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Satellite TV receivers & systems support forums
DISH SETUP: Single sat, Multi-Sat & Motorised
Dish motor less wear and tear
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<blockquote data-quote="Channel Hopper" data-source="post: 1024678" data-attributes="member: 175144"><p>An actuator is an inductive load, not unlike a large loudspeaker.</p><p></p><p>During operation, at the point of initialising the load has two draws from the supply, the actual drive load, and the energising load.</p><p></p><p>The latter does not require a specific voltage to get things moving, but the energising should be fast enough to stop this drain from causing loss in the drive. If the voltage is too high this can cause breakdown of the winding insulation, if too low then the windings heat up before the actuator turns and could become distorted.</p><p></p><p>A large supply is necessary on a large actuator , elsewhere on the forum there is a thread on an actuator controller that has to be modified with an updated transformer to work on bigger dish systems.</p><p></p><p>Additionally the ideal supply for an inductive load is also inductive, ithe the impedance of the windings closely matching that of the actuator at the other end, taking into account the resistance of the cable between them, which could be in the region of a few ohms over a long distance.</p><p></p><p>Lastly the relay system for reversing and dumping of the back emf should be 'clean' in terms of the contacts to prevent arcing, with a capacitor system that neutralises the inductive pulse that travels back to the supply.</p></blockquote><p></p>
[QUOTE="Channel Hopper, post: 1024678, member: 175144"] An actuator is an inductive load, not unlike a large loudspeaker. During operation, at the point of initialising the load has two draws from the supply, the actual drive load, and the energising load. The latter does not require a specific voltage to get things moving, but the energising should be fast enough to stop this drain from causing loss in the drive. If the voltage is too high this can cause breakdown of the winding insulation, if too low then the windings heat up before the actuator turns and could become distorted. A large supply is necessary on a large actuator , elsewhere on the forum there is a thread on an actuator controller that has to be modified with an updated transformer to work on bigger dish systems. Additionally the ideal supply for an inductive load is also inductive, ithe the impedance of the windings closely matching that of the actuator at the other end, taking into account the resistance of the cable between them, which could be in the region of a few ohms over a long distance. Lastly the relay system for reversing and dumping of the back emf should be 'clean' in terms of the contacts to prevent arcing, with a capacitor system that neutralises the inductive pulse that travels back to the supply. [/QUOTE]
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Satellite TV receivers & systems support forums
DISH SETUP: Single sat, Multi-Sat & Motorised
Dish motor less wear and tear
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