IS200PSCDG1ADB - PWM Power Supply / Contractor Driver Board

SPECIFICATIONS:

Part Number: IS200PSCDG1ADB
Manufacturer: General Electric
Series: EX2000
Microprocessor: Intel Celeron 300 MHz
Memory: 32 MB DRAM
Operating system: QNX
Programming: Boolean
Product Type: PWM Power Supply / Contractor Driver Board
Secondary Ethernet Interface: 10BaseT/100BaseTX
Max load Current: 125 V dc
Voltage Range: 14 to 32 V dc
Maximum Lead Resistance: 15 Ω
Storage temperature: -40 to 80° C
Operating temperature: 0 to 70° C
Technology: Surface mount
Size: 16.2 cm high x 8.6 cm
Repair: 3-7 Day
Availability: In Stock
Weight: 2 lbs
Country of Origin: United States
Manual: GEI-100241

FUNCTIONAL DESCRIPTION:

IS200PSCDG1ADB is a PWM Power Supply / Contractor Driver Board manufactured and designed by General Electric as part of the EX2000 Series used in GE Excitation Control Systems. The Power Supply and Contactor Driver board (PSCD) is powered from the dc link through stab-on terminals DCPL1 (+) and DCPL2 (-). The control operates from 80 - 400 V dc as nominal range inputs. Transient operation to 600 V dc is possible during maximum operation of the dynamic discharge. This board produces control power for distribution to the other control module boards.

The main supply produces ±24 V, ±15 V, and +5 V for control boards (LDCC and TCCB) A 17.7 V ac squarewave is distributed through high frequency transformers to the gate driver and LTB inputs power supplies. Auxiliary to the main supply is supplies for generating isolated 70 V dc (sufficient to power 13 LUP inputs ) and an isolated SHVI/SHVM power for future applications. The contactor control power supply from the PSCD board is sized to deliver up to 0.75 A dc. Power is taken directly from the dc link and converted to 105 V dc by a buck converter. The enable of the MDA contactor is through an optically coupled signal, which is logically in parallel with the coil of K1. Relay K1 is driven from the LDCC board when the control is commanded to run. Relay K86 is used as the control permissive to run an emergency stop. Dropping out K86 will immediately stop the regulator. The coil voltage is from the 70 V dc power supply on the PSCD board.

INPUT/OUTPUT PLUG CONNECTORS:

• Connector PPL connects to the PSCD board which provides high frequency control power to the GDDD board. See Figure 1 for the location of this connector and Table 2 for the values of the pins.

• Connector MDPL connects to the dc contactor coil for control of the contactor. See Figure 1 for the. location of this connector for the values of the pins.

• Connector SQPL ( optional ) connects to the optional SHVM or SHVI board for power distribution to the voltage-controlled oscillators. See Figure 1 for the location of this connector and Table 6 for the values of the pins.

• Connector 2PL connects to the LDCC and TCCB boards and provides power distribution to those boards. See Figure 1 for the location of this connector and Table 3 for the values of the pins.

• Connector 4PL connects to the 3TB/NTB board for power distribution to the “control on” input and auxiliary contacts. See Figure 1 for the location of this connector and Table 7 for the values of the pins.

• Connector 70PL connects to the 2TB terminal board for distribution of the 70 V dc power and 86 device control. See Figure 1 for the location of this connector and Table 5 for the values of the pins.

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FREQUENTLY ASKED QUESTIONS:

What is the function of a PWM Power Supply in a Contactor Driver Board?

A PWM Power Supply regulates and controls the power delivered to the contactor by modulating the duty cycle of the input voltage. This ensures efficient energy conversion, reducing power loss and heat generation while maintaining a stable output. The PWM technique allows precise control over the power supplied to the load, improving overall efficiency and extending the lifespan of the components.

How does PWM control affect the operation of the contactor?

PWM control enables the contactor to operate efficiently by adjusting the voltage and current supplied to its coil. Instead of continuously applying full voltage, PWM reduces unnecessary power consumption by lowering the duty cycle after initial activation. This not only minimizes coil heating but also improves energy efficiency and reduces the risk of premature contactor failure due to overheating.

What is the typical operating voltage range of a PWM Contactor Driver Board?

The operating voltage range depends on the design and application of the board. Common voltage levels include 12V, 24V, and 48V DC, with some models capable of handling higher voltages up to 110V or 230V AC when equipped with rectification circuits. It is important to check the specifications to ensure compatibility with the intended power source.

What is the typical switching frequency of a PWM Power Supply in a Contactor Driver Board?

The switching frequency of a PWM Power Supply generally ranges between 10 kHz and 100 kHz, depending on the application. A higher switching frequency can reduce the size of inductive and capacitive components but may introduce switching losses and EMI (electromagnetic interference). The optimal frequency is selected based on efficiency, thermal considerations, and noise reduction requirements.