BOOST CONVERTER

• US 20120039095A1
• Filed: 05/24/2011
• Published: 02/16/2012
• Est. Priority Date: 08/12/2010
• Status: Abandoned Application

• Current Assignee: Samsung Electro-Mechanics Co., Ltd. (Samsung Group)
• Original Assignee: Samsung Electro-Mechanics Co., Ltd. (Samsung Group)
• Inventors: KIM, Hyo Young, KIM, Jong Rak, OH, Sung Hun, PARK, Jeong Hyun
• Application Number:
  US13/114,123
• Publication Number:
  US 20120039095A1
• Time in Patent Office: Days
• US Class Current: 363/21.04
• CPC Class Codes: H02M 3/155 using semiconductor devices only

Abstract

There is provided a boost converter capable of reducing internal pressure in elements without the employment of a separate snubber by clamping a voltage, transmitted to the elements, to a charging voltage or an output voltage during power conversion. The boost converter includes a transformer including a primary winding receiving input power and a secondary winding electromagnetically coupled to the primary winding and having a predetermined turns ratio therewith; a switching part allowing the input power transmitted to the primary winding to be on or off according to a predetermined switching duty; a clamping part including a link capacitor charged with the input power obtained when the switching part is switched on, and power transformed based on the predetermined turns ratio; and a stabilizing part stabilizing power outputted from the clamping part.

Claims

1. A boost converter comprising:

a transformer including a primary winding receiving input power and a secondary winding electromagnetically coupled to the primary winding and having a predetermined turns ratio therewith;

a switching part allowing the input power transmitted to the primary winding to be on or off according to a predetermined switching duty;

a clamping part including a link capacitor charged with the input power obtained when the switching part is switched on, and power transformed based on the predetermined turns ratio; and

a stabilizing part stabilizing power outputted from the clamping part.

2. The boost converter of claim 1, wherein a sum of a voltage level of power magnetically induced from the primary winding to the secondary winding and a voltage level of the input power is greater than a voltage level of power charged in the link capacitor.

3. The boost converter of claim 1, wherein the transformer further comprises:

a leakage inductor series-connected between one end of the primary winding and one end of an input power terminal through which the input power is transmitted; and

a magnetizing inductor parallel-connected to one end and the other end of the primary winding.

4. The boost converter of claim 3, wherein the switching part comprises a switch connected between the other end of the primary winding and a ground, and

the clamping part further comprises:

a first diode having an anode connected to the other end of the primary winding and a cathode connected to one end of the secondary winding; and

a second diode having an anode connected to one end of the input power terminal and a cathode connected to the other end of the secondary winding.

5. The boost converter of claim 4, wherein the stabilizing part comprises:

a third diode having an anode connected to the other end of the secondary winding; and

a capacitor connected to a cathode of the third diode and the ground.

6. The boost converter of claim 1, wherein the primary winding and the secondary winding are wound in the same direction.