Resonant DC-DC power converter assembly

Patent metadata

Field	Value
Publication number	US-10020747-B2
Application number	US-201515126384-A
Country	US
Kind code	B2
Filing date	Apr 14, 2015
Priority date	Apr 15, 2014
Publication date	Jul 10, 2018
Grant date	Jul 10, 2018

Abstract

The present invention relates to a resonant DC-DC power converter assembly comprising a first resonant DC-DC power converter and a second resonant DC-DC power converter having identical circuit topologies. A first inductor of the first resonant DC-DC power converter and a second inductor of the second resonant DC-DC power converter are configured for magnetically coupling the first and second resonant DC-DC power converters to each other to forcing substantially 180 degrees phase shift, or forcing substantially 0 degree phase shift, between corresponding resonant voltage waveforms of the first and second resonant DC-DC power converters. The first and second inductors are corresponding components of the first and second resonant DC-DC power converters.

First claim

The invention claimed is:

1. A resonant DC-DC power converter assembly comprising:
a first resonant DC-DC power converter and a second resonant DC-DC power converter having identical circuit topologies,
a first inductor of the first resonant DC-DC power converter and a second inductor of the second resonant DC-DC power converter, which are configured to magnetically couple the first and second resonant DC-DC power converters to each other thereby forcing a substantially 180 degree phase shift, or forcing a substantially 0
degree phase shift, between corresponding resonant voltage waveforms of the first and second resonant DC-DC power converters,
wherein the first and second inductors are corresponding components of the first and second resonant DC-DC power converters,
wherein the first resonant DC-DC power converter comprises:
a first input side circuit comprising a positive input terminal and a negative input-terminal for receipt of a first input voltage,
a first controllable switch arrangement driven by a first switch control signal to set a switching frequency of the first converter,
a first resonant network coupled to an output of the first controllable switch arrangement to generate alternatively increasing and decreasing resonant current in the first resonant network in accordance with the first switch control signal,
a first rectification circuit connected to an output of the first resonant network,

wherein the second resonant DC-DC power converter comprises:
a second input side circuit comprising a positive and a negative input terminals for receipt of the first input voltage or a second input voltage,
a second controllable switch arrangement driven by a second switch control signal to set a switching frequency of the second converter, and
a second resonant network coupled to an output of the second controllable switch arrangement to generate alternatively increasing and decreasing resonant current in the second resonant network in accordance with the second switch control signal;
wherein an output of the second resonant network is connected to the first rectification circuit or connected to a second rectification circuit,
wherein the first inductor is arranged in series with a control terminal of the first controllable switch arrangement, and
wherein the second inductor is arranged in series with a control terminal of the second controllable switch arrangement so as to force a substantially 180 degree phase shift between the first switch control signal and the second switch control signal or force a substantially 0 degree phase shift between the first switch control signal and the second switch control signal.

2. The resonant DC-DC power converter assembly according to claim 1 , wherein the first and second inductors are configured to force the substantially 180 degree phase shift between the corresponding resonant voltage waveforms of the first and second resonant DC-DC power converters, and
the output of the second resonant network is connected to the second rectification circuit to generate a first converter output voltage at an output of the first rectification circuit and generate a second converter output voltage at an output of the second rectification circuit.

3. The resonant DC-DC power converter assembly according to claim 2 , wherein the first converter output voltage of the first resonant DC-DC power converter and the second converter output voltage of the second resonant DC-DC power converter are coupled in series across a converter assembly load.

4. The resonant DC-DC power converter assembly according to claim 1 , wherein the positive and negative input terminals of the first resonant DC-DC power converter and the positive and negative input terminals of the second resonant DC-DC power converter are coupled in series across a common AC or DC input voltage source.

5. The resonant DC-DC power converter assembly according to claim 1 , wherein the positive and negative input terminals of the first resonant DC-DC power converter and the positive and negative input terminals of the second resonant DC-DC power converter are coupled in parallel to a common AC or DC input voltage source.

6. The resonant DC-DC power converter assembly according to claim 1 , wherein a first converter output voltage of the first resonant DC-DC power converter and a second converter output voltage of the second resonant DC-DC power converter are coupled in parallel to a converter assembly load.

7. The resonant DC-DC power converter assembly according to claim 1 , wherein the first controllable switch arrangement comprises one or more semiconductor switches and the second controllable switch arrangement comprises one or more semiconductor switches;
wherein each of the semiconductor switches comprises a semiconductor transistor, a MOSFET or an IGBT.

8. A resonant DC-DC power converter assembly comprising:
a first resonant DC-DC power converter and a second resonant DC-DC power converter having identical circuit topologies,
a first inductor of the first resonant DC-DC power converter and a second inductor of the second resonant DC-DC power converter, which are configured to magnetically couple the first and second resonant DC-DC power converters to each other thereby forcing a substantially 180 degree phase shift, or forcing a substantially 0 degree phase shift, between corresponding resonant voltage waveforms of the first and second resonant DC-DC power converters,
wherein the first and second inductors are corresponding components of the first and second resonant DC-DC power converters,
wherein the first resonant DC-DC power converter comprises a first self-oscillation feedback loop coupled between an output of a first controllable switch arrangement and a control terminal of the first controllable switch arrangement,
wherein the second resonant DC-DC power converter comprises a second self-oscillation feedback loop coupled between an output of a second controllable switch arrangement and a control terminal of the second controllable switch arrangement, and
wherein at least one of the first and second self-oscillation feedback loops comprises:
a first bias voltage source configured to generate a first adjustable bias voltage, and
a first inductor, having a substantially fixed inductance, coupled in-between the first bias voltage source and the control terminal of the first or the second controllable switch arrangement.

9. A resonant DC-DC power converter assembly comprising:
a first resonant DC-DC power converter and a second resonant DC-DC power converter having identical circuit topologies,
a first inductor of the first resonant DC-DC power converter and a second inductor of the second resonant DC-DC power converter, which are configured to magnetically couple the first and second resonant DC-DC power converters to each other thereby forcing a substantially 180 degree phase shift, or forcing a substantially 0 degree phase shift, between corresponding resonant voltage waveforms of the first and second resonant DC-DC power converters,
wherein the first and second inductors are corresponding components of the first and second resonant DC-DC power converters,
wherein the first inductor of the first and second magnetically coupled inductors has a quality factor (Q factor) larger than 5 or larger than 25, at a resonance frequency of a first resonant network and the second inductor of the first and second magnetically coupled inductors has a Q factor larger than 5, or larger than 25, at a resonance frequency of a second resonant network.

10. The resonant DC-DC power converter assembly according to claim 9 , wherein the first and second inductors are configured to force the substantially 0 degree

Assignees

• Univ Danmarks Tekniske

Inventors

• Madsen Mickey P

Classifications

• H02M3/33546 Primary

  with automatic control of the output voltage or current (H02M3/33561 takes precedence) · CPC title

• H02M1/44

  Circuits or arrangements for compensating for electromagnetic interference in converters or inverters · CPC title

• H02M7/5383

  in a self-oscillating arrangement (H02M7/538 takes precedence) · CPC title

• H02M3/338 Primary

  in a self-oscillating arrangement (H02M3/337 takes precedence) · CPC title

• H02M1/14

  Arrangements for reducing ripples from DC input or output · CPC title