CN210780593U - Monitoring protection circuit of modularization single-phase inverter - Google Patents
Monitoring protection circuit of modularization single-phase inverter Download PDFInfo
- Publication number
- CN210780593U CN210780593U CN201921657935.1U CN201921657935U CN210780593U CN 210780593 U CN210780593 U CN 210780593U CN 201921657935 U CN201921657935 U CN 201921657935U CN 210780593 U CN210780593 U CN 210780593U
- Authority
- CN
- China
- Prior art keywords
- circuit
- protection
- monitoring
- module
- inverter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000012544 monitoring process Methods 0.000 title claims abstract description 80
- 238000001514 detection method Methods 0.000 claims abstract description 13
- 238000006243 chemical reaction Methods 0.000 claims description 5
- 230000008878 coupling Effects 0.000 claims description 4
- 238000010168 coupling process Methods 0.000 claims description 4
- 238000005859 coupling reaction Methods 0.000 claims description 4
- 238000002955 isolation Methods 0.000 claims description 4
- 230000003287 optical effect Effects 0.000 claims description 4
- 230000005059 dormancy Effects 0.000 abstract description 2
- 239000003990 capacitor Substances 0.000 description 38
- 238000010586 diagram Methods 0.000 description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Images
Landscapes
- Inverter Devices (AREA)
Abstract
The utility model provides a monitoring protection circuit of modularization single inverter, the monitoring protection circuit of modularization single inverter is applied to modularization single inverter, the monitoring protection circuit of modularization single inverter includes: the control module comprises a control chip U2, and is connected with the protection module and used for realizing the overall control; the protection module, the front end of protection module has inverter circuit for protection module input power, the rear end of protection module has control chip U2, is used for transmitting monitoring information to control chip U2, the protection module includes low voltage protection monitoring circuit, overvoltage protection monitoring circuit, overcurrent protection circuit and no-load detection circuit, is used for monitoring voltage, electric current and no-load protection. The utility model discloses a control module links to each other with protection module, has realized functions such as excessive pressure, low pressure, overload, short-circuit protection to can get into dormancy low-power consumption state under no-load condition.
Description
Technical Field
The utility model relates to an inverter technical field, concretely relates to monitoring protection circuit of modularization single inverter.
Background
With the economic development of China, the living standard of people is greatly improved, the manufacturing technology of power switching devices is mature day by day, the electronic technology is rapidly developed, the inverter technology is widely applied to the aspects of industrial production, daily life and the like as the core of the electronic technology, but at present, the conventional inverter power supply has a complex control scheme, a large volume and no monitoring protection, and the energy efficiency, the safety reliability and the operability of the inverter concern the safe operation and the economic benefit of a system, so that the research on a modularized single inverter with high reliability and monitoring protection is particularly important.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model discloses a technical scheme is: a monitoring protection circuit of a modular single-phase inverter is applied to the modular single-phase inverter and comprises a control module and a protection module;
the control module comprises a control chip U2, the model of the control chip is TDS1093, and the control module is connected with the monitoring protection circuit of the modular single inverter and used for realizing the overall control of the monitoring protection circuit of the modular single inverter;
the control chip U2 is connected with buzzer B1 for alarming, the one end of buzzer B1 is connected with direct current 5V voltage and the negative pole of diode D1, the other end of buzzer B1 is connected with the positive pole of diode D1 and the collector of triode Q2, the emitter of triode Q2 is connected with pin 14 and ground connection of control chip U2, the base of triode Q2 is connected with one end of resistor R10, the other end of resistor R10 is connected with the BEL pin of control chip U2, resistor R10 is the base resistor of triode Q2 and is used for limiting base current, triode Q1 plays the role of switch tube and is used for controlling buzzer B1.
The protection module, the front end of protection module has inverter circuit for protection module input power, the rear end of protection module has control chip U2, is used for transmitting monitoring information to control chip U2, the protection module includes low voltage protection monitoring circuit, overvoltage protection monitoring circuit, overcurrent protection circuit and no-load detection circuit, is used for monitoring voltage, electric current and no-load protection.
The low-voltage protection monitoring circuit comprises a photoelectric coupler U12, wherein the photoelectric coupler U12 is connected with a FAULT pin of a control chip U2 and used for isolating and transmitting a direct-current low-voltage signal to the control module;
the overvoltage protection monitoring circuit comprises an operational amplifier U11, the overvoltage protection monitoring circuit is connected with a control chip, wherein an operational amplifier U11D and an operational amplifier U11C in the operational amplifier U11 form a comparator, and a protection signal is formed by comparing a voltage reference threshold value and a monitoring voltage and is transmitted to a control module;
the overcurrent protection circuit is connected with the inverter circuit and the control chip, the overcurrent protection circuit comprises a rectifier bridge DB3 and an operational amplifier U11A, the rectifier bridge DB3 is used for outputting a direct current level, the operational amplifier U11A is used as a comparator, and a protection signal is formed by comparing an overcurrent protection threshold value with the direct current level output by the rectifier bridge DB3 and is transmitted to the control module;
the no-load detection circuit is connected with the control module and the inverter circuit, and comprises an operational amplifier U11B for comparing a direct current level signal output by the overcurrent protection circuit with a no-load threshold value to form a no-load indication signal which is transmitted to the control module through optical coupling isolation.
The front end of the inverter circuit is connected with a booster circuit for outputting direct current high voltage to the inverter circuit, the rear end of the inverter circuit is connected with a rectifying circuit, the rectifying circuit is connected with a control chip and used for providing direct current voltage for the control chip, the booster circuit, the inverter circuit and the rectifying circuit form a power module, and the power module is connected with the control module and a protection module and used for supplying power to a monitoring protection circuit of the modular single inverter;
the boost circuit comprises a plurality of VICOR modules which are connected in parallel, wherein a pin 1 of each VICOR module is connected with the positive electrode of a direct-current power supply, a pin 4 of each VICOR module is connected with the negative electrode of the direct-current power supply, and the connecting structures of the VICOR modules are basically the same and are used for outputting direct-current high voltage;
the inverter circuit comprises an MOS tube Q4, an MOS tube Q5, an MOS tube Q6 and an MOS tube Q7, wherein the MOS tube Q4, the MOS tube Q5, the MOS tube Q6 and the MOS tube Q7 are connected in series to form a single full-bridge inverter circuit for completing the conversion from direct current to alternating current;
the input end of the rectifying circuit is connected with the output end of the inverter circuit and used for converting alternating current into direct current, and the rectifying circuit is connected with a VAC pin of the control chip U2 and used for providing direct current voltage for the control chip.
The front end of the inverter circuit is further connected with a first driving circuit and a second driving circuit, the rear end of the inverter circuit is further connected with a third driving circuit and a fourth driving circuit, the first driving circuit, the second driving circuit, the third driving circuit and the fourth driving circuit form a driving module, the driving module is connected with a control module and the inverter circuit, the output end of the first driving circuit is connected with the grid and the source of the MOS tube Q4, the output end of the second driving circuit is connected with the grid and the source of the MOS tube Q5, the output end of the third driving circuit is connected with the grid and the source of the MOS tube Q6, and the output end of the fourth driving circuit is connected with the grid and the source of the MOS tube Q7 and is used for conducting sine pulse width modulation on the inverter circuit; the driving module further comprises an adjusting circuit used for completing timing sequence adjustment.
The utility model has the advantages and positive effects that:
(1) the utility model discloses a series connection of a plurality of VICOR modules has realized the conversion of direct current low voltage circuit to direct current high voltage circuit, and every VICOR module has connect operational amplifier U14, resistance R19 and electric capacity C2, operational amplifier U14, resistance R19 and electric capacity C2 form feedback circuit, can realize adjusting single module.
(2) The utility model discloses a control module links to each other with protection module, has realized functions such as excessive pressure, low pressure, overload, short-circuit protection to can get into dormancy low-power consumption state under no-load condition.
(3) The utility model discloses a protection module, protection module include low pressure protection monitoring circuit, overvoltage protection monitoring circuit, overcurrent protection circuit and no-load detection circuitry for with the voltage, the electric current of monitoring and convey to control module and protection circuit.
Drawings
Fig. 1 is a schematic circuit diagram of a monitoring protection circuit of a modular single-phase inverter according to the present invention;
fig. 2 is a schematic diagram of a control chip of a monitoring protection circuit of a modular single-phase inverter according to the present invention;
fig. 3 is a schematic circuit diagram of a boost circuit of the monitoring protection circuit of the modular single inverter of the present invention;
fig. 4 is a schematic circuit diagram of an inverter circuit of the monitoring protection circuit of the modular single inverter of the present invention;
fig. 5 is a schematic circuit diagram of a rectifier circuit of the monitoring protection circuit of the modular single inverter of the present invention;
fig. 6 is a schematic circuit diagram of an adjusting circuit of the monitoring protection circuit of the modular single inverter according to the present invention;
fig. 7 is a schematic circuit diagram of a driving module of a monitoring protection circuit of a modular single inverter according to the present invention;
fig. 8 is a schematic circuit diagram of a low-voltage protection monitoring circuit of a monitoring protection circuit of a modular single-phase inverter according to the present invention;
fig. 9 is a schematic circuit diagram of an overvoltage protection monitoring circuit of a monitoring protection circuit of a modular single inverter according to the present invention;
fig. 10 is a schematic circuit diagram of an overcurrent protection circuit of a monitoring protection circuit of a modular single-phase inverter according to the present invention;
fig. 11 is a schematic circuit diagram of an idle detection circuit of the monitoring protection circuit of the modular single inverter of the present invention;
Detailed Description
As shown in fig. 1 to 11, the utility model provides a monitoring protection circuit of a modular single inverter, which comprises a control module, wherein the control module comprises a control chip U2, the model of the control chip is TDS1093, and the control module is connected with the monitoring protection circuit of the modular single inverter and is used for realizing the overall control of the monitoring protection circuit of the modular single inverter;
the control chip U2 is connected with buzzer B1 for alarming, the one end of buzzer B1 is connected with direct current 5V voltage and the negative pole of diode D1, the other end of buzzer B1 is connected with the positive pole of diode D1 and the collector of triode Q2, the emitter of triode Q2 is connected with pin 14 and ground connection of control chip U2, the base of triode Q2 is connected with one end of resistor R10, the other end of resistor R10 is connected with the BEL pin of control chip U2, resistor R10 is the base resistor of triode Q2 and is used for limiting base current, triode Q1 plays the role of switch tube and is used for controlling buzzer B1.
The protection module, the front end of protection module has inverter circuit for protection module input power, the rear end of protection module has control chip U2, is used for transmitting monitoring information to control chip U2, the protection module includes low voltage protection monitoring circuit, overvoltage protection monitoring circuit, overcurrent protection circuit and no-load detection circuit, is used for monitoring voltage, electric current and no-load protection.
The low-voltage protection monitoring circuit comprises a photoelectric coupler U12, wherein a port 1 of the photoelectric coupler U12 is connected with one end of a resistor R42, a port 2 of the photoelectric coupler U12 is connected with one end of a resistor R41, the common end of a bicolor light-emitting diode LED1 and one end of a diode D19, a port 3 of the photoelectric coupler U12 is grounded, and a port 4 of the photoelectric coupler U12 is connected with a FAULT pin of a control chip U2 and used for isolating and transmitting a direct-current low-voltage signal to a control module;
the overvoltage protection monitoring circuit comprises an operational amplifier U11, a pin 8 of the operational amplifier U11 is connected with the cathode of a green light emitting diode of a bicolor light emitting diode LED1, a pin 9 of the operational amplifier U11 is connected with one end of a capacitor C29, one end of a resistor R43 and one end of a resistor R44, the other end of the resistor R44 is connected with a direct current level signal output by the overcurrent protection circuit, a pin 10 of the operational amplifier U11 is connected with one end of a pin 13, one end of a capacitor C28 and one end of a resistor R39, the other end of a capacitor C28 is connected with the other end of an electrical resistor C29, the other end of a resistor R43, one end of a resistor R38 and ground, a pin 12 of the operational amplifier U11 is connected with one end of a resistor R37, the other end of a resistor R38 and one end of a resistor R40, the other end of the resistor R9 is connected with the other end of a resistor R44, a pin 14 of the operational amplifier U11 is connected with the cathode of, the anode of the diode D17 is connected to the other end of the resistor R40, wherein a pin 12, a pin 13 and a pin 14 in the operational amplifier U11 are three pins of an operational amplifier U11D, a pin 8, a pin 9 and a pin 10 in the operational amplifier U11 are three pins of an operational amplifier U11C, the operational amplifier U11D and the operational amplifier U11C form a comparator, and a protection signal is formed by comparing a voltage reference threshold with a monitoring voltage and transmitted to the control module;
the over-current protection circuit is connected with an inverter circuit and a control chip, the over-current protection circuit comprises a rectifier bridge DB3, a pin 1 of the rectifier bridge DB3 is connected with one end of a resistor R49 and the other end of an inductor L2, a pin 2 of a rectifier bridge DB3 is connected with one end of an inductor L2 and the other end of a resistor R49, a pin 3 of the rectifier bridge DB3 is connected with one end of a resistor R50, the other end of the resistor R50 is connected with the anode of a pole capacitor C31, a pin 2 of an operational amplifier U11 and the anode of a diode D18, a pin 4 of the rectifier bridge DB3 is connected with the cathode of the pole capacitor C31 and the ground, the rectifier bridge DB3 is used for outputting a direct-current level, a pin 1 of the operational amplifier U11 is connected with the cathode of a diode D18 and the cathode of a diode D19, a pin 3 of the operational amplifier U9 is connected with one end of a resistor R51, one end of a resistor R52 and one end of a capacitor C32, pin 4 of an operational amplifier U11 is connected with a direct current 3V voltage, the positive electrode of a polar capacitor C34 and one end of a capacitor C33, the negative electrode of the polar capacitor C34 is connected with the other end of a capacitor C33, the other end of a capacitor C32, the other end of a resistor R52 and the ground, pin 11 of the operational amplifier U11 is grounded, pin 1, pin 2, pin 3, pin 4 and pin 11 in the operational amplifier U11 are five pins of an operational amplifier U11A, the operational amplifier U11A is used as a comparator, and a protection signal is formed by comparing an overcurrent protection threshold value with a direct current level output by a rectifier bridge DB3 and is transmitted to a control module;
the no-load detection circuit comprises a rectifier bridge DB2, a pin 1 of the rectifier bridge DB2 is connected with the other end of an inductor L2 and one end of a resistor R45, a pin 2 of the rectifier bridge DB2 is connected with the other end of a resistor R45 and one end of an inductor L2, a pin 3 of the rectifier bridge DB2 is connected with the negative electrode of a switching diode D21 and one end of a resistor R46, a pin 4 of the rectifier bridge DB2 is connected with one end of a positive electrode capacitor C30 of the switching diode D21 and outputs a direct current low voltage level, the other end of a resistor R46 is connected with the other end of a capacitor C30 and a pin 5 of an operational amplifier U11, a pin 6 of an operational amplifier U11 is connected with one end of a resistor R47, one end of a resistor R48 and one end of a capacitor C42, the other end of a resistor R48 is connected with the other end of a capacitor C42 and ground, the other end of the R42 is connected with a direct current level signal output by an overcurrent protection circuit, and a photoelectric coupler U42 of the operational, a pin 5, a pin 6 and a pin 7 in the operational amplifier U11 are three pins of an operational amplifier U11B, the operational amplifier U11B is configured to compare a dc level signal output by the overcurrent protection circuit with an idle threshold and form an idle indication signal, a port 1 of the photocoupler U13 is connected to one end of a resistor R67, the other end of the resistor R67 is connected to one end of a resistor R66 and a dc 12V voltage, a port 3 of the photocoupler U13 is grounded, a port 4 of the photocoupler U13 is connected to a TMP pin of the control chip U2, and the photocoupler U13 is configured to transmit the idle indication signal to the control chip U2 through optical coupling isolation.
The front end of the inverter circuit is connected with a booster circuit for outputting direct current high voltage to the inverter circuit, the rear end of the inverter circuit is connected with a rectifying circuit, the rectifying circuit is connected with a control chip and used for providing direct current voltage for the control chip, the booster circuit, the inverter circuit and the rectifying circuit form a power module, and the power module is connected with the control module and a protection module and used for supplying power to a monitoring protection circuit of the modular single inverter;
in the embodiment, the boost circuit comprises 10 VICOR modules which are connected in parallel, wherein a pin 1 of each VICOR module is connected with the anode of a direct current power supply, a pin 4 of each VICOR module is connected with the cathode of the direct current power supply, and the connection structures of the VICOR modules are basically the same, wherein a pin 5 of the VICOR module U1 is connected with a pin 6, an emitter of a triode Q1, the anode of a zener diode D2 and one end of a resistor R30, a pin 7 of the VICOR module U1 is connected with a collector of a triode Q1, a base of the triode Q1 is connected with the cathode of the zener diode D2 and one end of the resistor R11, the other end of the resistor R11 is connected with one end of a capacitor C2 and the output end of an operational amplifier U14, the positive input end of the operational amplifier U14 is connected with one end of a resistor R19 and one end of a resistor R23, the other end of the resistor R19 is connected with the other end of the capacitor C2, the other end of the resistor R23 is connected with one end of the resistor R29 and the other end of the resistor R30, the negative input end of the operational amplifier U14 is connected with one end of the resistor R20, the operational amplifier U14, the resistor R19 and the capacitor C2 form a feedback circuit for adjusting a single module, the other end of the resistor R20 is connected with one end of the resistor R21 and one end of the resistor R22, the other end of the resistor R22 outputs a direct-current high-voltage negative electrode, a pin 8 of the VICOR module U1 is connected with a pin 9, the other end of the resistor R21, the other end of the resistor R29 and an output high-voltage positive electrode and is used;
a pin 5 of the VICOR module U9 is connected to a pin 6, an emitter of the transistor Q3, a positive electrode of the zener diode D3 and one end of the resistor R59, a pin 7 of the VICOR module U9 is connected to a collector of the transistor Q3, a base of the transistor Q3 is connected to a negative electrode of the zener diode D3 and one end of the resistor R6, the other end of the resistor R6 is connected to one end of the capacitor C12 and an output end of the operational amplifier U15, a positive input end of the operational amplifier U15 is connected to one end of the resistor R18 and one end of the resistor R58, the other end of the resistor R18 is connected to the other end of the capacitor C18, the other end of the resistor R18 is connected to one end of the resistor R18 and the other end of the resistor R18, a negative input end of the operational amplifier U18 is connected to one end of the resistor R18, the operational amplifier U18, the resistor R18 and the one end of the capacitor C18 form a feedback, the other end of the resistor R57 is connected with a pin 5 and a pin 6 of the VICOR module U10 and a cathode for outputting direct current high voltage, and a pin 8 of the VICOR module U9 is connected with a pin 9, the other end of the resistor R56, the other end of the resistor R28 and an anode for outputting direct current high voltage; pin 7 of VICOR module U10 outputs a reference voltage;
the inverter circuit comprises a MOS tube Q4, the drain of the MOS tube Q4 is connected with the drain of a MOS tube Q6 and one end of a fuse F1, the source of the MOS tube Q4 is connected with the drain of a MOS tube Q5 and one end of an inductor L2, the gate of the MOS tube Q4 is connected with one end of a resistor R31 and the anode of a diode D6, the other end of the resistor R6 is connected with the cathode of the diode D6, the source of the MOS tube Q6 is connected with the direct current high voltage output end of the booster circuit and the source of the MOS tube Q6, the gate of the MOS tube Q6 is connected with one end of the resistor R6 and the anode of the diode D6, the other end of the resistor R6 is connected with the cathode of the diode D6, the drain of the MOS tube Q6 is connected with one end of the inductor L6 and the source of the MOS tube Q6, the gate of the MOS tube Q6 is connected with the anode of the diode D6 and the cathode of the diode D6, and the anode of the diode D6 are connected with the gate of the diode D6, the MOS tube Q4, the MOS tube Q5, the MOS tube Q6 and the MOS tube Q7 form a single full bridge inverter circuit for completing conversion from direct current to alternating current, the other end of the resistor R53 is connected with the cathode of the diode D10, the other end of the inductor L1 is connected with the port 4 of the iron core inductor L5, the other end of the inductor L2 is connected with the port 1 of the iron core inductor L5, the port 2 of the iron core inductor L5 is connected with one end of the capacitor C6 and one end of the inductor L3, the port 3 of the iron core inductor L5 is connected with the other end of the capacitor C6 and one end of the inductor L4, the other end of the inductor L3 is connected with the other end of the inductor L4, and the inductor L3 and the capacitor C6 form a filter circuit for filtering harmonic components to form single alternating current;
the rectifying circuit comprises a rectifying bridge DB1, wherein a pin 1 of the rectifying bridge DB1 is connected with one end of an inductor L4, a pin 2 of the rectifying bridge DB1 is connected with the other end of the inductor L4, two ends of the inductor L4 are connected with high-voltage alternating current output by an inverter circuit, a pin 3 of the rectifying bridge DB1 is connected with one end of a resistor R65, the positive electrode of a polar capacitor C49 and one end of a resistor R64, a pin 4 of the rectifying bridge DB1 is connected with the other end of a resistor R65, the negative electrode of the polar capacitor C49, one end of a resistor R68 and the ground, the rectifying bridge DB1 is used for converting the alternating current into the direct current, and the other end of the resistor R64 is connected with the other end of a resistor R68 and a VAC pin of a control chip U2 and used for providing;
the front end of the inverter circuit is also connected with a first drive circuit and a second drive circuit, the rear end of the inverter circuit is also connected with a third drive circuit and a fourth drive circuit, the first drive circuit, the second drive circuit, the third drive circuit and the fourth drive circuit form a drive module, and the drive module is connected with a control module and the inverter circuit and is used for carrying out sine pulse width modulation on the inverter circuit; the driving module also comprises an adjusting circuit used for completing the time sequence adjustment;
the adjusting circuit comprises an inverter U3, a port 1 of the inverter U3 is connected with an SPWM _ P pin of a control chip U2 and one end of a resistor R12, the other end of the resistor R12 is grounded, a port 2 of the inverter U3 is connected with a port 3, one end of a resistor R14 and a port 1 of a logic AND gate U4, the other end of the resistor R14 is connected with one end of a capacitor C8 and a port 2 of a logic AND gate U4, the other end of the capacitor C8 is grounded, a port 4 of the inverter U3 is connected with one end of a resistor R15 and a port 5 of a logic AND gate U4, the other end of the resistor R15 is connected with one end of a capacitor C9 and a port 6 of a logic AND gate U4, the other end of a resistor R9 is grounded, a port 13 of the inverter U3 is connected with one end of a resistor R13 and a SPWM _ N pin of a control chip U2, the other end of the resistor R2 is grounded, a port 12 of the inverter U2 is connected with a, the other end of the resistor R16 is connected with one end of a capacitor C10 and a port 9 of a logic AND gate U4, the other end of the capacitor C10 is grounded, a port 10 of the inverter U3 is connected with one end of a resistor R17 and a port 12 of a logic AND gate U4, the other end of the resistor R17 is connected with one end of the capacitor C11 and a port 13 of a logic AND gate U4, the other end of the resistor R11 is grounded, and the inverter U3 and the logic AND gate U4 play a role in timing adjustment; a port 4 of the logic and gate U4 is connected with an input end of a first driving circuit, a port 10 of the logic and gate U4 is connected with an input end of a fourth driving circuit, and a port 11 of the logic and gate U4 is connected with an input end of a third driving circuit;
the first driving circuit, the second driving circuit, the third driving circuit and the fourth driving circuit have the same connection structure, wherein the first driving circuit comprises a photoelectric coupler U5, a pin 1 of the photoelectric coupler U5 is connected with a pin 2 and one end of a resistor R25, the other end of the resistor R25 is connected with a port 4 of a logic AND gate U4, a pin 3 of the photoelectric coupler U5 is connected with a pin 4 and ground, a pin 5 of the photoelectric coupler U5 is connected with one end of a capacitor C17, one end of the capacitor C18, the anode of a switching diode D4 and ground, a pin 6 of the photoelectric coupler U5 is connected with a pin 7 and the other end of a resistor R31, a pin 8 of the photoelectric coupler U5 is connected with the other end of a capacitor C17, one end of a resistor R24 and a direct current 12V voltage, the other end of the resistor R24 is connected with the other end of a capacitor C18, the cathode of the switching diode D4 and the source of an MOS tube Q4, the optocoupler U5 acts as a switching circuit for isolating the transfer and controlling the switching diode D9.
The working principle of the utility model is as follows: the control module comprises a control chip U2, the model of the control chip is TDS1093, and the control module is connected with the monitoring protection circuit of the modular single inverter and used for realizing the overall control of the monitoring protection circuit of the modular single inverter;
the protection module, the front end of protection module has inverter circuit for protection module input power, the rear end of protection module has control chip U2, is used for transmitting monitoring information to control chip U2, the protection module includes low voltage protection monitoring circuit, overvoltage protection monitoring circuit, overcurrent protection circuit and no-load detection circuit, is used for monitoring voltage, electric current and no-load protection.
The low-voltage protection monitoring circuit comprises a photoelectric coupler U12, wherein the photoelectric coupler U12 is connected with a FAULT pin of a control chip U2 and used for isolating and transmitting a direct-current low-voltage signal to the control module;
the overvoltage protection monitoring circuit comprises an operational amplifier U11, the overvoltage protection monitoring circuit is connected with a control chip, wherein an operational amplifier U11D and an operational amplifier U11C in the operational amplifier U11 form a comparator, and a protection signal is formed by comparing a voltage reference threshold value and a monitoring voltage and is transmitted to a control module;
the overcurrent protection circuit is connected with the inverter circuit and the control chip, the overcurrent protection circuit comprises a rectifier bridge DB3 and an operational amplifier U11A, the rectifier bridge DB3 is used for outputting a direct current level, the operational amplifier U11A is used as a comparator, and a protection signal is formed by comparing an overcurrent protection threshold value with the direct current level output by the rectifier bridge DB3 and is transmitted to the control module;
the no-load detection circuit is connected with the control module and the inverter circuit, and comprises an operational amplifier U11B for comparing a direct current level signal output by the overcurrent protection circuit with a no-load threshold value to form a no-load indication signal which is transmitted to the control module through optical coupling isolation.
The front end of the inverter circuit is connected with a booster circuit for outputting direct current high voltage to the inverter circuit, the rear end of the inverter circuit is connected with a rectifying circuit, the rectifying circuit is connected with a control chip and used for providing direct current voltage for the control chip, the booster circuit, the inverter circuit and the rectifying circuit form a power module, and the power module is connected with the control module and a protection module and used for supplying power to a monitoring protection circuit of the modular single inverter;
the front end of the inverter circuit is also connected with a first drive circuit and a second drive circuit, the rear end of the inverter circuit is also connected with a third drive circuit and a fourth drive circuit, the first drive circuit, the second drive circuit, the third drive circuit and the fourth drive circuit form a drive module, and the drive module is connected with a control module and the inverter circuit and is used for carrying out sine pulse width modulation on the inverter circuit; the driving module further comprises an adjusting circuit used for completing timing sequence adjustment.
The utility model is characterized in that: the conversion from a direct-current low-voltage circuit to a direct-current high-voltage circuit is realized by connecting a plurality of VICOR modules in series, each VICOR module is connected with an operational amplifier U14, a resistor R19 and a capacitor C2, the operational amplifier U14, the resistor R19 and the capacitor C2 form a feedback circuit, and the adjustment of a single module can be realized; the control module is connected with the protection module, so that the functions of overvoltage, low voltage, overload, short-circuit protection and the like are realized, and the control module can enter a dormant low-power-consumption state under the no-load condition; the protection module comprises a low-voltage protection monitoring circuit, an overvoltage protection monitoring circuit, an overcurrent protection circuit and a no-load detection circuit, and is used for transmitting the monitored voltage and current to the control module and the protection circuit.
The embodiments of the present invention have been described in detail, but the description is only for the preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made within the scope of the present invention should be covered by the present patent.
Claims (6)
1. The monitoring protection circuit of the modular single-phase inverter is applied to the modular single-phase inverter and comprises a control module and a protection module;
the control module comprises a control chip U2, is connected with the monitoring protection circuit of the modular single-phase inverter and is used for realizing the overall control of the monitoring protection circuit of the modular single-phase inverter;
the protection module, the front end of protection module has inverter circuit for protection module input power, the rear end of protection module has control chip U2, is used for transmitting monitoring information to control chip U2, the protection module includes low voltage protection monitoring circuit, overvoltage protection monitoring circuit, overcurrent protection circuit and no-load detection circuit, is used for monitoring voltage, electric current and no-load protection.
2. The monitoring protection circuit of the modular single-phase inverter as claimed in claim 1, wherein the low voltage protection monitoring circuit comprises an opto-coupler U12, the opto-coupler U12 is connected to a FAULT pin of a control chip U2 and is used for transmitting a direct current low voltage signal to the control module in an isolated manner.
3. The monitoring protection circuit of the modular single-phase inverter of claim 1, wherein the overvoltage protection monitoring circuit comprises an operational amplifier U11, the overvoltage protection monitoring circuit is connected with a control chip, wherein an operational amplifier U11D and an operational amplifier U11C in the operational amplifier U11 form a comparator, and a protection signal is formed by comparing a voltage reference threshold value and a monitoring voltage and transmitted to the control module.
4. The monitoring protection circuit of the modular single inverter of claim 1, wherein the overcurrent protection circuit is connected with the inverter circuit and the control chip, the overcurrent protection circuit comprises a rectifier bridge DB3 and an operational amplifier U11A, the rectifier bridge DB3 is used for outputting a direct current level, the operational amplifier U11A is used as a comparator, and a protection signal is formed and transmitted to the control module by comparing an overcurrent protection threshold value with the direct current level output by the rectifier bridge DB 3.
5. The monitoring protection circuit of the modular single-phase inverter as claimed in claim 4, wherein the no-load detection circuit is connected to the inverter circuit and the control module, and the no-load detection circuit includes an operational amplifier U11B for comparing a dc level signal output by the over-current protection circuit with a no-load threshold value to form a no-load indication signal, which is transmitted to the control module via optical coupling isolation.
6. The monitoring protection circuit of the modular single inverter of claim 1, wherein the inverter circuit is connected with a protection module, the inverter circuit comprises a MOS transistor Q4, a MOS transistor Q5, a MOS transistor Q6 and a MOS transistor Q7 which are connected in series, and the MOS transistor constitutes a single full bridge inverter circuit for completing the conversion from the direct current to the alternating current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921657935.1U CN210780593U (en) | 2019-09-30 | 2019-09-30 | Monitoring protection circuit of modularization single-phase inverter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921657935.1U CN210780593U (en) | 2019-09-30 | 2019-09-30 | Monitoring protection circuit of modularization single-phase inverter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210780593U true CN210780593U (en) | 2020-06-16 |
Family
ID=71034053
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921657935.1U Expired - Fee Related CN210780593U (en) | 2019-09-30 | 2019-09-30 | Monitoring protection circuit of modularization single-phase inverter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210780593U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112162166A (en) * | 2020-09-25 | 2021-01-01 | 珠海智融科技有限公司 | USB charging port no-load detection circuit and detection method thereof |
-
2019
- 2019-09-30 CN CN201921657935.1U patent/CN210780593U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112162166A (en) * | 2020-09-25 | 2021-01-01 | 珠海智融科技有限公司 | USB charging port no-load detection circuit and detection method thereof |
| CN112162166B (en) * | 2020-09-25 | 2022-02-25 | 珠海智融科技股份有限公司 | USB charging port no-load detection circuit and detection method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104167980B (en) | Photovoltaic system with intelligent turn-off function | |
| CN109038669A (en) | Realize the photovoltaic system that component level is automatically shut down | |
| WO2016078507A1 (en) | Photovoltaic intelligent power supply | |
| WO2014107846A1 (en) | Fully-controlled bridge-type rectifying device having surge suppression function | |
| CN210780593U (en) | Monitoring protection circuit of modularization single-phase inverter | |
| CN105743358B (en) | A kind of uninterrupted variable-frequency power sources of backup type | |
| CN205160194U (en) | Power supply system is synthesized to fire control host computer that possesses activestandby electrical detection circuitry | |
| CN102437627B (en) | Charger without standby power consumption | |
| CN203071637U (en) | DC power supply connection control apparatus | |
| CN205812466U (en) | LED drives control circuit | |
| CN106130354A (en) | The high pressure DC DC changer that a kind of 10kV powers | |
| CN204497847U (en) | Photovoltaic plant monitoring management system | |
| CN205647286U (en) | Sinusoidal wave invertion power supply | |
| CN203775060U (en) | Low-voltage ride-through power source for frequency converter | |
| CN108650761B (en) | Street lamp power supply and metering module | |
| CN106208717A (en) | The high pressure DC DC changer that a kind of 2kV powers | |
| CN211457010U (en) | High-temperature-resistant AC-DC power supply | |
| CN205986157U (en) | Hybrid AC/DC power supply system | |
| CN205453235U (en) | Mining high -pressure flame proof converter uninterrupted power source power supply unit | |
| CN114583699A (en) | Rapid turn-off device for photovoltaic power generation, intelligent photovoltaic module and turn-off method | |
| CN103762865A (en) | Low-voltage ride-through power source for frequency converter | |
| CN206023582U (en) | The high pressure DC DC changers that a kind of 10KV powers | |
| CN107437849A (en) | The online switch modulation digital communication control system of local power utilization network | |
| CN204290507U (en) | A kind of electricity getting device of ultra-high-tension power transmission line | |
| CN206023581U (en) | The high pressure DC DC changers that a kind of 2KV powers |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200616 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |