CN101098108B - Electric power transformation device and method - Google Patents
Electric power transformation device and method Download PDFInfo
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- CN101098108B CN101098108B CN2007101262389A CN200710126238A CN101098108B CN 101098108 B CN101098108 B CN 101098108B CN 2007101262389 A CN2007101262389 A CN 2007101262389A CN 200710126238 A CN200710126238 A CN 200710126238A CN 101098108 B CN101098108 B CN 101098108B
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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
- 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
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc 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
- H02M1/00—Details of apparatus for conversion
- H02M1/0003—Details of control, feedback or regulation circuits
- H02M1/0009—Devices or circuits for detecting current in a converter
-
- 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
- H02M1/00—Details of apparatus for conversion
- H02M1/0067—Converter structures employing plural converter units, other than for parallel operation of the units on a single load
- H02M1/008—Plural converter units for generating at two or more independent and non-parallel outputs, e.g. systems with plural point of load switching regulators
-
- 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
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/40—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc
- H02M5/42—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters
- H02M5/44—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac
- H02M5/453—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal
- H02M5/458—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M5/4585—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only having a rectifier with controlled elements
-
- 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
- H02M7/487—Neutral point clamped inverters
-
- 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
- H02M7/493—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 the static converters being arranged for operation in parallel
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
- Control Of Ac Motors In General (AREA)
Abstract
A power converter device with three levels is provided. A bus at the intermediate potential arranges the resistor for the resonant inhibition at the converter side and the inverter side respectively, arranges the intermediate resistor at the converter side and the inverter side respectively and arranges the dc neutral point voltage controller at the converter side and the dc neutral point voltage controller. The dc neutral point voltage controller at the converter side applies the dc neutral point voltage between the resistor for the resonant inhibition at the converter side and the intermediate resistor at the converter side. The dc neutral point voltage controller applies the dc neutral point voltage between the resistor for the resonant inhibition at the inverter side and the intermediate resistor at the inverter side. The on/off the dc neutral points at the converter side and the inverter side is controlled based on the operation status by the switch judging portion. Thereby, the invention provides the power converter device with three levels able to inhibit the conversion of the dc neutral point voltage.
Description
Technical field
The present invention relates to power-converting device and electric power conversion method, relate in particular to and in so-called 3 level power converters, be suitable for power-converting device and the electric power conversion method that the change to the dc point voltage suppresses most.
Background technology
Generally, in order to drive alternating current motor etc. and the electrification converting means.As this power-converting device, 3 level power-converting devices especially in jumbo purposes, have been used.3 level power-converting devices are direct current through transducer with the power converter of AC power, through inverter with DC converting for exchanging, transducer is connected through dc bus with inverter.
Here; The direct current component of transducer side and inverter side does not have smmothing capacitor; When connecting through dc bus; Because of smmothing capacitor becomes branch with the inductance of dc bus resonance phenomena taking place, exists the problem that causes dc bus and smoothing capacity actuator temperature to rise because of resonance current thus.
As the method that addresses this problem; For example open in the 3 level power-converting devices shown in the 2001-238461 communique the spy; Align this intermediate potential bus in electrode potential bus, negative pole current potential bus, the intermediate potential bus, press from both sides in order to suppress resonance and establish resistor, so that suppress resonance current.
Patent documentation 1: the spy opens the 2001-238461 communique
When in inverter, especially 3 electrical level inverters, having carried out switch control; Dc point at inverter flows through electric current; Make the change of dc point voltage, exist to switch element apply the problem of excessive voltage and the motor output torque that causes by the output voltage distortion in the problem of pulsation takes place.Especially; When motor to run up and load current when big; The change of dc point voltage increases, and, in the intermediate potential bus, be provided with under the situation of resistor; Because of the change meeting of dc point voltage produces potential difference at the resistance two ends, also there is the problem of the super-high-current that flows in the resistance thus.
Summary of the invention
The objective of the invention is to, a kind of power-converting device and electric power conversion method that can reliably suppress the change of dc point voltage is provided.
To achieve these goals, a kind of power-converting device is provided in the present invention, comprises: transducer, its with exchange conversion be electronegative potential, than the high high potential of said electronegative potential and than said electronegative potential the high and intermediate potential lower than said high potential; And inverter, it will be via being applied as electronegative potential electric conductor for the voltage of said electronegative potential, being applied as to the high potential electric conductor of the voltage of said high potential and being applied as the voltage transformation supplied with for the intermediate potential electric conductor of the voltage of said intermediate potential for exchanging; This power-converting device also comprises: remain the control system that the mode of regulation is controlled said transducer according to the voltage of said intermediate potential electric conductor; And remain the control system that the mode of regulation is controlled said inverter according to the voltage of said intermediate potential electric conductor.Perhaps, power-converting device comprises: transducer, its with exchange conversion be electronegative potential, than the high high potential of said electronegative potential and than said electronegative potential the high and intermediate potential lower than said high potential; And inverter, it will be via being applied as electronegative potential electric conductor for the voltage of said electronegative potential, being applied as to the high potential electric conductor of the voltage of said high potential and being applied as the voltage transformation supplied with for the intermediate potential electric conductor of the voltage of said intermediate potential for exchanging; Said transducer and inverter all constitute the mode that can remain regulation according to the voltage with said intermediate potential electric conductor and control.
Perhaps, dc point voltage control system is set, comes the neutral point voltage control of switching converter side and inverter side according to operating condition in transducer side and inverter side both sides.And; As additive method; The resistance that in the intermediate potential bus, resonance is suppressed usefulness is set to transducer side and inverter side respectively; And, an interlaminated resistance is set between transducer side resistance and inverter side resistance again, make and can simultaneously and use the inverter side neutral point voltage control system of having utilized the transducer side neutral point control system of the neutral point voltage between transducer side resistance and the interlaminated resistance and having utilized the neutral point voltage between inverter side resistance and the interlaminated resistance.
According to the present invention, can reliably suppress the change of dc point voltage.
Description of drawings
Fig. 1 is the pie graph of the power-converting device of expression first embodiment of the invention;
Fig. 2 is the action diagram of the dc point voltage in first execution mode;
Fig. 3 be with first execution mode in the relevant flow chart of switching of dc point voltage control system;
Fig. 4 is the pie graph of the power-converting device of expression second embodiment of the invention;
Fig. 5 is the action diagram of the dc point voltage in second execution mode;
Fig. 6 is another pie graph of the power-converting device of expression second embodiment of the invention;
Fig. 7 is the another pie graph of the power-converting device of expression second embodiment of the invention;
Fig. 8 is the pie graph of the power-converting device of expression third embodiment of the invention;
Fig. 9 is the pie graph of the power-converting device of expression four embodiment of the invention;
Figure 10 is the pie graph of the power-converting device of expression fifth embodiment of the invention;
Figure 11 is the pie graph of the power-converting device of expression sixth embodiment of the invention.
Among the figure: the 1-AC power; The 2-converter unit; The 3-inverter unit; The 4-motor; The 5-converter control device; The 6-control device for inverter; 7,9-current detector; The 8-speed detector; 21-transducer portion; 22,23,32,33-smmothing capacitor; 24,34-resonance suppresses to use resistor; 25,26,35,36-dc voltage detector; 27,37,71-interlaminated resistance device; 28,29,38,39-direct voltage detection resistance device; The 31-inverter part; 41-transducer dish; The 42-inverter panel; The public dish of 43-; 51-direct voltage command generator; The 52-dc voltage controller; 53,63-current controller; 54,64-impulse generator; 55,65-dc point voltage controller; 56,66-switch; 61-speed command generator; The 62-speed control; 67-switching judging portion; 72-double as resonance suppresses to use and the separatory resistor of test point.
Embodiment
Below, utilize accompanying drawing, the best mode that is used to carry out an invention is described.
(embodiment 1)
Fig. 1 is a whole pie graph of the present invention.The 1st, AC power; The 2nd, the alternating electromotive force of said AC power 1 is converted into the converter unit of direct current power; The 3rd, the direct current power of said converter unit 2 outputs is transformed to the inverter unit of desirable electric power, the 4th, by power-actuated motor of said inverter unit 3 outputs.Said converter unit 2 suppresses the resistor 24 of usefulness by transducer portion 21, the smmothing capacitor 22,23 that is arranged on transducer side, resonance and the dc voltage detector 25,26 that direct voltage detects and exports is constituted.And said inverter unit 3 suppresses the resistor 34 of usefulness by inverter part 31, the smmothing capacitor 32,33 that is arranged on inverter side, resonance and the dc voltage detector 35,36 that direct voltage detects and exports is constituted.The 5th, the converter control device that the mode that becomes desirable value according to direct current power is operated said transducer portion 21, the 6th, the control device for inverter that the mode that satisfies desirable characteristic according to the output torque or the speed of said motor 4 is operated said inverter part 31.The 7th, current detector detects and exports the output current of said converter unit 2.The 8th, the speed detector that directly links with motor 4 detects and exports the speed of motor.The 9th, current detector detects and exports the output current of said inverter unit 3.The output signal of said current detector 7, dc voltage detector 25,26 is imported into converter control device 5, and converter control device 5 carries out various calculation process, the signal that output is operated said transducer portion 21.The output signal of said speed detector 8, current detector 9, dc voltage detector 35,36 is imported into control device for inverter 6, and control device for inverter 6 carries out various calculation process, the signal that output is operated said inverter part 31.
Below, the main action of each control device is described.At first; In converter control device 5; Be imported into dc voltage controller 52 from the direct voltage command value of direct voltage command generator 51 outputs and the dc voltage detection value of exporting from dc voltage detector 25,26; In dc voltage controller 52,, the converter output current command value is carried out computing and output according to the dc voltage detection value mode consistent with the direct voltage command value.Then; Said converter output current command value and the converter output current detected value of exporting from current detector 7 are imported into current controller 53; In current controller 53; According to the converter output current detected value mode consistent, the transducer voltage command value is carried out computing and output with the converter output current command value.Then; Said transducer voltage command value is imported into impulse generator 54; In impulse generator 54; According to the converter output voltage of transducer portion 21 mode consistent with the converter output voltage command value, computing is also exported the pulse signal to the switch element on/off that makes transducer portion 21.In control device for inverter 6; Be imported into speed control 62 from the speed value of speed command generator 61 outputs and the speed detected value of exporting from speed detector 8; In speed control 62, according to speed detected value mode computing and the output inverter output current command value consistent with speed value.Then; Said inverter output current command value and the inverter output current detected value of exporting from current detector 9 are imported into current controller 63; In current controller 63, according to inverter output current detected value mode computing and the output inverter voltage instruction value consistent with inverter output current detected value.Then; Said contravarianter voltage command value is imported into impulse generator 64; In impulse generator 64, according to the inverter output voltage of inverter part 31 mode consistent with the inverter output voltage command value, computing and output make the pulse signal of the switch element on/off of inverter part 31.
Then, the control action among the present invention is described.At first; In transducer side dc point voltage controller 55 is set; In dc point voltage controller 55; Dc voltage detection value according to from dc voltage detector 25,26 outputs comes computing dc point voltage detected value, is that zero compensation rate is carried out computing and output to said dc point voltage detected value.Said compensation rate is input to current controller 53 via the switch 56 that makes the input on/off that obtains current controller 53, in current controller 53, synthesizes with the transducer voltage command value of computing.On the other hand; At inverter side dc point voltage controller 65 is set too; In dc point voltage controller 65; Dc voltage detection value according to from dc voltage detector 35,36 outputs comes computing dc point voltage detected value, is that zero compensation rate is carried out computing and output to said dc point voltage detected value.Said compensation rate is input to current controller 63 via the switch 66 that makes the input on/off that obtains current controller 63, in current controller 63, synthesizes with the contravarianter voltage command value of computing.The 67th, switching judging portion, it is input to current controller to whether with the compensation rate of the dc point voltage controller institute computing of transducer side and inverter side and output and switches.To switching judging portion for example the speed detected value or the current detection value of input motor, according to Rule of judgment output switching signal.
Then, utilize accompanying drawing, necessity and the method for switching described.Fig. 2 is the figure of the action of indication circuit formation and dc point voltage.The neutral point voltage Vzc of transducer side shown in Figure 2 and the neutral point voltage Vzi of inverter side, neutral point current Izc, Izi and condenser capacity Cfc, Cfi based on flowing through the switch control of each converter are represented by (1), (2) formula.
[numerical expression 1]
And; The electric current I rci that flows in the inverter side resistor 34 of the electric current I rcc resonant inhibition usefulness that flows in the transducer side resistor 24 of resonance inhibition usefulness; Potential difference based on said dc point voltage Vzc, Vzi and dc point voltage common measurement electricity Vzd flows, and representes with (3), (4) formula.
[numerical expression 2]
Here,, then become (5) formula,, make Rcc=Rci, then become (6) formula in order to simplify if, ask for common measurement point Vzd by (3), (4) formula according to the relation of Ircc+Irci=0.
[numerical expression 3]
Can know that according to (6) formula the condition that Vzd=0 sets up is these two of Vzc=0 and Vzi=0 and Vzc=-Vzi.Promptly; In the mode that through public measuring point Vzd is zero according to the dc point voltage; The voltage instruction of operating each converter changes neutral point current Izc, Izi; And control transducer side and inverter side both sides and to make Vzc, when Vzi changes, as shown in Figure 2, though measuring point is controlled to be zero; But the dc point voltage Vzi of inverter side, the dc point voltage Vzc of transducer side may change, and exist that element to transducer side and inverter side applies overvoltage this moment or because of the problem of potential difference mobile super-high-current in the resistor 24,34 of resonance inhibition usefulness of transducer side and inverter side.Therefore, owing to can't therefore need switch simultaneously also with dc point voltage control system.Fig. 3 is the flow chart of an example of the changing method having represented in switching judging portion 67, to carry out.Owing to relative inverter side carries out the control of variable voltage, variable frequency for Motor Control, transducer side is certain frequency control, and the influence when therefore carrying out the dc point control is smaller.On the other hand; Switching frequency and the relation of motor frequency or the size of load current etc. according to inverter side; In the specified conditions or scope of inverter side; The dc point voltage changes sometimes, under this situation, in the dc point control of the inverter side that becomes the change essential factor, hopes to suppress change.Therefore; As shown in Figure 3; Usually use the dc point voltage control system of transducer side, judge by judging part 102 whether particular range, for example speed (frequency) that the change of dc point voltage increases set grade (level) greater than certain, and judge that by judging part 103 whether load current is greater than setting grade; When in 102 and 103 judging part, having satisfied condition; The signal that output is used the dc point voltage control system of inverter side in handling part 104, output is not used the signal of transducer side dc point voltage control system when using inverter side dc point voltage control system in handling part 105.When in judging part 102 and 103, not satisfying condition; The signal of the dc point voltage control system of inverter side is not used in output in handling part 106; Output is used the signal of transducer side dc point voltage control system when not using inverter side dc point voltage control system in handling part 107.Through according to 3 flow chart, in the specified conditions or scope of the dc point voltage change that makes inverter side, can use the neutral point voltage control system of inverter side, and can prevent and transducer side dc point voltage control system simultaneously and use.
Through using such power-converting device; Suppressed the change of dc point voltage reliably, can prevent to switch element apply excessive voltage the motor that caused by output voltage distortion output torque is pulsed or the resonance suppression resistor in mobile super-high-current.
(embodiment 2)
Fig. 4 is another embodiment of apparatus of the present invention; And the difference of Fig. 1 is: suppress at the resonance of intermediate potential bus between transducer side resistor 24 and the inverter side resistor 34 of usefulness interlaminated resistance device 27,37 to be set; And removed the switch 56 of transducer side, so that can be simultaneously and with having utilized the transducer side dc point voltage control system of the dc point voltage between transducer side resistor 24 and the interlaminated resistance device 27 and having utilized the inverter side dc point voltage control system of the dc point voltage between inverter side resistor 34 and the interlaminated resistance device 37.In Fig. 1, for switching converter side and inverter side, need carry out transfer of data to converter control device 5, and the inspection of the condition enactment when switching and the influence of transmission delay etc. is numerous and diverse from control device for inverter 6, thus not preferred.Therefore, in Fig. 4, through new interpolation interlaminated resistance device, the dc point voltage that transducer side and inverter side are controlled separates and independence, thereby can simultaneously and use.Then, utilize accompanying drawing, to simultaneously and the possibility of usefulness describe.Fig. 5 is the figure of the action of indication circuit formation and dc point voltage.The electric current I rcc that flows in the transducer side resistor 24 of resonance inhibition usefulness shown in Figure 5 and the interlaminated resistance device 27; Utilize the transducer side measuring point Vzcd of said dc point voltage Vzc and dc point voltage, public neutral point voltage Vzh; Represent by (7) formula; Equally; The electric current I rci that flows in the inverter side resistor 34 of resonance inhibition usefulness and the interlaminated resistance device 37 utilizes the inverter side measuring point Vzid of said dc point voltage Vzi and dc point voltage, public neutral point voltage Vzh, is represented by (8) formula.
[numerical expression 4]
Here,, then become (9) formula,, make Rhc=Rhi, then become (10) formula in order to simplify if, ask for common measurement point Vzh by (7), (8) formula according to the relation of Ircc+Irci=0.
[numerical expression 5]
Can know that according to (10) formula the condition that Vzh=0 sets up is these two of Vzcd=0 and Vzid=0 and Vzcd=-Vzid, but as shown in Figure 5; Since through to separate with inverter side in transducer side, independently individually the measuring point of dc point voltages is controlled; Make the voltage of interlaminated resistance device 27 and 37 be controlled as zero, so streaming current not in interlaminated resistance device 27 and 37, so; Also streaming current not in the resistor 24 of transducer side and the inverter side resistor 34; Can all dc point voltages be controlled to be zero, thus can be simultaneously and usefulness, do not need the switch 56 of transducer side.In addition, as stated, can also select the dc point voltage of inverter side in the scope of needs according to the mode of considering the influence of Motor Control is only used.Therefore, in the present embodiment, do not need the handling part 105 and 107 in the flow chart of Fig. 3,, the dc point voltage control system of inverter side is connected in the scope of needs got final product as long as the dc point voltage control system of transducer side is connected all the time.
And, as shown in Figure 6, be unit configuration interlaminated resistance device 27,37 not according to each unit, also can obtain same effect but dispose the interlaminated resistance device 71 that is integrated into.And, further make the resistor and the interlaminated resistance device of resonance inhibition usefulness general, adopt formation shown in Figure 7 also can obtain equal effect.Under this situation, can reduce the quantity of resistor.
Through using such power-converting device, can avoid numerous and diverse degree of switching, can suppress the change of dc point voltage simple and reliablely, obtain and the equal effect of Fig. 1.
(embodiment 3)
Fig. 8 is another embodiment of the present invention, is with the difference of Fig. 4: a plurality of inverters are connected with the public translation device.In addition, when constituting a plurality of inverter like this, by each configuration of cells interlaminated resistance device.Through such configuration as shown in Figure 8; Can make the dc point voltage of controlling at transducer side and each inverter side separate, independent; And also can make the dc point voltage of between each inverter and inverter, controlling separate, independent, therefore can be simultaneously and with all dc point voltage control system.
Through using such power-converting device, be provided with during system that a plurality of inverters are connected with the public translation device constitutes, also can avoid numerous and diverse degree of switching, can suppress the change of dc point voltage simple and reliablely, obtain and the equal effect of Fig. 1.
(embodiment 4)
Fig. 9 is another embodiment of apparatus of the present invention; Be with the difference of Fig. 4: interlaminated resistance device 71 or 27,37 is not set; And the resonance that direct voltage is detected resistor 28,29 and the transducer side of usefulness suppresses to be connected in parallel with resistor 24; The resonance that direct voltage is detected resistor 38,39 and the inverter side of usefulness suppresses to be connected in parallel with resistor 34, can be simultaneously and with the transducer side dc point voltage control system of having utilized the dc point voltage between direct voltage detection resistance device 28 and the direct voltage detection resistance device 29 with utilized the direct voltage detection to hinder the inverter side dc point voltage control system that device 38 and direct voltage detection hinder the dc point voltage between the device 39.Usually, for resonance suppress with and the resistor 24,34 that is provided with owing to be designed to tolerates when common and electric current during short circuit, so capacity is big, size and cost are also big.So, because the interlaminated resistance device that in Fig. 4, appends setting also adopts same design, therefore be provided with aspect position and the cost not preferred.Given this, in Fig. 9, two resistors that voltage detecting is used append respectively and are arranged on transducer side and inverter side.Through increasing the resistance value of the resistor appended, can reduce to append the electric current that flows in the resistor, thereby can solve in the problem that is provided with aspect position and the cost.On the other hand; For the voltage aspect; Between direct voltage detection resistance device 28 and direct voltage detection resistance device 38, be provided with interlaminated resistance device (direct voltage detection resistance device 29 and direct voltage detection resistance device 39 sums); Same with Fig. 4, through the dc point voltage that transducer side and inverter side are controlled separate, independent, thereby can simultaneously and use.
Through using such power-converting device, can solve the problem that position and cost aspect are set of resistor, can suppress the change of dc point voltage, acquisition and Fig. 1, the equal effect of Fig. 4 simple and reliablely.
(embodiment 5)
Figure 10 is an alternative embodiment of the invention, is with the difference of Fig. 9: a plurality of inverters are connected with the public translation device.Through such configuration shown in figure 10; The dc point voltage that transducer side and each inverter side are controlled separates, independence; And also can make the dc point voltage of between each inverter and inverter, controlling separate, independent, therefore can be simultaneously and with all dc point voltage control system.
Through using such power-converting device; Be provided with during system that a plurality of inverters are connected with the public translation device constitutes; Also can solve the problem that position and cost aspect are set of resistor, thereby can suppress the change of dc point voltage simple and reliablely, obtain and the equal effect of Fig. 9.
(embodiment 6)
Figure 11 is an alternative embodiment of the invention; Transducer in the transducer dish 41 is made up of a plurality of converter unit 2-1,2-2,2-3; The resonance inhibition that the direct voltage of parallel operation side is detected resistor 28-1,28-2,28-3 and each converter unit of usefulness is connected in parallel with resistor 24-1,24-2,24-3, and the node of said resistor and the dc point voltage between the resistor 29 are measured.And; At inverter side too; Inverter in the inverter panel 42 is made up of a plurality of inverter unit 3-1,3-2,3-3; The resonance inhibition that the direct voltage of inverter side is detected resistor 38-1,38-2,38-3 and each inverter unit of usefulness is connected in parallel with resistor 34-1,34-2,34-3, and the node of said resistor and the dc point voltage between the resistor 39 are measured.And be with the difference of Fig. 5: the for example public dish 43 different with transducer dish 41 and inverter panel 42 is set, and the direct voltage of wherein taking in transducer side, inverter side detects the resistor and the dc voltage detector 25,26,35,36 of usefulness.Usually; Because in transducer dish 41 and inverter panel 42; Therefore utilize switch element to connect, break off high voltage, carry out voltage control thus, may cause the deterioration of measuring environment by switching noise etc.; Especially in the mensuration circuit of the tiny signal that has used the high resistance device, do not hope under described environment, to measure.So, in Figure 11, be arranged in the dish different with transducer dish 41 and inverter panel 42 with measuring circuit.Through such setting, the misoperation that can prevent to cause etc. by the deterioration of measuring environment.
Through using such power-converting device, can prevent to cause the deterioration of measuring environment, thereby can suppress the change of dc point voltage simple and reliablely by switching noise etc.In addition, this mode also can be applicable in the public translation device mode as Figure 10.
Claims (13)
1. power-converting device comprises: transducer, its with exchange conversion be electronegative potential, than the high high potential of said electronegative potential and than said electronegative potential the high and intermediate potential lower than said high potential; And inverter, it will be via being applied as electronegative potential electric conductor for the voltage of said electronegative potential, being applied as to the high potential electric conductor of the voltage of said high potential and being applied as the voltage transformation supplied with for the intermediate potential electric conductor of the voltage of said intermediate potential for exchanging;
Said transducer and inverter all constitute the mode that can remain regulation according to the voltage with said intermediate potential electric conductor and control,
Middle current potential electric conductor is provided with resistor, according to the intermediate voltage control system of operating condition switching converter side and the intermediate voltage control system of inverter side.
2. power-converting device comprises: transducer, its with exchange conversion be electronegative potential, than the high high potential of said electronegative potential and than said electronegative potential the high and intermediate potential lower than said high potential; And inverter, it will be via being applied as electronegative potential electric conductor for the voltage of said electronegative potential, being applied as to the high potential electric conductor of the voltage of said high potential and being applied as the voltage transformation supplied with for the intermediate potential electric conductor of the voltage of said intermediate potential for exchanging;
This power-converting device also comprises: remain the control system that the mode of regulation is controlled said transducer according to the voltage of said intermediate potential electric conductor; And the mode that remains regulation according to the voltage with said intermediate potential electric conductor control system that said inverter is controlled,
First voltage end by the intermediate potential electric conductor of control system that said transducer is controlled control of intermediate potential electric conductor, with second voltage end of the intermediate potential electric conductor of controlling by the control system of inverter side between, a resistor is set at least.
3. power-converting device comprises: transducer, its with exchange conversion be electronegative potential, than the high high potential of said electronegative potential and than said electronegative potential the high and intermediate potential lower than said high potential; And inverter, it will be via being applied as electronegative potential electric conductor for the voltage of said electronegative potential, being applied as to the high potential electric conductor of the voltage of said high potential and being applied as the voltage transformation supplied with for the intermediate potential electric conductor of the voltage of said intermediate potential for exchanging;
In transducer side and inverter side the resistor that resonance suppresses usefulness is set respectively, suppresses to suppress to use resistor with resistor and inverter side resonance as transducer side resonance,
Between said transducer side resonance suppresses to suppress with resistor with resistor and said inverter side resonance, the interlaminated resistance device is set,
Be provided with said transducer side resonance is suppressed transducer side dc point voltage control system of controlling with the dc point voltage between resistor and the said interlaminated resistance device and the inverter side dc point voltage control system that said inverter side resonance inhibition is controlled with the dc point voltage between resistor and the said interlaminated resistance device.
4. power-converting device according to claim 3 is characterized in that,
In transducer side and inverter side the interlaminated resistance device is set respectively,
Be provided with transducer side resonance is suppressed transducer side dc point voltage control system of controlling with the dc point voltage between resistor and the transducer side interlaminated resistance device and the inverter side dc point voltage control system that inhibition is controlled with the dc point voltage between resistor and the inverter side interlaminated resistance device to inverter side resonance.
5. power-converting device according to claim 3 is characterized in that,
Make inverter side dc point voltage control system connect, break off according to operating condition.
6. power-converting device comprises: the public translation device, its with exchange conversion be electronegative potential, than the high high potential of said electronegative potential and than said electronegative potential the high and intermediate potential lower than said high potential export; And a plurality of inverters; It carries out conversion to the voltage of supplying with via electronegative potential electric conductor, high potential electric conductor and intermediate potential electric conductor; The output that said electronegative potential electric conductor is applied in said transducer becomes the voltage of said electronegative potential; Said high potential electric conductor is applied as the voltage into said high potential, and said intermediate potential electric conductor is applied as the voltage into said intermediate potential;
This power-converting device also comprises: remain the control system that the mode of regulation is controlled said transducer according to the voltage of each said intermediate potential electric conductor; And the mode that remains regulation according to the voltage that makes each said intermediate potential electric conductor control system that said inverter is controlled,
Each said intermediate potential electric conductor is provided with resistor, switches control system that said transducer is controlled and the control system that said inverter is controlled according to operating condition.
7. a power-converting device will be transformed to interchange through a plurality of inverter power by the voltage after the conversion of public translation device,
Transducer side resonance is set respectively in the intermediate potential bus that connects said transducer and said inverter suppresses to suppress to use resistor with resistor and inverter side resonance,
And then, in said intermediate potential bus, between said transducer side resonance suppresses to suppress with resistor with resistor and said inverter side resonance, transducer side interlaminated resistance device and inverter side interlaminated resistance device are set respectively,
Be provided with to each inverter: said transducer side resonance is suppressed transducer side dc point voltage control system of controlling with the dc point voltage between resistor and the said transducer side interlaminated resistance device and the inverter side dc point voltage control system that said inverter side resonance inhibition is controlled with the dc point voltage between resistor and the said inverter side interlaminated resistance device.
8. a power-converting device will be transformed to interchange through inverter power by the voltage after the transducer conversion,
Transducer side resonance is set in the intermediate potential bus that connects said transducer and inverter suppresses to suppress to use resistor with resistor and inverter side resonance,
Suppress with parallelly connected transducer side dc point voltage detection resistance device and the transducer medial side dc point voltage detection resistance device that is provided for detecting transducer side dc point voltage of resistor with said transducer side resonance,
Suppress with parallelly connected inverter side dc point voltage detection resistance device and the inverter medial side dc point voltage detection resistance device of being provided with of resistor with inverter side resonance,
The power converting apparatus comprising: a DC converter side of said neutral-point voltage detecting resistor and said intermediate side DC converter neutral point voltage detecting resistor between the neutral point voltage of the DC converter for controlling neutral point side DC voltage control system, and the inverter side DC neutral point voltage detecting resistor in series with the DC side of the inverter intermediate neutral point voltage detecting resistor between the neutral point of the DC voltage control of the inverter side DC neutral point voltage control system.
9. power-converting device; To be transformed to interchange through a plurality of inverter power by the voltage after the conversion of public translation device; In the intermediate potential bus that connects said transducer and said inverter, being respectively arranged with transducer side resonance suppresses to suppress to use resistor with resistor and inverter side resonance
Suppress with parallelly connected transducer side dc point voltage detection resistance device and the transducer medial side resistor that is provided for detecting transducer side dc point voltage of resistor with said transducer side resonance,
In order to detect inverter side dc point voltage, suppress with parallelly connected inverter side dc point voltage detection resistance device and the inverter medial side dc point voltage detection resistance device of being provided with of resistor with each said inverter side resonance respectively,
The power converting apparatus includes: a DC converter side of said neutral-point voltage detecting resistor and said converter between the intermediary of the DC resistance of the neutral point voltage control of the converter side direct-current voltage of the neutral point control systems, and each of the neutral point side of the inverter DC voltage detecting resistor with each of said intermediate side DC inverter neutral point voltage detecting resistor between the neutral point of the DC control voltage DC inverter side neutral point voltage control system.
10. power-converting device; It is connected in parallel a plurality of power converters unit and constitutes transducer and inverter; The transducer side resonance inhibition that in the intermediate potential bus of each power converter unit, is respectively arranged with each unit of transducer side is used resistor with the inverter side resonance inhibition of each unit of resistor and inverter side
Transducer side and medial side in each unit suppress to be provided with resistor with the transducer side resonance of each unit of said transducer side parallelly connectedly and detect transducer side dc point voltage and hinder device with resistor and medial side dc point voltage detection,
Inverter side and medial side in each unit suppress to be provided with resistor with the inverter side resonance of each unit of said inverter side parallelly connectedly and detect inverter side dc point voltage and hinder device with resistor and medial side dc point voltage detection,
Set up the connection of each unit converter side current neutral-point voltage detecting resistor and the intermediary node voltage neutral point current detecting resistor between the neutral point of the DC voltage for controlling the current in the converter side the neutral point voltage control system, and the units connected to the DC side of the inverter neutral point voltage detecting resistor and the intermediary node voltage neutral point current detecting resistor between the neutral point of the DC voltage control of the inverter side DC neutral point voltage control system.
11. power-converting device according to claim 10 is characterized in that,
Be provided with transducer side dc point voltage detection resistance device and transducer side dc point voltage detector with the different position of transducer dish that is used to take in transducer, hindering device and inverter side dc point voltage detector being provided with inverter side dc point voltage detection with the different position of inverter panel that is used to take in inverter.
12. electric power conversion method; By transducer with exchange conversion be electronegative potential, than the high high potential of said electronegative potential and than said electronegative potential the high and intermediate potential lower than said high potential; Will be by inverter via being applied as electronegative potential electric conductor, being applied as to the high potential electric conductor of the voltage of said high potential and to be applied as the voltage transformation of supplying with for the intermediate potential electric conductor of the voltage of said intermediate potential be interchange for the voltage of said electronegative potential
The mode that remains regulation according to the voltage of said intermediate potential electric conductor is controlled said transducer, and the mode that remains regulation according to the voltage of said intermediate potential electric conductor is controlled said inverter,
Middle current potential electric conductor is provided with resistor, according to the intermediate voltage control system of operating condition switching converter side and the intermediate voltage control system of inverter side.
13. electric power conversion method; By transducer with exchange conversion be electronegative potential, than the high high potential of said electronegative potential and than said electronegative potential the high and intermediate potential lower than said high potential; Will be by inverter via being applied as electronegative potential electric conductor, being applied as to the high potential electric conductor of the voltage of said high potential and to be applied as the voltage transformation of supplying with for the intermediate potential electric conductor of the voltage of said intermediate potential be interchange for the voltage of said electronegative potential
Said transducer and inverter all move according to the mode that the voltage of said intermediate potential electric conductor remains regulation,
Middle current potential electric conductor is provided with resistor, according to the intermediate voltage control system of operating condition switching converter side and the intermediate voltage control system of inverter side.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2006-177487 | 2006-06-28 | ||
| JP2006177487A JP4466618B2 (en) | 2006-06-28 | 2006-06-28 | Power conversion device and power conversion method |
| JP2006177487 | 2006-06-28 |
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| Publication Number | Publication Date |
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| CN101098108A CN101098108A (en) | 2008-01-02 |
| CN101098108B true CN101098108B (en) | 2012-11-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2007101262389A Expired - Fee Related CN101098108B (en) | 2006-06-28 | 2007-06-26 | Electric power transformation device and method |
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| Country | Link |
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| JP (1) | JP4466618B2 (en) |
| KR (1) | KR101093288B1 (en) |
| CN (1) | CN101098108B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CA2734699C (en) * | 2008-08-22 | 2014-03-25 | Toshiba Mitsubishi-Electric Industrial Systems Corporation | Power conversion apparatus |
| KR101025647B1 (en) * | 2009-08-28 | 2011-03-30 | 엘에스산전 주식회사 | Apparatus and method for controlling high voltage inverter |
| US20140177294A1 (en) * | 2011-08-23 | 2014-06-26 | General Electric Company | Systems and methods for suppressing resonances in power converters |
| WO2013051100A1 (en) | 2011-10-04 | 2013-04-11 | 三菱電機株式会社 | Elevator control device |
| JP6035845B2 (en) * | 2012-04-26 | 2016-11-30 | 富士電機株式会社 | AC power supply system |
| US10340864B2 (en) | 2012-05-04 | 2019-07-02 | Infineon Technologies Ag | Transmitter circuit and method for controlling operation thereof |
| US9231789B2 (en) * | 2012-05-04 | 2016-01-05 | Infineon Technologies Ag | Transmitter circuit and method for operating thereof |
| JP5947109B2 (en) * | 2012-05-24 | 2016-07-06 | 株式会社日立製作所 | Uninterruptible power supply, control method of uninterruptible power supply |
| KR101343428B1 (en) | 2012-08-01 | 2013-12-19 | 아주대학교산학협력단 | Neutral point voltage controller and method of three-level inverter using dpwm |
| JP6516299B2 (en) * | 2016-07-27 | 2019-05-22 | 東芝三菱電機産業システム株式会社 | Power converter and control method thereof |
| JP6817881B2 (en) * | 2017-04-21 | 2021-01-20 | 株式会社日立製作所 | Power converter and abnormality detection method |
| JP6950604B2 (en) * | 2018-03-26 | 2021-10-13 | トヨタ自動車株式会社 | Voltage converter, vehicle and voltage converter control method using voltage converter |
| JP6895921B2 (en) * | 2018-04-23 | 2021-06-30 | 株式会社日立製作所 | Power converter and abnormality detection method |
| JP7068024B2 (en) * | 2018-05-01 | 2022-05-16 | 株式会社日立製作所 | Power converter and abnormality detection method |
| CN112189302B (en) * | 2018-11-20 | 2024-02-13 | 东芝三菱电机产业系统株式会社 | Uninterruptible power supply device |
| JP7103524B2 (en) * | 2019-07-23 | 2022-07-20 | 東芝三菱電機産業システム株式会社 | Multiple power conversion system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4984147A (en) * | 1989-05-12 | 1991-01-08 | Mitsubishi Denki Kabushiki Kaisah | Control method for PWM converter |
| CN2444341Y (en) * | 2000-08-04 | 2001-08-22 | 北京天宠电力技术有限公司 | High voltage electric power changer with pulsewidth modulation |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3341047B2 (en) * | 1996-01-09 | 2002-11-05 | 株式会社日立製作所 | Multi-level power converter |
| JPH10191640A (en) * | 1996-12-26 | 1998-07-21 | Hitachi Ltd | Controller for converter |
| JP3407198B2 (en) * | 2000-02-25 | 2003-05-19 | 株式会社日立製作所 | Three-level inverter device |
| JP2003070263A (en) * | 2001-08-23 | 2003-03-07 | Hitachi Ltd | Three-level inverter device |
| JP3856689B2 (en) * | 2001-11-30 | 2006-12-13 | 東芝三菱電機産業システム株式会社 | Neutral point clamp type power converter controller |
-
2006
- 2006-06-28 JP JP2006177487A patent/JP4466618B2/en not_active Expired - Fee Related
-
2007
- 2007-06-26 CN CN2007101262389A patent/CN101098108B/en not_active Expired - Fee Related
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4984147A (en) * | 1989-05-12 | 1991-01-08 | Mitsubishi Denki Kabushiki Kaisah | Control method for PWM converter |
| CN2444341Y (en) * | 2000-08-04 | 2001-08-22 | 北京天宠电力技术有限公司 | High voltage electric power changer with pulsewidth modulation |
Also Published As
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| KR20080001642A (en) | 2008-01-03 |
| JP2008011606A (en) | 2008-01-17 |
| KR101093288B1 (en) | 2011-12-14 |
| JP4466618B2 (en) | 2010-05-26 |
| CN101098108A (en) | 2008-01-02 |
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