GE DS200SHVMG1AGE SCR High Voltage M-Frame Interface Board

الوصف

The GE DS200SHVMG1AGE is a highly specific, late-revision model of the SCR High Voltage M-Frame Interface Board (SHVM).¹ It’s used in the GE Mark V Speedtronic Turbine Control System and associated DC2000/EX2000 Drive Series.²

The “M” in SHVM is the key designation, indicating it is optimized for M-Frame drives, which typically handle applications with lower DC field voltage ratings compared to the larger drives that utilize the standard SHVI board.

Core Functions of the DS200SHVMG1AGE

This board serves as the essential isolated front-end that translates high-power feedback into a safe, reliable format for the low-voltage control system.

1. Electrical Isolation and Protection 🛡️

• Galvanic Isolation: Provides the mandatory safety barrier, isolating the sensitive control electronics from the dangerous, high-voltage components of the Silicon Controlled Rectifier (³$\text{SCR}$) power bridge.⁴

   

• Voltage Attenuation: Accurately steps down the high ⁵$\text{AC}$ line voltage and ⁶$\text{DC}$ bridge voltage to safe, measurable analog levels suitable for measurement by the control system’s instrumentation circuits (DCFB or SDCI).⁷

   

2. Field Current Feedback Conversion

This function is vital for precise regulator control, often focusing on the motor’s field current:

• Input: It accepts the highly sensitive, low-level $\text{mV}$ signals (typically $\pm 500 \text{ mV}$) generated by the current shunts.
• Conversion to Frequency: It converts these analog signals into a robust differential frequency output (e.g., $0 \text{ to } 500 \text{ kHz}$). Using a frequency signal makes the current feedback highly immune to the intense electrical noise in the drive environment, ensuring reliable data for the main control board.

3. System Interfacing

• Signal Routing: Routes the conditioned feedback signals to the primary control boards, such as the DC Feedback Board (DCFB) or the Power Supply/Instrumentation Card (SDCI).
• Contactor Drivers: Includes the necessary driver circuits for controlling standard and fast contactors within the power section.

Part Number Breakdown (DS200SHVMG1AGE)

The multi-character suffix indicates a history of specific design updates: