Key characteristics include:

• Four-quadrant, fully regenerative DC operation
• Suitable for permanent magnet and shunt-wound DC motors
• Isolated control electronics
• Compact open-chassis construction
• Multiple I/O connections
• Forward and reverse operation
• Jog and start/stop control
• Dual speed setpoint capability
• Adjustable acceleration and deceleration
• Adjustable minimum and maximum motor speed
• Forward and reverse current limiting
• Regenerative braking control
• 2Q and 4Q torque inputs
• Regen-to-zero functionality

The available variants extend from low-current models through higher-rated 32 A versions. For example, the 3600XRi/16/LL is rated at up to 16 A and can provide up to 4 kW with a 360–440 VAC supply, while the 3600XRi/32/LL provides up to 32 A and up to 7.5 kW under the corresponding supply conditions.

How a 4-Quadrant DC Drive Works

A 4-quadrant DC drive controls both the direction of motor rotation and the direction of motor torque. This is important in machinery that needs quick changes between motoring and braking states.

Unlike a basic two-quadrant drive, a four-quadrant system can transition between forward and reverse motoring while also controlling regenerative braking in either direction.

This makes the 3600XRi relevant to machinery that needs controlled reversing, braking, positioning-related motion profiles, and repeated acceleration/deceleration cycles.

Regenerative DC Drive Operation

A regenerative DC drive returns electrical energy generated during braking to the AC supply rather than relying mainly on a dissipative braking behavior.

When the driven load forces the DC motor to decelerate, the motor can operate as a generator. The drive controls this regenerated energy while managing the torque and speed of the motor.

The practical advantage is particularly relevant to applications with frequent braking or reversing. However, the complete installation must be engineered around the supply arrangement, drive rating, motor characteristics, and the requirements of the electrical system in the machine.

Can 3600XRi Be Used as a Servo DC Drive?

The term DC servo drive is generally associated with closed-loop motion control, where motor feedback is used to obtain accurate speed, torque, and position control.

The 3600XRi should therefore be selected according to the actual feedback and control requirements of the application rather than being treated as a universal servo amplifier. Sprint Electric’s information identifies the product as a four-quadrant regenerative controller for permanent magnet shunt-wound motors and highlights its torque inputs, speed setpoints and adjustable operating parameters.

For applications that need dedicated high-performance enclosure-based servo control, engineers should verify the feedback architecture and required control accuracy against the specific drive model and application.

Selecting a Sprint Electric 3600XRi

Drive selection should start with the DC motor nameplate and the machine’s operating cycle rather than simply matching nominal motor power.

Important parameters include:

• Continuous armature current: The drive must be capable of supplying the motor’s required continuous current without exceeding its thermal rating.
• Motor armature voltage: Confirm that the drive’s available DC output range matches the motor’s rated armature voltage.
• Peak and braking current: Repeated acceleration, deceleration, and regenerative braking can impose higher current demands than steady-state operation.
• AC supply: Check the required input voltage phase arrangement for the selected 3600XRi variant.
• Motor type: Sprint Electric specifies the 3600XRi for permanent magnet and shunt-wound DC motors.
• Four-quadrant requirement: Confirm that the machine actually needs regenerative braking and reverse motoring before selecting a 4Q drive.
• Control method: Consider the available setpoints, digital inputs, torque commands, speed feedback requirements, and machine control architecture.

3600XRi Applications

The 3600XRi’s combination of reversing, regenerative braking, and adjustable acceleration/deceleration makes it applicable to machinery where controlled DC motor operation is required.

Typical application considerations include:

• Material handling equipment
• Conveyors need controlled braking
• Machine tools
• Winding and unwinding machinery
• Printing machinery
• Industrial process equipment
• Hoisting-related auxiliary machinery
• Test and laboratory equipment
• Machinery requiring frequent forward/reverse operation
• Retrofit projects involving existing DC motors

3600XRi Models and Ratings

The collection includes different 3600XRi configurations to accommodate different motor and supply requirements.

Why Choose Industrial Motor Warehouse for 3600XRi Drives?

Industrial Motor Warehouse supplies Sprint Electric DC drives for UK industrial applications, including replacement and retrofit requirements.

The 3600XRi range is particularly relevant where an existing DC motor installation needs a compact four-quadrant regenerative controller without moving immediately to a completely different motor technology.

For replacement projects, engineers should compare the existing drive’s armature voltage, current rating, control signals, motor feedback arrangement, terminal configuration and physical installation requirements before ordering. Product-specific documentation should always be checked against the existing panel and motor.

Select the Correct 3600XRi DC Drive

Choosing a regenerative DC drive needs more than matching kW. Motor armature voltage, continuous and braking current, AC supply, motor type, duty cycle, control signals, and regenerative requirements all need to be considered.

Browse the Sprint Electric 3600XRi collection at Industrial Motor Warehouse to compare available variants and technical specifications. If the application is a replacement or retrofit, use the existing drive and motor data in order to identify the correct current and voltage configuration before placing the order.