Special Plastic Coupling Prevents Current Leakage

13th September 2010
Posted By : ES Admin
Special Plastic Coupling Prevents Current Leakage
In a solar panel high voltage capacitor manufactured by a Japanese consumer electronics company, there is a very high potential difference between the core of the capacitor and a small, earthed gearbox. The manufacturer therefore had to ensure that the flexible misalignment coupling chosen to connect the drive from the gearbox to a lead screw would not allow any current leakage.
Huco Dynatork was therefore given the task of developing a suitable candidate for the application. Its highly cost-efficient Multi-Beam coupler was selected as being the most suitable design. It is ideal for a variety of precision motion applications which require torsional stiffness and zero backlash. However clearly it had to be manufactured from a non-standard material to prevent current leakage across the drive.

To achieve the required high resistance Huco Dynatork considered a variety of plastics but eventually selected Victrex PEEK™. This polymer is characterised by high mechanical strength in high temperatures, has good chemical resistance and electrical insulation properties.

“The power distribution across the Multi-Beam in this application is 35,000 Volts so the high dielectric strength PEEK material proved the best,” explains David Lockett, Managing Director of Huco Dynatork. “The coupling is working extremely well for this customer and we can now offer this solution to other manufacturers whose drive application involves elevated temperatures.”

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