Research on a New Direct Driven Electro-hydraulic Servo Valve

Based on a permanent-magnet polarized bidirectional proportional solenoid and a high-pressure eddy current displacement sensor,a new direct driven electro-hydraulic servo valve was presented.Simulation analysis was given.The driving circuits for the valve were designed and experimental research was carried out.The experimental result agrees well with the simulated result.It shows that the servo valve has good static characteristic.