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

It is primarily suitable.

Constant current constant voltage half bridge resonant power supply for capacitor charging. Overload protection can be achieved by clamping the resonant capacitor voltage to the supply voltage 25 26 using diodes. 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 other half of the energy is dissipated as heat in the source and switch resistance.

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. A half bridge converter has been developed with a simple resonant inductor capacitor and an additional switch and obtained zvs operation with 94 5 efficiency at 350w output power in 7. The proposed lcl t resonant converter with clamp diodes is shown to have in built constant current cc constant voltage cv characteristics. 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.

Constant voltage allows the full current of the charger to flow into the battery until the power supply reaches its pre set voltage. Voltage power supply a substantial leakage inductance of the. The current will then taper down to a minimum value once that voltage level is reached. 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 june 2006 iee proceedings electric power applications 153 3 343 347. The constant voltage charging through a current limiting resis tor method are the charging rate and efficiency 1 5 11. A three phase half bridge series resonant inverter as reported in 21 and 22 and 12 switches are required to configure a. A novel high frequency half bridge resonant converter is proposed which is suitable for application as a capacitor charging power supply ccps.

Charging a capacitor by switching a dc voltage source means only 1 2 the energy is stored on the capacitor. It makes no difference how low the resistance half the energy will be lost. 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.