RPM III

ABB Baldor-Reliance RPM III DC shunt wound motors deliver stable, repeatable speed control with rugged reliability—ideal for processes where load changes can’t be allowed to change product quality.

High-Performance DC, Made Serviceable

The RPM III DC motor is ideal for processes where speed accuracy directly impacts product quality and throughput. Shunt-wound design provides superior speed regulation, while the laminated frame and service-friendly features help reduce downtime and simplify maintenance even in small compact spaces.

Technical data

Laminated square-frame DC shunt wound motors available in multiple enclosures and stocked ratings through 500 HP, with Class F insulation, PLS bearing lubrication, tachometer/thermostat adaptability, high-limit thermostats and service-line brushes designed for faster maintenance. Compatible with SCR controls (Power Code K and C options).

Up to 500Hp

Power range 1.5-500Hp (1.1-373kW).

Protection Class F

Insulation system for maximum reliability and inverter use.

SCR Controls Power Code C & K

Provide either maximum speed-control flexibility or simplified SCR integration to match equipment's needs.

Enclosures Open & Enclosed

DPG (Drip Proof Guarded), DPG-FV (Force Ventilated), TEFC (Totally enclosed fan cooled), TENV (Non-Vent), TEAO (Air-Over), TEDC (Dual Cooled), XP (Explosion Proof).

DC motor type Shunt wound

Maintains consistent speed as load changes, protecting process quality and throughput.

Frame Square laminated

Torque dense design and improved commutation with improved heat dissipation.

Explore the key features and benefits

RPM III DC motor delivers precise, stable speed control with a compact, serviceable laminated-frame design that improves reliability and uptime in demanding SCR-controlled applications.

Superior Speed Control

Consistent production speed, smoother operation and fewer process variations - DC shunt-wound motors maintain very stable speed even when the load increases or decreases.

Space-saving

Compact, Power-Dense Frame — Laminated construction delivers strong DC performance in a smaller footprint to reduce mounting space.

Thermal Efficiency

Laminated square frame supports smoother commutation and better heat dissipation for longer component life.

Adjustable Field

Shunt wound DC motors allow users to fine-tune torque and speed through field control, providing greater flexibility, higher top-end speed and optimized performance that PM designs cannot achieve.

Built for Serviceability

Service-line brushes and wear-indicating reference lines simplify inspection and speed up routine maintenance.

Long bearing life

PLS bearing lubrication system supports longer bearing and motor life in continuous-duty environments.

Control-Ready

Tachometer adaptable and thermostat / high-limit thermostat options support monitoring, control and protection strategies.

Related Documents

Direct Current (DC) motors, tachometers and drives

Brochure

From compact 1/8 hp permanent-magnet DC motors to 500 hp square- and round-frame models, ABB Baldor-Reliance® offers the industry’s widest DC motor portfolio.

ABB Baldor-Reliance Integral horsepower DC motors

Technical catalog for selecting integral hp shunt wound DC motors.

ABB Baldor-Reliance DC Drive: Matched drive promotion

Product Note

For a limited time, ABB is offering a matched DC drive with every fractional Baldor-Reliance DC motor purchased (1/4 - 5Hp).

Related videos

Related motors

RPM AC Inverter Duty

ABB Baldor-Reliance®

The RPM AC Inverter Duty motor is most suitable for tough variable speed industrial applications where high performance and power density (compact size and weight) is most important.

RPM AC Extruder Duty

ABB Baldor-Reliance®

Robust, power dense Baldor-Reliance RPM AC motors are ideal for extruder applications and the plastics industry.

RPM XE eXtreme Efficient

ABB Baldor-Reliance®

As a hybrid design, the RPM XE platform utilizes permanent magnet technology but can operate across-the-line, very similar to standard induction motor

Discover ABB's Innovative Software and Tools

Unlock the power of ABB's cutting-edge software and tools designed to simplify your industrial electric motor journey. Whether you're selecting, configuring, replacing, or upgrading, our intuitive tools are here to guide you every step of the way. With ABB, finding the perfect match for your motor needs has never been easier. Explore now and make the most informed choice for your operations.

Select your motor

Search our comprehensive list of ABB Baldor-Reliance® motors and gain access to detailed product specifications, technical data and product documentation.

Configure your motor

ABB’s Motor Connector is an online tool that allows experienced users to select, customize and configure motors to exactly match their performance and application needs. 

Replace your motor

Have an existing motor you’d like to convert to ABB? Use this tool to find your ABB motor.

Upgrade your motor

Use ABB's Energy Savings Calculator to estimate your energy savings and CO2 reduction – switch to a more sustainable motor solution today.