Upgrading Your DC Electric Power Rectifiers Control

Upgrading Your DC Electric Power Rectifiers Control

Upgrading Your DC Electric Power Rectifiers Control

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TM Drive-DC FCR Product Guide

Increase your DC power Bridge Rectifiers system’s life, and obtain a higher performance, friendly diagnostic tools and wide LAN communication options using digital control at low cost.>

Digital Controls

The FCR (Firing Circuit Replacement) is a TMEIC GE microprocessor-based process controller with dedicated I/O system, designed to be the controller of medium to large complexity SCR (Thyristor) bridges where the need for advanced control requirements, high speed response, expanded diagnostic capability and various interfaces are beyond the capability of conventional analog control.

Firing Commands, Fast As Light

The fiber optic technology is a great advantage of the FCR, where the gating commands do not have any lag on the sequence and response. Using Electric-Light conversion technology with FOT (Fiber Optic Transmission Board), the firings are sent to a Light-Electric inversion board.

The firing pulses are sent to the Light-Electric transmission board, which allows the FCR to control multiple bridge converters in 6 and 12 pulse configuration using 1 CPU and up to 24 pulse configuration using 2 CPU’s.

Each fiber optic firing board has its healthy signals in benefit of maintenance and diagnose. Fiber optic is also immune to electromagnetic interference, a very important feature while working in high current applications.

Diagnostic Tools

The GE Control System Toolbox is a Windows®-based operator interface program used to configure, tune, and monitor FCRís. Its user-friendly interface by using diagrams to view signal flow, sequencing, and regulator control in the FCR, which helps the operator in all levels of setup and operation with password security levels for protecting the configuration.

Regulation and sequencing is driven by a set of parameters which can be edited/monitored using any of three operator-selected methods:

  • Functionally organized menus block diagrams that detail the regulators and sequencing function.
  • Wizards that guide the user through a complete drive configuration and tune-ups.
  • The drive control window which allows the user to control the system from the toolbox, having the look and feel of the drive diagnostic Interface.

Trend Recorder

The trend recorder monitors and graphs signal values from toolbox and graphs data collection analysis (.dca) files. Data can also be saved and exported for other applications, such as spreadsheets like Microsoft Excel.

This application is configured using drag-and-drop to move a variable from the block diagram view to the trend recorder window which has an intuitive VCR-style interface for data record and playback. Live data can be sampled and viewed as fast as 20 ms.

It uses three methods to collect data:

Real Time

Mode is for low-to-medium-data collection rates, typically used for live monitoring.

Capture Buffer

Using the trace back data feature which trends several preset variables at high speed, during fault events and save them on non volatile memory for its post-analysis.

Data Historian

mode for historical data contained *.Dca files. a given trend can display one or multiple data historian files using an innovation series controller, and a personal computer (pc). The program runs in the background as a service on the pc that is running the windows nt operating

system and records the values of any egd or srtp signal on any ethernet connected to the pc on which the program is running.

Trace Back Data

If you experience a fault on FCR equipment, Toolbox allows you to view Fault History and Traceback Data. This feature is capable to collect up to 8 events, and several selected variables at speeds up to 244 us storing the event on non volatile memory, remaining even while powering down the equipment. It also eliminates the need of using an oscilloscope during the failure solution, because it is able to display the information of these variables in a trend recorder window.

Remote Diagnostic Support

AMI GE offers the remote support option, where the distance monitoring is possible using either an internet connection, or telephone links to control the installed equipments through the maintenance pc and customers network. This feature reduces the time of diagnose and usually the equipments are put back in service faster.

Adaptability

FCR is 100% compatible with the Canadian General Electric Indoor DC rectifier, and matches with several DC power bridges where AMI GE offers different options of replacement depending on the application and customer needs. The FCR is provided with fast connectors (same as existing) to reduce transition time between existing and new system. Control/fiber optic transmission/fiber optic reception/ gating commands conditioning (partial or complete replacement of gate drive panel).

FCR Upgrade for Electric Power Circuit

The Bridge Rectifiers supplied before the 80’s use old-fashion analog technology, which used to be reliable, but nowadays productivity and quality requirements on manufacturing processes require an urgent upgrade, to keep being competitive on the market

Upgrade could become expensive regarding equipment, and installation requirements, but the replacement can be selective, reusing the existing power rectifiers and devices in good conditions which most of the time, represents the biggest part of the investment cost.

Motors generally can also be reused, unless the new control scheme requires higher torque or speed.

The FCR is an AMI GE product, offered to solve the needs of upgrade, which otherwise, would represent a huge and sometimes, not really needed big investment. The FCR is designed to substitute analog gating control of SCR is with new digital circuitry, obtaining with it, ultimate generation diagnostic tools.

Depending on the system, the FCR can be complemented with a master control for processes, Interlocks and additional I/O either with a PLC or ISC (Innovation Series Controller) and user friendly HMI or COI (Control Operator Interface) screens.

Theresa Lee

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