Core Functional Overview

IGBT Gate Drive Control for excitation bridge operation

DC Bus Dynamic Discharge Control to protect power components

Bridge Monitoring: Voltage, current, temperature, and IGBT status

Relay Control: K3 charging relay and K41 de-excitation relay management

Adaptation & Redundancy Configuration

Single Mode:

Single ERBP backplane with one control board

Redundant Mode:

ERBP + ERRB dual boards

Operates in conjunction with ERRR redundant relay board

Supports seamless transition between operating modes

Power Supply & Isolation

Supply Sources:

24 VDC from EPSM

Redundant DC busbar supply

Isolation: Control-side to power-side isolation ≥ 1000 VDC

EMC Compliance: Meets industrial electromagnetic compatibility standards

Physical Specifications

Form Factor: Single slot, double height (6U)

Backplane Interface: P1 / P2 connectors

Rack Compatibility: EX2100 control rack

Weight: Approx. 0.36 kg

Operating Environment

Temperature: –20 °C to +60 °C

Humidity: 5%–95% (non-condensing)

Designed to withstand vibration and shock typical of generator excitation systems

Protection & Diagnostic Functions

DC bus overvoltage dynamic discharge protection

IGBT desaturation detection and protection

Overcurrent and overtemperature shutdown

Fault alarm signaling and operational status indication

Core Functions & Advantages
Precise IGBT Gate Drive

Receives control commands from the ERIO interface to generate accurate IGBT gate pulses, enabling precise regulation of excitation current and meeting the dynamic performance requirements of generator excitation control.

Fast DC Bus Dynamic Discharge

Automatically triggers the discharge circuit during DC bus overvoltage conditions, rapidly dissipating excess energy to protect IGBTs, DC capacitors, and the power bridge, enhancing system safety and reliability.

Comprehensive Bridge Monitoring

Continuously monitors DC bus voltage, output shunt current, field voltage, bridge temperature, and IGBT gate status. Closed-loop feedback enables optimized control, fault detection, and predictive maintenance.

Redundant Coordination & Bumpless Transfer

In redundant configurations, the dual control boards operate in an interlocked manner and coordinate with the ERRR relay board to control K3 charging and K41 de-excitation relays, supporting bumpless switchover and high system availability.