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Switching converter

A technology of flyback converters and transformers, which is applied in a field that can solve problems such as consumption

Active Publication Date: 2009-08-19
SIEMENS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As already mentioned, in the case of a high input voltage, a high direct-axis voltage part is also formed due to the series regulator LAE, which leads to unnecessary consumption

Method used

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  • Switching converter
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Examples

Experimental program
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Embodiment Construction

[0026] Such as figure 2 The shown embodiment according to the invention differs from the circuit according to the state of the art shown in FIG. W P and a dotted representation of the W1 deviation. This off-state voltage is rectified by diode D4 and passed through storage capacitor Cs.

[0027] Because the windings of the transformers are interconnected, the off-state (auxiliary) voltage is automatically adjusted in a combined switching circuit operating on the flyback converter principle, which the present invention utilizes. The coil W2 is arranged such that the supply voltage Uh required by the control circuit AST is greater than the output voltage Uh1 of the series regulator LAE during operation at normal speed, for example by approximately 1 to 2 volts. The voltage output terminals Uh and Uh1 are connected to each other through a non-coupling diode D3, and the control circuit AST is powered by the coil W2 as long as the voltage Uh is greater than the voltage Uh1. This...

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PUM

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Abstract

A switching converter in which an input voltage can be switched by means of at least one controlled switch to at least one primary winding of a transformer, with a control circuit for controlling the switch, to which control circuit a regulating signal in the sense of regulating at least one output voltage is sent, wherein the power supply of the control circuit takes place via the forward voltage of an auxiliary winding of the transformer, a rectifier, a capacitor and a series regulator, on the one hand, and, on the other hand, starting from the input voltage, via a current path and a storage capacitor, and the off-state voltage of an auxiliary winding, which is rectified by means of a rectifier, is additionally sent to the control circuit for power supply, wherein the rectified off-state voltage is used during the operation for supplying the control circuit as long as it has a sufficient voltage level.

Description

technical field [0001] The present invention relates to a flyback converter in which an input voltage can be switched to at least one primary winding of a transformer by means of at least one controlled switch with a control circuit for controlling the switch to which a regulation signal is sent circuit to regulate at least one output voltage, wherein the control circuit is powered on the one hand by the forward voltage of an auxiliary coil of the transformer, a rectifier, a capacitor and a series regulator, and on the other hand by the input voltage via the current path and a storage The capacitor is powered. Background technique [0002] In such flyback converters, the control circuit receives a rectified output voltage through a series regulator through an auxiliary winding, which operates during the conduction phase of the converter. In order to ensure that the control circuit will start when connected to the output voltage, the supply voltage input of the control circu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/335
CPCH02M2001/0045H02M3/33507H02M1/0045
Inventor 亚诺特·桑利德纳加莱·阿布杜拉森·哈勒克
Owner SIEMENS AG