Compact Hybrid Actuation System Targets Renewable-Energy Designs

With an eye toward the renewable-energy sector, Parker Hannifin Corp. unveiled a hybrid actuation system (HAS) comprised of hydraulic and electromechanical actuators for precise control and holding power. The streamlined HAS’s hydraulic system consists of a double-acting cylinder, pump, and manifold with fluid-exchange ports (all serviceable onsite).

Transfer tubes and rods are constructed out of stainless steel for corrosion protection. The system has a longer service life because internal wear items are permanently lubricated by the hydraulic fluid; it does not require external hydraulic hoses or power units. A locking mechanism, achieved via static hydraulic fluid, holds strong against mechanical stresses like wind and other impacts to further enhance the electromechanical actuation system.

An electric motor eliminates leak paths into or out of the package. The motor, which has a low amp draw with a 50% duty cycle, integrates both ac and dc voltage supplies. Two-wire operation makes it especially easy to set up, service onsite, or relocate.

The hybrid actuator can be designed into the pitch system to move photovoltaic panels or other parts with fewer actuators and controls. In addition, the Intellinder internal sensor and user interface can be added to the actuator for continuous, end-of-stroke, and go-switch cylinder feedback.

According to the company, the HAS features power density up to three times that of comparable electromechanical actuators. It can move over a megawatt from a single point, suiting it for large or small systems.

The completely enclosed body of the HAS features stainless-steel construction for resilience against rain, acidity, variations in weather, and harsh environments. It has been successfully tested in solar-tracking solar panels, wind turbines, and hydroelectric dams.