DSI/Dynamatic
About
DSI/Dynamatic, operating as Drive Source International, is headquartered in Sturtevant, Wisconsin and manufactures eddy current adjustable speed drives, brakes, and controls for industrial motor speed regulation. The company traces its origins to 1931 when the Winther brothers founded Dynamatic Corporation in Kenosha, Wisconsin, originally developing eddy current clutch technology for automotive applications before expanding into industrial speed control. DSI/Dynamatic's core product line spans air-cooled eddy current drives including the Dynamatic AS and FAS series, AT series, DCD series, and CES series, each designed for variable speed control of pumps, fans, and conveyors. For the water and wastewater sector specifically, the company offers SPMV Drives and SPC Couplings engineered for pump speed control and energy optimization in municipal treatment facilities. Water-cooled drives and couplings handle high-power applications requiring superior heat dissipation. The brake lineup covers both air-cooled and water-cooled eddy current brakes for speed reduction and load holding. DSI/Dynamatic's controls division produces the Digital CES Press Drive Controller, DSI-700 digital platform, EC-2000 programmable controls, and legacy Mark III, 3000, and 4000/4050 analog controllers. The company also provides comprehensive aftermarket services including factory rebuilds using original prints and tolerance specifications, control board repair, remanufacturing, emergency field service, installation and start-up assistance, and educational training programs. Their TRUE System Efficiency initiative focuses on optimizing total drive system performance rather than individual component efficiency alone.
Key Products
Air-cooled eddy current adjustable speed drives for controlling motor speed on pumps, fans, and conveyors
Air-cooled eddy current adjustable speed drives for general industrial speed control applications
Air-cooled eddy current drives for variable speed control in industrial and municipal applications
Air-cooled Constant Energy Savings drives providing adjustable speed for energy-efficient pump and fan operation
Purpose-built eddy current variable speed drives for water and wastewater pump speed control and energy optimization
Eddy current couplings designed for water and wastewater applications enabling soft-start and adjustable speed operation
Liquid-cooled eddy current drives for high-power applications requiring superior heat dissipation
VFDs for electronic motor speed control across pump, fan, and process applications
Electromagnetic brakes using eddy current technology for speed reduction and load holding in industrial applications
Liquid-cooled electromagnetic brakes for high-dissipation speed control and stopping applications
Digital control system for CES drive press applications providing precise speed and torque regulation
Digital control platform for eddy current drives offering modern communication and diagnostics capabilities
Electronic control system for eddy current drives with programmable speed setpoints and monitoring
Analog control system for legacy eddy current drive operation and speed regulation
Analog control platform for basic eddy current drive speed regulation and monitoring
Advanced analog control systems for eddy current drives with expanded functionality and interface options
OEM replacement components manufactured to original factory prints and tolerance specifications for legacy and current drives
Factory remanufacturing of eddy current drives to restore performance to original specifications
Repair and refurbishment of drive control circuit boards to extend equipment service life
Field engineering services for proper drive installation, alignment, and commissioning
Training programs covering eddy current drive operation, maintenance, and troubleshooting
Service Area
National coverage
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