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Control method for power supply system

A control method and power supply system technology, which is applied in the direction of control/regulation system, electrical components, and adjustment of electrical variables, and can solve problems such as uneven loads and deviation settings of parallel power components

Active Publication Date: 2014-12-10
SIEMENS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In particular, non-uniform loading of parallel-connected power components due to deviating settings or deviating internal resistances of the output voltage regulators

Method used

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  • Control method for power supply system
  • Control method for power supply system
  • Control method for power supply system

Examples

Experimental program
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Embodiment Construction

[0035] The U / I characteristic curve shown in Figure 1a reproduces the output voltage U of the protected power supply OUT About the output current I OUT change curve. at output current I OUT In the first area a of , the power supply device is operated in normal mode. In this mode, power can be permanently delivered to the load. When the first current limit S1 is exceeded, the device transitions into the overload mode region b. Here, for example, a timer starts running. If the permissible duration is reached in this overload mode, the power supply is switched off.

[0036] If the current I OUT A further rapid increase without reaching the permissible duration in overload mode, the device reaches the restricted mode region c at the second current limit S2. Here, it is switched off after a very short time interval (eg 100 ms), because the linear limiting element absorbs excess energy. The duration in confinement mode depends primarily on the thermal loadability of the conf...

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Abstract

#CMT# # / CMT# The method involves controlling two or multiple power units (L1, L2) of a power supply system by using separate controllers (STR1, STR2). Each controller is defined with current threshold for controlling the associated power unit in a normal mode. Each controller is defined with a reduction value e.g. voltage difference or output voltage value, of output voltages (Uout1, Uout2) of the power units based on achievement of the current threshold. The output voltages of the power units are controlled to the reduction value by the respective controllers upon achieving the current threshold. #CMT# : # / CMT# The power units are designed as power circuit breakers. An independent claim is also included for a power supply system. #CMT#USE : # / CMT# Control method for a power supply system. #CMT#ADVANTAGE : # / CMT# The output voltages of the power units are controlled to the reduction value by the respective controller upon achieving the current threshold, thus enabling parallel connection of the power units without the need for superordinate control and without requiring signal connections between the controllers. The power units are controlled by using separate controllers, so that waste of output voltage is reduced during a normal operation, thus minimizing associated losses. #CMT#DESCRIPTION OF DRAWINGS : # / CMT# The drawing shows a circuit diagram of a power supply unit with two outputs connected in parallel with a controller. Iout1, Iout2 : Output currents L1, L2 : Power units S : Backup module STR1, STR2 : Controllers Uout1, Uout2 : Output voltages of power units.

Description

technical field [0001] The invention relates to a control method for a power supply system having at least two power components whose power outputs are connected in parallel, wherein each power component has an output voltage and is controlled by means of its own control device, and In this case, at least one first current limit is specified for each control device, which controls the assigned power components in normal mode up to the first current limit. Furthermore, the invention relates to a power supply system for implementing the control method. Background technique [0002] In order to supply loads with a predetermined voltage, power supply units are frequently used which convert the electrical energy of the supply network into the desired voltage. These are mostly clock-controlled switched-mode power supply sections with a power section and a control unit. Plants are also known which have a plurality of power components which are each actuated with their own control...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/158G05F1/46
CPCH02M3/1584H02M3/158
Inventor H.施维格特
Owner SIEMENS AG