CN104868770A - Control circuit of switching device - Google Patents

Control circuit of switching device Download PDF

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Publication number
CN104868770A
CN104868770A CN201510034255.4A CN201510034255A CN104868770A CN 104868770 A CN104868770 A CN 104868770A CN 201510034255 A CN201510034255 A CN 201510034255A CN 104868770 A CN104868770 A CN 104868770A
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CN
China
Prior art keywords
switching device
control
switch element
control circuit
electric current
Prior art date
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Granted
Application number
CN201510034255.4A
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Chinese (zh)
Other versions
CN104868770B (en
Inventor
陈汉威
游俊豪
刘家桦
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FSP Technology Inc
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FSP Technology Inc
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Priority to US14/623,470 priority Critical patent/US9741503B2/en
Publication of CN104868770A publication Critical patent/CN104868770A/en
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Publication of CN104868770B publication Critical patent/CN104868770B/en
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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/36—Means for starting or stopping converters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
    • H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
    • H02H7/122—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for inverters, i.e. dc/ac converters
    • H02H7/1225—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for inverters, i.e. dc/ac converters responsive to internal faults, e.g. shoot-through
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/12—Arrangements for reducing harmonics from ac input or output
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
    • H02S50/00—Monitoring or testing of PV systems, e.g. load balancing or fault identification
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/0003—Details of control, feedback or regulation circuits
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/0048—Circuits or arrangements for reducing losses
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
    • 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
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy
    • Y02E10/56—Power conversion systems, e.g. maximum power point trackers

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Inverter Devices (AREA)
  • Dc-Dc Converters (AREA)
  • Electronic Switches (AREA)
  • Supply And Distribution Of Alternating Current (AREA)

Abstract

The present invention provides a control circuit of a switching device. A single output pin of a control unit outputs start signals to control ends of two switching units, so as to control open states of the two switching units and adjust the size of a control current used for controlling the conducting state of the switching device, wherein one switching unit switches to a close state in a period of preset time after receiving the start signal, so as to reduce power consumption of the switching device.

Description

The control circuit of switching device
Technical field
The present invention relates to a kind of control circuit, particularly relate to a kind of control circuit of switching device.
Background technology
Inverter (inverter) is a kind of power supply change-over device, and it is normally converted to interchange out-put supply by the switching of power semiconductor direct-current input power supplying.General photovoltaic parallel in system can arrange relay and electromagnetic interference (Electromagnetic Interference between inverter and electrical network, be called for short EMI) filter, relay can isolated inverter and electrical network, recharges to avoid electrical network burst current to cause inverter damage to inverter.
Although relay can effectively isolated inverter and electrical network, right relay needs larger electric current to start, in the prior art, fixing big current generally can be provided to carry out starting relay, so in fact relay only needs small area analysis to maintain the state of its unlatching after being activated, and thus will cause unnecessary electric energy loss.
Summary of the invention
The invention provides a kind of control circuit of switching device, the electric energy loss of switching device can be reduced.
The control circuit of switching device of the present invention comprises the first switch element, second switch unit and control unit.Wherein the first end of the first switch element and second switch unit couples switching device, and the second end of the first switch element and second switch unit couples ground connection.Control unit has an output connecting pin, couple the control end of the first switch element and second switch unit, the control end of enabling signal to the first switch element and second switch unit is exported from output connecting pin, with conducting first switch element and second switch unit, and produce on the common joint of the first switch element and second switch unit and control electric current, control the conducting state of electric current in order to control switch device, wherein the first switch element one section of Preset Time after receiving enabling signal transfers closed condition to.
In one embodiment of this invention, the first above-mentioned switch element and second switch unit are in the conducting state time-division indescribably for the first current path and the second current path, and control electric current and provide the first electric current and the second electric current to flow to the first current path and the second current path respectively with actuating switch device, wherein the current value of the first electric current is greater than the current value of the second electric current.
In one embodiment of this invention, the first above-mentioned switch element controls electric current when transferring closed condition to provides the second electric current to flow to the second current path to maintain the conducting state of switching device.
In one embodiment of this invention, the first above-mentioned switch element comprises transistor and capacitor cell.Wherein transistor couples is between switching device and ground connection.Between the control end of capacitor cell coupling transistors and output connecting pin.
In one embodiment of this invention, the first above-mentioned switch element also comprises discharge cell, and it is coupled between the control end of transistor and ground connection.
In one embodiment of this invention, above-mentioned discharge cell comprises diode, the control end of its negative electrode and positive electrode difference coupling transistors and ground connection.
In one embodiment of this invention, the control circuit of above-mentioned switching device, also comprises resistance, and it is coupled between the control end of transistor and capacitor cell.
In one embodiment of this invention, above-mentioned second switch unit comprises flow-restriction and transistor.Wherein flow-restriction is coupled to switching device.Transistor couples is between flow-restriction and ground connection, and the control end of transistor couples output connecting pin.
In one embodiment of this invention, above-mentioned flow-restriction is resistance.
In one embodiment of this invention, the control circuit of above-mentioned switching device also comprises resistance, and it is coupled between the control end of transistor and output connecting pin.
In one embodiment of this invention, above-mentioned switching device is relay.
Based on above-mentioned, embodiments of the invention are by exporting the control end of enabling signal to the first switch element and second switch unit from the output connecting pin of control unit, electric current is controlled to produce on the common joint of the first switch element and second switch unit, control the conducting state of electric current in order to control switch device, wherein the first switch element one section of Preset Time after receiving enabling signal transfers closed condition to, to reduce the electric energy loss of switching device.
For above-mentioned feature and advantage of the present invention can be become apparent, special embodiment below, and coordinate accompanying drawing to be described in detail below.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the control circuit of the switching device of one embodiment of the invention.
Fig. 2 is the schematic diagram of the control circuit of the switching device of another embodiment of the present invention.
Fig. 3 is the schematic diagram that the control circuit of the switching device of one embodiment of the invention is applied in photovoltaic parallel in system.
Description of reference numerals:
102: switching device;
104,106: switch element;
108: control unit;
110: inverter circuit;
120: Electromagnetic interference filter;
130: control circuit;
202: discharge cell;
204: flow-restriction;
P1: output connecting pin;
S1: enabling signal;
I1: control electric current;
I1', I2': electric current;
R1 ~ R4: resistance;
C1: capacitor cell;
Q1, Q2: transistor;
D1: diode;
PV: photovoltaic module;
EG: electrical network.
Embodiment
Fig. 1 is the schematic diagram of the control circuit of the switching device of one embodiment of the invention.Please refer to Fig. 1, the control circuit of switching device 102 comprises switch element 104, switch element 106 and control unit 108, wherein switching device 102 can be such as relay, switch element 104 couples switching device 102 with the first end of switch element 106, and switch element 104 is then coupled to ground connection with the second end of switch element 106.Control unit 108 has an output connecting pin P1, and it couples the control end of switch element 104 and switch element 106.
Control unit 108 can export enabling signal S1 to control end with switch element 106 of switch element 104 from its output connecting pin P1, with actuating switch unit 104 and switch element 106, and control electric current I 1, with the conducting state of control switch device 102 in switch element 104 and common joint (i.e. the common joint of the first end of switch element 104 and switch element 106) the upper generation of switch element 106.Wherein, switch element 104 and switch element 106 can provide the first current path and the second current path when being in conducting state respectively, and make control electric current I 1 provide electric current I 1' and electric current I 2' to flow to the first current path and the second current path respectively, namely control the summation that electric current I 1 is electric current I 1' and electric current I 2', the current value of electric current I 1' can be greater than the current value of electric current I 2' in some embodiments.It should be noted that, switch element 104 one section of Preset Time after receiving enabling signal S1 will transfer closed condition to, namely only surplus switch element 106 provides the second current path, and the current value controlling electric current I 1 equals the current value of electric current I 2', and causes the current value controlling electric current I 1 to diminish.Wherein, switching device 102 is switched on when switch element 104 and switch element 106 are in conducting state, and after switching device 102 is switched on, though switch element 104 transfers closed condition to, but the electric current I 2' that switch element 106 provides still can make switching device 102 maintain the state of conducting, therefore effectively can reduce electric energy loss when not affecting the operation of switching device 102.
Fig. 2 is the schematic diagram of the control circuit of the switching device of another embodiment of the present invention.Please refer to Fig. 2, in the present embodiment, switch element 104 can comprise resistance R1, resistance R2, capacitor cell C1, transistor Q1 and discharge cell 202, resistance R1 is coupled between the collector of switching device 102 and transistor Q1, transistor Q1 is coupled between resistance R1 and ground connection, resistance R2 and capacitor cell C1 is series between the control end (i.e. base stage) of transistor Q1 and the output connecting pin P1 of control unit 108, discharge cell 202 be coupled to transistor Q1 between control end and ground connection.Wherein, discharge cell 202 is in the present embodiment for implement with a diode D1, and the negative electrode and positive electrode of diode D1 distinguishes control end and the ground connection of coupling transistors Q1.
On the other hand, switch element 106 can comprise resistance R3, transistor Q2 and flow-restriction 204 in the present embodiment.Flow-restriction 204 is coupled between the collector of switching device 102 and transistor Q2, flow-restriction 204 is for implement with resistance R4 in the present embodiment, resistance R4 is coupled between the collector of switching device 102 and transistor Q2, flow-restriction 204 can also other modes be implemented in other embodiments, such as, implement with the resistance of more serial or parallel connection.The emitter-base bandgap grading of transistor Q2 is coupled to ground connection, and the control end (i.e. base stage) of transistor Q2 is then coupled to one end of resistance R3, and the other end of resistance R3 then couples control unit 108.In some embodiments, above-mentioned switch element 104 also can not comprise resistance R1, resistance R2, and switch element 106 can not comprise resistance R3, namely the collector of transistor Q1 and control end directly can be coupled to switching device 102 and capacitor cell C1 respectively, and the control end of transistor Q2 can directly be coupled to control unit 108.
When for starting switch device 102, the base stage of the exportable enabling signal S1 of control unit 108 to transistor Q1 and transistor Q2, enabling signal S1 is a current signal in the present embodiment.Enabling signal S1 can turn-on transistor Q1 and transistor Q2, and produces on switch element 104 with the common joint of switch element 106 and control electric current I 1, and then opening switch device 102.The electric current wherein flowing to capacitor cell C1 gradually will hold unit C1 by full charging, after one section of Preset Time, capacitor cell C1 will present the state of open circuit, make transistor Q1 enter the state of closedown, and cannot continue to supply electric current I 1', and then control electric current I 1 is diminished.On the other hand, the electric current provided due to control unit 108 is still output to the base stage of transistor Q2 sustainably, and therefore transistor Q2 supplies electric current I 2' sustainably, and makes switching device 102 maintain the state of unlatching.Wherein the size of electric current I 2' adjusts by flow-restriction 204, and as in the present embodiment, when the resistance of resistance R4 increases, electric current I 2' will diminish.
So provide large control electric current I 1 (=I1'+I2') can opening switch device 102 (as relay) in the early stage by control circuit, and after switching device 102 is activated, the control electric current I 1 (=I2') that changing into provides less can continue the opening maintaining switching device 102, and can reduce the loss of electric energy.In addition, embodiments of the invention only need single output connecting pin P1 can reach the conducting state of control switch unit 104 and switch element 106, and then change the effect controlling electric current I 1 size.
The application of the control circuit of switching device can such as shown in Fig. 3.Fig. 3 is the schematic diagram that the control circuit of the switching device of one embodiment of the invention is applied in photovoltaic parallel in system.Please refer to Fig. 3, photovoltaic parallel in system can comprise photovoltaic module PV, switching device 102, inverter circuit 110, Electromagnetic interference filter 120, control circuit 130 and electrical network EG.Wherein inverter circuit 110 couples photovoltaic module PV and switching device 102, control circuit 130 couple switching device 102, Electromagnetic interference filter 120 couples switching device 102 and electrical network EG.
Photovoltaic module PV can react the intensity output dc voltage of sunlight to inverter circuit 110, the electrical network EG exporting to rear end to allow inverter circuit 110 that direct voltage is converted to alternating voltage uses, and Electromagnetic interference filter 120 is arranged at the electromagnetic noise that can suppress alternating voltage between inverter circuit 110 and electrical network EG.In addition, switching device 102 is controlled by control circuit 130 and changes its conducting state, and then is isolated with electrical network EG by inverter circuit 110, and switching device 102 is relay in the present embodiment.Wherein control circuit 130 can be implemented as the mode as described in above-described embodiment, does not repeat them here.The conducting state carrying out control switch device 102 by control circuit 130 not only can isolated inverter and electrical network effectively, and avoid electrical network to recharge burst current causes inverter damage to inverter, also can change the state of opening to maintain it with small area analysis after switching device 102 is activated, and unnecessary electric energy loss can be reduced.
In sum, the present invention exports the control end of enabling signal to two switch element by the single output connecting pin of control unit, to control the opening of two switch elements, and then adjustment is in order to the control size of current of the conducting state of control switch device, wherein a switch element one section of Preset Time after receiving enabling signal transfers closed condition to, to reduce the electric energy loss of switching device.
Last it is noted that above each embodiment is only in order to illustrate technical scheme of the present invention, be not intended to limit; Although with reference to foregoing embodiments 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 some or all of technical characteristic; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technical scheme.

Claims (11)

1. a control circuit for switching device, is characterized in that, comprising:
First switch element;
Second switch unit, the first end of this first switch element and this second switch unit couples this switching device, and the second end of this first switch element and this second switch unit couples ground connection; And
Control unit, there is output connecting pin, couple the control end of this first switch element and this second switch unit, the control end of enabling signal to this first switch element and this second switch unit is exported from this output connecting pin, with this first switch element of conducting and this second switch unit, and produce on the common joint of this first switch element and this second switch unit and control electric current, this control electric current is in order to control the conducting state of this switching device, and wherein this first switch element Preset Time after receiving this enabling signal transfers closed condition to.
2. the control circuit of switching device according to claim 1, it is characterized in that, this first switch element and this second switch unit are in the conducting state time-division indescribably for the first current path and the second current path, and this control electric current provides the first electric current and the second electric current to flow to this first current path and this second current path respectively with this switching device of conducting, wherein the current value of this first electric current is greater than the current value of this second electric current.
3. the control circuit of described switching device according to claim 2, is characterized in that, when this first switch element transfers closed condition to, this control electric current provides this second electric current to flow to this second current path to maintain the conducting state of this switching device.
4. the control circuit of switching device according to claim 1, is characterized in that, this first switch element comprises:
Transistor, is coupled between this switching device and this ground connection; And
Capacitor cell, couples between the control end of this transistor and this output connecting pin.
5. the control circuit of switching device according to claim 4, is characterized in that, this first switch element also comprises:
Discharge cell, is coupled between the control end of this transistor and this ground connection.
6. the control circuit of switching device according to claim 5, is characterized in that, this discharge cell comprises:
Diode, its negative electrode and positive electrode couples control end and this ground connection of this transistor respectively.
7. the control circuit of switching device according to claim 4, is characterized in that, also comprises:
Resistance, is coupled between the control end of this transistor and this capacitor cell.
8. the control circuit of switching device according to claim 1, is characterized in that, this second switch unit comprises:
Flow-restriction, is coupled to this switching device; And
Transistor, is coupled between this flow-restriction and this ground connection, and the control end of this transistor couples this output connecting pin.
9. the control circuit of switching device according to claim 8, is characterized in that, this flow-restriction is resistance.
10. the control circuit of switching device according to claim 8, is characterized in that, also comprises:
Resistance, is coupled between the control end of this transistor and this output connecting pin.
The control circuit of 11. switching devices according to claim 1, is characterized in that, this switching device is relay.
CN201510034255.4A 2014-02-26 2015-01-23 The control circuit of switching device Active CN104868770B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US14/623,470 US9741503B2 (en) 2014-02-26 2015-02-16 Control circuit of switch device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201461944587P 2014-02-26 2014-02-26
US61/944,587 2014-02-26

Publications (2)

Publication Number Publication Date
CN104868770A true CN104868770A (en) 2015-08-26
CN104868770B CN104868770B (en) 2017-07-14

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CN201510031553.8A Active CN104868764B (en) 2014-02-26 2015-01-22 Inverter and its power conversion method
CN201520047286.9U Active CN204465376U (en) 2014-02-26 2015-01-23 Inverter and alternating current voltage sampling circuit thereof
CN201510034255.4A Active CN104868770B (en) 2014-02-26 2015-01-23 The control circuit of switching device
CN201510039793.2A Active CN104868493B (en) 2014-02-26 2015-01-27 Inverter and its control method
CN201510039055.8A Pending CN104868766A (en) 2014-02-26 2015-01-27 Inversion device and AC power supply system applying same
CN201510039854.5A Pending CN104865458A (en) 2014-02-26 2015-01-27 Inversion device and method for detecting operation of island
CN201510079043.8A Pending CN104917414A (en) 2014-02-26 2015-02-13 Inverting apparatus and control method thereof
CN201510078647.0A Active CN104868767B (en) 2014-02-26 2015-02-13 Inverter and its control method
CN201510078631.XA Active CN104901566B (en) 2014-02-26 2015-02-13 Inverter and its control method
CN201510083340.XA Active CN104917361B (en) 2014-02-26 2015-02-16 Inverter and its control method
CN201510083338.2A Active CN104917413B (en) 2014-02-26 2015-02-16 Inverter and its control method
CN201510083477.5A Active CN104935199B (en) 2014-02-26 2015-02-16 Inverter
CN201510083292.4A Active CN104917455B (en) 2014-02-26 2015-02-16 Inverting apparatus and photovoltaic power system using the same

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CN201520047286.9U Active CN204465376U (en) 2014-02-26 2015-01-23 Inverter and alternating current voltage sampling circuit thereof

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CN201510039793.2A Active CN104868493B (en) 2014-02-26 2015-01-27 Inverter and its control method
CN201510039055.8A Pending CN104868766A (en) 2014-02-26 2015-01-27 Inversion device and AC power supply system applying same
CN201510039854.5A Pending CN104865458A (en) 2014-02-26 2015-01-27 Inversion device and method for detecting operation of island
CN201510079043.8A Pending CN104917414A (en) 2014-02-26 2015-02-13 Inverting apparatus and control method thereof
CN201510078647.0A Active CN104868767B (en) 2014-02-26 2015-02-13 Inverter and its control method
CN201510078631.XA Active CN104901566B (en) 2014-02-26 2015-02-13 Inverter and its control method
CN201510083340.XA Active CN104917361B (en) 2014-02-26 2015-02-16 Inverter and its control method
CN201510083338.2A Active CN104917413B (en) 2014-02-26 2015-02-16 Inverter and its control method
CN201510083477.5A Active CN104935199B (en) 2014-02-26 2015-02-16 Inverter
CN201510083292.4A Active CN104917455B (en) 2014-02-26 2015-02-16 Inverting apparatus and photovoltaic power system using the same

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