An AC / DC emergency power supply control circuit

Abstract

The present application relates to an AC / DC emergency power supply control circuit, and relates to the technical field of emergency power supply, including a power supply module, a high and low voltage power supply module, an AC output module, a feedback protection module and a main control module; the main control module includes a main control chip IC1, the feedback protection module includes a primary feedback submodule, a secondary feedback submodule, an AC feedback submodule and a protection submodule, the protection submodule input end is connected to the primary feedback submodule output end; the AC feedback submodule input end is connected to the high voltage AC output end, the AC feedback submodule output end is connected to the AC feedback input pin of the main control chip IC1 through a first optical coupler, and the DC feedback input pin of the main control chip IC1 is sequentially connected to the primary feedback submodule and the secondary feedback submodule. The present application has the effect of improving the safety of using AC / DC emergency power supplies.

Description

Technical Field

[0001] The present application relates to the technical field of emergency power supply, and in particular to an AC / DC emergency power supply control circuit. Background Art

[0002] The emergency power supply is mainly composed of chargers, inverters, batteries, isolation transformers, switches and other devices, which can convert DC power into AC power for output. When the mains fails or a fire occurs, the battery of the emergency power supply is converted into AC power through the inverter, and then passes through the isolation transformer to provide power for emergency lighting indicators or other equipment.

[0003] Regarding the above-mentioned related technologies, since the emergency power supply usually needs to provide high-voltage AC power to multiple devices when in use, it is easy to cause dangerous situations such as overvoltage, overload and leakage, which leads to safety hazards in the use of the emergency power supply. Summary of the invention

[0004] The purpose of the present application is to provide an AC / DC emergency power supply control circuit, which can improve the safety of the AC / DC emergency power supply when in use.

[0005] In the first aspect, the present application provides an AC / DC emergency power supply control circuit adopting the following technical solution:

[0006] An AC / DC emergency power supply control circuit includes a power supply module, a high and low voltage power supply module, an AC output module, a feedback protection module and a main control module, wherein the output end of the power supply module is connected to the input end of the high and low voltage power supply module, and the power output by the power supply module is transformed into high voltage DC power and low voltage DC power by the high and low voltage power supply module;

[0007] The output end of the high and low voltage power supply module includes a high voltage direct current output end and a low voltage direct current output end, the high voltage direct current output end is connected to the input end of the alternating current output module, the high voltage direct current output by the high and low voltage power supply module passes through the alternating current output module to form high voltage alternating current, and the output end of the alternating current output module is a high voltage alternating current output end;

[0008] The main control module includes a main control chip IC1, and the main control chip IC1 includes a PWMA control signal output pin, a PWMB control signal output pin, an AC feedback input pin, and a DC feedback input pin. The PWMA control signal output pin and the PWMB control signal output pin are connected to the control signal input end of the high and low voltage power supply modules;

[0009] The feedback protection module includes a primary feedback submodule, a secondary feedback submodule, an AC feedback submodule and a protection submodule, and the input end of the protection submodule is connected to the output end of the primary feedback submodule;

[0010] The input end of the AC feedback submodule is connected to the high-voltage AC output end, the output end of the AC feedback submodule is connected to the AC feedback input pin of the main control chip IC1 through a first optocoupler, and the DC feedback input pin of the main control chip IC1 is connected to the primary feedback submodule and the secondary feedback submodule in sequence.

[0011] By adopting the above technical solution, this application realizes an emergency power supply that can provide low-voltage direct current and high-voltage alternating current at the same time through high and low voltage power supply modules and AC output modules. This application connects the feedback protection module through the main control chip IC1 to realize real-time feedback during the use of the emergency power supply. When dangerous situations such as overvoltage, overcurrent, overload and leakage occur, it can be fed back to the main control chip IC1 in time, and protective measures such as power failure can be taken in time. At the same time, this application is equipped with multi-level feedback to improve the real-time and reliability of feedback, thereby improving the safety of AC and DC emergency power supply when in use.

[0012] Further, the primary feedback submodule includes a feedback protection chip IC2, the secondary feedback submodule includes a feedback protection chip IC3, the feedback protection chip IC2 includes a primary feedback input pin and a primary feedback output pin, and the feedback protection chip IC3 includes a secondary feedback output pin;

[0013] The secondary feedback output pin is connected to the primary feedback input pin through a second optical coupler, and the primary feedback output pin is connected to a DC feedback input pin of the main control chip IC1.

[0014] By adopting the above technical solution, the present application forms multi-level feedback through the main control chip IC1, the feedback protection chip IC2 and the feedback protection chip IC3. When dangerous situations such as overvoltage, overcurrent, overload and leakage occur, the feedback protection chip IC3 sends a feedback signal to the feedback protection chip IC2, and the feedback protection chip IC2 sends a feedback signal to the main control chip IC1 to cut off the output of the main control chip IC1 or the feedback protection chip IC2, thereby protecting the emergency power supply. Through the multi-level feedback method, the real-time and reliability of the feedback protection can be effectively improved.

[0015] Furthermore, the feedback protection chip IC2 also includes a low voltage protection output pin, a low voltage warning output pin and a high voltage protection output pin. The low voltage protection output pin is connected to the low voltage protection input terminal of the protection submodule, the low voltage warning output pin is connected to the low voltage warning input terminal of the protection submodule, and the high voltage protection output pin is connected to the high voltage protection input terminal of the protection submodule.

[0016] By adopting the above technical solution, the present application connects the low voltage protection input terminal, the low voltage warning input terminal and the high voltage protection input terminal of the protection sub-module through the feedback protection chip IC2. When the voltage of the emergency power supply is too low or too high, low voltage protection and high voltage protection of the emergency power supply can be achieved, thereby improving the safety of the emergency power supply when in use.

[0017] Furthermore, it also includes a frequency adjustment module, the frequency adjustment module is connected to the low-voltage direct current output terminal, and the signal input terminal of the frequency adjustment module is connected to the signal output terminal of the feedback protection module;

[0018] The frequency adjustment module includes a sliding resistor VR1, and the low voltage direct current output frequency is adjusted by adjusting the resistance value of the sliding resistor VR1.

[0019] By adopting the above technical solution, since different countries and regions have different standards for power supply output frequency, this application sets a frequency adjustment module to adjust the output frequency of the emergency power supply before leaving the factory to improve the practicality of the emergency power supply.

[0020] Furthermore, the feedback protection chip IC3 also includes a PWM1 control signal output pin, a PWM2 control signal output pin, a PWMC control signal output pin and a PWMD control signal output pin;

[0021] The PWM1 control signal output pin and the PWM2 control signal output pin are connected to the signal input end of the frequency adjustment module, and the PWMC control signal output pin and the PWMD control signal output pin are connected to the signal input end of the AC output module.

[0022] By adopting the above technical solution, the present application controls the frequency adjustment module and the AC output module through the feedback protection chip IC3, so as to timely cut off the power supply to the corresponding circuit when feedback protection is required, thereby ensuring the safety of the emergency power supply.

[0023] Furthermore, the AC output module also includes a leakage feedback input terminal. When the leakage feedback input terminal detects leakage current, the feedback protection chip IC3 controls the field effect transistor Q10, the field effect transistor Q11, the field effect transistor Q12 and the field effect transistor Q13 to be disconnected.

[0024] By adopting the above technical solution, the present application performs leakage protection on the AC output module through the feedback protection chip IC3 to ensure the safety of the emergency power supply during use.

[0025] Furthermore, the high and low voltage power supply module includes a field effect tube Q1, a field effect tube Q2, a field effect tube Q3, a field effect tube Q4, a transformer T1, a first rectifier bridge and a second rectifier bridge, and the output end of the transformer T1 includes a high voltage output winding and a low voltage output winding;

[0026] The output end of the power module and the control signal output end of the main control module are connected to the input end of the transformer T1 through field effect transistors Q1, Q2, Q3 and Q4;

[0027] The low voltage output winding of the transformer T1 is connected to the input end of the first rectifier bridge, and the output end of the first rectifier bridge is a low voltage DC output end;

[0028] The high-voltage output winding of the transformer T1 is connected to the input end of the second rectifier bridge, and the output end of the second rectifier bridge is a high-voltage direct current output end.

[0029] By adopting the above technical solution, the present application converts the battery power output by the power module into alternating current through field effect transistor Q1, field effect transistor Q2, field effect transistor Q3, and field effect transistor Q4, and divides it into a low-voltage electricity part and a high-voltage electricity part after passing through a transformer T1 with a dual output winding. The low-voltage electricity part and the high-voltage electricity part are rectified by the first rectifier bridge and the second rectifier bridge respectively into low-voltage direct current and high-voltage direct current for output, so as to ensure that the emergency power supply of the present application can provide low-voltage electricity and high-voltage electricity respectively, thereby improving the practicality of the emergency power supply.

[0030] Further, the output end of the AC output module includes an AC live wire output end and an AC neutral wire output end, and the AC output module includes a field effect transistor Q10, a field effect transistor Q11, a field effect transistor Q12 and a field effect transistor Q13;

[0031] The high-voltage DC output end is connected to the AC live wire output end of the AC output module through the field effect transistor Q10 and the field effect transistor Q11;

[0032] The high-voltage DC output terminal is connected to the AC neutral line output terminal of the AC output module through the field effect transistor Q12 and the field effect transistor Q13.

[0033] By adopting the above technical solution, the present application converts high-voltage direct current into high-voltage alternating current for output through field effect transistor Q10, field effect transistor Q11, field effect transistor Q12 and field effect transistor Q13, so that the emergency power supply of the present application can output high-voltage alternating current, thereby improving the practicality of the emergency power supply.

[0034] Furthermore, it also includes an inverter operation display module, wherein the input end of the inverter operation display module is used to connect to the inverter;

[0035] The inverter operation display module comprises a two-color light emitting diode, and the two-color light emitting diode is used to display the working state of the inverter.

[0036] By adopting the above technical solution, the present application displays the working status of the inverter in the emergency power supply through the inverter working display module to ensure that the user can check the working status of the inverter at any time and perform timely maintenance when the inverter fails, thereby further ensuring the safety of the emergency power supply when in use.

[0037] Furthermore, it also includes a USB control module, wherein the input end of the USB control module is connected to the USB interface and the inverter interface, and the output end of the USB control module is connected to the first output socket through the inverter working display module;

[0038] The USB control module includes a USB voltage regulator chip U2 and its peripheral circuits.

[0039] By adopting the above technical solution, the present application sets up a USB control module to reduce the high voltage connected to the USB interface, thereby outputting power to the first output socket to ensure the reliability of the emergency power supply.

[0040] In summary, the present application includes at least one of the following beneficial technical effects:

[0041] 1. This application connects the feedback protection module through the main control chip IC1 to achieve real-time feedback during the use of the emergency power supply. When dangerous situations such as overvoltage, overcurrent, overload and leakage occur, feedback can be promptly sent to the main control chip IC1, and power-off and other protective measures can be taken in time. At the same time, this application is equipped with multi-level feedback to improve the real-time and reliability of feedback, thereby improving the safety of AC and DC emergency power supplies when in use;

[0042] 2. This application connects the low voltage protection input terminal, low voltage warning input terminal and high voltage protection input terminal of the protection submodule through the feedback protection chip IC2. When the voltage of the emergency power supply is too low or too high, low voltage protection and high voltage protection of the emergency power supply can be realized, thereby improving the safety of the emergency power supply when in use;

[0043] 3. This application controls the frequency adjustment module and the AC output module through the feedback protection chip IC3, so that the corresponding circuit can be powered off in time when feedback protection is required to ensure the safety of the emergency power supply. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 It is a schematic diagram of module connection in an embodiment of the present application;

[0045] Figure 2 is an overall circuit schematic diagram of an embodiment of the present application;

[0046] Figure 3 It is a circuit schematic diagram of the power supply module and the high and low voltage power supply module of the embodiment of the present application;

[0047] Figure 4is a circuit schematic diagram of an AC output module and a frequency adjustment module in an embodiment of the present application;

[0048] Figure 5 This is the circuit schematic diagram of the main control module and feedback protection module of the embodiment of the present application

[0049] Figure 6 It is a circuit schematic diagram of the inverter working display module and the USB control module of the embodiment of the present application;

[0050] In the figure, 1. power supply module; 2. high and low voltage power supply module; 3. AC output module; 4. frequency adjustment module; 5. feedback protection module; 51. primary feedback submodule; 52. secondary feedback submodule; 53. AC feedback submodule; 54. protection submodule; 6. main control module; 7. inverter working display module; 8. USB control module. DETAILED DESCRIPTION

[0051] The following is combined with Figure 1 -Attached Figure 6 , further details of this application are given.

[0052] Since the emergency power supply usually needs to provide high-voltage AC power to multiple devices when in use, it is easy to cause dangerous situations such as overvoltage, overload and leakage, which leads to safety hazards in the use of the emergency power supply. Therefore, this application provides an AC / DC emergency power supply control circuit, referring to Figure 1 and Figure 2 , including a power module 1, a high and low voltage power supply module 2, an AC output module 3, a frequency adjustment module 4, a feedback protection module 5 and a main control module 6, wherein the power module 1 is used to provide battery power and low voltage DC or high voltage AC output by the emergency power supply to the socket, the high and low voltage power supply module 2 is used to convert the battery power into low voltage DC and high voltage DC, the AC output module 3 is used to convert high voltage DC into high voltage AC, the frequency adjustment module 4 is used to adjust the frequency of the emergency power supply output power, the feedback protection module 5 is used to perform feedback protection on the emergency power supply, and the main control module 6 is used to perform overall control of the emergency power supply control circuit.

[0053] The implementation principle of the embodiment of the present application is: through the high and low voltage power supply module 2 and the AC output module 3, an emergency power supply that can simultaneously provide low voltage DC power and high voltage AC power is realized, and the feedback protection module 5 is connected through the main control module 6 to realize real-time feedback during the use of the emergency power supply. When dangerous situations such as overvoltage, overcurrent, overload and leakage occur, feedback can be timely sent to the main control module 6, and protective measures such as power off can be taken in time.

[0054] like Figure 2 and Figure 3As shown, the power module 1 of the embodiment of the present application outputs to the socket and the high and low voltage power supply module 2 through the battery output terminal BAT12V of the emergency power supply. Since the emergency power supply needs to power a variety of devices, different sockets are provided to adapt to different devices, including socket CN1, socket CN2, socket CN3, socket CN5 and socket CN6. Among them, BAT12V is the direct output voltage of the battery, P15V is the low-voltage DC output voltage of the emergency power supply, ACN is the neutral line output voltage of the high-voltage AC of the emergency power supply, and ACL is the live line output voltage of the high-voltage AC of the emergency power supply.

[0055] like Figure 2 and Figure 3 As shown, the high and low voltage power supply module 2 of the embodiment of the present application includes a field effect tube Q1, a field effect tube Q2, a field effect tube Q3, a field effect tube Q4, an electrolytic capacitor EC1, an electrolytic capacitor EC2, an electrolytic capacitor EC4, an electrolytic capacitor EC5, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a resistor R7, a resistor R29, a capacitor C7, a capacitor C9, a voltage regulator ZD2, a transformer T1, and a diode D5, a diode D6, a diode D7, a diode D8, a first rectifier bridge and a diode D9, a diode D10, a diode D11, and a second rectifier bridge composed of a diode D12. The electrolytic capacitor EC1 and the electrolytic capacitor EC2 are connected in parallel, one end is connected to the direct output voltage BAT12V of the battery, and the other end is grounded, and the direct output voltage BAT12V of the battery is connected to the input winding of the transformer T1 after passing through the electrolytic capacitor EC1 and the electrolytic capacitor EC2. The gate of the field effect transistor Q1 is connected to the gate of the field effect transistor Q2 through the resistor R1 and the resistor R2, the gate of the field effect transistor Q3 is connected to the gate of the field effect transistor Q4 through the resistor R3 and the resistor R4, the source of the field effect transistor Q1, the field effect transistor Q2, the field effect transistor Q4 and the field effect transistor Q4 are grounded, the drain of the field effect transistor Q1 is respectively connected to the drain of the field effect transistor Q2 and connected to the drain of the field effect transistor Q4 through the capacitor C1 and the resistor R7, the drain of the field effect transistor Q4 is connected to the drain of the field effect transistor Q4, and the drains of the field effect transistors Q2 and Q3 are connected to the input winding of the transformer T1.

[0056] The output winding of transformer T1 includes a high-voltage output winding and a low-voltage output winding. The low-voltage output winding is connected to the input end of the first rectifier bridge. The output end of the first rectifier bridge is used as a low-voltage direct current P15V output end through the electrolytic capacitor EC4, and then through the resistor 29 and the voltage regulator ZD2 as a low-voltage direct current P12V output end. The high-voltage output winding is connected to the input end of the second rectifier bridge. The output end of the second rectifier bridge is used as a high-voltage direct current P160V output end through the electrolytic capacitor EC5 and the capacitor C9.

[0057] like Figure 2 and Figure 4As shown, the input end of the AC output module 3 of the embodiment of the present application is connected to the high-voltage direct current P160V output end, and the output end includes the AC live wire ACL output end and the AC neutral wire ACN output end. The AC output module 3 includes a field effect tube Q10, a field effect tube Q11, a field effect tube Q12 and a field effect tube Q13. The high-voltage direct current P160V is converted into high-voltage alternating current through the field effect tube Q10 and the field effect tube Q11, and is output from the AC live wire ACL output end. The high-voltage direct current P160V is converted into high-voltage alternating current through the field effect tube Q12 and the field effect tube Q13, and is output from the AC neutral wire ACN output end. In the specific implementation process, the model of the field effect tube Q10, the field effect tube Q11, the field effect tube Q12 and the field effect tube Q13 is POP18N20. By changing the model of the field effect tube Q10, the field effect tube Q11, the field effect tube Q12 and the field effect tube Q13, the high-voltage alternating current power at the data of the AC output module 3 can be changed.

[0058] like Figure 2 and Figure 4 As shown, the frequency adjustment module 4 is connected to the low-voltage direct current P12V output terminal, the signal input terminal of the frequency adjustment module 4 is connected to the signal output terminal of the feedback protection module 5, and the frequency adjustment module 4 includes a sliding rheostat VR1, and the low-voltage direct current output frequency is adjusted by adjusting the resistance value of the sliding rheostat VR1.

[0059] like Figure 2 and Figure 5 As shown, the main control module 6 includes a main control chip IC1 and its peripheral circuits. The main control chip IC1 includes a PWMA control signal output pin PWM-A, a PWMB control signal output pin PWM-B, an AC feedback input pin INA-, INA+ and a DC feedback input pin. The PWMA control signal output pin PWM-A and the PWMB control signal output pin PWM-B are connected to the control signal input end of the high and low voltage power supply module 2. The AC feedback input pins INA-, INA+ and the DC feedback input pin are connected to the feedback protection module 5. In the specific implementation process, the main control chip IC1 adopts a PWM control chip of model SG3525A.

[0060] like Figure 2 and Figure 5As shown, the feedback protection module 5 includes a primary feedback submodule 51, a secondary feedback submodule 52, an AC feedback submodule 53 and a protection submodule 54. The input end of the protection submodule 54 is connected to the output end of the primary feedback submodule 51, the input end of the AC feedback submodule 53 is connected to the high-voltage AC output end, and the output end of the AC feedback submodule 53 is connected to the AC feedback input pins INA- and INA+ of the main control chip IC1 through the first optical coupler PC1. Since the optical coupler has a high-low voltage isolation function, the first optical coupler PC1 can isolate the high-voltage AC to prevent the high-voltage AC from affecting the main control chip IC1. The primary feedback submodule 51 includes a feedback protection chip IC2 and its peripheral circuits, the secondary feedback submodule 52 includes a feedback protection chip IC3 and its peripheral circuits, the feedback protection chip IC2 includes a primary feedback input pin IN+1 and primary feedback output pins OUT1 and OUT4, the feedback protection chip IC3 includes a secondary feedback output pin OUT4, the secondary feedback output pin OUT4 is connected to the primary feedback input pin IN+1 through the second optical coupler PC2, and the primary feedback output pins OUT1 and OUT4 are connected to the DC feedback input pin of the main control chip IC1. When the feedback protection chip IC2 detects that the current current or voltage fed back by the feedback protection chip IC1 is abnormal, the feedback protection chip IC2 performs power-off protection. In the specific implementation process, the feedback protection chip IC2 and the feedback protection chip IC3 use an operational amplifier chip of model LM324.

[0061] like Figure 2 and Figure 5 As shown, the feedback protection chip IC2 of the first-level feedback submodule 51 of the embodiment of the present application further includes a low-voltage protection output pin IN-2, a low-voltage warning output pin IN-3 and a high-voltage protection output pin IN+4, the low-voltage protection output pin IN-2 is connected to the low-voltage protection input terminal of the protection submodule 54, the low-voltage warning output pin IN-3 is connected to the low-voltage warning input terminal of the protection submodule 54, and the high-voltage protection output pin IN+4 is connected to the high-voltage protection input terminal of the protection submodule 54. The first-level feedback submodule 51 further includes a buzzer BZ1, which is connected to the buzzer control output pin OUT3 of the feedback protection chip IC2.

[0062] In a specific implementation process, when the voltage of the emergency power supply is too low or too high, the feedback protection chip IC2 implements low voltage protection and high voltage protection for the emergency power supply by controlling the protection submodule 54, and can give a prompt through the buzzer BZ1.

[0063] like Figure 2 and Figure 5As shown, the feedback protection chip IC3 of the secondary feedback submodule 52 of the embodiment of the present application also includes a PWM1 control signal output pin IN-2, a PWM2 control signal output pin IN-3, a PWMC control signal output pin OUT2, and a PWMD control signal output pin OUT3. The PWM1 control signal output pin IN-2 and the PWM2 control signal output pin IN-3 are connected to the signal input end of the frequency adjustment module 4, and the PWMC control signal output pin OUT2 and the PWMD control signal output pin OUT3 are connected to the signal input end of the AC output module 3.

[0064] like Figure 2 As shown, the AC output module 3 of the embodiment of the present application also includes a leakage feedback IFB input terminal. In the specific implementation process, when the leakage feedback IFB input terminal detects leakage current, the feedback protection chip IC3 controls the field effect transistor Q10, the field effect transistor Q11, the field effect transistor Q12 and the field effect transistor Q13 to be disconnected.

[0065] like Figure 2 and Figure 5 As shown, the input end of the AC feedback submodule 53 of the embodiment of the present application is respectively connected to the high-voltage DC P16V output end, the high-voltage AC ACL and ACN output ends, the low-voltage DC P12V output end and the IC3-10 pin of the feedback protection chip IC3, so as to detect the voltage conditions of the high-voltage DC P16V output end, the high-voltage AC ACL and ACN output ends, and the low-voltage DC P12V output end, and feed back the voltage conditions to the main control chip IC1 through the first optical coupler PC1. When it is detected that the current voltage is too high, the main control chip IC1 performs power-off protection.

[0066] The implementation principle of the embodiment of the present application is: multi-level feedback is formed by the main control chip IC1, the feedback protection chip IC2 and the feedback protection chip IC3. When dangerous situations such as overvoltage, overcurrent, overload and leakage occur, the feedback protection chip IC3 sends a feedback signal to the feedback protection chip IC2, and the feedback protection chip IC2 sends a feedback signal to the main control chip IC1 to cut off the output of the main control chip IC1 or the feedback protection chip IC2, thereby protecting the emergency power supply. Through the multi-level feedback method, the real-time and reliability of the feedback protection can be effectively improved.

[0067] like Figure 6 As shown, the embodiment of the present application also includes an inverter operation display module 7, and the input end of the inverter operation display module 7 is used to connect to the inverter INV. The inverter operation display module 7 includes a two-color light-emitting diode LED1, and the two-color light-emitting diode LED1 is used to display the working state of the inverter. In the specific implementation process, when the inverter is in a normal working state, the light-emitting diode LED1 emits green light, and when the inverter is in an abnormal working state, the light-emitting diode LED1 emits red light.

[0068] like Figure 6 As shown, it also includes a USB control module 8, the input end of the USB control module 8 is connected to the USB interface USB and the inverter interface INV, and a three-speed switch SW1 is provided to switch the USB output or the inverter output. The output end of the USB control module 8 is connected to the first output socket CN4 through the inverter working display module 7. The USB control module 8 includes a USB voltage regulator chip U2 and its peripheral circuits, which are used to step down and stabilize the voltage input by the USB interface to ensure the stability of the USB input. In the specific implementation process, the model of the USB voltage regulator chip U2 is MP1484.

[0069] The embodiments of this specific implementation are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. The same components are represented by the same figure marks. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An AC / DC emergency power supply control circuit, characterized in that: The invention comprises a power supply module (1), a high-low voltage power supply module (2), an AC output module (3), a feedback protection module (5) and a main control module (6); the output end of the power supply module (1) is connected to the input end of the high-low voltage power supply module (2); the power output by the power supply module (1) is transformed into high-voltage direct current and low-voltage direct current by the high-low voltage power supply module (2); The output end of the high-low voltage power supply module (2) comprises a high-voltage direct current output end and a low-voltage direct current output end, the high-voltage direct current output end is connected to the input end of the alternating current output module (3), the high-voltage direct current output by the high-low voltage power supply module (2) passes through the alternating current output module (3) to form high-voltage alternating current, and the output end of the alternating current output module (3) is a high-voltage alternating current output end; The main control module (6) comprises a main control chip IC1, the main control chip IC1 comprises a PWMA control signal output pin, a PWMB control signal output pin, an AC feedback input pin and a DC feedback input pin, the PWMA control signal output pin and the PWMB control signal output pin are connected to the control signal input end of the high and low voltage power supply module (2); The feedback protection module (5) comprises a primary feedback submodule (51), a secondary feedback submodule (52), an AC feedback submodule (53) and a protection submodule (54), wherein an input end of the protection submodule (54) is connected to an output end of the primary feedback submodule (51); The input end of the AC feedback submodule (53) is connected to the high-voltage AC output end, the output end of the AC feedback submodule (53) is connected to the AC feedback input pin of the main control chip IC1 through a first optical coupler, and the DC feedback input pin of the main control chip IC1 is sequentially connected to the primary feedback submodule (51) and the secondary feedback submodule (52); The primary feedback submodule (51) comprises a feedback protection chip IC2, the secondary feedback submodule (52) comprises a feedback protection chip IC3, the feedback protection chip IC2 comprises a primary feedback input pin and a primary feedback output pin, and the feedback protection chip IC3 comprises a secondary feedback output pin; The secondary feedback output pin is connected to the primary feedback input pin through a second optical coupler, and the primary feedback output pin is connected to a DC feedback input pin of the main control chip IC1.

2. An AC / DC emergency power supply control circuit according to claim 1, characterized in that: The feedback protection chip IC2 also includes a low voltage protection output pin, a low voltage warning output pin and a high voltage protection output pin, wherein the low voltage protection output pin is connected to the low voltage protection input end of the protection submodule (54), the low voltage warning output pin is connected to the low voltage warning input end of the protection submodule (54), and the high voltage protection output pin is connected to the high voltage protection input end of the protection submodule (54).

3. The AC / DC emergency power supply control circuit according to claim 1, characterized in that: It also includes a frequency adjustment module (4), wherein the frequency adjustment module (4) is connected to the low-voltage direct current output end, and the signal input end of the frequency adjustment module (4) is connected to the signal output end of the feedback protection module (5); The frequency adjustment module (4) comprises a sliding rheostat VR1, and the low-voltage direct current output frequency is adjusted by adjusting the resistance value of the sliding rheostat VR1.

4. The AC / DC emergency power supply control circuit according to claim 3, characterized in that: The feedback protection chip IC3 also includes a PWM1 control signal output pin, a PWM2 control signal output pin, a PWMC control signal output pin and a PWMD control signal output pin; The PWM1 control signal output pin and the PWM2 control signal output pin are connected to the signal input end of the frequency adjustment module (4), and the PWMC control signal output pin and the PWMD control signal output pin are connected to the signal input end of the AC output module (3).

5. The AC / DC emergency power supply control circuit according to claim 4, characterized in that: The output end of the AC output module (3) comprises an AC live wire output end and an AC neutral wire output end, and the AC output module (3) comprises a field effect transistor Q10, a field effect transistor Q11, a field effect transistor Q12 and a field effect transistor Q13; The high-voltage direct current output end is connected to the AC live wire output end of the AC output module (3) through a field effect transistor Q10 and a field effect transistor Q11; The high-voltage direct current output end is connected to the AC neutral line output end of the AC output module (3) through the field effect transistor Q12 and the field effect transistor Q13; The AC output module (3) further comprises a leakage feedback input terminal. When the leakage feedback input terminal detects a leakage current, the feedback protection chip IC3 controls the field effect transistor Q10, the field effect transistor Q11, the field effect transistor Q12 and the field effect transistor Q13 to be disconnected.

6. An AC / DC emergency power supply control circuit according to any one of claims 1 to 5, characterized in that: The high and low voltage power supply module (2) comprises a field effect transistor Q1, a field effect transistor Q2, a field effect transistor Q3, a field effect transistor Q4, a transformer T1, a first rectifier bridge and a second rectifier bridge, and the output end of the transformer T1 comprises a high voltage output winding and a low voltage output winding; The output end of the power module (1) and the control signal output end of the main control module (6) are connected to the input end of the transformer T1 through field effect transistors Q1, Q2, Q3 and Q4; The low-voltage output winding of the transformer T1 is connected to the input end of the first rectifier bridge, and the output end of the first rectifier bridge is a low-voltage direct current output end; The high-voltage output winding of the transformer T1 is connected to the input end of the second rectifier bridge, and the output end of the second rectifier bridge is a high-voltage direct current output end.

7. An AC / DC emergency power supply control circuit according to any one of claims 1 to 5, characterized in that: It also includes an inverter operation display module (7), wherein an input end of the inverter operation display module (7) is used to connect to an inverter; The inverter operation display module (7) comprises a two-color light emitting diode, and the two-color light emitting diode is used to display the working state of the inverter.

8. An AC / DC emergency power supply control circuit according to claim 7, characterized in that: It also comprises a USB control module (8), the input end of the USB control module (8) is connected to the USB interface and the inverter interface, and the output end of the USB control module (8) is connected to the first output socket via the inverter operation display module (7); The USB control module (8) comprises a USB voltage stabilizing chip U2 and its peripheral circuits.

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