GE IS200BICLH1B Bridge Interface Card

الوصف

The GE IS200BICLH1B is a highly specialized Printed Circuit Board (PCB) known as the IGBT Drive/Source Bridge Interface Board (¹$\text{BICL}$).² It is a vital component in General Electric’s Drive Control Series, which is integrated with the Mark VI Speedtronic Turbine Control System.³

Its primary function is to act as the critical communication and protection bridge between the main, low-voltage control processor and the high-power IGBTs (Insulated Gate Bipolar Transistors) in large industrial motor drives or power converters.⁴

⚙️ Core Functionality and Features

The $\text{BICL}$ board ensures the accurate, high-speed control and thermal protection of the drive’s power stack. The H1B revision indicates a specific functional update over the prior H1A revision, making it preferable in certain applications.⁵

Key Functions and Protection:

• Interface Bridge: It provides the communication link between the drive’s main control board and the specialized Bridge Personality Interface Boards (⁶$\text{BPIA}$, ⁷$\text{BPIB}$, or ⁸$\text{SCNV}$) that manage the power semiconductor switches.⁹
• Protection and Monitoring: It integrates crucial protective and monitoring functions:¹⁰
  • Temperature Monitoring: It features four RTD (Resistance Temperature Detector) inputs for monitoring both bridge temperature and ambient temperature to prevent overheating.¹¹
  • Fault String Monitoring: It includes two dedicated fault string inputs (¹²$\text{LOCFLT}$ and ¹³$\text{SYSFLT}$) that monitor interlock contacts.¹⁴ Breaking a fault string initiates a controlled shutdown by disabling bridge firing and dropping out the main contactors ($\text{MA}$ and $\text{MB}$).
  • Watchdog Circuit: A dedicated watchdog monitors the $\text{20 Mhz}$ clock signal to the board’s internal control logic, removing power to the IGBT drivers within 30 microseconds if the clock fails while firing.
• Contactor Control: It controls the main contactor pilot relays ($\text{MA}$ and $\text{MB}$). It also includes an MA Sense Input (¹⁵$\text{24-115 V ac/dc}$) to monitor the main contactor interlock, preventing bridge firing if the contactor doesn’t pick up when commanded.¹⁶
• Auxiliary Control: Includes a PWM (Pulse Width Modulated) Fan Speed Output to dynamically control cooling fans based on measured temperatures.¹⁷

🛠️ Technical Details and Installation

The IS200BICLH1B is a VME-style board designed to be installed in a specific slot within the control rack.¹⁸