CN202930966U

CN202930966U - Three-phase grid connection inverter

Info

Publication number: CN202930966U
Application number: CN2012206511986U
Authority: CN
Inventors: 彭景生
Original assignee: HUBEI TRESS TECHNOLOGY Co Ltd
Current assignee: HUBEI TRESS TECHNOLOGY Co Ltd
Priority date: 2012-11-30
Filing date: 2012-11-30
Publication date: 2013-05-08
Anticipated expiration: 2022-11-30

Abstract

Disclosed is a three-phase grid connection inverter, comprising a solar cell panel, an inversion unit, a control circuit, a relay, and a fan, wherein the solar cell panel is connected with an input terminal of the inversion unit; an output terminal of the inversion unit is connected with an input terminal of the relay, with an output terminal of the relay being connected with a fan and connected to an electrical network; a sensor is arranged between the solar cell panel and the inversion unit; the control circuit comprises a control chip and a drive circuit for controlling the operation of the relay; and the control chip is provided with a reception module for receiving the voltage sensor signals, a determining module used for judging the state of the input signals, and a drive signal module for outputting control drive circuit signals. The three-phase grid connection inverter of the utility model utilizes a voltage sensor or a current transformer to detect the voltage/current output state of a solar cell panel, determines whether a solar cell panel is in the non-operating state or not, automatically switches the operation of the fan, and avoids the problem that the fan still operates when the inversion unit is not at work, thereby reducing the power loss.

Description

Three-phase grid-connected inverter

Technical field

The utility model is specifically related to a kind of three-phase grid-connected inverter.

Background technology

Present three-phase grid-connected inverter is equipped with fan, be used for inverter is dispelled the heat, and fan control, all to adopt temperature control to control, when the fan temperature was too low, the judgement inversion unit was in off position, thereby turn-offed the work of fan, has retardance, when dispelling the heat when slow, easily make the fan continuous firing, cause the waste of electric power, and adopt temperature control to control, easily cause when starting, because temperature is not high, and the fan that causes does not start, easily make the inverter excess Temperature, affect useful life.

The utility model content

For the deficiency of above technology, the purpose of this utility model is to provide a kind of three-phase grid-connected inverter of energy instant shut-in fan.

The technical scheme that its technical problem that solves the utility model adopts is:

a kind of three-phase grid-connected inverter, it comprises solar panel, inversion unit, control circuit, relay and fan, described solar panel is connected with the input of inversion unit, the output of inversion unit is connected with the input of relay one end, output one end of relay connects fan and accesses electrical network, be provided with transducer between described solar panel and inversion unit, described control circuit comprises control chip and is used for the drive circuit of control relay work, described control chip is provided with the receiver module of using with the receiver voltage sensor signal, be used for the judge module of judgement status input signal and be used for the driving signaling module that the drive circuit signal is controlled in output, described drive circuit is that the control chip output signal is to the base stage of triode Q202, the grounded emitter of triode Q202, coil one end of the collector connection relay RLY202 of triode Q202, the other end series resistance R266 of coil connects power supply, the switching pin of relay R LY202 connects an end of the coil of relay, the other end of the coil of often driving pin connection relay of relay R LY202.

Described transducer is current transformer or voltage sensor.

Described drive circuit is provided with LED 1.

The collector electrode one end series diode D202 of described triode Q202 connects power supply.

One end of one end connection transformer T1 output of the coil of described relay, the other end of transformer T1 output connects the other end of relay coil.

The input of described transformer T1 is connected to the three-phase electricity output.

Described relay output end is provided with filter circuit, and described filter circuit comprises 3 path filter U1.

The beneficial effects of the utility model are, detect voltage or the electric current output state of solar panel by voltage sensor or current transformer, judge whether solar panel is in non operating state, thereby automatically open or cut off the work of fan, avoid fan continuous firing in the idle situation of inversion unit, loss electric power.

Description of drawings

Fig. 1 is circuit diagram of the present utility model.

Fig. 2 is drive circuit schematic diagram of the present utility model.

Fig. 3 is the structure chart of control chip of the present utility model.

Embodiment

Below in conjunction with accompanying drawing, the utility model is further illustrated:

with reference to figure 1, Fig. 2 and Fig. 3 are described, the utility model comprises solar panel 1, inversion unit 2, control circuit, relay 3 and fan 4, described solar panel 1 is connected with the input of inversion unit 2, the output of inversion unit 2 is connected with input one end of relay 3, output one end of relay 3 connects fan 4 and accesses electrical network, be provided with transducer between described solar panel 1 and inversion unit 2, described control circuit comprises control chip 8 and is used for the drive circuit 9 of control relay work, described control chip 8 is provided with the receiver module 10 of using with the receiver voltage sensor signal, be used for the judge module 11 of judgement input signal and be used for the driving signaling module 12 that the drive circuit signal is controlled in output.Described transducer comprises current transformer 6 and voltage sensor 7.

Described drive circuit is that control chip 8 output signals are to the base stage of triode Q202; the grounded emitter of triode Q202; coil one end of the collector connection relay RLY202 of triode Q202; the collector electrode one end series diode D202 of described triode Q202 connects power supply; play the reverse protection effect; the other end series resistance R266 of coil connects power supply; the switching pin of relay R LY202 connects an end of the coil of relay 3, the other end of the coil of often driving pin connection relay 3 of relay R LY202.

Described drive circuit is provided with LED 1.The end of the reverse sending and receiving optical diode of the collector electrode of triode Q202 LED1, the other end series resistance R265 of LED 1 connects power supply.

One end of one end connection transformer T1 output of the coil of described relay 3, the other end of transformer T1 output connects the other end of relay 3 coils.

The input of described transformer T1 is connected to the three-phase electricity output, and described relay 3 outputs are provided with filter circuit 5, and described filter circuit 5 comprises 3 path filter U1, realizes the filtering of output voltage.

Solar panel 1 is input to inversion unit 2 with direct current, be arranged at inversion unit 2 front current transformer 6 or voltage sensors 7 and the signal that detects be input to the receiver module 10 of control chip 8, receiver module 10 is input to judge module 11 with signal, judge by judge module 11 whether inversion unit 2 starts, then by driving signaling module 12 output drive signals to triode Q202.When judge module 11 judges that inversion unit 2 is in running order, drive signaling module 12 and send high level signal to the base stage of triode Q202, make triode Q202 conducting, thereby make relay R LY202 coil excessively electric, make and often open the pin adhesive, make the coil two ends connection of relay 3, then be arranged on the transformer T1 work of output, relay 3 coils are excessively electric, make relay 3 work, and inversion unit 2 output voltages make fan 4 work.When judge module 11 judges that inversion unit 2 is not in running order, drive signaling module 12 and send low level signal to the base stage of triode Q202, make not conducting of triode Q202, thereby make only electricity of relay R LY202 coil, make and often open the pin disconnection, thereby relay 3 is not worked, fan 4 is not worked, when realizing solar panel 1 work and not working, unnecessary power consumption has been avoided in the work of instantaneous opening and closing fan 4.

Above-mentioned is only the embodiment of utility model, but design concept of the present utility model is not limited to this, allly utilizes this design to carry out the change of unsubstantiality to the utility model, all should belong to the behavior of invading the utility model protection range.

Claims

1. three-phase grid-connected inverter, it includes solar panel (1), inversion unit (2), control circuit, relay (3) and fan (4), it is characterized in that: described solar panel (1) is connected with the input of inversion unit (2), the output of inversion unit (2) is connected with input one end of relay (3), output one end of relay (3) connects fan (4) and accesses electrical network, be provided with transducer between described solar panel (1) and inversion unit (2), described control circuit comprises control chip (8) and is used for the drive circuit (9) of control relay (3) work, described control chip (8) is provided with the receiver module (10) of using with the receiver voltage sensor signal, be used for the judge module (11) of judgement status input signal and be used for the driving signaling module (12) that drive circuit (9) signal is controlled in output, described drive circuit (9) is that control chip (8) output signal is to the base stage of triode Q202, the grounded emitter of triode Q202, coil one end of the collector connection relay RLY202 of triode Q202, the other end series resistance R266 of coil connects power supply, the switching pin of relay R LY202 connects an end of the coil of relay (3), the other end of the coil of often driving pin connection relay (3) of relay R LY202.

2. three-phase grid-connected inverter according to claim 1, it is characterized in that: described transducer is current transformer (6) or voltage sensor (7).

3. three-phase grid-connected inverter according to claim 1, it is characterized in that: described drive circuit (9) is provided with LED 1.

4. three-phase grid-connected inverter according to claim 1, it is characterized in that: the collector electrode one end series diode D202 of described triode Q202 connects power supply.

5. three-phase grid-connected inverter according to claim 1, is characterized in that: an end of an end connection transformer T1 output of the coil of described relay (3), the other end of other end connection relay (3) coil of transformer T1 output.

6. three-phase grid-connected inverter according to claim 5, it is characterized in that: the input of described transformer T1 is connected to the three-phase electricity output.

7. three-phase grid-connected inverter according to claim 1, it is characterized in that: described relay (3) output is provided with filter circuit (5), and described filter circuit (5) comprises 3 path filter U1.