A.C. & D.C. Drives
Complete d.c.thyristor electric drives
Application
Adjustment of the following parameters of electric drives: speed, EMF, position, tension, output ower.
Used in
Electric drives of rolling mills, coilers, uncoilers, shears, paper – making and hoisting machines, mine and power mechanisms.
Components:
Complete thyristor converter set:
- thyristor converter;
- converter transformer, or line reactors;
- smoothing reactor in d.c. circuit;
- dynamic braking device;
- lead – in facility (cabinet of supply lead – in);
- line contactor;
- exciter.
Motor
Load – break switch
Delivery set and list of services are defined more precisely at concluding the contract.
Used in the thyristor converter:
- microprocessor control based on system "Simoreg DC Master or Sinamics DC Master" of Siemens company;
- transformers, reactors, thyristors, fuses, switchgear apparatus of the leading world manufacturing companies.
Main specifications
| Parameter name | Value |
|---|---|
Rated output current of converter, A:
|
|
| Rated output voltage of converter, V | 220 ÷ 1100 |
| Range of voltage variation in forward and reverse groups of converter, % | 0 ÷ 100 |
| Cooling of thyristors |
|
| Rectification circuit | bridge |
| Pulse number in rectification circuit | 6 (12 for currents 6,3 kA and above) |
| 50 Hz a.c. supply voltage of control circuit, V | 380 |
| Protection degree | IP21 ÷ IP54 |
* For currents up to and including 1000A.
D.C. Drive provides for:
- minimization of size and price of the converter control system as a whole;
- digital control system with standard double – circuit, double – zone structure;
- possibility of adjusting a great number of system parameters without optional extras, directly at the plant under service;
- advanced diagnostics system;
- availability of interface for realizing multi – level control systems.
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