CN108174625A - Supply unit and its control method - Google Patents
Supply unit and its control method Download PDFInfo
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- CN108174625A CN108174625A CN201680061181.6A CN201680061181A CN108174625A CN 108174625 A CN108174625 A CN 108174625A CN 201680061181 A CN201680061181 A CN 201680061181A CN 108174625 A CN108174625 A CN 108174625A
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- Prior art keywords
- cell translation
- inverter
- rectifier
- temperature
- supply unit
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/483—Converters with outputs that each can have more than two voltages levels
- H02M7/49—Combination of the output voltage waveforms of a plurality of converters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/501—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode sinusoidal output voltages being obtained by the combination of several pulse-voltages having different amplitude and width
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
- Dc-Dc Converters (AREA)
Abstract
The present invention provides a kind of supply unit and its control method, the difference of the temperature between cell translation device can be suitably controlled in the supply unit that forms and then suitably protects the multiple cell translation devices being made of SST are connected in series with.The supply unit with multiple cell translation devices of the present invention, direct current in rectifier is converted to and carries out direct current conversion via high frequency transformer after high frequency by cell translation device, in inverter rectangular voltage is generated with the DC voltage that rectifier provides, supply unit will be connected in series with as the rectangular voltage of the output of the inverter of multiple cell translation devices and obtain the exchange of low frequency, including：Control unit possessed by each unit converter is worth rectangular voltage of the control as the output of corresponding cell translation device, and will be previously determined to be during rectangular voltage for each unit converter duration different from each other based on the output order；Detection forms the temperature detecting unit of the temperature of the switch element of rectifier and inverter；With the control device of the output order value of difference that the temperature detected by temperature detecting unit is reflected to the output of each control unit, in the difference for producing temperature, remain in operation during being previously determined to be by the change of output order value for the rectangular voltage of each cell translation device during different from each other.
Description
Technical field
The present invention relates to using AC or DC voltage as power supply, have a transformer and arbitrary alternating current supplied to load
The multiple supply units and its control method for being connected in series with composition of the power inverter of pressure.
Background technology
Insulating transformer for system connection is driven with the low frequency (power frequency) of tens of Hz identical with system frequency, so
There are the subjects that the small-sized of insulating transformer, lightweight are difficult.
For the subject, studied using solid-state transformer (hereinafter referred to as SST) instead of insulating transformer.
SST is by with the high frequency transformer of the high-frequency drive of several kHz~hundreds of Hz, the rectifier of driving high frequency transformer, use
The output voltage of rectifier exports the electric power such as the inverter of alternating voltage of tens of Hzs identical with system frequency as power supply
Rectifier is formed, thus instead of existing insulating transformer.According to the structure of SST, although will be to existing insulating transformer list
Body add the power rectifiers such as rectifier and inverter, but by with the high-frequency drive insulating transformer of tens of~hundreds of kHz into
Capable miniaturization, even if in the structure in the SST for having added power rectifier can be realized to be driven with existing with tens of Hz
Insulating transformer single phase than significantly miniaturization, lightweight.In this way, SST plays the function of insulating transformer, and SST
Itself also plays the function of power inverter.
As the specific configuration example for the power inverter for using SST, such as propose disclosed in non-patent literature 1
Structure.In power inverter described in non-patent literature 1, pass through the low capacity that will have used high frequency transformer, low pressure resistance
Power inverter more go here and there multi-parallel connection and can be applied to high pressure, high power applications.In addition, following will use
The low capacity of high frequency transformer, the explanations more gone here and there premised on multi-parallel connection of power inverter, that is, SST of low pressure resistance, the feelings
SST under condition by more string multi-parallel connections is known as cell translation device.
Multiple cell translation devices are gone here and there to multi-parallel connection more to form the supply unit applied to high pressure, high power applications
When, it needs the configuration of multiple cell translation devices in same housing.In this case, it is difficult to make the week between whole cell translation devices
Enclose temperature condition and cooling condition homogenization, it is contemplated that it is even that the temperature of cell translation device becomes difference.In addition, the because difference of temperature
The difference in the service life of semiconductor element and passive device can be caused, so the short service life and reliability there are system reduce in this way
Subject.
As the scheme for solving the subject, patent document 1 is disclosed.In technology described in patent document 1, will be multiple
In the parallel redundancy mode power supply that rectifier is connected in parallel, have the temperature detecting unit for the internal temperature for detecting each rectifier,
The output current of rectifier reduced by the output current for the rectifier for making temperature high, made temperature low increases multiple whole to realize
Flow the homogenization of the internal temperature of device.
Existing technical literature
Patent document
Patent document 1：International Publication WO99-25052
Non-patent literature
Non-patent literature 1：Chounhong Zhao,Silvia Lewdeni-Schmid,Juergen K.Steinke,
Michael Weiss,Toufann Chaudhuri,Marc Pellerin,Joeph Duron and Philipe
Stefanutti:“Design,Implementation and Performance of a modular Power
Electronic Transformer for Railway Application”,Proceedings of 13th European
Conference on Power Electronics and Applications,pp.1-10(2011)
Invention content
The subject that the invention solves
But in the technology described in patent document 1, it is defined in and multiple rectifiers is output and input what is be connected in parallel
Structure, there is no any records for the structure that input or output about rectifier are connected in series with.
In the supply unit imagined in the present invention, the exchange output multi-parallel connection of multiple cell translation devices is formed should
For high pressure, the supply unit of high power applications, the middle output during separate provision of each unit converter respectively provides
Constant voltage generates the sine wave of AC system by the synthesis of multiple outputs being connected in series with.
According to the above, the purpose of the present invention is to provide a kind of in the multiple cell translation device strings that will be made of SST
Connection connection and can be suitably controlled in the supply unit that forms temperature between cell translation device difference so that suitably into
The supply unit and its control method of row protection.
A technical solution to solve project
In order to solve the above problems, in the present invention, it is that " a kind of supply unit with multiple cell translation devices, unit turn
Direct current in rectifier is converted to and carries out direct current conversion via high frequency transformer after high frequency by parallel operation, and rectification is used in inverter
The DC voltage generation rectangular voltage that device provides, supply unit will be as the rectangle of the output of the inverter of multiple cell translation devices
Voltage Series connection obtains the exchange of low frequency, including：Control unit possessed by each unit converter is referred to based on output
Rectangular voltage of the value control as the output of corresponding cell translation device is enabled, and will be previously determined to be during rectangular voltage pair
In each unit converter duration different from each other；Detection forms the temperature inspection of the temperature of the switch element of rectifier and inverter
Survey unit；With the output order value of difference that the temperature detected by temperature detecting unit is reflected to the output of each control unit
Control device, in the difference for producing temperature, by output order value change be previously determined to be for each unit convert
It remains in operation during rectangular voltage during device is different from each other ".
In addition, the present invention is that " a kind of supply unit with multiple cell translation devices, cell translation device will in rectifier
Direct current is converted to high frequency and carries out direct current conversion via high frequency transformer later, the DC voltage provided in inverter with rectifier
Rectangular voltage is generated, supply unit is connected in series with as the rectangular voltage of the output of the inverter of multiple cell translation devices
And the exchange of low frequency is obtained, the inverter in multiple cell translation devices is between rectifier with smoothing capacity device and with structure
The switch element for including anti-parallel diodes of electric bridge is helped, inverter is within 1 period of the exchange of low frequency with not year-on-year
The switch element for including anti-parallel diodes that on or off forms full electric bridge is alternately iterated through during the time of example
And make the first state not flowed in smoothing capacity device in the electric current that exchange side flows and full electricity is formed by or off
The switch element including anti-parallel diodes of bridge and make the electric current flowed in exchange side in the first direction of smoothing capacity device
Second state of upper flowing, and when the temperature of composition inverter or the switch element of rectifier produces difference, change pair
During the time of the different different proportion of each inverter, shorten and detect the of the inverter in the cell translation device of high temperature
The time of the second state of the inverter in the cell translation device of high temperature is not detected in the time of two-state and extension ".
In addition, the present invention is that " a kind of supply unit with multiple cell translation devices, cell translation device will in rectifier
Direct current is converted to high frequency and carries out direct current conversion via high frequency transformer later, the DC voltage provided in inverter with rectifier
Rectangular voltage is generated, supply unit is obtained being connected in series with as the rectangular voltage of the output of the inverter of multiple cell translation devices
To the exchange of low frequency, the control device of each being set in multiple cell translation devices, so that inverse in multiple cell translation devices
The mode that output current is equal and the input current of rectifier is different for becoming device is controlled ".
In addition, the present invention is that " a kind of control method of supply unit, wherein supply unit have in rectifier and inverter
Between there are multiple cell translation devices of capacitor, cell translation device is converted to direct current after high frequency via height in rectifier
Frequency power transformer carries out direct current conversion, and rectangular voltage is generated with the DC voltage that rectifier provides in inverter, and supply unit will
The rectangular voltage of the output of inverter as multiple cell translation devices, which is connected in series with, obtains the exchange of low frequency, turns as unit
It is redefined for, for each cell translation device duration different from each other, forming during the rectangular voltage of the output of parallel operation
When the temperature of the switch element of rectifier and inverter produces difference, shorten the rectangular voltage of the high cell translation device of temperature
It remains in operation during period and the rectangular voltage for extending other cell translation devices ".
In addition, the present invention is that " a kind of control method of supply unit, wherein supply unit have in rectifier and inverter
Between there are multiple cell translation devices of capacitor, cell translation device is converted to direct current after high frequency via height in rectifier
Frequency power transformer carries out direct current conversion, and rectangular voltage is generated with the DC voltage that rectifier provides in inverter, and supply unit will
The rectangular voltage of the output of inverter as multiple cell translation devices, which is connected in series with, obtains the exchange of low frequency, rectifier and inverse
Become device and include the switch element for including anti-parallel diodes for forming full electric bridge, in the switch member for forming rectifier and inverter
When the temperature of part is high, stop the rectifier of the cell translation device, by or off form full electric bridge include reverse parallel connection
The switch element of diode and the electric current flowed in exchange side is made to be flowed up in the first party of smoothing capacity device, for multiple lists
1 or more cell translation device of the complete job in first converter forms including reversely simultaneously for full electric bridge by or off
The switch element of union II pole pipe and make the electric current flowed in exchange side in first direction opposite direction of smoothing capacity device
Two sides flow up ".
Invention effect
According to a preferred embodiment of the invention, it is connected in series with and structure by the input of multiple cell translation devices or output
Into power inverter in can also make the equalizing temperature of cell translation device.Thereby, it is possible to inhibit the longevity of cell translation device
The difference of life can realize the long lifetime and highly reliableization of power inverter.
Description of the drawings
Fig. 1 is the figure of the configuration example for the supply unit for representing embodiment 1.
Fig. 2 is the figure of the circuit structure example of the inverter in the cell translation device for represent Fig. 1.
Fig. 3 is the figure of the circuit structure example of the rectifier in the cell translation device for represent Fig. 1.
Fig. 4 is the flow chart of the decision logic of the control device for the supply unit for representing Fig. 1.
Fig. 5 is the oscillogram of the action of the supply unit of definition graph 1.
Fig. 6 a are the figures of the flow direction of the inverter circuit structure and electric current under the pattern 1 for representing Fig. 5.
Fig. 6 b are the figures of the flow direction of the inverter circuit structure and electric current under the pattern 2 for representing Fig. 5.
Fig. 6 c are the figures of the flow direction of the inverter circuit structure and electric current under the pattern 3 for representing Fig. 5.
Fig. 6 d are the figures of the flow direction of the inverter circuit structure and electric current under the pattern 4 for representing Fig. 5.
Fig. 7 a are the figures of the flow direction of the inverter circuit structure and electric current under the pattern 5 for representing Fig. 5.
Fig. 7 b are the figures of the flow direction of the inverter circuit structure and electric current under the pattern 6 for representing Fig. 5.
Fig. 7 c are the figures of the flow direction of the inverter circuit structure and electric current under the mode 7 for representing Fig. 5.
Fig. 7 d are the figures of the flow direction of the inverter circuit structure and electric current under the pattern 8 for representing Fig. 5.
The figure of the flow direction of inverter circuit structure and electric current under the pattern 5 of Fig. 5 when Fig. 8 a are the difference for representing temperature.
The figure of the flow direction of inverter circuit structure and electric current under the pattern 6 of Fig. 5 when Fig. 8 b are the difference for representing temperature.
The figure of the flow direction of inverter circuit structure and electric current under the mode 7 of Fig. 5 when Fig. 8 c are the difference for representing temperature.
The figure of the flow direction of inverter circuit structure and electric current under the pattern 8 of Fig. 5 when Fig. 8 d are the difference for representing temperature.
Fig. 9 is the flow chart of the decision logic of the control device for the power inverter for representing embodiment 2.
Figure 10 is the oscillogram of the action for the power inverter for illustrating embodiment 2.
Figure 11 is the flow chart of the decision logic of the control device for the power inverter for representing embodiment 3.
Figure 12 is the figure for the principle for illustrating the exchange of electric power using inverter in embodiment 3.
Figure 13 a are the figures of the flow direction of the inverter circuit structure and electric current under the pattern 31a for representing Figure 12.
Figure 13 b are the figures of the flow direction of the inverter circuit structure and electric current under the pattern 31b for representing Figure 12.
Figure 13 c are the figures of the flow direction of the inverter circuit structure and electric current under the pattern 31c for representing Figure 12.
Figure 14 a are the figures of the flow direction of the inverter circuit structure and electric current under the pattern 32a for representing Figure 12.
Figure 14 b are the figures of the flow direction of the inverter circuit structure and electric current under the pattern 32b for representing Figure 12.
Figure 14 c are the figures of the flow direction of the inverter circuit structure and electric current under the pattern 32c for representing Figure 12.
Figure 15 a are the figures of the flow direction of the inverter circuit structure and electric current under the pattern 34 for representing Figure 12.
Figure 15 b are the figures of the flow direction of the inverter circuit structure and electric current under the pattern 35 for representing Figure 12.
Specific embodiment
Below with reference to the attached drawing preferred embodiment that the present invention will be described in detail.
Embodiment 1
For the embodiment of the present invention 1, illustrated with attached drawing.First, Fig. 1 is the electricity for representing the embodiment of the present invention 1
The figure of the configuration example of source device.
The supply unit 100 of the embodiment 1 of whole outline structure is shown in FIG. 1, such as has 4 cell translation devices
1a, 1b, 1c, 1d, using the knot that the input terminal of cell translation device 1a, 1b, 1c, 1d are connected in parallel, are connected in series with output terminal
Structure by the use of power supply 2 as input, exports arbitrary alternating voltage Vinv so as to supply AC power to the system 3 as load.Separately
Outside, the alternating voltage Vinv provided with the structure of Fig. 1 is 1 phase, so when using three-phase alternating current, each for system 3 mutually has
The structure of standby Fig. 1.
In Fig. 1, cell translation device 1a, 1b, 1c, 1d by with power supply 2 generate respectively arbitrary DC voltage Vdc1,
Rectifier 6a, 6b, 6c, 6d of Vdc2, Vdc3, Vdc4；Respectively by the use of DC voltage Vdc1, Vdc2, Vdc3, Vdc4 as input,
Generate inverter 7a, 7b, 7c, 7d of alternating voltage；Detect rectifier 6a, 6b, 6c, 6d temperature Tc1, Tc2, Tc3, Tc4 and
Control unit 5a, 5b, 5c, 5d of temperature Ti1, Ti2, Ti3, Ti4 of inverter 7a, 7b, 7c, 7d are formed.In addition, SST is suitable
In the circuit part being made of rectifier 6a, 6b, 6c, 6d and inverter 7a, 7b, 7c, 7d.
Control device 4 is sent to control unit 5a, 5b, 5c, 5d temperature information detected.Control device 4 is based on
The temperature information that detects determines the output order value of each unit converter 1a, 1b, 1c, 1d, to each unit converter 1a, 1b,
Control unit 5a, 5b, 5c, 5d of 1c, 1d send output order value Pref1, Pref2, Pref3, Pref4.Each unit converter
Control unit 5a, 5b, 5c, 5d of 1a, 1b, 1c, 1d are controlled according to output order value Pref1, Pref2, Pref3, the Pref4 provided
Inverter 7a, 7b, 7c, 7d and rectifier 6a, 6b, 6c, 6d processed.
Inverter 7a, 7b, 7c, 7d are as illustrated in Figure 2, form by 4 switches of smoothing capacity device C7, full electric bridge connection
Element Q1, Q2, Q3, Q4, the friendship formed with diode D1, D2, D3, D4 that switch element Q1, Q2, Q3, Q4 are connected in inverse parallel
Straight conversion circuit generates arbitrary alternating voltage respectively with the DC voltage Vdc determined by rectifier 6.
Rectifier 6a, 6b, 6c, 6d as illustrated in fig. 3, by input capacitor C1, full electric bridge connection switch element H1,
H2, H3, H4, diode DH1, DH2, DH3, DH4, the resonating capacitor being connected in inverse parallel with switch element H1, H2, H3, H4
Cr, transformer T, 4 rectifier diodes Dr1, Dr2, Dr3, Dr4 of electric bridge connection and filter condenser Cm are formed, and generation is arbitrary
DC voltage Vdc.Transformer T is made of boost inductor Lr, first winding N1, secondary winding N2, but can also be included altogether
It shakes capacitor Cr and forms so-called LLC transformers.
Circuit structure according to fig. 3 passes through switch element H1, H2, H3, H4 and the electricity of diode DH1, DH2, DH3, DH4
Bridge connects and composes straight friendship conversion circuit, and the direct current input of power supply 2 is converted to the high frequency of several kHz~hundreds of Hz.Transformer T is true
While protecting insulation, using high frequency transformer, so as to realize and the existing insulating transformer monomer driven with tens of Hz
Compared to significantly miniaturization, lightweight.The high frequency output of the secondary side of transformer T, by rectifier diode Dr1, Dr2, Dr3,
It is rectified in the rectification circuit that Dr4 is formed, obtains DC voltage Vdc.In addition, by the inverter 7 of Fig. 2 and 6 structure of rectifier of Fig. 3
Into SST.
Fig. 4 is the flow chart of the decision logic of the control device 4 for the supply unit 100 for representing Fig. 1.Hereinafter, it is carried out with Fig. 4
Explanation.In initial processing step S101 in the flow of Fig. 1, the temperature that is detected in each unit converter 1a, 1b, 1c, 1d
Degree information Tc1, Tc2, Tc3, Tc4, Ti1, Ti2, Ti3, Ti4 are input to control device 4.In processing step S102, it is based on
The temperature information inputted in processing step S101 judges whether the difference of the temperature between each unit converter.
Processing step S103 is judged as implementing during the difference there are temperature in processing step S102, high to reduce temperature
The mode of the input current of cell translation device generates the output order value to the cell translation device.In addition, processing step S104 exists
It is judged as implementing during the difference there are temperature in processing step S102, to increase the input current of the low cell translation device of temperature
Mode generates the output order value to the cell translation device.The output order that the control device 4 of supply unit 100 provides as a result,
The total of value is maintained as centainly.In this way, in the supply unit 100 of embodiment 1, it is each based on being detected with temperature detecting unit
The temperature information of cell translation device, by control device 4 determine each unit converter 1a, 1b, 1c, 1d output order value Pref1,
Pref2、Pref3、Pref4。
Fig. 5, Fig. 6 a, Fig. 6 b, Fig. 6 c, Fig. 6 d are the figures for illustrating the pattern of the supply unit 100 of embodiment 1.
Fig. 5 represents the action waveforms of the supply unit 100 of embodiment 1, and Fig. 6 a, Fig. 6 b, Fig. 6 c, Fig. 6 d represent the electricity for illustrating embodiment 1
The circuit diagram of the circuit operation of source device.
Illustrate the action of the supply unit in the embodiment of the present invention 1 with Fig. 5, Fig. 6 a, Fig. 6 b, Fig. 6 c, Fig. 6 d below.It is first
The action waveforms of the supply unit 100 of first definition graph 5.Herein, as action waveforms, 1 week of AC system voltage is shown
Interim voltage waveform and the input current to rectifier.
In Fig. 5, during T1 is positive half-wave, during T2 is negative half-wave.In the example of Fig. 5, such as the 4 of the structure of Fig. 1
Rectifier 6a, 6b, 6c, 6d in cell translation device 1a, 1b, 1c, 1d of group continuously generate the advance size determined respectively
DC voltage Vdc1, Vdc2, Vdc3, Vdc4, on the other hand, inverter 7a, 7b, 7c, 7d are only in the conducting determined respectively in advance
The alternating voltage of rectangle is connected and generated in period, and sinuous friendship is finally determined as by the composite value being connected in series with
Galvanic electricity presses Vinv.In order to generate the alternating voltage of the rectangle of Fig. 5, the effect undertaken by inverter 7 and rectifier 6 can also be it
He acts on, but sets rectifier 6 herein and be sized, during the adjustment conducting of inverter 7, carries out following explanation.In addition, embodiment 1
In, if the size of DC voltage Vdc1, Vdc2, Vdc3, Vdc4 that rectifier 6a, 6b, 6c, 6d are determined are certain.
In addition, during conducting about inverter 7, in the example of fig. 5, inverter 7a is in moment t0 to the phase of moment t7
Between apply positive DC voltage Vdc1, inverter 7b applies positive DC voltage Vdc2 during moment t1 to moment t6, inverse
Become device 7c and apply positive DC voltage Vdc3 during moment t2 to moment t5, inverter 7d is in moment t3 to the phase of moment t4
Between apply positive DC voltage Vdc4, thus generate positive AC wave shape.In addition, similarly, inverter 7a moment t9 to when
Apply negative DC voltage Vdc1 during carving t16, inverter 7b applies negative direct current during moment t10 to moment t15
Voltage Vdc2, inverter 7c apply negative DC voltage Vdc3 during moment t11 to moment t14, and inverter 7d is at the moment
Apply negative DC voltage Vdc4 during t12 to moment t13, thus generate negative AC wave shape.
Control unit 5a, 5b, 5c, 5d of each unit converter 1a, 1b, 1c, 1d output provided are referred to from control device 4
Enable value Pref1, Pref2, Pref3, Pref4, be the sinusoidal waveform in order to finally realize Fig. 5, and by each unit converter 1a,
The information such as size and sequential that 1b, 1c, 1d to be born are provided as instruction, but in following explanation based on the relationship of voltage
It carries out, so being illustrated with voltage instruction value Vref.The voltage instruction value Vref of sinusoidal waveform to each unit converter 1a,
Control unit 5a, 5b, 5c, 5d of 1b, 1c, 1d are provided, and the direct current respectively to be born is determined in control unit 5a, 5b, 5c, 5d
The size of voltage Vdc, and determine respectively to start, stop the sequential of conducting.
In addition, in fig. 5 it is shown that each unit converter 1a, 1b, 1c, 1d apply above-mentioned voltage when, it is right from power supply 2
The size of the DC current of each unit converter 1a, 1b, 1c, 1d input.Run well positive half-wave in, by during conducting compared with
The sequence of long cell translation device 1a, 1b, 1c, 1d flows through DC current I1a, I1b, I1c, I1d of higher value.In addition, producing
The difference of raw temperature, change power command value it is negative during, by cell translation device 1d, 1b, 1c, 1a longer during conducting
Sequence flow through DC current I1d, I1b, I1c, I1a of higher value.In addition, about alternating current Iinv, turn in multiple units
The output current of inverter is equal in parallel operation, and is sinus wave systems.
By described above it is found that the supply unit of embodiment 1 is with the output current of inverter in multiple cell translation devices
The mode that Iinv is equal, input current I1a, I1b, I1c, I1d of rectifier are different is controlled.In addition, based on detecting
Temperature information reduces the input current of the high cell translation device of temperature, increases the input current of the low cell translation device of temperature.
Fig. 6 a, Fig. 6 b, Fig. 6 c, FIG. 6d shows that Fig. 5 it is each during inverter 7a, 7b, 7c, 7d circuit structure and electricity
Logical circulation road.Herein, if the state during moment t0~t1 is shown for pattern 1 in Fig. 6 a, if during moment t1~t2
State is shown in figure 6b for pattern 2, if the state during moment t2~t3 is shown in fig. 6 c for pattern 3, if moment t3
State during~t4 is shown in fig. 6d for pattern 4.In addition, in Fig. 6 a, Fig. 6 b, Fig. 6 c, Fig. 6 d, C7a, C7b, C7c,
C7d is provided in the smoothing capacity device of the input side of each inverter 7a, 7b, 7c, 7d.
Under the pattern 1 (moment t0~t1) shown in Fig. 6 a, the switch element Q1a and Q4a of inverter 7a, inverter 7b
Switch element Q4b, the switch element Q4c of inverter 7c, inverter 7d switch element Q4d be conducting state, other switch member
Part is off state.In this case, in inverter 7a, with switch element Q4a, smoothing capacity device C7a, switch element Q1a
Loop flows through electric current.In addition, in inverter 7b, electric current is flowed through with the loop of switch element Q4b, diode D2b.In inverter
In 7c, the loop with switch element Q4c, diode D2c similary with inverter 7b flows through electric current.In 7d electric current also with inverter
7b, 7c equally flow through electric current with the loop of switch element Q4d, diode D2d.At this point, the output voltage Vinv of supply unit is
The DC voltage Vdc1 of cell translation device 1a.
Pattern 2 is transferred to when voltage instruction value Vref becomes larger than Vdc1 in the state of pattern 1.In the mould shown in Fig. 6 b
Under formula 2 (moment t1~t2), make the switch element Q1b of inverter 7b become conducting state in the state of pattern 1.In this way,
In inverter 7b, electric current is flowed through with the loop of switch element Q4b, smoothing capacity device C7b, switch element Q1b.Inverter 7a, 7c,
7d acts identical with pattern 1.At this point, the output voltage Vinv of supply unit is the DC voltage Vdc1 and list of cell translation device 1a
The sum of the DC voltage Vdc2 of first converter 1b.
Pattern 3 is transferred to when voltage instruction value Vref becomes larger than Vdc2 in the state of pattern 2.In the mould shown in Fig. 6 c
Under formula 3 (moment t2~t3), make the switch element Q1c of inverter 7c become conducting state in the state of pattern 2.In this way,
In inverter 7c, electric current is flowed through with the loop of switch element Q4c, smoothing capacity device C7c, switch element Q1c.Inverter 7a, 7b,
7d acts identical with pattern 2.At this point, the output voltage Vinv of supply unit is the DC voltage Vdc1 and list of cell translation device 1a
The DC voltage of the DC voltage Vdc2 and cell translation device 1c of first converter 1b Vdc3's and.
Pattern 4 is transferred to when voltage instruction value Vref becomes larger than Vdc3 in the state of pattern 3.In the mould shown in Fig. 6 d
Under formula 4 (moment t3~t4), make the switch element Q1d of inverter 7d become conducting state in the state of pattern 3.In this way,
In inverter 7d, electric current is flowed through with the loop of switch element Q4d, smoothing capacity device C7d, switch element Q1d.Inverter 7a, 7b,
7c acts identical with pattern 3.At this point, the output voltage Vinv of supply unit is the DC voltage Vdc1 and list of cell translation device 1a
The DC voltage of the DC voltage Vdc3 and cell translation device 1d of the DC voltage Vdc2 and cell translation device 1c of first converter 1b
The sum of Vdc4.In addition, only having switch element Q4a in the state of before the instant, in inverter 7a is set as conducting state.
With foregoing is illustrative of the sines of the range of 0 degree to 90 degree of the output voltage Vinv that can generate supply unit
Wave voltage, it is known that during remaining 90 degree to 180 degree also can by the way that above-mentioned pattern is made to carry out realizing in reverse order,
So description is omitted.
In addition, the 180 degree for the output voltage Vinv for realizing supply unit is shown in Fig. 7 a, Fig. 7 b, Fig. 7 c, Fig. 7 d extremely
The circuit structure of negative sine voltage of 360 degree of range and the flow direction of electric current.Fig. 7 a are inverse under the pattern 5 for representing Fig. 5
Become the figure of device circuit structure, Fig. 7 b are the figures of the inverter circuit structure under the pattern 6 for representing Fig. 5, and Fig. 7 c are the moulds for representing Fig. 5
The figure of inverter circuit structure under formula 7, Fig. 7 d are the figures of the inverter circuit structure under the pattern 8 for representing Fig. 5.
It, can be according to Fig. 6 a, figure because being about the flow direction of Fig. 7 a, Fig. 7 b, Fig. 7 c, the circuit structure of Fig. 7 d and electric current
6b, Fig. 6 c, the circuit structure of Fig. 6 d and electric current the item that easily speculates of flow direction, so detailed description will be omitted, but substantially exist
In the case of the inverter 7 for sharing alternating voltage Vinv, switch element Q2 and Q3 are conducting states, other switch elements Q1,
Q4 is off state, flows through electric current with the loop of switch element Q2, smoothing capacity device C7, switch element Q3.In addition, friendship is not shared
In other inverters 7 of galvanic electricity pressure, switch element Q3 is conducting state, flows through electricity with the loop of diode D1, switch element Q3
Stream.In addition, the sequence about each pattern, based on the sequence in positive wave, is implemented by the sequence of pattern 5, pattern 6, mode 7, pattern 8
.
It is judged as the control in the case of the difference there is no temperature in the more than action specification processing step S102 of Fig. 4
Action in device 4 and the circuit structure being achieved in.In contrast, it is judged as there is temperature in the processing step S102 of Fig. 4
In the case of the difference of degree, process as described below.
In this example, in the positive half period T1 of voltage instruction value Vref, the cell translation that is detected about control device 4
The temperature of device 1, it is assumed that be judged as that cell translation device 1a highests, the temperature of cell translation device 1d are minimum.At this point, control device 4 is such as
The difference of Fig. 5 when generating it is shown in the negative half period T2 of voltage instruction value with by cell translation device 1a and cell translation device 1d
Effect exchange mode generate output order value, to each unit converter send output order.It is right in example shown in fig. 5
The cell translation device 1a of square-wave voltage is generated when normal during moment t8 to moment t16, is changed in moment t12 extremely
Generate square-wave voltage during moment t13, for it is normal when square-wave voltage is generated during the moment t12 to moment 13
Cell translation device 1d is changed to generate square-wave voltage during moment t8 to t16.
In this way, by based on the drive mode of temperature information determining means converter detected, temperature can be made high
The input current of cell translation device 1a is reduced, and the input current for the cell translation device 1d for making temperature low increases.
The circuit of negative sine voltage is realized when the difference for generating temperature is shown in Fig. 8 a, Fig. 8 b, Fig. 8 c, Fig. 8 d
The flow direction of structure and electric current.The figure of inverter circuit structure under the pattern 5 of Fig. 5 when Fig. 8 a are the difference for representing temperature, figure
The figure of inverter circuit structure under the pattern 6 of Fig. 5 when 8b is the difference for representing temperature, when Fig. 8 c are the difference for representing temperature
Fig. 5 mode 7 under inverter circuit structure figure, the inversion under the pattern 8 of Fig. 5 when Fig. 8 d are the difference for representing temperature
The figure of device circuit structure.
It, can be according to Fig. 7 a, figure because being about the flow direction of Fig. 8 a, Fig. 8 b, Fig. 8 c, the circuit structure of Fig. 8 d and electric current
7b, Fig. 7 c, the circuit structure of Fig. 7 d and electric current the item that easily speculates of flow direction, so detailed description will be omitted, but substantially exist
Under pattern 5 (moment t9~t10), the inverter 7a that the big inverter 7d of temperature margin replaces temperature margin small shares alternating current
Pressure, under pattern 6 (moment t10~t11), additional inverter 7b shares alternating voltage by inverter 7b and 7d, mode 7 (when
Carve t11~t12) under, and then additional inverter 7c shares alternating voltage by inverter 7b and 7c and 7d, in (the moment t12 of pattern 8
~t13) under, the small inverter 7a of additional temperature margin shares alternating voltage by inverter 7a and 7b and 7c and 7d.
By performing the processing, the current lead-through time of the small inverter 7a of temperature margin is most short, and temperature generation is pressed down
System.In addition, in described above, the difference of temperature is detected during positive half-wave, so in during next bear
Generate output order value in a manner that cell translation device 1a to be exchanged with the effect of cell translation device 1d, but and then it is next just
Half-wave during after also continue to implement.
More than, it, can be based on the temperature having for each unit converter in power inverter in embodiment 1
The temperature information that detection unit detects determines the output order value of the drive mode as cell translation device.Thereby, it is possible to make
The temperature-averaging of cell translation device so being capable of the difference in straining element service life, realizes highly reliableization of power inverter.
In addition, the serial number of cell translation device is set in embodiment 1 can increase as 4 grades, but by further increasing series
The series of the output voltage of power inverter, so the filtered electrical connected between system and power inverter can be realized
The miniaturization of sensor and filter condenser is the miniaturization of power inverter.
In addition, the power supply inputted to share of cell translation device is set in embodiment 1, but not limited to this.Can also use pair
The structure of independent power supply is connected in each cell translation device.In addition, in embodiment 1, by each half period of voltage instruction value
The drive mode of switch unit converter, but can also be by shorter each period half period than voltage instruction value or per several
Period switches drive mode.
Embodiment 2
Embodiment 1 be the conducting for being conceived to cell translation device during solution, make the conducting phase in cell translation device
Between in the cell translation device with hot nargin and without switching between the cell translation device of hot nargin.
In contrast, in embodiment 2, another governing factor i.e. direct-current chain of rectifier that is conceived in cell translation device
The DC-link voltage Vdc of cell translation device with hot nargin is set as higher by voltage Vdc, by the unit of no hot nargin
The DC-link voltage Vdc of converter is set as relatively low.
Then, it for the embodiment of the present invention 2, is illustrated with Fig. 9, Figure 10.In addition, the supply unit in embodiment 2
Structure be structure same as Example 1, so omitting the description.It is illustrated below for the difference from embodiment 1.
Fig. 9 is the flow chart for the decision logic for representing in embodiment 2, the supply unit of Fig. 1 control device 4.Below
It is illustrated with Fig. 9.
In initial processing step S201 in the flow of Fig. 9, detected in each unit converter 1a, 1b, 1c, 1d
Temperature information Tc1, Tc2, Tc3, Tc4, Ti1, Ti2, Ti3, Ti4 are input to control device 4.In processing step S202, base
The temperature information inputted in processing step S201 judges to whether there is the difference of temperature between each unit converter.
In the case that processing step S203 is judged as there are the difference of temperature in processing step S202, to reduce temperature height
The mode of DC-link voltage Vdc of cell translation device generate command value to the cell translation device.In addition, simultaneously, processing step
In the case that rapid S204 is judged as there are the difference of temperature in processing step S202, to increase the low cell translation device of temperature
The mode of DC-link voltage Vdc generates the command value to the cell translation device.Thus the control device 4 of power inverter provides
Command value (DC-link voltage Vdc) it is total be maintained as it is certain.
In this way, in the supply unit of embodiment 2, based on the temperature of each unit converter detected with temperature detecting unit
Information is spent, command value Pref1, Pref2, Pref3, Pref4 of each unit converter 1a, 1b, 1c, 1d are determined by control device 4.
In addition, as it is making that DC-link voltage Vdc increases and decreases as a result, during conducting in the cell translation device of the object also by
It suitably changes.The alternating voltage of sinusoidal waveform in order to obtain, the measure are indispensable.In addition, in increase DC-link voltage
In the case of Vdc, during shortening conducting, in the case where reducing DC-link voltage Vdc, during extending conducting.Each unit turns
Control unit 5a, 5b, 5c, 5d of parallel operation 1a, 1b, 1c, 1d control DC-link voltage by generating the control signal of rectifier
The size and length of Vdc1, Vdc2, Vdc3, Vdc4.
Then, the action of supply unit is illustrated with Figure 10.In Figure 10, temperature highest, the list of cell translation device 1d are shown
The example of the minimum situation of the temperature of first converter 1a.It is not present under the usual state of difference in temperature, each unit converter 1a,
DC-link voltage Vdc1, Vdc2, Vdc3, Vdc4 that control unit 5a, 5b, 5c, 5d of 1b, 1c, 1d are determined are set as identical value
(Vdc1=Vdc2=Vdc3=Vdc4), but when detecting difference in detecting temperature, pass through the cell translation device for making temperature high
The DC-link voltage Vdc1 of the cell translation device 1a increases that the DC-link voltage Vdc4 of 1d is reduced, made temperature high, can reduce list
The input current I1d of first converter 1d, the input current I1a of adding unit converter 1a.In addition, by by DC-link voltage
Decrease amount av in Vdc4 is directly added DC-link voltage Vdc1, and the voltage integrally born can be made to remain certain.
In this way, in embodiment 2, finer Electric control can be carried out by the DC-link voltage Vdc for controlling rectifier,
So the difference of the temperature of cell translation device can be reduced compared with Example 1.
More than, in example 2, only make the direct current of the highest cell translation device of temperature and the minimum cell translation device of temperature
Chain voltage change, but the DC-link voltage by controlling whole cell translation devices, can more subtly reduce cell translation device
Temperature difference.
In addition, the input current of the rectifier in Figure 10, is corresponding to during the DC-link voltage Vdc of rectifier and conducting
The size that ground determines.
Embodiment 3
Embodiment 1 and embodiment 2 are in the case where detecting the difference of temperature of cell translation device in common control model
Enclose interior reply.In contrast, it when the difference of temperature further increases, needs to carry out at the also protectiveness including stopping measure
Reason.In embodiment 3, it is characterized in that also implementing conservation measures except embodiment 1, embodiment 2.As conservation measures, make detection
Rectifier stopping to the cell translation device of high temperature is effective, but herein and then hand over from the electric power of other cell translation devices
It changes.
For the embodiment of the present invention 3, illustrated with attached drawing.In addition, the structure and reality of the supply unit in embodiment 3
It is identical to apply 1 structure of example, so omitting the description.Hereinafter, the difference from embodiment 1, embodiment 2 is illustrated.Figure 11 is
Represent the flow chart of the decision logic of in embodiment 3, the power inverter of Fig. 1 control device 4.
In initial processing step S302 in the flow chart of Figure 11, detected in each unit converter 1a, 1b, 1c, 1d
To temperature information Tc1, Tc2, Tc3, Tc4, Ti1, Ti2, Ti3, Ti4 be input to control device 4.In processing step S302
In, based on the temperature information inputted in processing step S301, judge whether the difference of the temperature between each unit converter.
In the case that processing step S303 is judged as there are the difference of temperature in processing step S302, judge whether to stop
Rectifier 6a, 6b, 6c, 6d of cell translation device 1a, 1b, 1c, 1d.Herein, by predetermined temperature threshold value Tref with
The temperature information Tmax detected is compared and judges whether to stop rectifier 6a, 6b, 6c, 6d.
Control in the state of difference there are temperature but the degree less than start protection function, in processing step S305
Defined in processing step S306.Herein, first in processing step S305, for being judged as Tref in processing step S303>
The rectifier of the cell translation device of Tmax sends reduced output order from control device 4.In addition, in processing step S306,
The Tref in processing step S303>During Tmax, the rectifier transmission of the cell translation device low to temperature from control device 4 makes output
Instruct increased instruction.
In addition, the processing defined in processing step S305 and processing step S306, identical with the process content of Fig. 4.
In contrast, in processing step S304, for being judged as Tref in the processing of processing step S303<The list of Tmax
First converter, rectifier halt instruction is generated from control device 4, and rectifier is sent to corresponding control unit 5a, 5b, 5c, 5d
Halt instruction.That is, there are the degree of the difference of temperature and high temperature to detection temperature Tmax more than temperature threshold Tref
In the state of, overheat countermeasure of the rectifier stopping as defencive function is performed at once.
Processing step S304 can be to the function supplementary protection function of Fig. 4.
In this way, in the supply unit of embodiment 3, it can be based on each unit converter detected by temperature detecting unit
Temperature information is judged whether to stop rectifier by control device 4.
Thereby, it is possible to protection location converters, can realize highly reliableization of supply unit.
Embodiment 4
As illustrated by embodiment 3, as the defencive function for overheat, it is effective to make corresponding rectifier stopping.But
It is still insufficient only in this way in the viewpoint of supply unit miniaturization to be.Illustrate its reason below.It is filled in the power supply of Fig. 1
It puts in 100, it is contemplated that the temperature T1a of cell translation device 1a is more than the situation (Tref of temperature threshold Tref<T1a).At this point, with coming from
When the instruction of control device 4 stops the action of the rectifier 6a of cell translation device 1a, from rectifier 6a's in inverter 7a
Power supply is stopped, and cell translation device 1a stops.
This means that for sharing alternating voltage Vinv operatings by 4 cell translation devices 1a, 1b, 1c, 1d, by 3 units
Converter 1b, 1c, 1d share alternating voltage Vinv and remain in operation.That is, in the state of cell translation device 1a stoppings, in order to only use
Remaining cell translation device 1b, 1c, 1d remain in operation, need to increase the DC voltage Vdc2 of each unit converter 1b, 1c, 1d,
Vdc3、Vdc4。
This means that needing the device pressure resistance of the semiconductor element of each unit converter being designed larger, cost is caused to carry
It is high.Sharing voltage and being connected in series with to reduce by exchange side for cell translation device 1, can reduce inverter 7 and rectifier 6
The overvoltage capacity of the middle semiconductor element used, thus, it is possible to using the miniaturization that supply unit is realized together with SST, but with
Execution part, which shuts down, to be needed to reserve nargin in the overvoltage capacity of every 1 cell translation device, it is meant that needs to carry out to big
The reply that the direction that type, cost improve is fallen back.
According to the above, in the embodiment of the present invention 4, the following additional reply after stopping rectifier being performed.With attached
Figure explanation only makes the action of the power inverter of situation that rectifier stops.Herein, illustrate the positive half cycle in system voltage
The temperature T1a of interim cell translation device 1a is more than the situation (Tref of temperature threshold Tref<T1a), in negative half of system voltage
Additional reply in period.In addition, additional reply also continues to implement afterwards.
In the main circuit structure of Fig. 1, when the action of rectifier 6a stops, from whole in the inverter 7a of cell translation device 1a
The power supply for flowing device 6a stops.At this point, in order to only be remained in operation with remaining cell translation device 1b, 1c, 1d, need to make each list
DC voltage Vdc2, Vdc3, Vdc4 of first converter 1b, 1c, 1d distinguish each increase Vdc1/3.
This needs the device pressure resistance of each unit converter being designed larger, cost may be caused to improve.Embodiment 4 passes through
The Change Power between inverter can continue the action of cell translation device that rectifier stops so that not needing to increase each
The DC voltage Vdc of cell translation device.
When rectifier 6a stops in the positive half period of the system voltage of Figure 12, the inverter 7a's of cell translation device 1a
Input is that DC voltage Vdc1 is continuously decreased, the DC voltage with such as cell translation device 1b as other cell translation devices
When Vdc2 compares, Vdc2>Vdc1.
In this case, determining means converter 1a in a manner of control device 4 is shortest during the action of cell translation device 1a,
The pattern of 1b, 1c, 1d.Herein, the pattern of cell translation device 1a, 1b, 1c, 1d are set as cell translation device 1d → 1b
→1c→1a.That is, with it is illustrated in fig. 5 in the same manner as, into exercise need during the conducting of cell translation device 1a protected it is most short, make
Longest exchange during the conducting of cell translation device 1d with nargin.Specifically, so as to need cell translation device to be protected
Become most during becoming shortest t34-t35 during the conducting of 1a, during the conducting that makes the cell translation device 1d with nargin
Mode during long t31-t38 swaps.
In addition, sharing in order to which cell translation device 1a is enable to carry out voltage in t34-t35 during its conducting, need to replace
The rectifier 6a of stopping, from other cell translation devices 1b, 1c, 1d first capacitor C7a is filled before t34-t35 during conducting
The required reply of electricity.The charging is known as exchange of electric power.
In fig. 12, by for before the t34-t35 during conducting first to capacitor C7a charging exchange of electric power pattern
It is denoted as pattern 31.Pattern 31 in fig. 12 at the time of t31~t32 during perform.And then pattern 31 is by pattern described below
31a, 31b, 31c are formed.About pattern 31, in case of enumerating the smoothing capacity device C7a chargings to cell translation device 1a, say
The action of bright supply unit.
First, the output voltage Vinv of supply unit is expressed with (1) formula.Va, Vb, Vc, Vd be respectively cell translation device 1a,
The exchange side voltage that 1b, 1c, 1d apply is carried out in a manner of being equal to voltage instruction value Vref by itself and i.e. output voltage Vinv
It controls and controls to the load i.e. electric power of system supply.
[formula 1]
Vinv=Va+Vb+Vc+Vd (1)
3 groups of small modes of composition pattern 31 (during moment t31~t32) are shown in Figure 13 a, Figure 13 b, Figure 13 c i.e.
The circuit structure in cell translation device 1a, 1b, 1c, 1d and current path at this time under 31a, 31b, 31c.
Under initial small mode, that is, pattern 31a, as depicted in fig. 13 a, in inverter 7a, switch element Q1a and Q4a become
Conducting state, electric current are flowed through from the lateral ground side of power supply with the access of Q1a → C7a → Q4a, the output as cell translation device 1a
Voltage Va applies Va=+Vdc1.In inverter 7b, switch element Q2b and Q3b become conducting state, and electric current laterally connects from power supply
Ground side is flowed through with the access of Q2b → C7b → Q3b, and the output voltage Vb as cell translation device 1b applies Vb=-Vdc2.Inversion
In device 7c, only switch element Q2c becomes conducting state, and electric current is flowed through from the lateral ground side of power supply with the access of Q2c → D4c, right
Apply Vc=0 in the output voltage Vc of cell translation device 1c.In inverter 7d, switch element Q2d and Q3d become conducting state,
Output voltage Vd as cell translation device 1d applies Vd=-Vdc4.
By the above, the output voltage Vinv of supply unit becomes Vinv=Vdc1-Vdc2- under pattern 31a
Vdc4.That is, 2 inverters 7b, 7d in inverter 7b, 7c, the 7d that can run well apply negative output respectively, to inversion
The capacitor charging of device 7a, while series circuit adds up to the original necessary voltage Vdc of application.Herein, from inverter 7b, 7d to inverse
Become device 7a and carry out exchange of electric power.
Under next small mode, that is, pattern 31b, as illustrated in fig. 13b, inverter 7a maintains the structure of pattern 31a, switch
Element Q1a and Q4a become conducting state, and electric current is flowed through from the lateral ground side of power supply with the access of Q1a → C7a → Q4a, as list
The output voltage Va of first converter 1a applies Va=+Vdc1.Only switch element Q2b becomes conducting state, electric current in inverter 7b
It is flowed through from the lateral ground side of power supply with the access of Q2b → D4b, Vb=0 is applied for the output voltage Vb of cell translation device 1b.It is inverse
Become the structure that device 7c maintains pattern 31a, only switch element Q2c becomes conducting state, electric current from the lateral ground side of power supply with Q2c →
The access of D4c flows through, and applies Vc=0 for the output voltage Vc of cell translation device 1c.Inverter 7d maintains the knot of pattern 31a
Structure, switch element Q2d and Q3d become conducting state, and the output voltage Vd as cell translation device 1d applies Vd=-Vdc4.
By the above, the output voltage Vinv of supply unit becomes Vinv=Vdc1-Vdc4 under pattern 31b.That is,
Inverter 7d in inverter 7b, 7c, the 7d that can run well applies negative output, charges to the capacitor of inverter 7a,
Series circuit, which adds up to, simultaneously applies Vdc1-Vdc4.Herein, exchange of electric power is carried out to inverter 7a from inverter 7d.
During pattern 31, basically pattern 31a and pattern 31b alternate repetitions are until the direct current of cell translation device 1a
Voltage Vdc1 reaches desired value Vdcref or until moment t32.At this point, the ratio of pattern 31a and pattern 31b are to meet (2)
The mode of formula is determined by time scale D.
[formula 2]
Vref=Vinv=D × (- Vdc1+Vdc2+Vdc4)+(1-D) × (- Vdc1+Vdc4) (2)
And then during pattern 31 in small mode 31c under, handled as shown in figure 13 c.Under pattern 31c,
The only switch element Q2a of inverter 7a becomes conducting state, and electric current is flowed through from the lateral ground side of power supply with the access of Q2a → D4a,
Va=0 is applied for the output voltage Va of cell translation device 1a.Inverter 7b and 7c maintain the circuit of pattern 31b, respectively Vb
=0, Vc=0.Inverter 7d maintains the circuit of pattern 31b, applies Vd=- for the output voltage Vd of cell translation device 1d
Vdc4.According to the above, the output voltage Vinv of power inverter becomes Vinv=-Vdc4.Pattern 31c is continued until
Arrival moment t32.
Then, the pattern 32 (moment t32-t33) implemented after pattern 31 (moment t31-t32) is illustrated.
3 groups of small modes 32a, 32b, 32c of composition pattern 32 (during moment t32~t33) are shown in Figure 14 a, Figure 14 b, Figure 14 c
Under cell translation device 1a, 1b, 1c, 1d in circuit structure and current path at this time.
Under initial small mode, that is, pattern 32a of pattern 32 (during moment t32~t33), as shown in figures 14a,
In inverter 7a, switch element Q1a and Q4a become conducting state, and electric current is from the lateral ground side of power supply with Q1a → C7a → Q4a's
Access flows through, and the output voltage Va as cell translation device 1a applies Va=+Vdc1.In inverter 7b, switch element Q2b and
Q3b becomes conducting state, and electric current is flowed through from the lateral ground side of power supply with the access of Q2b → C7b → Q3b, as cell translation device
The output voltage Vb of 1b applies Vb=-Vdc2.In inverter 7c, switch element Q2c and Q3c become conducting state, electric current from
The lateral ground side of power supply is flowed through with the access of Q2c → C7c → Q3c, and the output voltage Vc as cell translation device 1c applies Vc=-
Vdc3.In inverter 7d, switch element Q2d and Q3d become conducting state, and the output voltage Vd as cell translation device 1d is applied
Add Vd=-Vdc4.
By the above, the output voltage Vinv of supply unit becomes Vinv=Vdc1-Vdc2- under pattern 32a
Vdc3-Vdc4.That is, whole inverter 7b, 7c, 7d in inverter 7b, 7c, the 7d that can run well apply respectively it is negative defeated
Go out, charge to the capacitor of inverter 7a, while series circuit adds up to the original necessary voltage Vinv=Vdc1-Vdc2- of application
Vdc3-Vdc4.Herein, exchange of electric power is carried out to inverter 7a from inverter 7b, 7c, 7d.
Under next small mode, that is, pattern 32b, circuit is formed as illustrated in fig. 13b, is the pattern 31a phases with Figure 13 a
Same circuit structure.That is, in this case, in inverter 7a, switch element Q1a and Q4a become conducting state, and electric current is from power supply
Lateral ground side is flowed through with the access of Q1a → C7a → Q4a, and the output voltage Va as cell translation device 1a applies Va=+
Vdc1.In inverter 7b, switch element Q2b and Q3b become conducting state, electric current from the lateral ground side of power supply with Q2b → C7b →
The access of Q3b flows through, and the output voltage Vb as cell translation device 1b applies Vb=-Vdc2.In inverter 7c, only switch element
Q2c becomes conducting state, and electric current is flowed through from the lateral ground side of power supply with the access of Q2c → D4c, for the defeated of cell translation device 1c
Go out voltage Vc and apply Vc=0.In inverter 7d, switch element Q2d and Q3d become conducting state, as cell translation device 1d's
Output voltage Vd applies Vd=-Vdc4.
By the above, the output voltage Vinv of supply unit becomes Vinv=Vdc1-Vdc2- under pattern 31a
Vdc4.That is, 2 inverters 7b, 7d in inverter 7b, 7c, the 7d that can run well apply negative output respectively, to inversion
The capacitor charging of device 7a, while series circuit adds up to the original necessary voltage Vdc of application.Herein, from inverter 7b, 7d to inverse
Become device 7a and carry out exchange of electric power.
During pattern 32, pattern 32a is with pattern 32b alternate repetitions until the DC voltage Vdc1 of cell translation device 1a
Reach desired value Vdcref.At this point, the ratio of pattern 32a and pattern 32b in a manner of meeting above-mentioned (2) formula by time scale D
It determines.
When the DC voltage Vdc1 of middle cell translation device 1a reaches desired value Vdcref during pattern 32, it is transferred to mould
Formula 32c.
Under small mode, that is, pattern 32c, as shown in figure 14 c, the only switch element Q2a of inverter 7a becomes conducting state,
Electric current is flowed through from the lateral ground side of power supply with the access of Q2a → D4a, and the output voltage Va of cell translation device 1a becomes Va=0.It is inverse
Become in device 7b, switch element Q2b and Q3b become conducting state, and electric current is from the lateral ground side of power supply with the logical of Q2b → C7b → Q3b
Road is flowed through, and the output voltage Vb as cell translation device 1b applies Vb=-Vdc2.Only switch element Q2c becomes in inverter 7c
Conducting state, electric current are flowed through from the lateral ground side of power supply with the access of Q2c → D4c, the output voltage Vc of cell translation device 1a into
For Vc=0.In inverter 7d, switch element Q2d and Q3d become conducting state, the output voltage Vd as cell translation device 1d
Apply Vd=-Vdc4.By the above, the output voltage Vinv of supply unit becomes Vinv=-Vdc2-Vdc4.
Pattern 32c continues to moment t33.
Then, the action of pattern 33 (moment t33-t34), pattern 34 (moment t34-t35) is illustrated with Figure 15 a, Figure 15 b.
Under the pattern 33 (moment t33-t34) shown in Figure 15 a, the only switch element Q2a of inverter 7a becomes conducting shape
State, electric current are flowed through from the lateral ground side of power supply with the access of Q2a → D4a, and the output voltage Va of cell translation device 1a becomes Va=
0.In inverter 7b, switch element Q2b and Q3b become conducting state, and electric current is from the lateral ground side of power supply with Q2b → C7b → Q3b
Access flow through, as cell translation device 1b output voltage Vb apply Vb=-Vdc2.In inverter 7c, switch element Q2c and
Q3c becomes conducting state, and electric current is flowed through from the lateral ground side of power supply with the access of Q2c → C7c → Q3c, as cell translation device
The output voltage Vc of 1c applies Vc=-Vdc3.In inverter 7d, switch element Q2d and Q3d become conducting state, as unit
The output voltage Vd of converter 1d applies Vd=-Vdc4.By the above, the output voltage Vinv of power inverter becomes
Vinv=-Vdc2-Vdc3-Vdc4.Pattern 33 continues to moment t34.
Under the pattern 34 (moment t34-t35) shown in Figure 15 b, the switch element Q2a and Q3a of inverter 7a become conducting
State, electric current are flowed through from the lateral ground side of power supply with the access of Q2a → C7a → Q2a, and the output voltage of cell translation device 1a becomes
Va=-Vdc1.
In inverter 7b, switch element Q2b and Qb3 become conducting state, and the output voltage Vb of cell translation device 1b becomes
Vb=-Vdc2.Switch element Q2c and Q3c become conducting state in inverter 7c, and the output voltage Vc of cell translation device 1c becomes
Vc=-Vdc3.The switch element Q2d and Q3d of inverter 7d becomes conducting state, and the output voltage Vd of cell translation device 1d becomes
Vd=-Vdc4.By the above, the output voltage Vinv of power inverter becomes Vinv=-Vdc1-Vdc2-Vdc3-
Vdc4.Pattern 33 continues to moment t35.
It is similarly to be acted with pattern 33 during moment t35~t36, is same with pattern 32 during moment t36~t37
The action of sample is similarly to be acted with pattern 31 during the moment 37~38, so omitting detailed description.
More than, according to embodiment 4, it is shortest during the conducting for stopping side inverter in a manner of swap, and at this
During the conducting of stopping side inverter starting before period, pass through from complete job side inverter to the flat of stopping side inverter
Sliding capacitor Change Power can charge, so can also make whole cell translation devices in the case where rectifier stops
Inverter works.As a result, with make inverter stop situation compared with the pressure resistance of the device of cell translation device can be designed compared with
It is low, so the small-sized, cost effective of conversion equipment can be realized.
In addition, charge during pattern 31 and pattern 32 in fig. 12 is enumerated in embodiment 4 to cell translation device 1a
It is illustrated for situation, in this case, making pattern 31a and pattern 31b during pattern 31 repeatedly.Only in pattern 31
In the case of the charging complete of period cell translation device 1a, the pattern of Figure 12 can also be fixed on after the pattern that is transferred to 32
The mode of 32c works.
In addition, in Figure 12, about input current I1a, I1b, I1c, I1d of rectifier, the input current in negative half-wave
I1a becomes 0 because rectifier 6a stops.In addition, participate in rectifier 6b, 6d of cell translation device 1d, 1b of exchange of electric power
Input current I1b, I1d increase, but the input current I1c for not participating in the rectifier 6c of the cell translation device 1c of exchange of electric power is constant
Change.
In addition, by Fig. 6 a to Fig. 6 d, Fig. 7 a to Fig. 7 d, Fig. 8 a to Fig. 8 d, in the circuit structure in these inverters 7,
It can mainly make in a manner that the electric current for flowing through exchange side does not flow through smoothing capacity device, make including reversely simultaneously for the full electric bridge of composition
The switching elements conductive of union II pole pipe or the first state (such as 7b, 7c, 7d of Fig. 6 a) of shutdown, and to flow through the electricity of exchange side
It flows the mode flowed through on the first direction (direction flowed through from bottom to top of smoothing capacity device 7) of smoothing capacity device, make composition
The switching elements conductive including anti-parallel diodes of full electric bridge or the second state (such as 7a of Fig. 6 a) of shutdown are in low frequency
During time in 1 period of exchange alternately, in varing proportions repeatedly, and in the switch for forming inverter or rectifier
When difference is generated in the temperature of element, during changing the time for the different ratio of each inverter, shortening detects high temperature
Cell translation device in inverter the second state time, extend and inverter in the cell translation device of high temperature be not detected
The second state time.
And then it by Figure 13 a to Figure 13 c, Figure 14 a to Figure 14 c, Figure 15 a to Figure 15 b, is connect with the rectifier of stopping
Inverter 7a, with first direction opposite second direction of the electric current in smoothing capacity device C7a become to flow through exchange side are (smooth
The direction flowed through from the top down of capacitor 7) on flow through mode, opening the anti-parallel diodes that include of composition full electric bridge
Element conductive or the third state (such as 7a of Figure 13 a) of shutdown are closed, the inverter in other cell translation devices is made to become second
Thus state charges.
4 embodiments are enumerated above, but correspondingly can also combine the content described in above-described embodiment with purposes
It uses.
Utilization possibility in industry
The power inverter of the present invention can be applied to and the high pressures such as solar power generation, wind-power electricity generation, electric railway
Commercial system connection power inverter.
Reference sign
1a、1b、1c、1d：Cell translation device, 2：Power supply, 3：System, 4：Control device, 5a, 5b, 5c, 5d：Control unit,
6、6a、6b、6c、6d：Rectifier, T：Transformer, 7,7a, 7b, 7c, 7d：Inverter, H1, H2, H3, H4, Q1, Q2, Q3, Q4,
Q1a、Q2b、Q3c、Q4d：Switch element, DH1, DH2, DH3, DH4, D1, D2, D3, D4：Anti-parallel diodes, Dr1, Dr2,
Dr3、Dr4：Rectifier diode, Lr：Boost inductor, Cr：Resonating capacitor, N1：First winding, N2：Secondary winding, C1：It is defeated
Enter capacitor, Cm：Direct current capacitors, C7, C7a, C7b, C7c, C7d：Smoothing capacity device.
Claims (16)
1. direct current is converted to height by a kind of supply unit with multiple cell translation devices, the cell translation device in rectifier
Direct current conversion is carried out via high frequency transformer after frequency, rectangle is generated with the DC voltage that the rectifier provides in inverter
Voltage, the supply unit are obtained being connected in series with as the rectangular voltage of the output of the inverter of multiple cell translation devices
To the exchange of low frequency, the supply unit is characterised by comprising：
Control unit possessed by each cell translation device is worth control and is used as corresponding cell translation based on the output order
The rectangular voltage of the output of device, and will be previously determined to be during the rectangular voltage for each cell translation device that
This different duration；
Detection forms the temperature detecting unit of the temperature of the switch element of the rectifier and the inverter；With
The output order of the difference of the temperature detected by the temperature detecting unit is reflected to the output of each described control unit
The control device of value,
In the difference for producing the temperature, it is previously determined to be by output order value change for each unit
It remains in operation during the rectangular voltage during converter is different from each other.
2. supply unit as described in claim 1, it is characterised in that：
When the temperature detecting unit detects high temperature, during the rectangular voltage for shortening the high cell translation device of temperature
And it remains in operation during extending the rectangular voltage of other cell translation devices.
3. supply unit as described in claim 1, it is characterised in that：
When the temperature detecting unit detects high temperature, reduce the size of the rectangular voltage of the high cell translation device of temperature
And the size for increasing the rectangular voltage of other cell translation devices remains in operation.
4. supply unit as claimed in claim 3, it is characterised in that：
During extending the rectangular voltage of the cell translation device for the size for reducing the rectangular voltage and shorten increasing
It remains in operation during the big rectangular voltage of the cell translation device of the size of the rectangular voltage.
5. such as supply unit according to any one of claims 1 to 4, it is characterised in that：
It monitors the temperature that the temperature detecting unit detects, when as defined in reaching more than limits value, turns corresponding unit
The rectifier of parallel operation stops.
6. supply unit as claimed in claim 5, it is characterised in that：
Smoothing capacity device, the list that rectifier has stopped being connected between the rectifier and inverter of the cell translation device
During the rectangular voltage in the inverter of first converter, reach defined limits value in the temperature detected
More than when be changed and be set as shorter during, and at the time of reaching before this period, perform from described in complete job
The processing of the smoothing capacity device charging for the cell translation device that cell translation device has stopped the rectifier.
7. direct current is converted to height by a kind of supply unit with multiple cell translation devices, the cell translation device in rectifier
Direct current conversion is carried out via high frequency transformer after frequency, rectangle is generated with the DC voltage that the rectifier provides in inverter
Voltage, the supply unit are obtained being connected in series with as the rectangular voltage of the output of the inverter of multiple cell translation devices
To the exchange of low frequency, the supply unit is characterized in that：
The inverter in the multiple cell translation device is between the rectifier with smoothing capacity device and with structure
The switch element for including anti-parallel diodes of electric bridge is helped,
The inverter is alternately iterated through during the time within 1 period of the exchange of the low frequency in varing proportions and is led
The electric current that logical or shutdown forms the switch element including anti-parallel diodes of full electric bridge and makes to flow in exchange side is not in institute
It states the first state that is flowed in smoothing capacity device and the anti-parallel diodes that include of full electric bridge is made up of on or off
Switch element and the second state that the electric current flowed in exchange side is made to be flowed up in the first party of the smoothing capacity device, and
When the temperature of the composition inverter or the switch element of the rectifier produces difference, change for each inversion
During the time of the different different proportion of device, shortening detects the inverter in the cell translation device of high temperature
The time of second state and extension be not detected the second state of the inverter in the cell translation device of high temperature when
Between.
8. supply unit as claimed in claim 7, it is characterised in that：
Make to detect that the rectifier in the cell translation device of high temperature stops in the multiple cell translation device, shorten with
The time of the second state of the inverter of rectifier connection stopped, and extend the institute in other described cell translation devices
The time of the second state of inverter is stated,
Become the inverter being connect with the rectifier stopped and including for full electric bridge is formed by or off
The switch element of anti-parallel diodes and make the electric current flowed in exchange side in the first direction phase with the smoothing capacity device
The third state that anti-second party flows up, and the inverter in other cell translation devices is made to become second shape
Thus state charges.
9. direct current is converted to height by a kind of supply unit with multiple cell translation devices, the cell translation device in rectifier
Direct current conversion is carried out via high frequency transformer after frequency, rectangle is generated with the DC voltage that the rectifier provides in inverter
Voltage, the supply unit are obtained being connected in series with as the rectangular voltage of the output of the inverter of multiple cell translation devices
To the exchange of low frequency, the supply unit is characterized in that：
The control device of each being set in multiple cell translation devices, is controlled such that in multiple cell translation devices
The output current of inverter is equal and the input current of rectifier is different.
10. supply unit as claimed in claim 9, it is characterised in that：
The cell translation utensil has temperature detecting unit, and the control device reduces temperature height based on the temperature information detected
Cell translation device input current and increase the input current of the low cell translation device of temperature.
11. supply unit as claimed in claim 9, it is characterised in that：
DC-link voltage is different between the control device is controlled such that multiple cell translation devices.
12. supply unit as claimed in claim 9, it is characterised in that：
The control device stops the switch motion of the rectifier of the high cell translation device of temperature based on the temperature information detected
Only.
13. supply unit as claimed in claim 12, it is characterised in that：
The cell translation device has capacitor between its rectifier and inverter, and the control device is from other cell translations
The inverter of device charges to the capacitor for including the cell translation device of rectifier stopped.
14. a kind of control method of supply unit, wherein the supply unit between rectifier and inverter with electricity
Multiple cell translation devices of container, the cell translation device are converted to direct current after high frequency via high frequency transformation in rectifier
Device carries out direct current conversion, and rectangular voltage, the supply unit are generated with the DC voltage that the rectifier provides in inverter
The exchange of low frequency is obtained using being connected in series with as the rectangular voltage of the output of the inverter of multiple cell translation devices, it is described
The control method of supply unit is characterized in that：
It is redefined for during the rectangular voltage of output as the cell translation device for each cell translation
Device duration different from each other, when the temperature of the composition rectifier and the switch element of the inverter produces difference, contracting
During the rectangular voltage of the high cell translation device of short temperature and extend the rectangular voltages of other cell translation devices
Period remains in operation.
15. the control method of supply unit as claimed in claim 14, it is characterised in that：
The rectifier of the cell translation device that making the temperature of the switch element becomes high temperature stops, and shortens the unit and turns
During the rectangular voltage of the inverter of parallel operation, and the phase of the rectangular voltage is not generated in the inverter
Between, it charges via the inverter of the cell translation device not stopped to the capacitor of the cell translation device.
16. a kind of control method of supply unit, wherein the supply unit between rectifier and inverter with electricity
Multiple cell translation devices of container, the cell translation device are converted to direct current after high frequency via high frequency transformation in rectifier
Device carries out direct current conversion, and rectangular voltage, the supply unit are generated with the DC voltage that the rectifier provides in inverter
The exchange of low frequency is obtained using being connected in series with as the rectangular voltage of the output of the inverter of multiple cell translation devices, it is described
Rectifier and inverter include the switch element for including anti-parallel diodes for forming full electric bridge, the control of the supply unit
Method is characterized in that：
When the temperature of the composition rectifier and the switch element of the inverter is high, stop the rectification of the cell translation device
Device forms the switch element including anti-parallel diodes of full electric bridge to make the electricity flowed in exchange side by or off
The first party flowed in smoothing capacity device flows up,
For 1 or more cell translation device of the complete job in the multiple cell translation device, it is made up of on or off
The switch element including anti-parallel diodes of full electric bridge and make the electric current flowed in exchange side in the smoothing capacity device
It is flowed up with the second party of first direction opposite direction.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2015212594 | 2015-10-29 | ||
| JP2015-212594 | 2015-10-29 | ||
| PCT/JP2016/074780 WO2017073150A1 (en) | 2015-10-29 | 2016-08-25 | Power supply device and control method therefor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108174625A true CN108174625A (en) | 2018-06-15 |
| CN108174625B CN108174625B (en) | 2019-11-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201680061181.6A Expired - Fee Related CN108174625B (en) | 2015-10-29 | 2016-08-25 | Power supply device and its control method |
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| Country | Link |
|---|---|
| JP (1) | JP6482676B2 (en) |
| CN (1) | CN108174625B (en) |
| WO (1) | WO2017073150A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110729875A (en) * | 2018-06-28 | 2020-01-24 | 株式会社日立制作所 | Power conversion device |
| CN111193413A (en) * | 2018-11-15 | 2020-05-22 | 航天科工惯性技术有限公司 | Power supply equipment and system for oil-water separation |
| CN111193414A (en) * | 2018-11-15 | 2020-05-22 | 航天科工惯性技术有限公司 | Environment self-adaptive oil-water separation power supply equipment and system |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11201559B2 (en) | 2017-06-14 | 2021-12-14 | Hitachi, Ltd. | Power conversion device and power conversion device connection method |
| US11323032B2 (en) | 2017-12-28 | 2022-05-03 | Shindengen Electric Manufacturing Co., Ltd. | Plural power modules conversion device with switch element control |
| JP6391897B1 (en) * | 2018-01-29 | 2018-09-19 | 三菱電機株式会社 | Series multiple inverter |
| JP6622442B1 (en) * | 2018-10-18 | 2019-12-18 | 株式会社東芝 | POWER CONVERSION DEVICE, POWER CONVERSION SYSTEM, POWER CONVERSION METHOD, AND PROGRAM |
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| JP2004064830A (en) * | 2002-07-25 | 2004-02-26 | Mitsubishi Electric Corp | Power converter |
| JP2012186907A (en) * | 2011-03-04 | 2012-09-27 | Yanmar Co Ltd | Electric working machine |
| CN203590045U (en) * | 2013-11-19 | 2014-05-07 | 青岛国林实业股份有限公司 | Power supply for ozone generator and ozone generator |
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| JP2000278958A (en) * | 1999-03-26 | 2000-10-06 | Mitsubishi Electric Corp | Power converter |
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2016
- 2016-08-25 JP JP2017547652A patent/JP6482676B2/en not_active Expired - Fee Related
- 2016-08-25 CN CN201680061181.6A patent/CN108174625B/en not_active Expired - Fee Related
- 2016-08-25 WO PCT/JP2016/074780 patent/WO2017073150A1/en active Application Filing
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004064830A (en) * | 2002-07-25 | 2004-02-26 | Mitsubishi Electric Corp | Power converter |
| JP2012186907A (en) * | 2011-03-04 | 2012-09-27 | Yanmar Co Ltd | Electric working machine |
| CN203590045U (en) * | 2013-11-19 | 2014-05-07 | 青岛国林实业股份有限公司 | Power supply for ozone generator and ozone generator |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110729875A (en) * | 2018-06-28 | 2020-01-24 | 株式会社日立制作所 | Power conversion device |
| CN110729875B (en) * | 2018-06-28 | 2021-09-07 | 株式会社日立制作所 | Power conversion device |
| CN111193413A (en) * | 2018-11-15 | 2020-05-22 | 航天科工惯性技术有限公司 | Power supply equipment and system for oil-water separation |
| CN111193414A (en) * | 2018-11-15 | 2020-05-22 | 航天科工惯性技术有限公司 | Environment self-adaptive oil-water separation power supply equipment and system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108174625B (en) | 2019-11-29 |
| JPWO2017073150A1 (en) | 2018-07-05 |
| WO2017073150A1 (en) | 2017-05-04 |
| JP6482676B2 (en) | 2019-03-13 |
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