CN210297565U - Alternating current-direct current wide input voltage regulating circuit and driver - Google Patents
Alternating current-direct current wide input voltage regulating circuit and driver Download PDFInfo
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- CN210297565U CN210297565U CN201921197346.XU CN201921197346U CN210297565U CN 210297565 U CN210297565 U CN 210297565U CN 201921197346 U CN201921197346 U CN 201921197346U CN 210297565 U CN210297565 U CN 210297565U
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Abstract
The utility model provides a wide input regulator circuit of alternating current-direct current, include: the voltage-reducing circuit comprises a rectification filter circuit, a voltage-reducing control circuit, a flyback control circuit and a flyback circuit; the input end of the rectification filter circuit is used for being electrically connected with a power supply, the input end of the voltage reduction circuit is electrically connected with the output end of the rectification filter circuit, the output end of the voltage reduction circuit is electrically connected with the input end of the flyback circuit, the flyback circuit is electrically connected with the flyback control circuit, the input end of the voltage reduction control circuit is electrically connected with the output end of the flyback circuit, the output end of the voltage reduction control circuit is electrically connected with the voltage reduction circuit, the voltage reduction control circuit is used for receiving an electric signal of the flyback circuit, and a control signal is sent to the voltage reduction circuit according to. Based on the utility model discloses, through add filter rectifier circuit at the preceding stage, change the alternating current into the direct current, stabilize voltage level at predetermineeing the within range through step-down circuit again, fly back the electric energy after the circuit will step down and keep apart and carry out stable output to consumer.
Description
Technical Field
The utility model relates to a wide input voltage regulation field, in particular to wide input voltage regulating circuit of alternating current-direct current and driver.
Background
In industrial application, alternating current and direct current lines with various voltage grades exist, equipment with different voltage grades is needed to meet different input voltages, and the equipment is incompatible with each other and causes difficulty in equipment safety and maintenance.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a wide input regulator circuit of alternating current-direct current and driver is applicable to the alternating current-direct current power supply occasion of multivoltage level.
The utility model discloses a first embodiment provides a wide input regulator circuit of alternating current-direct current, include: the voltage-reducing circuit comprises a rectification filter circuit, a voltage-reducing control circuit, a flyback control circuit and a flyback circuit;
the input end of the rectification filter circuit is used for being electrically connected with a power supply, the input end of the voltage reduction circuit is electrically connected with the output end of the rectification filter circuit, the output end of the voltage reduction circuit is electrically connected with the input end of the flyback circuit, the flyback circuit is electrically connected with the flyback control circuit, the input end of the voltage reduction control circuit is electrically connected with the output end of the flyback circuit, the output end of the voltage reduction control circuit is electrically connected with the voltage reduction circuit, the voltage reduction control circuit is used for receiving an electric signal of the flyback circuit, and sends a control signal to the voltage reduction circuit according to the electric signal.
Preferably, the rectifying and filtering circuit includes: the circuit comprises a fuse, a first piezoresistor, a first inductor, a second inductor, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a rectifier bridge and a second piezoresistor;
the first end of the first piezoresistor is electrically connected with the positive pole of a power supply through the fuse, the second end of the first piezoresistor is electrically connected with the negative pole of the power supply, the first capacitor is connected in parallel with the two ends of the first piezoresistor, the first end of the first capacitor is electrically connected with the first end of the second capacitor through the first inductor, the second end of the first capacitor is electrically connected with the second end of the second capacitor through the second inductor, the first end of the third capacitor is electrically connected with the first end of the second capacitor, the second end of the third capacitor is electrically connected with the first end of the fourth capacitor, the second end of the fourth capacitor is electrically connected with the second end of the second capacitor, the second end of the third capacitor is grounded, and the input end of the rectifier bridge is arranged at the two ends of the third capacitor and the fourth capacitor after being connected in series, the output end of the rectifier bridge is electrically connected with the first end of the second piezoresistor, the second end of the second piezoresistor is grounded through the fifth capacitor, and the second end of the second piezoresistor is electrically connected with the input end of the voltage reduction circuit.
Preferably, the step-down circuit includes: the first capacitor, the second capacitor, the third triode, the fourth diode and the fourth inductor are connected in series;
the first end of the sixth capacitor is electrically connected with the output end of the rectification filter circuit, the second end of the sixth capacitor is grounded, the collector electrode of the first triode is electrically connected with the first end of the sixth capacitor, the emitter electrode of the first triode is electrically connected with the first end of the third inductor, the second end of the third inductor is grounded through the seventh capacitor, the cathode of the first diode is electrically connected with the first end of the third inductor, the anode of the first diode is grounded, and the base electrode of the first triode is electrically connected with the output end of the voltage reduction control circuit.
Preferably, the flyback circuit includes: the circuit comprises a transformer, a second diode, an eighth capacitor, a first resistor, a second resistor and a second triode;
the first end of the primary winding of the transformer is electrically connected with the output end of the voltage reduction circuit, the second end of the primary winding of the transformer is electrically connected with the collector of the second triode, the emitter of the second triode is grounded through the first resistor, the first end of the secondary winding of the transformer is electrically connected with the anode of the second diode, the second end of the secondary winding of the transformer is grounded, the cathode of the second diode is grounded through the eighth capacitor, the second resistor is arranged at two ends of the eighth capacitor, and the base of the second diode is electrically connected with the output end of the flyback control circuit.
Preferably, the flyback control circuit includes: the fourth resistor, the fifth resistor, the ninth capacitor, the tenth capacitor, the third diode, the fourth diode and the flyback control chip;
a first end of a primary winding of the transformer is electrically connected with a reset end and a power input end of the flyback control chip, the power input end of the flyback control chip is electrically connected with a discharge end of the flyback control chip through the fourth resistor, the discharge end of the flyback control chip is electrically connected with an anode of the third diode, a cathode of the third diode is electrically connected with a trigger end of the flyback control chip, a trigger end of the flyback control chip is electrically connected with an anode of the fourth diode, a cathode of the fourth diode is electrically connected with the discharge end of the flyback control chip through the fifth resistor, a threshold end of the flyback control chip is electrically connected with a cathode of the fourth diode, an output end of the flyback control chip is electrically connected with a first end of the ninth capacitor, and a second end of the ninth capacitor is electrically connected with a first end of the tenth capacitor, the second end of the tenth capacitor is electrically connected with the anode of the fourth diode, and the control output end of the flyback control chip is electrically connected with the base electrode of the second triode.
Preferably, the model of the flyback control chip is NE 555.
A second embodiment of the present invention provides a driver, comprising the wide input rectifying regulator circuit as described above.
Based on the utility model discloses a wide input regulator circuit of alternating current-direct current and driver, through add filter rectifier circuit at the preceding stage, turn into the direct current with the alternating current, it is stable at the predetermined within range with the voltage level through the step-down circuit again, the electric energy after the circuit will step down is kept apart to the flyback circuit, flyback circuit output feedback signal of telecommunication to step-down control circuit, step-down control circuit is according to feedback signal of telecommunication output control signal to step-down circuit, the voltage size of adjustment step-down circuit output, and then control flyback control circuit is stabilized the power and is supplied power to the consumer in predetermineeing the within range.
Drawings
Fig. 1 is a schematic structural diagram of an ac/dc wide input voltage regulating circuit of the present invention;
fig. 2 is a schematic diagram of the rectifying and filtering circuit of the present invention;
FIG. 3 is a schematic diagram of the voltage step-down circuit of the present invention;
FIG. 4 is a schematic diagram of the voltage step-down circuit of the present invention;
fig. 5 is a schematic diagram of a flyback circuit of the present invention;
fig. 6 is a schematic diagram of the flyback control circuit of the present invention.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention are combined to clearly and completely describe the technical solutions of the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings.
The utility model discloses a wide input regulator circuit of alternating current-direct current and driver is applicable to the alternating current-direct current power supply occasion of multivoltage level.
Referring to fig. 1, a first embodiment of the present invention discloses an ac/dc wide input voltage regulating circuit, including: the voltage-reducing circuit comprises a rectification filter circuit 1, a voltage-reducing circuit 2, a voltage-reducing control circuit 5, a flyback control circuit 4 and a flyback circuit 3;
the input end of the rectification filter circuit 1 is used for being electrically connected with a power supply, the input end of the voltage reduction circuit 2 is electrically connected with the output end of the rectification filter circuit 1, the output end of the voltage reduction circuit 2 is electrically connected with the input end of the flyback circuit 3, the flyback circuit 3 is electrically connected with the flyback control circuit 4, the input end of the voltage reduction control circuit 5 is electrically connected with the output end of the flyback circuit 3, the output end of the voltage reduction control circuit 5 is electrically connected with the voltage reduction circuit 2, wherein the voltage reduction control circuit 2 is used for receiving an electric signal of the flyback circuit 3 and sending a control signal to the voltage reduction circuit according to the electric signal.
It should be noted that, the rectifier filter circuit 1 converts external alternating current and direct current of different levels into direct current of a certain voltage level, outputs the direct current to the voltage reduction circuit 2 for further voltage stabilization, and then the flyback circuit 3 performs isolation output, the flyback circuit 3 outputs a feedback electrical signal to the voltage reduction control circuit 5, the voltage reduction control circuit 5 outputs a control signal to the voltage reduction circuit 2 according to the feedback electrical signal, adjusts the voltage output by the voltage reduction circuit 2, and then controls the flyback control circuit 4 to stabilize a power supply within a preset range to supply power to an electric device, wherein the flyback circuit 3 is used for isolating a preceding-stage circuit.
In this embodiment, referring to fig. 2, the rectifying and filtering circuit 1 includes: the FUSE, the first piezoresistor MOV, the first inductor L1, the second inductor L2, the first capacitor C1, the second capacitor C2, the third capacitor C3, the fourth capacitor C4, the fifth capacitor C5, the rectifier bridge and the second piezoresistor NTC;
a first terminal of the first varistor MOV is electrically connected to a positive terminal of the power supply through the FUSE, a second terminal of the first varistor MOV is electrically connected to a negative terminal of the power supply, the first capacitor C1 is connected in parallel to both terminals of the first varistor MOV, a first terminal of the first capacitor C1 is electrically connected to a first terminal of the second capacitor C2 through the first inductor L1, a second terminal of the first capacitor C1 is electrically connected to a second terminal of the second capacitor C2 through the second inductor L2, a first terminal of the third capacitor C3 is electrically connected to a first terminal of the second capacitor C2, a second terminal of the third capacitor C3 is electrically connected to a first terminal of the fourth capacitor C4, a second terminal of the fourth capacitor C4 is electrically connected to a second terminal of the second capacitor C2, a second terminal of the third capacitor C3 is grounded, and an input terminal of the rectifier bridge is connected in series with both terminals of the third capacitor C3 and the fourth capacitor C4, the output end of the rectifier bridge is electrically connected with the first end of the second voltage dependent resistor NTC, the second end of the second voltage dependent resistor NTC is grounded through the fifth capacitor C5, and the second end of the second voltage dependent resistor NTC is electrically connected with the input end of the voltage reduction circuit 2.
It should be noted that the FUSE is used to prevent overcurrent and is blown out during overcurrent to avoid damage to a subsequent circuit, the first varistor MOV is used to suppress transient voltage and prevent overvoltage, the first capacitor C1 is used to stabilize voltage, the first inductor L1 and the second inductor L2 are used to suppress fluctuation of an ac power supply, the second capacitor C2 is used to suppress differential mode noise, the third capacitor C3 and the fourth capacitor C4 are used to suppress common mode noise, wherein the rectifier bridge is composed of four diodes and is used to convert dc power to ac power, the fifth capacitor C5 is used to filter after rectification, and the second varistor NTC is a varistor with a negative temperature coefficient and is used to reduce a surge current during startup.
In this embodiment, referring to fig. 3, the voltage-reducing circuit 2 includes: a sixth capacitor C6, a seventh capacitor C7, a first triode Q1, a first diode D1, and a third inductor L3;
the first end of the sixth capacitor C6 is electrically connected to the output end of the rectifying and filtering circuit 1, the second end of the sixth capacitor C6 is grounded, the collector of the first triode Q1 is electrically connected to the first end of the sixth capacitor C6, the emitter of the first triode D1 is electrically connected to the first end of the third inductor L3, the second end of the third inductor L3 is grounded through the seventh capacitor C7, the cathode of the first diode D1 is electrically connected to the first end of the third inductor L3, the anode of the first diode D1 is grounded, and the base of the first triode Q1 is electrically connected to the output end of the buck control circuit 5.
It should be noted that the third inductor L3 and the first diode D1 form a freewheeling circuit, the voltage-reducing circuit control circuit 5 dynamically outputs a PWM signal to control the on-off state of the first transistor Q1 in the voltage-reducing circuit by sampling and feeding back the output of the adapter power supply, so that the output of the voltage-reducing circuit changes, and the voltage-reducing control circuit 5 is as shown in fig. 4.
In this embodiment, referring to fig. 5, the flyback circuit 3 includes: the power supply comprises a transformer, a second diode D2, an eighth capacitor C8, a first resistor R1, a second resistor R2 and a second triode Q2;
a first end of a primary winding N1 of the transformer is electrically connected with an output end of the voltage reduction circuit 1, a second end of a primary winding N1 of the transformer is electrically connected with a collector of the second triode Q2, an emitter of the second triode Q2 is grounded through the first resistor, a first end of a secondary winding N2 of the transformer is electrically connected with a positive electrode of the second diode D2, a second end of a secondary winding N2 of the transformer is grounded, a negative electrode of the second diode D2 is grounded through the eighth capacitor C8, the second resistor R2 is arranged at two ends of the eighth capacitor C8, and a base of the second diode D2 is electrically connected with an output end of the flyback control circuit 1.
It should be noted that the eighth capacitor C8 is used for filtering, the first resistor R1 is used for protecting the second transistor Q2, the voltage transformer is used for isolating front and rear circuits, during the period when the second transistor Q2 is turned on, the input voltage is applied to the N1 winding, the input voltage is applied to the N1 winding, and the current i 1 flows through the N1 winding, so that induced electromotive forces of positive and negative polarities are generated at both ends of the winding. The two ends of the winding N2 are in the same name end relationship, and an induced electromotive force with the upper part negative and the lower part positive is generated. The anode voltage of the second diode D2 is lower than the cathode voltage, the second diode D2 is turned off, no current flows through the secondary side, the winding N2 and the second diode D2 form a loop and are in an open circuit state, and the winding N2 can be regarded as an energy storage inductor. When the second triode Q2 is switched from on to off, the current on the winding N1 becomes zero, the winding N2 outputs the magnetic field energy stored in the transformer, at this time, the voltage on the winding N2 is positive and negative, the voltage on the anode of the second diode D2 is higher than the voltage on the cathode and is switched on, and at this time, the flyback network outputs electric energy outwards.
In this embodiment, referring to fig. 6, the flyback control circuit 4 includes: a fourth resistor R4, a fifth resistor R5, a ninth capacitor C9, a tenth capacitor C10, a third diode D3, a fourth diode D4 and a flyback control chip;
a first end of a primary winding N1 of the transformer is electrically connected with a reset end and a power input end of the flyback control chip, the power input end of the flyback control chip is electrically connected with a discharge end of the flyback control chip through the fourth resistor R4, the discharge end of the flyback control chip is electrically connected with an anode of the third diode D3, a cathode of the third diode D3 is electrically connected with a trigger end of the flyback control chip, the trigger end of the flyback control chip is electrically connected with an anode of the fourth diode D4, a cathode of the fourth diode D4 is electrically connected with the discharge end of the flyback control chip through the fifth resistor R5, a threshold end of the flyback control chip is electrically connected with a cathode of the fourth diode D4, an output end of the flyback control chip is electrically connected with a first end of the ninth capacitor C9, and a second end of the ninth capacitor C9 is electrically connected with a first end of the tenth capacitor C10, a second end of the tenth capacitor C10 is electrically connected to the anode of the fourth diode D4, and a control output end of the flyback control chip is electrically connected to the base of the second transistor Q2. It should be noted that, the flyback control circuit is configured to output a PWM signal and is configured to control the conduction of the second transistor Q2, the capacitor C10, the resistors R4 and R5 are used as a timing element of the oscillator to determine the width of positive and negative pulses of an output rectangular wave, and the collector of the second transistor Q2 is configured to control the charging and discharging of the capacitor C10, so that the circuit generates periodic output pulses repeatedly, and of course, the size of the timing element of the oscillator may be changed according to actual situations, such as changing the size of the resistor and the capacitor, so that the duty ratio of the PWM signal is changed, which is not specifically limited herein.
In this embodiment, the model of the flyback control chip is NE 555. It should be noted that, other control chips may also be used, and the peripheral circuits may be correspondingly arranged according to the functions of the chips, which is not specifically limited herein, and these schemes are all within the protection scope of the present invention.
A second embodiment of the present invention discloses a driver, comprising a wide input rectification voltage regulation circuit as described above.
Based on the utility model discloses a wide input regulator circuit of alternating current-direct current and driver, through add filter rectifier circuit at the preceding stage, turn into the direct current with the alternating current, it is stable at the predetermined within range with the voltage level through the step-down circuit again, the electric energy after the circuit will step down is kept apart to the flyback circuit, flyback circuit output feedback signal of telecommunication to step-down control circuit, step-down control circuit is according to feedback signal of telecommunication output control signal to step-down circuit, the voltage size of adjustment step-down circuit output, and then control flyback control circuit is stabilized the power and is supplied power to the consumer in predetermineeing the within range.
Above only the utility model discloses an it is preferred embodiment, the utility model discloses a scope of protection not only limits in above-mentioned embodiment, and the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection.
Claims (7)
1. An AC/DC wide input voltage regulation circuit, comprising: the voltage-reducing circuit comprises a rectification filter circuit, a voltage-reducing control circuit, a flyback control circuit and a flyback circuit;
the input end of the rectification filter circuit is used for being electrically connected with a power supply, the input end of the voltage reduction circuit is electrically connected with the output end of the rectification filter circuit, the output end of the voltage reduction circuit is electrically connected with the input end of the flyback circuit, the flyback circuit is electrically connected with the flyback control circuit, the input end of the voltage reduction control circuit is electrically connected with the output end of the flyback circuit, the output end of the voltage reduction control circuit is electrically connected with the voltage reduction circuit, the voltage reduction control circuit is used for receiving an electric signal of the flyback circuit, and sends a control signal to the voltage reduction circuit according to the electric signal.
2. The ac-dc wide input voltage regulating circuit according to claim 1, wherein said rectifying and filtering circuit comprises: the circuit comprises a fuse, a first piezoresistor, a first inductor, a second inductor, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a rectifier bridge and a second piezoresistor;
the first end of the first piezoresistor is electrically connected with the positive pole of a power supply through the fuse, the second end of the first piezoresistor is electrically connected with the negative pole of the power supply, the first capacitor is connected in parallel with the two ends of the first piezoresistor, the first end of the first capacitor is electrically connected with the first end of the second capacitor through the first inductor, the second end of the first capacitor is electrically connected with the second end of the second capacitor through the second inductor, the first end of the third capacitor is electrically connected with the first end of the second capacitor, the second end of the third capacitor is electrically connected with the first end of the fourth capacitor, the second end of the fourth capacitor is electrically connected with the second end of the second capacitor, the second end of the third capacitor is grounded, and the input end of the rectifier bridge is arranged at the two ends of the third capacitor and the fourth capacitor after being connected in series, the output end of the rectifier bridge is electrically connected with the first end of the second piezoresistor, the second end of the second piezoresistor is grounded through the fifth capacitor, and the second end of the second piezoresistor is electrically connected with the input end of the voltage reduction circuit.
3. The ac-dc wide input voltage regulating circuit according to claim 1, wherein said voltage step-down circuit comprises: the first capacitor, the second capacitor, the third triode, the fourth diode and the fourth inductor are connected in series;
the first end of the sixth capacitor is electrically connected with the output end of the rectification filter circuit, the second end of the sixth capacitor is grounded, the collector electrode of the first triode is electrically connected with the first end of the sixth capacitor, the emitter electrode of the first triode is electrically connected with the first end of the third inductor, the second end of the third inductor is grounded through the seventh capacitor, the cathode of the first diode is electrically connected with the first end of the third inductor, the anode of the first diode is grounded, and the base electrode of the first triode is electrically connected with the output end of the voltage reduction control circuit.
4. The ac-dc wide input voltage regulator circuit of claim 1, wherein the flyback circuit comprises: the circuit comprises a transformer, a second diode, an eighth capacitor, a first resistor, a second resistor and a second triode;
the first end of the primary winding of the transformer is electrically connected with the output end of the voltage reduction circuit, the second end of the primary winding of the transformer is electrically connected with the collector of the second triode, the emitter of the second triode is grounded through the first resistor, the first end of the secondary winding of the transformer is electrically connected with the anode of the second diode, the second end of the secondary winding of the transformer is grounded, the cathode of the second diode is grounded through the eighth capacitor, the second resistor is arranged at two ends of the eighth capacitor, and the base of the second diode is electrically connected with the output end of the flyback control circuit.
5. The ac-dc wide input voltage regulator circuit according to claim 4, wherein said flyback control circuit comprises: the fourth resistor, the fifth resistor, the ninth capacitor, the tenth capacitor, the third diode, the fourth diode and the flyback control chip;
a first end of a primary winding of the transformer is electrically connected with a reset end and a power input end of the flyback control chip, the power input end of the flyback control chip is electrically connected with a discharge end of the flyback control chip through the fourth resistor, the discharge end of the flyback control chip is electrically connected with an anode of the third diode, a cathode of the third diode is electrically connected with a trigger end of the flyback control chip, a trigger end of the flyback control chip is electrically connected with an anode of the fourth diode, a cathode of the fourth diode is electrically connected with the discharge end of the flyback control chip through the fifth resistor, a threshold end of the flyback control chip is electrically connected with a cathode of the fourth diode, an output end of the flyback control chip is electrically connected with a first end of the ninth capacitor, and a second end of the ninth capacitor is electrically connected with a first end of the tenth capacitor, the second end of the tenth capacitor is electrically connected with the anode of the fourth diode, and the control output end of the flyback control chip is electrically connected with the base electrode of the second triode.
6. The AC-DC wide input voltage regulating circuit according to claim 5, wherein the type of the flyback control chip is NE 555.
7. A driver comprising the wide input rectifying regulator circuit of any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921197346.XU CN210297565U (en) | 2019-07-26 | 2019-07-26 | Alternating current-direct current wide input voltage regulating circuit and driver |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921197346.XU CN210297565U (en) | 2019-07-26 | 2019-07-26 | Alternating current-direct current wide input voltage regulating circuit and driver |
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| CN210297565U true CN210297565U (en) | 2020-04-10 |
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| CN201921197346.XU Expired - Fee Related CN210297565U (en) | 2019-07-26 | 2019-07-26 | Alternating current-direct current wide input voltage regulating circuit and driver |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021179920A1 (en) * | 2020-03-12 | 2021-09-16 | Oppo广东移动通信有限公司 | Power conversion circuit and power conversion method |
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2019
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021179920A1 (en) * | 2020-03-12 | 2021-09-16 | Oppo广东移动通信有限公司 | Power conversion circuit and power conversion method |
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