초록 ▼

The burner system (17) includes a burner (28), an air/fuel supply, and a burner control (12) that includes a pair of valve assemblies (13,14) with a flow control (18) and two valve actuators (10,11). A position encoder (108) is rigidly connected to the flow control member (18) and generates valve po

The burner system (17) includes a burner (28), an air/fuel supply, and a burner control (12) that includes a pair of valve assemblies (13,14) with a flow control (18) and two valve actuators (10,11). A position encoder (108) is rigidly connected to the flow control member (18) and generates valve position signals. Control modules (112 are programmed to drive and store calibration parameters specific to the position encoder (108). During operation, the control modules command positioning of the flow control member (18) and compare the position signals to the stored positions to determine correct valve position.

대표청구항 ▼

[ What is claimed is:] [1.]1. A valve actuator assembly adapted to be connected to a flow-control valve member positioned to lie in a flow path of a fluid supply system, the valve actuator assembly comprisinga housing,a driver coupled to the housing, the driver including a stepping motor, a gear ass

[ What is claimed is:] [1.]1. A valve actuator assembly adapted to be connected to a flow-control valve member positioned to lie in a flow path of a fluid supply system, the valve actuator assembly comprisinga housing,a driver coupled to the housing, the driver including a stepping motor, a gear assembly connected to the stepping motor, and a shaft connected to the stepping motor and configured to move a flow-control valve member positioned in a flow path of a fluid supply system from an actual valve position to a desired valve position to regulate the flow of fluid through the flow path, anda controller coupled to the stepping motor and configured to command the stepping motor to position the flow-control valve member in the desired valve position, the controller including a control module and a sensor, the control module being programmed to receive a position command and to instruct the stepping motor to move the flow-control valve member to the desired valve position based on the position command, the sensor being coupled to the control module and the shaft to indicate the actual valve position of the flow-control valve member using a valve position signal generated by the sensor and sent from the sensor to the control module, the control module being programmed to receive and compare the valve position signal received from the sensor to calibration parameters to determine whether the valve is in the desired valve position and to instruct the motor to reposition the flow-control valve member in the desired valve position.