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Clocked voltage converter

A technology of voltage converter and synchronous voltage, which is applied in the direction of output power conversion devices, instruments, electric light sources, etc., and can solve the problems of high cost, large tolerance, and large circuit technology overhead

Inactive Publication Date: 2015-06-03
SIEMENS MOBILITY GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The circuit-technical realization with the aid of synchronous voltage converters is expensive in the case of optocouplers with tight tolerances, or in the case of low-cost optocouplers with relatively large tolerances and thus imprecise very expensive

Method used

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  • Clocked voltage converter
  • Clocked voltage converter
  • Clocked voltage converter

Examples

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Embodiment Construction

[0030] figure 1 is shown with the input voltage for U E The input terminal E 1 and galvanically isolated from it (electrically isolated) for multiple output voltages U An output terminal A 1 The circuit of adjustable synchronous voltage converter 10 . A synchronous voltage converter 10 operating as a DC voltage converter has on the input side and a primary winding L 1 and the secondary winding L 2 The primary side of the transformer 11 has a semiconductor switch 12 referred to below as a switching transistor. The switching transistor 12 is controlled by a pulse width modulator 13 hereinafter referred to as PWM means.

[0031] The transformer 11 arranged downstream of the switching transistor 12 performs the voltage conversion and the input E of the voltage converter 10 1 and output A 1 Potential isolation between. A rectifier 14 in the form of a series diode and a capacitor 15 connected in parallel for smoothing the pulsed or pulsating DC voltage generated by the diode ...

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PUM

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Abstract

The invention relates to a voltage converter (10) which is clocked in a regulated manner and has DC isolation and regulated adjustment of a number of output voltages (UAn) from an input voltage (UE) and has, on the input side, a semiconductor switch (12) controlled using a PWM device (13) and has, on the output side, a rectifier (14) and a desired / actual value comparator (20). A frequency-controlled desired value changeover means (30) changes over a first desired value (UAn) to a second desired value (UAn+1) associated with a currently selected operating frequency (fan) on the basis of an adjustable operating frequency (fan) of the PWM device (13), wherein the converter regulation or control means generates a control signal (SR, SD) from a desired value deviation and supplies said control signal to the PWM device (13) in order to adjust the currently selected output voltage (UAn).

Description

technical field [0001] The invention relates to a synchronous voltage converter having a galvanic isolation unit and a control unit adjustable to a plurality of output voltages by means of a PWM arrangement as a function of the input voltage. Background technique [0002] A synchronous voltage converter which converts a direct voltage fed in at the input into a direct voltage with a higher, lower or opposite voltage level is also referred to as a direct voltage converter (DC-DC converter). The voltage conversion takes place by means of at least one electronic semiconductor switch controlled with a specific switching or operating frequency and at least one converter-transformer for energy transmission and at least one rectifier diode for disconnecting the output DC voltage. [0003] A transformer in a voltage converter can operate as an energy store for a so-called flyback converter with a galvanic isolation between the converter input and the converter output. During the so...

Claims

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Application Information

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IPC IPC(8): H02M3/335H05B41/40H05B33/08H05B44/00
CPCH02M3/33507H02M3/33523H02M3/33553H02M1/0025
Inventor W.尤厄P.F.奥基雷
Owner SIEMENS MOBILITY GMBH
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