Electrohydraulic device for electrical machines e.g. wind generator. , has hydraulic actuator with piston, and cylinder having high pressure hydraulic pump feeding fluid to piston via channel integrated in cylinder

摘要

The device has a hydraulic actuator with a piston, and a cylinder (30) with high pressure hydraulic pump (32). The piston is secured to control and synchronization ring in which off-center wrist pins are fixed in blade roots. A hydraulic fluid from the pump is fed to the piston via channel (34). An electric motor (36) with an inductor and an armature is controlled and powered by an electricity generator (38).