Bridgeless PFC Using Single Sided High Frequency Switching

• US 20150318780A1
• Filed: 11/06/2014
• Published: 11/05/2015
• Est. Priority Date: 11/07/2013
• Status: Abandoned Application

• Current Assignee: Rompower Technology Holdings, LLC (Ascom Holding AG)
• Original Assignee: Rompower Technology Holdings, LLC (Ascom Holding AG)
• Inventors: Davila, Marco Antonio
• Application Number:
  US14/535,000
• Publication Number:
  US 20150318780A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H02M 1/0085 Partially controlled bridges
• CPC Class Codes: H02M 1/42 Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
• CPC Class Codes: H02M 1/4225 using a non-isolated boost converter
• CPC Class Codes: H02M 1/4233 using a bridge converter comprising active switches
• CPC Class Codes: Y02B 70/10 Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes

Abstract

A new converter topology and control methods are presented that can be used for bridge less power factor conversion that are simple and do not introduce large common mode noise.

Claims

1. A method of electronic power conversion with an inductor followed by a higher than line frequency switching half bridge combined with a diode half bridge to rectify and boost the input AC line.

2. The method of 1 with active bridges replacing the diode portion of the half bridge switched at the line frequency.

3. An electronic power control method employing rectifying circuitry and dual current thresholds to control both portions of the switching cycle for the rectifying circuitry.

4. The control method of claim 3 using thresholds of opposite polarity.

5. The control method of claim 4 with particular thresholds calculated so that both transitions will have soft commutation for the targeted average current.

6. The control method of claim 5, wherein the rectifying circuitry comprises half bridge rectifying circuitry.

7. An electronic power control method employing rectifying circuitry and a single current threshold that can be moved to either control the lower ramp threshold or upper ramp threshold for the rectifying circuitry.

8. The control method of 7 wherein the smaller of a positive ramp or negative ramp portion is used.

9. The control method of claim 8, wherein the rectifying circuitry comprises half bridge rectifying circuitry.

10. An electronic power control method employing rectifying circuitry and a single current threshold and calculating the total period required to achieve the other current threshold for the rectifying circuitry.

11. The electronic power control method of claim 10 wherein the rectifying circuitry comprises half bridge rectifying circuitry.

13. The electronic power control method of claim 11 wherein the rectifying circuitry comprises half bridge rectifying circuitry.

12. An electronic power control method employing rectifying circuitry and a single current threshold for the ramp up and calculating the ramp down time required and setting the ramp down time for the rectifying circuitry.

14. An electronic power control method employing rectifying circuitry and a single current threshold for the ramp down and calculating the ramp up time required and the setting the ramp up time of the rectifying circuitry.

15. The electronic power control method of claim 14 wherein the rectifying circuitry comprises half bridge rectifying circuitry.