Improved input voltage circuit
阅读说明：本技术 改进型的输入电压电路 (Improved input voltage circuit ) 是由 李浔浔 赵传洲 武绍丽 于 2019-11-14 设计创作，主要内容包括：本发明涉及改进型的输入电压电路,其包括电源模块,电源模块包含电压输入信号、输入选择电路、升压充电电路、稳压供电电路、电源控制电路、电源功率变换、整流滤波电路、隔离反馈电路、以及电压输出信号；电压输入信号输出端分别与输入选择电路、升压充电电路、以及稳压供电电路的输入端电连接；输入选择电路、升压充电电路、以及稳压供电电路依次电连接；稳压供电电路输出端与输入选择电路输入端电连接；输入选择电路输出端与电源功率变换输入端电连接；稳压供电电路、电源控制电路、电源功率变换依次电连接；隔离反馈电路的输出端分别与电源控制电路与整流滤波电路的输入端电连接；本发明设计合理、结构紧凑且使用方便。(The invention relates to an improved input voltage circuit, which comprises a power supply module, wherein the power supply module comprises a voltage input signal, an input selection circuit, a boosting charging circuit, a voltage-stabilizing power supply circuit, a power supply control circuit, a power supply power conversion circuit, a rectification filter circuit, an isolation feedback circuit and a voltage output signal; the voltage input signal output end is respectively and electrically connected with the input ends of the input selection circuit, the boosting charging circuit and the voltage-stabilizing power supply circuit; the input selection circuit, the boost charging circuit and the voltage stabilization power supply circuit are electrically connected in sequence; the output end of the voltage-stabilizing power supply circuit is electrically connected with the input end of the input selection circuit; the output end of the input selection circuit is electrically connected with the power supply power conversion input end; the voltage-stabilizing power supply circuit, the power supply control circuit and the power supply power conversion are electrically connected in sequence; the output end of the isolation feedback circuit is respectively electrically connected with the input ends of the power supply control circuit and the rectification filter circuit; the invention has reasonable design, compact structure and convenient use.)
1. An improved input voltage circuit, characterized by: the power supply module comprises a voltage input signal, an input selection circuit, a boosting charging circuit, a voltage-stabilizing power supply circuit, a power supply control circuit, power supply power conversion, a rectification filter circuit, an isolation feedback circuit and a voltage output signal;
the voltage input signal output end is respectively and electrically connected with the input ends of the input selection circuit, the boosting charging circuit and the voltage-stabilizing power supply circuit; the input selection circuit, the boost charging circuit and the voltage stabilization power supply circuit are electrically connected in sequence; the output end of the voltage-stabilizing power supply circuit is electrically connected with the input end of the input selection circuit;
the output end of the input selection circuit is electrically connected with the power supply power conversion input end;
the voltage-stabilizing power supply circuit, the power supply control circuit and the power supply power conversion are electrically connected in sequence;
the output end of the isolation feedback circuit is respectively electrically connected with the input ends of the power supply control circuit and the rectification filter circuit;
the power supply power conversion output end is electrically connected with the input end of the rectification filter circuit;
the output end of the rectification filter circuit is electrically connected with the voltage output signal;
the input voltage of the voltage input signal is input to the voltage stabilization power supply circuit and is respectively used for supplying power to the boosting charging circuit, the input selection circuit and the power supply control circuit;
the input voltage is used for a boosting charging circuit, the input voltage is boosted to V in the boosting charging circuit to charge an energy storage capacitor in the boosting charging circuit, and the boosting charging circuit and the input voltage enter an input selection circuit simultaneously;
the input selection circuit is used for enabling the input voltage to enter the power supply power conversion circuit when the input voltage is judged to be normal, and enabling the voltage of the energy storage capacitor in the booster circuit to enter the power supply power conversion circuit when the input voltage is judged to be in a power failure state;
the power supply control circuit controls the power supply power conversion circuit to carry out voltage conversion, and the converted voltage enters the rectification filter circuit to obtain output voltage;
and the isolation feedback circuit samples the output voltage and feeds the output voltage back to the power supply control circuit, and the power supply control circuit acts on the power supply power conversion circuit to finally enable the output voltage after the rectification filter circuit to be stable and reliable.
2. The improved input voltage circuit of claim 1 further comprising a battery and/or rectifier; the voltage input signal is electrically connected with the storage battery and/or the rectifier;
when the voltage input signal is from the rectifier;
the rectifier comprises two input voltages connected in parallel, a comparator, a first total MOS (metal oxide semiconductor) tube, a second total MOS tube, a first optical coupler, a second optical coupler, a parallel first partial MOS tube group and a parallel second partial MOS tube group;
the output end of each of the two parallel input voltages is electrically connected with the corresponding input end of the comparator;
the other output end of the first path of input voltage is electrically connected with the input end of the parallel first branch MOS tube group;
the other output end of the second path of input voltage is electrically connected with the input end of the parallel second shunt MOS tube group;
the two output ends of the comparator are respectively and electrically connected with the corresponding total MOS tube, the output end of the first total MOS tube is electrically connected with a first optical coupler, the output end of the second total MOS tube is electrically connected with a second optical coupler, and the first optical coupler is electrically connected with a first sub MOS tube group in parallel;
the output end of the second total MOS tube is electrically connected with a second optical coupler, and the second optical coupler is electrically connected with a second partial MOS tube group in parallel;
at least two paths of input voltages of the rectifier are compared through a comparator respectively, the comparator controls one path with higher voltage to act, a total MOS (metal oxide semiconductor) tube on a control path is controlled to be opened through an optical coupler, and the input of the path is conducted.
Technical Field
The present invention relates to an improved input voltage circuit.
Background
Under the existing airplane power supply environment, the input power supply voltage of the secondary power supply module can be interrupted for a certain time, and the normal operation of a rear-stage system cannot be influenced by the continuous normal output of the module power supply. In order to meet the power failure resistance function, a large-capacity capacitor is generally added to a power input end of an existing power module, and the power module is kept to continuously output through energy stored by the large-capacity capacitor, so that the power failure resistance function is achieved.
Disclosure of Invention
To achieve the above object, the present invention provides an improved input voltage circuit.
According to the invention, the input highest voltage of the power module is raised to 60V, the high-voltage capacitor energy storage circuit is added at the input end, and the characteristic that the stored energy is more when the capacitor voltage is higher is utilized to provide large energy storage for a later-stage circuit, so that the long-time power failure resistance function is realized, the size of the power module is reduced, and the space utilization rate is improved.
The power supply module scheme comprises a voltage input signal, an input selection circuit, a boosting charging circuit, a voltage-stabilizing power supply circuit, a power supply control circuit, power supply power conversion, a rectification filter circuit, an isolation feedback circuit and a voltage output signal;
the voltage input signal output end is respectively and electrically connected with the input ends of the input selection circuit, the boosting charging circuit and the voltage-stabilizing power supply circuit; the input selection circuit, the boost charging circuit and the voltage stabilization power supply circuit are electrically connected in sequence; the output end of the voltage-stabilizing power supply circuit is electrically connected with the input end of the input selection circuit;
the output end of the input selection circuit is electrically connected with the power supply power conversion input end;
the voltage-stabilizing power supply circuit, the power supply control circuit and the power supply power conversion are electrically connected in sequence;
the output end of the isolation feedback circuit is respectively electrically connected with the input ends of the power supply control circuit and the rectification filter circuit;
the power supply power conversion output end is electrically connected with the input end of the rectification filter circuit;
the output end of the rectification filter circuit is electrically connected with the voltage output signal;
the input voltage of the voltage input signal is input to the voltage stabilization power supply circuit and is respectively used for supplying power to the boosting charging circuit, the input selection circuit and the power supply control circuit;
the input voltage is used for a boosting charging circuit, the input voltage is boosted to V in the boosting charging circuit to charge an energy storage capacitor in the boosting charging circuit, and the boosting charging circuit and the input voltage enter an input selection circuit simultaneously;
the input selection circuit is used for enabling the input voltage to enter the power supply power conversion circuit when the input voltage is judged to be normal, and enabling the voltage of the energy storage capacitor in the booster circuit to enter the power supply power conversion circuit when the input voltage is judged to be in a power failure state;
the power supply control circuit controls the power supply power conversion circuit to carry out voltage conversion, and the converted voltage enters the rectification filter circuit to obtain output voltage;
and the isolation feedback circuit samples the output voltage and feeds the output voltage back to the power supply control circuit, and the power supply control circuit acts on the power supply power conversion circuit to finally enable the output voltage after the rectification filter circuit to be stable and reliable.
The boost charging circuit is used for storing high-voltage energy of the energy storage capacitor, the energy storage capacity of the capacitor is increased, the power supply selection circuit is used for automatically judging the working state of the circuit, and seamless switching is performed to the energy storage capacitor for power supply when the power failure state occurs, so that the interruption of output voltage is prevented. Meanwhile, the rear-stage power supply conversion circuit is designed to be a high-voltage-resistant input power supply circuit and a high-voltage-resistant capacitor for power supply. All parts make this power module have anti long-time power down function under the combined action.
The invention boosts the voltage of the energy storage capacitor used in the prior art, so that the energy storage capacitor with smaller capacity can store more energy. The power supply conversion circuit is adjusted to enable the power supply module to work in a higher voltage state, the size of the power-down-resistant power supply module is reduced under the combined action of the power supply conversion circuit and the power supply module, and the power-down-resistant time is longer.
Further, the device also comprises a storage battery and/or a rectifier; the voltage input signal is electrically connected with the storage battery and/or the rectifier; when the voltage input signal is from the rectifier;
the functional circuit optimizes the design of elements by carrying out new control logic on the rectifier, reduces the input loss by more than 50 times, and increases the passable current from 5A to 45A, thereby greatly improving the application range of the functional circuit.
The rectifier comprises two input voltages connected in parallel, a comparator, a first total MOS (metal oxide semiconductor) tube, a second total MOS tube, a first optical coupler, a second optical coupler, a parallel first partial MOS tube group and a parallel second partial MOS tube group;
the output end of each of the two parallel input voltages is electrically connected with the corresponding input end of the comparator;
the other output end of the first path of input voltage is electrically connected with the input end of the parallel first branch MOS tube group;
the other output end of the second path of input voltage is electrically connected with the input end of the parallel second shunt MOS tube group;
the two output ends of the comparator are respectively and electrically connected with the corresponding total MOS tube, the output end of the first total MOS tube is electrically connected with a first optical coupler, the output end of the second total MOS tube is electrically connected with a second optical coupler, and the first optical coupler is electrically connected with a first sub MOS tube group in parallel;
the output end of the second total MOS tube is electrically connected with a second optical coupler, and the second optical coupler is electrically connected with a second partial MOS tube group in parallel;
at least two paths of input voltages of the rectifier are compared through a comparator respectively, the comparator controls one path with higher voltage to act, a total MOS (metal oxide semiconductor) tube on a control path is controlled to be opened through an optical coupler, and the input of the path is conducted.
The invention can greatly reduce conduction loss, generate less heat and improve over-current capability by utilizing the characteristic of low conduction impedance of the MOS tube.
The invention adopts a novel control circuit, replaces the rectifier tube used in the prior proposal with an MOS tube and adds a control logic circuit, increases the sensitivity of input switching, utilizes the characteristic of MOS low on-resistance, reduces the on-loss and greatly enhances the over-current capability.
The input selection circuit can greatly reduce conduction loss, reduce heating and improve overcurrent capacity by optimizing circuit design, and is suitable for application occasions of high-power supplies.
The invention has the advantages of reasonable design, low cost, firmness, durability, safety, reliability, simple operation, time and labor saving, capital saving, compact structure and convenient use.
Drawings
Fig. 1 is a block diagram of the present invention.
Fig. 2 is a schematic view of a portion of the present invention.
Fig. 3 is a schematic diagram of part two of the present invention.
Detailed Description
As shown in fig. 1, the present invention includes a rectifier and a power module electrically connected;
as shown in fig. 2, the power module scheme includes a voltage input signal, an input selection circuit 1, a boost charging circuit 2, a voltage stabilization
the voltage input signal output end is respectively and electrically connected with the input ends of the input selection circuit 1, the boost charging circuit 2 and the voltage-stabilizing
the output end of the input selection circuit 1 is electrically connected with the input end of the power
the voltage-stabilizing
the output end of the isolation feedback circuit 7 is respectively electrically connected with the input ends of the
the output end of the power
the output end of the rectifying and filtering
the input voltage of the voltage input signal to the voltage stabilization
the input voltage is used for the boost charging circuit 2, the input voltage is boosted to 60V in the boost charging circuit 2 to charge the energy storage capacitor in the boost charging circuit 2, and the boost charging circuit 2 and the input voltage enter the input selection circuit simultaneously;
the input selection circuit 1 is used for inputting input voltage into the power supply
the power
and the isolation feedback circuit 7 is used for sampling the output voltage and feeding the output voltage back to the
The boost charging circuit is used for storing high-voltage energy of the energy storage capacitor, the energy storage capacity of the capacitor is increased, the power supply selection circuit is used for automatically judging the working state of the circuit, and seamless switching is performed to the energy storage capacitor for power supply when the power failure state occurs, so that the interruption of output voltage is prevented. Meanwhile, the rear-stage power supply conversion circuit is designed to be a high-voltage-resistant input power supply circuit and a high-voltage-resistant capacitor for power supply. All parts make this power module have anti long-time power down function under the combined action.
The invention boosts the voltage of the energy storage capacitor used in the prior art, so that the energy storage capacitor with smaller capacity can store more energy. The power supply conversion circuit is adjusted to enable the power supply module to work in a higher voltage state, the size of the power-down-resistant power supply module is reduced under the combined action of the power supply conversion circuit and the power supply module, and the power-down-resistant time is longer.
As shown in fig. 3. Further, the device also comprises a storage battery and/or a rectifier; the voltage input signal is electrically connected with the storage battery and/or the rectifier; when the voltage input signal is from the rectifier;
the functional circuit optimizes the design of elements by carrying out new control logic on the rectifier, reduces the input loss by more than 50 times, and increases the passable current from 5A to 45A, thereby greatly improving the application range of the functional circuit.
The rectifier comprises two input voltages connected in parallel, a comparator, a first total MOS (metal oxide semiconductor) tube, a second total MOS tube, a first optical coupler, a second optical coupler, a parallel first partial MOS tube group and a parallel second partial MOS tube group;
the output end of each of the two parallel input voltages is electrically connected with the corresponding input end of the comparator;
the other output end of the first path of input voltage is electrically connected with the input end of the parallel first branch MOS tube group;
the other output end of the second path of input voltage is electrically connected with the input end of the parallel second shunt MOS tube group;
the two output ends of the comparator are respectively and electrically connected with the corresponding total MOS tube, the output end of the first total MOS tube is electrically connected with a first optical coupler, the output end of the second total MOS tube is electrically connected with a second optical coupler, and the first optical coupler is electrically connected with a first sub MOS tube group in parallel;
the output end of the second total MOS tube is electrically connected with a second optical coupler, and the second optical coupler is electrically connected with a second partial MOS tube group in parallel;
at least two paths of input voltages of the rectifier are compared through a comparator respectively, the comparator controls one path with higher voltage to act, a total MOS (metal oxide semiconductor) tube on a control path is controlled to be opened through an optical coupler, and the input of the path is conducted.
The invention can greatly reduce conduction loss, generate less heat and improve over-current capability by utilizing the characteristic of low conduction impedance of the MOS tube.
The invention adopts a novel control circuit, replaces the rectifier tube used in the prior proposal with an MOS tube and adds a control logic circuit, increases the sensitivity of input switching, utilizes the characteristic of MOS low on-resistance, reduces the on-loss and greatly enhances the over-current capability.
The input selection circuit can greatly reduce conduction loss, reduce heating and improve overcurrent capacity by optimizing circuit design, and is suitable for application occasions of high-power supplies.
The present invention has been fully described for a clear disclosure and is not to be considered as an exemplification of the prior art.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; it is obvious as a person skilled in the art to combine several aspects of the invention. And such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
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