ETEL’s New Thermal Module Ensures Motor Protection
May 31, 2015
Brian Zlotorzycki, Product Specialist, ETEL Motors, 847-755-5569
Schaumburg, IL (May 2015) – ETEL presents the IMTHP, a thermal module that serves as an accessory to ETEL’s torque motors, and is designed to provide absolute motor protection from overheating. This allows machine designers and users to select the right size motor at the start.
The working principle of the IMTHP revolves around reading KTY thermistors. These are temperature sensors commonly found in torque motors which read as resistors whose value changes as its temperature increases. KTY sensors are very accurate but unfortunately have a delay in their output signal if the temperature change is too quick.
This is where the IMTHP comes into play. While monitoring readings from three KTY sensors (one on each phase which is standard on all ETEL torque motors), it uses a built-in algorithm which detects any steady increase in the KTY sensor output. The IMTHP provides a corrected analog temperature signal, allowing the user to have a precise and continuous monitoring of the actual temperature in the motor. It also outputs a simple digital warning/error signal that can be used without complex data processing on the controllers part, and have the machine properly react if any problem is ever detected. This ensures a reliable safety measure for prototype testing and the ability to handle unexpected loads.
The IMTHP is able to take the input of sensors on each of the three phases and output them as one signal so even if the controls operating the motor only have one sensor input, all three phases can still be monitored. This is also invaluable under stall conditions where one phase would have significantly more current than the other two.
The IMTHP has the advantage of allowing engineers to not have to oversize a motor for an application, or put a limit on the current input for fear of overheating. That way an optimum motor can be selected, without incurring the cost of having to order an extra-large motor.
All these benefits ensure that less safety measures are necessary during motor operation, allowing optimum performance of the machine and a quick response to any unexpected overheating preventing any machine downtime when operating in the field.
ETEL S.A. is based in Switzerland with exclusive North American distribution through HEIDENHAIN Corporation in Schaumburg, IL. As a leading international supplier of direct drive and motion control components and integrated systems, ETEL supports high tech industry with linear motors, torque motors, positioning stages, and motion controllers/systems. With over 160 customers in over 20 countries and maintaining the status of having one of the largest market shares for torque motors, ETEL proves to be a prime example of creating advanced and innovative motor designs.
For more information on ETEL’s products and services, visit www.etelusa.com, or contact Public Relations Manager Kathleen Stoneski at HEIDENHAIN at 847-519-4702 or ETEL Product Specialist Brian Zlotorzycki at 847-755-5569.