IS200EDCFG1BAA 激励器DC反馈板

Part No.: IS200EDCFG1BAA
Manufacturer: General Electric
Country of Manufacture: United States of America (USA)
Size: 15.9 cm high x 10.2 cm wide
Technology: Surface-mount
Temperature Operating: -30 to 65oC
Product Type: Exciter DC Feedback Board
Availability: In Stock
Series: EX2100

Functional Description

IS200EDCFG1BAA is an Exciter DC Feedback Board developed by GE. It is a part of the EX2100 excitation system. The EDCF board measures both field current and voltage across the SCR bridge within the EX2100 series drive assembly. Additionally, it serves as an interface with the EISB board via a high-speed fiber-optic link connector. An integral part of this board is its LED indicator, which provides visual feedback on the proper functioning of the power supply.

Features

• Fiber-Optic Interface: One of the key features of the board is its interface with the EISB board in the control panel via a high-speed fiber-optic link. This innovative communication method offers several advantages, including voltage isolation and high noise immunity, ensuring reliable data transmission between the two boards.
• Plastic Type Fiber: This type of fiber is suitable for distances of up to 10 meters, making it ideal for shorter connections within the control system setup.
• Hard Clad Silica Type: Designed for longer distances, the hard-clad silica type fiber supports connections of up to 90 meters. This option provides flexibility in system layout and installation, allowing for efficient signal transmission over extended distances.
• Minimum Bending Radius: It’s important to note that both types of fibers have a minimum bending radius requirement of 1.5 inches. Adhering to this specification ensures proper handling and installation of the fiber cables, preventing signal degradation and maintaining signal integrity.

Field Current Feedback

• Field Current Measurement: The field current feedback mechanism plays a crucial role in monitoring the electrical current across a DC shunt located at the SCR bridge within the control system. This setup generates a low-level signal proportional to the field current, with a maximum amplitude of 500 millivolts (mV).
• Signal Processing: The low-level signal generated by the DC shunt is input to a specialized circuit known as a differential amplifier. This amplifier is responsible for amplifying the signal while also providing differential amplification to enhance its accuracy and robustness. The output voltage from the differential amplifier is carefully regulated and ranges between -5 volts (V) to +5 volts (V).
• Voltage Controlled Oscillator Integration: The regulated output voltage from the differential amplifier serves as the input signal to a voltage-controlled oscillator (VCO). A VCO is an electronic oscillator whose oscillation frequency is controlled by a voltage input. In this context, the VCO adjusts its oscillation frequency based on the magnitude of the input voltage received from the amplifier.
• Signal Range and Control: The output frequency of the VCO is directly proportional to the amplitude of the input voltage signal. By modulating the frequency of oscillation, the VCO effectively translates variations in the field current into corresponding changes in the output frequency. This frequency modulation provides a dynamic representation of the field current status, enabling precise monitoring and control within the control system.