Switched-mode power supply having self-optimizing efficiency
A switch-mode power supply and switching technology, applied in the power supply field, can solve the problems of limiting the achievable efficiency of switch-mode power supplies, and achieve the effect of optimizing efficiency
Active Publication Date: 2011-07-27
PHOENIX CONTACT GMBH & CO KG
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Problems solved by technology
However, the achievable efficiency of switch-mode power supplies is limited by long downtimes
[0004] Advantageously, switched-mode power supplies have a large tolerance range with respect to the power supply at the input and the load connected at the output, however, only very limited efficiencies are usually achieved at lower input voltages and smaller loads
Method used
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Embodiment Construction
[0037] exist figure 1 A block diagram of the circuitry of a preferred embodiment of the switched mode power supply 100 according to the present invention is shown in . The circuit comprises two input connections 101, 102 for connecting the switched-mode power supply to a mains voltage, preferably to the mains voltage of an AC power network, such as a grid set at a standard voltage of 230 V in Germany, or in The American continent is set to a grid with a grid AC voltage rating between 110V and 120V.
[0038] In the illustrated embodiment of the switch mode power supply 100, the switch mode power supply comprises a rectifier circuit 110 connected to the input terminal interface 101, 102, the output terminal of which is connected to the element 112 for correcting the power factor (hereinafter referred to simply as PFC (Power Factor Correction)) connection. The PFC 112 will provide an intermediate circuit voltage to a series connected direct current transformer 114 (hereinafter ...
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The present invention provides a switched-mode power supply (100), which comprises input connections (101, 102) for receiving an input voltage and / or an input current, output connections (103, 104) for providing an output voltage and / or an output current, a circuit arranged between the input and output connections for current and / or voltage conversion comprising at least one controllable switch, a control unit (200) for activating the at least one controllable switch by means of at least one pulse width modulation signal having a variable frequency and a variable duty cycle, and measuring devices (151, 141, 153, 143) connected to the control unit (200), at least designed to measure the input amperage, the input voltage, the output amperage, and the output voltage, wherein the control unit (200) is designed to monitor the efficiency of the switched-mode power supply (100) by means of measured values of the connected measuring devices, and to optimize the efficiency by means of a first digital control circuit by activating the at least one controllable switch. The invention further provides for a method for operating such a switched-mode power supply (100).
Description
technical field [0001] The present invention generally relates to the field of power supply technology, in particular to switch mode power supply technology. Background technique [0002] A switched-mode power supply is an electronic component that is used for current conversion and voltage conversion, and is widely used, for example, as a computer power supply or a memory power supply. However, switch-mode power supplies are used in many other areas as well. In particular, an unstable input voltage is used to generate a stable output voltage or output current through a switch-mode power supply. In this case, stabilization of the output value is achieved by means of an automatic regulation circuit by controlling the energy flux in the switched-mode power supply. Typically, this adjustment takes place via a time-controllable switch, which is designed as a transistor, for example. [0003] Switched-mode power supplies achieve significantly higher efficiencies than conventio...
Claims
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IPC IPC(8): H02M3/157H03K17/14H02M3/335
CPCY02B70/1475H03K17/14H02M2001/007H03K2217/0036H02M3/33592H02M3/28H02M1/4225Y02B70/126Y02B70/10H02M1/007
Inventor 吉多·雷默特
Owner PHOENIX CONTACT GMBH & CO KG