Wireless sliprings from PowerbyProxi are based on inductively coupled power transfer technology. Inductive-power transfer applies the scientific principle of electromagnetic inductance. The patented Proxi-Wave lets these sliprings achieve high efficiencies by using wireless power transfer that can harmonize itself in the field. This makes the systems resistant to changes in realworld environmental conditions and load variations.
The Proxi-Ring 240 and 750 products are completely wireless alternatives to mechanical slip rings for hydraulically controlled systems. Both models make it easy for wind turbine vendors to incorporate them in new turbines, or for wind farm operators and maintenance service providers to retrofit to existing wind turbines.
For wireless power, transmission distances can extend to 6 to 8 feet, but efficiency levels between transmitter and receiver are low. PowerbyProxi focuses on commercial applications in which transmission distances are less than 8 in. for efficiencies over 90%.
The sliprings mount at a variety of distances and ways including those for continuously rotating devices. Furthermore, it can transfer power through any non-metallic membrane, making mounting easier than traditional components. PowerbyProxi tests equipment to CE, UL, and IEC standards to ensure it does not interfere with other electronic devices.
Power transmits as a single load while a built-in data-communications system switches power to, for example, meet different device requirements off the wireless receiver. In this way, the slip rings provide wireless power and data to pitch control in wind turbines, improving wind turbine efficiency by reducing the cost of maintaining and replacing existing mechanical slip rings and their carbon brushes. The company also supplies power and data to a range of sensors deployed at more locations on wind turbines. Any size turbine can be supported.
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