INMOCO has added a range of advanced electromechanical actuators (EMAs) to its portfolio. These Diakont units are for steam turbine applications and offer an alternative to hydraulic actuators for pilot and steam control valves. Complementary control systems are also available.
Steam turbine electromechanical actuators deliver increased performance, safety and stability compared to traditional solutions and the Diakont technology also provides dual redundancy and failsafe features.
These EMAs are based on precision machined roller screws which are integrated with high-performance permanent magnet synchronous motors (PMSM) and electromagnetic clutches to form a single compact unit. Mechanical failsafe is provided by powerful closure springs and redundancy is created by dual parallel control channels.
The roller is positionable to within 0.01mm or 0.0004in, which means steam pressure can be precisely maintained, thus improving the turbine’s power performance compared to hydraulic and pneumatic actuation systems. The thread geometry ensures a large contact area compared to ballscrew actuators, ensuring a long and reliable working life (100,000hrs MTBF), and higher load force capacity.
