US 2018/0025832 A1 · Multiphase Voltage Converter with Coupled Inductors of Reduced Winding loss and Core Loss

Abstract

A multiphase switching DC-DC converter generates an output voltage from an input voltage. The converter includes multiphase coupled inductors having lateral magnetic core and non-looping conductors. The currents in conductors of the inductors flow in opposite directions, and therefore, the coupled inductors are inversely coupled and have a relatively low resistance and relatively small core volume. The reduced resistance of the inductor windings combined with smaller volume of magnetic core in the coupled inductors increases energy conversion efficiency and improves transient response of the converter. The coupled inductors can be employed in buck or boost or buck-boost converters, and they can also be used in buck or boost or buck-boost derived converters with isolation transformers.

Claims19

Dependent claims

A multiphase coupled inductor for a multiphase voltage converter, comprising:

a) a magnetic core having
1) a first core structure extending, in a first plane, along a first linear axis,
2) a second core structure extending, in a first plane, along a linear axis parallel to the said first linear axis;
b) a first inductor comprising a non-looping electrical conductor extending, in a second plane, linearly from a first inductor conductor first end to a first inductor conductor second end, along a second linear axis;
and
c) a second inductor comprising a non-looping electrical conductor extending, in a second plane, linearly from a second inductor conductor first end to a second inductor conductor second end, along a linear axis parallel to the said second linear axis.

3 more elements

A multiphase voltage converter, comprising:

a) a magnetic core;
b) a first phase circuit comprising
1) a first inductor conductor that is non-looping with respect to the magnetic core,
2) top and bottom switches connected to the first inductor conductor first end,
3) a converter voltage output connected to the first inductor conductor second end, and
4) top and bottom switches operable for alternately charging and discharging the first inductor;
and
c) a second phase circuit comprising
1) a second inductor conductor that is non-looping with respect to the magnetic core,
2) top and bottom switches connected the second inductor conductor second end,
3) a converter voltage output connected to the second inductor conductor first end, and
4) top and bottom switches operable for alternately charging and discharging the second inductor, wherein
the magnetic core is constructed with an air gap and said construction and arrangement including:
i) a first core structure, extending in a first plane, along a first linear axis,
ii) a second core structure extending, in a first plane, along a linear axis parallel to the said first linear axis,
said first inductor extends, in a second plane, linearly from a first inductor conductor first end to a first inductor conductor second end, along a second linear axis, and
said second inductor extends, in a second plane, linearly from a second inductor conductor first end to a second inductor conductor second end, along a linear axis parallel to the said second linear axis.

14 more elements

A single phase voltage converter, comprising:

a) a magnetic core comprising
1) a first core structure extending, in a first plane, along a first linear axis,
2) a second core structure extending, in a first plane, along a linear axis parallel to the said first linear axis;
b) a single phase circuit comprising:
1) an inductor that is non-looping with respect to the magnetic core, extending in a second plane, linearly from an inductor conductor first end to an inductor conductor second end, along a second linear axis, wherein the inductor is connected between a midpoint of the top and bottom switches and ground, and the switches are constructed and arranged to alternately charge and discharge the inductor, and
2) top and bottom switches connected in series between a voltage source and ground.

3 more elements

Dependencies are inferred from the claim text.

Multiphase Voltage Converter with Coupled Inductors of Reduced Winding loss and Core Loss

Life of this patent

Multiphase Voltage Converter with Coupled Inductors of Reduced Winding loss and Core Loss

Life of this patent

Abstract

Claims19