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The GE DS3815FWAA is a Freewheeling Diode Card. This card is a crucial component in electrical circuits, especially those with an inductive load (like motors, solenoids, and relays). It’s not a part of the GE Speedtronic Mark IV turbine control system, which is a common misconception due to the similar part number format.
Function and Purpose
A freewheeling diode (also known as a flyback or snubber diode) is designed to protect a switching device (such as a transistor or a relay’s internal switch) from a damaging voltage spike. This spike, also known as a back-EMF or inductive kickback, occurs when the current flowing through an inductive load is suddenly cut off. The inductor’s magnetic field collapses rapidly, inducing a very high voltage that can destroy the switch.
The DS3815FWAA card provides a safe path for this stored energy to dissipate. When the switch opens, the freewheeling diode becomes forward-biased, allowing the current to continue to flow in a closed loop through the inductor and the diode. This prevents the voltage from building up to a dangerous level, protecting the switching component and the overall circuit.
Key Features
- Voltage Spike Suppression: The primary function is to provide a low-resistance path for the inductive current, thereby clamping the voltage spike.
- Component Protection: It increases the lifespan and reliability of the switching devices in the circuit.
- Circuit Efficiency: It helps to dissipate the stored energy in the inductor smoothly and safely.
Related Components
The DS3815FWAA would be connected in parallel with an inductive load and in a circuit containing a switching device.
- Switching Device: This could be a transistor, MOSFET, or even a simple electromechanical switch or relay that controls the flow of current to the load.
- Inductive Load: The device that creates the voltage spike, such as a relay coil, solenoid, or motor winding.
