CN113381608B - Direct-current bidirectional source-mounted equipment switching control circuit - Google Patents
Direct-current bidirectional source-mounted equipment switching control circuit Download PDFInfo
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- CN113381608B CN113381608B CN202110652517.9A CN202110652517A CN113381608B CN 113381608 B CN113381608 B CN 113381608B CN 202110652517 A CN202110652517 A CN 202110652517A CN 113381608 B CN113381608 B CN 113381608B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
- H02M3/1582—Buck-boost converters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
- Amplifiers (AREA)
Abstract
The invention provides a direct-current bidirectional source-mounted equipment switching control circuit which comprises an operational amplifier K6, wherein the positive input end of the operational amplifier K6 is electrically connected with a bidirectional control circuit, the negative input end of the operational amplifier K6 is electrically connected with a sawtooth wave generating circuit, the output end of the operational amplifier K6 is electrically connected with the input ends of a dead zone circuit and a misdirection circuit, the PWM1 output end of the dead zone circuit and the misdirection circuit is electrically connected with the first input end of an MOS tube driving circuit, the second input end of the MOS tube driving circuit is electrically connected with the PWM2 output end of the dead zone circuit and the misdirection circuit, the bidirectional control circuit comprises a source mode current given circuit and a bidirectional current inner ring control circuit which is electrically connected with the source mode current given circuit, and the source mode current given circuit is electrically connected with a bidirectional voltage outer ring control circuit and a carrier mode current given circuit. The invention can realize the automatic switching of the source load of the direct current bidirectional power supply and the bidirectional source load constant voltage and constant current control loop.
Description
Technical Field
The invention relates to the technical field of switching control of direct-current bidirectional source-mounted equipment, in particular to a switching control circuit of direct-current bidirectional source-mounted equipment.
Background
The existing direct-current bidirectional power supply needs to be manually switched between a power supply mode and a load mode and cannot be seamlessly switched.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a direct-current bidirectional source-mounted equipment switching control circuit.
In order to achieve the purpose, the invention adopts the following technical scheme:
a direct-current bidirectional source-mounted equipment switching control circuit comprises an operational amplifier K6, wherein the positive electrode input end of the operational amplifier K6 is electrically connected with a bidirectional control circuit, the negative electrode input end of the operational amplifier K6 is electrically connected with a sawtooth wave generating circuit, the output end of the operational amplifier K6 is electrically connected with the input ends of a dead zone circuit and a misdirection circuit, the PWM1 output end of the dead zone circuit and the misdirection circuit is electrically connected with the first input end of a MOS tube driving circuit, and the second input end of the MOS tube driving circuit is electrically connected with the PWM2 output end of the dead zone circuit and the misdirection circuit;
the bidirectional control circuit comprises a source mode current given circuit and a bidirectional current inner ring control circuit electrically connected with the source mode current given circuit, and the source mode current given circuit is electrically connected with a bidirectional voltage outer ring control circuit and a load mode current given circuit.
Preferably, the source mode current setting circuit includes an operational amplifier K2, a negative input end of the operational amplifier K2 is electrically connected to one end of a resistor R7 and one end of a resistor R6, the other end of the resistor R7 is grounded, a positive input end of the operational amplifier K2 is electrically connected to one end of the resistor R8, the other end of the resistor R8 is electrically connected to an active mode current setting signal Iref1, an output end of the operational amplifier K2 is electrically connected to a negative electrode of a diode D1, and a positive electrode of a diode D1 is electrically connected to the other end of the resistor R6.
Preferably, the bidirectional current inner loop control circuit includes an operational amplifier K4, a negative input end of the operational amplifier K4 Is electrically connected to one end of a resistor R9 and one end of a capacitor C2, the other end of the resistor R9 Is electrically connected to an input and output current signal Is, the other end of the capacitor C2 Is electrically connected to an output end of the operational amplifier K4, one end of a resistor R11 and an anode of a diode D3, the other end of the resistor R11 Is electrically connected to one end of a resistor R13 and a negative input end of an operational amplifier K5, the other end of the resistor R13 Is electrically connected to an output end of the operational amplifier K5 and an anode of a diode D4, a negative electrode of the diode D4 Is electrically connected to a negative electrode of a diode D3 and an anode input end of the operational amplifier K6, an anode input end of the operational amplifier K5 Is electrically connected to one end of a resistor R12, the other end of the resistor R12 Is grounded, an anode input end of an operational amplifier K4 Is electrically connected to one end of a resistor R10, the other end of the resistor R10 is electrically connected to the anode of the diode D1.
Preferably, the bidirectional voltage outer loop control circuit includes an operational amplifier K1, a negative input end of the operational amplifier K1 is electrically connected to one end of a resistor R1 and one end of a capacitor C1, the other end of the resistor R1 is electrically connected to an output voltage sampling signal Vout, the other end of the capacitor C1 is electrically connected to one end of the resistor R3 and an anode of a diode D1, the other end of the resistor R3 is electrically connected to an output end of the operational amplifier K1, an anode input end of the operational amplifier K1 is electrically connected to one end of a resistor R2, and the other end of the resistor R2 is electrically connected to an output voltage given signal Vref.
Preferably, the load-mode current setting circuit includes an operational amplifier K3, a negative input terminal of the operational amplifier K3 is electrically connected to one end of a resistor R4 and one end of a resistor R14, the other end of the resistor R4 is electrically connected to a load-mode current setting signal Iref2, a positive input terminal of the operational amplifier K3 is electrically connected to one end of a resistor R5, the other end of the resistor R5 is grounded, an output terminal of the operational amplifier K3 is electrically connected to a positive electrode of a diode D2, and a negative electrode of the diode D2 is electrically connected to the other end of a resistor R14 and a positive electrode of a diode D1.
Compared with the prior art, the invention can realize the automatic switching of the source load of the direct current bidirectional power supply and the bidirectional source load constant voltage and constant current control loop.
Drawings
Fig. 1 is a system connection diagram of a dc bidirectional source-mounted device switching control circuit according to the present invention;
fig. 2 is a circuit diagram of a bidirectional control circuit in a dc bidirectional source-mounted device switching control circuit according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Referring to fig. 1-2, a dc bidirectional source-mounted device switching control circuit includes an operational amplifier K6, a positive input terminal of the operational amplifier K6 is electrically connected to a bidirectional control circuit, a negative input terminal of the operational amplifier K6 is electrically connected to a sawtooth wave generating circuit, an output terminal of the operational amplifier K6 is electrically connected to an input terminal of a dead zone and misdirection circuit, a PWM1 output terminal of the dead zone and misdirection circuit is electrically connected to a first input terminal of a MOS transistor driving circuit, and a second input terminal of the MOS transistor driving circuit is electrically connected to a PWM2 output terminal of the dead zone and misdirection circuit;
the bidirectional control circuit comprises a source mode current given circuit and a bidirectional current inner ring control circuit electrically connected with the source mode current given circuit, and the source mode current given circuit is electrically connected with a bidirectional voltage outer ring control circuit and a load mode current given circuit;
the source mode current setting circuit comprises an operational amplifier K2, wherein the negative electrode input end of the operational amplifier K2 is electrically connected with one end of a resistor R7 and one end of a resistor R6, the other end of the resistor R7 is grounded, the positive electrode input end of the operational amplifier K2 is electrically connected with one end of the resistor R8, the other end of the resistor R8 is electrically connected with an active mode current setting signal Iref1, the output end of the operational amplifier K2 is electrically connected with the negative electrode of a diode D1, and the positive electrode of a diode D1 is electrically connected with the other end of the resistor R6;
the bidirectional current inner loop control circuit comprises an operational amplifier K4, wherein the negative electrode input end of the operational amplifier K4 Is electrically connected with one end of a resistor R9 and one end of a capacitor C2, the other end of a resistor R9 Is electrically connected with an input and output current signal Is, the other end of a capacitor C2 Is electrically connected with the output end of the operational amplifier K4, one end of a resistor R11 and the anode of a diode D3, the other end of the resistor R11 Is electrically connected with one end of a resistor R13 and the negative electrode input end of an operational amplifier K5, the other end of the resistor R13 Is electrically connected with the output end of the operational amplifier K5 and the anode of a diode D4, the cathode of the diode D4 Is electrically connected with the cathode of a diode D3 and the anode input end of an operational amplifier K6, the anode input end of the operational amplifier K5 Is electrically connected with one end of a resistor R12, the other end of the resistor R12 Is grounded, the anode input end of an operational amplifier K4 Is electrically connected with one end of a resistor R10, the other end of the resistor R10 is electrically connected with the anode of the diode D1;
the bidirectional voltage outer ring control circuit comprises an operational amplifier K1, wherein the negative electrode input end of the operational amplifier K1 is electrically connected with one end of a resistor R1 and one end of a capacitor C1, the other end of a resistor R1 is electrically connected with an output voltage sampling signal Vout, the other end of a capacitor C1 is electrically connected with one end of the resistor R3 and the anode of a diode D1, the other end of the resistor R3 is electrically connected with the output end of the operational amplifier K1, the anode input end of the operational amplifier K1 is electrically connected with one end of a resistor R2, and the other end of the resistor R2 is electrically connected with an output voltage given signal Vref;
the load mode current setting circuit comprises an operational amplifier K3, wherein the negative electrode input end of the operational amplifier K3 is electrically connected with one end of a resistor R4 and one end of a resistor R14, the other end of a resistor R4 is electrically connected with a load mode current setting signal Iref2, the positive electrode input end of the operational amplifier K3 is electrically connected with one end of a resistor R5, the other end of the resistor R5 is grounded, the output end of the operational amplifier K3 is electrically connected with the positive electrode of a diode D2, and the negative electrode of a diode D2 is electrically connected with the other end of a resistor R14 and the positive electrode of a diode D1.
In this embodiment, the bidirectional voltage outer-loop control circuit is composed of an operational amplifier K1, a resistor R1, a resistor E2, a resistor R3 and a capacitor C1, an output voltage sampling signal Vout and an output voltage given signal Vref are respectively connected to a negative input end and a positive input end of the operational amplifier K1, and the operational amplifier K1 outputs a voltage outer-loop control error signal T _ error 1;
the source mode current setting circuit consists of an operational amplifier K2, a resistor R6, a resistor R7, a resistor R8 and a diode D1, and a source mode current setting signal Iref1 is connected with a voltage outer loop control error signal T _ error1 through the operational amplifier K2 and the diode D1;
the load mode current setting circuit consists of an operational amplifier K3, a resistor R4, a resistor R5, a resistor R14 and a diode D2, and a load mode current setting signal Iref2 is connected with a voltage outer loop control error signal T _ error1 through the operational amplifier K3 and the diode D2;
the bidirectional current inner loop control circuit consists of an operational amplifier K4, an operational amplifier K5, a diode D3, a diode D4, a resistor R9, a resistor R10, a resistor R11, a resistor R12, a resistor R13 and a capacitor C2, a voltage outer loop control error signal T _ error1, an input current signal Is and an output current signal Is are connected to the input end of an operational amplifier K4, and the output end of the operational amplifier K4 Is a total voltage outer loop control error signal T _ error 2;
when the DC bidirectional source-carried equipment Is in a power supply mode, when the output voltage sampling signal Vout Is less than or equal to the output voltage given signal Vref, the voltage outer-loop control error signal T _ error1 Is positive, the error amount of the voltage outer-loop control error signal T _ error1 Is determined together with the source-mode current given circuit, meanwhile, because the voltage outer-loop control error signal T _ error1 Is positive, the diode D2 in the load-mode current given circuit blocks the output of the operational amplifier K3, so the power supply mode does not work, when the source-mode current given signal Iref1 Is larger than the input and output current signals, the power supply mode Is in constant voltage output, when the source-mode current given signal Iref1 Is equal to the input and output current signals Is, the power supply mode Is in constant current output, the voltage outer-loop control error signal T _ error1 Is amplified with the input and output current signals Is through the operational amplifier K4 in the bidirectional current inner-loop control circuit and the diode D3 generates the total voltage outer-loop control error for controlling the output voltage and output current The signal T _ error2, and the diode D4 also blocks the reverse operational amplifier output of the operational amplifier K5, without affecting the total voltage outer ring control error signal T _ error2, the total voltage outer ring control error signal T _ error2 is compared with sawtooth waves to obtain a Mos tube control duty ratio signal, two paths of PWM1 and PWM2 are generated through a dead zone and a phase error circuit, a Drv1 signal and a Drv2 signal are obtained through a MOS tube driving circuit, and the Drv1 signal and the Drv2 signal drive a Mos switch, so that the output work of the BUCK-BOOST bidirectional power converter is controlled;
in the load mode, as long as the output voltage sampling signal Vout Is greater than the output voltage given signal Vref, the energy Is converted from output to input, the input and output current signals Is are converted from output to input, the direction Is changed from positive to negative, the voltage outer loop control error signal T _ error1 Is also changed into negative, the error amount of the voltage outer loop control error signal T _ error1 Is determined by the voltage outer loop control error signal T _ error1 and the diode D1 in the source mode current given circuit blocks the output of the operational amplifier K2, and the load mode current given signal Iref2 Is greater than the absolute value of the input and output current signals Is, the load mode Is in constant voltage input, the load mode Is in constant current input when the load mode current given signal Iref2 Is equal to the absolute value of the input and output current signals Is, the voltage outer loop control error signal T _ error1 Is further connected with the input and output, The output current signal Is generates a total voltage outer ring control error signal T _ error2 for controlling the input voltage and the input current through an operational amplifier K4 operational amplifier, an operational amplifier K5 reverse operational amplifier and a diode D4 in a bidirectional current inner ring control circuit, meanwhile, the diode D3 also blocks the operational amplifier output of the operational amplifier K4, the total voltage outer ring control error signal T _ error2 Is not influenced, the total voltage outer ring control error signal T _ error2 Is compared with a sawtooth wave to obtain a Mos tube control duty ratio signal, two paths of PWM1 and PWM2 are generated through a dead zone and an error phase circuit, a Drv1 signal and a Drv2 signal are obtained through a driving circuit, and the Drv1 signal and the Drv2 signal drive a Mos switch, so that the input work of the BUCK-BOOST bidirectional power converter Is controlled;
when the output voltage sampling signal Vout is greater than the output voltage given signal Vref, the bidirectional control circuit automatically enters a load mode, and the direct-current bidirectional source load equipment is in a constant-voltage or constant-current mode by adjusting the value of a load mode current given signal Iref 2;
when the output voltage sampling signal Vout is less than or equal to the output voltage given signal Vref, the bidirectional control circuit automatically enters a power supply mode, and the direct current bidirectional source-carried equipment is in a constant current or constant current mode by adjusting the value of the source mode current given signal Iref 1.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (3)
1. A direct-current bidirectional source-mounted equipment switching control circuit comprises an operational amplifier K6 and is characterized in that a positive input end of an operational amplifier K6 is electrically connected with a bidirectional control circuit, a negative input end of the operational amplifier K6 is electrically connected with a sawtooth wave generating circuit, an output end of the operational amplifier K6 is electrically connected with an input end of a dead zone and misdirection circuit, a PWM1 output end of the dead zone and misdirection circuit is electrically connected with a first input end of an MOS tube driving circuit, and a second input end of the MOS tube driving circuit is electrically connected with a PWM2 output end of the dead zone and misdirection circuit;
the bidirectional control circuit comprises a source mode current given circuit and a bidirectional current inner ring control circuit electrically connected with the source mode current given circuit, and the source mode current given circuit is electrically connected with a bidirectional voltage outer ring control circuit and a load mode current given circuit;
the source mode current setting circuit comprises an operational amplifier K2, wherein the negative electrode input end of the operational amplifier K2 is electrically connected with one end of a resistor R7 and one end of a resistor R6, the other end of the resistor R7 is grounded, the positive electrode input end of the operational amplifier K2 is electrically connected with one end of the resistor R8, the other end of the resistor R8 is electrically connected with an active mode current setting signal Iref1, the output end of the operational amplifier K2 is electrically connected with the negative electrode of a diode D1, and the positive electrode of a diode D1 is electrically connected with the other end of the resistor R6;
the load mode current setting circuit comprises an operational amplifier K3, wherein the negative electrode input end of the operational amplifier K3 is electrically connected with one end of a resistor R4 and one end of a resistor R14, the other end of the resistor R4 is electrically connected with a load mode current setting signal Iref2, the positive electrode input end of the operational amplifier K3 is electrically connected with one end of a resistor R5, the other end of the resistor R5 is grounded, the output end of the operational amplifier K3 is electrically connected with the positive electrode of a diode D2, and the negative electrode of a diode D2 is electrically connected with the other end of a resistor R14 and the positive electrode of a diode D1.
2. The switching control circuit of claim 1, wherein the bidirectional current inner loop control circuit comprises an operational amplifier K4, a negative input terminal of the operational amplifier K4 Is electrically connected to one terminal of a resistor R9 and one terminal of a capacitor C2, the other terminal of the resistor R9 Is electrically connected to the input and output current signals Is, the other terminal of the capacitor C2 Is electrically connected to an output terminal of the operational amplifier K4, one terminal of a resistor R11 and an anode of a diode D3, the other terminal of the resistor R11 Is electrically connected to one terminal of a resistor R13 and a negative input terminal of an operational amplifier K5, the other terminal of the resistor R13 Is electrically connected to an output terminal of the operational amplifier K5 and an anode of a diode D4, the cathode of the diode D4 Is electrically connected to a cathode of a diode D3 and an anode input terminal of the operational amplifier K6, the anode input terminal of the operational amplifier K5 Is electrically connected to one terminal of a resistor R12, the other end of the resistor R12 is grounded, the anode input end of the operational amplifier K4 is electrically connected with one end of a resistor R10, and the other end of the resistor R10 is electrically connected with the anode of the diode D1.
3. The switching control circuit of claim 1, wherein the bidirectional voltage outer loop control circuit comprises an operational amplifier K1, a negative input terminal of the operational amplifier K1 is electrically connected to one end of a resistor R1 and one end of a capacitor C1, the other end of the resistor R1 is electrically connected to the output voltage sampling signal Vout, the other end of the capacitor C1 is electrically connected to one end of the resistor R3 and an anode of a diode D1, the other end of the resistor R3 is electrically connected to an output terminal of the operational amplifier K1, an anode input terminal of the operational amplifier K1 is electrically connected to one end of a resistor R2, and the other end of the resistor R2 is electrically connected to the output voltage setting signal Vref.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110652517.9A CN113381608B (en) | 2021-06-11 | 2021-06-11 | Direct-current bidirectional source-mounted equipment switching control circuit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110652517.9A CN113381608B (en) | 2021-06-11 | 2021-06-11 | Direct-current bidirectional source-mounted equipment switching control circuit |
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| CN113381608A CN113381608A (en) | 2021-09-10 |
| CN113381608B true CN113381608B (en) | 2022-05-03 |
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| CN117375388B (en) * | 2023-09-26 | 2024-06-14 | 山东艾诺智能仪器有限公司 | Self-adaptive over-power protection circuit |
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| CN101398447B (en) * | 2008-10-30 | 2011-03-30 | 上海大学 | Zero-crossing detector, edge-impulse transferor and use thereof |
| CN101707315B (en) * | 2009-12-01 | 2012-04-25 | 西安终南信息技术有限公司 | Multipurpose serial converter |
| CN104158405A (en) * | 2014-08-25 | 2014-11-19 | 东南大学 | Two-way DC/DC converter for micro-grid and magnetic bias digital suppression method |
| JP6665821B2 (en) * | 2017-03-30 | 2020-03-13 | オムロン株式会社 | Bidirectional DC-DC converter |
| CN108574411B (en) * | 2018-05-22 | 2020-04-17 | 安徽工业大学 | Dual-port stable control method and control circuit for bidirectional DC/DC power converter |
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