CN100456616C - Inverter circuit and inverting method thereof - Google Patents
Inverter circuit and inverting method thereof Download PDFInfo
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- CN100456616C CN100456616C CNB2004101008204A CN200410100820A CN100456616C CN 100456616 C CN100456616 C CN 100456616C CN B2004101008204 A CNB2004101008204 A CN B2004101008204A CN 200410100820 A CN200410100820 A CN 200410100820A CN 100456616 C CN100456616 C CN 100456616C
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Abstract
The present invention relates to an inverter circuit and an inverting method thereof. The circuit comprises a charging capacitor, a first switch tube, a first filtering inductor and a second filtering inductor which are tightly coupled, a second switch tube, a third switch tube and a filtering capacitor, wherein the first switch tube is connected between a positive end of the first charging capacitor and an input end of a first filtering inductor; an input end of a second filtering inductor is connected with an output end of the first filtering inductor, and the output end of the second filtering inductor is connected with a negative end of the charging capacitor; one end of a series connection branch of the second switch tube and the third switch tube is connected with the input end of a first filtering inductor, and the other end is connected with an output end of the second filtering inductor; one end of the filtering capacitor is connected with the output end of the first filtering inductor, and the other end is connected with a connecting point of the second switch tube and the third switch tube. Because the circuit of the present invention adopts the filtering inductors which are tightly coupled, output voltage not only can be higher than input voltage but also can be lower than the input voltage only through regulating a duty factor D.
Description
[technical field]
The present invention relates to a kind of inverter circuit and inverse method thereof.
[background technology]
Present inverter circuit has two classes usually: two level modes and three level modes, wherein two level topologys are more common and use extensively.
Shown in Figure 1 is a kind of two level inverse conversion topologys.Producing between sinusoidal wave positive half period, switching tube Q1 work, switching tube Q4 do not work; Producing between sinusoidal wave negative half-cycle, switching tube Q4 work, switching tube Q1 do not work.This topological advantage is that control is simple, and the sine wave output wave distortion is little, and reaction is fast.But the voltage that the switching tube Q1 second end B6 is ordered is positive and negative two level, and this requires the withstand voltage higher of switching tube, must use withstand voltage high switching tube, and the loss of switching tube is also bigger; Again because the PWM ripple harmonic wave of output is abundant, so the filter inductance that requires is bigger.Also require the voltage of input will be higher than the voltage of output simultaneously, could guarantee the waveform of exporting.Frequently, the peak value of input voltage will be higher than about 25% of output voltage.
In order to reduce the withstand voltage and filter inductance of switching tube, on the basis of two level inverse conversion topologys, increased continuous current circuit, form the tri-level inversion topology, shown in Fig. 2,3.Circuit at work the switching tube Q1 second end B6 voltage of ordering by positive and negative two level just becoming, zero, negative three level, make the change in voltage at switching tube two ends relatively little, voltage stress only is original half, switching loss is lacked than two level inverse conversions are topological, and because the PWM ripple harmonic wave of output is little than two level, so filter inductance is little than two level inverse conversion topologys.But existing tri-level inversion topology has following shortcoming: 1. control is complicated, needs the PWM ripple to remove to control four switching tubes.2. Shu Chu sine wave is slower than the sine wave reaction of the topological output of two level inverse conversions.The rate of descent of electric current is relevant with the both end voltage of filter inductance in the filter inductance, i.e. U=L*di/dt.The continuous current circuit of two level inverse conversion topologys is to carry out afterflow by the loop that includes filter capacitor and charging capacitor, and the filter inductance both end voltage is the voltage that the instant voltage of filter capacitor adds the charging capacitor two ends, and current changing rate di/dt is bigger.And the continuous current circuit of tri-level inversion topology only passes through filter capacitor, the obstructed electric capacity that overcharges, so the filter inductance both end voltage is the instant voltage of filter capacitor, current changing rate di/dt is little than two level inverse conversion topologys, and reaction is slow.3. its voltage of also requiring to import will be higher than the voltage of output, could guarantee the waveform of output.
[summary of the invention]
Main purpose of the present invention provides a kind of inverter circuit, can solve the problems of the prior art, and has the advantage of two level inverse conversion topological sum tri-level inversion topologys simultaneously.
Another object of the present invention provides a kind of inverse method based on above-mentioned inverter circuit, can solve the problems of the prior art, has the advantage of two level inverse conversion topological sum tri-level inversion topologys simultaneously.
A kind of inverter circuit of the present invention comprises charging capacitor, first switching tube, first filter inductance and filter capacitor, it is characterized in that: also comprise and closely-coupled second filter inductance of described first filter inductance, second switch pipe and the 3rd switching tube; Described first switching tube is connected between the input of the charging capacitor anode and first filter inductance; The input of described second filter inductance links to each other with the output of first filter inductance, and its output links to each other with the charging capacitor negative terminal; Described second switch Guan Yudi three switching tubes are unidirectional actuating switch, second switch Guan Yudi three switching tubes are connected in series, the negative terminal of second switch pipe links to each other with the input of described first filter inductance, and the anode of the 3rd switching tube links to each other with the output of described second filter inductance; One end of described filter capacitor links to each other with the output of described first filter inductance, and its other end links to each other with the tie point of described second switch pipe and the 3rd switching tube.
Described second switch Guan Yudi three switching tubes are silicon controlled rectifier.
Described second switch pipe also can be the 2nd IGBT and second diode that is in series, described the 3rd switching tube is the 3rd IGBT and the 3rd diode that is in series, the negative electrode of described second diode links to each other with the first filter inductance input, and the anode of described second diode links to each other with the emitter of described the 2nd IGBT; The anode of described the 3rd diode links to each other with the second filter inductance output, and the negative electrode of described the 3rd diode links to each other with the collector electrode of described the 3rd IGBT, and the collector electrode of described the 2nd IGBT links to each other with the emitter of described the 3rd IGBT.
An improvement as circuit of the present invention: described first filter inductance is identical with the characteristic of second filter inductance.
Described first switching tube is an IGBT, and its collector electrode links to each other with the charging capacitor anode, and its emitter links to each other with the input of first filter inductance.
As another improvement of the present invention: also comprise the 4th switching tube between the output that is connected on the charging capacitor negative terminal and second filter inductance in the circuit.
Described the 4th switching tube is the 4th IGBT, and its collector electrode links to each other with the output of second filter inductance, and its emitter links to each other with the charging capacitor negative terminal.
The present invention also provides a kind of inverse method based on a kind of inverter circuit of the present invention: inverter circuit produces between sinusoidal wave positive half period, the first switching tube conducting, first filter inductance and the second filter inductance energy storage, described first filter inductance and the described second filter inductance energy storage finish, described first switching tube disconnects, second switch pipe conducting simultaneously, the energy on second filter inductance shifts to first filter inductance, is charged to filter capacitor by first filter inductance; Inverter circuit produces between sinusoidal wave negative half-cycle, the first switching tube conducting, first filter inductance and the second filter inductance energy storage, described first filter inductance and the described second filter inductance energy storage finish, described first switching tube disconnects, the 3rd switching tube conducting simultaneously, the energy on first filter inductance shifts to second filter inductance, by second filter inductance to the filter capacitor reverse charging.
An improvement as the method for the invention: described inverter circuit also comprises the 4th switching tube between the output that is connected on the charging capacitor negative terminal and second filter inductance; Inverter circuit produces between sinusoidal wave positive half period, first switching tube and disconnection simultaneously after the 4th switching tube conducting a period of time, second switch pipe conducting simultaneously, the energy on second filter inductance is transferred on first filter inductance, is charged to filter capacitor by first filter inductance; Inverter circuit produces between sinusoidal wave negative half-cycle, first switching tube and disconnection simultaneously after the 4th switching tube conducting a period of time, the 3rd switching tube conducting simultaneously, the energy on first filter inductance is transferred on second filter inductance, by second filter inductance to the filter capacitor reverse charging.
The present invention also provides another kind of inverter circuit, comprise charging capacitor, the 4th switching tube, first filter inductance and filter capacitor, it is characterized in that: also comprise and closely-coupled second filter inductance of described first filter inductance, second switch pipe and the 3rd switching tube; The input of described first filter inductance links to each other with the anode of described charging capacitor, and its output links to each other with the input of described second filter inductance; Described the 4th switching tube is connected between the output of the charging capacitor negative terminal and second filter inductance; Described second switch Guan Yudi three switching tubes are unidirectional actuating switch, second switch Guan Yudi three switching tubes are connected in series, the negative terminal of second switch pipe links to each other with the input of described first filter inductance, and the anode of the 3rd switching tube links to each other with the output of described second filter inductance; One end of described filter capacitor links to each other with the output of described first filter inductance, and its other end links to each other with the tie point of described second switch pipe and the 3rd switching tube.
The present invention also provides a kind of inverse method based on another kind of inverter circuit of the present invention: inverter circuit produces between sinusoidal wave positive half period, the 4th switching tube conducting, first filter inductance and the second filter inductance energy storage, described first filter inductance and the described second filter inductance energy storage finish, described the 4th switching tube disconnects, second switch pipe conducting simultaneously, the energy on second filter inductance shifts to first filter inductance, is charged to filter capacitor by first filter inductance; Inverter circuit produces between sinusoidal wave negative half-cycle, the 4th switching tube conducting, first filter inductance and the second filter inductance energy storage, described first filter inductance and the described second filter inductance energy storage finish, described the 4th switching tube disconnects, the 3rd switching tube conducting simultaneously, the energy on first filter inductance shifts to second filter inductance, by second filter inductance to the filter capacitor reverse charging.
The invention has the beneficial effects as follows: circuit 1. of the present invention has adopted closely-coupled filter inductance, and as long as like this by regulating duty ratio D, the voltage that just can make output promptly can be than input voltage height, also can be lower than input voltage.Therefore only need lower Vbus voltage, just can obtain the output voltage that we wish.The circuit reaction is fast, and distortion is few.2. because Vbus voltage is lower, make the device that the Vbus side is relevant: the requirement of withstand voltage of electric capacity and switching tube can reduce, and can use withstand voltage lower general-purpose device, is particularly suitable for the higher converter of output voltage, has saved cost.3. in improvement circuit of the present invention, increased by the 4th switching tube, the voltage stress of first switching tube and the 4th switching tube has been reduced half, corresponding loss can reduce, and the efficient of inversion is improved; Make the inductive energy storage loop and the loop that releases energy definitely separate simultaneously, realized isolation.4. in the control, first switching tube was only opened once in each half period, had simplified control circuit, had reduced switching loss simultaneously.5. second switch pipe and the 3rd switching tube only in half cycle switch once reduced switching loss.6. as long as change second switch pipe and the 3rd switching tube into unidirectional switch, just can allow second switch pipe and the 3rd switching tube in the control by the switch mode operation of low frequency, i.e. just half cycle second switch pipe conducting always, the conducting always of negative half period the 3rd switching tube.Because its folk prescription, can obtain the waveform of needs equally to current flowing.The switching loss of second switch pipe and the 3rd switching tube can reduce like this.7. the Vbus side DC charging electrochemical capacitor because the current in middle wire of output is not flowed through so the ripple current on the electrochemical capacitor is less, can be saved the number of electric capacity.8. the present invention can also utilize three same circuit to form three-phase inverters, and each is single-phase all to have above effect.9. the present invention can be used on the small-sized UPS, is that a kind of cost is low, the scheme that performance is good.Owing to be to utilize inductance to carry out energy storage, working method is the pattern of current source, can realize function in parallel more simply, and have the function of Short Circuit withstand.As long as the inductive current during to energy storage is controlled, carry out between a plurality of inverter circuits just can realizing the direct parallel connection of inverter circuit synchronously.Bigger application prospect is arranged.
[description of drawings]
Fig. 1 is a kind of two level inverse conversion topologys.
Fig. 2 is a kind of tri-level inversion topology.
Fig. 3 is another kind of tri-level inversion topology.
Fig. 4 is a kind of inverter circuit schematic diagram of the present invention.
Fig. 5 is the circuit theory diagrams of first embodiment of the invention.
Fig. 6 is the circuit theory diagrams of second embodiment of the invention.
Fig. 7 is the circuit theory diagrams of third embodiment of the invention.
Fig. 8 is an another kind of inverter circuit schematic diagram of the present invention.
Fig. 9 is the circuit theory diagrams of the three-phase inverter of circuit composition of the present invention.
Figure 10 is the circuit theory diagrams of the another kind of three-phase inverter of circuit composition of the present invention.
[embodiment]
Below in conjunction with the drawings and specific embodiments the present invention is done to set forth further.
As shown in Figure 4, circuit of the present invention comprise charging capacitor CI, the first switching tube S1, the first filter inductance L1-1, with the 3rd switching tube S3 and the filter capacitor C of the closely-coupled second filter inductance L1-2 of the described first filter inductance L1-1, the second switch pipe S2 of unidirectional conducting, unidirectional conducting; The described first switching tube S1 is connected between the input of the charging capacitor C1 anode and the first filter inductance L1-1; The input of the described second filter inductance L1-2 links to each other with the output of the first filter inductance L1-1, and its output links to each other with charging capacitor C1 negative terminal; Described second switch pipe S2 and the 3rd switching tube S3 are connected in series, and the negative terminal of second switch pipe S2 links to each other with the input of the described first filter inductance L1-1, and the anode of the 3rd switching tube S3 links to each other with the output of the described second filter inductance L1-2; The end of described filter capacitor C links to each other with the output of the described first filter inductance L1-1, and its other end links to each other with the tie point of described second switch pipe S2 and the 3rd switching tube S3.
In the circuit of the present invention, the described first filter inductance L1-1 is identical with the characteristic of the second filter inductance L1-2.
Its circuit working principle is as follows:
When producing sinusoidal wave positive half cycle: the first switching tube S1 closure, second switch pipe S2 and the 3rd switching tube S3 disconnect, voltage between Vbus+ and the Vbus-is added on the first filter inductance L1-1 and the second filter inductance L1-2, energy on the charging capacitor C1 is gone up transfer to the filtering first filter inductance L1-1 and the second filter inductance L1-2, inductive current rises gradually, the filter inductance energy storage.The recruitment of described inductive current is:
Vin*D*T/2L1，
Wherein D is Ton/T, i.e. the duty ratio of switch conduction, and L1 is the inductance value of first filter inductance, T is the cycle.After a period of time, disconnect the first switching tube S1, while closed second switch pipe S2 (the 3rd switching tube S3 keeps disconnecting), the energy storage on first filter inductance is to filter capacitor C charging, and inductive current descends, and the reduction of inductive current is:
Vout*(1-D)*T/L1，
Wherein Vout is the voltage on the filter inductance.Because the first filter inductance L1-1 and the second filter inductance L1-2 are closely-coupled inductance,, the energy of the second filter inductance L1-2 upward charges to filter capacitor C so can transferring to the first filter inductance L1-1.Therefore the voltage on the filter capacitor C rises gradually.During stable state, the recruitment of inductive current equals its reduction, that is:
Vin*D*T/2L1＝Vout*(1-D)*T/L1，
We can draw thus:
Vout＝Vin*D/(2*(1-D))。
In like manner, when producing sinusoidal wave negative half period, the first switching tube S1 closure, second switch pipe S2 and the 3rd switching tube S3 disconnect, voltage between Vbus+ and the Vbus-is added on the first filter inductance L1-1 and the second filter inductance L1-2, energy on the charging capacitor C1 shifts on first filter inductance and second filter inductance, and inductive current rises gradually, the filter inductance energy storage.After a period of time, disconnect the first switching tube S1, simultaneously closed the 3rd switching tube S3 (second switch pipe S2 keeps disconnecting), the energy storage on the second filter inductance L1-2 is to filter capacitor C charging, and inductive current descends.Because the first filter inductance L1-1 and the second filter inductance L1-2 are closely-coupled inductance,, the energy of the first filter inductance L1-1 upward carries out reverse charging to filter capacitor C so transferring to the second filter inductance L1-2.Therefore the negative direction voltage on the filter capacitor C rises gradually.During stable state, can draw equally according to above-mentioned inference method:
Vout＝Vin*D/(2*(1-D))。
Can be drawn by following formula: by changing the make-and-break time of switch, the value of promptly regulating duty ratio D just can make that magnitude of voltage changes on the filter capacitor, the size of change output voltage.This just means, output voltage both can be than input voltage height, also can be lower than input voltage.So only need lower Vbus voltage, just can obtain the output voltage that we wish.Because Uc is the integration of Ic, just can obtain the sinewave output voltage waveform that we wish on the electric capacity simultaneously.This current control mode reaction is fast, and the voltage wave shape distortion of output is little.
Specific embodiment one:
As shown in Figure 5, the first switching tube S1 is an IGBT, and its collector electrode links to each other with charging capacitor C1 anode, and its emitter links to each other with the input of the first filter inductance L1-1; Also comprise the diode of inverse parallel on a described IGBT.Second switch pipe S2 and the 3rd switching tube S3 are thyristor SCR.Other connection of this circuit is identical with Fig. 4.
In the circuit working process, when inductive energy storage discharged to filter capacitor, because close-coupled, the energy of energy first filter inductance of second filter inductance can shift mutually.
Like this, do the afterflow branch road with SCR, low frequency switches, and the first switching tube S1 is PWM and regulates.Its operation principle is identical with Fig. 4 circuit.
Specific embodiment two:
Circuit as shown in Figure 6, second switch pipe S2 is the 2nd IGBT and the diode D2 that is in series, the collector electrode of the 2nd IGBT links to each other with filter capacitor C second end, and emitter links to each other with the anode of the second diode D2, and the negative electrode of the second diode D2 links to each other with the first filter inductance L1-1 input; Described the 3rd switching tube S3 is the 3rd IGBT and the triode D3 that is in series, the collector electrode of described the 3rd IGBT links to each other with the negative electrode of the 3rd diode D3, emitter links to each other with filter capacitor C second end, and the anode of described the 3rd diode D3 links to each other with the second filter inductance L1-2 output.Also comprise the diode of inverse parallel on described insulated gate bipolar transistor npn npn IGBT, other connection of this circuit is identical with Fig. 4.
Like this, do the afterflow branch road with IGBT, do low frequency and switch, the first switching tube S1 is PWM and regulates.Its operation principle is identical with Fig. 4 circuit.
Specific embodiment three;
As shown in Figure 7, increased the 4th switching tube S4 between the output that is connected the charging capacitor C1 negative terminal and the second filter inductance L1-2 in the circuit; The first switching tube S1 is an IGBT, and its collector electrode links to each other with charging capacitor C1 anode, and its emitter links to each other with the input of the first filter inductance L1-1; The 4th switching tube S4 is the 4th IGBT, and its collector electrode links to each other with the output of the second filter inductance L1-2, and its emitter links to each other with charging capacitor C1 negative terminal.Also comprise inverse parallel at diode D1 on the IGBT and inverse parallel the diode D4 on the 4th IGBT.Other connection of this circuit is identical with Fig. 6 circuit.
After having increased by the 4th switching tube S4, the voltage stress of first switching tube and the 4th switching tube has been reduced half, corresponding loss can reduce, and the efficient of inversion is improved; Make inductive energy storage loop and bleed-off circuit definitely separate simultaneously, realized isolation.
Like this, do the afterflow branch road with IGBT, do low frequency and switch, the first switching tube S1 and the 4th switching tube S4 are PWM and regulate.Its operation principle is identical with Fig. 4 circuit.
Fig. 8 is an another kind of inverter circuit schematic diagram of the present invention: the input of the described first filter inductance L1-1 links to each other with the anode of described charging capacitor C1, and its output links to each other with the input of the described second filter inductance L1-2; Described the 4th switching tube S4 is connected between the output of the charging capacitor C1 negative terminal and the second filter inductance L1-2; Described second switch pipe S2 links to each other with the input of the described first filter inductance L1-1 with an end of the series arm of the 3rd switching tube S3, and its other end links to each other with the output of the described second filter inductance L1-2; The end of described filter capacitor C links to each other with the output of the described first filter inductance L1-1, and its other end links to each other with the tie point of described second switch pipe S2 and the 3rd switching tube S3.
Its operation principle is identical with the described circuit of Fig. 4.
Producing between sinusoidal wave positive half period, the 4th switching tube S4 conducting, the first filter inductance L1-1 and the second filter inductance L1-2 energy storage, S4 disconnects after a period of time, second switch pipe S2 conducting (the 3rd switching tube S3 disconnection) simultaneously, energy on the second filter inductance L1-2 shifts to the first filter inductance L1-1, is charged to filter capacitor C by the first filter inductance L1-1; Producing between sinusoidal wave negative half-cycle, the 4th switching tube S4 conducting, the first filter inductance L1-1 and second filter inductance mouth-2 energy storage, disconnect after a period of time, the 3rd switching tube S3 conducting (second switch pipe S2 disconnection) simultaneously, energy on the first filter inductance L1-1 shifts to the second filter inductance L1-2, by the second filter inductance L1-2 to filter capacitor C reverse charging.
As shown in Figure 9, utilize three same circuit of the present invention can form a three-phase inverter, its operation principle and control method be with above-mentioned the same, and each single-phasely all has an effect the same with foregoing circuit.
As shown in figure 10, utilize three same circuit of the present invention can form another kind of three-phase inverter, wherein in each group, all adopted two groups of switching tubes.Its operation principle and control method be with above-mentioned the same, and each single-phasely all has an effect the same with foregoing circuit.
Claims (11)
1, a kind of inverter circuit, comprise charging capacitor (C1), first switching tube (S1), first filter inductance (L1-1) and filter capacitor (C), it is characterized in that: also comprise and closely-coupled second filter inductance of described first filter inductance (L1-1) (L1-2), second switch pipe (S2) and the 3rd switching tube (S3); Described first switching tube (S1) is connected between the input of charging capacitor (C1) anode and first filter inductance (L1-1); The input of described second filter inductance (L1-2) links to each other with the output of first filter inductance (L1-1), and its output links to each other with charging capacitor (C1) negative terminal; Described second switch pipe (S2) is unidirectional actuating switch with the 3rd switching tube (S3), second switch pipe (S2) is connected in series with the 3rd switching tube (S3), the negative terminal of second switch pipe (S2) links to each other with the input of described first filter inductance (L1-1), and the anode of the 3rd switching tube (S3) links to each other with the output of described second filter inductance (L1-2); One end of described filter capacitor (C) links to each other with the output of described first filter inductance (L1-1), and its other end links to each other with the tie point of described second switch pipe (S2) with the 3rd switching tube (S3).
2, a kind of inverter circuit according to claim 1 is characterized in that: described second switch pipe (S2) is a silicon controlled rectifier with the 3rd switching tube (S3).
3, a kind of inverter circuit according to claim 1, it is characterized in that: two IGBT and second diode (D2) of described second switch pipe (S2) for being in series, three IGBT and three diode (D3) of described the 3rd switching tube (S3) for being in series, the negative electrode of described second diode (D2) links to each other with first filter inductance (L1-1) input, and the anode of described second diode (D2) links to each other with the emitter of described the 2nd IGBT; The anode of described the 3rd diode (D3) links to each other with second filter inductance (L1-2) output, and the negative electrode of described the 3rd diode (D3) links to each other with the collector electrode of described the 3rd IGBT, and the collector electrode of described the 2nd IGBT links to each other with the emitter of described the 3rd IGBT.
4, a kind of inverter circuit according to claim 1 is characterized in that: described first filter inductance (L1-1) is identical with the characteristic of second filter inductance (L1-2).
5, a kind of inverter circuit according to claim 1 is characterized in that: described first switching tube (S1) is an IGBT, and its collector electrode links to each other with charging capacitor (C1) anode, and its emitter links to each other with the input of first filter inductance (L1-1).
6, a kind of inverter circuit according to claim 1 is characterized in that: also comprise the 4th switching tube (S4) between the output that is connected on charging capacitor (C1) negative terminal and second filter inductance (L1-2).
7, a kind of inverter circuit according to claim 6 is characterized in that: described the 4th switching tube (S4) is the 4th IGBT, and its collector electrode links to each other with the output of second filter inductance (L1-2), and its emitter links to each other with charging capacitor (C1) negative terminal.
8, a kind of inverse method based on the described a kind of inverter circuit of claim 1, it is characterized in that: inverter circuit produces between sinusoidal wave positive half period, first switching tube (S1) conducting, first filter inductance (L1-1) and second filter inductance (L1-2) energy storage, described first filter inductance (L1-1) and described second filter inductance (L1-2) energy storage finish, described first switching tube (S1) disconnects, second switch pipe (S2) conducting simultaneously, energy on second filter inductance (L1-2) shifts to first filter inductance (L1-1), is charged to filter capacitor (C) by first filter inductance (L1-1); Inverter circuit produces between sinusoidal wave negative half-cycle, first switching tube (S1) conducting, first filter inductance (L1-1) and second filter inductance (L1-2) energy storage, described first filter inductance (L1-1) and described second filter inductance (L1-2) energy storage finish, described first switching tube (S1) disconnects, the 3rd switching tube (S3) conducting simultaneously, the energy on first filter inductance (L1-1) shifts to second filter inductance (L1-2), by second filter inductance (L1-2) to filter capacitor (C) reverse charging.
9, inverse method according to claim 8 is characterized in that: described inverter circuit also comprises the 4th switching tube (S4) between the output that is connected on charging capacitor (C1) negative terminal and second filter inductance (L1-2); Inverter circuit produces between sinusoidal wave positive half period, first switching tube (S1) and disconnection simultaneously after the 4th switching tube (S4) conducting a period of time, second switch pipe (S2) conducting simultaneously, energy on second filter inductance (L1-2) is transferred on first filter inductance (L1-1), is charged to filter capacitor (C) by first filter inductance (L1-1); Inverter circuit produces between sinusoidal wave negative half-cycle, first switching tube (S1) and disconnection simultaneously after the 4th switching tube (S4) conducting a period of time, the 3rd switching tube (S3) conducting simultaneously, energy on first filter inductance (L1-1) is transferred on second filter inductance (L1-2), by second filter inductance (L1-2) to filter capacitor (C) reverse charging.
10, a kind of inverter circuit, comprise charging capacitor (C1), the 4th switching tube (S4), first filter inductance (L1-1) and filter capacitor (C), it is characterized in that: also comprise and closely-coupled second filter inductance of described first filter inductance (L1-1) (L1-2), second switch pipe (S2) and the 3rd switching tube (S3); The input of described first filter inductance (L1-1) links to each other with the anode of described charging capacitor (C1), and its output links to each other with the input of described second filter inductance (L1-2); Described the 4th switching tube (S4) is connected between the output of charging capacitor (C1) negative terminal and second filter inductance (L1-2); Described second switch pipe (S2) is unidirectional actuating switch with the 3rd switching tube (S3), second switch pipe (S2) is connected in series with the 3rd switching tube (S3), the negative terminal of second switch pipe (S2) links to each other with the input of described first filter inductance (L1-1), and the anode of the 3rd switching tube (S3) links to each other with the output of described second filter inductance (L1-2); One end of described filter capacitor (C) links to each other with the output of described first filter inductance (L1-1), and its other end links to each other with the tie point of described second switch pipe (S2) with the 3rd switching tube (S3).
11, a kind of inverse method based on the described a kind of inverter circuit of claim 10, it is characterized in that: inverter circuit produces between sinusoidal wave positive half period, the 4th switching tube (S4) conducting, first filter inductance (L1-1) and second filter inductance (L1-2) energy storage, described first filter inductance (L1-1) and described second filter inductance (L1-2) energy storage finish, described the 4th switching tube (S4) disconnects, second switch pipe (S2) conducting simultaneously, energy on second filter inductance (L1-2) shifts to first filter inductance (L1-1), is charged to filter capacitor (C) by first filter inductance (L1-1); Inverter circuit produces between sinusoidal wave negative half-cycle, the 4th switching tube (S4) conducting, first filter inductance (L1-1) and second filter inductance (L1-2) energy storage, described first filter inductance (L1-1) and described second filter inductance (L1-2) energy storage finish, described the 4th switching tube (S4) disconnects, the 3rd switching tube (S3) conducting simultaneously, the energy on first filter inductance (L1-1) shifts to second filter inductance (L1-2), by second filter inductance (L1-2) to filter capacitor (C) reverse charging.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004101008204A CN100456616C (en) | 2004-12-08 | 2004-12-08 | Inverter circuit and inverting method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004101008204A CN100456616C (en) | 2004-12-08 | 2004-12-08 | Inverter circuit and inverting method thereof |
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| CN1665117A CN1665117A (en) | 2005-09-07 |
| CN100456616C true CN100456616C (en) | 2009-01-28 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101336508B (en) * | 2006-02-01 | 2012-05-30 | Abb研究有限公司 | Switchgear cell and converter circuit for switching a large number of voltage levels |
| CN102751893A (en) * | 2012-06-29 | 2012-10-24 | 徐下兵 | Inverter circuit |
| CN103731127B (en) | 2012-10-16 | 2016-12-21 | 通用电气公司 | Circuit for the electrical switch that Synchronization Control is connected in series |
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| JPH11308879A (en) * | 1998-04-22 | 1999-11-05 | Nippo Denki Kk | Neutral point type inverter |
| CN1286521A (en) * | 2000-10-19 | 2001-03-07 | 南京航空航天大学 | Three-level DC converter of zero-voltage switch with clamping diode |
| US6353547B1 (en) * | 2000-08-31 | 2002-03-05 | Delta Electronics, Inc. | Three-level soft-switched converters |
| CN1449102A (en) * | 2003-05-12 | 2003-10-15 | 南京航空航天大学 | Main circuit topology of tri-electrical-level double-dropping type semi-bridge inverter and control method thereof |
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- 2004-12-08 CN CNB2004101008204A patent/CN100456616C/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11308879A (en) * | 1998-04-22 | 1999-11-05 | Nippo Denki Kk | Neutral point type inverter |
| US6353547B1 (en) * | 2000-08-31 | 2002-03-05 | Delta Electronics, Inc. | Three-level soft-switched converters |
| CN1286521A (en) * | 2000-10-19 | 2001-03-07 | 南京航空航天大学 | Three-level DC converter of zero-voltage switch with clamping diode |
| CN1449102A (en) * | 2003-05-12 | 2003-10-15 | 南京航空航天大学 | Main circuit topology of tri-electrical-level double-dropping type semi-bridge inverter and control method thereof |
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| CN1665117A (en) | 2005-09-07 |
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