HELENOID Actuators-A New Concept in Extremely Fast Acting Solenoids

The limitations of conventional solenoids will be explained and reasons given to show that as they are made more powerful their speed of operation decreases. HELENOID actuators are capable of armature travel times in less than one millisec irrespective of preloads or masses, despite the larger size and power required as the duty increases. The relationships between eddy currents and flux penetration; materials and flux leakage; inductance and power supply are illustrated, together with the way they are all interconnected and varying with time, requiring a comprehensive computer program to design for optimum performance.