Constant Current Constant Voltage Half Bridge Resonant Power Supply For Capacitor Charging

Accurate constant current constant voltage 20a power supply ensures safe charging of supercaps and li ion batteries.

Constant current constant voltage half bridge resonant power supply for capacitor charging.

Constant voltage allows the full current of the charger to flow into the battery until the power supply reaches its pre set voltage. Bridge half bridge or push pull excites the resonant network rn with high. The other half of the energy is dissipated as heat in the source and switch resistance. Constant current constant voltage half bridge resonant power supply for capacitor charging june 2006 iee proceedings electric power applications 153 3 343 347.

Overload protection can be achieved by clamping the resonant capacitor voltage to the supply voltage 25 26 using diodes. Topology for application as a constant current power supply 37. Charging a capacitor by switching a dc voltage source means only 1 2 the energy is stored on the capacitor. By joshua caldwell download pdf many applications require a power supply that can accurately regulate a voltage and accurately limit output current but there are remarkably few solutions that can do both with a single ic system designers must typically trade off accuracy in.

A novel high frequency half bridge resonant converter is proposed which is suitable for application as a capacitor charging power supply ccps. The advantages of prc are. A three phase half bridge series resonant inverter as reported in 21 and 22 and 12 switches are required to configure a. A power supply specifically designed for capacitor charging applications that uses a series resonant circuit topology a constant on time variable frequency control scheme and zero current.

The constant voltage charging through a current limiting resis tor method are the charging rate and efficiency 1 5 11. The proposed lcl t resonant converter with clamp diodes is shown to have in built constant current cc constant voltage cv characteristics. A novel high frequency half bridge resonant converter is proposed which is suitable for application as a capacitor charging power supply ccps. The battery can be left connected to the charger until ready for use and will remain at that float voltage trickle charging to compensate for normal battery self discharge.

Therefore the need to sense output current and voltage and their feedback control circuit is eliminated. The current will then taper down to a minimum value once that voltage level is reached. It makes no difference how low the resistance half the energy will be lost. The proposed lcl t resonant converter with clamp diodes is shown to have in built constant current cc constant voltage cv characteristics.