US 2014/0177288 A1Published application

Flyback converter

AssigneeSamsung Electro-Mechanics Co., Ltd.

InventorsIn Wha Jeong, Bum Seok Suh, Kwang Soo Kim

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Abstract

There is provided a flyback converter, including: a power supply unit supplying input power; a transformer unit including first and second transformers converting first and second primary current from the power supply unit into first and second secondary current, respectively; a main switch unit including first and second main switches respectively intermitting the first and second primary current flowing in respective primary windings of the first and second transformers; an auxiliary switch unit including first and second auxiliary switches forming respective transfer paths for dump power present before the first and second main switches are switched on; and an auxiliary inductor unit including first and second auxiliary inductors respectively adjusting the amount of current flowing in the first and second auxiliary switches during the switching operation thereof, wherein the first and second main switches perform a switching operation while having a predetermined phase difference therebetween.

Claims16

Dependent claims

A flyback converter, comprising:

a power supply unit supplying input power;
a transformer unit including a first transformer converting a first primary current from the power supply unit into a first secondary current and a second transformer converting a second primary current from the power supply unit into a second secondary current;
a main switch unit including a first main switch intermitting the first primary current flowing in a primary winding of the first transformer and a second main switch intermitting the second primary current flowing in a primary winding of the second transformer;
an auxiliary switch unit including a first auxiliary switch forming a transfer path for dump power present before the first main switch is switched on and a second auxiliary switch forming a transfer path for dump power present before the second main switch is switched on;
and
an auxiliary inductor unit including a first auxiliary inductor adjusting an amount of current flowing in the first auxiliary switch during a switching operation of the first auxiliary switch and a second auxiliary inductor adjusting an amount of current flowing in the second auxiliary switch during a switching operation of the second auxiliary switch,
wherein the first main switch and the second main switch perform a switching operation while having a predetermined phase difference therebetween.

4 more elements

A flyback converter, comprising:

a power supply unit supplying input power;
a first transformer connected to one terminal of the power supply unit to convert a first primary current from the power supply unit into a first secondary current;
a second transformer connected to one terminal of the power supply unit in parallel to convert a second primary current from the power supply unit into a second secondary current;
a main switch unit including a first main switch intermitting the first primary current flowing in a primary winding of the first transformer and a second main switch operating while having a predetermined phase difference from the first main switch and intermitting the second primary current flowing in a primary winding of the second transformer;
an auxiliary switch unit including a first auxiliary switch forming a transfer path for dump power present before the first main switch is switched on and a second auxiliary switch forming a transfer path for dump power present before the second main switch is switched on;
and
an auxiliary inductor unit including a first auxiliary inductor adjusting an amount of current flowing in the first auxiliary switch during a switching operation of the first auxiliary switch and a second auxiliary inductor adjusting an amount of current flowing in the second auxiliary switch during a switching operation of the second auxiliary switch.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 13/794,036Filed 11 Mar 2013
Priority: KR 10-2012-014934920 Dec 2012
Published: 26 Jun 2014
Term ends: Not estimatedThe source records don’t support an estimate.

Classification4 codes

H02M 3/285
Using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC: single converters…
H02M 3/33507
Using semiconductor devices only: with automatic control of the output voltage or current, e.g. flyback converters
H02M 3/33569
Using semiconductor devices only: having several active switching elements
H02M
Apparatus for conversion between ac and ac, between ac and dc, or