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Measuring circuit for regulating DC voltage converters

A technology for measuring circuit and DC voltage, applied in the direction of adjusting electrical variables, converting DC power input to DC power output, power supply testing, etc., can solve problems such as inability to ensure

Active Publication Date: 2018-11-02
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem arises here that the actual switching instants of the switching elements are unknown due to unavoidable component tolerances and delay times, for example, in the actuation of the switching elements and in the detection of measured values.
That is to say, it cannot be guaranteed that the optimum switching time coincides with the actual switching time, or in other words that the switching-on and switching-off processes take place at the optimal switching time

Method used

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Embodiment Construction

[0030] exist figure 1A preferred embodiment of the inventive measuring circuit for regulating a DC voltage converter is schematically shown in . The DC voltage converter is a step-up converter and is designed as a resonant converter 100 . An input voltage 101 is applied between pole 102 and ground pole 103 . An output voltage 105 which is higher than the input voltage 101 is output via the two poles 106 and 107 . Coil 110 and a first capacitor, referred to below as resonant capacitor 140 , form a resonant circuit. In addition to the resonant capacitor, there is also a second capacitor, referred to below as output capacitor 150 . The switching means are designed as MOSFET transistors 120 , in particular N-MOSFET transistors. However, it is also possible within the scope of the invention to use P-MOSFETs or other suitable switching elements. MOSFET transistor 120 has a drain connection 121 , a gate connection 122 and a source connection 123 . MOSFET transistor 120 has a bo...

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Abstract

The invention relates to a measuring circuit for regulating a DC voltage converter (100), having a switching device (120), a diode (124) connected in parallel with the switching device, a measuring and regulating unit (130), said measuring and regulating The unit is designed to operate the switching device (120) when a predefined event is reached, after operating the switching device (120) to determine and analyze the voltage at the switching device (120) as a characteristic quantity, when said characteristic quantity lies within the allowable A parameter of a predefined event is changed outside a value range, wherein the allowed value range is determined by the forward voltage of a diode (124) connected in parallel.

Description

technical field [0001] The invention relates to a measuring circuit for regulating a DC voltage converter, a corresponding DC voltage converter and a method for regulating a DC voltage converter. Background technique [0002] DC voltage converters are used today in numerous fields, for example in mobile telephones, communication systems, computers or notebooks. The DC voltage converter receives a DC voltage as an input voltage and converts this DC voltage into a higher or lower DC voltage as an output voltage. The direct voltage converter ensures that the internal operating voltage of the device can be kept constant independently of the state of charge of the battery or can generate an internal operating voltage that is higher than the battery voltage. In photographic equipment, for example, a flash with a much higher voltage can be generated from a relatively low battery voltage. [0003] DC voltage converters can be constructed in very different embodiments, but they all...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/155H02M1/36
CPCH02M1/32H02M3/158G01R31/40H02M3/155
Inventor A.曼Q-M.勒T.舒马歇尔
Owner ROBERT BOSCH GMBH