CN2785233Y - Modularization parallel connection inversion power supply equipment - Google Patents
Modularization parallel connection inversion power supply equipment Download PDFInfo
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- CN2785233Y CN2785233Y CN 200520054612 CN200520054612U CN2785233Y CN 2785233 Y CN2785233 Y CN 2785233Y CN 200520054612 CN200520054612 CN 200520054612 CN 200520054612 U CN200520054612 U CN 200520054612U CN 2785233 Y CN2785233 Y CN 2785233Y
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Abstract
The utility model relates to the technical field of the inverse power supply, particularly to a modularized parallel inverse power supply device. A direct current input terminal of a control unit is connected with an external direct current power supply, and an alternating current input terminal is connected with an external alternating current power supply; an inverse control output terminal of the utility model is coupled with control bus, and a switching control output terminal is connected with an inverse switching unit 6 of commercial power; a plurality of inverters with instantaneous voltage control forms are connected in parallel by using current equalizing bus, wherein a power terminal of each inverter is connected with the external direct current power supply, and a control terminal of each inverter is coupled with the control bus; an inverse output terminal of each inverter is connected with the inverse switching unit of the commercial power; the output terminal of the inverse switching unit of the commercial power is connected with an alternating current output bus bar. The utility model has the advantages of simple realization, low cost, adoption of method of waif current equalization, simple control, large quantity of parallel modules, easy realization of modularization and realization of supplying power without break.
Description
[technical field]
The utility model relates to the inverter field, particularly a kind of modular parallel inverter power supply device.
[background technology]
In existing UPS, inverter power supply, the frequent use exchanges output-parallel technology realization modularization, high-power so that improve reliability, maintainability, the easy dilatancy of system.Alternating current theory in parallel requires the output voltage of each parallel operation unit (inverter), phase place in full accord in real time.This requirement implements more complicated.Usually the mode that adopts software and hardware to combine is adjusted the output voltage and the phase place of each parallel operation unit (inverter), guarantee its voltage and phase difference in the scope of a strictness, and auxiliary parallel operation inductance (what have may not have) is realized parallel operation.Its software algorithm complexity, the hardware that matches are also complicated; Simultaneously this software and hardware implementation research and development and production cost are all than higher; And this parallel operation implementation can quantity in parallel generally be no more than 6, is not suitable for the requirement of modularization multi-machine parallel connection.
[summary of the invention]
The utility model proposes a kind of modular parallel inverter power supply device at the deficiencies in the prior art, can overcome the defective of prior art.
The technical scheme that its technical problem that solves the utility model adopts is:
The modular parallel inverter power supply device comprises inverter, control bus, the current-sharing bus of control unit, several tool instantaneous voltage control forms and exchanges the output bus, also comprises civil power inversion switch unit;
The direct-flow input end of described control unit links to each other with external direct current power supply, and its ac input end links to each other with external AC power supply, its inversion control output and the coupling of described control bus, and its switching controls output links to each other with described civil power inversion switch unit;
The inverter of described several tool instantaneous voltage control forms connects by described current-sharing bus parallel connection; Wherein the power end of each inverter links to each other with external direct current power supply, its control end and the coupling of described control bus, and its inverting output terminal links to each other with described civil power inversion switch unit;
The output of described civil power inversion switch unit links to each other with the described output bus that exchanges.
Device described in the utility model also comprises maintenance bypass switch, and an end of described maintenance bypass switch links to each other with external AC power supply, the other end with exchange the output bus and link to each other.
Described control unit comprises master control module, assist control module, first switch and second switch;
The direct-flow input end of described master control module and assist control module links to each other with external direct current power supply, its ac input end links to each other with external AC power supply, its inversion control output connects first switch and second switch respectively, and its switching controls output links to each other with described civil power inversion switch unit;
The other end of described first switch and second switch all links to each other with control bus, is respectively applied for the break-make of the described master control module of control and assist control module and control bus.
Described control unit also comprises control switching circuit, is connected between master control module and the assist control module, finishes switching between master control module and the assist control module by the break-make of controlling first switch and second switch.。
Described control unit also comprises contact point signal output circuit and monitoring unit, is connected between master control module and the assist control module, and being respectively applied for provides a contact point signal and the supervisory circuit for the user monitoring running situation for user's expanding system.
Described master control module is identical with the structure of assist control module, comprises
First auxiliary power circuit, its direct-flow input end links to each other with external direct current power supply, and its ac input end links to each other with external AC power supply, and its output links to each other with the power end of detection signal treatment circuit with the central processing unit circuit respectively;
The detection signal treatment circuit, it is input as detection signal, is output as the digital signal corresponding to described detection signal;
The central processing unit circuit, it is input as described digital signal, is output as control signals such as module control signal, SPWM control signal, civil power inversion switch-over control signal; Described module control signal outputs on the described control bus by described inversion control output, and described civil power inversion switch-over control signal outputs to civil power inversion switch unit by described switching controls output;
The genlock circuit, it is input as described SPWM control signal, is output as through the SPWM control signal after the fine setting;
The Sine Wave Pulse Width Modulation circuit, it is input as described through the SPWM control signal after the fine setting, is output as the SPWM signal; Described SPWM signal outputs on the described control bus by described inversion control output.
Also comprise communication interface circuit and demonstration and switching signal circuit in the described master control module;
The input of described communication interface circuit links to each other with the central processing unit circuit, and its output can link to each other with host computer; The input of demonstration and switching signal circuit links to each other with the central processing unit circuit, and its output contact signal is to the contact point signal output circuit.
The structure of the inverter of described several tool instantaneous voltage control forms is identical, comprises
Second auxiliary power circuit, its power end links to each other with external direct current power supply, and its output links to each other with the power end of circuit such as PWM modulation circuit respectively;
The PWM modulation circuit, its output links to each other with the control end of DC/DC translation circuit;
The DC/DC translation circuit, its power end links to each other with external direct current power supply, and its output links to each other with the input of DC/AC inverter circuit;
The DC/AC inverter circuit, its output links to each other with the described output bus that exchanges, and it finishes the required control signal of conversion is described SPWM signal.
Described inverter also comprises:
Voltage control circuit, its input connects the output of feedback circuit respectively, output, voltage setting circuit and the output of second auxiliary power circuit of first computing circuit links to each other, and an one output is exported a voltage control signal and exported a module status signal to described PWM modulation circuit, output and export a power control signal to second auxiliary power circuit to master control module or assist control module, an output;
The voltage feedback circuit, its input connects the output of DC/DC translation circuit, and its output connects the input of voltage control circuit;
The first current feedback circuit, its input connects the output of DC/DC translation circuit, and its output connects the input of first computing circuit;
First computing circuit, its output connects the input of voltage control circuit;
The second current feedback circuit, its input connects the output of DC/AC inverter circuit, and its output connects the input of second computing circuit;
Second computing circuit, its output connects the input of voltage setting circuit;
Voltage setting circuit, its output connects the input of voltage control circuit;
Described current-sharing bus is connected in the input of voltage setting circuit.
Described inverter also comprises the inverter radiating module, and its power end connects described second auxiliary power circuit, and its output outputs on the control bus as a kind of of detection signal.
The beneficial effects of the utility model are: realize that 1, simply cost is low; 2, adopt the dereliction current-equalizing method, control is simple; 3, module number in parallel is many; 4, easily realize modularization; 5, owing to the control method that adopts dual controller, and have civil power inversion switch unit 6, can accomplish: when a controller failure, enable another controller control, when the inversion module fault, switch to mains-supplied.Really accomplish the free of discontinuities power supply.
[description of drawings]
Fig. 1 is the system principle diagram of modular parallel inverter power supply device in the utility model.
Fig. 2 is the structural principle block diagram of control unit in the utility model.
Fig. 3 is the circuit structure theory diagram of control module in the utility model.
Fig. 4 is the circuit structure theory diagram of inverter in the utility model.
Fig. 5 is the circuit structure theory diagram of inverter among second embodiment of the utility model.
[embodiment]
The utility model is further described with preferred embodiment of the present utility model with reference to the accompanying drawings below.
Embodiment 1:
As shown in Figure 1, the modular parallel inverter power supply device comprises that bus 5 and maintenance bypass switch 7 are exported in inverter 2, civil power inversion switch unit 6, control bus 3, current-sharing bus 4, the interchange of control unit 1, several tool instantaneous voltage control forms.
The direct-flow input end of control unit 1 links to each other with external direct current power supply DC, and its ac input end links to each other with external AC power supply AC, its inversion control output and 3 couplings of described control bus, and its switching controls output links to each other with described civil power inversion switch unit 6.The inverter 2 of described several tool instantaneous voltage control forms is connected in parallel by described current-sharing bus 4; Wherein the power end of each inverter 2 links to each other with external direct current power supply DC, its control end and 3 couplings of described control bus, and its inverting output terminal links to each other with described civil power inversion switch unit 6.The output of civil power inversion switch unit 6 links to each other with the described output bus 5 that exchanges.One end of maintenance bypass switch 7 links to each other with external AC power supply AC, the other end with exchange output bus 5 and link to each other.
Under normal condition, maintenance bypass switch 7 is in off-state, and controller detects the operating state of each inverter 2 in real time, and sends control signals to each inverter 2, the work of control inverter 2.The structure of each inverter 2 is all identical, finishes autonomous equalizing current by current-sharing bus 4, and the inverter current of its output outputs to after by civil power inversion switch unit 6 and exchanges output bus 5, is electric.When control unit 1 detect inverter 2 break down cause the inversion no-output after, can send civil power inversion switch-over control signal automatically to civil power inversion switch unit 6, directly power to the load by civil power, guarantee that power supply is uninterrupted.Civil power inversion switch unit 6 adopts ghyristor circuits, switch speed fast (switching time 2ms ~ 4ms), the safe and reliable operation of proof load.In order to guarantee that the sinusoidal waveform of load end is indeformable when civil power and the inversion power supply conversion, inverter 2 must keep its output voltages and civil powers with homophases frequently, and this point is to follow the tracks of city's signal of telecommunication realization by the benchmark sinusoidal signal that produces in the control unit 1.
When whole device need overhaul, with maintenance bypass switch 7 closures, beginning was powered to the load by civil power, and this moment, control unit 1 and each inverter 2 were deviate from from system, can carry out maintenance work, had guaranteed that simultaneously power supply do not interrupt.
As shown in Figure 2, control unit 1 comprises master control module 11, assist control module 12, control switching circuit 13, contact point signal output circuit 14, monitoring unit 15, first K switch 1 and second switch K2.
Contact point signal output circuit 14 is such as circuit such as light emitting diode display circuit and buzzer alarm circuits, is used for the running status of display system.
Under normal condition, two control modules are worked simultaneously, because the second switch K2 that is connected on the assist control module 12 is in off-state, therefore have only the SPWM signal in the master control module 11 can output on the control bus 3, each inverter 2 is carried out inversion control.After detecting malfunction (for example detecting the inversion system no-output), central processing unit circuit 113 sends a switch-over control signal to control switching circuit 13, control switching circuit 13 output switching signals, then be connected to the relay adhesive of assist control module 12, the relay that is connected on the master control module 11 disconnects, and master control module 11 is deactivated.Operating personnel can extract maintenance with master control module 11, insert again after to be repaired the getting well again, and utilize the manual switchover button to make master control module 11 enter operating state, and assist control module 12 is deactivated automatically.
As shown in Figure 3, master control module 11 comprises first auxiliary power circuit 111, detection signal treatment circuit 112, central processing unit circuit 113, genlock circuit 114, Sine Wave Pulse Width Modulation circuit 115, communication interface circuit 116 and demonstration and switching signal circuit 117.
First auxiliary power circuit 111 is used for external direct current is converted to the 5V of the different brackets of internal circuit needs such as detection signal treatment circuit 112 and central processing unit circuit 113,12V, and ± 15V etc. control voltage.Detection signal treatment circuit 112 is used for converting the detection signal of input to digital detection signal that central processing unit circuit 113 can be discerned.Described detection signal comprises inverter voltage, reverse frequency and the module status signal of two inversion module group outputs.After the digital detection signal of 113 pairs of inputs of central processing unit circuit is handled, output SPWM control signal to genlock circuit 114, output civil power inversion switch-over control signal to civil power inversion switch unit 6 (by described switching controls output), the outputting communication signal to host computer, output system running status to show and switching signal circuit 117, the group start of output control inversion module and the module control signal that turn-offs to control bus 3, export switch-over control signal to control switching circuit 13.Genlock circuit 114 outputs to Sine Wave Pulse Width Modulation circuit 115 with described SPWM control signal after finely tuning, Sine Wave Pulse Width Modulation circuit 115 sends the SPWM signal of control inversion to control bus 3 according to the SPWM control signal that receives, send identical SPWM signal to inverter 2, so just guaranteed that module is operated in same-phase and same frequency.
The operator can be connected whole system by communication interface circuit 116 with host computer, show the running status of whole system by host computer, by host computer system is controlled etc.For example, the operator keys in required instruction at host computer, and host computer will obtain line voltage value, inverter voltage value, output voltage values, output current value, output frequency value, input direct voltage value, built-in temperature value etc.; Also can obtain as civil power whether fault, inversion whether fault, output be at civil power or in the whether whether state indication of fault etc. of fault, module of inverter mode, direct current, make system have operability.Demonstration and switching signal circuit 117 are contact point signals of preparing for expanding system.The operator can increase light emitting diode display circuit and be used for the running status of display system on the basis of demonstration and switching signal circuit 117, or increases a buzzer alarm circuit etc., and when system broke down, this warning circuit was reported to the police automatically.In the utility model, the output signal of demonstration and switching signal circuit 117 is just received on the contact point signal output circuit 14, finishes above-mentioned functions by contact point signal output circuit 14.
Phase-locked synchronous circuit is used to guarantee that the power work frequency of inverter 2 outputs is in certain scope: when the frequency of mains supply in allowed limits, the out-put supply frequency and the mains supply of inverter 2 keep phase-locked synchronized relation.So just guaranteed in the middle of operation, if when carrying out civil power inverter power supply and switching, just can be because of civil power and inverter frequency and phase place different, the unnecessary circulation of generation between static switch.After the frequency of mains supply surpasses the scope that allows, inverter 2 power supplys will no longer be followed mains supply, get back to local oscillation frequency.
As shown in Figure 4, mainly comprise second auxiliary power circuit 21, PWM modulation circuit 22, DC/DC translation circuit 23, DC/AC inverter circuit 24 and voltage control circuit 25 etc. in the inverter 2.Second auxiliary power circuit 21 is used for external direct current is converted to the 12V of the different brackets of PWM modulation circuit 22 needs such as internal circuit such as grade, and ± 15V etc. control voltage.PWM modulation circuit 22 is used to produce the required pwm signal of DC/DC translation circuit 23.DC/DC translation circuit 23 is used for external direct current is converted to the required direct current of DC/AC inverter circuit 24, realizes the isolation of input and power supply simultaneously.DC/AC inverter circuit 24 is used for converting described direct current to load required alternating current, and it finishes the required control signal of conversion is described SPWM signal.Voltage control circuit 25 is used for the various signals of importing it are handled, export a voltage control signal and control the pwm signal that described PWM modulation circuit 22 produces suitable width, export a module status signal to master control module 11 or assist control module 12, export a power control signal and control the reference voltage size that it sends to second auxiliary power circuit 21.Described module status signal is a kind of in the detection signal, comprises module failure signal etc.The input of voltage feedback circuit 26 connects the output of DC/DC translation circuit 23, and its output connects the input of voltage control circuit 25.The input of the first current feedback circuit 27 connects the output of DC/DC translation circuit 23, and its output connects the input of first computing circuit 28.The output of first computing circuit 28 connects the input of voltage control circuit 25.The input of the second current feedback circuit 29 connects the output of DC/AC inverter circuit 24, and its output connects the input of second computing circuit 210.The output of second computing circuit 210 connects the input of voltage setting circuit 211.The output of voltage setting circuit 211 connects the input of voltage control circuit 25.
The feedback signal of voltage feedback circuit 26, first computing circuit 28 and come from the current-sharing signal acting in conjunction of current-sharing bus 4, the modulation of control PWM ripple, because the current-sharing signal is load current the maximum in the inverter 2 of same phase load, make that the output of each inverter 2 is approaching to maximum power, average mark is undertaken live stream.After inverter 2 transshipped for 150% a period of times, voltage control circuit 25 control PWM ripples made the DC bus-bar voltage retraction, and inverter 2 is limit the power protection.
The module control signal of described central processing unit circuit 113 outputs just sends on second auxiliary power circuit 21 by control bus 3, breaks down when needing off line when control module detects inverter 2, can close second auxiliary power circuit 21 automatically.
Described current-sharing bus 4 is connected to the input of voltage setting circuit 211.The sharing control that each inverter is 2 adopts maximum current-equalizing method to realize the current-sharing of 2 of each inverters, makes each inverter 2 average load sharing power.Inverter 2 adopts the hot plug terminal with being connected of load, can realize online insertion and removal.
Embodiment 2:
As shown in Figure 5, inverter 2 is to have increased an inverter radiating module 212 on the basis of Fig. 4 in the present embodiment.Described inverter radiating module 212 is made of radiator fan, temperature sensor and interlock circuit, and by the power supply of second auxiliary power circuit 21, its output and master control module 11 link to each other with detection signal treatment circuit 112 inputs in the assist control module 12.When temperature was higher than 35 ℃ in the inverter 2, radiator fan started; When temperature was higher than 65 ℃ in the inverter 2, inverter 2 was deactivated, and sent the excess temperature fault-signal to control module simultaneously.Described excess temperature fault-signal also is a kind of in the detection signal.
Identical among other circuit and the embodiment 1.
Claims (10)
1, modular parallel inverter power supply device, comprise inverter (2), control bus (3), the current-sharing bus (4) of control unit (1), several tool instantaneous voltage control forms and exchange output bus (5), it is characterized in that: also comprise civil power inversion switch unit (6);
The direct-flow input end of described control unit (1) links to each other with external direct current power supply, its ac input end links to each other with external AC power supply, its inversion control output and described control bus (3) coupling, its switching controls output links to each other with described civil power inversion switch unit (6);
The inverter (2) of described several tool instantaneous voltage control forms is connected in parallel by described current-sharing bus (4); Wherein the power end of each inverter (2) links to each other with external direct current power supply, its control end and described control bus (3) coupling, and its inverting output terminal links to each other with described civil power inversion switch unit (6);
The output of described civil power inversion switch unit (6) links to each other with the described output bus (5) that exchanges.
2, modular parallel inverter power supply device according to claim 1 is characterized in that: also comprise maintenance bypass switch (7), an end of described maintenance bypass switch (7) links to each other with external AC power supply, the other end with exchange output bus (5) and link to each other.
3, modular parallel inverter power supply device according to claim 1 is characterized in that: described control unit (1) comprises master control module (11), assist control module (12), first switch (K1) and second switch (K2);
Described master control module (11) links to each other with external direct current power supply with the direct-flow input end of assist control module (12), its ac input end links to each other with external AC power supply, its inversion control output connects first switch (K1) and second switch (K2) respectively, and its switching controls output links to each other with described civil power inversion switch unit (6);
The other end of described first switch (K1) and second switch (K2) all links to each other with control bus (3), is respectively applied for the break-make of control described master control module (11) and assist control module (12) and control bus (3).
4, modular parallel inverter power supply device according to claim 3, it is characterized in that: also comprise control switching circuit (13), be connected between master control module (11) and the assist control module (12), finish switching between master control module (11) and the assist control module (12) by the break-make of controlling first switch (K1) and second switch (K2).
5, modular parallel inverter power supply device according to claim 3, it is characterized in that: also comprise contact point signal output circuit (14) and monitoring unit (15), be connected between master control module (11) and the assist control module (12), being respectively applied for provides a contact point signal and the supervisory circuit for the user monitoring running situation for user's expanding system.
6, modular parallel inverter power supply device according to claim 3 is characterized in that: described master control module (11) is identical with the structure of assist control module (12), comprises
First auxiliary power circuit (111), its direct-flow input end links to each other with external direct current power supply, and its ac input end links to each other with external AC power supply, and its output links to each other with the power end of detection signal treatment circuit (112) with central processing unit circuit (113) respectively;
Detection signal treatment circuit (112), it is input as detection signal, is output as the digital signal corresponding to described detection signal;
Central processing unit circuit (113), it is input as described digital signal, is output as control signals such as module control signal, SPWM control signal, civil power inversion switch-over control signal; Described module control signal outputs on the described control bus (3) by described inversion control output, and described civil power inversion switch-over control signal outputs to civil power inversion switch unit (6) by described switching controls output;
Genlock circuit (114), it is input as described SPWM control signal, is output as through the SPWM control signal after the fine setting;
Sine Wave Pulse Width Modulation circuit (115), it is input as described through the SPWM control signal after the fine setting, is output as the SPWM signal; Described SPWM signal outputs on the described control bus (3) by described inversion control output.
7, according to claim 5 or 6 described modular parallel inverter power supply devices, it is characterized in that: also comprise communication interface circuit (116) and demonstration and switching signal circuit (117) in the described master control module (11);
The input of described communication interface circuit (116) links to each other with central processing unit circuit (113), and its output can link to each other with host computer; The input of demonstration and switching signal circuit (117) links to each other with central processing unit circuit (113), and its output contact signal is to contact point signal output circuit (14).
8, modular parallel inverter power supply device according to claim 1 is characterized in that: the structure of the inverter (2) of described several tool instantaneous voltage control forms is identical, comprises
Second auxiliary power circuit (21), its power end links to each other with external direct current power supply, and its output links to each other with the power end of PWM modulation circuit circuit such as (22) respectively;
PWM modulation circuit (22), its output links to each other with the control end of DC/DC translation circuit (23);
DC/DC translation circuit (23), its power end links to each other with external direct current power supply, and its output links to each other with the input of DC/AC inverter circuit (24);
DC/AC inverter circuit (24), its output links to each other with the described output bus (5) that exchanges, and it finishes the required control signal of conversion is described SPWM signal.
9, the modular parallel inverter power supply device stated of claim 8, it is characterized in that: described inverter (2) also comprises
Voltage control circuit (25), its input connects the output of feedback circuit respectively, output, voltage setting circuit (211) and the output of second auxiliary power circuit (21) of first computing circuit (28) links to each other, and an one output is exported a voltage control signal and exported a module status signal to described PWM modulation circuit (22), output and export a power control signal to second auxiliary power circuit (21) to master control module (11) or assist control module (12), an output;
Voltage feedback circuit (26), its input connects the output of DC/DC translation circuit (23), and its output connects the input of voltage control circuit (25);
The first current feedback circuit (27), its input connects the output of DC/DC translation circuit (23), and its output connects the input of first computing circuit (28);
First computing circuit (28), its output connects the input of voltage control circuit (25);
The second current feedback circuit (29), its input connects the output of DC/AC inverter circuit (24), and its output connects the input of second computing circuit (210);
Second computing circuit (210), its output connects the input of voltage setting circuit (211);
Voltage setting circuit (211), its output connects the input of voltage control circuit (25);
Described current-sharing bus (4) is connected in the input of voltage setting circuit (211).
10, modular parallel inverter power supply device according to claim 8, it is characterized in that: described inverter (2) also comprises inverter radiating module (212), its power end connects described second auxiliary power circuit (21), and its output outputs on the control bus (3) as a kind of of detection signal.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520054612 CN2785233Y (en) | 2005-02-03 | 2005-02-03 | Modularization parallel connection inversion power supply equipment |
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| CN 200520054612 CN2785233Y (en) | 2005-02-03 | 2005-02-03 | Modularization parallel connection inversion power supply equipment |
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| CN101557160B (en) * | 2009-05-15 | 2011-02-16 | 张强胜 | Ultralow-power standby circuit of inverter power supply |
| CN102170169A (en) * | 2011-03-30 | 2011-08-31 | 株洲南车时代电气股份有限公司 | Power-supply system of vehicle-mounted auxiliary inverter power source |
| CN101694971B (en) * | 2009-10-23 | 2013-03-20 | 中国科学院空间科学与应用研究中心 | Circuit for transforming direct current input power to alternating current output power |
| CN104917283A (en) * | 2014-03-11 | 2015-09-16 | 广东易事特电源股份有限公司 | UPS with forced bypass protection function |
| CN107465131A (en) * | 2017-09-14 | 2017-12-12 | 国网山东省电力公司 | A kind of intelligent mobile integrated power supply |
| CN109950966A (en) * | 2017-12-20 | 2019-06-28 | 台达电子工业股份有限公司 | Have the electrical power by-pass device and its control method of flow equalizing function |
| CN110212628A (en) * | 2019-04-24 | 2019-09-06 | 广东工业大学 | Solar energy power generating inversion control switching system and switching method |
| CN110467092A (en) * | 2019-07-24 | 2019-11-19 | 厦门劦通科技有限公司 | Elevator power failure emergency flat layer device and its method of supplying power to |
| CN112886796A (en) * | 2021-01-12 | 2021-06-01 | 温州贝塔电子科技有限公司 | Modular medium-high voltage alternating current power supply |
| CN112994492A (en) * | 2021-04-29 | 2021-06-18 | 康舒科技股份有限公司 | Inverter apparatus and output synchronization method thereof |
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| CN101557160B (en) * | 2009-05-15 | 2011-02-16 | 张强胜 | Ultralow-power standby circuit of inverter power supply |
| CN101694971B (en) * | 2009-10-23 | 2013-03-20 | 中国科学院空间科学与应用研究中心 | Circuit for transforming direct current input power to alternating current output power |
| CN102170169A (en) * | 2011-03-30 | 2011-08-31 | 株洲南车时代电气股份有限公司 | Power-supply system of vehicle-mounted auxiliary inverter power source |
| CN104917283A (en) * | 2014-03-11 | 2015-09-16 | 广东易事特电源股份有限公司 | UPS with forced bypass protection function |
| CN104917283B (en) * | 2014-03-11 | 2017-10-31 | 广东易事特电源股份有限公司 | It is a kind of that there is the ups power for forcing bypass protection function |
| CN107465131A (en) * | 2017-09-14 | 2017-12-12 | 国网山东省电力公司 | A kind of intelligent mobile integrated power supply |
| CN109950966A (en) * | 2017-12-20 | 2019-06-28 | 台达电子工业股份有限公司 | Have the electrical power by-pass device and its control method of flow equalizing function |
| CN110212628B (en) * | 2019-04-24 | 2021-12-10 | 广东工业大学 | Switching method of solar photovoltaic power generation inversion control switching system |
| CN110212628A (en) * | 2019-04-24 | 2019-09-06 | 广东工业大学 | Solar energy power generating inversion control switching system and switching method |
| CN110467092A (en) * | 2019-07-24 | 2019-11-19 | 厦门劦通科技有限公司 | Elevator power failure emergency flat layer device and its method of supplying power to |
| CN110467092B (en) * | 2019-07-24 | 2023-07-18 | 厦门劦通科技有限公司 | Elevator power failure emergency leveling device and power supply method thereof |
| CN112886796A (en) * | 2021-01-12 | 2021-06-01 | 温州贝塔电子科技有限公司 | Modular medium-high voltage alternating current power supply |
| CN112886796B (en) * | 2021-01-12 | 2022-06-28 | 温州贝塔电子科技有限公司 | Modular medium-high voltage alternating current power supply |
| CN112994492A (en) * | 2021-04-29 | 2021-06-18 | 康舒科技股份有限公司 | Inverter apparatus and output synchronization method thereof |
| CN112994492B (en) * | 2021-04-29 | 2024-03-29 | 康舒科技股份有限公司 | Inverter apparatus and output synchronization method thereof |
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