Samsung Electronics Co., Ltd.

Hee Chun

Yong-ho Kim

Young-sik Lee

A proportional solenoid valve control system is applicable to hydraulic systems of heavy equipment, automatic transmission systems and furl injectors of vehicles. This system includes main circuitry which is composed of a switching element, a proportional solenoid valves, and a current detection resistor; and a control circuit which is composed of a current command detection circuit, a rectifier, an offset circuit, a current command adding and limiting circuit, an offset circuit, a current command adding and limiting circuit, a current detection circuit, an proportional integrator-controller, a pulse width modulation comparator, and an output circuit. In addition, the system, precisely controls the load currents flowing in the proportional solenoid valves according to the current commend.

Proportional solenoid valve control system

A proportional solenoid valve control system limits the current flowing in a solenoid valve if the command current is higher than a fixed value which can be set by a user. A current command limiting circuit limits the current command by providing a fixed value as an output when a current command exceeds the predetermined level.

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Seoul, South Korea

Hee Chun