SWITCHING TYPE CHARGER

• Main Author: CHAE, HO BYUNG
• Format: Patent
• Language: English
• Published: 14.03.2007
• Subjects: CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION; SYSTEMS FOR STORING ELECTRIC ENERGY

A switching type charger is provided to improve a life span of a charger by providing a constant current irrespective of a change of an input voltage. A microcomputer controls various signals inputted from a power input terminal by a predetermined program, and controls the whole apparatus by outputting the controlled signal to each output terminal. An open-phase checking unit checks whether one phase of three-phase AC voltage inputted from the power input terminal is opened. An over-current detection unit detects an over-load and an over-current according to a control signal of the microcomputer. A temperature detection unit detects an overheated temperature of a radiation plate. An emergency detection unit stops an operation of the microcomputer in an emergency state. A current detection unit detects whether a charge current exists within predetermined maximum and minimum ranges. A voltage detection unit detects a voltage of the output terminal. An equalizing charge unit maintains a predetermined constant voltage and provides a current for a predetermined time during charge. A relay driving unit controls the driving of a relay by the control signal of the microcomputer. A charge unit charges a current, and a voltage by a driving signal output from a pulse width modulation driving output unit. A display unit displays an error by the control signal of the microcomputer.