Description
1. Product Overview
Part Number: IS200BPIBG1AEB, base part IS200BPIBG1A. Suffix EB indicates finalized PCB revision, transformer parameter calibration and factory full inspection batch. No cross-model hardware compatibility; only identical suffix spares support direct drop-in replacement.
Manufacturer: General ElectricSystem Affiliation: Core signal conditioning and fault interlock VME plug-in card for Speedtronic Mark VI / Mark VIe gas & steam turbine high-power variable-frequency drive control systems, Only factory surplus, refurbished and project redundant spares are available for procurement. It serves as the upper-layer logic core of inverter power units and medium-voltage variable-speed loops.Model Coding Definition
- IS200: Unified prefix for IS200 series VME cards of Mark VI control system;
- BPIB: Abbreviation of Bridge Personality Interface Board;
- G1: 1st generation hardware architecture;
AEB: Final revision of PCB layout, transformer secondary winding parameters and pinout definition.
Product Definition: The central logic board of power inverter units, which receives bridge arm drive commands from VME rack main controller, executes opto-isolation, level conversion and phase-based drive signal distribution. It samples DC link voltage, three-phase bridge output voltage and IGBT gate driver fault signals, generates VCO frequency feedback and uploads to main control. Each phase adopts independent hardware fault latch to prevent shoot-through short-circuit of IGBTs. It integrates command forwarding, status acquisition, fault interlock and feedback transmission as the core interface of high-power inverter units.
2. Six Core Hardware Functional Units
2.1 Isolated Signal Conditioning & Command Distribution Unit
The rear P1 connector receives logic-level drive signals for upper/lower IGBTs of six bridge arms from VME backplane. Dual optocoupler isolation eliminates ground loop interference between main control side and power drive side. Adapted signals are distributed to gate driver boards and shunt feedback boards in three phases to strictly control IGBT turn-on/off timing and avoid shoot-through within one phase.
2.2 DC Link & Phase Voltage VCO Feedback Sampling Unit
It accepts sampled signals of DC link bus voltage and VAB/VBC phase output voltage. Rectification and filtering convert analog voltage into 0~20MHz VCO frequency signals uploaded to main controller for real-time monitoring of overvoltage, undervoltage and three-phase unbalance. For parallel bridge topology, the board averages two VCO signals per phase and triggers fault latch if phase imbalance exceeds 10%.
2.3 Phase-Isolated Fault Latch & Alarm Reporting Unit
Each phase drive circuit is equipped with independent hardware fault latch register. Faults including overcurrent, undervoltage, IGBT breakdown and driver power anomaly detected by gate driver boards are latched on hardware level and cannot be reset by transient noise. If a turn-on command is received with existing latched fault, all drive outputs of the corresponding phase are immediately blocked, and fault phase & type are reported to rack CPU via dedicated bus. Hardware interlock prioritizes software logic to contain fault expansion and component damage.
2.4 Multi-Channel Isolated Auxiliary Power Generation Unit
Three independent industrial transformers are integrated on PCB with primary side fed by 17.7VAC square wave input. Three sets of secondary windings produce isolated power after rectification & filtering: one channel outputs isolated 5VDC (max 500mA) for downstream gate driver boards; another generates 12V isolated supply for VCO oscillation circuits. Logic control power is drawn from 5VDC backplane supply via P1 port. Complete isolation between strong and weak current prevents reverse power feed from power side damaging main control backplane bus.
2.5 Total Bus Overcurrent Shunt Signal Aggregation Unit
It collects instantaneous bus current signals from shunt sampling boards, executes signal scaling and summation calculation. Once hard short-circuit on bus or inter-phase short is detected, all drive outputs are globally blocked instantly to emergency-stop the inverter and protect front-end rectifier modules and DC link capacitors.
2.6 Industrial Reinforced Environmental Adaptation Unit
Double-sided conformal coating against moisture, salt fog and corrosion is applied to gold-plated FR-4 PCB. Electrolytic capacitors and other aging-prone components are eliminated; core circuits adopt wide-temperature industrial ICs, metal film resistors and high-voltage ceramic capacitors. It withstands dust accumulation inside sealed cabinets, long-term low-frequency vibration from turbine bases, coastal high-humidity salt fog and heavy EMI from large inverters for 24/7 maintenance-free continuous operation.
3. Technical Specifications
3.1 Basic Hardware Specifications
| Item | Specification |
|---|---|
| Full Part Number | IS200BPIBG1AEB |
| Card Type | Mark VI VME 6U plug-in BPIB bridge interface board |
| Mounting | Standard 6U VME vertical slot installation with front latch anti-loosening |
| Main Interfaces | Rear P1 VME bus connector, three-phase signal terminals, driver cable ports, AC power input |
| Dimension | Standard 6U VME size: 233.35mm × 160mm |
| Net Weight | Approx. 0.42kg |
3.2 Core Electrical Parameters
- Primary Input Power: 17.7VAC square wave; Logic Supply: 5VDC from backplane
- Output for Driver Boards: Isolated 5VDC, rated 500mA
- VCO Feedback Frequency Range: 0 ~ 20MHz linear voltage-frequency conversion
- Dielectric Withstand Voltage: 2500VAC 1min isolation between main control logic and power drive side
- Controlled Bridge Arms: 3-phase full bridge with upper/lower IGBT drive per phase
- Fault Reset Mechanism: Hardware latched fault, only clearable via system software reset
- Isolation Level: Dual redundant optocoupler isolation per control channel
3.3 Environmental & Compliance Standards
- Operating Temperature: 0℃ ~ +65℃
- Storage & Transport Temperature: -40℃ ~ +85℃
- Humidity: 5%~95%RH non-condensing, no corrosive gas or salt fog deposition
- Ingress Protection: IP20, for installation only inside sealed industrial control cabinets
4. Product Advantages
- Hardware-priority fault protection: Drive output blocking is implemented via pure hardware latch independent of CPU software. Protection remains effective even under system crash or communication loss to prevent catastrophic damage such as IGBT shoot-through and DC link capacitor explosion.
- Three-level isolation architecture: Optocoupler + transformer double isolation between backplane weak current, intermediate signal stage and power strong current stage. Short circuit and surge on power side cannot damage VME rack main control CPU and backplane.
- All-in-one integration of power supply, sampling, drive distribution and fault reporting: Replaces multiple discrete boards to reduce cabinet component count and wiring fault points.
- Dual redundant optocoupler signal transmission: Single optocoupler failure will not cause complete loss of drive signal, improving long-term stability of variable-frequency continuous production units.
- Frequency-based DC link feedback: Analog voltage converted to frequency signal for long-distance transmission with far superior anti-interference performance compared to conventional 4~20mA analog cables.
- Strict model restriction for replacement: IS200BPIBG1A base version cannot substitute AEB revision due to fixed transformer ratio and VCO parameters. Direct replacement requires no modification to unit control logic after installation.
5. Application Scenarios
1. GE 6FA/9FA Gas Turbine Mark VIe Starter Variable-Frequency System
Core control board of soft-start inverter power unit during turbine barring and startup, regulating IGBT drive timing of three-phase inverter bridge, monitoring bus voltage and current, and emergency tripping inverter upon faults to protect power modules.
2. Auxiliary High-Voltage Variable-Frequency Systems of Thermal Power Steam Turbines
Main control interface board for inverter units of forced draft fans, induced draft fans and condensate pumps, realizing closed-loop variable-speed regulation, hardware overcurrent/overvoltage protection and drive status monitoring.
3. Large Reciprocating Compressor Variable-Frequency Drives in Petrochemical Industry
Upper-layer interface master board for inverter cabinets of cracking gas and recycle hydrogen compressors, adapting to dusty, corrosive and high-EMI factory environments to guarantee uninterrupted chemical production.
4. Excitation Power Units of Waste Heat & Captive Power Plant Steam Turbines
Inverter bridge control board for generator excitation systems, adjusting excitation output amplitude and phase for reactive power regulation and grid synchronization, with hardwired short-circuit fast trip protection for excitation loops.
