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The Importance of Thermal Protection for Torque Motors

Brian Zlotorzycki, HEIDENHAIN Product Specialist, ETEL Motors

When talking about high-end machining or manufacturing applications dealing with direct drive technology, one of the biggest key advantages of going with this particular transmission method is its endurance.  Because of the nature of direct drive motors, they are able to operate at peak performance levels indefinitely without any kind of wear or aging as long as the motor isn’t pushed past its capacity.  Unfortunately, because this isn’t a perfect world, unexpected things can happen which can cause the motor to overheat.  Whether it is through a parameter being input incorrectly or an unexpected external force causing more resistance than expected, it is important to have certain forms of thermal protections put into place.  Since torque motors are built in a way where they cannot be repaired and keep their efficiency at the same time, it is vital to prevent any overheating so that buying a new one won’t be necessary. MORE

Accelerated Optimization & Advanced Analysis for Electrical Machines and Drives Boost Motor and Drive Testing Productivity, Capability and Data Analysis

Mike Hoyer, Applications Engineer • HBM Test and Measurement

Evaluating motor efficiency has become extremely important since significant efforts are focused on more efficient electrical machines and drives. The main issue is how to implement an accelerated procedure that obtains the motor or drive efficiency for all operating points safely, accurately and rapidly. Ordinary test methods using a typical power analyzer only offer inadequate numerical results. To get beyond numerical results, all electrical, mechanical and physical signals must be acquired simultaneously at high sample rates coupled with advanced real-time custom analysis and fast data transfer to automation systems making it possible to accurately and rapidly perform electric motor and drive efficiency mapping and almost any type of advanced analysis. MORE

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