With more than 30.000 high-quality spare parts, they can be sold immediately. Our large inventory allows us to quickly meet customer needs, thereby reducing downtime and protecting production schedules. Our timely delivery time provides you with security and save money.
The DCF803-0035 is an external field exciter converter for industrial DC drive systems. As a core expansion subsystem of ABB DCS800 and DCS880 industrial DC speed controllers, this module functions specifically to control the field windings of medium to large DC motors.
Direct DSL link connection to main armature converter control board
The DCF803-0035, alongside the DCF803-0016 and FEX-425-Int, operates as a high-performance, half-controlled 3-phase thyristor converter (field exciter). All field exciters within this platform are built upon the same SDCS-FEX-4 core control board.
This board is natively equipped with its own independent synchronization processor and closed-loop current control loops, delivering highly dynamic and precise excitation field regulation. The internal current measurement circuit feature an intelligent adaptive design, which automatically scales itself depending on the rated field current of the connected motor.
During operation, the field exciter is fully controlled and monitored in real-time by the primary armature converter via high-speed drive-to-drive communication, ensuring flawless coordination and safety interlocking.
The field exciter is engineered with outstanding field flexibility, prepared to operate as a standard 3-phase converter as well as a single-phase converter. For single-phase installations, the conversion can be physically executed by simply jumpering and connecting the power supply feed to terminals U and W.
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description.
ABB DCF803-0035 Field exciter Manuals, Datasheets, Drivers, Link
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description.
Mining & Extraction Industry
Controls the field excitation of main DC motors in deep shaft mine hoists (winches), ensuring smooth heavy-load starting and precise stopping.
Pulp & Paper Industry
Controls the field weakening speed regulation of DC motors in the drying and pressing sections of multi-motor synchronous paper machine drives.
Rubber & Tire Industry
Used for the field control of main motors in large rubber internal and open mixers to handle sudden heavy load fluctuations during compounding.
Plastics Processing Industry
Drives high-power plastic extruders and calenders, ensuring ultra-stable screw speed during high-pressure continuous extrusion.
Chemical & Petrochemical Industry
Drives large reciprocating gas compressors or specialized explosion-proof DC pumps, providing constant torque characteristics and stable low-speed operation.
Non-Ferrous Metallurgy Industry
Drives continuous rolling mills and drawing machines for copper and aluminum strips, providing precise field forcing under varying loads.
First, ensure total power isolation through LOTO protocols before any intervention, and remember that when configuring the module for single-phase operation, the input power feed must be precisely connected to terminals U and W.
Second, although the onboard SDCS-FEX-4 control board feature automatic current loop scaling, the module remains completely dependent on the primary armature converter via high-speed Drive-to-Drive links during operation, meaning robust communication shielding is mandatory to prevent link dropouts that could trigger a hazardous motor overspeed runaway from a field loss fault.
Third, because the 35A thyristor-based system generates substantial heat, optimal vertical convection cooling must be maintained inside the cabinet, and routine maintenance must include clearing dust from ventilation paths to prevent conductive metallic particulates or high humidity from causing false triggering in the synchronization circuits.
The DCF803-0035 is an external field exciter converter specifically engineered for ABB DCS800 and DCS880 industrial DC drive series. It is dedicated to providing high-performance, precision field current control for medium to large-sized DC motors, ensuring highly efficient and stable motor operation in both the constant torque region (below base speed) and the field weakening region (above base speed).
DCF803-0035 is an industrial-grade, high-power DC motor field exciter (converter) manufactured by ABB. With a rated output current of 35A, it is primarily used to provide a precise DC power supply to the field windings of DC motors.
How to use a product like DCF803-0035?
Install the module inside the control cabinet of a DC drive system. Connect the input to an AC power supply and the output to the motor's field winding. Then, link it to the primary armature converter via high-speed Drive-to-Drive communication to achieve fully automated and intelligent field excitation control.
What is the core main circuit architecture of DCF803-0035?
It utilizes a half-controlled 3-phase thyristor (SCR) bridge rectifier circuit architecture, combining highly efficient power conversion with precise current regulation response.
What internal control board is used in DCF803-0035?
The module is built upon the standard ABB SDCS-FEX-4 core control board, which natively integrates its own independent synchronization processor and closed-loop current control loops.
How does DCF803-0035 adapt to the rated field currents of different motors?
It features a built-in intelligent current measurement circuit that automatically scales and adaptively calibrates the sampling range based on the rated field current parameters of the connected motor.
Trusted by 5,000+ plants worldwide | Backed by our vast inventory of top-tier control parts, modules and cards, fast shipments are dispatched to cover your urgent needs. ABOUT US >>
Disclaimer: We are not an authorized distributor or distributor of the product manufacturer of this website, The product may have older date codes or be an older series than that available direct from the factory or authorized dealers. Because our company is not an authorized distributor of this product, the Original Manufacturer`s warranty does not apply.While many DCS PLC products will have firmware already installed, Our company makes no representation as to whether a DSC PLC product will or will not have firmware and, if it does have firmware, whether the firmware is the revision level that you need for your application. Our company also makes no representations as to your ability or right to download or otherwise obtain firmware for the product from our company, its distributors, or any other source. Our company also makes no representations as to your right to install any such firmware on the product. Our company will not obtain or supply firmware on your behalf. It is your obligation to comply with the terms of any End-User License Agreement or similar document related to obtaining or installing firmware.
Videos
News
Applications
