Unlock instant, AI-driven research and patent intelligence for your innovation.
DC converter
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A technology of DC conversion and DC power supply, which is applied in the conversion device of output power, the conversion of DC power input to DC power output, and the adjustment of electrical variables, etc. It can solve resonance deviation, abnormal operation, and energy cannot be transmitted to the secondary side problem, to achieve the effect of smooth switching
Inactive Publication Date: 2016-06-22
SANKEN ELECTRIC CO LTD
View PDF4 Cites 0 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
[0004] However, when the switching method of the prior art is applied to the half-wave current resonance method, the following disadvantages will occur: the voltage of the resonancecapacitor changes rapidly, and abnormal operation such as resonance deviation occurs.
like figure 1 As shown, according to the way of the prior art, the fast switching has produced the following abnormal operation: the voltage of the resonant capacitor Cri has undergone a sharp change, resulting in resonance deviation, and there is still energy that cannot be transmitted to the second Secondary situation
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more
Image
Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0057] Such as figure 2 As shown, it is a schematic structural diagram of a DC conversion device according to Embodiment 1 of the present invention. The DC conversion device includes: a first series circuit, a second series circuit, a third series circuit, a rectification smoothing circuit, and a PWM (PulseWidthModulation, pulse width modulation ) control unit, voltage comparison calculation unit and opening suppression unit.
[0058] The first series circuit, connected in parallel with the DC power supply Vi, includes a first switch unit Q1 and a second switch unit Q2 connected in series;
[0059] The second series circuit, connected in parallel with the DC power supply Vi, includes a third switch unit Q3 and a fourth switch unit Q4 connected in series;
[0060] The third series circuit, connected between the connection point of the first switching unit Q1 and the second switching unit Q2, and the connection point of the third switching unit Q3 and the fourth switching unit...
Embodiment 2
[0111] Embodiment two (best embodiment)
[0112] Such as Figure 7 As shown, it is a schematic structural diagram of a DC conversion device according to Embodiment 2 of the present invention. Such as Figure 8 As shown in FIG. 2 , it is a schematic structural diagram of the control circuit of the DC conversion device according to Embodiment 2 of the present invention. Such as Figure 9 As shown in , it is a waveform diagram of each part of the control circuit in the second embodiment of the present invention during the switching process. Figure 10 It is the action waveform of the relevant signals in the switching process of the DC conversion device of the second embodiment of the present invention Figure 1 .
[0113] Figure 8 It mainly includes the following circuit components:
[0175] Such as Figure 16 As shown, it is a schematic structural diagram of a DC conversion device according to Embodiment 3 of the present invention. In this embodiment, on the basis of the foregoing embodiments, the arrangement of the voltage resonance capacitor Crv is changed. In the previous embodiments, the voltage resonance capacitor Crv is respectively connected to each switch unit. In this embodiment, the voltage resonance capacitor Crv is collectively arranged on the switch units below the circuit and connected in parallel to Q2 and Q4.
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More
PUM
Login to View More
Abstract
The invention provides a direct-current conversion device which comprises an opening amplitude restraining unit used for controlling the opening amplitude of a fourth switch unit to enable the opening amplitude of the fourth switch unit to be gradually reduced to 0% according to the voltage variation when the voltage of a direct current power supply or the sub-voltage of the voltage of the direct current power supply exceeds a preset first reference voltage and controlling the opening amplitude of the fourth switch unit to enable the opening amplitude of the fourth switch unit to be gradually increased to be identical with the opening amplitude of a first switch unit according to the voltage variation when the voltage of the direct current power supply or the sub-voltage of the voltage of the direct current power supply is lower than the preset first reference voltage. The direct current conversion device can gradually control the opening amplitude of the switch units according to the variation of the voltage or the variation of the sub-voltage of the voltage of the direct current power supply during switching between a full bridge mode and a half bridge mode by adding the opening amplitude restraining unit, so that the opening amplitude changes slowly, and switching can be performed slowly.
Description
technical field [0001] The invention relates to a direct current conversion device, in particular to a direct current conversion device which is used in a current resonance power supply and can switch between a full bridge working mode and a half bridge working mode. Background technique [0002] Resonant power supplies can generally be divided into full-bridge resonant power supplies and half-bridge resonant power supplies. Generally, when the input voltage is low, a full-bridge resonant power supply is mostly used, and when the input voltage is high, a half-bridge resonant power supply is mostly used. Specifically, for example, in the world, there are two commonly used alternating voltages of 100V and 240V. In the case of an AC voltage of 100V, a full-bridge resonant power supply is commonly used. In the case of an AC voltage of 240V, a half-bridge resonant power supply is commonly used. In order to meet the needs of the above two voltages, there are resonant power supp...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More
Application Information
Patent Timeline
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to View More 
Login to View More