| Patent application number | Description | Published |
|---|
| 20090147553 | DC POWER SUPPLY FOR VARYING OUTPUT VOLTAGE ACCORDING TO LOAD CURRENT VARIATION - A direct current (DC) power supply for varying an output voltage according to a load current variation is disclosed. The DC power supply includes an alternating current(AC)/DC conversion unit converting commercial AC power into DC power, a DC/DC conversion unit converting a voltage level of the DC power and outputting output power, and a control unit controlling conversion of the voltage level of the fed-back DC power according to a variation in a load current of the output power from the DC/DC conversion unit. | 06-11-2009 |
| 20090167474 | TRANSFORMER IMPROVED IN LEAKAGE INDUCTANCE - There is provided a transformer improved in leakage inductance including: a core having first, second and third legs electromagnetically coupled to one another; a primary winding formed of a conductor having one end and another end receiving power from the outside and dividedly wound around the first, second and third legs; and a secondary winding wound around at least one of the first, second and third legs and receiving induced power by electromagnetic induction with the primary winding. | 07-02-2009 |
| 20090237030 | CHARGE EQUALIZATION APPARATUS - The present invention relates to a charge equalization apparatus, which allows the primary and secondary windings of a transformer to be easily fabricated, can control the flow of charge to batteries depending on the charged states of series-connected batteries, and can prevent overcurrent from flowing into a battery currently being charged. | 09-24-2009 |
| 20090302803 | CHARGE EQUALIZATION APPARATUS AND METHOD - The present invention relates, in general, to a battery voltage equalization apparatus and method, and, more particularly, to a charge equalization apparatus and method, which decrease the withstand voltages of semiconductor switching elements while maintaining charge equalization performance, thus making it easy to implement the secondary windings of transformers while reducing the costs of the charge equalization apparatus. The charge equalization apparatus includes N first transformers (T | 12-10-2009 |
| 20090322155 | CHARGE OF EQUALIZATION APPARATUS WITH PARALLEL CONNECTION OF SECONDARY WINDINGS OF MULTIPLE TRANSFORMERS - The present invention relates, in general, to a charge equalization apparatus with series-connected battery cells and, more particularly, to a charge equalization apparatus, in which series-connected battery cells (B | 12-31-2009 |
| 20100007308 | CHARGE EQUALIZATION APPARATUS - The present invention relates to a charge equalization apparatus, which can enable the primary windings and the secondary windings of transformers to be easily manufactured, can control the flow of charges into batteries depending on the charged states of series-connected batteries, and can prevent overcurrent from flowing into batteries that are currently being charged. | 01-14-2010 |
| 20100148726 | CHARGE EQUALIZATION APPARATUS - The present invention relates to a charge equalization apparatus, in which series-connected batteries are divided into modules having certain sizes, and intra-module charge equalization and inter-module charge equalization are simultaneously performed, thus improving charge equalization performance and reducing the circuit size. | 06-17-2010 |
| 20100207578 | Automatic Charge Equalization Method and Apparatus for Series Connected Battery String - The present invention relates to an automatic charge equalization apparatus and method having an automatic PWM generating means for a series-connected battery string. The automatic charge equalization method and apparatus for a series-connected battery string according to the present invention can improve charge equalization by accomplishing charge equalization operation after comparing the potential of the corresponding battery cell with the average potential of the plurality of battery cells including the corresponding battery cell upon charging or discharging the corresponding battery cell. | 08-19-2010 |
| 20100283433 | CHARGE EQUALIZATION APPARATUS WITH PARALLEL CONNECTION OF PRIMARY WINDINGS OF MULTIPLE TRANSFORMERS - The present invention relates, in general, to a charge equalization apparatus for batteries and, more particularly, to a charge equalization apparatus, in which the primary windings (M | 11-11-2010 |
| 20110032062 | TRANSFORMER IMPROVED IN LEAKAGE INDUCTANCE - There is provided a transformer improved in leakage inductance including: a core having first, second and third legs electromagnetically coupled to one another; a primary winding formed of a conductor having one end and another end receiving power from the outside and dividedly wound around the first, second and third legs; and a secondary winding wound around at least one of the first, second and third legs and receiving induced power by electromagnetic induction with the primary winding. | 02-10-2011 |
| 20110050379 | PLANAR TRANSFORMER - There is provided a planar transformer having a dual-bobbin structure. The planar transformer includes a core unit including a pair of cores that are electromagnetically coupled to each other, and a bobbin unit including an inner bobbin part and a board part. The inner bobbin part includes a bobbin body having a predetermined volume and having a through hole into which the core is inserted, and a first winding wound around an outer circumferential surface of the bobbin body, and the board part includes at least one board including a board body having a predetermined surface area and having a through hole into which the inner bobbin part and the core are inserted, and a second winding formed on at least one surface of the board body and causing electromagnetic action with the first winding. | 03-03-2011 |
