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Polyphase type voltage conversion system

A technology of voltage conversion and conversion system, which is applied in the direction of conversion equipment without intermediate conversion to AC, and can solve the problems affecting the load performance of the multi-phase DC voltage conversion system and the inconsistency of current magnitude

Active Publication Date: 2014-05-21
浙江杭海新城控股集团有限公司
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  • Description
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AI Technical Summary

Problems solved by technology

[0003] However, in the existing multi-phase DC voltage conversion system, the value of the inductance of the voltage conversion units of each phase is often different, which leads to the inconsistency of the current output by the voltage conversion units of each phase, which affects the multi-phase DC voltage conversion. The performance of the system under load

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  • Polyphase type voltage conversion system

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Embodiment Construction

[0011] see figure 1 , the multi-phase voltage conversion system 10 of the preferred embodiment of the present invention includes a plurality of voltage conversion units 11 , a PWM controller 13 , a plurality of voltage detection units 15 and an input power source 17 . In this embodiment, figure 1 Only two voltage conversion units 11 and two voltage detection units 15 are shown in the figure to illustrate the present invention.

[0012] Each voltage conversion unit 11 includes a switch 111 and an inductor 113 . The input power source 17 is electrically connected to the inductor 113 through the switching switch 111 , and the switching of the switching switch 111 makes the inductor 113 alternately charge and discharge, and finally outputs the converted DC current and DC voltage through the inductor 113 . The DC current and the DC voltage output by the multiple voltage conversion units 11 jointly drive the load.

[0013] The PWM controller 13 is electrically connected to the sw...

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Abstract

Disclosed is a polyphase type voltage conversion system. The polyphase type voltage conversion system comprises an input power supply, multiple voltage conversion units, a pulse-width modulation controller and multiple voltage detection units. The pulse-width modulation controller is used for outputting multiple pulse-width modulation signals with different phases; each voltage conversion unit comprises a diverter switch and an inductor; each voltage detection unit comprises a sampling switch which synchronizes switching with the diverter switch, and a voltage detector electrically connected with the pulse-width modulation controller; each voltage detector is electrically connected with one corresponding inductor through the sampling switch for detecting the voltage value of the corresponding inductor and outputting the voltage value to the pulse-width modulation controller; and the pulse-width modulation controller is also used for calculating an average value of received voltage values, comparing each voltage value respectively with the voltage average value, and correspondingly adjusting the duty ratio of a pulse-width modulation signal outputted to a corresponding voltage conversion unit according to a comparison result.

Description

technical field [0001] The invention relates to a voltage conversion system, in particular to a multi-phase voltage conversion system. Background technique [0002] A multi-phase DC voltage conversion system generally includes a pulse width modulation (Pulse Width Modulation, PWM) controller and multiple voltage conversion units. Each phase voltage conversion unit includes a switching switch and an inductor. The switching switch is electrically connected to the PWM controller, the inductor and an input power. The energy of the input power is stored in the inductance through the switching of the switch, and the converted DC current and voltage are output through the inductance. The PWM controller is used to output a plurality of PWM signals to respectively control the switching frequency of the switches of the multiple voltage conversion units, so that the magnitude of the direct current output by the inductor of each voltage conversion unit can be adjusted accordingly. ...

Claims

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Application Information

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IPC IPC(8): H02M3/04
Inventor 范源勇
Owner 浙江杭海新城控股集团有限公司
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