Description
ABB 3AUA0000019968
I. Basic Information
Model: 3AUA0000019968Brand & Origin: ABB (Switzerland)
Product Profile
Original main control drive board / power trigger board exclusively for ABB frequency converters. Compatible with full range of ABB low-voltage high-power frequency converters and industrial drive equipment. It serves as the core board responsible for inverter drive, IGBT triggering, current sampling and fault detection of frequency converters. Mainly used for replacement of aged boards, equipment technical renovation and original spare parts of industrial variable frequency drives, fan & pump variable frequency control systems and production line speed regulation equipment. Widely applied in power, chemical, metallurgical, building materials and other industrial sectors.
Hardware ArchitectureAdopts integrated multi-layer precision industrial PCB design, equipped with IGBT drive trigger circuits, high-precision current sampling loops, auxiliary switching power supply unit, fault detection & latching loops and optocoupler isolation transmission unit. Coated with industrial-grade triple-protection conformal coating, it features fully partitioned isolation layout for strong and weak current circuits, delivering outstanding anti-interference performance and high operational stability to cope with complex long-term industrial conditions.
Mounting Specification
Fixed internal installation inside the frequency converter cabinet, matching the cabinet structure of ABB frequency converters of corresponding power ratings. Fixed by screws and connected via onboard slots for tight fitting and stable contact, suitable for long-term operation in enclosed frequency converter cabinets.
Matching EquipmentCompatible with complete units of standard ABB low-voltage industrial frequency converter series. Cooperates with converter main control boards, power modules, rectifier bridges and heat dissipation systems to drive power loops and feed back signals, supporting the full speed regulation and protection logic of frequency converters.
Product CharacteristicsOriginal factory standardized board design with pre-matched solidified firmware. No secondary parameter commissioning required. Equipped with comprehensive original electrical protection and anti-interference design, complying with EMC electromagnetic compatibility standards for industrial drive equipment.
II. Technical Specifications
1. Drive Output Parameters
Outputs dedicated trigger drive signals for IGBT power tubes with precise timing and fast response, meeting the operating requirements of inverter loops of corresponding power-rated converters. Drive signals are equipped with overcurrent limiting and waveform shaping functions to ensure stable turn-on and turn-off of IGBT modules and prevent false conduction or abnormal shutdown.
2. Sampling & Detection Parameters
Onboard high-precision current sampling circuits collect real-time signals of converter three-phase output current and DC bus current with high sampling accuracy and zero signal drift. It accurately identifies abnormal operating conditions such as overcurrent, phase loss and current unbalance, providing core data support for system overload protection, current-limited speed regulation and fault alarms.
3. Electrical Performance Parameters
Built-in auxiliary switching power supply circuit adapted to internal bus power supply of frequency converters, integrated with surge protection, pulse interference suppression and EMC filter circuits. Multi-stage hardware protection is embedded to support linkage detection of overcurrent, short circuit, undervoltage and overtemperature, with instantaneous fault latching protection to avoid breakdown of power modules. Dielectric withstand voltage isolation between strong and weak circuits meets safety standards of industrial frequency converters, effectively blocking high-voltage pulse interference.
4. Signal Transmission Parameters
High-speed optocoupler isolated signal transmission realizes complete galvanic isolation between main control logic signals and power drive signals to eliminate cross-interference risks between high and low voltage circuits. Features low signal transmission delay and high stability to guarantee the speed regulation response and operational synchronization of frequency converters.
5. Environmental Operating Parameters
Operating Temperature: -20℃ ~ +70℃Storage Temperature: -40℃ ~ +85℃Operating Humidity: 5%~95% RH, non-condensingPowerful electromagnetic interference resistance to withstand high-frequency electromagnetic interference, dust, high humidity and other harsh conditions inside converter cabinets, supporting 24/7 uninterrupted continuous equipment operation.
III. Key Features
1. Precise IGBT Drive Control
Specially adapted to ABB frequency converter power modules, it outputs standard drive timing signals to accurately control IGBT turn-on and turn-off sequences, ensuring stable operation of converter inverter loops, realizing smooth variable frequency speed regulation and stabilized voltage output, and effectively reducing harmonic waves and energy loss during equipment operation.
2. Full-Loop Real-Time Sampling & Monitoring
Collects real-time data of DC bus current and three-phase output current of the converter, and synchronously monitors the operating status of power loops. It accurately identifies faults including phase loss, overload, interphase unbalance and instantaneous short circuit, providing accurate data support for converter protection logic.
3. Multi-Layer Hardware Protection for High Safety
Integrates overcurrent protection, short-circuit protection, undervoltage protection, power device abnormality detection and fault latching functions. Once circuit abnormalities are detected, IGBT drive signals are immediately blocked to implement rapid shutdown protection, preventing burnout or explosion of power modules and greatly improving the operational safety of frequency converters.
4. Optocoupler Isolation Anti-Interference Design
Complete galvanic isolation between main control signals and power drive signals thoroughly eliminates signal disorder and equipment misoperation caused by high-frequency electromagnetic interference and high-voltage pulse crosstalk under variable frequency operating conditions, adapting to complex industrial electromagnetic environments.
5. Commissioning-Free Drop-In Replacement with Strong Compatibility
Original standardized board design with firmware and hardware parameters fully matched to corresponding models. Aged faulty boards can be directly replaced on site without parameter modification or firmware flashing; the equipment can be put into normal operation right after installation, significantly lowering maintenance workload and downtime.
IV. Working Principle
After the frequency converter is powered on, the 3AUA0000019968 board completes voltage stabilization power supply via its internal auxiliary power circuit and enters standby status. It receives PWM speed regulation pulse signals sent by the converter main control board, and outputs precise drive timing signals after optocoupler isolation, signal shaping and amplification to control sequential turn-on and turn-off of IGBT power modules. It completes the inversion conversion from DC bus voltage to three-phase AC variable frequency voltage to realize equipment variable frequency speed regulation.
During operation, the onboard sampling circuit continuously collects operating data such as DC bus current and three-phase output current, and feeds data back to the main control system in real time for logic calculation and speed regulation adjustment. Meanwhile, it monitors the whole operating status of power loops. Once faults such as overload, short circuit, phase loss and voltage abnormality are detected, hardware latching protection is triggered instantly to cut off IGBT drive signals, command the converter to shut down and send alarms, lock fault status, and protect the safety of the complete power loop and matching equipment.
V. Application Scenarios
- Industrial Variable Frequency Speed Regulation System: Core drive component for ABB low-voltage industrial frequency converters, widely used for variable frequency speed control of fans, water pumps, compressors, conveyors and other equipment.
- Power & Energy Industry: Variable frequency control systems for auxiliary power equipment and station service power in thermal power, hydropower and new energy power plants.
- Chemical, Metallurgical & Building Material Heavy Industry: Variable frequency drive control of large units under high-temperature, high-dust and strong-interference working conditions, suitable for continuous industrial production equipment.
- Equipment Renovation & Spare Part Replacement: Original factory exclusive spare parts for replacing aged faulty drive and trigger boards of ABB same-series frequency converters, equipment fault maintenance and system upgrade transformation.
