Converters for battery charging

Recharger converters are designated for conversion of AC to controlled DC for the purposes of rechargeable batteries charging.

General characteristics

  • rated currents: from 10 A to 200 A;
  • rated voltages: from 30 V to 260 V;
  • nominal operating mode – continuous.


  • charging batteries with a nominal voltage of 220 V, 110 V, 60 V;
  • operation in parallel with on-load batteries;
  • load power supply without battery;
  • work in the modes – “Charging” / “Milking”.

Operating pronciple

The converters ensure adjustable regulation of output voltage from 5% to 110% of nominal voltage.

The output current tolerance of the rectifier in the output current regulation mode is not exceeding ± 1% of the value. Output voltage ripple factor during operation with active load and additional filter is not exceeding 5%.

Scope of equipment

The converter consists of the following functional systems:

  • power unit;
  • protection system;
  • alarm, display and control system.

The power unit consists of switching equipment, input transformer which secondary windings have two different voltage taps, a rectifying silicon-controlled bridge, LC-filter. The power to the rectifier is supply by AC mains with 380V voltage, 50Hz frequency. The silicon-controlled bridge is made as per a 6-pulse rectification circuit on SCR cubicles. The type of silicon-controlled bridge cooling is air natural cooling.

Control system

The microprocessor control system of the rectifier provides for:

  • setup of the necessary operation mode, parameters, etc. via buttons on the console terminal;
  • handling of input analogue and discrete signals and pulse generation for control of the rectifier power keys, as well as generation of a number of signals such as dry contact for protection and indication circuits of the Customer;
  • automated on-load voltage supply during start-up, operation and shutdown of the rectifier in accordance with the specified parameters;
  • CAN serial communication with a higher-level system.

All tasks of the control system are fulfilled through software/hardware implementation.

Protection system

The rectifier provides for a number of protections disabling the rectifier in emergency situations both on-load and in the rectifier:

  • internal and external short circuits protection ;
  • protection against a short circuit in the power transformer;
  • charging rate collapse protection;
  • maximum permissible output voltage protection;
  • power thyristors overheating protection;
  • battery misconnection protection;
  • protection against input voltage incorrect phase sequence;
  • protection in case of input power voltage slump or outage, as well as rectifier reclosing upon the network recovery;
  • a number of protections for monitoring CS individual elements states;
  • protection against faults in the rectifier power supply system.

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