This exciter gate pulse amplifier boosts control signals for GE Mark VIe generator excitation systems. It amplifies low-level PWM outputs into high-current gate drive pulses. Therefore, it enables reliable firing of thyristors in static exciter bridges.
Physical and Amplifier Specifications
The GE IS200EGPAG1B IS200EGPAG1BEC measures 26.0 cm in length and 18.5 cm in width. Moreover, its board weight equals approximately 0.75 kg for rack mounting. A single 64-pin male connector links this board to the VME backplane. Additionally, the board integrates six independent gate pulse amplifier channels.
| Parameter | Specification |
|---|---|
| Brand | General Electric (GE) |
| Full Model | IS200EGPAG1B IS200EGPAG1BEC |
| Category | Exciter Gate Pulse Amplifier |
| Dimensions (L x W) | 26.0 cm x 18.5 cm (10.24″ x 7.28″) |
| Board Weight | 0.75 kg (1.65 lbs) |
| Primary Interface | 1 x 64-pin Male Connector |
| Amplifier Channels | 6 Independent Channels (3 Phase Pairs) |
| Input Signal Type | PWM (0-5 VDC Logic Level) |
| Output Voltage | +15 VDC / -8 VDC (Gate to Emitter) |
| Peak Output Current | 5 A per Channel (Sink and Source) |
| Continuous Output Current | 0.5 A per Channel |
| Switching Frequency | Up to 10 kHz |
| Propagation Delay | < 200 ns (Typical) |
| On-Board Components | 6 Gate Driver ICs + 6 Pulse Transformers + 12 Fast Recovery Diodes + 6 Desaturation Detectors + 1 Temperature Sensor + 8 Protection Diodes |
| Energy Storage | 6 x 100 µF Electrolytic Capacitors (100V) + 3 x 470 µF (35V) + 2 x 10 µF Tantalum (25V) |
| Operating Voltage | +5 VDC, +24 VDC, and Isolated +24 VDC from Backplane |
| Isolation Rating | 3500 Vrms (Input to Output Side per Channel) |
| Protection Features | Desaturation Detection + Undervoltage Lockout (UVLO) + Overtemperature Shutdown |
| Operating Temperature | -20°C to +65°C (-4°F to +149°F) |
| Status Indicators | 6 Green LEDs (Channel Ready) + 6 Yellow LEDs (Pulse Active) + 1 Green LED (Power) + 1 Red LED (Fault) |
Gate Pulse Amplification and Drive Capabilities
The GE IS200EGPAG1B IS200EGPAG1BEC amplifies low-level PWM signals from the exciter controller. Specifically, it converts 0-5 VDC logic inputs into ±15 VDC gate drive pulses. In addition, the amplifier delivers 5 amps peak current for fast thyristor turn-on. Moreover, each channel independently drives high-power thyristors in static exciter bridges. Consequently, this board ensures reliable firing of generator field control thyristors.
Isolation and Protection Features
Each amplifier channel includes a pulse transformer for galvanic isolation. For instance, the 3500 Vrms isolation protects the control backplane from power circuit faults. In addition, desaturation detection monitors thyristor conduction and shuts down on short circuits. Furthermore, undervoltage lockout prevents improper gate drive when supply voltages drop. Thus, the GE IS200EGPAG1B IS200EGPAG1BEC provides safe and reliable thyristor firing in high-power exciters.
Energy Storage and Gate Drive Integrity
This gate pulse amplifier stores energy using eleven onboard capacitors. Specifically, six capacitors filter isolated supplies for each gate driver channel. In addition, three capacitors smooth the main 24 VDC supply for stable amplifier operation. Furthermore, two tantalum capacitors provide high-frequency noise suppression for logic circuits. Therefore, this board maintains clean gate pulse waveforms during transient conditions.
Installation and Diagnostic Indicators
Fourteen LED indicators provide operational status at a glance on this board. First, a green Power LED lights when the backplane supply voltages are present. Second, six green Channel Ready LEDs illuminate when each amplifier channel has valid supplies. Third, six yellow Pulse Active LEDs flash during gate pulse transmission. Finally, a red Fault LED indicates desaturation, UVLO, or overtemperature events. Additionally, the board features six mounting holes for secure rack attachment. Thus, you can monitor gate pulse status instantly without external test equipment.
Details
| Weight | 0.1 kg |
|---|---|
| Dimensions | 25 × 108 × 127 mm |
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