CN105431792A - Multi-machine frequency converter - Google Patents
Multi-machine frequency converter Download PDFInfo
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- CN105431792A CN105431792A CN201480019864.6A CN201480019864A CN105431792A CN 105431792 A CN105431792 A CN 105431792A CN 201480019864 A CN201480019864 A CN 201480019864A CN 105431792 A CN105431792 A CN 105431792A
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- 238000004891 communication Methods 0.000 claims abstract description 290
- 239000013307 optical fiber Substances 0.000 claims description 12
- 238000000034 method Methods 0.000 description 21
- 230000001360 synchronised effect Effects 0.000 description 20
- 238000010586 diagram Methods 0.000 description 17
- 238000010977 unit operation Methods 0.000 description 14
- 230000005540 biological transmission Effects 0.000 description 13
- 238000012937 correction Methods 0.000 description 12
- 230000008569 process Effects 0.000 description 9
- 230000006870 function Effects 0.000 description 8
- 230000005012 migration Effects 0.000 description 8
- 238000013508 migration Methods 0.000 description 8
- 230000008054 signal transmission Effects 0.000 description 7
- 230000007547 defect Effects 0.000 description 6
- 238000009434 installation Methods 0.000 description 5
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- 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
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/418—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM]
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/418—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM]
- G05B19/41845—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM] characterised by system universality, reconfigurability, modularity
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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
- 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
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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
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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Quality & Reliability (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Inverter Devices (AREA)
Abstract
Provided is a multi-machine frequency converter, which may comprise: a master control unit, and N1 execution units coupled in series by means of a communications port, said N1 execution unit sharing a common DC bus; the first communications port of the master control unit is connected to the second communications port of the first of the N1 execution units; the N1 execution units comprise N11 rectifier units and N12 inverter units; N11 is a positive integer, and N12 is a positive integer greater than 1; said first execution unit is an execution unit located at an edge position of said N1 execution units connected in series by means of a communications port. The technical solution provided by the embodiments of the present invention is conducive to reducing the complexity of frequency converter wiring configurations in the context of multiple machines, improving the stability and reliability in multi-machine operation of frequency converters.
Description
Technical field
The present invention relates generally to electric and electronic technical field, is specifically related to multimachine frequency converter.
Background technology
Current, on market, most of frequency converter is unit frequency converter, and what unit frequency converter all adopted is that a control module directly controls an inversion unit, and control module does not generally control rectification unit, and concrete structure can as shown in Fig. 1-a.
When unit frequency converter will do parallel operation synchronous operation (i.e. after the output-parallel of identical or corresponding or at least two unit frequency converters of the speed/torque of the load motor of at least two unit frequency converters bringing onto load motor or asynchronous to realize factory grand), at least two unit frequency converter composition frequency converter multi-computer systems, based on RS485 bus communication mode between each frequency converter.The structure of 485 bus communication modes is as shown in Fig. 1-b, and system cloud gray model frequency is sent to each frequency converter by 485 buses by control desk, and state feedback information is sent to control desk by bus by each frequency converter.In addition, the system start/stop machine signal that provides of control desk and primary transducer send to from the dtc signal of frequency converter is all connected by independent signal wire to realize.The mode that this multiple frequency converter is connected to realize parallel operation synchronous operation apply at the scene in Problems existing be that to realize the cost of parallel operation synchronous operation high, various control line wiring is complicated, and universal serial bus wiring is long.
In research and practice process, inventor finds, some defects that existing frequency convertor system exists when two-shipper or the application of multimachine master & slave control: the communication of 485 bus modes exists communication mode itself between host and slave processors, and to there is anti-interference weak, the shortcoming of stable signal transmission difference.Due to the restriction of communication mode, be difficult to the Signal transmissions carrying out overlength distance.And master slave system control structure is complicated, multiple signals line works simultaneously, installs complex operation.
Summary of the invention
The embodiment of the present invention provides a kind of multimachine frequency converter, to simplifying the complicacy of the wire structures under frequency converter multimachine scene, improves the reliability of frequency converter multiple unit operation.
Embodiment of the present invention first aspect provides a kind of multimachine frequency converter, can comprise:
Main control unit, N1 the performance element of being connected by communication port, wherein, described N1 performance element common DC bus;
Wherein, first communication port of described main control unit is connected with the second communication port of the first performance element in a described N1 performance element, wherein, a described N1 performance element comprises N11 rectification unit and N12 inversion unit altogether, described N11 is positive integer, described N12 be greater than 1 positive integer, described first performance element is the performance element being in one end marginal position among described N1 the performance element of being connected by communication port.
Optionally, the second communication port of described main control unit is connected with the first communication port of the second performance element in a described N1 performance element, wherein, described second performance element is the performance element being in other end marginal position in described N1 the performance element of being connected by communication port.
Optionally, described multimachine frequency converter also comprises N2 the performance element of being connected by communication port, and a described N2 performance element is described DC bus altogether;
The second communication port of described main control unit is connected with the first communication port of the 3rd performance element in described N2 the performance element of being connected by communication port, wherein, described N2 is positive integer, a described N2 performance element comprises rectification unit and/or inversion unit, wherein, described 3rd performance element is the performance element being in one end marginal position in described N2 the performance element of being connected by communication port.
Optionally, described first performance element is inversion unit, first communication port of described first performance element is connected with the second communication port of the 4th performance element in a described N1 performance element, and wherein, described 4th performance element is rectification unit or inversion unit;
Or described first performance element is rectification unit, the first communication port of described first performance element is connected with the second communication port of the 5th performance element in a described N1 performance element, and wherein, described 5th performance element is rectification unit or inversion unit.
Optionally, described communication port is optical fiber communication port or ethernet communication port or level signal communication port or Differencing communication interface.
Embodiment of the present invention second aspect provides a kind of multimachine frequency converter, can comprise:
Main control unit, N3 the performance element of being connected by communication port and N4 the performance element of being connected by communication port;
Wherein, a described N3 performance element and described N4 performance element common DC bus;
Wherein, first communication port of described main control unit is connected with the second communication port of the 6th performance element in described N3 the performance element of being connected by communication port, and the second communication port of described main control unit is connected with the first communication port of the 7th performance element in described N4 the performance element of being connected by communication port;
Wherein, X1 rectification unit and X2 inversion unit is comprised altogether in a described N3 performance element and a described N4 performance element, wherein, described X1 is positive integer, described X2 be greater than 1 positive integer, described 6th performance element is the performance element being in one end marginal position in described N3 the performance element of being connected by communication port, and described 7th performance element is the performance element being in one end marginal position in described N4 the performance element of being connected by communication port.
Optionally, described 6th performance element is rectification unit, and the second communication port that the first communication port of described 6th performance element is connected with the 9th performance element in a described N3 performance element connects, and described 9th performance element is rectification unit or inversion unit;
Optionally, described 6th performance element is inversion unit, first communication port of described 6th performance element is connected with the second communication port of the 8th performance element in a described N3 performance element, and wherein, described 8th performance element is rectification unit or inversion unit.
Optionally, described communication port is optical fiber communication port or ethernet communication port or level signal communication port or Differencing communication interface.
The embodiment of the present invention third aspect provides a kind of multimachine frequency converter, can comprise:
Main control unit, a N5 rectification unit, N6 the inversion unit of being connected by communication port,
Wherein, a described N5 rectification unit and described N6 inversion unit common DC bus;
Wherein, first communication port of described main control unit is connected with the second communication port of the first inversion unit in a described N6 inversion unit, described N5 is positive integer, described N6 be greater than 1 positive integer, described first inversion unit is the inversion unit being in one end marginal position among described N6 the inversion unit of being connected by communication port.
Optionally, the second communication port of described main control unit is connected with the first communication port of the second inversion unit in a described N6 inversion unit, wherein, described second inversion unit is the inversion unit being in other end marginal position in described N6 the inversion unit of being connected by communication port.
Optionally, described communication port is optical fiber communication port or ethernet communication port or level signal communication port or Differencing communication interface.
Embodiment of the present invention fourth aspect provides a kind of multimachine frequency converter, can comprise:
Main control unit, a N9 rectification unit, N7 the inversion unit of being connected by communication port and N8 the inversion unit of being connected by communication port; Wherein, a described N9 rectification unit, a described N7 inversion unit and described N8 inversion unit common DC bus;
Wherein, first communication port of described main control unit is connected with the second communication port of the first inversion unit in described N7 the inversion unit of being connected by communication port, and the second communication port of described main control unit is connected with the first communication port of the second inversion unit in described N8 the inversion unit of being connected by communication port;
Wherein, described N7 and described N8 is positive integer, described first inversion unit is the inversion unit being in one end marginal position in described N7 the inversion unit of being connected by communication port, wherein, described second inversion unit is the inversion unit being in one end marginal position in described N8 the inversion unit of being connected by communication port.
Optionally, described communication port is optical fiber communication port or ethernet communication port or level signal communication port or Differencing communication interface.
Can find out, in some embodiments of the invention, multimachine frequency converter comprises main control unit and multiple performance element, compared with existing frequency converter multi-computer system, is conducive to effectively reducing parallel operation cost.485 bus communication modes in conventional inverter device multi-computer system are replaced with the communication mode of serial between the main control unit and multiple performance element of frequency converter, and then be conducive to eliminating the defect that signal transmission anti-interference is poor, transmission range is short, the super teletransmission being conducive to realizing antijamming capability strong is defeated, and then is conducive to the reliability improving frequency converter multiple unit operation scene.Interconnect architecture between main control unit and performance element is relatively simple, and installation wiring is relatively simple, visible, and this structure of the embodiment of the present invention is conducive to the wire structures complicacy simplifying frequency converter multimachine scene.Further, owing to being connected by communication port between performance element, being conducive to the extendability improving frequency converter multiple unit operation like this, multiple performance element can being connected to meet corresponding demand according to different scene by communication port.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments of the invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to the accompanying drawing provided.
Fig. 1-a is the schematic diagram of a kind of unit frequency converter that prior art provides;
Fig. 1-b is the parallel operation schematic diagram of a kind of multiple unit frequency converters that prior art provides;
Fig. 2-a is the schematic diagram of a kind of multimachine frequency converter that the embodiment of the present invention provides;
Fig. 2-b is the schematic diagram of the another kind of multimachine frequency converter that the embodiment of the present invention provides;
Fig. 2-c is the schematic diagram of the another kind of multimachine frequency converter that the embodiment of the present invention provides;
Fig. 2-d is the schematic diagram of the another kind of multimachine frequency converter that the embodiment of the present invention provides;
Fig. 2-e is the schematic diagram of the another kind of multimachine frequency converter that the embodiment of the present invention provides;
Fig. 2-f is the schematic diagram of the another kind of multimachine frequency converter that the embodiment of the present invention provides;
Fig. 2-g is the schematic diagram of the another kind of multimachine frequency converter that the embodiment of the present invention provides;
Fig. 3-a is the schematic diagram of the another kind of multimachine frequency converter that the embodiment of the present invention provides;
Fig. 3-b is the schematic diagram of the another kind of multimachine frequency converter that the embodiment of the present invention provides;
Fig. 3-c is the schematic diagram of the another kind of multimachine frequency converter that the embodiment of the present invention provides;
Fig. 3-d is the schematic diagram of the another kind of multimachine frequency converter that the embodiment of the present invention provides;
Fig. 3-e is the schematic diagram of the another kind of multimachine frequency converter that the embodiment of the present invention provides;
Fig. 4-a is the schematic diagram of the another kind of multimachine frequency converter that the embodiment of the present invention provides;
Fig. 4-b is the schematic diagram of the another kind of multimachine frequency converter that the embodiment of the present invention provides;
Fig. 5 is the schematic diagram of the another kind of multimachine frequency converter that the embodiment of the present invention provides.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
The embodiment of the present invention provides a kind of multimachine frequency converter, to simplifying the complicacy of the wire structures under frequency converter multimachine scene, improves the reliability of frequency converter multiple unit operation.
For making goal of the invention of the present invention, feature, advantage can be more obvious and understandable, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, the embodiments described below are only the present invention's part embodiments, and the embodiment of not all.Based on the embodiment in the present invention, those of ordinary skill in the art, not making other embodiments all obtained under creative work prerequisite, belong to the scope of protection of the invention.
Term " first ", " second ", " the 3rd " " 4th " etc. in instructions of the present invention and claims and above-mentioned accompanying drawing are for distinguishing different objects, instead of for describing particular order.In addition, term " comprises " and " having " and their any distortion, and intention is to cover not exclusive comprising.Such as contain the process of series of steps or unit, method, system, product or equipment and be not defined in the step or unit listed, but also comprise the step or unit do not listed alternatively, or also comprise alternatively for other intrinsic step of these processes, method, product or equipment or unit.
First illustrate, the multimachine frequency converter that the embodiment of the present invention provides comprises: main control unit, at least one rectification unit and at least two inversion units, wherein, in multimachine frequency converter, part or all of rectification unit can be can by the controlled rectification unit of master control unit controls, or also can be not by the uncontrollable rectification unit of master control unit controls, below in conjunction with accompanying drawing, dependency structure is illustrated.
First refer to Fig. 2-a, Fig. 2-a is the structural representation of a kind of multimachine frequency converter that one embodiment of the present of invention provide.Wherein, as shown in Fig. 2-a, a kind of multimachine frequency converter that one embodiment of the invention provides can comprise:
Main control unit 201, N1 the performance element 202 of being connected by communication port, above-mentioned N1 performance element common DC bus 210.
Wherein, the first communication port P1 of main control unit 201 is connected with the second communication port P0 of the first performance element among an above-mentioned N1 performance element 202.Wherein, first performance element is be in the performance element of one end marginal position (wherein among above-mentioned N1 the performance element of being connected by communication port, Fig. 2-a illustrates in framework, one end marginal position of N1 performance element after series connection is first performance element of residue second communication port P0, and other end marginal position is second performance element of residue first communication port P1).
Above-mentioned performance element 202 is rectification unit or inversion unit, and wherein, N1 performance element 202 comprises N11 rectification unit and N12 inversion unit altogether, and above-mentioned N11 is positive integer, above-mentioned N12 be greater than 1 positive integer.
Wherein, include two communication port (communication port P0 and communication port P1) in Fig. 2-a with each performance element 202, certainly, the function of two communication port can be identical or close, and under some scenes, these two communication port can be exchanged.The communication port P0 of each performance element mediated in N1 performance element 202 after series connection is connected other performance element 202 respectively with communication port P1, to realize the series connection of N1 performance element 202.
Wherein, main control unit 201 can send command word, data word (such as comprising level angle and the voltage modulated data word than isopulse width modulated (PWM, PulseWidthModulation) ripple critical data) and/or status word etc. by the first communication port P1.First performance element then receives from the command word of main control unit 201, data word and/or status word etc. by its second communication port P0, first performance element then forwards by its first communication port P1 the command word from main control unit 201, data word and/or the status word etc. that (for can the data of transparent transmission can directly forward, then can forward after processing for the data that need process) receive.Other performance element in an above-mentioned N1 performance element 202 also receives command word, data word and/or status word etc. by communication interface.
It should be noted that, " forwarding " in various embodiments of the present invention, may be the data received are not made an amendment and directly forwards, also may be the data received are carried out corresponding repairing after forward, such as can the content of transparent transmission in the command word received, data word and/or status word, then can not make an amendment and directly forward, and for can not the content of transparent transmission in the command word received, data word and/or status word, then can forward after it is modified.
Wherein, N1 performance element 202 can produce synchronizing signal according to information such as the reference clock of main control unit transmission and time offsets; Also can carry out corresponding operation according to from the command word of main control unit 201, data word (such as comprising the data word of the PWM ripple critical data such as level angle and voltage modulated ratio) and/or status word etc.Such as, N1 performance element 202 can enter the state such as electrifying startup or dormancy according to from main control unit 201 command word.Again such as, N1 performance element 202 according to the data word comprising the PWM ripple critical data such as level angle and voltage modulated ratio from main control unit 201, can produce synchronous pulse width modulation wave; Utilize the pulse width ripple drive motor work produced.
Can finding out, the invention provides a kind of multimachine frequency converter, the synchronous and/or unsynchronized revolution of parallel operation can be realized, realizing with adopting multiple frequency converter in prior art compared with the method for parallel function, significantly reducing and realizing cost; Replace 485 bus communication modes in conventional inverter device multi-computer system with the communication mode of serial (as switching Ethernet communication modes) between the main control unit and multiple performance element of frequency converter, and then be conducive to eliminating the defect that signal transmission anti-interference is poor, transmission range is short, the super teletransmission being conducive to realizing antijamming capability strong is defeated, and then is conducive to the reliability improving frequency converter multiple unit operation scene.Interconnect architecture between main control unit and performance element is relatively simple, and installation wiring is relatively simple, visible, and this structure is conducive to the wire structures complicacy simplifying frequency converter multimachine scene.And owing to being connected by communication port between performance element, being conducive to the extendability improving frequency converter multiple unit operation like this, multiple performance element can being connected to meet corresponding demand according to different scene by communication port.
On the basis of Fig. 2-a, main control unit 201 also comprises second communication port P0, and main control unit 201 can send command word, data word and/or status word etc. by second communication port P0.
In some embodiments of the invention, as shown in Fig. 2-b, the second communication port P0 of main control unit 201 also can be connected with the first communication port P1 of the second performance element in an above-mentioned N1 performance element 202 thus form communications loop project organization, main control unit 201 can send command word by second communication port P0 and/or the first communication port P1 to each performance element 202, data word and/or status word etc., be equivalent to the communication port providing two transmission of informations, introducing communications loop can make the communication port between each unit have redundant backup function, fault-resistant and fault-tolerant ability are enhanced, be conducive to the reliability that further elevator system is run.
In other embodiments of the present invention, as shown in fig. 2-c, above-mentioned multimachine frequency converter also can comprise N2 the performance element 203 of being connected by communication port, wherein, and an above-mentioned N2 performance element 203 common DC bus 210.
Wherein, the second communication port P0 of above-mentioned main control unit 201 is connected with the first communication port P1 of the 3rd performance element among above-mentioned N2 the performance element 203 of being connected by communication port, wherein, above-mentioned N2 is positive integer, an above-mentioned N2 performance element comprises rectification unit and/or inversion unit, wherein, the 3rd performance element is the performance element being in one end marginal position in above-mentioned N2 the performance element 203 of being connected by communication port.
Wherein, Fig. 2-c citing illustrates that above-mentioned main control unit 201 comprises two communication port, these two communication port are all connected with the communication port of performance element, be, do not form communications loop between main control unit 201 and performance element with the key distinction of framework shown in Fig. 2-b.Certainly, main control unit 201 also can comprise more communication port, and each communication port of main control unit 201 all can be connected with the communication port of performance element according to mode shown in Fig. 2-c.
As shown in Fig. 2-d and Fig. 2-e, in some embodiments of the invention, above-mentioned first performance element can be inversion unit, and the first communication port P1 of above-mentioned first performance element can be connected with the second communication port P0 of the 4th performance element among an above-mentioned N1 performance element, wherein, above-mentioned 4th performance element is rectification unit or inversion unit.
Such as shown in Fig. 2-f and Fig. 2-g, in some embodiments of the invention, above-mentioned first performance element can be rectification unit, first communication port P1 of above-mentioned first performance element is connected with the second communication port P0 of the 5th performance element in an above-mentioned N1 performance element, wherein, above-mentioned 5th performance element is rectification unit or inversion unit.
Be appreciated that, such as Fig. 2-d, Fig. 2-e, Fig. 2-f and Fig. 2-g citing illustrate, in N1 the performance element of being connected by communication port, rectification unit and inversion unit can interlacedly arrange, and certain rectification unit and inversion unit also can not interlaced arrangements.
In some embodiments of the invention, the communication port of performance element and control module can be the communication port of optical fiber communication port or ethernet communication port or level signal communication port or Differencing communication interface or other type.
Main for framework shown in Fig. 2-a below, some modes producing synchronizing signal are introduced in multimachine frequency converter in citing.The mode producing synchronizing signal in multimachine frequency converter under other framework can be analogized.
In some embodiments of the invention, described main control unit 201 for, periodically send the first system reference clock signal produced by the first system reference clock; Calculate the time bias value corresponding with each inversion unit in a described N12 inversion unit, and send described time bias value corresponding with it to each inversion unit in a described N12 inversion unit.
Wherein, each inversion unit in a described N12 inversion unit, for after receiving described time bias value corresponding with it, the described time bias value received is utilized to carry out time migration compensation to local clock, the described the first system reference clock signal sent by the described main control unit 201 be currently received based on phaselocked loop and the described local clock carried out after time migration compensation carry out step locking, and the clock signal produced based on described local clock generates the synchronizing signal of the pulse width modulation wave produced for this inversion unit of synchronous correction.
In other embodiments of the present invention, some possibility modes that the operation that multimachine frequency converter is introduced in citing controls.Main control unit 201 is for sending pulse width modulation wave critical data corresponding with it to each inversion unit in a described N12 inversion unit.Wherein, each inversion unit among a described N12 inversion unit is for generating synchronizing signal; Pulse width modulation wave is produced based on the pulse width modulation wave critical data from described main control unit 201 received, the described pulse width modulation wave utilizing described synchronizing signal synchronous correction to produce, utilizes the described pulse width modulation wave drive motor work after synchronous correction.
Refer to Fig. 3-a, Fig. 3-a is the structural representation of the another kind of multimachine frequency converter that another embodiment of the present invention provides.Wherein, as shown in Fig. 3-a, the another kind of multimachine frequency converter that another embodiment of the present invention provides can comprise:
Main control unit 301, N3 the performance element 302 of being connected by communication port and N4 the performance element 303 of being connected by communication port.
Wherein, an above-mentioned N3 performance element and above-mentioned N4 performance element common DC bus 310.
Wherein, first communication port P1 of above-mentioned main control unit 301 is connected with the second communication port P0 of the 6th performance element in above-mentioned N3 the performance element of being connected by communication port, and the second communication port P0 of above-mentioned main control unit is connected with the first communication port P1 of the 7th performance element in above-mentioned N4 the performance element of being connected by communication port.
Wherein, X1 rectification unit and X2 inversion unit is comprised altogether in an above-mentioned N3 performance element and an above-mentioned N4 performance element, wherein, above-mentioned X1 is positive integer, above-mentioned X2 be greater than 1 positive integer, above-mentioned 6th performance element is the performance element being in one end marginal position in above-mentioned N3 the performance element of being connected by communication port, and wherein, the 7th performance element is the performance element being in one end marginal position in above-mentioned N4 the performance element of being connected by communication port.Wherein, above-mentioned N3 and N4 is positive integer, and above-mentioned N3 and N4 sum is more than or equal to 3.
Wherein, compared with framework shown in Fig. 2-a illustrated in previous embodiment, in framework shown in the present embodiment Fig. 3-a, above-mentioned N3 the performance element and the above-mentioned N4 performance element that are arranged in main control unit 301 both sides comprise X1 rectification unit and X2 inversion unit altogether, that is, at least 1 inversion unit can be disposed respectively in main control unit 301 both sides, and in framework shown in Fig. 2-a, the wherein side of main control unit 301 just deploys at least two inversion units and at least one rectification unit (N1 performance element 202 comprises N11 rectification unit and N12 inversion unit altogether).
Wherein, main control unit 301 can send command word, data word and/or status word etc. to N3 performance element 302 and N4 performance element 303 respectively by the first communication port P1 and second communication port P0, concrete transmission is similar to preceding sections with processes such as forwardings, does not repeat them here.
Such as shown in Fig. 3-b and Fig. 3-c, in some embodiments of the invention, above-mentioned 6th performance element can be rectification unit, and the first communication port P1 of above-mentioned 6th performance element can be connected with the second communication port P0 of the 9th performance element among an above-mentioned N3 performance element, wherein, above-mentioned 9th performance element is rectification unit or inversion unit.
Such as shown in Fig. 3-d and Fig. 3-e, in some embodiments of the invention, above-mentioned 6th performance element can be inversion unit, first communication port P1 of above-mentioned 6th performance element is connected with the second communication port P0 of the 8th performance element in an above-mentioned N3 performance element, wherein, above-mentioned 8th performance element is rectification unit or inversion unit.
Be appreciated that, such as Fig. 3-b, Fig. 3-c, Fig. 3-d and Fig. 3-e citing illustrate, in N3 the performance element of being connected by communication port, rectification unit and inversion unit can interlacedly arrange, and certain rectification unit and inversion unit also can not interlaced arrangements.
In some embodiments of the invention, the communication port of performance element and control module can be the communication port of optical fiber communication port or ethernet communication port or level signal communication port or Differencing communication interface or other type.
Can finding out, the invention provides a kind of multimachine frequency converter, the synchronous and/or unsynchronized revolution of parallel operation can be realized, realizing with adopting multiple frequency converter in prior art compared with the method for parallel function, significantly reducing and realizing cost; Wherein, replace 485 bus communication modes in conventional inverter device multi-computer system with the communication mode of serial (as switching Ethernet communication modes) between the main control unit and multiple performance element of frequency converter, and then be conducive to eliminating the defect that signal transmission anti-interference is poor, transmission range is short, the super teletransmission being conducive to realizing antijamming capability strong is defeated, and then is conducive to the reliability improving frequency converter multiple unit operation scene.Interconnect architecture between main control unit and performance element is relatively simple, and installation wiring is relatively simple, and visible this structure is conducive to the wire structures complicacy simplifying frequency converter multimachine scene.Further, owing to being connected by communication port between performance element, being conducive to the extendability improving frequency converter multiple unit operation like this, multiple performance element can being connected to meet corresponding demand according to different scene by communication port.
Main for framework shown in Fig. 3-a below, some modes producing synchronizing signal are introduced in multimachine frequency converter in citing.The mode producing synchronizing signal in multimachine frequency converter under other framework can be analogized.
In some embodiments of the invention, described main control unit 301 for, periodically send the first system reference clock signal produced by the first system reference clock; Calculate the time bias value corresponding with each inversion unit in a described X2 inversion unit, and send described time bias value corresponding with it to each inversion unit in a described X2 inversion unit.Wherein, each inversion unit in a described X2 inversion unit, for after receiving described time bias value corresponding with it, the described time bias value received is utilized to carry out time migration compensation to local clock, the described the first system reference clock signal sent by the described main control unit 301 be currently received based on phaselocked loop and the described local clock carried out after time migration compensation carry out step locking, and the clock signal produced based on described local clock generates the synchronizing signal of the pulse width modulation wave produced for this inversion unit of synchronous correction.
Main for framework shown in Fig. 3-a below, some modes that the operation that multimachine frequency converter is introduced in citing controls.The operation control method of the multimachine frequency converter under other framework can be analogized.
In some embodiments of the invention, described main control unit 301 for, send pulse width modulation wave critical data corresponding with it to each inversion unit in a described X2 inversion unit.Each inversion unit in a described X2 inversion unit is used for, and generates synchronizing signal; Pulse width modulation wave is produced based on the pulse width modulation wave critical data from described main control unit 301 received, the described pulse width modulation wave utilizing described synchronizing signal synchronous correction to produce, utilizes the described pulse width modulation wave drive motor work after synchronous correction.
Refer to Fig. 4-a, Fig. 4-a is the structural representation of the another kind of multimachine frequency converter that another embodiment of the present invention provides.Wherein, as depicted in fig. 4-a, the another kind of multimachine frequency converter that another embodiment of the present invention provides can comprise: main control unit 401, a N5 rectification unit 402, N6 the inversion unit 403 of being connected by communication port.
Wherein, an above-mentioned N5 rectification unit 402 and an above-mentioned N6 inversion unit 403 common DC bus 410.
Wherein, first communication port P1 of above-mentioned main control unit 401 is connected with the second communication port P0 of the first inversion unit in an above-mentioned N6 inversion unit, wherein, above-mentioned N5 is positive integer, above-mentioned N6 be greater than 1 positive integer, above-mentioned first inversion unit is the inversion unit being in one end marginal position among above-mentioned N6 the inversion unit of being connected by communication port.Wherein, Fig. 4-a illustrates in framework, one end marginal position of N6 inversion unit after series connection is first inversion unit of residue second communication port P0, other end marginal position is second inversion unit of residue first communication port P1, and the first inversion unit remaining second communication port P0 is connected with the first communication port P1 of above-mentioned main control unit 401.
Can find out, in framework shown in Fig. 4-a illustrates, N5 rectification unit 402 is not by the uncontrollable rectification unit that main control unit 401 controls.And in previous embodiment, as shown in Fig. 2-a ~ Fig. 2-g, framework or 2-a ~ Fig. 2-e illustrate in shown framework, some rectification units are can by the controlled rectification unit of master control unit controls.
Wherein, main control unit 401 can send command word, data word and/or status word etc. to the first inversion unit by the first communication port P1, specifically sends similar to preceding sections with the process such as forwarding, does not repeat them here.
Can finding out, the invention provides a kind of multimachine frequency converter, the synchronous and/or unsynchronized revolution of parallel operation can be realized, realizing with adopting multiple frequency converter in prior art compared with the method for parallel function, significantly reducing and realizing cost; 485 bus communication modes in conventional inverter device multi-computer system are replaced with the communication mode of serial between the main control unit and inversion unit of frequency converter, and then be conducive to eliminating the defect that signal transmission anti-interference is poor, transmission range is short, the super teletransmission being conducive to realizing antijamming capability strong is defeated, and then is conducive to the reliability improving frequency converter multiple unit operation scene.Interconnect architecture between main control unit and inversion unit is relatively simple, and installation wiring is relatively simple, and visible this structure is conducive to the wire structures complicacy simplifying frequency converter multiple unit operation scene.Further, owing to being connected by communication port between inversion unit, being conducive to the extendability improving frequency converter multiple unit operation scene like this, multiple inversion unit can being connected to meet corresponding demand according to different scene by communication port.
See Fig. 4-b, Fig. 4-b illustrates among some embodiments of the present invention, main control unit 401 comprises second communication port P0, it is connected with the first communication port P1 of the second inversion unit in an above-mentioned N6 inversion unit, wherein, above-mentioned second inversion unit is the inversion unit being in other end marginal position in above-mentioned N6 the inversion unit of being connected by communication port.
Be appreciated that, Fig. 4-b shows a kind of communications loop project organization, introducing communications loop makes the communication port between each unit have redundant backup function, main control unit 401 can send command word, data word and/or status word etc. by the first communication port P1 and/or second communication port P0 to each inversion unit, this is just equivalent to the communication port providing two transmission of informations, fault-resistant and fault-tolerant ability are enhanced, and are conducive to further elevator system reliability of operation.
In some embodiments of the invention, the communication port of inversion unit, rectification unit, control module can be the communication port of optical fiber communication port or ethernet communication port or level signal communication port or Differencing communication interface or other type.
Main for framework shown in Fig. 4-a below, some modes producing synchronizing signal are introduced in multimachine frequency converter in citing.The mode producing synchronizing signal in multimachine frequency converter under other framework can be analogized.
In some embodiments of the invention, described main control unit 401 for, periodically send the first system reference clock signal produced by the first system reference clock; Calculate the time bias value corresponding with each inversion unit in a described N6 inversion unit, and send described time bias value corresponding with it to each inversion unit in a described N6 inversion unit.Wherein, each inversion unit in a described N6 inversion unit, for after receiving described time bias value corresponding with it, the described time bias value received is utilized to carry out time migration compensation to local clock, the described the first system reference clock signal sent by the described main control unit 401 be currently received based on phaselocked loop and the described local clock carried out after time migration compensation carry out step locking, and the clock signal produced based on described local clock generates the synchronizing signal of the pulse width modulation wave produced for this inversion unit of synchronous correction.
Main for framework shown in Fig. 4-a below, some modes that the operation that multimachine frequency converter is introduced in citing controls.The operation control method of the multimachine frequency converter under other framework can be analogized.
In some embodiments of the invention, described main control unit 401 for, send pulse width modulation wave critical data corresponding with it to each inversion unit in a described N6 inversion unit.Each inversion unit in a described N6 inversion unit is used for, and generates synchronizing signal; Pulse width modulation wave is produced based on the pulse width modulation wave critical data from described main control unit 401 received, the described pulse width modulation wave utilizing described synchronizing signal synchronous correction to produce, utilizes the described pulse width modulation wave drive motor work after synchronous correction.
Refer to Fig. 5, Fig. 5 is the structural representation of the another kind of multimachine frequency converter that an alternative embodiment of the invention provides.Wherein, as shown in Figure 5, the another kind of multimachine frequency converter that an alternative embodiment of the invention provides can comprise:
Main control unit 501, a N9 rectification unit 502, N7 the inversion unit 503 of being connected by communication port and N8 the inversion unit 504 of being connected by communication port.Wherein, an above-mentioned N9 rectification unit, an above-mentioned N7 inversion unit and above-mentioned N8 inversion unit common DC bus 510.
Wherein, first communication port P1 of above-mentioned main control unit 501 is connected with the second communication port P0 of the 3rd inversion unit in above-mentioned N7 the inversion unit 503 of being connected by communication port, and the second communication port P0 of above-mentioned main control unit 501 is connected with the first communication port P1 of the 4th inversion unit in above-mentioned N8 the inversion unit 504 of being connected by communication port.
Wherein, above-mentioned N7 and above-mentioned N8 is positive integer, above-mentioned 3rd inversion unit is the inversion unit being in one end marginal position in above-mentioned N7 the inversion unit of being connected by communication port, wherein, above-mentioned 4th inversion unit is the inversion unit being in one end marginal position in above-mentioned N8 the inversion unit of being connected by communication port.
Wherein, Fig. 5 illustrates in framework, one end marginal position of N7 inversion unit 503 after series connection is the 3rd inversion units of residue second communication port P0, other end marginal position is the 5th inversion unit of residue first communication port P1, and the 3rd inversion unit remaining second communication port P0 is connected with the first communication port P1 of above-mentioned main control unit 501.One end marginal position of N8 inversion unit 504 after series connection is the 4th inversion units of residue first communication port P1, other end marginal position is the 6th inversion unit of residue second communication port P0, and the remaining first communication port P1 of the 4th inversion unit is connected with the second communication port P0 of above-mentioned main control unit 501.
Can find out, Fig. 5 illustrates in shown framework, and N9 rectification unit 502 is not by the uncontrollable rectification unit that main control unit 501 controls.And in previous embodiment, as shown in Fig. 2-a ~ Fig. 2-g, framework or 2-a ~ Fig. 2-e illustrate in shown framework, some rectification units are can by the controlled rectification unit of master control unit controls.
Compared with framework shown in Fig. 4-a illustrated in above-described embodiment, in framework shown in Fig. 5, at least 1 inversion unit can be disposed respectively in main control unit 501 both sides, and in framework shown in Fig. 4-a, the wherein side of main control unit 301 just deploys at least two inversion units.
In some embodiments of the invention, the communication port of inversion unit, rectification unit, control module can be the communication port of optical fiber communication port or ethernet communication port or level signal communication port or Differencing communication interface or other type.
Wherein, main control unit 501 can send command word, data word and/or status word etc. to the 3rd inversion unit and the second inversion unit respectively by the first communication port P1 and second communication port P0, concrete transmission is similar to preceding sections with processes such as forwardings, does not repeat them here.
Can finding out, the invention provides a kind of multimachine frequency converter, the synchronous and/or unsynchronized revolution of parallel operation can be realized, realizing with adopting multiple frequency converter in prior art compared with the method for parallel function, significantly reducing and realizing cost; 485 bus communication modes in conventional inverter device multi-computer system are replaced with the communication mode of serial between the main control unit and inversion unit of frequency converter, and then be conducive to eliminating the defect that signal transmission anti-interference is poor, transmission range is short, the super teletransmission being conducive to realizing antijamming capability strong is defeated, and then is conducive to the reliability improving frequency converter multiple unit operation scene.Interconnect architecture between main control unit and inversion unit is relatively simple, and installation wiring is relatively simple, and visible this structure is conducive to the wire structures complicacy simplifying frequency converter multiple unit operation scene.Further, owing to being connected by communication port between inversion unit, being conducive to the extendability improving frequency converter multiple unit operation scene like this, multiple inversion unit can being connected to meet corresponding demand according to different scene by communication port.
Main for framework shown in Fig. 5 below, some modes producing synchronizing signal are introduced in multimachine frequency converter in citing.The mode producing synchronizing signal in multimachine frequency converter under other framework can be analogized.
In some embodiments of the invention, described main control unit 501 for, periodically send the first system reference clock signal produced by the first system reference clock; Calculate the time bias value corresponding with each inversion unit in N10 inversion unit, and send described time bias value corresponding with it to each inversion unit in a described N10 inversion unit.
Wherein, each inversion unit in a described N10 inversion unit, for after receiving described time bias value corresponding with it, the described time bias value received is utilized to carry out time migration compensation to local clock, step locking is carried out based on the phaselocked loop described the first system reference clock signal sent by the described main control unit 501 be currently received and the described local clock carried out after time migration compensation, the clock signal produced based on described local clock generates the synchronizing signal of the pulse width modulation wave produced for this inversion unit of synchronous correction, wherein, a described N10 inversion unit comprises a described N7 inversion unit and a described N8 inversion unit.
Main for framework shown in Fig. 5 below, some possibility modes that the operation that multimachine frequency converter is introduced in citing controls.The operation control method of the multimachine frequency converter under other framework can be analogized.
In some embodiments of the invention, described main control unit 501 for, send pulse width modulation wave critical data corresponding with it to each inversion unit in a described N10 inversion unit; Wherein, a described N10 inversion unit comprises a described N7 inversion unit and a described N8 inversion unit.
Each inversion unit in a described N10 inversion unit is for generating synchronizing signal; Pulse width modulation wave is produced based on the pulse width modulation wave critical data from described main control unit 501 received, the described pulse width modulation wave utilizing described synchronizing signal synchronous correction to produce, utilizes the described pulse width modulation wave drive motor work after synchronous correction.
In the above-described embodiments, the description of each embodiment is all emphasized particularly on different fields, in certain embodiment, there is no the part described in detail, can see the associated description of other embodiments.
Those skilled in the art can be well understood to, and for convenience and simplicity of description, the specific works process of the device of foregoing description, with reference to the corresponding process in preceding method embodiment, can not repeat them here.In several embodiments that the application provides, should be understood that disclosed apparatus and method can realize by another way.Such as, device embodiment described above is only schematic, such as, the division of said units, be only a kind of logic function to divide, actual can have other dividing mode when realizing, such as multiple unit or assembly can in conjunction with or another system can be integrated into, or some features can be ignored, or do not perform.Another point, shown or discussed coupling each other or direct-coupling or communication connection can be by some ports, and the indirect coupling of device or unit or communication connection can be electrical or other form.The above-mentioned unit illustrated as separating component or can may not be and physically separates, and the parts as unit display can be or may not be physical location, namely can be positioned at a place, or also can be distributed in multiple network element.Some or all of unit wherein can be selected according to the actual needs to realize the object of the present embodiment scheme.In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, also can be that the independent physics of unit exists, also can two or more unit in a unit integrated.Above-mentioned integrated unit both can adopt the form of hardware to realize, and the form of SFU software functional unit also can be adopted to realize.If above-mentioned integrated unit using the form of SFU software functional unit realize and as independently production marketing or use time, can be stored in a computer read/write memory medium.
The above, above embodiment only in order to technical scheme of the present invention to be described, is not intended to limit; Although with reference to previous embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (13)
1. a multimachine frequency converter, is characterized in that, comprising:
Main control unit, N1 the performance element of being connected by communication port, wherein, described N1 performance element common DC bus;
Wherein, first communication port of described main control unit is connected with the second communication port of the first performance element in a described N1 performance element, wherein, a described N1 performance element comprises N11 rectification unit and N12 inversion unit altogether, described N11 is positive integer, described N12 be greater than 1 positive integer, described first performance element is the performance element being in one end marginal position among described N1 the performance element of being connected by communication port.
2. multimachine frequency converter according to claim 1, is characterized in that,
The second communication port of described main control unit is connected with the first communication port of the second performance element in a described N1 performance element, wherein, described second performance element is the performance element being in other end marginal position in described N1 the performance element of being connected by communication port.
3. multimachine frequency converter according to claim 1, is characterized in that,
Described multimachine frequency converter also comprises N2 the performance element of being connected by communication port, and a described N2 performance element is described DC bus altogether;
The second communication port of described main control unit is connected with the first communication port of the 3rd performance element in described N2 the performance element of being connected by communication port, wherein, described N2 is positive integer, a described N2 performance element comprises rectification unit and/or inversion unit, wherein, described 3rd performance element is the performance element being in one end marginal position in described N2 the performance element of being connected by communication port.
4. the multimachine frequency converter according to any one of claims 1 to 3, is characterized in that,
Described first performance element is inversion unit, and the first communication port of described first performance element is connected with the second communication port of the 4th performance element in a described N1 performance element, and wherein, described 4th performance element is rectification unit or inversion unit;
Or,
Described first performance element is rectification unit, and the first communication port of described first performance element is connected with the second communication port of the 5th performance element in a described N1 performance element, and wherein, described 5th performance element is rectification unit or inversion unit.
5. the multimachine frequency converter according to any one of Claims 1-4, is characterized in that,
Described communication port is optical fiber communication port or ethernet communication port or level signal communication port or Differencing communication interface.
6. a multimachine frequency converter, is characterized in that, comprising:
Main control unit, N3 the performance element of being connected by communication port and N4 the performance element of being connected by communication port;
Wherein, a described N3 performance element and described N4 performance element common DC bus;
Wherein, first communication port of described main control unit is connected with the second communication port of the 6th performance element in described N3 the performance element of being connected by communication port, and the second communication port of described main control unit is connected with the first communication port of the 7th performance element in described N4 the performance element of being connected by communication port;
Wherein, X1 rectification unit and X2 inversion unit is comprised altogether in a described N3 performance element and a described N4 performance element, wherein, described X1 is positive integer, described X2 be greater than 1 positive integer, described 6th performance element is the performance element being in one end marginal position in described N3 the performance element of being connected by communication port, and described 7th performance element is the performance element being in one end marginal position in described N4 the performance element of being connected by communication port.
7. multimachine frequency converter according to claim 6, is characterized in that,
Described 6th performance element is rectification unit, and the second communication port that the first communication port of described 6th performance element is connected with the 9th performance element in a described N3 performance element connects, and wherein, described 9th performance element is rectification unit or inversion unit;
Or;
Described 6th performance element is inversion unit, and the first communication port of described 6th performance element is connected with the second communication port of the 8th performance element in a described N3 performance element, and wherein, described 8th performance element is rectification unit or inversion unit.
8. the multimachine frequency converter according to any one of claim 6 to 7, is characterized in that,
Described communication port is optical fiber communication port or ethernet communication port or level signal communication port or Differencing communication interface.
9. a multimachine frequency converter, is characterized in that, comprising:
Main control unit, a N5 rectification unit, N6 the inversion unit of being connected by communication port,
Wherein, a described N5 rectification unit and described N6 inversion unit common DC bus;
Wherein, first communication port of described main control unit is connected with the second communication port of the first inversion unit in a described N6 inversion unit, described N5 is positive integer, described N6 be greater than 1 positive integer, described first inversion unit is the inversion unit being in one end marginal position among described N6 the inversion unit of being connected by communication port.
10. multimachine frequency converter according to claim 9, is characterized in that,
The second communication port of described main control unit is connected with the first communication port of the second inversion unit in a described N6 inversion unit, wherein, described second inversion unit is the inversion unit being in other end marginal position in described N6 the inversion unit of being connected by communication port.
11. multimachine frequency converters according to claim 9 to 10 any one, is characterized in that, described communication port is optical fiber communication port or ethernet communication port or level signal communication port or Differencing communication interface.
12. 1 kinds of multimachine frequency converters, is characterized in that, comprising:
Main control unit, a N9 rectification unit, N7 the inversion unit of being connected by communication port and N8 the inversion unit of being connected by communication port; Wherein, a described N9 rectification unit, a described N7 inversion unit and described N8 inversion unit common DC bus;
Wherein, first communication port of described main control unit is connected with the second communication port of the first inversion unit in described N7 the inversion unit of being connected by communication port, and the second communication port of described main control unit is connected with the first communication port of the second inversion unit in described N8 the inversion unit of being connected by communication port;
Wherein, described N7 and described N8 is positive integer, described first inversion unit is the inversion unit being in one end marginal position in described N7 the inversion unit of being connected by communication port, wherein, described second inversion unit is the inversion unit being in one end marginal position in described N8 the inversion unit of being connected by communication port.
13. multimachine frequency converters according to claim 12, is characterized in that,
Described communication port is optical fiber communication port or ethernet communication port or level signal communication port or Differencing communication interface.
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| PCT/CN2014/078968 WO2015180152A1 (en) | 2014-05-30 | 2014-05-30 | Multi-machine frequency converter |
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| CN105763131A (en) * | 2016-04-01 | 2016-07-13 | 苏州汇川技术有限公司 | Power-off synchronous operation method and system for frequency converter |
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| CN105431792B (en) | 2018-02-02 |
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