Unlock instant, AI-driven research and patent intelligence for your innovation.

Determination of phase offsets in power supply system having multiple switching converters

A phase shifting and power supply system technology, applied in control/regulation systems, output power conversion devices, instruments, etc., can solve the problem of increasing the number of phase shifting values, not being able to support optimization, difficulty in phase shifting of the lowest input ripple current, etc. question

Inactive Publication Date: 2015-08-05
TELEFON AB LM ERICSSON (PUBL)
View PDF6 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as the number of converters increases, the number of possible combinations of phase offset values ​​increases dramatically
This makes it very difficult to manually find the phase offset that gives the lowest input ripple current
Furthermore, known methods of setting the phase offset have become too slow to support "on the fly" optimization of the phase offset in response to changes in the load of the voltage converter during operation of the power supply system, and thus maintain low input voltage ripple

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Determination of phase offsets in power supply system having multiple switching converters
  • Determination of phase offsets in power supply system having multiple switching converters
  • Determination of phase offsets in power supply system having multiple switching converters

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0037] figure 2 is a schematic diagram of a power supply system with multiple voltage converters in the form of an IBA power system according to a first embodiment of the invention.

[0038] figure 2 The IBA power system 100 shown in includes a plurality of voltage converters 200-1 to 200-N, each of which is shown in figure 1 The example in is also a buck topology regulator in the form of an SMPS. Therefore, each of the voltage converters 200-1 to 200-N delivers the regulated output voltage Vout to its load 300-k by switching a switching element (eg, a power transistor, such as a power MOSFET) in the voltage converter. k . However, it should be noted that output voltage regulation is not a necessary feature of the voltage converters 200-1 to 200-N, so typically only some of the voltage converters 200-1 to 200-N or none of the voltage converters 200-1 to 200-N The 200-N can provide a regulated output voltage.

[0039] Switching of switching elements in voltage converter ...

no. 2 example

[0102] For good optimization of the phase-extended configuration, it may not be sufficient to evaluate the input current RMS value. For example, Figure 10A and 10B Both phase extension configurations shown in , give the same input current RMS value as calculated in Equation 5. However, Figure 10B The configuration in will produce lower peak-to-peak input voltage ripple due to the phase spreading over the switching period.

[0103] In a second embodiment, a corresponding switching phase offset of the voltage converter is set to reduce not only the input current ripple, but also the input voltage ripple. High current ripple results in high levels of radiated emissions, increases power dissipation, and stresses the input capacitors. Therefore, larger and more expensive capacitors may be required to handle the current ripple. On the other hand, keeping the peak-to-peak input voltage ripple low is exactly the purpose of the input capacitance and is desired in order to achiev...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A controller (500) for determining a distribution of switching phases among switching elements of a power supply system The power supply system has a plurality of voltage converters, each comprising a switching element and being arranged to convert an input voltage supplied to the voltage converters to a respective output voltage by switching the switching element at a predetermined frequency. The controller (500) comprises a receiver (510) for receiving one or more signals indicative of a respective contribution from each of the voltage converters to a ripple current component of an input current of the voltage converters, and a rank determining module (520) configured to rank the voltage converters in order of decreasing contribution to the ripple current. The controller (500) further comprises a switching phase offset calculator (530) configured to calculate a respective switching phase offset that is to be applied for the switching element in each of the voltage converters by: (i) calculating respective phase offsets of the two highest ranked voltage converters that would minimise an input current ripple caused only by said two highest ranked voltage converters; (ii) calculating a phase offset of the next-highest ranked voltage converter that would minimise an input current ripple caused only by said next-highest ranked voltage converter and the voltage converters ranked higher than said next-highest voltage converter; and (iii) repeating step (ii) for each subsequent voltage converter in the ranking. The controller (500) also includes an output signal generator (540) configured to generate one or more output signals defining the calculated switching phase offsets to be applied to the switching of the respective switching elements.

Description

technical field [0001] The disclosure herein relates generally to the field of power supply systems having a plurality of voltage converters, each configured to convert an input voltage to an output voltage by switching a switching element at a predetermined frequency, and more particularly to determining this Distribution of switching phases among voltage converters in a power supply system. Background technique [0002] In recent years, the development of power supply systems with multiple switching voltage converters has led to improvements in the performance and efficiency of a variety of electronic devices. [0003] For example, the need for faster and more complex signal and data processing than ever before in a variety of application areas has driven the need for a new generation of signal processing systems with multiple high-performance integrated circuits such as processors, ASICs, and FPGAs. Many high performance integrated circuits are characterized by their nee...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/158H02M1/14
CPCH02M3/158H02M1/14H02M2001/008H02M2001/007H02M1/007H02M1/008H02M1/15H02M3/156H02M3/157H02M3/33507H02M3/1586
Inventor 安德里斯·拉森马格纳斯·梅尔泰格托比约恩·霍姆伯格
Owner TELEFON AB LM ERICSSON (PUBL)