Patents
Registration
1. ӵ ġ (Speed Control Apparatus of Motor), Korean Patent 10-0491665, May 18, 2005.
2. Ʈ (Matrix converter and Control Method thereof), Korean Patent 10-1031743, April 20, 2011.
3. ͷ Ǵ dz¹ý ť ̷ ̿ ȯ ý (Control system of Circulating Current in a Wind Power System driven by 3-parallel Back-to-Back Converters using a power theory), Korean Patent 10-1068301, Sep. 21, 2011.
4. ġ (Apparatus for Reducing Harmonic), Korean Patent 10-1070540, Sep. 28, 2011.
5. PWM Ϳ Ŀн ESR ý (Ese Estimation Method Of Electrolytic Capacitor For Pulse Width Modulation Converter And System Thereof), Korean Patent 10-1089937, Nov. 29, 2011.
6. PWM Ϳ Ŀн µ ̿ 뷮 ý (Capacitance Estimation Method Using Temperature Compensation Of Electrolytic Capacitor For Pulse Width Modulation Converter And System Thereof), Korean Patent 10-1103425, Dec. 30, 2011.
7. ºȯġ ġ (Fault Detection Apparatus and Method of Power Conversion Apparatus ), Korean Patent 10-1136181, Apr. 5, 2012.
8. Ʈ ġ ġ (A Fault Detection Method for a Switch Open-circuit in a Sparse Matrix Converter), Korean Patent 10-1207749, Nov. 27, 2012.
9. ܻ 뿬 ι ġ (Apparatus and Method of Controlling Output of a Single Phasegrid Connected Inverter), Korean Patent 10-1213333, Dec. 11, 2012.
10. 3 AC/DC PWM ȸ ġ (Fault-tolerant control apparatus under the open-circuit fault condition of 3-phase AC/DC PWM converter and method thereof), Korean Patent 10-1235183, Feb. 14, 2013.
11. 3 AC/DC PWM ȸ ġ (Diagnosis apparatus of the open-circuit fault in 3-phase AC/DC PWM converter and method thereof), Korean Patent 10-1235182, Feb. 14, 2013.
12. ǽ ι Ī ġ (Apparatus and Method for Fault Diagnosis of Switching Device in Neutral Point Clamped Inverter System), Korean Patent 10-1242250, Mar. 3, 2013.
13. Уף м Ǻ Ǻ ġ (Method and Apparatus for Detecting a Failure of Voltage Sensor in PWM Converter), Korean Patent 10-2012-0041019, May 29, 2013.
14. Űȸθ ̿ 뿬 dz¹ý ý ִ (Grid Connected Wind Power System and Sensorless Maximum Power Point Tracking Control Method Thereof Using Neural Network), Korean Patent 10-1287319, July. 10, 2013.
15. ºȯġ ġ (Apparatus and Method for a Fault Diagnosis of Direct Current Terminal Voltage Sensor of Grid Connected Power Transformer and Fault-Tolerant Control), Korean Patent 10-1309287, Sep. 10, 2013.
16. ҿ ϴ 3- NPC ι ߼ (Simple Neutral-Point Voltage Control of Discontinuous PWM three-level NPC Inverters), Korean Patent 10-1309290, Sep. 10, 2013.
17. 3 TŸ ι ġ ġ (Fault Switch Diagnosis Apparatus and Method of 3 Level T Type Inverter), Korean Patent 10-1331028, Nov. 13, 2013.
18. DPWM ̿ 3- ι ߼ ġ (Neutral Point Voltage Controller and Method of three-level Inverter Using DPWM), Korean Patent 10-1343428, Dec. 13, 2013.
19. ⸦ ̿ 뿬 ι ְ ȸ (Circuitary and Method for Compensation of Harmonic Distortion for Grid-Connected Inverter System Using a Proportion Resonant Controller), Korean Patent 10-1381599, Mar. 31, 2014.
20. η ¾籤 ƮĿ (Sun Tracker Through Controlling Buoyancy), Korean Patent 10-1387491, April 15, 2014.
21. 3 NPC ιͿ Ŭε ʴ ġ (Simple Compensation Method of Unclamped Switch Voltages in a Three-Level NPC Inverter), Korean Patent 10-1627307, May 13, 2014.
22. Ͽ ϴ ġ (Direct Current Uninterruptible Power Supply System), Korean Patent 10-1400693, May 22, 2014.
23. ¾籤 ý ¾籤 ý (Stand-Alone PV Power Generation System and Charging Controlling Method Thereof), Korean Patent 10-1498449, Feb. 26, 2015.
24. 3 Ǿ Ÿ Ī ġ (Diagnosis Apparatus and Method of Open Switch Fault of Back to Back Converter of NPC type Topology), Korean Patent 10-1501118, Mar. 04, 2015.
25. 3 3 ⸦ Ī ȣ ߻ Ī ȣ ߻ (Switching Signal Generator and Switching Signal Generating Method for 3-phase 3-level Rectifier), Korean Patent 10-1648002, Aug. 08, 2016.
26. ¾ Ʈ ̸ ̿ ý (Boost Matrix Converter and Motor Driving System Using Thereof), Korean Patent 10-1661567, Sep. 26, 2016.
27. ҿ ȯ ġ (Discontinuous Voltage Modulation Based Grid Connected Power Inverter and Method for The Same), Korean Patent 10-1721238, Mar. 23, 2017.


Patent Pending

1. ġ (Driving Device For Dual Parallel Motors), Korean Patent 10-2016-0113006, Sep 02, 2016.