CHARACTERISTICS OF NEW TYPE FLOW CONTROL CARTRIDGE VALVE USING PWM METHOD

抄録

The purpose of this study is to combine the good adaptability of PWM control to micro-processor with the adaptability of two-way cartridge valve to high power-level hydraulic systems. In this study, a special cartridge valve, called active cartridge valve, is used. The valve body is incorporated with a piston and the position of the piston, i.e. the opening of the valve, is controlled by the high speed on-off solenoid valve in the pilot circuit using PWM method. As a result the flow rate through the cartridge valve can be controlled by the high speed on-off solenoid valve. The effects of the design parameters on the characteristics of flow control cartridge valve using PWM metho are investigated.