CN114142806A - Time delay starting circuit and photovoltaic power generation system - Google Patents

Time delay starting circuit and photovoltaic power generation system Download PDF

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Publication number
CN114142806A
CN114142806A CN202111636825.9A CN202111636825A CN114142806A CN 114142806 A CN114142806 A CN 114142806A CN 202111636825 A CN202111636825 A CN 202111636825A CN 114142806 A CN114142806 A CN 114142806A
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China
Prior art keywords
circuit
resistor
diode
coil
delay
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CN202111636825.9A
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Chinese (zh)
Inventor
王猛
周贺继
张煜
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Aerospace Baykee Guangdong Technology Co ltd
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Aerospace Baykee Guangdong Technology Co ltd
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Priority to CN202111636825.9A priority Critical patent/CN114142806A/en
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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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/54—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
    • H02S50/00—Monitoring or testing of PV systems, e.g. load balancing or fault identification
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2310/00—The network for supplying or distributing electric power characterised by its spatial reach or by the load
    • H02J2310/50—The network for supplying or distributing electric power characterised by its spatial reach or by the load for selectively controlling the operation of the loads
    • H02J2310/56—The network for supplying or distributing electric power characterised by its spatial reach or by the load for selectively controlling the operation of the loads characterised by the condition upon which the selective controlling is based
    • H02J2310/58—The condition being electrical
    • 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

Abstract

The disclosure relates to the technical field of electrical control, in particular to a delay starting circuit. The delay starting circuit comprises a delay module, a first switching-on signal generating module and a second switching-on signal generating module, wherein the delay module is used for generating and outputting a first switching-on signal after preset time; the starting module is connected to the time delay module to receive the first conduction signal, and after the first conduction signal is received, the starting module starts the external electrical equipment. The delayed start is realized through hardware, control ends such as an MCU (microprogrammed control unit) and the like do not need to be additionally introduced, and the control is more stable through pure hardware.

Description

Time delay starting circuit and photovoltaic power generation system
Technical Field
The disclosure relates to the technical field of electrical control, in particular to a delay starting circuit.
Background
With the continuous development of the power electronics industry, various types of power electronics devices are widely used.
Some professional electrical devices are included, but the use environments of the devices are mostly non-professional persons, and persons who do not know the use specifications are prone to generating electrical faults by mistake and threaten personal safety. Therefore, adding the delayed startup function to prevent the non-professional technicians from misoperation is an effective means.
However, most of the conventional delayed start methods are software control, and more computing resources are consumed.
Disclosure of Invention
In order to solve the technical problem or at least partially solve the technical problem, the present disclosure provides a delay start circuit, which can be implemented by hardware and consumes less time.
A first part:
the delay starting circuit comprises:
the time delay module is used for generating and outputting a first conduction signal after preset time;
the starting module is connected to the time delay module to receive the first conduction signal, and when the first conduction signal is received, the starting module starts external electrical equipment;
optionally, the delay module includes:
the first delay capacitor is used for generating a first conducting signal after a preset time;
the first end of the first blocking circuit is electrically connected with an external power supply, the second end of the first blocking circuit is electrically connected with the first delay capacitor, and the third end of the first blocking circuit is used for controlling the first blocking circuit to be switched on or switched off;
the second conducting signal generating circuit is used for generating and outputting a second conducting signal, and the second conducting signal is used for controlling the first blocking circuit to be conducted;
and the self-recovery switch is used for long pressing to keep a closed state, a first end of the self-recovery switch is electrically connected to the second conducting signal generating circuit, and a second end of the self-recovery switch is electrically connected to a third end of the first blocking circuit.
Optionally, the starting module includes:
the first switch comprises a first coil and a first contact, the first coil is used for controlling the first contact to be closed or opened, the first end of the first coil is connected to an external power supply, and the first contact is used for controlling the power supply loop of the external electrical equipment to be opened or closed;
and a first end of the second blocking circuit is electrically connected to the second end of the first coil, a second end of the second blocking circuit is grounded, a third end of the second blocking circuit is used for controlling the second blocking circuit to be switched on or switched off, the third end of the second blocking circuit is connected to the time delay module to receive the first conducting signal, and the first conducting signal is used for conducting the second blocking circuit.
Optionally, the starting module includes:
the first switch comprises a first coil and a first contact, the first coil is used for controlling the first contact to be closed or opened, the first end of the first coil is grounded, and the first contact is used for controlling the power supply loop of the external electrical equipment to be opened or closed;
the second switch comprises a second coil and a second contact, the second coil is used for controlling the second contact to be closed or opened, the first end of the second coil is electrically connected to an external power supply, the first end of the second contact is electrically connected to the external power supply, and the second end of the second contact is electrically connected to the delay module and the second end of the first coil;
and a first end of the second blocking circuit is electrically connected to the second end of the second coil, a second end of the second blocking circuit is grounded, a third end of the second blocking circuit is used for controlling the second blocking circuit to be switched on or off, the third end is connected to the delay module to receive the first conducting signal, and the first conducting signal is used for conducting the second blocking circuit.
Optionally, the delay module includes: the circuit comprises a resistor R1, a resistor R2, a first diode D1, a triode Q1, a resistor R3, a second diode D2, a self-recovery switch button SW1 and a capacitor C1, wherein the first delay capacitor comprises the capacitor C1, the first blocking circuit comprises a triode Q1, a resistor R3 and a second diode D2, the second conducting signal generating circuit comprises the resistor R1, a resistor R2 and a first diode D1, and the self-recovery switch comprises the self-recovery switch button SW 1;
the triode Q1 is a PNP triode, the first end of the resistor R1 is connected with an external power supply, the second end of the resistor R1 is connected with the base of the triode Q1 and the first end of the resistor R2, the second end of the resistor R2 is connected with the anode of the diode D1, the cathode of the diode D1 is connected with the first end of the self-recovery switch button SW1, the second end of the self-recovery switch button SW1 is grounded, the collector of the triode Q1 is connected with the first end of the resistor R3, the second end of the resistor R3 is connected with the anode of the diode D2, the cathode of the second diode D2 is connected with the anode of the capacitor C1, and the cathode of the capacitor C1 is grounded.
Optionally, the starting module includes: the circuit comprises a resistor R4, a resistor R5, a third diode D3, a fourth diode D4, a fifth diode D5, a triode Q2, a first relay RL1 and a second relay RL2, wherein the first switch comprises a first relay RL1, the second switch comprises a second relay RL2, and the second blocking circuit comprises a resistor R4, a resistor R5, a third diode D3, a fourth diode D4, a fifth diode D5 and a triode Q2;
the triode Q2 is an NPN triode, a first end of a resistor R5 is connected to the positive electrode of a capacitor C1, a second end of the resistor R5 is connected to the base electrode of a triode Q2, the collector electrode of the triode Q2 is connected to the positive electrode of a diode D4 and the first end of the coil of a relay RL1, the emitter electrode of the triode Q2 is grounded, a second end of the coil of a relay RL1 is connected to an external power supply and the negative electrode of a diode D4, a first end of the contact of a relay RL1 is connected to the external power supply, a second end of the contact of the relay RL1 is connected to the first end of a resistor R4, the first end of the coil of the relay RL2 and the negative electrode of a diode D5, a second end of a resistor R4 is connected to the negative electrode of a third diode D3, the positive electrode of a third diode D3 is connected to the positive electrode of a capacitor C1, and a second end of the coil of a relay RL2 is connected to the positive electrode of a fifth diode D5 and grounded.
A second part:
a photovoltaic system comprising a delayed start circuit according to any of the first sections.
Optionally, the photovoltaic power generation system further comprises a load detection circuit, the load detection circuit is connected to the delay starting circuit, the load detection circuit is used for detecting a load of the photovoltaic system, and when the load is lower than a preset load value, the load detection circuit closes the delay starting circuit.
Compared with the prior art, the technical scheme provided by the embodiment of the disclosure has the following advantages:
the delay starting circuit provided by the embodiment of the disclosure can realize delay starting through hardware, and control ends such as an MCU (micro control unit) do not need to be additionally introduced, so that control is more stable through pure hardware realization. The control circuit can be applied to control systems of various electrical systems without additionally arranging an electrical isolation circuit.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.
In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present disclosure, the drawings used in the description of the embodiments or prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of a delay start circuit according to an embodiment of the disclosure;
fig. 2 is a second schematic diagram of the delay start circuit according to the embodiment of the disclosure;
fig. 3 is a third schematic diagram of a delay start circuit according to a third embodiment of the disclosure;
fig. 4 is a fourth schematic diagram of the delay start circuit according to the embodiment of the disclosure;
FIG. 5 is a circuit diagram of a delayed start circuit according to an embodiment of the disclosure;
fig. 6 is a schematic structural diagram of a photovoltaic system according to an embodiment of the present disclosure.
Wherein, 1, a delay module; 101. a first delay capacitor; 102. a first blocking circuit; 103. A second on signal generating circuit; 104. a self-recovery switch; 2. a starting module; 201. a first switch; 2011. a first coil; 2012. a first contact; 202. a second switch; 2021. a second coil; 2022. a second contact; 203. a second blocking circuit; 3. an external power supply; 4. an external electrical device; 5. a photovoltaic system; 6. a load detection circuit.
Detailed Description
In order that the above objects, features and advantages of the present disclosure may be more clearly understood, aspects of the present disclosure will be further described below. It should be noted that the embodiments and features of the embodiments of the present disclosure may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present disclosure, but the present disclosure may be practiced in other ways than those described herein; it is to be understood that the embodiments disclosed in the specification are only a few embodiments of the present disclosure, and not all embodiments.
Example 1:
fig. 1 is a schematic structural diagram of a delay start circuit according to an embodiment of the disclosure. As shown in fig. 1, the delay start circuit includes a delay module 1 and a start module 2, where the delay module 1 is configured to generate and output a first conduction signal to the outside after a preset time; the starting module 2 is connected to the delay module 1 to receive the first conduction signal output by the delay module 1, and after receiving the first conduction signal, the starting module 2 conducts a power-on loop where the external electrical device 4 is located to start the external electrical device 4.
Example 2:
fig. 2 is a second schematic diagram of the delay start circuit according to the embodiment of the disclosure. As shown in fig. 2, the delay locked loop circuit according to embodiment 1 is provided. The delay module 1 includes a first delay capacitor 101, a first blocking circuit 102, a second on signal generating circuit 103, and a self-recovery switch 104.
The first delay capacitor 101 is configured to generate and output a first on signal after a preset time.
A first terminal of the first blocking circuit 102 is electrically connected to the external power supply 3, a second terminal of the first blocking circuit 102 is electrically connected to the first delay capacitor 101, and a third terminal of the first blocking circuit 102 is used to control the first blocking circuit 102 to be turned on or off.
A second on signal generating circuit 103, configured to generate and output a second on signal, where the second on signal is input to a third terminal of the first blocking circuit 102 to control the first blocking circuit 102 to be turned on;
and a self-recovery switch 104, wherein the self-recovery switch 104 is used for long-term pressing for a worker to keep a closed state, a first end of the self-recovery switch 104 is electrically connected to the second conducting signal generating circuit 103, and a second end is electrically connected to the third end of the first blocking circuit 102.
In particular, the method comprises the following steps of,
the capacity of the first delay capacitor 101 is determined by an engineer according to the time of the required delay and the power supply for charging the first delay capacitor 101. The capacity size of the first delay capacitor 101 is confirmed as follows, 1, a power supply for charging the first delay capacitor 101 is determined, for example, the power supply is determined as an external power supply 3 in the present embodiment; 2. determining the time of the required delay; 3. and replacing the first delay capacitor 101 with different capacities for a limited number of times until finding a capacitor which consumes the same time as the time for determining the required delay when the voltage at the two ends reaches the preset value when the first delay capacitor 101 is charged.
A first terminal of the first blocking circuit 102 is electrically connected to the external power supply 3, and a second terminal of the first blocking circuit 102 is electrically connected to the first delay capacitor 101. When the first blocking circuit 102 is turned on, the external power supply 3 can be enabled to charge the first delay capacitor 101. The third terminal of the first blocking circuit 102 is a control terminal for controlling the first blocking circuit 102 to be turned on.
A first terminal of the self-recovery switch 104 is electrically connected to the second conducting signal generating circuit 103, the second conducting signal generating circuit 103 is configured to generate and output a second conducting signal, and the second conducting signal is input to a third terminal of the first blocking circuit 102 and then can control the first blocking circuit 102 to be conducted. A second terminal of the self-recovery switch 104 is electrically connected to a third terminal of the first blocking circuit 102. When the worker presses the switch for a long time to keep the closed state, the second on signal generated and outputted by the second on signal generating circuit 103 is inputted to the third terminal of the first blocking circuit 102 through the self-recovery switch 104, and the first blocking circuit 102 is turned on.
After the first blocking circuit 102 is turned on, the external power supply 3 starts to charge the first delay capacitor 101, the voltage across the first delay capacitor 101 starts to gradually increase until the voltage rises to a preset value after a preset time, and the voltage across the first delay capacitor 101 is output as a first turn-on signal.
Example 3:
fig. 3 is a third schematic diagram of a delay start circuit according to the third embodiment of the disclosure. As shown in fig. 3, based on the delayed start circuit described in embodiment 1, the start module 2 includes:
the first switch 201, the first switch 201 includes a first coil 2011 and a first contact 2012, the first coil 2011 is used for controlling the first contact 2012 to be closed or opened, a first end of the first coil 2011 is connected to the external power source 3, and the first contact 2012 is used for controlling the power supply circuit of the external electrical device 4 to be opened or closed;
a second blocking circuit 203, a first end of the second blocking circuit 203 is electrically connected to a second end of the first coil 2011, a second end of the second blocking circuit 203 is grounded, a third end of the second blocking circuit 203 is used to control the second blocking circuit 203 to be turned on or off, a third end of the second blocking circuit 203 is connected to the delay module 1 to receive the first conducting signal, and the first conducting signal is used to conduct the second blocking circuit 203.
In particular, the method comprises the following steps of,
the first switch 201 includes a first coil 2011 and a first contact 2012, and when a current flows through the first coil 2011, the first coil 2011 controls the first contact 2012 to be closed. The first contact 2012 is arranged in the power supply circuit of the external electrical device 4, and the first contact 2012 is closed to form a complete power supply circuit for powering the external electrical device 4, and the external electrical device 4 is started.
A first end of the first coil 2011 is connected to the external power source 3, a second end of the first coil 2011 is connected to a first end of the second blocking circuit 203, and a second end of the second blocking circuit 203 is grounded. The third terminal of the second blocking circuit 203 is configured to control the second blocking circuit 203 to turn on or off, and the third terminal of the second blocking circuit 203 is connected to the delay module 1 to receive the first conducting signal, where the first conducting signal is configured to conduct the second blocking circuit 203.
When the delay module 1 outputs the first on signal after the preset time, the second blocking circuit 203 is turned on, and at this time, the current of the external power supply 3 flows into the ground through the first coil 2011. The first coil 2011 has current flowing through it, and the first contact 2012 is controlled by the first coil 2011 to be closed, so as to form a complete power supply loop to supply power to the external electrical device 4, so as to smoothly start the external electrical device 4.
Example 4:
fig. 4 is a fourth schematic diagram of the delay start circuit according to the embodiment of the disclosure. As shown in fig. 4, based on the delayed start circuit shown in embodiment 1, the start module 2 includes:
a first switch 201, the first switch 201 including a first coil 2011 and a first contact 2012, the first coil 2011 being configured to control the first contact 2012 to be closed or opened, a first end of the first coil 2011 being grounded, the first contact 2012 being configured to control the power supply circuit of the external electrical device 4 to be opened or closed;
a second switch 2021, the second switch 2021 includes a second coil 2021 and a second contact 2022, the second coil 2021 is used to control the second contact 2022 to close or open, a first end of the second coil 2021 is electrically connected to the external power source 3, a first end of the second contact 2022 is electrically connected to the external power source 3, and a second end of the second contact 2022 is electrically connected to the delay module 1 and a second end of the first coil 2011;
a second blocking circuit 203, a first terminal of the second blocking circuit 203 is electrically connected to the second terminal of the second coil 2021, a second terminal of the second blocking circuit 203 is grounded, a third terminal of the second blocking circuit 203 is used for controlling the second blocking circuit 203 to be turned on or off, the third terminal is connected to the delay module 1 to receive the first conducting signal, and the first conducting signal is used for conducting the second blocking circuit 203.
In particular, the method comprises the following steps of,
the first switch 201 includes a first coil 2011 and a first contact 2012, and when a current flows through the first coil 2011, the first coil 2011 controls the first contact 2012 to be closed. The first contact 2012 is arranged in the power supply circuit of the external electrical device 4, and the first contact 2012 is closed to form a complete power supply circuit for powering the external electrical device 4 for activating the external electrical device 4.
When the second blocking circuit 203 receives the first conducting signal sent by the delay module 1, the second blocking circuit 203 is conducted. At this time, the current of the external power supply 3 flows into the ground through the second coil 2021 and the second blocking circuit 203. After the current flows through the second coil 2021, the second contact 2022 is closed. The current of the external power source 3 flows into the ground through the second contact 2022 and the first coil 2011. After the current flows through the first coil 2011, the first contact 2012 is closed, so that a complete power supply loop for supplying power to the external electrical device 4 is formed, and the external electrical device 4 can be started smoothly.
And the electric energy of the external power supply 3 is input to the delay module 1 through the second contact 2022, which can maintain the delay module 1 to output the first conducting signal all the time, and finally maintain the first contact 2012 closed, and maintain the power supply loop of the external electrical device 4, so that the external device can operate all the time.
Example 5:
fig. 5 is a circuit diagram of a delay start circuit according to an embodiment of the disclosure, as shown in fig. 5:
a delay start circuit according to embodiment 1, wherein the delay start circuit further includes a delay start circuit,
the delay module 1 comprises: the circuit comprises a resistor R1, a resistor R2, a diode D1, a triode Q1, a resistor R3, a second diode D2, a self-recovery switch button SW1 and a capacitor C1, wherein the first delay capacitor comprises the capacitor C1, the first blocking circuit comprises the triode Q1, the resistor R3 and the second diode D2, the second conducting signal generating circuit comprises the resistor R1, the resistor R2 and the first diode D1, and the self-recovery switch comprises the self-recovery switch button SW 1.
The first end of the resistor R1 is connected with the external power supply 3, the second end of the resistor R1 is connected with the base of the triode Q1 and the first end of the resistor R2, the second end of the resistor R2 is connected with the anode of the diode D1, the cathode of the diode D1 is connected with the first end of the self-recovery switch button SW1, the second end of the self-recovery switch button SW1 is grounded, the collector of the triode Q1 is connected with the first end of the resistor R3, the second end of the resistor R3 is connected with the anode of the diode D2, the cathode of the second diode D2 is connected with the anode of the capacitor C1, and the cathode of the capacitor C1 is grounded.
The starting module 2 comprises: the circuit comprises a resistor R4, a resistor R5, a third diode D3, a fourth diode D4, a fifth diode D5, a triode Q2, a first relay RL1 and a second relay RL2, wherein the first switch comprises a first relay RL1, the second switch comprises a second relay RL2, and the second blocking circuit comprises a resistor R4, a resistor R5, a third diode D3, a fourth diode D4, a fifth diode D5 and a triode Q2.
The triode Q2 is an NPN triode, a first end of a resistor R5 is connected to the positive electrode of a capacitor C1, a second end of the resistor R5 is connected to the base electrode of a triode Q2, the collector electrode of the triode Q2 is connected to the positive electrode of a diode D4 and the first end of the coil of a relay RL1, the emitter electrode of the triode Q2 is grounded, the second end of the coil of the relay RL1 is connected to the external power supply 3 and the negative electrode of a diode D4, the first end of the contact of the relay RL1 is connected to the external power supply 3, the second end of the contact of the relay RL1 is connected to the first end of a resistor R4, the first end of the coil of the relay RL2 and the negative electrode of a diode D5, the second end of the resistor R4 is connected to the negative electrode of a third diode D3, the positive electrode of a third diode D3 is connected to the positive electrode of a capacitor C1, and the second end of the coil of an RL2 is connected to the positive electrode of a fifth diode D5 and grounded.
In particular, the method comprises the following steps of,
when the power is turned on, the worker manually closes the self-recovery switch button SW1 to keep the switch button SW1 in a closed state. The base voltage of the triode Q1 is pulled down, so that the triode Q1 is conducted, and the voltage at the end of the electrolytic capacitor C1 gradually rises after the voltage is divided by the resistors.
When the base voltage of the triode Q2 is higher than 0.7V, the base breakover voltage of the triode Q2 can be satisfied, the triode Q2 is in saturated conduction at this time, the VCC voltage passes through the coil of the relay RL1, the first end and the second end of the contact of the relay RL1 are mutually closed, and the relay RL1 is accordingly conducted.
After the first and second ends of the contact of the relay RL1 are closed to each other, the VCC voltage is connected to one end of the resistor R4 through the relay RL1 contact, and the first and second ends of the contact of the relay RL2 are closed to each other through the coil of the relay RL2, and the relay RL2 is thus turned on to form a complete power supply loop for supplying power to the external electrical device 4 for starting the external electrical device 4.
At this point, the operator releases the self-recovery switch button SW1, the voltage at the base of transistor Q1 rises, and transistor Q1 is turned off. However, since the reference voltage VCC maintains the voltage of the capacitor C1 through the relay RL1, the resistor R4, and the diode D3, the voltage of the base of the transistor Q2 is not lowered, the transistor Q2 is still in a conducting state, and the relay RL1 therefore maintains a pull-in state. Since RL1 maintains the attraction state, relay RL2 also maintains the attraction state, and external electric device 4 maintains normal operation. The delay start circuit described in this embodiment 5 realizes the delay action of the relay by using the voltage division of the resistor and the buffering action of the electrolytic capacitor, and the delay start circuit is realized by all hardware, so that the external electrical device 4 can be started after the worker presses the self-recovery switch SW1 for a long time, and the normal operation of the external electrical device 4 is maintained after the start. And because the circuit for controlling the external electrical apparatus 4 is realized by a relay, it can be applied to the control unit power supply circuits of various electrical apparatuses without electrical isolation.
Example 6:
fig. 6 is a schematic structural diagram of a photovoltaic system 5 according to an embodiment of the disclosure. As shown in fig. 6, a photovoltaic system 5 includes the delayed start circuit and a load detection circuit 6 described in embodiment 1. In other embodiments, the photovoltaic system 5 can further include the delayed start circuit of any of embodiments 2-5.
The delayed start circuit is used to start and maintain the operation of the photovoltaic system 5.
The load detection circuit 6 is connected to the delayed start circuit, and the load detection circuit 6 is used for detecting the load of the photovoltaic system 5. The load detection circuit 6 is an output power measurement device, the magnitude of the external output power of the photovoltaic system 5 is used as a load, and when the magnitude of the load is lower than a preset load value, the load detection circuit 6 closes the external power supply 3 connected to the delay starting circuit so as to close the delay starting circuit.
The photovoltaic system 5 provided by embodiment 6 can be automatically turned off when the off-grid or grid-connected output is not required, reducing the loss of the photovoltaic system 5.
It is noted that, in this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The foregoing are merely exemplary embodiments of the present disclosure, which enable those skilled in the art to understand or practice the present disclosure. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the disclosure. Thus, the present disclosure is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (8)

1. A delay start circuit, characterized in that the delay start circuit comprises:
the time delay module is used for generating and outputting a first conduction signal after preset time;
the starting module is connected to the time delay module to receive the first conduction signal, and after the first conduction signal is received, the starting module starts the external electrical equipment.
2. The delay start circuit of claim 1, wherein the delay module comprises:
the first delay capacitor is used for generating a first conducting signal after a preset time;
the first end of the first blocking circuit is electrically connected with an external power supply, the second end of the first blocking circuit is electrically connected with the first delay capacitor, and the third end of the first blocking circuit is used for controlling the first blocking circuit to be switched on or switched off;
the second conducting signal generating circuit is used for generating and outputting a second conducting signal, and the second conducting signal is used for controlling the first blocking circuit to be conducted;
and the self-recovery switch is used for long pressing to keep a closed state, a first end of the self-recovery switch is electrically connected to the second conducting signal generating circuit, and a second end of the self-recovery switch is electrically connected to a third end of the first blocking circuit.
3. The delayed start circuit of claim 2, wherein said start module comprises:
the first switch comprises a first coil and a first contact, the first coil is used for controlling the first contact to be closed or opened, the first end of the first coil is connected to an external power supply, and the first contact is used for controlling the power supply loop of the external electrical equipment to be opened or closed;
and a first end of the second blocking circuit is electrically connected to the second end of the first coil, a second end of the second blocking circuit is grounded, a third end of the second blocking circuit is used for controlling the second blocking circuit to be switched on or switched off, the third end of the second blocking circuit is connected to the time delay module to receive the first conducting signal, and the first conducting signal is used for conducting the second blocking circuit.
4. The delayed start circuit of claim 2, wherein said start module comprises:
the first switch comprises a first coil and a first contact, the first coil is used for controlling the first contact to be closed or opened, the first end of the first coil is grounded, and the first contact is used for controlling the power supply loop of the external electrical equipment to be opened or closed;
the second switch comprises a second coil and a second contact, the second coil is used for controlling the second contact to be closed or opened, the first end of the second coil is electrically connected to an external power supply, the first end of the second contact is electrically connected to the external power supply, and the second end of the second contact is electrically connected to the delay module and the second end of the first coil;
and a first end of the second blocking circuit is electrically connected to the second end of the second coil, a second end of the second blocking circuit is grounded, a third end of the second blocking circuit is used for controlling the second blocking circuit to be switched on or off, the third end is connected to the delay module to receive the first conducting signal, and the first conducting signal is used for conducting the second blocking circuit.
5. The delay start circuit of claim 4, wherein the delay module comprises: the circuit comprises a resistor R1, a resistor R2, a first diode D1, a triode Q1, a resistor R3, a second diode D2, a self-recovery switch button SW1 and a capacitor C1, wherein the first delay capacitor comprises the capacitor C1, the first blocking circuit comprises a triode Q1, a resistor R3 and a second diode D2, the second conducting signal generating circuit comprises the resistor R1, a resistor R2 and a first diode D1, and the self-recovery switch comprises the self-recovery switch button SW 1;
the triode Q1 is a PNP triode, the first end of the resistor R1 is connected with an external power supply, the second end of the resistor R1 is connected with the base of the triode Q1 and the first end of the resistor R2, the second end of the resistor R2 is connected with the anode of the diode D1, the cathode of the diode D1 is connected with the first end of the self-recovery switch button SW1, the second end of the self-recovery switch button SW1 is grounded, the collector of the triode Q1 is connected with the first end of the resistor R3, the second end of the resistor R3 is connected with the anode of the diode D2, the cathode of the second diode D2 is connected with the anode of the capacitor C1, and the cathode of the capacitor C1 is grounded.
6. The delayed start circuit of claim 5, wherein said start module comprises: the circuit comprises a resistor R4, a resistor R5, a third diode D3, a fourth diode D4, a fifth diode D5, a triode Q2, a first relay RL1 and a second relay RL2, wherein the first switch comprises a first relay RL1, the second switch comprises a second relay RL2, and the second blocking circuit comprises a resistor R4, a resistor R5, a third diode D3, a fourth diode D4, a fifth diode D5 and a triode Q2;
the triode Q2 is an NPN triode, a first end of a resistor R5 is connected to the positive electrode of a capacitor C1, a second end of the resistor R5 is connected to the base electrode of a triode Q2, the collector electrode of the triode Q2 is connected to the positive electrode of a diode D4 and the first end of the coil of a relay RL1, the emitter electrode of the triode Q2 is grounded, a second end of the coil of a relay RL1 is connected to an external power supply and the negative electrode of a diode D4, a first end of the contact of a relay RL1 is connected to the external power supply, a second end of the contact of the relay RL1 is connected to the first end of a resistor R4, the first end of the coil of the relay RL2 and the negative electrode of a diode D5, a second end of a resistor R4 is connected to the negative electrode of a third diode D3, the positive electrode of a third diode D3 is connected to the positive electrode of a capacitor C1, and a second end of the coil of a relay RL2 is connected to the positive electrode of a fifth diode D5 and grounded.
7. A photovoltaic system comprising the delayed start circuit of any of claims 1-6.
8. The photovoltaic system of claim 7, further comprising a load detection circuit coupled to the delayed start circuit, the load detection circuit configured to detect a load on the photovoltaic system, the load detection circuit configured to turn off the delayed start circuit when the magnitude of the load is below a predetermined load value.
CN202111636825.9A 2021-12-29 2021-12-29 Time delay starting circuit and photovoltaic power generation system Pending CN114142806A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115118151A (en) * 2022-07-19 2022-09-27 西安军陶科技有限公司 Soft and hard double control circuit and power supply starting control method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115118151A (en) * 2022-07-19 2022-09-27 西安军陶科技有限公司 Soft and hard double control circuit and power supply starting control method
CN115118151B (en) * 2022-07-19 2024-02-06 西安军陶科技有限公司 Soft and hard double-control circuit and power supply starting control method

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