New Concepts in Motion

Made In USA! Headquartered in  Elk River, Minnesota, Dynetic offers 100% burn in testing. Recently awarded a commendation in recognition of "Outstanding Contribution in Manufacturing" by the Governor of the State of Minnesota.

• servo motors in 1.5", 2.25" and 3.13" diameters. (NEMA 17, 23 and 34)

• torque output ranging from 5 oz-in to 800 in-lb continuous.

• output speeds up to 10,000 RPM.

• gear-motors with low backlash, high precision gearing.

• standard windings of 12, 24, 48, and 90 VDC.

• optional optical encoder, integral tachometer, and failsafe brake.

• custom shafts and end-caps to meet your exact requirements.

• custom wiring harnesses and connectors to your specifications.

• speed controls and multi-axis servo amplifiers with 115/230 VAC, 50/60 Hz input.

• custom EMI/RFI filters (to FAA standards) to meet unique requirements.

Dynetic Systems manufactures brushed DC Servo motors for high precision motion control applications. For more than 29 years Dynetic Systems Corporation has built an enviable reputation by providing it's customers with DC Motors, Motor Gear-heads, Digital and PWM Servo Drive Amplifiers, Analog Motion Systems, Optical Encoders and Tachometers.

Servo motors diameters of 1.5", 2.25" and 3.13"(NEMA 17, 23 and 34), torque output ranging from 5 oz-in to 800 in-lb continuous and output speeds up to 10,000 RPM. Gear-motors with low backlash, high precision gearing and standard windings of 12, 24, 48, and 90 VDC. Optional optical encoder, integral tachometer, and failsafe brake options. Speed controls and multi-axis servo amplifiers with 115/230 VAC, 50/60 Hz input. Sealed designs to meet IP 65 ratings for harsh environments.

Please consult with us on how Dynetic Systems Corp. can meet your needs.

Applications: Dynetic Systems can manufacture motors to fit your specific application. Dynetic Systems has experience serving defense contractors and systems integrators seeking custom servo solutions. Markets served include medical, industrial, aerospace, packaging, military and semiconductor markets to OEM's and replacement customers.

When should I use a brushed DC servo-motor? Read On!

Which motor is right for my application? The motion engineer is faced with a bewildering array of type and size of motors these days. At Dynetic Systems we are always ready to add value by assisting you to sift through the sometimes-inflated claims of other manufacturers and to correctly size motors, gear-heads, and drives for your application. We know that by helping you create the best balance between function and economy, you will achieve your goals.

One question that is often asked is "When are brushed motors the best choice, and when should I consider a brush-less motor?" Brushed motors offer a simplicity, and versatility of use that is hard to match with any other technology. With only two wires, and two pins used on your connectors, a brushed motor can be run by a DC current, SCR drives, linear, and PWM amplifiers. The simpler wiring and electronics required pays off in shorter design cycles and lower costs. This simplicity makes it much easier for your service people to understand. Brush-less motors typically require eight wires, and eight connector pins. Dedicated (and more expensive) amplifiers are required. This leaves more to go wrong and more to fail. Mis-wiring just one of the eight wires either during installation or service can destroy the motor and/or the amplifier.

Servo class brushed motors are designed with specialized magnetic circuits and lamination skew to provide smooth high quality motion with a minimum of torque ripple or cogging. Brush-less motors running with Hall effect commutation (trapezoidal commutation) exhibit torque fluctuations as the three phase current is switched during normal operation. This not only interferes with good motion, but also causes more power to be consumed (and heat generated) due to the constant acceleration and deceleration. Sinusoidal commutated brush-less motors provide for smoother running, but with the cost of needing a high resolution encoder and even more cost due to wiring and electronics.

Properly applied and sized brushed motors offer thousands of hours of brush life before the brushes need to be replaced; which can usually be easily performed in the field. In many applications, the brush life can exceed the life of the motor bearings. The bearings of brush-less motors have similar life ratings as in a brushed motor used in the same load environment. Most brush-less motors are built with 105°C insulation systems and magnets that can de-magnetize at only 150°C. All Dynetic Systems motors are rated for 155°C operation with magnets that can withstand temperatures twice as high. Higher temperature insulation is even available.

Brush-less motors certainly have application for which they are the best choice, but in the majority of applications the brushed DC servomotor performs the job cheaper and simpler, with just as much or more reliability