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Scaleable, Interchangeable Modular Power Conversion System for AC or DC Input

IP.com Disclosure Number: IPCOM000021248D
Publication Date: 2004-Jan-07
Document File: 3 page(s) / 94K

Publishing Venue

The IP.com Prior Art Database

Abstract

Disclosed is a method for a power conversion system with interchangeable input modules for AC inputs, and positive and negative DC inputs, which allows for standard power system building blocks. Benefits include greater flexibility on input voltages and reduced development costs.

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Scaleable, Interchangeable Modular Power Conversion System for AC or DC Input

Disclosed is a method for a power conversion system with interchangeable input modules for AC inputs, and positive and negative DC inputs, which allows for standard power system building blocks. Benefits include greater flexibility on input voltages and reduced development costs.

Background

Typical power supplies have a power factor correction circuit that provides a regulated, high voltage DC bus internal to the supply. The main switching converter then converts this high voltage bus into a square wave through a transformer that develops multiple output voltages, rectifies this switching waveform, and filters it into a DC output voltage (see Figures 1 and 2).

Currently, separate power supplies must be designed for either AC or DC inputs. Off-the-shelf solutions (either AC or DC input) are also available, but use multiple DC to DC converters.

The development time for a new power supply design in typically nine months; this solution can be very expensive, especially in cases where the new design is being used for a very low volume (i.e. DC input) product, or when both an AC and DC input power supply with the same output power are required.. In addition, there is very little support in the power supply industry for DC designs.

General Description

The disclosed method separates the power supply into two (2) separate modules at the high voltage DC bus point (see Figure 3):

 

  • The input module (i.e. the DC bus voltage, along with enable and control signals)
  • The output module (i.e. the main converter stage which provides the outputs and control/monitor signals required by the en...