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Regulation method for parallel operation of at least two self-oscillating switching converters

A converter, self-oscillation technology, applied in the field of regulation for running at least two self-oscillating switching converters in parallel, can solve the problem of no longer continuously giving and reduce ripple current load, etc., achieve simplified measurement value processing, The effect of reducing the ripple current load

Active Publication Date: 2019-07-16
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This can lead to the formation of beats, so that a temporal phase shift between the two self-oscillating switching converters, which reduces the ripple current load, is no longer permanently given.

Method used

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  • Regulation method for parallel operation of at least two self-oscillating switching converters
  • Regulation method for parallel operation of at least two self-oscillating switching converters
  • Regulation method for parallel operation of at least two self-oscillating switching converters

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Embodiment Construction

[0026] figure 1 In the schematic diagram it is shown for the input DC voltage U Batt Converted to output DC voltage U Bo The circuit arrangement 2. In the exemplary embodiment, the circuit arrangement 2 is designed as a boost converter (English: Boost Converter). Output DC voltage U Bo The value is greater than the input DC voltage U Batt value.

[0027] The circuit arrangement 2 can be employed in a motor vehicle (not shown) in order to supply an output DC voltage U to a boost capacitor, for example for a magnet injector Bo , the voltage height of the output DC voltage is at the input DC voltage U Batt and thus above the network voltage of the on-board electrical supply network of the motor vehicle.

[0028] In the present exemplary embodiment, the circuit arrangement 2 has a first self-oscillating switching converter 4, a second switching converter 6 connected in parallel to the first switching converter 4, and an input buffer unit 8, which is connected on the input s...

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Abstract

Regulation method for parallel operation of at least two self-oscillating switching converters. The invention relates to a method for parallel operation of at least a first self-oscillating switching converter (4) and a second self-oscillating switching converter (6), in which method a first voltage of the first switching converter (4) is detected parameter value and with the limit value (I thres ) comparison, the value of the first electrical parameter in the first switching converter (4) reaches or exceeds the limit value (I thres ) to deactivate the second self-oscillating switching converter (6), detect the value of the first electrical parameter of the second switching converter (6) and compare it with the limit value (I thres ) comparison, and the value of the first electrical parameter in the second switching converter (6) reaches or exceeds the limit value (I thres ) to deactivate the first self-oscillating switching converter (4).

Description

technical field [0001] The invention relates to a method for operating at least two self-oscillating switching converters in parallel and a circuit arrangement with two self-oscillating switching converters. Background technique [0002] Known switching converters. Switching converters are used to supply electrical equipment, for example control equipment for motor vehicles. In this case, the switching converter converts, for example, the 12V vehicle power supply network voltage of the motor vehicle's vehicle power supply network into a 40V voltage, for example. [0003] The switching converter can be configured as a buck converter and / or as a boost converter. [0004] A step-down converter, ie a step-down converter, provides an output voltage whose height is lower than the input voltage, while a boost converter, ie a boost converter, provides an output voltage whose height is greater than the input voltage. The combination of a buck converter and a boost converter is a b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/155H02M1/088
CPCH02M3/1584H02M3/1586
Inventor T.弗里德尔R.亨内
Owner ROBERT BOSCH GMBH