DC-DC boost conversion device and its working method for boost conversion
A DC-DC, boost conversion technology, used in output power conversion devices, DC power input to DC power output, instruments and other directions, can solve the problem of damage to the energy storage inductor L and DC power supply, affecting the stability of DC output voltage and accuracy requirements, load Rout changes and other issues
Inactive Publication Date: 2016-01-13
CHANGZHOU COLLEGE OF INFORMATION TECH
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Problems solved by technology
[0005] The boost conversion device and its method with the above structure have certain disadvantages: First, due to the dynamic and nonlinear parameter changes of the components in the boost conversion device, the nonlinear changes caused by the switching action, and the change of the load Rout, the DC output will be affected. Voltage Stability and Accuracy Requirements
Second, because the signal that controls the switch tube M to turn on and off causes overcurrent in some cases, such as the PWM wave that controls the switch tube M to turn on and off causes overcurrent because the control switch tube M is in a state of being kept on. , will damage the energy storage inductor L and the DC power supply Uin in the switch tube M and its related circuits
Method used
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[0030] The present invention will be further described below in conjunction with the accompanying drawings and given embodiments, but is not limited thereto.
[0031] Such as figure 1 , 2 As shown, a DC-DC step-up conversion device,
[0032] Including boost conversion circuit 1, sampling circuit 2, PWM generation circuit 3, man-machine interface 4 and drive circuit 5;
[0033] The output end of the boost conversion circuit 1 is electrically connected to the corresponding input end of the sampling circuit 2, the output end of the sampling circuit 2 is electrically connected to the input end of the PWM generation circuit 3, and the output end of the PWM generation circuit 3 is connected to the drive circuit 5. The input end is electrically connected, the output end of the drive circuit 5 is electrically connected to the input end of the boost conversion circuit 1, and the man-machine interface 4 is connected to the PWM generation circuit 3 in communication;
[0034]The boost...
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The invention relates to a DC-DC step-up conversion device, comprising a step-up conversion circuit, a sampling circuit, a PWM generation circuit, a man-machine interface and a drive circuit; the step-up conversion circuit is electrically connected to the sampling circuit, and the sampling circuit is electrically connected to the PWM generation circuit. connection, the PWM generation circuit is electrically connected to the drive circuit, the drive circuit is electrically connected to the boost conversion circuit, and the man-machine interface is connected to the PWM generation circuit in communication; the boost conversion circuit includes a filter circuit, a first sampling circuit, a first Energy storage circuit, first and second switch circuits, second energy storage circuit and second sampling circuit. The DC-DC step-up conversion method of the present invention obtains the current of the first energy storage circuit and the voltage of the second energy storage circuit through real-time sampling, automatically adjusts the duty cycle of the PWM wave generated by the PWM generation circuit by means of state feedback, and controls the first , The conduction and cut-off of the second switch circuit. The invention has the advantages of being able to ensure the stability and precision of the output voltage.
Description
technical field [0001] The invention relates to a boost conversion device and a method thereof, in particular to a DC-DC boost conversion device for DC-DC and a boost conversion method thereof. Background technique [0002] The DC-DC step-up conversion device of the present invention relates to a device capable of realizing DC input and DC output, and the output DC voltage is higher than the input DC voltage. [0003] The DC-DC step-up conversion method in the prior art realizes energy storage for the energy storage inductor L and the energy storage capacitor C by controlling the on and off of the switch tube M, and realizes supplying electric energy to the load Rout. [0004] The prior art DC-DC boost conversion device includes an energy storage inductor L, a switch tube M, a diode D and an energy storage capacitor C (such as image 3 As shown), when in use, the positive pole of the DC power supply Uin is electrically connected to one end of the energy storage inductor L, t...
Claims
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IPC IPC(8): H02M3/156
Inventor 姚立波杨晓云江笑文
Owner CHANGZHOU COLLEGE OF INFORMATION TECH