CN110506387A - Electric current for being connected to the inverter of common bus reduces system - Google Patents
Electric current for being connected to the inverter of common bus reduces system Download PDFInfo
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- CN110506387A CN110506387A CN201880024984.3A CN201880024984A CN110506387A CN 110506387 A CN110506387 A CN 110506387A CN 201880024984 A CN201880024984 A CN 201880024984A CN 110506387 A CN110506387 A CN 110506387A
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- frequency
- inverter
- switch periods
- inverters
- controller circuitry
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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
- H02M7/53—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 using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/537—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 using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
- H02M7/5387—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 using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
- B60L15/02—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles characterised by the form of the current used in the control circuit
-
- 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
- H02M1/14—Arrangements for reducing ripples from dc input or output
- H02M1/15—Arrangements for reducing ripples from dc input or output using active elements
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
- H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
- H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters
- H02P27/08—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters with pulse width modulation
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
- H02P29/50—Reduction of harmonics
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P5/00—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors
- H02P5/74—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors controlling two or more ac dynamo-electric motors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2210/00—Converter types
- B60L2210/40—DC to AC converters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2220/00—Electrical machine types; Structures or applications thereof
- B60L2220/40—Electrical machine applications
- B60L2220/42—Electrical machine applications with use of more than one motor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/40—Drive Train control parameters
- B60L2240/52—Drive Train control parameters related to converters
- B60L2240/529—Current
-
- 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
-
- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
-
- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/72—Electric energy management in electromobility
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Inverter Devices (AREA)
Abstract
System and method described herein is related to electronic circuit.Provide a kind of system (for example, inverter current system).The system comprises the multiple inverters for being connected to common bus He at least one capacitor, the inverter is configured as that alternating current (AC) will be converted to by the DC current of common bus (DC) by making the different switches of the multiple inverter be alternately disconnection and closed state in the correspondence switch periods of each inverter.The system comprises controller circuitrys.The controller circuitry is configured as adjusting the electric current for being transmitted to the inverter on the common bus, so that the root mean square of the electric current meets one or more specified values.The controller circuitry controls the inverter so that frequency displacement to be applied to the corresponding switch periods of one or more inverters.
Description
Technical field
The embodiment of subject matter disclosed herein is related to electronic circuit.
Background technique
Vehicle propulsion system may include the multiple traction invertors for being connected to common bus.In addition, certain dynamical systems
There may be the multiple assistant load inverters for being connected to common bus.During the operation of vehicle propulsion system, with public
Switching frequency drives inverter.In addition, inverter transmits root mean square (RMS) electric current along common bus.DC link filter capacitor
It is conductively coupled with common bus.Based on the amount of the RMS current conducted along common bus, the ruler of DC link filter capacitor is selected
Very little and/or cost.
Summary of the invention
In one embodiment, a kind of system (such as inverter current system) is provided.System is public total including being connected to
Multiple inverters of line and at least one capacitor.The multiple inverter is configured as by making the multiple inverter not
It is alternately disconnection and closed state in the correspondence switch periods of each inverter with switch, the direct current of common bus will be passed through
Stream (DC) is converted to alternating current (AC).The system includes controller circuitry.Controller circuitry is configured as adjustment common bus
On be transmitted to the electric current of inverter so that the root mean square of electric current meets one or more specified values.Controller circuitry control is inverse
Become device, frequency displacement is applied to the respective switch period of one or more inverters.
In one embodiment, (for example, to reduce the electric current of inverter system) is provided a method.This method includes true
Surely it is connected to the quantity of common bus and the inverter of at least one capacitor.The multiple inverter is configured as by making
It is disconnection and closed state that the different switches for stating multiple inverters replace in the correspondence switch periods of each inverter, will pass through public affairs
The DC current (DC) of bus is converted to alternating current (AC) altogether.Method includes the switch determined for one or more inverters
The frequency displacement in period.Frequency displacement is determined based on the quantity of inverter.This method further comprises will be to the electricity conducted on common bus
The frequency displacement of stream is applied to the switch periods of one or more inverters, so that the root mean square of electric current meets one or more specified marks
It is quasi-.
In one embodiment, a kind of system (for example, inverter current system) is provided.The system is public including being connected to
Multiple inverters of bus and at least one capacitor.The multiple inverter is configured as by making the multiple inverter
Difference switch is alternately disconnection and closed state in the correspondence switch periods of each inverter, will pass through the direct current of common bus
Electric current (DC) is converted to alternating current (AC).The system includes controller circuitry.Controller circuitry is configured as adjustment public
The electric current of inverter is transmitted in bus, so that the root mean square of electric current meets one or more specified values.Controller circuitry control
Frequency displacement is applied to the respective switch period of one or more inverters by inverter processed.Controller circuitry is configured as passing through
Apply frequency displacement below, i.e., the switch periods of two or more inverters are in the arteries and veins for being expressed as being transmitted by controller circuitry
The different frequency of width modulation.
Detailed description of the invention
With reference to attached drawing, by the description for reading following non-limiting embodiment, it will more fully understand master as described herein
Topic, in which:
Fig. 1 shows the embodiment of inverter current system；
Fig. 2 shows the embodiments of inverter shown in Fig. 1；
Fig. 3 shows switch periods R, Y, B according to the inverter of public pulse-width signal；
Fig. 4 is the diagram of the embodiment of the electric current conducted by the capacitor of inverter current system shown in Fig. 1；
Fig. 5 is the diagram of the embodiment of the amplitude spectrum of the electric current conducted shown in Fig. 4 by capacitor；
Fig. 6 is the figure of the embodiment of the frequency displacement electric current conducted by the capacitor of inverter current system shown in Fig. 1
Show；
Fig. 7 is the diagram of the embodiment of the amplitude spectrum of the electric current conducted shown in Fig. 6 by capacitor；And
Fig. 8 is the flow chart for the method for reducing the electric current of inversion system.
Specific embodiment
One or more embodiments of invention described herein theme provide system and method, including are connected to common bus
Multiple inverters.Inverter is configured as being converted into the DC current (DC) conducted by common bus with a switching frequency
AC, because the out of phase of the AC is exported from the multiple inverter.Controller circuitry is configured as utilizing pulsewidth modulation
(PWM) signal adjusts inverter, to change the phase of the AC exported from inverter.The output of inverter includes root mean square
(RMS) electric current.Controller circuitry can be configured as to adjust RMS current to the frequency of the pwm signal of inverter.
For example, in one embodiment, controller circuitry is configured as propagating the harmonic current frequency spectrum of pwm signal.
Embodiment described herein at least one technical effect reduce RMS current, be enable to using smaller
And/or the lower DC link capacitor of effect.
Fig. 1 shows the embodiment of inverter current system 100.System 100 includes multiple inverters with circuit 106
104 (" inverter #1 ", " inverter #2 ", " inverter #3 ", " inverter #4 ", " inverter #5 " and " inverter #6 " in Fig. 1)
The controller circuitry 102 being operably connected.System 100 can be a part of vehicle.Vehicle can indicate to generate tractive force
To promote the motive force of vehicle to generate Vehicular system along route.In one example, vehicle can be the track of such as locomotive
Vehicle, but optionally can be another type of Vehicular system.For example, vehicle can be another type of off highway vehicle
(for example, the vehicle for not being designed and/or not allowing to travel on public way), or can be automobile, mine vehicle etc..
Additionally or alternatively, system 100 may include or can be stational system (stationary system), such as generate electricity
Machine.
Controller circuitry 102 can be connect via one or more wiredly and/or wirelessly connections with inverter 104, to allow
The monitoring of controller circuitry 102 and/or the operation of control inverter 104, as described herein.Controller circuitry 102 can be configured
For the switch periods for controlling inverter l04.Switch periods can be determined by a series of pwm signals that controller circuitry 102 generates
Justice.Pwm signal can be the digital signal of the switch in adjustment inverter 104, such as square wave.It can be along extremely corresponding inverter
104 wiredly and/or wirelessly connection receives pwm signal from controller circuitry 102.Optionally, pwm signal can be asynchronous letter
Number.Controller circuitry 102 includes hardware circuit, which includes and/or be connected to and execute the one of operation described herein
A or multiple processors (for example, microprocessor, field programmable gate array and/or integrated circuit).Circuit 106 is indicated along public affairs
One or more hardware circuits that power supply 110 is connect by bus 112,114 with inverter 104 altogether.Power supply 110 can indicate can
It is that inverter 104 provides one or more equipment of electric current, such as exchanges hair with what engine coupled along common bus 112,114
Motor and/or dc generator, one or more battery, and/or similar devices.Common bus may include positive bus 112,
The positive part of DC can be transmitted to inverter 104 from power supply；And negative bus 114, the negative part of DC can be transmitted to
Between power supply 110 and inverter 104.Bus 112,114 can be referred to as common bus, because multiple inverters 104 pass through phase
Same positive dc bus 112 and identical negative DC bus 114 is connect with power supply 110.In one embodiment, bus 112,114 is each
From can be single electric conductor or path or multiple electric conductors or path, and inverter is connected in parallel with each other to bus.
DC is transmitted to inverter 104 from power supply 110 by circuit 106, and DC is converted into exchange (AC) by inverter 104, and AC is mentioned
Supply multiple load 116 (" load #1 ", " load #2 ", " load #3 ", " load #4 ", " load #5 " and " load # in Fig. 1
6").Load 116 can indicate to utilize the various equipment to work from the received AC of inverter 104.For example, load 116 can be with
Indicate traction electric machine, fan motor (for example, hair dryer), cooling system, heating system, compressor etc..As an example, it mentions
Multiple inverters 104 shown in FIG. 1 and/or load 116 are supplied.It is alternatively possible to use as few as two inverters or more than six
A inverter.For example, system 100 may include 14 inverters 104 and/or load 116.
Controller circuitry 102 and power supply 110 can be by one or more wiredly and/or wirelessly connections come communicatedly coupling
It closes.The operation that controller circuitry 102 can be exported based on the input of power supply 110 and/or from power supply 110 to monitor power supply 110.
For example, (input throttle can be arranged based on the input throttle of motor (for example, load) in controller circuitry 102
Setting 116 electric currents needed for power supply 110) are loaded to determine.
The operation of inverter 104 just and/or on negative DC common bus 112,114 can generate or induce ripple voltage
Or ripple current.Capacitor or other capacitive elements 120 can connect in positive DC common bus 112 and negative DC common bus 114
Between, with the variation of smooth (for example, reduction) ripple voltage or electric current.For example, capacitor 120 can be DC link filter electricity
Container.It is noted that circuit 106 may include more than one capacitor 120.
Optionally, system 100 may include the inverter sensor 118 for monitoring one or more characteristics of inverter 104.
In one embodiment, inverter sensor 118 includes that measurement passes through one or more common bus 112,114 from power supply 110
It is transmitted to the voltmeter or ammeter of the voltage and or current of inverter 104.As shown in Figure 1, each inverter 104 can have
There is the inverter sensor 118 for being connected to inverter 104, so that controller circuitry 102 monitors the characteristic of each inverter 104.
Inverter sensor 118 be configured as measurement be supplied to the voltage of inverter 104 and/or the electric current that is exported by inverter 104 and/
Or voltage.For example, inverter sensor 118 can couple between positive dc bus 112 and inverter 104 with inverter 104, with
Input voltage or electric current are measured, and one or more additional inverter sensors 118 can be between inverter 104 and load
It is coupled with inverter 104, to measure the AC of the output of inverter 104.
Fig. 2 shows the embodiments of inverter 104 shown in FIG. 1.Inverter 104 can be with three groups or three branches
200, the two-stage inverter of 202,204 positive switch 206 and negative switch 208.Each branch 200 of the formation of switch 206,208,
202, it 204 is connect with positive dc bus 112 and negative DC bus 114, and will be converted to and be conducted along the received DC of positive dc bus
To a phase of the AC of load 116.
Three groups formed by switch 206,208 or three branches 200,202,204 in inverter will be along identical
The received DC of positive dc bus is converted to the three different phases for the AC for being supplied to load.Just opening in each branch of inverter 104
Closing 206 and bearing switch 208 alternately can be closed state and off-state during switch periods.For example, positive switch 206 and bearing
Switch 208 can be controlled by controller circuitry 102 using pulsewidth modulation (PWM) signal.For example, pwm signal can be inversion
Each branch 200,202,204 of device 104 defines switch periods.Switch periods define in inverter leg 200,202,204
Positive switch 206 closure and same inverter leg 200,202,204 in negative switch 208 disconnect period；Inverter branch
Positive switch 206 in road 200,202,204 disconnects, and the negative switch 208 in same inverter leg 200,202,204 is closed
Period；And switch 206,208 is alternately to disconnect and the frequency (or how soon) of closed state.The frequency can with by controlling
The frequency for the pwm signal that device circuit 102 generates is corresponding.
For example, in first time period, positive switch 206 can be closed for each branch 200,202,204, and in phase
Negative switch 208 in same branch 200,202,204 can disconnect, so that the positive part of AC voltage is transmitted to load.Not
In same second time period, the positive switch 206 in branch 200,202,204 can be disconnected, and in the branch 200,202,204
Negative switch 208 is closed, and the negative part of AC voltage is conducted to load 116.Each branch 200,202,204 of inverter 104
In positive switch 206 and negative switch 208 can by the switching frequency of pwm signal respectively alternately in disconnection and closed position, with
DC is promoted to be converted to AC.
It is connected to the switch of multiple inverters 104 of identical positive dc bus 112 and negative DC bus 114 (as shown in fig. 1)
The denominator (commonality) of frequency (based on the pwm signal generated by controller circuitry 102) improves capacitor 120
Received electric current.In addition, the denominator of the phase of multiple inverters 104 can be shown in Fig. 1 system 100 circuit 106 in
Ripple voltage or ripple current are generated, such as the U.S. Patent application of file number 313402, entitled " ripple current reduction system "
Described in, entire contents are incorporated herein by reference.
Fig. 3 shows switch periods R, Y, B of the inverter 104 according to public pwm signal.For each inverter
104 (" inverter 1 ", " inverter 2 ", " inverter 3 ", " inverter 4 ", " inverter 5 " and " inverters 6 " in Fig. 3), show
For switch periods R, Y, B of each branch 200,202,204 (as shown in Figure 2) of inverter 104.Switch periods R can
To indicate that the positive switch 206 of the first branch 200 of inverter 104 is closure and breaks with negative switch 208 alternating (as shown in Figure 2)
The ratio of open state, the positive switch 206 and negative switch 208 that switch periods Y can indicate the second branch 202 of inverter 104 are (such as
Shown in Fig. 2) replace the third branch that inverter 104 can be indicated for the ratio and switch periods B of open and close state
204 positive switch 206 and negative switch 208 alternating (as shown in Figure 2) are the ratio of open and close state.The switch of inverter
Period shows along the horizontal axis 300 for the time (millisecond) for indicating switch periods.As shown in Figure 3, the correspondence in each inverter 104
The switch periods of branch 200,202,204 are identical.This leads to opening for the identical branch 200,202,204 in different inverters 104
The pass period is changed with identical frequency.
Fig. 4 is the diagram 400 of the embodiment of the electric current 402 conducted by the capacitor 120 of system 100.Shown in Fig. 4
Electric current 402 is the horizontal axis 404 for the time (in seconds) that edge indicates electric current and indicates 402 size of electric current as unit of ampere
The longitudinal axis 406 shown in.The public frequency of PWM cause to be conducted through along common bus 112,114 capacitor 120, be shown
For the convergence electric current of electric current 402.For example, the public frequency of the pwm signal generated by controller circuitry 102 can be 540 hertz,
It is about 1080 hertz so as to cause the frequency by capacitor 120.
Fig. 5 is the diagram 500 of the amplitude spectrum of the electric current 502 conducted by the capacitor 120 of system 100 shown in Fig. 1.
Electric current shown in Fig. 5 is along the horizontal axis 504 for indicating power frequency (for example, as unit of hertz) and to indicate size of current
Shown in the longitudinal axis 506 of (for example, RMS value of the electric current as unit of ampere).Electric current 502 may include opening in inverter 104
Close the ripple current conducted in positive dc bus 112 and negative DC bus 114 during the frequency identical period.For example, when by controlling
When device circuit 102 processed is that the frequency for the pwm signal that inverter 104 generates is as shown in Figure 3, electric current shown in fig. 5 can produce.
In the example of hgure 5, the frequency of the pwm signal based on inverter 104 generates electric current.Since inverter 104 is with public affairs
Switching frequency operation altogether can generate additional peak value 510 in the electric current by capacitor 120.Peak value 510 can represent edge
The ripple current of positive dc bus 112 and the conduction of negative DC bus 114.Peak value 510 can appear in switching frequency along horizontal axis 504
At or near even-multiple (for example, 2 times of switching frequency, 4 times of switching frequency, 6 times etc. of switching frequency).Peak value 508 is shown
For the crest frequency that at 1080 hertz, this instruction passes through the electric current of capacitor 120.Peak value 508 can be based on inverter 104
The frequency of switch periods corresponding with PWM frequency.Total RMS of the peak value 508,510 of electric current 502 is more than 284 amperes, such as Fig. 5 institute
Show.Based on total RMS, the size and/or cost of capacitor 120 can be determined.
In order to reduce RMS current, controller circuitry 102 can be configured as respective to one or more inverters 104
Switch periods apply frequency displacement.The frequency displacement of switch periods between inverter reduces the RMS current by capacitor 120.
Fig. 6 is the diagram 600 of the embodiment of the frequency displacement electric current 602 conducted by the capacitor 120 of system 100.Show in Fig. 6
Electric current 602 out indicates electricity along the horizontal axis 604 for the time (for example, in seconds) for indicating electric current and as unit of ampere
The longitudinal axis 606 of the size of stream 602 is shown.Electric current 602 is based on controller circuitry 102 for each inverter 104 adjustment PWM frequency
Rate.For example, the PWM frequency of each inverter 104 can be adjusted predetermined amount by controller circuitry 102.Number based on inverter 104
Amount, quantity (for example, 3) of phase based on inverter 104 etc., predetermined amount can be the hertz number of setting (for example, 5 hertz, 10
Hertz, 15 hertz, at least 10 hertz etc.), percentage (for example, 2%, 3%, 5%, at least 2% etc.).For example, controller circuitry
102 can be configured as and generate different PWM frequencies, such as 525 hertz, 535 hertz, 545 hertz for each inverter 104
Hereby, 555 hertz, 565 hertz and 575 hertz.
Additionally or alternatively, controller circuitry 102, which can be adjusted only, is transmitted to such as two or more inverters 104
Inverter 104 part PWM frequency.For example, controller circuitry 102 at least the first inverter 104 will can be adjusted to have
540 hertz of frequency, and at least the second inverter 104 is adjusted to the frequency with 546 hertz.Optionally, frequency displacement it
Afterwards, at least two inverters 104 can have identical frequency.For example, three inverters 104 can have 540 hertz of frequency
Rate, and remaining inverter 104 can have 546 hertz of frequency.Optionally, between frequency difference can based on 3 multiple
The quantity of (for example, 6 hertz) and/or the phase based on inverter 104.For example, inverter 104 can based on three different phases,
The first frequency and second frequency of the switch periods of inverter 104 can be arranged in controller circuitry 102 based on 3 multiple.
Fig. 7 is the diagram 700 of the embodiment of the amplitude spectrum of the electric current 702 conducted by capacitor 120.Shown in Fig. 7
Electric current 702 is along the horizontal axis 704 for indicating power frequency (for example, as unit of hertz) and to indicate size of current (for example, with peace
Training be unit electric current root mean square (RMS) value) the longitudinal axis 706 shown in.Electric current 702 may include opening in inverter 104
The ripple current conducted in positive dc bus 112 and negative DC bus 114 during the period for closing frequency.Peak value 710,712 can be with
Indicate the ripple current conducted along positive dc bus 112 and negative DC bus 114.Peak value 710,712 can occur along horizontal axis 704
At or near the even-multiple (for example, 2 times of switching frequency, 4 times of switching frequency, 6 times etc. of switching frequency) of switching frequency.
Shown in as shown 700, electric current 702 does not include 508 frequency of peak value by the electric current of capacitor 120.However, control
Device circuit 102 corresponds to harmonic current frequency spectrum along the propagation of common bus 112,114 to the frequency displacement of PWM frequency.For example, showing
Close to 1080 hertz of multiple peak values 708, however, multiple peak values 708 are respectively in different frequency along horizontal axis 704.With Fig. 5 institute
The peak value 508 shown is compared, and multiple peak values 708 represent propagation of the harmonic current frequency spectrum at different frequency peak value.Multiple peak values 708
It can indicate the crest frequency of the inverter 104 based on frequency displacement.For example, multiple peak values 708 respectively can be with an inverter 104
It is corresponding.Based on by the received PWM frequency of inverter 104, multiple peak values 708 can be with 1050 hertz, l070 hertz, l090 hertz
Hereby, 1110 hertz, 1130 hertz and 1150 hertz of correspondences.
It is noted that the electric current 702 of multiple peak values 708 is lower relative to peak value 508 shown in fig. 5.For example, electric current
702 total RMS is about 177 amperes.Based on frequency displacement, the RMS of electric current 702 is lower relative to the RMS of electric current 502, this allows to reduce
The size and/or cost of capacitor 120.
Fig. 8 shows the flow chart for reducing the method 800 of electric current of inverter current system 100.For example, method 800 can
Using the structure or aspect of the various embodiments (for example, system and or method) being discussed herein.In various embodiments, may be used
To omit or increase certain steps (or operation), certain steps can be combined, may be performed simultaneously certain steps, can hold parallel
Certain steps can be divided into multiple steps, can be executed in different order certain steps or can be with by the certain steps of row
Certain steps or series of steps are re-executed in an iterative manner.In various embodiments, the part of method 800, aspect and/
Or modification can be used as one or more algorithms, to instruct hardware to execute one or more operations as described herein.It answers considerable
It is that, according to the embodiments herein, other methods can be used.
802, controller circuitry 102 can be configured as determination and be connected to common bus 112,114 and at least one electricity
The quantity of several inverters 104 of container 120.Several inverters 104 are configured as by making in several inverters
Different switches 206,208 be alternately disconnection and closed state in the correspondence switch periods of each inverter 104, public affairs will be passed through
The DC of bus 112,114 is converted to AC altogether.The quantity of inverter 104, which can store, is being operatively coupled to controller circuitry
In 102 memory (for example, tangible and non-transitory computer-readable medium, flash memory, RAM, ROM, EEPROM etc.).
Additionally or alternatively, controller circuitry 102 can determine system 100 based on the multiple pwm signals for being transmitted to inverter 104
Inverter 104 quantity.
804, controller circuitry 102 can be configured as the switch periods determined for one or more inverters 104
Frequency displacement.Frequency displacement can be determined based on the quantity of inverter 104.For example, controller circuitry 102 can be based on inverter 104
Quantity determine the quantity of frequency.As shown in Figure 1, the quantity of inverter can be determined as 6 by controller circuitry 102.Example
Such as, inverter 104 can be grouped into the part of the inverter 104 with equal amount by controller circuitry 102.Controller circuitry
102 can be divided to inverter 104 be two groups, and every group has different frequencies.In another example, controller circuitry 102 can be with
It is three groups that inverter 104, which is divided,.Three groups of respective pwm signal can be adjusted to the frequency for having different by controller circuitry 102
Rate.In another example, controller circuitry 102 can make each pwm signal have different frequencies.Pwm signal can indicate
The correspondence switch periods of inverter 104.
It is noted that distribute to 104 groups of inverter and/or inverter 104 different frequency can based on predetermined amount and
Variation.The predetermined amount can store in memory.The quantity of quantity based on inverter 104, the phase based on inverter 104
(for example, 3) etc., predetermined amount can be the hertz number (for example, 5 hertz, 10 hertz, 15 hertz, at least 10 hertz etc.) of setting, hundred
Divide than (for example, 2%, 3%, 5%, at least 2% etc.).
808, controller circuitry 102 can be configured as based on frequency displacement to reduce and be transmitted on common bus 112,114
RMS current.In conjunction with Fig. 7, frequency displacement can be corresponding along the propagation of common bus 112,114 with harmonic current frequency spectrum.For example, multiple
Peak value 708 can be based on the different frequency for the pwm signal for being transmitted to inverter 104 by controller circuitry 102.For example, each peak
Value 708 can be corresponding with one of the frequency of pwm signal at 104 place of inverter.Based on frequency displacement, reduce through capacitor 120
RMS current.
In conjunction with Fig. 5, the public frequency of pwm signal can be sent to each inverter 104 by controller circuitry 102.It is based on
Public frequency, the RMS current by capacitor 120 are about 284 amperes.
Pass through the RMS electricity of capacitor 120 in conjunction with Fig. 7 by adjusting the frequency of the pwm signal of at least two inverters 104
Stream reduces relative to RMS current shown in Fig. 5.
810, controller circuitry 102 can be configured as the RMS current that measurement passes through at least one capacitor 120.Example
Such as, controller circuitry 102 can in Fig. 1 122 at be conductively coupled to common bus 112,114.It optionally, 122 can be with
It is voltage and or current sensor.Additionally or alternatively, controller circuitry 102 may include that the modulus coupled at 122 turns
Parallel operation (ADC) and/or AFE(analog front end) measure the voltage and or current of common bus 112,114.Controller circuitry 102 can be with
It is configured as the measurement at 122 and passes through common bus 112,114, capacitor 120 electric current.Based on stored in memory
The electrical characteristics (for example, capacitor) of capacitor 120, controller circuitry 102 can determine the RMS current by capacitor 120.
812, controller circuitry 102 can be configured as whether determining RMS current is higher than threshold value.For example, threshold value can be with
The scheduled non-zero threshold being stored in memory.The threshold value can electrical characteristics and capacitor 120 based on capacitor 120
It is configured and/or specifies the ripple current handled within system 100.For example, capacitor 120 can be manufactured to processing system
The magnitude of current in 100.If electric current is more than the specified current flow of capacitor, capacitor 120 is likely to be broken and/or becomes to have scarce
It falls into.The threshold value can be the specified RMS current of capacitor 120 and/or the RMS current less than specified amount.
If RMS current is higher than threshold value, 814, controller circuitry 102 can be configured as adjustment frequency displacement.Controller
Circuit 102 can be configured as the inverter for having different PWM signal frequencies for the switch periods increase of inverter 104
104 quantity.In one embodiment, it is corresponding to can have 104 groups of the inverters different from two for controller circuitry 102
Two different PWM signal frequencies.Such as inverter 104 is grouped into pwm signal first frequency by controller circuitry 102
First group (for example, " inverter #1 " shown in FIG. 1, " inverter #2 ", " inverter #3 ") and have second frequency (for example, not
Be same as first frequency) second group (" inverter #4 " shown in FIG. 1, " inverter #5 " and " inverter #6).Based on RMS current
More than threshold value, controller circuitry 102 can divide inverter 104 for three different groups, and each group has different pwm signals
Frequency.Such as controller circuitry 102 divides inverter 104 for first group with pwm signal first frequency (for example, shown in Fig. 1
" inverter #1 and " inverter #2 "), second group with second frequency (for example, being different from first frequency) (for example, " inversion
Device #3 " and " inverter #4 "), and the third group (example with third frequency (for example, being different from first frequency and second frequency)
Such as, " inverter #5 " and " inverter #6 ").Additionally or alternatively, controller circuitry 102 can be to be transmitted to inverter 104
Each pwm signal distribute different frequencies.
In one embodiment, a kind of system (for example, inverter current system) is provided.The system comprises be connected to
Multiple inverters of common bus and at least one capacitor, the multiple inverter are configured as by making the multiple inversion
The different switches of device are alternately disconnection and closed state in the correspondence switch periods of each inverter, will be by public total
The DC current (DC) of line is converted to alternating current (AC).The system comprises controller circuitrys.The controller circuitry is matched
It is set to the electric current for adjusting and being transmitted to the inverter on the common bus, so that the root mean square of the electric current meets one or more
A specified value.The control circuit controls the inverter, with the correspondence switch periods to one or more inverters
Apply frequency displacement.
Optionally, the controller circuitry is configured as, by the correspondence for making two or more inverters
Switch periods are in the different frequency for the pulse width modulation for being expressed as being exported by the controller circuitry, to apply the frequency
It moves.
Optionally, the frequency displacement is corresponding along the propagation of the common bus with harmonic current frequency spectrum.
Optionally, the controller circuitry is configured as, by being operated described in first group of one or more with first frequency
The correspondence switch periods of inverter, and the one or more inverters of different second groups are operated with different second frequencies
Corresponding switch periods, to apply the frequency displacement.Difference on the frequency between the first frequency and the second frequency is 3 multiple.
Optionally, the controller circuitry is configured as opening by transmission first frequency and second frequency as the correspondence
The period is closed to apply the frequency displacement.Difference on the frequency between the first frequency and the second frequency is at least 10 hertz.
Optionally, the controller circuitry is configured as applying the frequency displacement, so that in the multiple inverter at least
The correspondence switch periods of first inverter and the second inverter are in public frequency.
Optionally, the controller circuitry is configured as applying the frequency displacement, so that the multiple inverter is respective right
The inductive switch period is in different frequency.
Optionally, the multiple inverter includes at least three inverters.
Optionally, the controller circuitry is configured as determining the frequency displacement based on the quantity of the multiple inverter.
In one embodiment, (for example, to reduce the electric current of inverter system) is provided a method.The method packet
Include the quantity for determining several inverters for being connected to common bus and at least one capacitor.Several inverters are configured as
By making the different switches of several inverters be alternately disconnected open and close in the correspondence switch periods of each inverter
Conjunction state will be converted to alternating current (AC) by the DC current (DC) of the common bus.The method includes determining needle
Frequency displacement to the switch periods of one or more inverters.The frequency displacement is determined based on the quantity of the inverter.
The method also includes being applied to one or more of inverters to the frequency displacement of the electric current conducted on the common bus
The switch periods, so that the root mean square of the electric current meets one or more specified values.
It optionally, include being in the switch periods of two or more inverters to indicate by applying the frequency displacement
For the different frequency of pulse width modulation.
Optionally, the frequency displacement is corresponding along the propagation of the common bus with harmonic current frequency spectrum.
Optionally, by the frequency displacement is applied to first group of inverter including first frequency the switch periods and
The switch periods of second group of inverter including second frequency.Frequency between the first frequency and the second frequency
Difference based on 3 multiple.
Optionally, the frequency displacement is applied as the corresponding switch periods by transmission first frequency and second frequency,
Wherein, the difference on the frequency between the first frequency and the second frequency is at least 10 hertz.
It optionally, include: at least in the multiple inverter by the way that the frequency displacement is applied to the switch periods
The correspondence switch periods of one inverter and the second inverter are in public frequency.
Optionally, by the way that frequency displacement is applied to one or more respective switch periods of inverter, make to inductive switch
Period is in different frequency.
Optionally, the multiple inverter includes at least three inverters.
In one embodiment, a kind of system (for example, inverter system) is provided.It is public the system comprises being connected to
Multiple inverters of bus and at least one capacitor.The multiple inverter is configured as by making the multiple inverter
Multiple switch is alternately disconnection and closed state in the correspondence switch periods of each inverter, will pass through common bus
DC current (DC) is converted to alternating current (AC).The system comprises controller circuitrys.The controller circuitry is configured as
Adjustment is transmitted to the electric current of the inverter on the common bus, so that the root mean square of the electric current meets one or more
Specified value.The controller circuitry controls the inverter so that frequency displacement to be applied to described in one or more inverters
Corresponding switch periods.The controller circuitry is configured as by making the described to inductive switch of two or more inverters
Period is in the different frequency for the pulse width modulation for being represented as being exported by the controller circuitry to apply the frequency displacement.
Optionally, the controller circuitry is configured as described two or more by being operated with first frequency and second frequency
Multiple inverters apply the frequency displacement.Difference on the frequency between the first frequency and the second frequency based on 3 multiple.
Optionally, the controller circuitry is configured as described two or more by being operated with first frequency and second frequency
Multiple inverters apply the frequency displacement.Difference on the frequency between the first frequency and the second frequency is at least 10 hertz.
When read in conjunction with the accompanying drawings, it is better understood with the foregoing description of the specific embodiment of present subject matter.In attached drawing
In the degree for showing the functional block of various embodiments, functional block is not necessarily indicative to the division between hardware circuit.Thus, for example,
One or more functions block (for example, processor or memory) can be in single hardware (for example, general purpose signal processor, micro-control
Device processed, random access memory, hard disk etc.) in realize.Similarly, program can be stand-alone program, can be used as subroutine simultaneously
Enter in operating system, can be the function installed in software package etc..Various embodiments be not limited to it is shown in the drawings arrangement and
Means.
Above description is illustrative and be not restrictive.(and/or its aspect) can group each other for example, above-described embodiment
It closes and uses.In addition, without departing from the present invention, many modify so that specific condition or material adapt to can be made
The introduction of present subject matter.While characterized as material size and type be intended to limit the parameter of present subject matter, still
They are by no means limitative, but exemplary embodiment.After looking back above description, other embodiments are for this field
Those of ordinary skill may be obvious.Therefore, appended claims be should refer to and these claims are enjoyed
The full scope of equivalent determine the range of present subject matter.
In the following claims, term " includes " and " wherein " are used as the equivalent thereof of the writings in the vernacular of corresponding term.This
Outside, in following following claims, term " first ", " second " and " third " etc. are used only as label, and are not intended to its object
Apply serial number requirement.In addition, the limitation of following claims is write with the format of " function limitations ", also quilt unintentionally
It is explained based on United States patent law 35U.S.C. § 112 (f), unless and until " device being used for ... " is used in statement
Phrase and rear attached function are stated and such claim without further structure limits.Also, as it is used herein, with odd number
Form describes and is interpreted as being not excluded for multiple elements or step with the element of "a" or "an" beginning or step, removes
Non-clearly indicate this exclusion.It is interpreted to arrange in addition, being not intended to the reference of " one embodiment " of present subject matter
Except the presence for the additional embodiment for also including the feature.Moreover, unless expressly stated to the contrary, otherwise "include", "comprise"
Or it may include without as other of the characteristic that " having ", which has the embodiment of one or more elements of specific feature,
Element.
This specification uses examples to disclose several embodiments of present subject matter, and also makes ordinary skill people
Member can practice the embodiment of present subject matter, including manufacturing and using any equipment or system and executing the side of any combination
Method.Present subject matter can patentable scope be defined by the claims, and may include ordinary skill people
Other examples that member expects.If other such examples have the nondistinctive structural element of literal language with claim,
Or if they include not having the equivalent structure element of substantial differences with the literal language of claim, they are intended to fall
Enter the scope of the claims.
Claims (20)
1. a kind of system, comprising:
Multiple inverters of common bus He at least one capacitor are connected to, the multiple inverter is configured as by described
The different switches of multiple inverters are alternately disconnection and closed state in the correspondence switch periods of each inverter, will be led to
The DC current DC for crossing common bus is converted to alternating current AC；
Controller circuitry is configured as by controlling the multiple inverter so that frequency displacement is applied to one or more inversions
The corresponding switch periods of device, to adjust the electric current for being transmitted to the inverter on the common bus, so that described
The root mean square of electric current meets one or more specified values.
2. the system as claimed in claim 1, wherein the controller circuitry is configured as:
It is represented as by being in the corresponding switch periods of two or more inverters by the controller electricity
The different frequency of the pulse width modulation of road output applies the frequency displacement.
3. the system as claimed in claim 1, wherein the frequency displacement is with harmonic current frequency spectrum along the propagation of the common bus
It is corresponding.
4. the system as claimed in claim 1, wherein the controller circuitry is configured as:
By operating the correspondence switch periods of first group of one or more inverter with first frequency, and with different second
Frequency operates the correspondence switch periods of the one or more inverters of different second groups to apply the frequency displacement, and
Difference on the frequency between the first frequency and the second frequency is 3 multiple.
5. the system as claimed in claim 1, wherein the controller circuitry is configured as:
Apply the frequency displacement as the corresponding switch periods by output first frequency and second frequency, wherein described the
Difference on the frequency between one frequency and the second frequency is at least 10 hertz.
6. the system as claimed in claim 1, wherein the controller circuitry is configured as:
Apply the frequency displacement, so that at least the first inverter and the second inverter in the multiple inverter is all to inductive switch
Phase is in public frequency.
7. the system as claimed in claim 1, wherein the controller circuitry is configured as:
Apply the frequency displacement, so that the correspondence switch periods of the multiple inverter are in different frequency.
8. the system as claimed in claim 1, wherein the multiple inverter includes at least three inverters.
9. the system as claimed in claim 1, wherein the controller circuitry is configured as the number based on the multiple inverter
Amount is to determine the frequency displacement.
10. a kind of method, comprising:
Determine the quantity for being connected to the inverter of common bus and at least one capacitor, the inverter is configured as by making
The different switches of the multiple inverter are alternately disconnection and closed state in the correspondence switch periods of each inverter,
Alternating current AC will be converted to by the DC current DC of the common bus；
The frequency displacement for determining the switch periods for one or more inverters is determined based on the quantity of the inverter
The frequency displacement；And
The frequency displacement of the electric current conducted on the common bus will be applied to described in one or more inverters
Switch periods, so that the root mean square of the electric current meets one or more specified values.
11. method as claimed in claim 10, wherein applying the frequency displacement includes:
The switch periods of two or more inverters are made to be in the different frequency for being represented as pulsewidth modulation.
12. method as claimed in claim 10, wherein the frequency displacement is with harmonic current frequency spectrum along the propagation of the common bus
It is corresponding.
13. method as claimed in claim 10, wherein
The frequency displacement is applied to the switch periods of first group of inverter including first frequency and including second frequency
The switch periods of second group of inverter, difference on the frequency between the first frequency and the second frequency based on 3 multiple,
Applying the frequency displacement includes operating first group of inverter with the first frequency and operating institute with the second frequency
State at least one of second group of inverter.
14. method as claimed in claim 10, wherein
The frequency displacement is applied to the switch periods of first group of inverter including first frequency and including second frequency
The switch periods of second group of inverter,
Difference on the frequency between the first frequency and the second frequency is at least 10 hertz,
Applying the frequency displacement includes operating first group of inverter with the first frequency and operating institute with the second frequency
State at least one of second group of inverter.
15. method as claimed in claim 10, wherein
It includes: that at least the first inverter in the multiple inverter and second are inverse that the frequency displacement, which is applied to the switch periods,
The correspondence switch periods for becoming device are in public frequency,
The public frequency conducts along the common bus and passes through at least one described capacitor.
16. method as claimed in claim 10, wherein
By the way that the frequency displacement is applied to the respective switch periods of one or more of inverters, make one or more of inverse
Become the respective corresponding switch periods of device and is in different frequency.
17. method as claimed in claim 10, wherein the multiple inverter includes at least three inverters.
18. a kind of system, comprising:
Multiple inverters of common bus He at least one capacitor are connected to, the multiple inverter is configured as by making
The different switches for stating multiple inverters are alternately disconnection and closed state in the correspondence switch periods of each inverter, are come
Alternating current AC will be converted to by the DC current DC of common bus；And
Controller circuitry is configured as by controlling the inverter so that frequency displacement is applied to one or more inverters
The corresponding switch periods, adjustment is transmitted to the electric current of the inverter on the common bus, so that the electric current is equal
Root meets one or more specified values, wherein the controller circuitry is configured as by making described in two or more
The corresponding switch periods of inverter are in the difference for the pulse width modulation for being represented as being exported by the controller circuitry
Frequency applies the frequency displacement.
19. system as claimed in claim 18, wherein
The controller circuitry is configured as, by operating the two or more inverters with first frequency and second frequency
Apply the frequency displacement,
Difference on the frequency between the first frequency and the second frequency is 3 multiple,
Applying the frequency displacement includes operating the first inverter with the first frequency and operating the second inversion with the second frequency
At least one of device.
20. system as claimed in claim 18, wherein
The controller circuitry is configured as, by operating the two or more inverters with first frequency and second frequency
Apply the frequency displacement,
Difference on the frequency between the first frequency and the second frequency is at least 10 hertz,
Applying the frequency displacement includes operating the first inverter with the first frequency and operating the second inversion with the second frequency
At least one of device.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US201762484773P | 2017-04-12 | 2017-04-12 | |
| US62/484,773 | 2017-04-12 | ||
| US15/921,299 | 2018-03-14 | ||
| US15/921,299 US10291147B2 (en) | 2016-09-29 | 2018-03-14 | Current reduction system for inverters connected to a common bus |
| PCT/US2018/026399 WO2018191108A1 (en) | 2017-04-12 | 2018-04-06 | Current reduction system for inverters connected to a common bus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110506387A true CN110506387A (en) | 2019-11-26 |
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| CN201880024984.3A Pending CN110506387A (en) | 2017-04-12 | 2018-04-06 | Electric current for being connected to the inverter of common bus reduces system |
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|---|---|
| CN (1) | CN110506387A (en) |
| AU (2) | AU2018253038B2 (en) |
| DE (1) | DE112018002013T5 (en) |
| WO (1) | WO2018191108A1 (en) |
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| WO2021109583A1 (en) * | 2019-12-04 | 2021-06-10 | 中国电力科学研究院有限公司 | V-f cross control-based method and system for regulating photovoltaic inverter |
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| JP7260602B2 (en) * | 2020-09-24 | 2023-04-18 | トランスポーテーション アイピー ホールディングス，エルエルシー | Harmonic distortion reduction system for converters connected to a common bus |
| DE102021113964A1 (en) | 2021-05-31 | 2022-12-01 | Bayerische Motoren Werke Aktiengesellschaft | Method for determining at least one current supplied to an electric machine by means of a feedback signal, drive system and motor vehicle |
| DE102021129718A1 (en) * | 2021-11-15 | 2023-05-17 | Still Gesellschaft Mit Beschränkter Haftung | converter |
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| AU2018253038A1 (en) | 2019-10-31 |
| DE112018002013T5 (en) | 2020-01-16 |
| AU2020273311B2 (en) | 2021-12-09 |
| WO2018191108A1 (en) | 2018-10-18 |
| AU2020273311A1 (en) | 2020-12-17 |
| AU2018253038B2 (en) | 2020-09-03 |
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