Al Nakhi Power Transmission Equipment Trading

Dubai, United Arab Emirates

IGBT based battery charger uses the latest state of the art space vector theory with pulse width modulation technology (SVPWM). This reduces the switching losses by limiting the switching to two-thirds of the pulse duty cycle. These chargers are built-in to provide constant DC source by charging the batteries. The charger operates in float charging and boost charging modes as per the limits set according to the characteristics of the battery. Output voltage regulation is achieved by controlling the IGBT. The charger can provide constant voltage power with simultaneous boost charge to the discharged battery. The current can limit from 10% to 90% of the charger output capacity.

Superior Features:

• DSP controlled model that meets the requirements for new generation systems.
• Designed for continuous operation at full rated load.
• Display of system status and fault alarms on a 128 x 64 graphics LCD unit.
• Full galvanic isolation between input & output.
• Overload and short-circuit protection.
• System is best known for its stability, precision (noise immunity), and flexibility (using software).
• Designed for minimal maintenance & remote operation.
• Highly efficient and compact design.
• Predictive control of rectification using DSP control.
• Provided communication ports for local interfacing, potential free contacts for external communication.

Applications :

• Railways.
• Oil & gas.
• Telecom.
• Power utilities.

Thyristor Battery Charger

Thyristor based battery charger uses Thyristor switching principle for achieving the desired DC output. It basically consists of a transformer, a semi-conductor bridge rectifier, a filter circuit and a control circuit.

The AC mains voltage is transformed to a suitable level and fed to the rectifier bridge. After being smoothened by the filter circuit, it rectifies the AC input and feeds controlled DC output to the battery and load. The power output requirement is adjusted by using phase control technique which is provided by the control circuit. The feedback signals from the output to the control circuit are used for maintaining voltage regulation and current limit.

A new innovative model uses 16-bit DSP controller (optional) for switching and control of Thyristor for achieving desired DC output. The charger output voltage, output current, battery current, and battery temperature compensation are controlled by the Digital Signal Processor. The charger output parameters can be set or adjusted through keypad-display provided on the front panel with password protection. It has communication ports for local / remote monitoring of measurements and events.

Superior Features:

• Time tested analog designs for more than three decades.
• DSP controlled model that meets the requirements for new generation systems.
• Extensible range for output voltage and output current.
• Customized panels in CRCA, SS304 & SS316 grade.
• Ingress protection up to IP-65, Nema 4x standards.
• Display of system status and fault alarms on a 128 x 64 graphics LCD unit.
• Customization of display measurements and fault alarms up to 28 parameters.
• Momentary Load Test Facility with data logging for battery health check.
• Up to 11 special function keys in front-panel for user interface.
• MODBUS over RS485.

Applications

• Oil & gas.
• Telecom.
• Power utilities.