GE Mark V Series DS200IIBDG1A IGBT Gate Driver Boards

The DS200IIBDG1A is an IGBT gate driver board manufactured by General Electric as part of the Mark V series used in gas turbine control management systems.

The IIBD includes six optically isolated IGBT gate driver circuits, one each for the upper and lower IGBTs for each output phase.

The board also includes current, voltage and fault feedback circuits for each output phase.

An internal power supply on the IIBD board provides the voltage required for the IGBT gate circuits and the shunt feedback voltage control oscillator VCO.

The power supply includes isolation transformers for each output phase The IIBD board includes two independent isolated IGBT gate drive circuits for each output phase.

Each gate circuit consists of an optically isolated gate driver module and discrete components.

DS200IIBDG1A Functional Description

It has three main functions for the driver.

Isolated current feedback

Isolates motor terminal voltage

Protection of power supply Insulated gate bipolar transistor gate drive

DS200IIBDG1A Board Replacement

The board is mounted in the drive's printed circuit board cabinet. Since the cabinet contains multiple boards and multiple cables routed throughout the cabinet, it is critical to follow some basic guidelines to prevent board damage.

When inserting or removing boards, avoid touching other boards in the cabinet and breaking components.

In some cases, you may need to remove a board to access a board that needs to be replaced.

Install the board back in the same position it was in when you removed it. Then reconnect all cables.

The board has multiple connectors and you must ensure that the cables are connected to the same connectors when installing the replacement board.

To reconnect them to the same connectors, inspect the defective boards and make a note of the connector identifier that indicates the connector to which the cables have been connected.

Then, make labels and attach them to the cables to indicate where the devices should be connected on the new board.

The board contains a 32-pin ribbon cable connector, and you must consider how the ribbon cable will be disconnected and reconnected during the replacement process.

If any of the thin wires are cut, the signal it carries will not be sent to or received by the board.

Two tabs on either side of the ribbon cable hold the connector in place.

To remove the ribbon cable, grasp the connector on both sides while releasing the two tabs. Then, remove the connector from the board.

In addition, the board contains one or more jumpers that configure the board to handle drive data in a particular way.

Other jumpers are set at the factory for testing purposes only. The board's documentation identifies the jumpers and describes the jumper settings and how they affect the board's behaviour.

Features

The board has 9 LEDs that indicate the processing status of the board. When lit, the LEDs are visible from inside the board cabinet and are coloured red.

When the board is powered up and the drivers are switched on, the LEDs indicate that the board is running.

Because the LEDs are only visible when the board is powered on, use extreme caution when opening the cabinet.

When viewing the LEDs, avoid touching any components in the drive and avoid dropping any metal, dirt, or other debris into the drive.

When lit, the LEDs are visible from inside the circuit board cabinet and are coloured red.

Precautions for Use

It is standard practice to use hazardous voltages during power-on testing, along with the following precautions.

Use only insulated current probes and isolated voltage detection

Do not probe around the board

Use only instruments rated for high volume tages present on the output terminals

Do not float on oscilloscope