GE IC3600SOSF1 LVDT Oscillator Card

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The GE part number IC3600SOSF1 is a Linear Variable Differential Transformer (LVDT) Oscillator Card. This card is a specialized electronic circuit board that is a component of industrial control systems, particularly in legacy GE turbine controls. Its primary function is to generate the alternating current (AC) signal needed to power an LVDT sensor.

How it Works and its Purpose

A Linear Variable Differential Transformer (LVDT) is a sensor used to measure linear position or displacement. It works by converting the physical position of a core within a set of coils into a proportional electrical signal. The LVDT requires a specific AC excitation signal to operate. This is where the IC3600SOSF1 comes in.

• Excitation Signal Generation: The card contains an oscillator circuit that produces a stable, constant-amplitude AC sine wave. This signal is then fed to the primary coil of the LVDT sensor.
• Signal Conditioning: Beyond just generating the signal, the card ensures that the signal is clean and stable, which is crucial for the LVDT’s accuracy. It filters out electrical noise and ensures a constant frequency and amplitude.
• Completing the Loop: The LVDT sensor, powered by the card, produces an output signal (also AC) whose amplitude and phase correspond to the position of its core. This signal is then sent back to other parts of the control system (like a demodulator card) to be interpreted and used to control a process, such as a valve or a turbine’s fuel system.

The IC3600SOSF1 is a vital part of the sensor’s signal chain. Without it, the LVDT would not be able to function, making it an essential component for any system relying on this type of position feedback.

Applications

The IC3600SOSF1 is found in any industrial application that uses LVDT sensors for precise position measurement.

• Power Plants: It is commonly used in turbine control systems to measure the position of control valves, governor valves, and other actuators that regulate steam or fuel flow.
• Industrial Automation: It can be used in other industrial machinery where precise linear position measurement is required.

Related Products and Alternatives

While this is a legacy GE product, the concept of a dedicated oscillator card for an LVDT is not unique. Modern control systems, however, often integrate this functionality into a single module that includes both the oscillator and demodulator.

• Moog LVDT Signal Conditioners: These are modern, compact modules that perform both the oscillator and demodulator functions.
• GE Mark V/VI Series Cards: Newer generations of GE’s turbine control systems have more advanced and integrated modules for LVDT sensing.