Direct current-direct current converter

A technology of DC converters and transformers, which is applied in the direction of converting DC power input to DC power output, instruments, and adjusting electrical variables, etc. It can solve problems such as poor stability and narrow application range, so as to improve the accuracy of voltage regulation and ensure the demand for electricity. Effect

Inactive Publication Date: 2018-07-06
河南北瑞电子科技有限公司
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Problems solved by technology

The DC-DC converter mainly adopts high-frequency power conversion technology, that is, the DC voltage is converted into a high-frequency switching voltage through a power switching device, and the input and output are completely isolated. The output voltage is realized by a PWM modulation system. By adjusting the output Th

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  • Direct current-direct current converter

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Embodiment Construction

[0011] The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0012] Such as figure 1 As shown, a DC-DC converter according to the present invention includes a pulse width modulation module, a switch tube and a voltage regulation module. The output end of the pulse width modulation module is connected to the voltage regulation module through a switch tube, and the input DC voltage is passed The pulse width modulation module drives the on-off of the switch tube, generates a square wave voltage through the on-off of the switch tube, and obtains the required voltage after ...

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Abstract

The invention discloses a direct current-direct current converter comprising a pulse width modulation module, a switching tube and a voltage regulation module. The output end of the pulse width modulation module is connected to the voltage regulation module via a switch tube. An inputted direct-current voltage passes through the pulse width modulation module to drive connection or disconnection ofthe switching tube; a square-wave voltage is generated based on the connection or disconnection of the switching tube; and the voltage regulation module carries out voltage regulation to obtain a needed voltage. The pulse width modulation module employs a pulse width modulator; and the output terminal of the pulse width modulator is connected with the switching tube. The voltage regulation moduleconsists of a transformer and a filter circuit. According to the invention, stable outputting of two paths of voltages is realized and the two paths of load capacities can be adjusted, so that the voltage regulation precision is improved substantially and the electricity consumption need of the load is ensured.

Description

technical field [0001] The invention relates to the field of electronic equipment, in particular to a DC-DC converter. Background technique [0002] The DC-DC converter converts a fixed DC voltage into a variable DC voltage, and is widely used in the stepless speed change and control of trolleybuses, subways and trains, making the above control have the advantages of smooth acceleration and fast response. The DC-DC converter mainly adopts high-frequency power conversion technology, that is, the DC voltage is converted into a high-frequency switching voltage through a power switching device, and the input and output are completely isolated. The output voltage is realized by a PWM modulation system. By adjusting the output The duty cycle of the waveform is used to adjust the size of the output DC voltage. The traditional PWM modulation system takes the sampling signal from the main winding as a feedback signal to modulate the output. This adjustment method has poor stability a...

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Application Information

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IPC IPC(8): H02M3/335
CPCH02M3/33569H02M3/33507
Inventor 常胜
Owner 河南北瑞电子科技有限公司
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