CN216146147U - High-frequency online UPS power supply control circuit - Google Patents
High-frequency online UPS power supply control circuit Download PDFInfo
- Publication number
- CN216146147U CN216146147U CN202121989870.8U CN202121989870U CN216146147U CN 216146147 U CN216146147 U CN 216146147U CN 202121989870 U CN202121989870 U CN 202121989870U CN 216146147 U CN216146147 U CN 216146147U
- Authority
- CN
- China
- Prior art keywords
- triode
- comparator
- conversion
- module
- output end
- 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.)
- Active
Links
Images
Landscapes
- Inverter Devices (AREA)
Abstract
The utility model relates to the technical field of power supplies, in particular to a high-frequency online UPS power supply control circuit which comprises a mains supply detection module, a control module and a drive conversion module, wherein the output end of the mains supply detection module is connected with the control module, the drive conversion module comprises a trigger, a charging drive unit connected with the trigger and a discharging drive unit connected with the trigger, and the control module controls the charging drive unit and the discharging drive unit to be alternately conducted according to the detection result of the mains supply detection module. The high-frequency online UPS power supply control circuit controls the UPS power supply through the control signal with variable frequency and the push-pull driving mode, so that the UPS power supply can supply power uninterruptedly, the output power can be adjusted according to the control signal, the adjusting process is convenient, and the hardware structure cost of the UPS power supply is reduced.
Description
Technical Field
The utility model relates to the technical field of power supplies, in particular to a high-frequency online UPS power supply control circuit.
Background
The high-frequency online UPS (uninterruptible power supply) is an uninterruptible power supply with an energy storage device, is mainly used for providing equipment with higher requirements for power stability for parts, and has the following specific principle: when the commercial power is input normally, the UPS converts the commercial power rectified AC into DC, then the DC is inverted into AC and then the AC is supplied to the load for use, when the commercial power is abnormal, the commercial power is disconnected, and the UPS inverts the battery DC into DC boosted DC into AC to provide pure and qualified sine waves for the load to supply power to the load no matter how the commercial voltage and the waveform change. When the mains supply is normal, the battery is charged through a special charging plate.
The UPS control panel in the prior art has at least the following defects:
1. the charging of the existing high-frequency online UPS is an independent and special charging plate, the cost is increased along with the increase of power by adopting a switching power supply structure, the charging current is constant, and the charging is realized by the charging plates connected in parallel when a large-current charging scheme is realized, so that the time and the labor are wasted.
2. The existing high-frequency online UPS cannot adapt to the voltage of the lithium iron battery.
SUMMERY OF THE UTILITY MODEL
The present invention is directed to a high frequency online UPS power control circuit, which solves one or more of the problems of the prior art and provides at least one of the advantages of the present invention.
A high-frequency online UPS power supply control circuit comprises a mains supply detection module, a control module and a drive conversion module;
the output end of the commercial power detection module is connected with the control module;
when the commercial power detection module is connected with commercial power, the control module outputs a conduction pulse signal and a first conversion signal;
when the commercial power detection module is not connected with commercial power, the control module outputs a conduction pulse signal, a first conversion signal and a second conversion signal;
the drive conversion module includes:
the clock end of the trigger is connected with the control module, and the trigger alternately outputs a forward trigger signal and a reverse trigger signal when receiving the conduction pulse signal;
the charging driving unit is connected with the trigger and is provided with a first forward output end and a first reverse output end, the first forward output end is conducted when the forward trigger signal is received, and the first reverse output end is conducted when the reverse trigger signal is received;
the discharge driving unit is connected with the trigger and is provided with a second forward output end and a second reverse output end, the second forward output end is conducted when the forward trigger signal is received, and the second reverse output end is conducted when the reverse trigger signal is received;
the conversion unit is connected with the control module and provided with a first conversion end and a second conversion end, the first conversion end is connected with the charging driving unit, the second conversion end is connected with the discharging driving unit, when the conversion unit receives a first conversion signal, the conducted first forward output end and the conducted first reverse output end are grounded through the first conversion end respectively, and when the conversion unit receives a second conversion signal, the conducted second forward output end and the conducted second reverse output end are grounded through the second conversion end respectively.
Further, the charging driving unit comprises a first forward triode and a first backward triode, and the discharging driving unit comprises a second forward triode and a second backward triode;
the base electrode of the first forward triode is connected with the forward trigger end of the trigger, the base electrode of the first backward triode is connected with the backward trigger end of the trigger, and the emitting electrode of the first forward triode and the emitting electrode of the first backward triode are respectively communicated with the first conversion end;
the base electrode of the second forward triode is connected with the forward trigger end of the trigger, the base electrode of the second backward triode is connected with the backward trigger end of the trigger, and the emitting electrode of the second forward triode and the emitting electrode of the second backward triode are respectively communicated with the second conversion end.
Further, the conversion unit comprises a first conversion triode, a second conversion triode and a third conversion triode;
the base electrode of the first conversion triode is connected with the controller, and the collector electrode of the first conversion triode is respectively connected with the emitting electrode of the first forward triode and the emitting electrode of the first backward triode;
the base electrode of the second conversion triode is connected with the controller, and the collector electrode of the second conversion triode is respectively connected with the emitter electrode of the second forward triode and the emitter electrode of the second backward triode;
the base electrode of the third conversion triode is connected with the controller, the collector electrode of the third conversion triode is respectively connected with the emitting electrode of the first conversion triode and the emitting electrode of the second conversion triode, and the emitting electrode of the third conversion triode is grounded.
Further, the flip-flop is a JK flip-flop.
Further, the commercial power detection module is used for detecting the voltage of the live wire and the voltage of the zero line, and comprises a first comparator, a first resistor and a first capacitor;
the positive input end of the first comparator is used for accessing live wire voltage, the negative input end of the first comparator is used for accessing zero line voltage, the output end of the first comparator is connected with the control module, one end of the first resistor is connected with the output end of the first comparator, the other end of the first resistor is connected with the negative input end of the first comparator, and the first capacitor is connected with the first resistor in parallel.
Further, the high-frequency online UPS power supply control circuit also comprises a battery voltage detection module used for detecting the voltage of the positive electrode of the battery and the voltage of the negative electrode of the battery, wherein the battery voltage detection module comprises a second comparator, a second resistor and a second capacitor;
the positive input end of the second comparator is used for accessing the positive voltage of the battery, the negative input end of the second comparator is used for accessing the negative voltage of the battery, the output end of the second comparator is connected with the control module, one end of the second resistor is connected with the output end of the second comparator, the other end of the second resistor is connected with the negative input end of the second comparator, and the second capacitor is connected with the second resistor in parallel.
Further, the high-frequency online UPS power supply control circuit also comprises an input module;
the input module is connected with the control module, and the control module adjusts the frequency of the conduction pulse signal according to the input signal of the input module.
The dead zone generating module comprises a switch chip, a first dead zone triode, a second dead zone triode and a third dead zone triode;
two input ends of the switch chip are respectively connected with the control module, and the dead zone generation signal of the controller is received, so that two output ends of the switch chip are alternately output;
the base electrode of the first dead zone triode is connected with one output end of the switch chip, and the base electrode of the second dead zone triode is connected with the other output end of the switch chip;
the base electrode of the third dead zone triode is connected with the control module, the collector electrode of the third dead zone triode is respectively connected with the emitting electrode of the first dead zone triode and the emitting electrode of the second dead zone triode, and the emitting electrode of the third dead zone triode is grounded.
Further, the high-frequency online UPS power supply control circuit also comprises an inversion midpoint detection module used for detecting forward inversion midpoint voltage and reverse inversion midpoint voltage, wherein the inversion midpoint detection module comprises a first midpoint detection comparator, a second midpoint detection comparator, a fifth resistor, a sixth resistor, a seventh resistor, a fifth capacitor and a sixth capacitor;
the positive input end of the first midpoint detection comparator is used for accessing a forward inversion midpoint voltage, the negative input end of the first midpoint detection comparator is used for accessing a reverse inversion midpoint voltage, one end of a fifth resistor is connected with the output end of the first midpoint detection comparator, the other end of the fifth resistor is connected with the negative input end of the first midpoint detection comparator, a fifth capacitor is connected with the fifth resistor in parallel, and the output end of the first midpoint detection comparator is connected with the negative input end of the second midpoint detection comparator through a seventh resistor;
the positive input end of the second midpoint detection comparator is grounded, one end of a sixth resistor is connected with the output end of the second midpoint detection comparator, the other end of the sixth resistor is connected with the negative input end of the second midpoint detection comparator, a sixth capacitor is connected with the sixth resistor in parallel, and the output end of the second midpoint detection comparator is connected with the control module.
Further, the high-frequency online UPS power supply control circuit also comprises an overcurrent protection module used for detecting the inversion output signal, wherein the overcurrent protection module comprises a first overcurrent detection comparator, a second overcurrent detection comparator, an overcurrent light-emitting diode and a seventh capacitor;
the positive input end of the first over-current detection comparator is connected with a first direct-current signal, the negative input end of the first over-current detection comparator is used for being connected with an inversion output signal, and the output end of the first over-current detection comparator is connected with the positive input end of the second over-current detection comparator;
a positive input end of the second over-current detection comparator is connected with a second direct-current signal, a negative input end of the second over-current detection comparator is connected with the first direct-current signal, an output end of the second over-current detection comparator is connected with the controller, one end of a seventh capacitor is connected with the positive input end of the second over-current detection comparator, and the other end of the seventh capacitor is connected with an output end of the second over-current detection comparator;
the anode of the over-current light-emitting diode is connected with direct-current voltage, and the cathode of the over-current light-emitting diode is connected with the output end of the second over-current detection comparator.
The utility model has the beneficial effects that: the UPS power supply is controlled through the control signal with variable frequency and the push-pull driving mode, so that the UPS power supply can supply power uninterruptedly, the output power can be adjusted according to the control signal, the charging power can be close to the inversion power, the adjusting process is convenient, the hardware structure cost of the UPS power supply is reduced, and an independent and special charging panel is omitted.
Drawings
Fig. 1 is a functional block diagram of a high frequency online UPS power control circuit according to an embodiment.
Fig. 2 is a circuit schematic of a drive switching module in one embodiment.
Fig. 3 is a schematic circuit diagram of a mains detection module in an embodiment.
Fig. 4 is a circuit schematic of a battery voltage detection module in one embodiment.
FIG. 5 is a circuit schematic of a dead band generation module in one embodiment.
FIG. 6 is a circuit diagram of an inverting midpoint detection module in one embodiment.
Fig. 7 is a circuit schematic of an over-current protection module in an embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the present invention will be further described with reference to the embodiments and the accompanying drawings.
The embodiment provides a high-frequency online UPS power supply control circuit.
Referring to fig. 1, the high-frequency online UPS power control circuit at least includes a commercial power detection module 100, a control module 200 and a driving conversion module 300, and is used for controlling and monitoring the high-frequency online UPS power.
Specifically, the control module 200 is a single chip microcomputer, the output end of the commercial power detection module 100 is connected to the control module 200, and the signal principles of the commercial power detection module 100 and the control module 200 are as follows: the input end of the commercial power detection module 100 is connected to a commercial power when in use, the control module 200 monitors whether the input of the commercial power is normal through the commercial power detection module 100, when the commercial power detection module 100 is connected to the commercial power (the commercial power is normally supplied with power), the control module 200 outputs a conduction pulse signal and a first conversion signal, and when the commercial power detection module 100 is not connected to the commercial power (the commercial power is abnormally powered off), the control module 200 outputs the conduction pulse signal, the first conversion signal and a second conversion signal.
The pulse signal, the first conversion signal and the second conversion signal are applied to the driving conversion module 300 respectively.
Referring to fig. 1 again, the driving conversion module 300 includes a trigger 301, a charging driving unit 302, a discharging driving unit 303, and a conversion unit 304, and is configured to drive the high-frequency online UPS power supply according to an instruction of the control module 200, so as to implement an uninterruptible power supply function.
The flip-flop 301 has a clock terminal, a forward flip-flop terminal and a reverse flip-flop terminal, where CLK represents
The clock terminal, Q denotes a forward trigger terminal, Q denotes a reverse trigger terminal, the clock terminal is connected to the control module 200, when the clock terminal receives the on pulse signal, the forward trigger terminal outputs a forward trigger signal, the reverse trigger terminal outputs a reverse trigger signal, the forward trigger signal and the reverse trigger signal are alternately output, and the alternate output frequency is determined by the frequency of the on pulse signal.
In the present embodiment, the flip-flop 301 is a JK flip-flop.
The charging driving unit 302 is connected to the trigger 301, and the charging driving unit 302 has a first forward output terminal and a first reverse output terminal, and is turned on when receiving a forward trigger signal and turned on when receiving a reverse trigger signal.
The discharge driving unit 303 is connected to the trigger 301, and the discharge driving unit 303 has a second forward output terminal and a second reverse output terminal, and is turned on when receiving the forward trigger signal and is turned on when receiving the reverse trigger signal.
The converting unit 304 is connected to the control module 200, the converting unit 304 has a first converting end and a second converting end, the first converting end is connected to the charging driving unit 302, the second converting end is connected to the discharging driving unit 303, when the converting unit 304 receives a first converting signal, the conducted first forward output end and the conducted first reverse output end are grounded through the first converting end, respectively, and when the converting unit 304 receives a second converting signal, the conducted second forward output end and the conducted second reverse output end are grounded through the second converting end, respectively.
Specifically, under the combined action of a conduction pulse signal and a first conversion signal, a first forward output end and a first reverse output end are alternately conducted according to the frequency of the conduction pulse signal, and the first forward output end and the first reverse output end are both grounded through a first conversion end when conducted, so that the conducted first forward output end and the conducted first reverse output end are in a low level state, and a level signal change cannot occur when the second forward output end and the second reverse output end are conducted; on the contrary, under the combined action of the conduction pulse signal and the second conversion signal, the second forward output end and the second reverse output end are alternately conducted according to the frequency of the conduction pulse signal, the second forward output end and the second reverse output end are grounded through the second conversion end when conducted, so that the conducted second forward output end and the conducted second reverse output end are in a low level state, and the level signal change cannot occur when the first forward output end and the first reverse output end are conducted.
The high-frequency online UPS power control circuit of this embodiment controls the high-frequency online UPS power by the above control principle, and the controlled high-frequency online UPS power has a boost circuit, a charging inverter circuit, a discharging inverter circuit and a battery, wherein the charging inverter circuit includes a boost transformer, and an active driving charging circuit and a charging inverter connected to both sides of the boost transformer, the boost circuit is connected to commercial power, converts the commercial power into a dc high voltage and outputs the dc high voltage to the charging inverter, the active driving charging circuit has two active driving charging units capable of outputting a dc driving signal, the output terminals of the two active driving charging units are respectively connected to both ends of a primary winding of the boost transformer, one active driving charging unit is connected to a first forward output terminal, the other active driving charging unit is connected to a first reverse output terminal, the first forward output terminal and the first reverse output terminal are alternately grounded, the direct current driving signal of one of the active driving charging units is pulled down, the direct current driving signal of the other active driving charging unit is kept unchanged, so that the active driving charging circuit forms an alternating current driving signal, the driving signal is boosted by the boosting transformer to trigger the charging inverter to be alternately conducted, the direct current high voltage of the boosting circuit is converted into alternating current high voltage and is output to an external load, and a part of the alternating current high voltage is supplied to the battery for charging after passing through the transformer and the rectifying circuit.
The discharge inverter circuit comprises an active drive discharge circuit and a discharge electric inverter, wherein the active drive discharge circuit is provided with two active drive discharge units capable of outputting direct current drive signals, the output ends of the two active drive discharge units are respectively acted on the discharge inverter, the second forward output end is connected with one active drive discharge unit, and the second reverse output end is connected with the other active drive discharge unit. When the commercial power is abnormally cut off, the output voltage of the battery is output to the discharging electric inverter, the second forward output end and the second reverse output end are alternately grounded, the active driving discharging circuit forms an alternating current driving signal, the driving signal triggers the discharging inverter to be alternately conducted, the direct current voltage of the battery is converted into alternating current voltage, the alternating current voltage is output to the boosting circuit and is boosted by the boosting circuit and then output to the charging inverter, and at the moment, the alternating current voltage processed by the charging inverter is directly output to an external load and does not charge the battery any more.
The high-frequency online UPS power control circuit provided in this embodiment may further adjust and change the charging current by adjusting the frequency of the conduction pulse signal, and specifically, the control module 200 adjusts the frequency of the conduction pulse signal to make the frequency of the ac high voltage output by the charging inverter deviate from the set frequency of the transformer, so as to change the current output to the battery.
Referring to fig. 2, in an embodiment, the charging driving unit 302 includes a first forward transistor Q1 and a first backward transistor Q2, and the discharging driving unit 303 includes a second forward transistor Q3 and a second backward transistor Q4.
Specifically, the base of the first forward triode Q1 is connected to the forward trigger end of the flip-flop 301, the base of the first backward triode Q2 is connected to the backward trigger end of the flip-flop 301, and the emitter of the first forward triode Q1 and the emitter of the first backward triode Q2 are respectively connected to the first switch end; the base of the second forward triode Q3 is connected with the forward trigger end of the flip-flop 301, the base of the second backward triode Q4 is connected with the backward trigger end of the flip-flop 301, and the emitter of the second forward triode Q3 and the emitter of the second backward triode Q4 are respectively connected with the second switching end.
In this embodiment, the switching unit 304 includes a first switching transistor Q5, a second switching transistor Q6, and a third switching transistor Q7.
Specifically, the base of the first switching transistor Q5 is connected to the control module 200, and the collector of the first switching transistor Q5 is connected to the emitter of the first forward transistor Q1 and the emitter of the first backward transistor Q2, respectively; the base of the second switching transistor Q6 is connected to the control module 200, and the collector of the second switching transistor Q6 is connected to the emitter of the second forward transistor Q3 and the emitter of the second backward transistor Q4, respectively; the base of the third switching transistor Q7 is connected to the control module 200, the collector of the third switching transistor Q7 is connected to the emitter of the first switching transistor Q5 and the emitter of the second switching transistor Q6, respectively, and the emitter of the third switching transistor Q7 is grounded.
In the present embodiment, BUSPWM represents an on pulse signal, LOCK1 represents a first switching signal, LOCK2 represents a second switching signal, LOCK3 represents a ground signal, a collector of the first forward transistor Q1 serves as a first forward output terminal, a collector of the first backward transistor Q2 serves as a first backward output terminal, a collector of the second forward transistor Q3 serves as a second forward output terminal, a collector of the second backward transistor Q4 serves as a second backward output terminal, an emitter of the first switching transistor Q5 serves as a first switching terminal, and an emitter of the second switching transistor Q6 serves as a second switching terminal.
The conducting pulse signal is applied to the clock terminal of the flip-flop 301, so that the forward trigger terminal and the reverse trigger terminal of the flip-flop 301 alternately output high-level signals, the forward trigger terminal outputs high-level signals to conduct the first forward transistor Q1 and the second forward transistor Q3, the reverse trigger terminal outputs high-level signals to conduct the first backward transistor Q2 and the second backward transistor Q4, the first switching signal is used for conducting the first switching transistor Q5, the second switching signal is used for conducting the second switching transistor Q6, and the ground signal is used for conducting the third switching transistor Q7, so that the collector of the first forward transistor Q1, the collector of the first backward transistor Q2, the collector of the second forward transistor Q3, and the collector of the second backward transistor Q4 are grounded.
Referring to fig. 3, in an embodiment, the utility power detecting module 100 includes a first comparator U1, a first resistor R1, and a first capacitor C1 for detecting the live voltage and the neutral voltage.
Specifically, L represents a live wire, N represents a neutral wire, a positive input end of the first comparator U1 is used for accessing a live wire voltage, a negative input end of the first comparator U1 is used for accessing a neutral wire voltage, an output end of the first comparator U1 is connected with the control module 200, one end of the first resistor R1 is connected with an output end of the first comparator U1, the other end of the first resistor R1 is connected with a negative input end of the first comparator U1, and the first capacitor C1 is connected in parallel with the first resistor R1.
In this embodiment, the comparison function of the first comparator U1 is used to generate a standard square wave, the comparator outputs a high level in the positive half cycle of the ac power, and outputs a low level in the negative half cycle of the ac power, and the output square wave is output to the control module 200, the control module 200 can determine whether the power supply is normal according to the shape of the square wave, the first resistor R1 is used to feed back the output signal of the first comparator U1 to the negative input terminal of the first comparator U1, and the first capacitor C1 plays a role in filtering.
Referring to fig. 1 again, the control circuit of the high-frequency online UPS power supply according to this embodiment further includes a battery voltage detection module 400 for detecting the voltage of the positive electrode of the battery and the voltage of the negative electrode of the battery.
Referring to fig. 4, in an embodiment, the battery voltage detecting module 400 includes a second comparator U2, a second resistor R2, and a second capacitor C2.
Specifically, BATV + represents the positive voltage of the battery, BATV-represents the negative voltage of the battery, the positive input terminal of the second comparator U2 is used for accessing the positive voltage of the battery, the negative input terminal of the second comparator U2 is used for accessing the negative voltage of the battery, the output terminal of the second comparator U2 is connected with the control module 200, one end of the second resistor R2 is connected with the output terminal of the second comparator U2, the other end of the second resistor R2 is connected with the negative input terminal of the second comparator U2, and the second capacitor C2 is connected with the second resistor R2 in parallel.
In this embodiment, the standard square wave is generated by using the comparison function of the second comparator U2, the corresponding square wave is output according to the level rule of the battery positive voltage and the battery negative voltage, the output square wave is output to the control module 200, the control module 200 can determine whether the battery voltage is normal according to the shape of the square wave, the second resistor R2 is used for feeding back the output signal of the second comparator U2 to the negative input terminal of the second comparator U2, and the second capacitor C2 plays a role in filtering.
Referring to fig. 1 again, the high-frequency online UPS power control circuit according to this embodiment further includes an input module 500.
Specifically, the input module 500 is connected to the control module 200, and the control module 200 adjusts the frequency of the conduction pulse signal according to the input signal of the input module 500.
Referring again to fig. 1, the embodiment further includes a dead zone generation module 600.
Referring to fig. 5, in one embodiment, the dead band generation module 600 includes a switch chip U3, a first dead band transistor Q8, a second dead band transistor Q9, and a third dead band transistor Q10.
Specifically, two input ends of the switch chip U3 are respectively connected to the control module 200, and receive the dead zone generation signal of the control module 200, so that two output ends of the switch chip U3 alternately output; the base of the first dead-zone triode Q8 is connected with one output end of the switch chip U3, and the base of the second dead-zone triode Q9 is connected with the other output end of the switch chip U3; the base of the third dead-zone transistor Q10 is connected to the control module 200, the collector of the third dead-zone transistor Q10 is connected to the emitter of the first dead-zone transistor Q8 and the emitter of the second dead-zone transistor Q9, respectively, and the emitter of the third dead-zone transistor Q10 is grounded.
The dead zone generating module 600 is configured to avoid simultaneously conducting the upper and lower tubes of the same phase of the inverter, one of the upper and lower tubes is connected to the collector of the first dead zone transistor Q8, and the other is connected to the collector of the second dead zone transistor Q9, and the control module 200 alternately conducts the first dead zone transistor Q8 and the second dead zone transistor Q9 through the switch chip U3, and grounds the conducted first dead zone transistor Q8 or the conducted second dead zone transistor Q9 through the third dead zone transistor Q10.
Referring to fig. 1 again, the high-frequency online UPS power control circuit of the present embodiment further includes an inversion midpoint detection module 700 for detecting a forward inversion midpoint voltage and a reverse inversion midpoint voltage.
Referring to fig. 6, in an embodiment, the inverting midpoint detecting module 700 includes a first midpoint detecting comparator U4, a second midpoint detecting comparator U5, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, a fifth capacitor C5, and a sixth capacitor C6.
Specifically, a positive input end of the first midpoint detection comparator U4 is used for accessing a forward inversion midpoint voltage, a negative input end of the first midpoint detection comparator U4 is used for accessing a reverse inversion midpoint voltage, one end of a fifth resistor R5 is connected with an output end of the first midpoint detection comparator U4, the other end of the fifth resistor R5 is connected with a negative input end of the first midpoint detection comparator U4, a fifth capacitor C5 is connected in parallel with the fifth resistor R5, and an output end of the first midpoint detection comparator U4 is connected with a negative input end of the second midpoint detection comparator U5 through a seventh resistor R7; the positive input end of the second midpoint detection comparator U5 is grounded, one end of a sixth resistor R6 is connected with the output end of the second midpoint detection comparator U5, the other end of the sixth resistor R6 is connected with the negative input end of the second midpoint detection comparator U5, a sixth capacitor C6 is connected in parallel with the sixth resistor R6, and the output end of the second midpoint detection comparator U5 is connected with the control module 200.
The positive inversion midpoint voltage and the reverse inversion midpoint voltage respectively represent midpoint voltages in two directions of an alternating current output voltage of the inverter, a square wave about inverter output voltage midpoint detection is generated through twice comparison of a first midpoint detection comparator U4 and a second midpoint detection comparator U5, the control module 200 receives the square wave and corrects a sinusoidal pulse SPWM wave to ensure symmetry of an output voltage waveform, a fifth resistor R5 is used for feeding back an output signal of the first midpoint detection comparator U4 to a negative input end of the first midpoint detection comparator U4, a fifth capacitor C5 plays a role in filtering, a sixth resistor R6 is used for feeding back an output signal of the second midpoint detection comparator U5 to a negative input end of the second midpoint detection comparator U5, and a sixth capacitor C6 plays a role in filtering.
Referring to fig. 1 again, the high-frequency online UPS power control circuit of the present embodiment further includes an overcurrent protection module 800 for detecting the inverter output signal.
Referring to fig. 7, in an embodiment, the over-current protection module 800 includes a first over-current detection comparator U6, a second over-current detection comparator U7, an over-current light emitting diode LED1, and a seventh capacitor C7.
Specifically, a positive input end of the first over-current detection comparator U6 is connected to a first direct-current signal, a negative input end of the first over-current detection comparator U6 is used for connecting to an inverter output signal, and an output end of the first over-current detection comparator U6 is connected to a positive input end of the second over-current detection comparator U7; a positive input end of the second over-current detection comparator U7 is connected with a second direct-current signal, a negative input end of the second over-current detection comparator U7 is connected with a first direct-current signal, an output end of the second over-current detection comparator U7 is connected with the control module 200, one end of a seventh capacitor C7 is connected with a positive input end of the second over-current detection comparator U7, and the other end of the seventh capacitor C7 is connected with an output end of the second over-current detection comparator U7; the anode of the over-current light-emitting diode LED1 is connected with direct-current voltage, and the cathode of the over-current light-emitting diode LED1 is connected with the output end of the second over-current detection comparator U7.
In this embodiment, LCAD represents the inverted output signal, the first dc signal is +5V, and the second dc signal is + 12V. The inverted output signal is input to the negative input end of the first over-current detection comparator U6 after being subjected to voltage reduction, a waveform about the inverted output current is generated through two comparisons of the first over-current detection comparator U6 and the second over-current detection comparator U7, the control module 200 judges whether the inverter is subjected to over-current output according to whether a threshold about the waveform about the inverted output current exceeds a current threshold, when the inverted output signal is subjected to over-current, the first over-current detection comparator U6 outputs a low level, and an output signal of the second over-current detection comparator U7 is lower than a second direct-current signal, so that a voltage difference is formed between two ends of the over-current light emitting diode LED1, and the over-current light emitting diode LED1 is lightened.
Compared with the prior art, an independent special charging panel is omitted, when the commercial power of the conventional high-frequency online UPS is normal, the boosting high-frequency transformer of the battery does not work, the high-frequency online UPS power supply control circuit of the utility model fully utilizes the boosting high-frequency transformer of the battery, when the commercial power is normal, the boosting high-frequency transformer of the battery is utilized, high BUS voltage can pass through the boosting high-frequency transformer of the battery to reversely charge the battery, the bidirectional use of high-frequency high-voltage transformation is realized, the charging current is adjustable, and the charging power can be close to the inversion power because the inversion power is UPS power.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (10)
1. A high-frequency online UPS power supply control circuit is characterized by comprising a mains supply detection module, a control module and a drive conversion module;
the output end of the commercial power detection module is connected with the control module;
when the commercial power detection module is connected with commercial power, the control module outputs a conduction pulse signal and a first conversion signal;
when the commercial power detection module is not connected with commercial power, the control module outputs a conduction pulse signal, a first conversion signal and a second conversion signal;
the drive conversion module includes:
the clock end of the trigger is connected with the control module, and the trigger alternately outputs a forward trigger signal and a reverse trigger signal when receiving the conduction pulse signal;
the charging driving unit is connected with the trigger, is provided with a first forward output end and a first reverse output end, is switched on when receiving the forward trigger signal, and is switched on when receiving the reverse trigger signal;
the discharge driving unit is connected with the trigger, is provided with a second forward output end and a second reverse output end, is switched on when receiving the forward trigger signal, and is switched on when receiving the reverse trigger signal;
and the conversion unit is connected with the control module and provided with a first conversion end and a second conversion end, the first conversion end is connected with the charging drive unit, the second conversion end is connected with the discharging drive unit, the conversion unit receives the first conversion signal, the conducted first forward output end and the conducted first reverse output end are grounded through the first conversion end respectively, and the conversion unit receives the second conversion signal, the conducted second forward output end and the conducted second reverse output end are grounded through the second conversion end respectively.
2. The high frequency online UPS power control circuit of claim 1 wherein the charge drive unit comprises a first forward transistor and a first backward transistor, and the discharge drive unit comprises a second forward transistor and a second backward transistor;
the base electrode of the first forward triode is connected with the forward trigger end of the trigger, the base electrode of the first backward triode is connected with the backward trigger end of the trigger, and the emitting electrode of the first forward triode and the emitting electrode of the first backward triode are respectively communicated with the first conversion end;
the base electrode of the second forward triode is connected with the forward trigger end of the trigger, the base electrode of the second backward triode is connected with the backward trigger end of the trigger, and the emitting electrode of the second forward triode and the emitting electrode of the second backward triode are respectively communicated with the second conversion end.
3. The high frequency online UPS power control circuit of claim 2 wherein the switching unit comprises a first switching transistor, a second switching transistor, and a third switching transistor;
the base electrode of the first conversion triode is connected with the controller, and the collector electrode of the first conversion triode is respectively connected with the emitting electrode of the first forward triode and the emitting electrode of the first backward triode;
the base electrode of the second conversion triode is connected with the controller, and the collector electrode of the second conversion triode is respectively connected with the emitter electrode of the second forward triode and the emitter electrode of the second backward triode;
the base electrode of the third conversion triode is connected with the controller, the collector electrode of the third conversion triode is respectively connected with the emitting electrode of the first conversion triode and the emitting electrode of the second conversion triode, and the emitting electrode of the third conversion triode is grounded.
4. A high frequency online UPS power control circuit according to any of claims 1-3 where the flip-flop is a JK flip-flop.
5. The high-frequency online UPS power supply control circuit of claim 1, wherein the utility power detection module is used for detecting live line voltage and neutral line voltage, the utility power detection module comprises a first comparator, a first resistor and a first capacitor;
the positive input end of the first comparator is used for being connected with the live wire voltage, the negative input end of the first comparator is used for being connected with the zero wire voltage, the output end of the first comparator is connected with the control module, one end of the first resistor is connected with the output end of the first comparator, the other end of the first resistor is connected with the negative input end of the first comparator, and the first capacitor is connected with the first resistor in parallel.
6. The high-frequency online UPS power supply control circuit of claim 1, further comprising a battery voltage detection module for detecting a battery positive voltage and a battery negative voltage, the battery voltage detection module comprising a second comparator, a second resistor and a second capacitor;
the positive input end of the second comparator is used for being connected with the positive voltage of the battery, the negative input end of the second comparator is used for being connected with the negative voltage of the battery, the output end of the second comparator is connected with the control module, one end of the second resistor is connected with the output end of the second comparator, the other end of the second resistor is connected with the negative input end of the second comparator, and the second capacitor is connected with the second resistor in parallel.
7. The high frequency online UPS power control circuit of claim 1 further comprising an input module;
the input module is connected with the control module, and the control module adjusts the frequency of the conduction pulse signal according to the input signal of the input module.
8. The high frequency online UPS power supply control circuit of claim 1 further comprising a dead-zone generating module comprising a switching chip, a first dead-zone transistor, a second dead-zone transistor, and a third dead-zone transistor;
the two input ends of the switch chip are respectively connected with the control module, and the dead zone generation signal of the controller is received, so that the two output ends of the switch chip are alternately output;
the base electrode of the first dead-zone triode is connected with one output end of the switch chip, and the base electrode of the second dead-zone triode is connected with the other output end of the switch chip;
the base electrode of the third dead zone triode is connected with the control module, the collector electrode of the third dead zone triode is respectively connected with the emitter electrode of the first dead zone triode and the emitter electrode of the second dead zone triode, and the emitter electrode of the third dead zone triode is grounded.
9. The high-frequency online UPS power supply control circuit of claim 1, further comprising an inverting midpoint detection module for detecting a forward inverting midpoint voltage and a reverse inverting midpoint voltage, the inverting midpoint detection module comprising a first midpoint detection comparator, a second midpoint detection comparator, a fifth resistor, a sixth resistor, a seventh resistor, a fifth capacitor and a sixth capacitor;
the positive input end of the first midpoint detection comparator is used for accessing the forward inversion midpoint voltage, the negative input end of the first midpoint detection comparator is used for accessing the reverse inversion midpoint voltage, one end of the fifth resistor is connected with the output end of the first midpoint detection comparator, the other end of the fifth resistor is connected with the negative input end of the first midpoint detection comparator, the fifth capacitor is connected with the fifth resistor in parallel, and the output end of the first midpoint detection comparator is connected with the negative input end of the second midpoint detection comparator through the seventh resistor;
the positive input end of the second midpoint detection comparator is grounded, one end of the sixth resistor is connected with the output end of the second midpoint detection comparator, the other end of the sixth resistor is connected with the negative input end of the second midpoint detection comparator, the sixth capacitor is connected with the sixth resistor in parallel, and the output end of the second midpoint detection comparator is connected with the control module.
10. The high-frequency online UPS power supply control circuit of claim 1, further comprising an overcurrent protection module for detecting the inverter output signal, wherein the overcurrent protection module comprises a first overcurrent detection comparator, a second overcurrent detection comparator, an overcurrent light-emitting diode and a seventh capacitor;
the positive input end of the first over-current detection comparator is connected with a first direct-current signal, the negative input end of the first over-current detection comparator is used for being connected with the inversion output signal, and the output end of the first over-current detection comparator is connected with the positive input end of the second over-current detection comparator;
a positive input end of the second over-current detection comparator is connected with a second direct-current signal, a negative input end of the second over-current detection comparator is connected with a first direct-current signal, an output end of the second over-current detection comparator is connected with the controller, one end of the seventh capacitor is connected with the positive input end of the second over-current detection comparator, and the other end of the seventh capacitor is connected with an output end of the second over-current detection comparator;
and the anode of the over-current light-emitting diode is connected with direct-current voltage, and the cathode of the over-current light-emitting diode is connected with the output end of the second over-current detection comparator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121989870.8U CN216146147U (en) | 2021-08-23 | 2021-08-23 | High-frequency online UPS power supply control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121989870.8U CN216146147U (en) | 2021-08-23 | 2021-08-23 | High-frequency online UPS power supply control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216146147U true CN216146147U (en) | 2022-03-29 |
Family
ID=80807361
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121989870.8U Active CN216146147U (en) | 2021-08-23 | 2021-08-23 | High-frequency online UPS power supply control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216146147U (en) |
-
2021
- 2021-08-23 CN CN202121989870.8U patent/CN216146147U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| TWI373900B (en) | High efficiency charging circuit and power supplying system | |
| US10432018B2 (en) | Power supply bus circuit | |
| JP2011517846A (en) | Solar power ladder inverter | |
| CN101841188A (en) | Hybrid power supply uninterruptible inverted power supply of power feedback type optical network | |
| CN108075562B (en) | High-power portable electric equipment and power supply control device and method thereof | |
| JP3088554U (en) | Online uninterruptible power supply that generates sine wave output using a single power supply with lighting function | |
| WO2016112784A1 (en) | Uninterrupted power supply and control method thereof | |
| EP4262042A1 (en) | Energy storage system | |
| US11532938B2 (en) | Power supply circuit and inverter | |
| CN203466613U (en) | Household off-network light-storage supplementary electricity generation system compatible with multiple types of energy-storage systems | |
| CN216146147U (en) | High-frequency online UPS power supply control circuit | |
| CN115296536B (en) | Bidirectional DC-DC converter | |
| US9450453B2 (en) | Uninterruptible power supply system with energy feedback to chargers and sinusoidal output | |
| CN116365653A (en) | Power supply circuit, power conversion equipment and energy storage equipment | |
| CN116404690A (en) | Power supply circuit, control method of power supply circuit and energy storage inverter | |
| CN208028656U (en) | Based on solar powered uninterrupted accessory power supply control device | |
| CN116054598A (en) | Energy-storage type variable-frequency transmission device | |
| CN210724292U (en) | Lithium battery charger with multi-mode charging function | |
| CN211063405U (en) | Miniature uninterrupted power source converter | |
| CN206364570U (en) | One kind is based on monolithic processor controlled new energy inverter | |
| CN220964341U (en) | AC/DC power regulator | |
| CN213185487U (en) | Power circuit of photovoltaic inverter | |
| CN215871203U (en) | Alternating voltage switching output circuit | |
| RU2242833C1 (en) | Method for no-break power supply to computers or computer systems | |
| CN217956759U (en) | Charging circuit, charger and uninterrupted power supply |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |