阅读说明：本技术 一个相断开或短路时操作基于矩阵转换器的整流器的装置和方法 (One device and method for mutually disconnecting or operating the rectifier based on matrix converter when short-circuit ) 是由 贾汉吉尔·阿夫什阿里安 龚冰 许德伟 于 2018-03-29 设计创作，主要内容包括：一种电源电路,包括：矩阵转换器,将第一输入交流(AC)相至第三输入交流(AC)相转换成单个初相；变压器,包括电连接到单个初相的初级侧；整流器,电连接到变压器的次级侧；以及输出电压端子,电连接到整流器。矩阵转换器包括第一双向开关对至第六双向开关对,并且第一双向开关对至第六双向开关对中的每个双向开关对包括第一单向开关和第二单向开关。当第三输入AC相断开或短路时,第二双向开关对和第五双向开关对关断；并且在第一双向开关对、第三双向开关对、第四双向开关对和第六双向开关对中的每个双向开关对中,第一单向开关和第二单向开关中的一个单向开关导通,第二单向开关和第一单向开关中的另个单向开关作为全桥相移转换器操作。(A kind of power circuit, comprising: the first input AC (AC) is mutually mutually converted into single first phase to third input AC (AC) by matrix converter；Transformer, the primary side including being electrically connected to single first phase；Rectifier is electrically connected to the primary side of transformer；And output voltage terminal, it is electrically connected to rectifier.Matrix converter includes the first two-way switch to the 6th two-way switch pair, and the first two-way switch to each two-way switch to the 6th two-way switch centering to including the first single-way switch and the second single-way switch.When third input AC phase disconnect or short circuit when, the second two-way switch to and the 5th two-way switch to shutdown；And the first two-way switch to, third two-way switch to, the 4th two-way switch to and the 6th two-way switch pair in each two-way switch pair in, a single-way switch in first single-way switch and the second single-way switch is connected, and the another single-way switch in the second single-way switch and the first single-way switch is as full-bridge phase-shift converters operation.)

1. a kind of power circuit, comprising:

First input AC AC phase, the second input AC phase are converted into single first phase with third input AC phase by matrix converter；

Transformer, the primary side including being electrically connected to the single first phase；

Rectifier is electrically connected to the primary side of the transformer；And

Output voltage terminal is electrically connected to the rectifier；Wherein

The matrix converter includes the first two-way switch to the 6th two-way switch pair；

First two-way switch is to each two-way switch to the 6th two-way switch centering to including the first single-way switch With the second single-way switch；

The first end of first two-way switch pair, the first end of the third two-way switch pair and the 5th two-way switch pair First end link together, to provide positive voltage node；

The first end of second two-way switch pair, the first end of the 4th two-way switch pair and the 6th two-way switch pair First end link together, to provide negative voltage node；

The second end of first two-way switch pair and the second end of the 4th two-way switch pair are connected respectively to described first Input AC phase；

The second end of the third two-way switch pair and the second end of the 6th two-way switch pair are connected respectively to described second Input AC phase；

The second end of 5th two-way switch pair and the second end of second two-way switch pair are connected respectively to the third Input AC phase；And

When third input AC phase disconnects or is short-circuit:

Second two-way switch to the 5th two-way switch to shutdown；

First two-way switch to, the third two-way switch to, the 4th two-way switch to it is the described 6th two-way Switch each two-way switch centering of centering:

Single-way switch conducting in first single-way switch and second single-way switch, and

Another single-way switch in second single-way switch and first single-way switch is grasped as full-bridge phase-shift converter Make.

2. power circuit according to claim 1, wherein first two-way switch is to extremely the 6th two-way switch pair In each two-way switch pair first single-way switch and second single-way switch be connected electrically in series with each other.

3. power circuit according to claim 2, wherein first two-way switch is to extremely the 6th two-way switch pair In each two-way switch pair first single-way switch and second single-way switch be metal oxide semiconductcor field effect Answer transistor.

4. power circuit according to claim 1, in which:

First two-way switch is connected to the 6th two-way switch to identical first conduction duration；And

The third two-way switch is connected to the 4th two-way switch to identical second conduction duration.

5. power circuit according to claim 1, in which:

It is greater than the interim of the second input AC phase in the first input AC phase:

First single-way switch of first two-way switch pair and described the second of the third two-way switch pair unidirectionally open It closes and is operated as complementary switch；And

Second single-way switch of 4th two-way switch pair and described the first of the 6th two-way switch pair unidirectionally open It closes and is operated as complementary switch.

6. power circuit according to claim 1, wherein be greater than the second input AC phase in the first input AC phase Interim, described the first of second single-way switch of first two-way switch pair, the third two-way switch pair Second list of single-way switch, first single-way switch of the 4th two-way switch pair and the 6th two-way switch pair It is all turned on to switch.

7. power circuit according to claim 1, wherein be greater than the second input AC phase in the first input AC phase Interim, control second single-way switch of first two-way switch pair, the third two-way switch pair it is described Described the of first single-way switch, first single-way switch of the 4th two-way switch pair and the 6th two-way switch pair Two single-way switch, to provide synchronous rectification.

8. power circuit according to claim 1, in which:

It is less than the interim of the second input AC phase in the first input AC phase:

Second single-way switch of first two-way switch pair and described the first of the third two-way switch pair unidirectionally open It closes and is operated as complementary switch；And

First single-way switch of 4th two-way switch pair and described the second of the 6th two-way switch pair unidirectionally open It closes and is operated as complementary switch.

9. power circuit according to claim 1, wherein be less than the second input AC phase in the first input AC phase Interim, described the second of first single-way switch of first two-way switch pair, the third two-way switch pair First list of single-way switch, second single-way switch of the 4th two-way switch pair and the 6th two-way switch pair It is all turned on to switch.

10. power circuit according to claim 1, wherein be less than the second input AC in the first input AC phase The interim of phase controls first single-way switch of first two-way switch pair, the institute of the third two-way switch pair State the described of the second single-way switch, second single-way switch of the 4th two-way switch pair and the 6th two-way switch pair First single-way switch, to provide synchronous rectification.

11. power circuit according to claim 1, wherein the first two-way switch described in turn-on and turn-off is to described the Six two-way switch pair, to adjust the output-voltage levels of the output voltage terminal.

12. power circuit according to claim 9 further includes controller, the controller be microcontroller, processor, Field programmable gate array or Complex Programmable Logic Devices.

13. power circuit according to claim 1, wherein the matrix converter is buck converter.

14. power circuit according to claim 1, wherein the rectifier includes four diodes for being arranged to electric bridge.

15. power circuit according to claim 1 further includes output filter, the output filter is electrically connected to institute State the output end of rectifier.

16. power circuit according to claim 15, wherein the output filter includes output inductor and output electricity Container.

17. power circuit according to claim 1 further includes input filter, the input filter is electrically connected to institute State each input AC phase in the first input AC phase, the second input AC phase and third input AC phase.

Technical field

The present invention relates to matrix converters.More particularly it relates to work as an input Xiang Yuyuan of matrix rectifier Disconnect or when ground short circuit with source polyphase matrix rectifier operation.

Background technique

The power supply for being commonly used for telecommunications and high voltage direct current (HVDC) system uses the dual stage process of standard.The two ranks Section includes front-end power factor correcting (PFC) rectifier and isolated DC to direct current (DC-DC) converter.However, for Three-phase input, single phase, isolated matrix type rectifier was advantageous in terms of high power density and high efficiency.In general, single phase Isolated matrix type rectifier can be equipped with three-phase to a phase matrix converter, which will directly input AC voltage Mains frequency is converted into high-frequency AC voltage, which is supplied to the high-frequency isolation transformer with secondary voltage, so After be rectified into desired DC output voltage.The design of matrix rectifier may be challenging, because of PFC and isolated DC- DC conversion must be performed simultaneously within the scope of and inputting line voltage upper in entire load.

When using matrix rectifier, due to lacking intermediate storage energy and being generally designed to low tolerances output voltage tune The second stage DC-DC converter of section, therefore when three one inputted in phases mutually disconnect or when short-circuit (ground short circuit with source), It is difficult to keep output voltage and is difficult to convey continuous power.

Summary of the invention

The preferred embodiment of the present invention provides a kind of matrix rectifier, when an input mutually disconnects or is short-circuit, the matrix Rectifier can operate continuously DC-DC converter, output loading is conveyed to by about 2/3rds of general power, due to phase It moves caused by operating and is operated under the conditions of zero voltage switching (ZVS), and/or keep output voltage.

The power circuit of preferred embodiment in accordance with the present invention includes: matrix converter, by the first input AC (AC) Phase, the second input AC phase are converted into single first phase with third input AC phase；Transformer, the primary including being electrically connected to single first phase Side；Rectifier is electrically connected to the primary side of transformer；And output voltage terminal, it is electrically connected to rectifier.Matrix converter packet The first two-way switch is included to the 6th two-way switch pair, and the first two-way switch is to double to each of the 6th two-way switch centering To switch to including the first single-way switch and the second single-way switch.The first end of first two-way switch pair, third two-way switch pair First end and the first end of the 5th two-way switch pair link together, to provide positive voltage node.Second two-way switch pair The first end of first end, the first end of the 4th two-way switch pair and the 6th two-way switch pair links together, to provide negative voltage Node.The second end of first two-way switch pair and the second end of the 4th two-way switch pair are connected respectively to the first input AC phase, the The second end of three two-way switch pair and the second end of the 6th two-way switch pair are connected respectively to the second input AC phase, the 5th two-way opened The second end of pass pair and the second end of the second two-way switch pair are connected respectively to third input AC phase.When third input AC phase disconnects Or when short circuit, the second two-way switch to and the 5th two-way switch to shutdown, and in the first two-way switch to, third two-way switch To, the 4th two-way switch to and the 6th two-way switch centering each two-way switch centering, the first single-way switch and second unidirectional Single-way switch conducting in switch and another single-way switch conduct in the second single-way switch and the first single-way switch Full-bridge phase-shift converters operation.

Preferably, first single-way switch of first two-way switch to each two-way switch pair to the 6th two-way switch centering It is connected electrically in series with each other with the second single-way switch.Preferably, the first two-way switch is to each of to the 6th two-way switch centering The first single-way switch and the second single-way switch of two-way switch pair are Metal Oxide Semiconductor Field Effect Transistor.

Preferably, the first two-way switch to and the 6th two-way switch to identical first conduction duration conducting, and And third two-way switch to and the 4th two-way switch to identical second conduction duration conducting.

Preferably, it is greater than interim of the second input AC phase in the first input AC phase, the first of the first two-way switch pair Second single-way switch of single-way switch and third two-way switch pair is operated as complementary switch；And the of the 4th two-way switch pair First single-way switch of two single-way switch and the 6th two-way switch pair is operated as complementary switch.

Preferably, it is greater than interim of the second input AC phase in the first input AC phase, the second of the first two-way switch pair Single-way switch, the first single-way switch of third two-way switch pair, the first single-way switch of the 4th two-way switch pair and the 6th are two-way Second single-way switch of switch pair all turns on.

Preferably, the interim of the second input AC phase is greater than in the first input AC phase, the first two-way switch pair of control Second single-way switch, the first single-way switch of third two-way switch pair, the 4th two-way switch pair the first single-way switch and the 6th Second single-way switch of two-way switch pair, to provide synchronous rectification.

Preferably, first input AC phase less than second input AC phase interim, the second of the first two-way switch pair First single-way switch of single-way switch and third two-way switch pair is operated as complementary switch, and the of the 4th two-way switch pair Second single-way switch of one single-way switch and the 6th two-way switch pair is operated as complementary switch.

Preferably, first input AC phase less than second input AC phase interim, the first of the first two-way switch pair Single-way switch, the second single-way switch of third two-way switch pair, the second single-way switch of the 4th two-way switch pair and the 6th are two-way First single-way switch of switch pair all turns on.

Preferably, in interim of the first input AC phase less than the second input AC phase, the first two-way switch pair is controlled First single-way switch, the second single-way switch of third two-way switch pair, the 4th two-way switch pair the second single-way switch and the 6th First single-way switch of two-way switch pair, to provide synchronous rectification.

Preferably, the first two-way switch of turn-on and turn-off is to the 6th two-way switch pair, to adjust output voltage terminal Output-voltage levels.Preferably, power circuit includes controller, which is microcontroller, processor, field programmable gate Array or Complex Programmable Logic Devices.

Preferably, matrix converter is buck converter.

Preferably, rectifier includes four diodes for being arranged to electric bridge.

Preferably, power circuit includes output filter, which is electrically connected to the output end of rectifier.It is preferred that Ground, output filter include output inductor and output capacitor.

Power circuit includes input filter, which is electrically connected to the first input AC phase, the second input AC phase With each input AC phase in third input AC phase.

According to below with reference to the accompanying drawings detailed description of the preferred embodiment, above-mentioned and other elements of the invention, feature, Step, characteristics and advantages will become more apparent from.

Detailed description of the invention

Fig. 1 shows the circuit diagram of isolated matrix rectifier.

Fig. 2 shows the waveforms of the three-phase input voltage of matrix rectifier.

Fig. 3 A and Fig. 3 B show the figure of zero-voltage switching full-bridge DC-DC converter.

Fig. 4 A is shown in which a mutually waveform for disconnection or short-circuit matrix converter with Fig. 4 B.

Fig. 5 A and Fig. 5 B were shown in different separately periods, one of mutually matrix converter of disconnection or short circuit Equivalent circuit diagram.

Fig. 6 A and Fig. 6 B show the switch gate signal during switching the period.

Fig. 7 is shown in which the exemplary waveforms of the matrix rectifier of a phase short circuit.

Specific embodiment

The preferred embodiment of the present invention is described below with reference to the accompanying drawings.

It should be noted that exemplary being merely to illustrate property of the preferred embodiment purpose that following presentation is of the invention, and this hair It is bright to be not limited to content disclosed in preferred embodiment below.The content disclosed in different preferred embodiments can answered actually It is intended to be included within the scope of the present invention with the preferred embodiment of middle combination with one another, and modification under those circumstances.Attached drawing is used Preferred embodiment is understood in auxiliary, and they are not always proper accurate Drawing.In some cases, for example, In the size ratio and description of size ratio or the distance between elements or features between constituent element itself shown in attached drawing Described size is than mismatching.In addition, some elements or features explained in the de-scription are omitted from attached drawing, or according to Concrete condition is shown them with the quantity of reduction.

The preferred embodiment of the present invention improves the operation of the matrix rectifier when an input mutually disconnects or short circuit.It is as follows It is described, if an input mutually disconnects, handover scheme and control program operation matrix rectifier, continuously to convey power To load.

Fig. 1 is the electricity for showing the topological structure that can be used as the three-phase of the preferred embodiment of the present invention to a phase matrix rectifier Lu Tu.However, the preferred embodiment of the present invention is not limited to circuit shown in FIG. 1, and other rectifiers and/or electricity can be used Road topological structure.

Matrix rectifier shown in FIG. 1 includes connecting the three-phase of rectifier to a phase matrix converter.In Fig. 1, " route Side " or " primary side " are referred in transformer T_rThe circuit part of left-hand side is connected to the line of each phase in three phases A, B, C Voltage ν_a、v_b、v_c；" load-side " or " primary side " is referred in transformer T_rThe circuit part of right-hand side, is connected to output voltage V_o, that is, load.In line side, three-phase alternating current (AC) is combined into single phase AC power to a phase matrix converter by three-phase Stream, the three-phase to a phase matrix converter includes two-way switch to S₁₁To S₁₆And S₂₁To S₂₆.In load-side, pass through rectifier pair Single phase AC current is rectified, which includes diode D₁To D₄, to provide DC electric current.Transformer T_rLeakage inductance by Fig. 1 In L_lkIt indicates.

The isolated matrix rectifier of Fig. 1 includes: filter inductor L_fWith filter condenser C_f, define line side filtering Device, the route side filter reduce total harmonic distortion (THD)；Two-way switch is to S₁₁To S₁₆And S₂₁To S₂₆It is arranged to electric bridge, as Three-phase is to a phase matrix converter；Transformer T_r, the high_voltage isolation between line-side circuitry and load side electrical circuitry is provided；Four Diode D₁To D₄, it is arranged to electric bridge, to provide output rectification；And output inductor L_oWith output capacitor C_o, define defeated Voltage V out_oLoad side filter.Two-way switch is to S₁₁To S₁₆And S₂₁To S₂₆Arrange and be used in pairs the isolated square of Fig. 1 In battle array rectifier, with operation electric current path.As shown in Figure 1, two-way switch is to S₁₁To S₁₆And S₂₁To S₂₆It is connected in parallel including six Duis Single-way switch.

As shown in Figure 1, matrix rectifier preferably includes two stages: (1) three-phase is to a phase matrix converter, and (2) diode rectifier.It is alternatively possible to higher efficiency be realized using synchronous rectification, with switch generation in synchronous rectification For diode.The matrix converter and diode rectifier are by high frequency transformer T_rIsolation.

The controller turn-on and turn-off two-way switch of matrix rectifier is to S₁₁To S₁₆And S₂₁To S₂₆, to generate output voltage V_oExpectation voltage level.The controller can by microcontroller, processor, field programmable gate array (FPGA), complexity Programmed logic device (CPLD) etc. is realized.

Preferably, for example, the matrix rectifier for being used as the preferred embodiment of the present invention includes: the first phase, the second phase and third Phase；And single-way switch S_ij, wherein i=1,2 and j=1,2,3,4,5,6, and wherein, single-way switch S_1jAnd S_2jIt is connected to Together to define six two-way switch pair.

First two-way switch is to S₁₁、S₂₁First end, third two-way switch is to S₁₃、S₂₃First end and the 5th two-way opened It closes to S₁₅、S₂₅First end link together, to provide positive voltage node.Second two-way switch is to S₁₂、S₂₂First end, Four two-way switch are to S₁₄、S₂₄First end and the 6th two-way switch to S₁₆、S₂₆First end link together, to provide negative electricity Press node.First two-way switch is to S₁₁、S₂₁Second end and the 4th two-way switch to S₁₄、S₂₄Second end be connected respectively to One phase voltage v_a.Third two-way switch is to S₁₃、S₂₃Second end and the 6th two-way switch to S₁₆、S₂₆Second end respectively connect To the second phase voltage v_b.5th two-way switch is to S₁₅、S₂₅Second end and the second two-way switch to S₁₂、S₂₂Second end respectively It is connected to third phase voltage v_c。

Fig. 2 shows the waveforms of three input voltage phases of matrix converter shown in FIG. 1.Fig. 2 shows according to the time And it is divided into the input voltage ν of 60 ° of interval I to VI_A、ν_B、ν_COpposite phase.Dash area I with phase angle θ=0 to ± Centered on 30 °.Input voltage ν_A、ν_B、ν_CIn each voltage maximum potential V having the same_m。

As shown in Fig. 2, in input voltage ν_A、ν_B、ν_CTwo continuous zero crossings between any interval I to VI in, three Two voltages in voltage do not change polarity.For example, in the interval I (shadow region) of -30 ° of 30 ° of < θ <, line voltage ν_AB= ν_A-ν_BAnd ν_AC=ν_A-ν_CIt is positive, and ν_ABAnd ν_ACReach its maximum value in the interim.Because matrix converter is cut Frequency is changed much higher than input voltage ν_A、ν_B、ν_CFrequency, so two line voltage ν_AB、ν_ACIt can be considered as slowly varying DC Voltage.

Therefore, the matrix rectifier in the line side of Fig. 1 can be repainted as two equivalent full-bridge phase-shifts (FB-PS) Converter, as shown in Figure 3A.Fig. 3 A, which is shown, as shown in Figure 1 is connected to input voltage ν_A、ν_B、ν_CWith voltage input node Various switches pair.

60 ° of intervals I each of shown in Fig. 2 is into IV, in the three-phase with ceiling voltage current potential or minimum voltage current potential A phase it is shared by " electric bridge x " and " electric bridge y ".For example, as shown in Figure 3A, in the I of interval, phase A has ceiling voltage current potential ν_A, and phase A is shared in " electric bridge x " and " electric bridge y ".

Fig. 3 B is shown in which the equivalent full-bridge FB-PS converter of phase C disconnection or short circuit.In figure 3b, " electric bridge y " etc. The dotted line connection instruction for imitating circuit has input voltage ν_CPhase C disconnect.Therefore, remaining equivalent circuit is used " electric bridge x " and defeated Enter voltage ν_AAnd ν_BOperation, but do not have to input voltage ν_COperation.

Fig. 4 A is shown in which a mutually waveform for disconnection or short-circuit matrix converter with Fig. 4 B.Fig. 4 A shows and schemes The similar waveform of waveform shown in 2.However, in Figure 4 A, the dotted line of input phase C indicates input voltage ν_CIt is to disconnect.

Fig. 4 B shows the waveform in an input line period, including the pulse width modulated when mutually disconnecting or being short-circuit for one (PWM) the switching period greatly exaggerated.PWM switching frequency is much higher than line frequency.One input line period may include tens of Or hundreds of PWM periods, depend on switching frequency.Therefore, if greatly exaggerating the switching period not in figure, cannot understand Ground shows ν_PPWM waveform.The each interval being spaced in I-VI for six, only relates to the switch (example for being connected to phase A and phase B Such as, due to input voltage ν_CPhase C disconnect or short circuit), and matrix converter is similarly grasped with single FB-PS converter Make.

With reference to Fig. 4 B, positive voltage pulse ν_PIt is generated by controller, two-way switch is connected with equal turn-on time in controller To S₁₁、S₂₁And S₁₆、S₂₆, create ν_P=ν_ABPositive voltage pulse and amplitude be I_P, from phase A flow into phase B current impulse.In order to Keep transformer T_rBalance of flux, following controller conducting two-way switch is to S₁₄、S₂₄And S₁₃、S₂₃, generate and positive voltage pulse Negative voltage pulse with the identical duration.Regardless of AC transformer electric current, line side electric current keeps identical.When one Phase is (for example, have input voltage ν_CPhase C) disconnect or short circuit when, output voltage ν₀In input voltage ν_ABLower than relative to transformation The ν of device primary side₀When decay because matrix converter is buck converter.In two interval V and II, primary Voltage is lower than the ν relative to transformer primary₀, and primary side is transported to without power.Therefore, can stop to matrix The modulation of converter, to reduce gate loss and other losses.

Fig. 5 A and Fig. 5 B are shown in which the equivalent circuit diagram of the matrix converter of phase C disconnection or short circuit.Such as Fig. 5 A and figure Shown in 5B, it is assumed that phase C disconnect or short circuit, every 60 ° separately in, three phase converer is as FB-PS converters operation.

Fig. 5 A shows the interim in -120 ° of 60 ° of < θ <, as ν in Fig. 2_ABFor timing, i.e., as voltage ν_A> voltage ν_BWhen three phase converer equivalent circuit.Fig. 5 B shows the interim in 60 ° of < -120 ° of < θ, as ν in Fig. 2_ABWhen being negative, I.e. as voltage ν_A< voltage ν_BWhen equivalent circuit.

When an input voltage is unavailable, four two-way switch of six two-way switch centerings are only related to (i.e. 12 Eight in a single-way switch), and the switch for being connected to the input phase C of missing does not operate.As shown in Figure 5A, single-way switch S₁₁、S₂₄、S₂₃、S₁₆The operation during separately -120 ° 60 ° of < θ <.As shown in Figure 5 B, single-way switch S₂₁、S₁₄、S₁₃、S₂₆In Operation during being spaced < -120 ° of 60 ° of < θ.

ZVS is switched, two-way switch is to S₁₁To S₁₆And S₂₁To S₂₆In each two-way switch pair single-way switch it is preferred For such as Metal Oxide Semiconductor Field Effect Transistor (MOSFET).Therefore, operation two-way switch is to S₁₁To S₁₆And S₂₁To S₂₆ In some two-way switch pair, to generate for transformer T_rPositive pulse and negative pulse, and by two-way switch to S₁₁To S₁₆With S₂₁To S₂₆In other two-way switch operated to as synchronous rectification switch, to reduce conduction loss.

For example, in fig. 5, in -120 ° of interval 60 ° of < θ < period, voltage ν_A> voltage ν_B；Therefore, the list of equivalent electric bridge To switch S₁₄、S₂₁、S₁₃And S₂₆It can be held on for synchronous rectification and in interim, this is because these switches Body diode is forward bias.In this interval, remaining four single-way switch S₁₁、S₂₄、S₂₃And S₁₆It is converted with FB-PS Device similarly operates.Fig. 6 A is shown in a switching period T for being spaced -120 ° of 60 ° of < θ <_SPeriod, single-way switch S₁₁、S₁₃、 S₁₄、S₁₆、S₂₁、S₂₃、S₂₄、S₂₆Correspondence switch gate signal.In the bridge circuit shown in Fig. 5 A, single-way switch S₂₄With right side electricity Single-way switch S in road₁₆Complementation, single-way switch S₁₁With the single-way switch S in the circuit of left side₂₃Complementation, to prevent voltage ν_AAnd electricity Press ν_BBetween short circuit.

As another example, in 60 ° of interval < -120 ° of < θ period, voltage ν_A< voltage ν_B.Therefore, as shown in Figure 5 B, single To switch S₂₃、S₁₆、S₁₁And S₂₄It can be held in interim, this is because the body diode of these switches is forward bias It sets.In this interval, remaining four single-way switch S₁₁、S₂₄、S₂₃And S₁₆It is similarly operated with FB-PS converter.As above Described, Fig. 6 B is shown in a switching period T for being spaced 60 ° of < -120 ° of < θ_SPeriod, single-way switch S₁₁、S₁₃、S₁₄、S₁₆、 S₂₁、S₂₃、S₂₄、S₂₆Correspondence switch gate signal.In the bridge circuit shown in Fig. 5 B, single-way switch S₁₄In the circuit of right side Single-way switch S₂₆Complementation, single-way switch S₂₁With the single-way switch S in the circuit of left side₁₃Complementation, to prevent ν_AAnd ν_BBetween short circuit.

Fig. 7 shows the example waveform for indicating the matrix rectifier of the preferred embodiment of the present invention.Fig. 7 shows input electricity Press ν_CWaveform when short-circuit.From top to bottom, waveform is output voltage V_o(channel 3), transformer primary voltage (channel 1) and input Voltage ν_C(channel 2).In time t₁, matrix rectifier operates in a normal operation mode.In time t₂, as input voltage ν_CUnder When dropping to zero, matrix rectifier is switched to failure mode of operation as described above, and output voltage V_oStill adjusting.In the time t₄, input voltage ν_CRestore, matrix rectifier switches back into normal manipulation mode.In input voltage ν_CThe interval for being zero because of short circuit Period, matrix rectifier are able to maintain output voltage V_oAnd power is conveyed to output.

Although the preferred embodiment of the present invention is described above, but it is to be understood that, it is of the invention not departing from In the case where scope and spirit, change and modification will be apparent for a person skilled in the art.Therefore, this hair Bright range is only determined by appended claims.