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Switching power supply unit

A switching power supply, power supply technology, applied in the direction of output power conversion devices, electrical components, etc.

Inactive Publication Date: 2005-10-12
SIEMENS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Instantaneous overload can also be provided by a battery connected in parallel with the output, but this solution has its disadvantages, because the life and cost of the battery must be taken into account, and it is necessary to set up an additional circuit breaker, such as a special load circuit, to ensure that no A large discharge occurs, and in addition to the cost, the battery also has a considerable volume and weight

Method used

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  • Switching power supply unit
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Examples

Experimental program
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Embodiment Construction

[0021] As shown in Figure 1, the input voltage U E Regulated by rectifier D1, applied to capacitor C E The adjusted voltage U ZK Leads to the main winding WP of the transformer UET via a controlled switch. Sensor resistance R S In series with the controlled switch to determine the main current.

[0022] The controlled switch S is controlled by a control circuit AST, which provides a signal with a constant or even variable frequency pulse width modulated in the usual way. The control circuit is supplied with voltage U from an auxiliary winding WH and an auxiliary rectifier D2 V , the voltage is applied to a capacitor C4. Applied voltage U ZK A relatively high resistance resistor RV can be used as a starting circuit.

[0023] Within the secondary circuit, the voltage of the secondary winding WS is regulated using eg diodes D3 and D4 and inductor L together with a converter built in this example on the principle of a flux converter. It should be noted here that obviously ...

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PUM

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Abstract

A switching power supply device comprising at least one switch (S) controlled by a control circuit (AST), whereby an input DC voltage (Uv) is connected and cut off. A thermal model (THM) is provided in a controller (STE), whereby the temperature of at least one element (S; D3, D4, UET) can be calculated or estimated, and the thermal model is provided with at least one load-dependent A certain current value is used as the amount of power. When a preset limit value or a function of multiple limit values ​​is reached, the controller (STE) will output at least one limit signal (abs, ala) according to the calculated or estimated temperature for reducing the temperature. At least one limit signal (abs) is provided to the control circuit to reduce the temperature and thus reduce the power.

Description

technical field [0001] The present invention relates to a switching power supply for providing a controlled output voltage / current to a load and having at least one switch controlled by a control circuit whereby an input DC voltage is connected and cut off and provided with protection for overload conditions Set circuit breaker controller. Background technique [0002] For the purposes of the present invention, a switching power supply means any type of power supply which also includes switchable (i.e. clock-synchronized) semiconductor elements which produce a DC or AC output voltage to feed one or more loads. The invention particularly contemplates switching power supplies that produce a regulated output DC voltage, for example a regulated output DC voltage of eg 40 Volts, from an unregulated AC voltage of 230 / 400 Volts. [0003] In the rating setting of switching power supply, especially when it is used in industrial control, calculating the power consumption will be a m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M1/00H02M1/32
CPCH02M1/32
Inventor H·施韦格特H·韦恩梅尔
Owner SIEMENS AG