CN202586748U

CN202586748U - Interlaced parallel BOOST converter

Info

Publication number: CN202586748U
Application number: CN 201220067744
Authority: CN
Inventors: 王晓伟; 朱石磊; 李红敏
Original assignee: HENAN TIANCHUANG NEW ENERGY EQUIPMENT CO Ltd
Current assignee: HENAN TIANCHUANG NEW ENERGY EQUIPMENT CO Ltd
Priority date: 2012-02-28
Filing date: 2012-02-28
Publication date: 2012-12-05
Anticipated expiration: 2022-02-28

Abstract

The utility model discloses an interlaced parallel BOOST converter, which is composed of a two-phase circuit. One phase circuit is composed of a power supply V positive end, an inductor L1, a capacitor C1, a diode D1, a load R and a power supply V negative end which are successively connected in series, wherein a capacitor C2 is in parallel connection with the load R, one end of a switch tube S1 is arranged between the inductor L1 and the capacitor C1, and the other end of the switch tube S1 is connected with the power supply V negative end; in the other phase circuit, the power supply V positive end, and the inductor L2, and a diode D2 are successively connected and are then connected between the capacitor C1 and the diode D1, wherein one end of a switch tube S2 is arranged between the inductor L2 and the diode D2, and the other end of the switch tube S2 is connected with the power supply V negative end. According to the utility model, the voltage gain is high, so that the converter can be applied to occasions with low-voltage input and high-voltage output; the voltage stresses of switch components are low, so that switch components with low voltage resistance and high performance can be selected in the circuits to reduce loss of the circuits; and when the duty ratio is greater than or equals to 0.5, currents and inductances in each phase can be automatically equalized because of functions of the switch capacitor C1.

Description

A kind of crisscross parallel BOOST converter

Technical field

The utility model relates to a kind of converters, especially a kind of crisscross parallel BOOST converter.

Background technology

The use of fossil fuel not only can make global warming; And can produce a series of environmental problems such as air pollution, ozone-depleting, acid rain, water power will flood a large amount of soils, might cause environmental destruction; And in a single day large reservoir breakdown, and consequence is with hardly imaginable.Emerging energies such as solar energy because contain abundant, do not pollute, do not influence advantage such as environment and received and paying close attention to widely; But owing to reasons such as single operational potential is lower need a kind of voltage gain height, wide input voltage range, booster converter that the input current ripple is little; Traditional crisscross parallel BOOST converter is owing to have defectives such as voltage gain is low, switching device voltage stress height; Be not suitable for being applied to the low pressure input, the occasion of high pressure output.

The utility model content

The purpose of the utility model is that a kind of crisscross parallel BOOST converter will be provided; Compare with traditional B OOST converter; Under identical duty ratio, realized high voltage gain; The voltage stress that has also reduced switching device simultaneously particularly when converter is operated in duty ratio 0.5≤D＜1, also has the ability of each phase inductance electric current of automatic equalization.

For achieving the above object; The utility model is made up of quarter-phase circuit; One circuitry phase is in series by power supply V anode, inductance L 1, capacitor C 1, diode D1, load R and power supply V negative terminal successively; Wherein capacitor C 2 is parallelly connected with load R, and switching tube S1 one end places between inductance L 1 and the capacitor C 1, and an end connects power supply V negative terminal; Another circuitry phase is linked to each other between back access capacitor C 1 and the diode D1 by power supply V anode, inductance L 2, diode D2 successively, and wherein switching tube S2 one end places between inductance L 2 and the diode D2, and an end connects power supply V negative terminal.

The advantage of the utility model is:

1, voltage gain is high, is fit to very much be applied to the occasion of low pressure input high pressure output.

2, the voltage stress of switching device is low, is very beneficial for circuit and selects low withstand voltage, high performance switching device to reduce the loss of circuit.

3, when duty ratio more than or equal to 0.5 the time because the effect of switching capacity C1, can each phase inductance electric current of automatic equalization.

Description of drawings

Fig. 1 is the circuit diagram of the crisscross parallel BOOST converter of the utility model.

Embodiment

The utility model crisscross parallel BOOST converter is made up of quarter-phase circuit; One circuitry phase is in series by power supply V anode, inductance L 1, capacitor C 1, diode D1, load R and power supply V negative terminal successively; Wherein capacitor C 2 is parallelly connected with load R; Switching tube S1 one end places between inductance L 1 and the capacitor C 1, and an end connects power supply V negative terminal; Another circuitry phase is linked to each other between back access capacitor C 1 and the diode D1 by power supply V anode, inductance L 2, diode D2 successively, and wherein switching tube S2 one end places between inductance L 2 and the diode D2, and an end connects power supply V negative terminal.

Fig. 1 is the crisscross parallel BOOST converter circuit figure of the utility model; When duty ratio 0＜D＜0.5; Circuit working is under continuous conduction mode; Switching tube S1 and S2 adopt phase shifting control and both drive signals staggered 180 ° in 1 switch periods Ts circuit 4 kinds of switch mode are arranged, be called mode a mode b mode c mode d respectively, its switch mode mark sheet is as shown in table 1.

Table 1

When duty ratio was 0.5≤D＜1, circuit also had 4 kinds of switch mode in a switch periods Ts, and its switch mode mark sheet is as shown in table 2.

Table 2

According to the weber balance principle and the ampere-second balance principle of capacitor C 1, C2 of inductance L 1, L2, when duty ratio was operated in 0.5≤D＜1, in a switch periods, mode a: the discharging current of switching capacity C1 was the electric current of inductance L 1; Mode c: the charging current of switching capacity C1 is the electric current of inductance L 2; Mode b, d: the voltage on the switching capacity C1 remains unchanged and supposes IL2＞IL1; Then can cause switching capacity C1 to discharge and recharge imbalance; Voltage on it constantly increases, when not meeting stable state electric capacity ampere-second equilibrium principle therefore, the electric current on last 2 inductance is with automatic equalization.When 0＜D＜0.5 and 0.5≤D＜1, circuit has all obtained high voltage gain, and the voltage stress of the most of switching device of circuit is low.

Claims

1. crisscross parallel BOOST converter; It is characterized in that: described crisscross parallel BOOST converter is made up of quarter-phase circuit; One circuitry phase is in series by power supply V anode, inductance L 1, capacitor C 1, diode D1, load R and power supply V negative terminal successively; Wherein capacitor C 2 is parallelly connected with load R, and switching tube S1 one end places between inductance L 1 and the capacitor C 1, and an end connects power supply V negative terminal; Another circuitry phase is linked to each other between back access capacitor C 1 and the diode D1 by power supply V anode, inductance L 2, diode D2 successively, and wherein switching tube S2 one end places between inductance L 2 and the diode D2, and an end connects power supply V negative terminal.