LOCK BEWEGT // LOCK MOVES 6 EWA CHAPTER 03 – POWER DRIVES 2024 | 01 Everything you always wanted to know about the drives of the EWA 5 and 1 series! 1. Self-locking: In all cases, a distinction is made with self-locking between static and dynamic self-locking. Static self-locking only works when stationary and can be cancelled by shaking or by vibration. This is why our self-locking drive units always have dynamic self-locking (also called auto- braking). This occurs whenever an operating gear unit comes to a complete stop automatically, for example after the motor has been switched off. Like all self-locking gear units, our gear units cannot be operated in continuous basis. 2. Load details and service life: Our nominal load details are minimum figures, not maximum figures, unlike the practice of many other manufacturers. That means that if we quote a torque rating of ‚250 Nm‘, that means that the drive unit is capable of delivering this torque rating throughout its entire service life. This explains why our drive units are renowned for having high reserves of power. On our in-house test benches, we test our units for 1000 operating hours at the nominal load quoted in the catalogue, over the specified engagement period. The drive units are designed for endurance loads depending on utilization level (actual torque levels applied), application, peak loads and engagement cycles. 3. Electric motors: We do not use standard motors. Instead, we only use motors with optimized characteristics curves, and we optimize these for each version and for every variant. They are designed in such a way that voltage fluctuations of approx. +/- 5 % can be contended with, even in the 60-Hz range. EWA 16 With integrated limit switch (optionally available with an LSC 40.10 control unit).
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