CN110784202A - Quick turn-off device capable of driving two series MOS (metal oxide semiconductor) tubes through single-path signal - Google Patents
Quick turn-off device capable of driving two series MOS (metal oxide semiconductor) tubes through single-path signal Download PDFInfo
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- CN110784202A CN110784202A CN201911217858.2A CN201911217858A CN110784202A CN 110784202 A CN110784202 A CN 110784202A CN 201911217858 A CN201911217858 A CN 201911217858A CN 110784202 A CN110784202 A CN 110784202A
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- 229910044991 metal oxide Inorganic materials 0.000 title abstract description 5
- 150000004706 metal oxides Chemical class 0.000 title abstract description 5
- 239000004065 semiconductor Substances 0.000 title abstract description 5
- 230000003287 optical effect Effects 0.000 claims description 61
- 239000003990 capacitor Substances 0.000 claims description 18
- 238000010248 power generation Methods 0.000 abstract description 9
- 238000010586 diagram Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 2
- 206010000369 Accident Diseases 0.000 description 1
- 206010014357 Electric shock Diseases 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
- H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
- H03K17/687—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being field-effect transistors
- H03K17/6871—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being field-effect transistors the output circuit comprising more than one controlled field-effect transistor
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- 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
- H02S40/00—Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
- H02S40/30—Electrical components
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
- H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
- H03K17/687—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being field-effect transistors
- H03K17/6877—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being field-effect transistors the control circuit comprising active elements different from those used in the output circuit
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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
- 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
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Abstract
The invention belongs to the technical field of power electronics, and particularly relates to a quick turn-off device capable of driving two series MOS (metal oxide semiconductor) tubes through a single-path signal, which comprises a switching tube S1, a switching tube S2, a control IC (integrated circuit) and a driving circuit; the PV + end of the photovoltaic module is connected with the output end OUT + through a switch tube S1 and a switch tube S2 which are sequentially connected in series; the PV-end of the photovoltaic module is connected with the output end OUT-; the control IC, the switch tube S1 and the switch tube S2 are respectively connected with a drive circuit, and two signal ends of the control IC control the on-off of the switch tube S1 and the switch tube S2 through the drive circuit. The invention adopts two switching tubes connected in series to carry out switching operation, greatly improves the reliability and safety of switching off the photovoltaic power generation system, and avoids high-voltage output caused by failure of a single tube when the switching off is needed, thereby avoiding the potential safety hazard of human body.
Description
Technical Field
The invention belongs to the technical field of power electronics, and particularly relates to a quick turn-off device capable of driving two series MOS (metal oxide semiconductor) tubes through a single-path signal.
Background
Solar energy is increasingly regarded as a renewable pollution-free green energy source, and meanwhile, with the progress of power electronic technology, the photovoltaic grid-connected power generation technology is rapidly developed. A plurality of photovoltaic modules are connected in series to form a photovoltaic string, and then the photovoltaic string is connected to an inverter to convert direct current into alternating current so as to realize grid-connected power generation. Considering that the photovoltaic modules connected in series form a direct current high voltage, which can cause personal risks and fire accidents, the photovoltaic power generation system is required to be quickly turned off at a module level in an emergency.
The requirement for rapid shutdown is mainly put forward in order to protect fire fighters, photovoltaic power station installation and maintenance personnel. Generally, in a photovoltaic power generation system, as long as the sunlight irradiates, the direct current side has 600V-1000V direct current high voltage, once a power station is in fire, fire fighters cannot carry out fire extinguishing and emergency rescue work before the whole power station is burnt out.
For the above reasons, it is very important to achieve a fast turn-off of each component in a photovoltaic power plant, and it is common practice to access a turn-off device outside each component. Under emergency, the connection between each photovoltaic module can be cut off through the cut-off device, so that the direct-current high voltage existing in the photovoltaic power generation system is eliminated, the electric shock risk is reduced, and the rescue risk is solved. However, the existing turn-off device adopts a single tube to turn off, and if the single tube fails, high-voltage output can be caused, so that the life of the fire fighter is threatened. In the existing turn-off device, a control part adopts a control IC, a turn-off signal receiving function is integrated in a special control IC, and meanwhile, only a single-path driving signal is provided, if the single-path signal is not processed, the control IC is difficult to enter a safe turn-off mode when the control IC fails, as shown in figure 1, when a single-path driving signal pin of the control IC is in short circuit with an adjacent pin, if a constant high level state occurs, a gate pole of an MOS switching tube is driven to be at a constant high level and to enter an on state, and safe turn-off cannot be realized.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the quick turn-off device which can drive the two series MOS tubes through a single-path signal, the two series-connected switching tubes are adopted for switching operation, the reliability and the safety of turn-off of the photovoltaic power generation system are greatly improved, high-voltage output caused by failure of a single tube when the turn-off is needed is avoided, and further the potential safety hazard of a human body is avoided.
The invention provides a quick turn-off device capable of driving two series MOS (metal oxide semiconductor) tubes through a single-channel signal, which comprises a switching tube S1, a switching tube S2, a control IC (integrated circuit) and a driving circuit, wherein the switching tube S1 is connected with the switching tube S2;
the PV + end of the photovoltaic module is connected with the output end OUT + through a switch tube S1 and a switch tube S2 which are sequentially connected in series; the PV-end of the photovoltaic module is connected with the output end OUT-;
the control IC, the switch tube S1 and the switch tube S2 are respectively connected with a drive circuit, and two signal ends of the control IC control the on-off of the switch tube S1 and the switch tube S2 through the drive circuit.
The quick turn-off device capable of driving the two series MOS tubes through a single-path signal further comprises an input capacitor Cin, an output capacitor Cout, a bypass diode D1 and an output resistor Rx;
the input capacitor Cin is connected with the photovoltaic component in parallel, one end of the output capacitor Cout is connected with the output end OUT +, the other end of the output capacitor Cout is connected with the output end OUT-, and the output capacitor Cout, the bypass diode D1 and the output resistor Rx are connected in parallel.
Preferably, the switching tube S1 is a MOS tube S1, and the switching tube S2 is a MOS tube S2;
the PV + end of the photovoltaic module is connected with the drain electrode of an MOS tube S2, the source electrode of the MOS tube S2 is connected with the drain electrode of an MOS tube S1, and the source electrode of the MOS tube S1 is connected with an output end OUT +; the driving end Drv2 of the driving circuit is connected with the gate of the MOS tube S2, and the driving end Drv1 of the driving circuit is connected with the gate of the MOS tube S1;
the common end of the MOS tube S2 connected with the MOS tube S1 is a reference end S2 GND.
Preferably, the driving circuit includes a first driving module and a second driving module;
the control IC, the first driving module and the second driving module are electrically connected in sequence, the driving end Drv2 of the second driving module is connected with the gate electrode of the MOS tube S2, and the driving end Drv1 of the second driving module is connected with the gate electrode of the MOS tube S1.
Preferably, the first driving module comprises an optical coupler OP1, a voltage regulator tube D3, a resistor R0, a resistor R1 and a resistor R2;
the first signal end of the control IC is connected with an input pin 2 of an optical coupler OP1 through a resistor R2 on one hand and an output pin 4 of the optical coupler OP1 on the other hand, and the second signal end of the control IC is connected with an input pin 1 of the optical coupler OP1 through a resistor R1 on the one hand, is grounded through a voltage regulator tube D3 on the one hand and is connected with a power supply VCC through a resistor R0 on the other hand.
Preferably, the second driving module comprises a switch tube Q1, a switch tube Q2, a switch tube Q3, a switch tube Q4, a voltage regulator tube D4, a voltage regulator tube D2 and a plurality of resistors;
the output pin 3 of the optical coupler OP1 is connected with the base of the switching tube Q1 through the resistor R3, connected with the base of the switching tube Q2 through the resistor R4 and grounded through the resistor R5;
the emitter of the switching tube Q1 is grounded, and the collector of the switching tube Q1 is connected with the gate of the switching tube Q3 on one hand and is connected with a power supply VCC through a resistor R6 on the other hand;
the emitter of the switching tube Q2 is grounded, and the collector of the switching tube Q2 is connected with the gate of the switching tube Q4 on one hand and is connected with a power supply VCC through a resistor R7 on the other hand;
the source electrode of the switch tube Q3 is grounded, and the drain electrode of the switch tube Q3 is connected with a power supply VDD through a resistor R8 on one hand and is connected with a driving end Drv1 through a resistor R10 on the other hand;
the source electrode of the switch tube Q4 is grounded, and the drain electrode of the switch tube Q4 is connected with a power supply VDD through a resistor R9 on one hand and is connected with a driving end Drv2 through a resistor R11 on the other hand;
the anode of the voltage-stabilizing tube D4 is connected with the output end OUT +, and the cathode of the voltage-stabilizing tube D4 is connected with the driving end Drv 1;
the anode of the voltage regulator tube D2 is connected with the reference end S2GND, and the cathode of the voltage regulator tube D2 is connected with the driving end Drv 2.
Preferably, the second driving module comprises a switching tube Q1, a switching tube Q2, a switching tube Q3, a switching tube Q4, an optical coupler OP2, an optical coupler OP3, a diode D4, a diode D2 and a plurality of resistors;
the output pin 3 of the optical coupler OP1 is grounded through a resistor R5, connected with the input pin 1 of the optical coupler OP2 through a resistor R4 and connected with the input pin 1 of the optical coupler OP3 through a resistor R7;
an input pin 2 of the optocoupler OP2 is grounded through a resistor R3, an output pin 4 of the optocoupler OP2 is connected with an output end OUT +, an output pin 3 of the optocoupler OP2 is connected with a power supply VDD through a resistor R9 and a resistor R10 which are sequentially connected in series, a common end of the resistor R9 and the resistor R10 is connected with a base electrode of a switching tube Q1, an emitter electrode of the switching tube Q1 is connected with the power supply VDD, a collector electrode of the switching tube Q1 is connected with a base electrode of a switching tube Q3 through a resistor R13, a base electrode of the switching tube Q3 is connected with a collector electrode of a triode Q3 through a resistor R15 on one hand, and is connected with an emitter electrode of a triode Q3 through a diode D4 on the other hand, a collector electrode of the triode Q3 is connected with the output end;
an input pin 2 of the optical coupler OP3 is grounded through a resistor R6, an output pin 4 of the optical coupler OP3 is connected with a reference end S2GND, an output pin 3 of the optical coupler OP3 is connected with a power supply VDD through a resistor R11 and a resistor R12 which are sequentially connected in series, a common end, connected with the resistor R11 and the resistor R12, is connected with a base electrode of a switching tube Q2, an emitter electrode of the switching tube Q2 is connected with the power supply VDD, a collector electrode of the switching tube Q2 is connected with a base electrode of a switching tube Q4 through a resistor R14, a base electrode of a switching tube Q4 is connected with a collector electrode of a triode Q4 through a resistor R16 and is connected with an emitter electrode of a triode Q4 through a diode D2, a collector electrode of the triode Q4 is connected with the reference end S2GND, and an emitter.
According to the technical scheme, the two switching tubes connected in series are used for switching, so that the reliability and safety of switching off the photovoltaic power generation system are greatly improved, high-voltage output caused by failure of a single tube when the photovoltaic power generation system needs to be switched off is avoided, and further personal safety hazards are avoided.
Drawings
In order to more clearly illustrate the detailed description of the invention or the technical solutions in the prior art, the drawings that are needed in the detailed description of the invention or the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.
FIG. 1 is a schematic diagram of a control IC for a single-channel driving signal in the prior art for short-circuiting adjacent pins;
fig. 2 is a circuit structure diagram of the fast turn-off device capable of driving two series MOS transistors by a single signal in this embodiment;
FIG. 3 is a first circuit diagram of the driving circuit of the present embodiment;
FIG. 4 is a second circuit structure diagram of the driving circuit of the present embodiment;
fig. 5 is a circuit configuration diagram of the power supply reference ground in the present embodiment.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It is also to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the specification of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be further understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.
As used in this specification and the appended claims, the term "if" may be interpreted contextually as "when", "upon" or "in response to a determination" or "in response to a detection". Similarly, the phrase "if it is determined" or "if a [ described condition or event ] is detected" may be interpreted contextually to mean "upon determining" or "in response to determining" or "upon detecting [ described condition or event ]" or "in response to detecting [ described condition or event ]".
The first embodiment is as follows:
the embodiment provides a fast turn-off device capable of driving two series MOS transistors through a single signal, as shown in fig. 2, including a switching tube S1, a switching tube S2, an input capacitor Cin, an output capacitor Cout, a bypass diode D1, an output resistor Rx, a control IC, and a driving circuit;
the PV + end of the photovoltaic module is connected with the output end OUT + through a switch tube S1 and a switch tube S2 which are sequentially connected in series; the PV-end (namely the grounding end) of the photovoltaic module is connected with the output end OUT-;
the input capacitor Cin is connected with the photovoltaic component in parallel, one end of the output capacitor Cout is connected with the output end OUT +, the other end of the output capacitor Cout is connected with the output end OUT-, and the output capacitor Cout, the bypass diode D1 and the output resistor Rx are connected in parallel;
the control IC, the switch tube S1 and the switch tube S2 are respectively connected with a drive circuit, and two signal ends of the control IC control the on-off of the switch tube S1 and the switch tube S2 through the drive circuit.
The switching tube S1 of the present embodiment is a MOS tube S1, and the switching tube S2 is a MOS tube S2; the PV + end of the photovoltaic module is connected with the drain electrode of an MOS tube S2, the source electrode of the MOS tube S2 is connected with the drain electrode of an MOS tube S1, and the source electrode of the MOS tube S1 is connected with an output end OUT +; the driving end Drv2 of the driving circuit is connected with the gate of the MOS tube S2, and the driving end Drv1 of the driving circuit is connected with the gate of the MOS tube S1; the common end of the MOS tube S2 connected with the MOS tube S1 is a reference end S2 GND.
The quick turn-off device of this embodiment is located between photovoltaic module and the dc-to-ac converter, adopts series connection's MOS pipe to carry out switching operation, has improved reliability and security greatly, can not cause high-pressure output because of single tube inefficacy when needs are shut off, and then high pressure causes the threat to fire fighter's life when having prevented the conflagration.
The quick turn-off device of the embodiment further comprises an auxiliary power supply, wherein the input of the auxiliary power supply is connected with the PV + of the photovoltaic module, the output of the auxiliary power supply is connected with the control IC and the driving circuit, and the auxiliary power supply is used for providing working voltage for the control IC and the driving circuit.
The driving circuit of the present embodiment has two configurations, as described below.
In a first structure, as shown in fig. 3, the driving circuit includes a first driving module and a second driving module;
the control IC, the first driving module and the second driving module are electrically connected in sequence, the driving end Drv2 of the second driving module is connected with the gate electrode of the MOS tube S2, and the driving end Drv1 of the second driving module is connected with the gate electrode of the MOS tube S1.
The first driving module comprises an optical coupler OP1, a voltage regulator tube D3, a resistor R0, a resistor R1 and a resistor R2;
the first signal end of the control IC is connected with an input pin 2 of an optical coupler OP1 through a resistor R2 on one hand and an output pin 4 of the optical coupler OP1 on the other hand, and the second signal end of the control IC is connected with an input pin 1 of the optical coupler OP1 through a resistor R1 on the one hand, is grounded through a voltage regulator tube D3 on the one hand and is connected with a power supply VCC through a resistor R0 on the other hand.
The second driving module comprises a switch tube Q1, a switch tube Q2, a switch tube Q3, a switch tube Q4, a voltage regulator tube D4, a voltage regulator tube D2 and a plurality of resistors;
the output pin 3 of the optical coupler OP1 is connected with the base of the switching tube Q1 through the resistor R3, connected with the base of the switching tube Q2 through the resistor R4 and grounded through the resistor R5;
the emitter of the switching tube Q1 is grounded, and the collector of the switching tube Q1 is connected with the gate of the switching tube Q3 on one hand and is connected with a power supply VCC through a resistor R6 on the other hand;
the emitter of the switching tube Q2 is grounded, and the collector of the switching tube Q2 is connected with the gate of the switching tube Q4 on one hand and is connected with a power supply VCC through a resistor R7 on the other hand;
the source electrode of the switch tube Q3 is grounded, and the drain electrode of the switch tube Q3 is connected with a power supply VDD through a resistor R8 on one hand and is connected with a driving end Drv1 through a resistor R10 on the other hand;
the source electrode of the switch tube Q4 is grounded, and the drain electrode of the switch tube Q4 is connected with a power supply VDD through a resistor R9 on one hand and is connected with a driving end Drv2 through a resistor R11 on the other hand;
the anode of the voltage-stabilizing tube D4 is connected with the output end OUT +, and the cathode of the voltage-stabilizing tube D4 is connected with the driving end Drv 1;
the anode of the voltage regulator tube D2 is connected with the reference end S2GND, and the cathode of the voltage regulator tube D2 is connected with the driving end Drv 2.
As shown in fig. 5, the control IC in this embodiment controls the operating state of the switching circuit through two pin terminals QD1 and QD 2. The drive circuit of the first structure of this embodiment is built by electronic components such as switch tube, opto-coupler, stabilivolt, resistance and forms, only needs these simple electronic components just can realize the safe drive of one way signal, and simple structure need not adopt special suspension power drive chip, and is with low costs, and the reliability is high.
The driving circuit with the first structure of the embodiment has two operation modes: the specific working flow of the on-mode and the off-mode is as follows.
An open mode: the first signal end of the control IC outputs low level (3.3V), a voltage regulator tube D3 connected to the second signal end of the control IC selects a 5V voltage regulator tube, a light emitting diode is arranged between two input pins of an optical coupler OP1, the light emitting diode is conducted due to the existence of pressure difference, so that the output end of the optical coupler OP1 is conducted, the output pin 3 and the output pin 4 of the optical coupler OP1 keep consistent output high level, at the moment, a switch tube Q1 and a switch tube Q2 are conducted, gate voltages of a switch tube Q3 and a switch tube Q4 are respectively pulled to 0V, the switch tube Q3 and the switch tube Q4 are closed, a power supply VDD is respectively connected to gate electrodes of a MOS tube S1 and a MOS tube S2 through resistors, the MOS tube S1 and the MOS tube S2 are in a connection state, and the quick turn-off device has an output and keeps working.
An off mode: the first signal end of the control IC outputs low voltage (0V), because the voltage of the input end 1 of the optical coupler OP1 is stabilized at 5V, the existence of the pressure difference enables the light emitting diode to be switched on, the output end of the optical coupler OP1 can be switched on, the output pin 3 and the output pin 4 of the optical coupler OP1 keep consistent output low level, the switch tube Q1 and the switch tube Q2 are switched off at the moment, the power VCC is respectively connected to the gate poles of the switch tube Q3 and the switch tube Q4 through resistors, the switch tube Q3 and the switch tube Q4 are switched on, the gate pole voltages of the MOS tube S1 and the MOS tube S2 are respectively pulled to 0V, the MOS tube S1 and the MOS tube S2 are in a closed state, the quick turn-off device has no output, and the work.
The problem that when the first signal end of the control IC is in short circuit with the adjacent second signal end, the control IC cannot be safely turned off can be effectively solved. When first signal end and adjacent second signal end short circuit, the voltage of two input pins of opto-coupler OP1 is the same, does not have the pressure differential, and the emitting diode between two input pins can not switch on, and the output of opto-coupler OP1 will be closed like this, no matter what state is output pin 4 of opto-coupler OP1, and output pin 3 all is 0V low level, and according to above-mentioned working mode analysis, quick turn-off device gets into the mode of closing, can realize safe shutoff.
In a second structure, as shown in fig. 4, the driving circuit includes a first driving module and a second driving module; in the second structure, the first driving module is the same as the first structure, and the second driving module is different from the first driving module.
The control IC, the first driving module and the second driving module are electrically connected in sequence, the driving end Drv2 of the second driving module is connected with the gate electrode of the MOS tube S2, and the driving end Drv1 of the second driving module is connected with the gate electrode of the MOS tube S1.
The first driving module comprises an optical coupler OP1, a voltage regulator tube D3, a resistor R0, a resistor R1 and a resistor R2;
the first signal end of the control IC is connected with an input pin 2 of an optical coupler OP1 through a resistor R2 on one hand and an output pin 4 of the optical coupler OP1 on the other hand, and the second signal end of the control IC is connected with an input pin 1 of the optical coupler OP1 through a resistor R1 on the one hand, is grounded through a voltage regulator tube D3 on the one hand and is connected with a power supply VCC through a resistor R0 on the other hand.
The second driving module comprises a switching tube Q1, a switching tube Q2, a switching tube Q3, a switching tube Q4, an optical coupler OP2, an optical coupler OP3, a diode D4, a diode D2 and a plurality of resistors;
the output pin 3 of the optical coupler OP1 is grounded through a resistor R5, connected with the input pin 1 of the optical coupler OP2 through a resistor R4 and connected with the input pin 1 of the optical coupler OP3 through a resistor R7;
an input pin 2 of the optocoupler OP2 is grounded through a resistor R3, an output pin 4 of the optocoupler OP2 is connected with an output end OUT +, an output pin 3 of the optocoupler OP2 is connected with a power supply VDD through a resistor R9 and a resistor R10 which are sequentially connected in series, a common end of the resistor R9 and the resistor R10 is connected with a base electrode of a switching tube Q1, an emitter electrode of the switching tube Q1 is connected with the power supply VDD, a collector electrode of the switching tube Q1 is connected with a base electrode of a switching tube Q3 through a resistor R13, a base electrode of the switching tube Q3 is connected with a collector electrode of a triode Q3 through a resistor R15 on one hand, and is connected with an emitter electrode of a triode Q3 through a diode D4 on the other hand, a collector electrode of the triode Q3 is connected with the output end;
an input pin 2 of the optical coupler OP3 is grounded through a resistor R6, an output pin 4 of the optical coupler OP3 is connected with a reference end S2GND, an output pin 3 of the optical coupler OP3 is connected with a power supply VDD through a resistor R11 and a resistor R12 which are sequentially connected in series, a common end, connected with the resistor R11 and the resistor R12, is connected with a base electrode of a switching tube Q2, an emitter electrode of the switching tube Q2 is connected with the power supply VDD, a collector electrode of the switching tube Q2 is connected with a base electrode of a switching tube Q4 through a resistor R14, a base electrode of a switching tube Q4 is connected with a collector electrode of a triode Q4 through a resistor R16 and is connected with an emitter electrode of a triode Q4 through a diode D2, a collector electrode of the triode Q4 is connected with the reference end S2GND, and an emitter.
The driving circuit of the second structure of this embodiment is also built by electronic components such as switch tube, opto-coupler, stabilivolt, resistance, also can realize the safe drive of one way signal, simple structure, and with low costs, the reliability is high. The switching tube Q1, the switching tube Q2, the switching tube Q3 and the switching tube Q4 are all PNP triodes.
The driving circuit with the second structure of the embodiment has two operation modes: the specific working flow of the on-mode and the off-mode is as follows.
An open mode: the first signal end of the control IC outputs high level (3.3V), because the voltage of an input pin 1 of an optical coupler OP1 is stabilized at 5V, the light emitting diode is conducted due to the existence of differential pressure, the output end of the optical coupler OP1 is conducted, an output pin 3 and an output pin 4 of the optical coupler OP1 keep consistent to output high level, the output ends of the optical coupler OP2 and the optical coupler OP3 are conducted, a resistor R11 is connected with a reference end S2GND, a resistor R9 is connected with an output end OUT +, the base and the emitter of a switching tube Q1 form an opening negative voltage, the base and the emitter of a switching tube Q2 form an opening negative voltage, the switching tube Q1 and the switching tube Q2 are conducted, a diode D4 and a diode D2 are conducted, the base and the emitter of the switching tube Q3 form a closing zero voltage, the base and the emitter of the switching tube Q4 form a closing zero voltage, the switching tube Q3 and the switching tube Q4, the driving voltage of a Drv1 is, the driving voltage of the driving end Drv2 is connected to the gate of the MOS transistor S2, the MOS transistor S1 and the MOS transistor S2 are in an on state, the quick turn-off device has an output, and the quick turn-off device keeps on mode operation.
An off mode: the first signal end of the control IC outputs low level (0V), because the voltage of an input pin 1 of an optical coupler OP1 is stabilized at 5V, the light emitting diode is switched on due to the existence of pressure difference, the output end of the optical coupler OP1 is switched on, an output pin 3 and an output pin 4 of the optical coupler OP1 keep consistent to output low level, the input ends of the optical coupler OP2 and the optical coupler OP3 are cut off, the output ends of the optical coupler OP2 and the optical coupler OP3 are cut off, a resistor R11 is disconnected with a reference end S2GND, a resistor R9 is disconnected with an output end OUT +, the base of a switching tube Q1 and an emitter form closing zero voltage, the base of the switching tube Q2 and the emitter form closing zero voltage, the switching tube Q1 and the switching tube Q2 are cut off, a diode D4 and a diode D2 are cut off, the base of the switching tube Q3 and the emitter form opening negative voltage, the base of the switching tube Q4 and the emitter form opening negative voltage, the gates of the MOS tube S1 and the MOS tube S2 are discharged, the MOS tube S1 and the MOS tube S2 are in a closed state, the quick turn-off device has no output, and the work in a turn-off mode is kept.
In summary, the fast turn-off device of the present embodiment has the advantages of good safety, high reliability and low cost. The embodiment aims at the special control IC only with one-way drive signal output, and a simple optocoupler is utilized to solve the problem that when the signal end of the control IC fails and is always output at a high level, the rapid turn-off device still can enter a turn-off mode, so that safe turn-off is realized. Meanwhile, the single-path signal is processed through safety protection, so that the two serially-connected MOS tubes can be driven by the single-path signal, the complexity of control software cannot be increased, the two MOS tubes are serially connected to serve as a turn-off switch, the reliability and the safety of a system can be effectively improved, high-voltage output cannot occur due to the fact that a single switch tube S1 or S2 is damaged, and personal safety hazards are avoided.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.
Claims (7)
1. A quick turn-off device capable of driving two series MOS tubes through a single-path signal is characterized by comprising a switch tube S1, a switch tube S2, a control IC and a driving circuit;
the PV + end of the photovoltaic module is connected with the output end OUT + through a switch tube S1 and a switch tube S2 which are sequentially connected in series; the PV-end of the photovoltaic module is connected with the output end OUT-;
the control IC, the switch tube S1 and the switch tube S2 are respectively connected with a drive circuit, and two signal ends of the control IC control the on-off of the switch tube S1 and the switch tube S2 through the drive circuit.
2. The fast turn-off device capable of driving two series MOS tubes by a single signal according to claim 1, further comprising an input capacitor Cin, an output capacitor Cout, a bypass diode D1 and an output resistor Rx;
the input capacitor Cin is connected with the photovoltaic component in parallel, one end of the output capacitor Cout is connected with the output end OUT +, the other end of the output capacitor Cout is connected with the output end OUT-, and the output capacitor Cout, the bypass diode D1 and the output resistor Rx are connected in parallel.
3. The fast turn-off device of claim 2, wherein the switch S1 is MOS transistor S1, the switch S2 is MOS transistor S2;
the PV + end of the photovoltaic module is connected with the drain electrode of an MOS tube S2, the source electrode of the MOS tube S2 is connected with the drain electrode of an MOS tube S1, and the source electrode of the MOS tube S1 is connected with an output end OUT +; the driving end Drv2 of the driving circuit is connected with the gate of the MOS tube S2, and the driving end Drv1 of the driving circuit is connected with the gate of the MOS tube S1;
the common end of the MOS tube S2 connected with the MOS tube S1 is a reference end S2 GND.
4. The device for rapidly turning off two series MOS tubes driven by a single signal according to claim 1 or 3, wherein the driving circuit comprises a first driving module and a second driving module;
the control IC, the first driving module and the second driving module are electrically connected in sequence, the driving end Drv2 of the second driving module is connected with the gate electrode of the MOS tube S2, and the driving end Drv1 of the second driving module is connected with the gate electrode of the MOS tube S1.
5. The fast turn-off device capable of driving two series MOS tubes through a single signal according to claim 4, wherein the first driving module comprises an optical coupler OP1, a voltage regulator tube D3, a resistor R0, a resistor R1 and a resistor R2;
the first signal end of the control IC is connected with an input pin 2 of an optical coupler OP1 through a resistor R2 on one hand and an output pin 4 of the optical coupler OP1 on the other hand, and the second signal end of the control IC is connected with an input pin 1 of the optical coupler OP1 through a resistor R1 on the one hand, is grounded through a voltage regulator tube D3 on the one hand and is connected with a power supply VCC through a resistor R0 on the other hand.
6. The device as claimed in claim 5, wherein the second driving module comprises a switch transistor Q1, a switch transistor Q2, a switch transistor Q3, a switch transistor Q4, a voltage regulator transistor D4, a voltage regulator transistor D2 and a plurality of resistors;
the output pin 3 of the optical coupler OP1 is connected with the base of the switching tube Q1 through the resistor R3, connected with the base of the switching tube Q2 through the resistor R4 and grounded through the resistor R5;
the emitter of the switching tube Q1 is grounded, and the collector of the switching tube Q1 is connected with the gate of the switching tube Q3 on one hand and is connected with a power supply VCC through a resistor R6 on the other hand;
the emitter of the switching tube Q2 is grounded, and the collector of the switching tube Q2 is connected with the gate of the switching tube Q4 on one hand and is connected with a power supply VCC through a resistor R7 on the other hand;
the source electrode of the switch tube Q3 is grounded, and the drain electrode of the switch tube Q3 is connected with a power supply VDD through a resistor R8 on one hand and is connected with a driving end Drv1 through a resistor R10 on the other hand;
the source electrode of the switch tube Q4 is grounded, and the drain electrode of the switch tube Q4 is connected with a power supply VDD through a resistor R9 on one hand and is connected with a driving end Drv2 through a resistor R11 on the other hand;
the anode of the voltage-stabilizing tube D4 is connected with the output end OUT +, and the cathode of the voltage-stabilizing tube D4 is connected with the driving end Drv 1;
the anode of the voltage regulator tube D2 is connected with the reference end S2GND, and the cathode of the voltage regulator tube D2 is connected with the driving end Drv 2.
7. The fast turn-off device capable of driving two MOS tubes connected in series through a single signal as claimed in claim 5, wherein the second driving module comprises a switch tube Q1, a switch tube Q2, a switch tube Q3, a switch tube Q4, an optical coupler OP2, an optical coupler OP3, a diode D4, a diode D2 and a plurality of resistors;
the output pin 3 of the optical coupler OP1 is grounded through a resistor R5, connected with the input pin 1 of the optical coupler OP2 through a resistor R4 and connected with the input pin 1 of the optical coupler OP3 through a resistor R7;
an input pin 2 of the optocoupler OP2 is grounded through a resistor R3, an output pin 4 of the optocoupler OP2 is connected with an output end OUT +, an output pin 3 of the optocoupler OP2 is connected with a power supply VDD through a resistor R9 and a resistor R10 which are sequentially connected in series, a common end of the resistor R9 and the resistor R10 is connected with a base electrode of a switching tube Q1, an emitter electrode of the switching tube Q1 is connected with the power supply VDD, a collector electrode of the switching tube Q1 is connected with a base electrode of a switching tube Q3 through a resistor R13, a base electrode of the switching tube Q3 is connected with a collector electrode of a triode Q3 through a resistor R15 on one hand, and is connected with an emitter electrode of a triode Q3 through a diode D4 on the other hand, a collector electrode of the triode Q3 is connected with the output end;
an input pin 2 of the optical coupler OP3 is grounded through a resistor R6, an output pin 4 of the optical coupler OP3 is connected with a reference end S2GND, an output pin 3 of the optical coupler OP3 is connected with a power supply VDD through a resistor R11 and a resistor R12 which are sequentially connected in series, a common end, connected with the resistor R11 and the resistor R12, is connected with a base electrode of a switching tube Q2, an emitter electrode of the switching tube Q2 is connected with the power supply VDD, a collector electrode of the switching tube Q2 is connected with a base electrode of a switching tube Q4 through a resistor R14, a base electrode of a switching tube Q4 is connected with a collector electrode of a triode Q4 through a resistor R16 and is connected with an emitter electrode of a triode Q4 through a diode D2, a collector electrode of the triode Q4 is connected with the reference end S2GND, and an emitter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911217858.2A CN110784202A (en) | 2019-12-03 | 2019-12-03 | Quick turn-off device capable of driving two series MOS (metal oxide semiconductor) tubes through single-path signal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911217858.2A CN110784202A (en) | 2019-12-03 | 2019-12-03 | Quick turn-off device capable of driving two series MOS (metal oxide semiconductor) tubes through single-path signal |
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| CN110784202A true CN110784202A (en) | 2020-02-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911217858.2A Pending CN110784202A (en) | 2019-12-03 | 2019-12-03 | Quick turn-off device capable of driving two series MOS (metal oxide semiconductor) tubes through single-path signal |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022116389A1 (en) * | 2020-12-01 | 2022-06-09 | 浙江英达威芯电子有限公司 | Photovoltaic module turn-off circuit and photovoltaic device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005102438A (en) * | 2003-09-26 | 2005-04-14 | Toyota Industries Corp | Dc-dc converter |
| CN106208884A (en) * | 2016-08-31 | 2016-12-07 | 南京康尼电子科技有限公司 | A kind of torque security turning off system for servo-driver and method |
| CN108666977A (en) * | 2018-06-29 | 2018-10-16 | 江苏集能易新能源技术有限公司 | A kind of photovoltaic switching off device tandem drive circuit |
| CN210469257U (en) * | 2019-12-03 | 2020-05-05 | 浙江佳明天和缘光伏科技有限公司 | Quick turn-off device capable of driving two series MOS (metal oxide semiconductor) tubes through single-path signal |
-
2019
- 2019-12-03 CN CN201911217858.2A patent/CN110784202A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005102438A (en) * | 2003-09-26 | 2005-04-14 | Toyota Industries Corp | Dc-dc converter |
| CN106208884A (en) * | 2016-08-31 | 2016-12-07 | 南京康尼电子科技有限公司 | A kind of torque security turning off system for servo-driver and method |
| CN108666977A (en) * | 2018-06-29 | 2018-10-16 | 江苏集能易新能源技术有限公司 | A kind of photovoltaic switching off device tandem drive circuit |
| CN210469257U (en) * | 2019-12-03 | 2020-05-05 | 浙江佳明天和缘光伏科技有限公司 | Quick turn-off device capable of driving two series MOS (metal oxide semiconductor) tubes through single-path signal |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022116389A1 (en) * | 2020-12-01 | 2022-06-09 | 浙江英达威芯电子有限公司 | Photovoltaic module turn-off circuit and photovoltaic device |
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