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Method and circuit for adhering to maximum values for parameters of a power supply

A technology of output parameters and maximum values, applied in the direction of output power conversion devices, circuit devices, measuring current/voltage, etc., can solve the problems of difficult identification, high error-proneness, and consumption, and achieve simple cost and cheap design and wiring. Effect

Active Publication Date: 2019-03-05
SIEMENS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, the circuit of the power supply is relatively complex and complex due to the additional and often redundantly implemented circuit components for observing the predetermined maximum values ​​of the output parameters.
Due to the additional circuit components, for example, also higher costs, higher error-proneness and possibly also greater space requirements for the power supply
In addition, for example, some faults, so-called "latent" faults, may also be difficult to detect due to additional circuit components and thus possibly prevent a shutdown of the power supply when a predetermined maximum value for an output parameter is exceeded. broken

Method used

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  • Method and circuit for adhering to maximum values for parameters of a power supply
  • Method and circuit for adhering to maximum values for parameters of a power supply
  • Method and circuit for adhering to maximum values for parameters of a power supply

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Embodiment Construction

[0034] figure 1 An exemplary embodiment of the circuit according to the invention is shown schematically, with which a predefinition of the output parameters of the power supply SV, mainly the output current Ia and / or the output power, can be carried out. The maximum value of the method according to the invention. Maximum values ​​for the output parameters of the power source SV or for the output current Ia and the output power can be specified, for example, by safety regulations and / or guidelines such as UL508 class 2 or NEC class 2.

[0035] The circuit according to the invention comprises a power supply SV which has at least one potential-limited switching converter, a switching element SE, an output voltage regulation unit and an internal current limiting device. exist figure 1 and the following figure 2 with 3 However, a detailed illustration of the circuit components or structural units of the power supply SV is omitted for better clarity.

[0036] The power supply...

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Abstract

A method and a circuit for complying with specified maximum values for output parameters a power supply unit includes at least a non-floating switch converter, an output voltage control unit, a current limiter and a switch element, wherein actual values of the current and voltage outputs of the power supply unit are measured continuously, where an evaluation unit calculates actual output power values of the power supply unit from the actual measured values of the output current and voltages, and subsequently compares at least the respective actually measured values of the output current and the respective actually calculated output power values with specified maximum values such that if at least one of the specified maximum values is exceeded by an actually measured value of the output current and / or by an actually calculated output power value, a current flow in the power supply unit is then interrupted by the evaluation unit.

Description

technical field [0001] The invention relates to a method for observing a predetermined maximum value of an output variable of at least one power supply, in particular when a so-called single fault occurs in at least one power supply, wherein the output variable is in particular output current and output power. The at least one power supply here includes at least one potential-bound switching converter, switching elements, an output voltage regulation unit and an internal current limiting device. Furthermore, the invention also relates to an associated circuit for carrying out the method according to the invention. Background technique [0002] In many electrical installations today, power sources are frequently used which provide a DC voltage as output voltage for supply. Such power supplies are often used in switchgear cabinets for electrical installations in order to provide, for example, control electronics and other parts of the electrical installation with a predefine...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/156
CPCH02M3/156H02M3/1557H02H3/087H02H3/42H02H7/1203H02H7/1227H02M3/33507H02M7/1555G01R19/16538H02H1/0007
Inventor K.本尼施W.保罗
Owner SIEMENS AG
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