IS200GDDDG1A - Gate Driver and Dynamic Discharge Board

SPECIFICATIONS:

Part Number: IS200GDDDG1A
Manufacturer: General Electric
Series: EX2000
Product Type: Gate Driver and Dynamic Discharge Board
Power Supply Voltage: 24 V dc
Power Consumption: 10-20W
Overcurrent Protection: 1.5A to 5A
Gate Drive Voltage: Typically 15V
Supply Voltage Range: 20V to 30V DC
Operating Temperature: -40°C to +85°C
Dimensions: 17.8 cm wide x 33.02 cm
Availability: In Stock
Product of Origin: U.S.A
Manual: GEI - 100241

FUNCTIONAL DESCRIPTION:

IS200GDDDG1A is a Gate Driver and Dynamic Discharge Board manufactured and designed by General Electric as part of the EX2000 series used in excitation control systems. The IS200GDDD Gate Driver and Dynamic Discharge board provide the interface isolation between the IGBTs and the main processor firing circuits of the EX2000 PWM-based exciter. Dynamic discharge circuit control is implemented on the GDDD board as well as the gating circuits for the A-leg and B-leg active IGBTs. The board also provides the instrumentation of the EX2000 PWM. Output dc voltage, dc-link voltage, shunt current mv input, and the heat sink thermistor input are processed on the GDDD board and sent to the LDCC processors for use by the regulators.

JUMPERS:

• JP1 jumper configures the input level of the dc output voltage to the GDDD board inputs APL-6 and BPL-5. It must agree with the value in EE.612 (VDCMAX).

• JP2 jumper configures the input level of the dc link voltage to the GDDD board inputs CPL-12 and CPL-2. It must agree with the value in EE. 612 (VDCMAX).

• JP3 jumper configures the input level of the dc dynamic discharge reference to the GDDD board on inputs CPL-12 and CPLCOM. It should correspond to the level in EE.612(VDCMAX) such that for EE.612 = 604, JP.3 = 500, and EE.612 = 360, JP.3 = 300.

LEDS:

• LED “Bridge OK”, DS100 on the GDDD board indicates that there are no IGBT leg faults and no overcurrent detected.

• LED “IMOK”, DS101 on the GDDD board indicates that there are no bridge faults, the unit is not in a reset condition, the power supply voltages are OK and there are no dynamic discharge faults detected.

• LED “DD AUX POWER AVAILABLE”, DS102 indicates that the auxiliary power for the dynamic discharge circuit is available from the dc link source via the RDS connection.

PLUG CONNECTORS:

• Connector PPL connects to the PSCD board which provides ac control power to the GDDD board. See Figure 1 for the location of this connector and Table 4 for the values of the pins.

• Connector APL connects to the IGBT Snubber Board (IAXS) for IGBT Leg A control. See Figure 1 for the location of this connector and Table 5 for the values of the pins.

• Connector BPL connects to the IAXS board for IGBT Leg B control. See Figure 1 for the location of this connector and Table 6 for the values of the pins.

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FREQUENTLY ASKED QUESTIONS:

How many test points are available within the assembly, and what do they monitor?

There are eight test points available within the assembly, each serving a unique monitoring function. These test points include analog signals proportional to PWM output voltage and current, DC link voltage, as well as specific signals related to dynamic discharge operations and PWM bridge DC output voltage.

How can technicians use analog TP1 and TP2 to assess the performance of the PWM bridge?

Analog TP1 provides a voltage signal proportional to the PWM output voltage, while Analog TP2 offers a signal proportional to the output current of the PWM bridge. Technicians can use these test points to monitor and analyze the voltage and current levels, aiding in performance optimization and fault detection of the PWM bridge.

How do TP7 and TP8 provide access to the PWM bridge DC output voltage?

TP7 and TP8, when combined, offer access to the PWM bridge DC output voltage. Technicians can use these test points to monitor the voltage output accurately, enabling comprehensive analysis and troubleshooting of voltage-related issues within the system.

Why are monitoring dynamic discharge commands and feedback values important?

Monitoring dynamic discharge command and feedback values (TP5 and TP6) allows technicians to assess the effectiveness of dynamic discharge operations. By comparing these values, operators can ensure proper control over discharge processes, enhancing system performance and safety.