CN111092556A - High-voltage power supply - Google Patents
High-voltage power supply Download PDFInfo
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- CN111092556A CN111092556A CN201911347099.1A CN201911347099A CN111092556A CN 111092556 A CN111092556 A CN 111092556A CN 201911347099 A CN201911347099 A CN 201911347099A CN 111092556 A CN111092556 A CN 111092556A
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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
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33569—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/10—Regulating voltage or current
- G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is dc
- G05F1/461—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using an operational amplifier as final control device
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/10—Regulating voltage or current
- G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is dc
- G05F1/468—Regulating voltage or current wherein the variable actually regulated by the final control device is dc characterised by reference voltage circuitry, e.g. soft start, remote shutdown
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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
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/06—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes without control electrode or semiconductor devices without control electrode
-
- 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
- H02M1/0083—Converters characterised by their input or output configuration
- H02M1/009—Converters characterised by their input or output configuration having two or more independently controlled outputs
Abstract
The invention discloses a high-voltage power supply, which comprises an anti-interference circuit, an adjusting circuit, a power conversion and transformer booster circuit, an error amplifying circuit, a voltage-multiplying rectification RC filter circuit, a sampling circuit, a reference circuit and a control circuit, wherein the anti-interference circuit is connected with the adjusting circuit; the regulating circuit is connected with the power conversion and transformer booster circuit, the error amplifying circuit and the anti-interference circuit, the voltage-multiplying rectification RC filter circuit is connected with the sampling circuit and the power conversion and transformer booster circuit, and the error amplifying circuit is connected with the reference circuit, the control circuit and the sampling circuit. Has the advantages that: on the basis of the existing self-excitation push-pull conversion circuit, the high-voltage power supply provided by the invention is additionally provided with the auxiliary function circuit to optimize the performance of the transformer self-excitation push-pull conversion circuit and calculate and select the optimal parameters of the direct-current low-voltage supplied to the power conversion and transformer booster circuit, so that the high-voltage stabilized power supply with high precision, low drift, low ripple and quick response is realized, and the practicability is good.
Description
Technical Field
The invention relates to the field of switching power supplies, in particular to a high-voltage power supply.
Background
The switching power supply is also called a conversion power supply, and is a power supply which utilizes the modern power electronic technology to control the on-off time ratio of a switching tube and maintain stable output voltage. The high-voltage power supply belongs to a special power supply in the field of power supplies, has a plurality of application fields, and is widely used in various working fields such as gas discharge, high-voltage electrostatic fields, electron and ion accelerators and the like at present.
With the development of social economy, the performance requirements of the market on a high-voltage power supply are higher and higher, and a high-voltage stabilized power supply with high precision, low ripple, low drift and quick response tends to be great, however, the high-voltage power supply commonly used in the market at present has the problems of low precision, high drift, high ripple, low influence speed and the like, so that the improvement of the existing high-voltage power supply is necessary.
Disclosure of Invention
The present invention is directed to provide a high voltage power supply to solve the above problems, so as to solve the problems of low precision, high drift, high ripple, and low influence speed of the high voltage power supply in the prior art. On the basis of the existing self-excitation push-pull conversion circuit, the high-voltage power supply provided by the invention is additionally provided with the auxiliary function circuit to optimize the performance of the transformer self-excitation push-pull conversion circuit and calculate and select the optimal parameters of the direct-current low-voltage supplied to the power conversion and transformer booster circuit, so that the high-voltage stabilized power supply with high precision, low drift, low ripple and quick response is realized, the practicability is good, and details are described in the following description.
In order to achieve the purpose, the invention provides the following technical scheme:
the invention provides a high-voltage power supply which comprises an anti-interference circuit, an adjusting circuit, a power conversion and transformer booster circuit, an error amplifying circuit, a voltage-multiplying rectification RC filter circuit, a sampling circuit, a reference circuit and a control circuit, wherein the anti-interference circuit is connected with the adjusting circuit; the regulating circuit is connected with the power conversion and transformer booster circuit, the error amplifying circuit and the anti-interference circuit, the voltage-multiplying rectification RC filter circuit is connected with the sampling circuit and the power conversion and transformer booster circuit, and the error amplifying circuit is connected with the reference circuit, the control circuit and the sampling circuit.
As an important design of the scheme, the anti-interference circuit comprises a capacitor C1 and a capacitor C2, wherein the positive electrode of the capacitor C1 is connected with the input end DCIN, one end of the capacitor C2 and the output end OUT1, and the negative electrode of the capacitor C1 is connected with the other end of the capacitor C2 and GND.
As an optimized design of the scheme, the adjusting circuit comprises a MOS transistor V1, a resistor R1 and a resistor R2, the drain of the MOS transistor V1 is connected with the output end OUT1, the source of the MOS transistor V1 is connected with one end of the resistor R1 and the output end OUT2, the gate of the MOS transistor V1 is connected with the other end of the resistor R1 and one end of the resistor R2, and the other end of the resistor R2 is connected with the output end OUT 3.
As an optimized design of the scheme, the power conversion and transformer booster circuit comprises a triode V2, a triode V3, a primary and secondary winding T1, a resistor R3, a resistor R4, a resistor R5, a capacitor C3 and a capacitor C4, the primary and secondary winding T1 comprises a primary winding and a secondary winding, the 2 end of the primary winding and one end of the resistor R3 are connected with an output end OUT2, the 1 end of the primary winding is connected with a collector of the triode V2, an emitter of the triode V2 is connected with GND, one end of the capacitor C3 and one end of the resistor R4, a base of the triode V2 is connected with the 5 end of the primary winding, the 4 end of the primary winding is connected with the other end of the capacitor C3 and the other end of the resistor R4, the 3 end of the primary winding is connected with a collector of the triode V3, an emitter of the triode V3 is connected with one end of the GND, one end of the capacitor C4 and one end of the resistor R5, a primary end of the, the 7 end of the primary winding is connected with the other end of the resistor R3, the other end of the capacitor C4 and the other end of the resistor R5, the 9 end of the secondary winding is connected with the output end OUT4, and the 8 end of the secondary winding is connected with GND.
As an optimized design of the scheme, the voltage-multiplying rectifying RC filter circuit comprises a diode V4, a diode V5, a diode V6, a capacitor C5, a capacitor C6, a capacitor C7, a capacitor C8 and a resistor R6, one end of the capacitor C6 and the negative electrode of the diode V4 are connected with the output terminal OUT4, the positive electrode of the diode V4 is connected with the negative electrode of the diode V5, one end of the capacitor C5 and one end of the capacitor C7, the other end of the capacitor C5 is connected with GND, the positive electrode of the diode V5 is connected with the other end of the capacitor C6 and the negative electrode of the diode V6, the positive electrode of the diode V6 is connected with the other end of the capacitor C7 and one end of the resistor R6, the other end of the resistor R6 is connected with one end of the capacitor C6 and the output terminal OUT6, and the other.
As an optimized design of the scheme, the sampling circuit comprises a resistor R7, wherein a 1 end of the resistor R7 is connected with an output end OUT5, a 2 end of the resistor R7 is connected with an output end OUT6, and a 3 end of the resistor R7 is connected with GND.
As an optimized design of the scheme, the error amplifying circuit comprises an operational amplifier N1, a resistor R8, a resistor R9, a capacitor C9, a capacitor C10 and a capacitor C11, wherein one end of the resistor R9 and one end of the capacitor C11 are connected with an output end OUT6, the other end of the capacitor C11 is connected with GND, and the other end of the resistor R9 is connected with the 2 end of the operational amplifier N1 and one end of the capacitor C10; the 3 end of the operational amplifier N1 is connected with an output end OUT7, one end of the resistor R8 is connected with the other end of the capacitor C10, the other end of the resistor R8 is connected with the 1 end of the operational amplifier N1 and the output end OUT3, the 8 end of the operational amplifier N1 is connected with one end of the capacitor C9 and the output end OUT8, the other end of the capacitor C9 is connected with GND, and the 4 end of the operational amplifier N1 is connected with GND.
As the optimized design of the scheme, the reference circuit comprises a voltage regulator tube V7, a potentiometer RP1, a capacitor C12 and a resistor R10, wherein the 2 end of the potentiometer RP1 is connected with the output end OUT7, the 1 end of the potentiometer RP1 is connected with one end of the capacitor C12, one end of the resistor R10 and the anode of a voltage regulator tube V7, the 3 end of the potentiometer RP1 is connected with the other end of the capacitor C12, the cathode of the voltage regulator tube V7 and GND, and the other end of the resistor R10 is connected with the output end OUT 1.
As an optimized design of the scheme, the control circuit comprises an optical coupler V8 and a resistor R11, one end of the resistor R11 is connected with an input end DCIN2, one end 1 of the optical coupler V8 is connected with the other end of the resistor R11, the end 2 of the optical coupler V8 is connected with GND, the end 3 of the optical coupler V8 is connected with an output end OUT8, and the end 4 of the optical coupler V8 is connected with the output end OUT 1.
Has the advantages that: on the basis of the existing self-excitation push-pull conversion circuit, the high-voltage power supply provided by the invention is additionally provided with the auxiliary function circuit to optimize the performance of the transformer self-excitation push-pull conversion circuit and calculate and select the optimal parameters of the direct-current low-voltage supplied to the power conversion and transformer booster circuit, so that the high-voltage stabilized power supply with high precision, low drift, low ripple and quick response is realized, and the practicability is good.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a block diagram of the components of the high voltage power supply of the present invention;
FIG. 2 is a jamming circuit diagram of the present invention;
FIG. 3 is a schematic diagram of the adjusting circuit of the present invention;
FIG. 4 is a power conversion circuit and transformer boost circuit diagram of the present invention;
FIG. 5 is a voltage doubler rectifier RC filter circuit diagram of the present invention;
FIG. 6 is a sampling circuit diagram of the present invention;
FIG. 7 is a circuit diagram of an error amplifier of the present invention;
FIG. 8 is a reference circuit diagram of the present invention;
fig. 9 is a control circuit diagram of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
Referring to fig. 1, the high voltage power supply provided by the present invention includes an anti-interference circuit, an adjusting circuit, a power conversion and transformer booster circuit, an error amplifying circuit, a voltage-doubling rectifying RC filter circuit, a sampling circuit, a reference circuit, and a control circuit; the regulating circuit is connected with the power conversion and transformer booster circuit, the error amplifying circuit and the anti-interference circuit, the voltage-multiplying rectification RC filter circuit is connected with the sampling circuit and the power conversion and transformer booster circuit, and the error amplifying circuit is connected with the reference circuit, the control circuit and the sampling circuit; the anti-interference circuit, the adjusting circuit, the power conversion and transformer booster circuit, the error amplifying circuit, the voltage doubling rectification RC filter circuit, the sampling circuit, the reference circuit and the control circuit adopt a control mode of series voltage stabilization, so that the response speed of the whole high-voltage power supply is high, an auxiliary function circuit consisting of the error amplifying circuit, the reference circuit, the control circuit and the sampling circuit can optimize the performance of the transformer self-excited push-pull conversion circuit and calculate and select the optimal parameters of the direct-current low-voltage supplied to the power conversion and transformer booster circuit, so that the high-voltage stabilized power supply with high precision, low drift, low ripple and quick response is realized, and the practicability is good; the anti-jamming circuit converts an input direct-current input power supply into stable and reliable direct-current low-voltage and supplies the stable and reliable direct-current low-voltage to the adjusting circuit, and the adjusting circuit dynamically adjusts the direct-current low-voltage supplied by the anti-jamming circuit according to the direct-current low-voltage adjusting voltage supplied by the error amplifying circuit and supplies the adjusted output voltage to the power conversion and transformer boosting circuit; the power conversion and transformer booster circuit converts the input direct-current low-voltage into alternating-current high-voltage square waves and converts the alternating-current high-voltage square waves into direct-current high-voltage output through the voltage-multiplying rectification RC filter circuit; the reference circuit provides a reference voltage for the error amplifying circuit so as to determine a reference value of the direct-current low-voltage adjusting voltage output by the error amplifying circuit; the control circuit provides a TTL control signal to the error amplification circuit so as to control the error amplification circuit to output direct-current low-voltage adjustment voltage; the sampling circuit divides the direct-current high-voltage output by the voltage-multiplying rectification RC filter circuit according to the proportion through the voltage dividing resistor and then sends the divided voltage to the error amplification circuit, so that the numerical value of the direct-current low-voltage adjustment voltage output by the error amplification circuit is adjusted.
Referring to fig. 2, the anti-jamming circuit includes a capacitor C1 and a capacitor C2, an anode of the capacitor C1 is connected to the input terminal DCIN, one end of the capacitor C2 and the output terminal OUT1, and a cathode of the capacitor C1 is connected to the other end of the capacitor C2 and GND; the DC low-voltage is supplied with power supply voltage through an input end DCIN and enters an anti-interference circuit, and then a stable DC low-voltage is output at an output end OUT1 after low-frequency and high-frequency ripples in the DC low-voltage power supply are filtered through a capacitor C1 and a capacitor C2.
Referring to fig. 3, the adjusting circuit includes a MOS transistor V1, a resistor R1, and a resistor R2, a drain of the MOS transistor V1 is connected to the output terminal OUT1, a source of the MOS transistor V1 is connected to one end of the resistor R1 and the output terminal OUT2, a gate of the MOS transistor V1 is connected to the other end of the resistor R1 and one end of the resistor R2, and the other end of the resistor R2 is connected to the output terminal OUT 3; the voltage difference between the grid and the source of the MOS transistor V1 in the adjusting circuit is a fixed value, after the MOS transistor V1 receives the direct-current low-voltage of the output end OUT1, when the direct-current low-voltage adjusting voltage of the output end OUT3 is increased, the direct-current low-voltage output by the output end OUT2 is increased, and when the direct-current low-voltage adjusting voltage of the output end OUT3 is decreased, the direct-current low-voltage output by the output end OUT2 is decreased; the dc low-voltage output by the output terminal OUT2 increases, the dc high-voltage output of the high-voltage power supply of the present invention (i.e., the low-ripple dc high-voltage output by the output terminal OUT 5) increases, the voltage of the output terminal OUT2 decreases, and the dc high-voltage output of the high-voltage power supply of the present invention (i.e., the low-ripple dc high-voltage output by the output terminal OUT 5) decreases.
Referring to fig. 4, the power conversion and transformer boost circuit includes a triode V2, a triode V3, a primary and secondary winding T1, a resistor R3, a resistor R4, a resistor R5, a capacitor C3, and a capacitor C4, the primary and secondary winding T1 includes a primary winding and a secondary winding, the end 2 of the primary winding and one end of the resistor R3 are connected to the output terminal OUT2, the end 1 of the primary winding is connected to the collector of the triode V2, the emitter of the triode V2 is connected to GND, one end of the capacitor C3 and one end of the resistor R4, the base of the triode V2 is connected to the end 5 of the primary winding, the end 4 of the primary winding is connected to the other end of the capacitor C3 and the other end of the resistor R4, the end 3 of the primary winding is connected to the collector of the triode V3, the emitter of the triode V9 is connected to GND, one end of the capacitor C4 and one end of the resistor R5, the base of the triode V3 is connected to the end, The other end of the capacitor C4 and the other end of the resistor R5, the 9 end of the secondary winding is connected with the output end OUT4, and the 8 end of the secondary winding is connected with GND; the power conversion and transformer boosting circuit receives the direct-current low-voltage of an output end OUT2, the direct-current low-voltage of the output end OUT2 is converted into alternating-current low-voltage square waves through a transformer self-excited push-pull conversion circuit consisting of a triode V2, a triode V3, a resistor R3, a resistor R4, a resistor R5, a capacitor C3, a capacitor C4 and a primary and secondary winding T1 through alternate conduction of a triode V2 and a triode V3, and the alternating-current low-voltage square waves pass through a secondary winding of the primary and secondary winding T1 and output alternating-current high-voltage square waves at the output end OUT 4.
Referring to fig. 5, the voltage-doubling rectifying RC filter circuit includes a diode V4, a diode V5, a diode V6, a capacitor C5, a capacitor C6, a capacitor C7, a capacitor C8, and a resistor R6, one end of a capacitor C6 and a cathode of a diode V4 are connected to an output terminal OUT4, an anode of a diode V4 is connected to a cathode of a diode V5, one end of a capacitor C5, and one end of a capacitor C7, the other end of a capacitor C5 is connected to GND, an anode of a diode V5 is connected to the other end of a capacitor C6 and a cathode of a diode V6, an anode of a diode V6 is connected to the other end of a capacitor C7 and one end of a resistor R6, the other end of a resistor R6 is connected to one end of a capacitor C6 and an output terminal 6, and; the voltage-multiplying rectification RC filter circuit receives alternating-current high-voltage square waves output by an output end OUT4, and outputs direct-current high-voltage after being rectified by a voltage-multiplying rectification circuit consisting of a diode V4, a diode V5, a diode V6, a capacitor C5, a capacitor C6 and a capacitor C7, the direct-current high-voltage is filtered by an RC filter circuit consisting of a resistor R6 and a capacitor C8, ripples on the direct-current high-voltage are reduced, low-ripple direct-current high-voltage is output at an output end OUT5, and the output end OUT5 is also an output end of the high-voltage power supply and can be used for external electric equipment.
Referring to fig. 6, the sampling circuit includes a resistor R7, the resistor R7 is a three-terminal resistor with a fixed resistance, the 1 terminal of the resistor R7 is connected to the output terminal OUT5, the 2 terminal of the resistor R7 is connected to the output terminal OUT6, the 3 terminal of the resistor R7 is connected to GND, the sampling circuit receives the low ripple dc high voltage output by the output terminal OUT5, divides the voltage by the resistor R7, and outputs a dc low voltage sampling voltage at the output terminal OUT6 in a fixed ratio of 600: 1; if the low-ripple direct-current high-voltage output by the output end OUT5 rises, the direct-current low-voltage sampling voltage output by the output end OUT6 rises; on the contrary, if the low ripple dc high voltage output from the output terminal OUT5 decreases, the dc low voltage sampling voltage output from the output terminal OUT6 decreases accordingly.
Referring to fig. 9, the control circuit includes an optical coupler V8 and a resistor R11, one end of the resistor R11 is connected to a control voltage DCIN2, an end 1 of the optical coupler V8 is connected to the other end of the resistor R11, an end 2 of the optical coupler V8 is connected to GND, an end 3 of the optical coupler V8 is connected to an output end OUT8, an end 4 of the optical coupler V8 is connected to an output end OUT1, the control circuit receives a dc low-voltage input by an input end DCIN2, and then emits light through a light emitting diode in the optical coupler V8, so that a phototransistor in the optical coupler V8 is excited to be turned on, the output end OUT1 is turned on with an output end OUT8, a voltage value of the output end OUT1 is obtained at the output end OUT8, and the output end.
Referring to fig. 8, the reference circuit includes a voltage regulator V7, a potentiometer RP1, a capacitor C12 and a resistor R10, the 2 end of the potentiometer RP1 is connected to the output terminal OUT7, the 1 end of the potentiometer RP1 is connected to one end of the capacitor C12, one end of the resistor R10 and the positive electrode of the voltage regulator V7, the 3 end of the potentiometer RP1 is connected to the other end of the capacitor C12, the negative electrode of the voltage regulator V7 and GND, the other end of the resistor R10 is connected to the output terminal OUT1, the reference circuit receives the dc low-voltage output by the output terminal OUT1, then the voltage is stabilized by a high-precision voltage stabilizing tube V7 and is provided for a potentiometer RP1 of a drift coefficient, and by adjusting the resistance value of the potentiometer RP1, the output terminal OUT7 outputs the dc low voltage reference voltage, when the resistance values of the terminals 2 and 3 of the potentiometer RP1 become larger, the dc low voltage reference voltage output by the output terminal OUT7 increases accordingly, when the resistance values of the terminals 2 and 3 of the potentiometer RP1 become smaller, the dc low voltage reference voltage outputted from the output terminal OUT7 decreases accordingly.
Referring to fig. 7, the error amplifying circuit includes an operational amplifier N1, a resistor R8, a resistor R9, a capacitor C9, a capacitor C10, and a capacitor C11, wherein one end of the resistor R9 and one end of the capacitor C11 are connected to the output terminal OUT6, the other end of the capacitor C11 is connected to GND, and the other end of the resistor R9 is connected to the 2 terminal of the operational amplifier N1 and one end of the capacitor C10; the 3 end of the operational amplifier N1 is connected with an output end OUT7, one end of a resistor R8 is connected with the other end of a capacitor C10, the other end of the resistor R8 is connected with the 1 end of an operational amplifier N1 and the output end OUT3, the 8 end of the operational amplifier N1 is connected with one end of the capacitor C9 and the output end OUT8, the other end of the capacitor C9 is connected with GND, and the 4 end of the operational amplifier N1 is connected with GND; the operational amplifier N1 receives a direct-current low-voltage output by an output end OUT8 as a power supply voltage, a direct-current low-voltage sampling voltage output by an output end OUT6 is a reverse end voltage, a direct-current low-voltage reference voltage output by an output end OUT7 is a same-direction end voltage, the power supply voltage OUT8 is normal, and when the voltage of the same-direction end of OUT7 is higher than that of the reverse end voltage of OUT6, the output end OUT3 has voltage; when the difference between the voltage of the OUT7 in the same direction and the voltage of the OUT6 in the reverse direction is increased, the voltage of the OUT3 output end is increased; when the difference between the voltage of the same direction terminal of OUT7 and the voltage of the opposite direction terminal of OUT6 is reduced, the voltage of the output terminal OUT3 becomes smaller. When the voltage of the OUT7 in the same direction is lower than that of the OUT6 in the reverse direction, the OUT3 has no voltage.
The output end OUT3 of the error amplification circuit is controlled to output direct-current low-voltage adjusting voltage by inputting direct-current low-voltage to the control circuit through the control input end DCIN 2; the value of the direct-current low-voltage adjustment voltage output by the output end OUT3 is adjusted by adjusting the value of the direct-current low-voltage reference voltage output by the output end OUT7, then the value of the direct-current low-voltage output by the output end OUT2 is adjusted, and finally the purpose of adjusting the value of the low-ripple direct-current high-voltage output by the output end OUT5 is achieved, namely the value of the direct-current high-voltage output of the high-voltage power supply is adjusted by adjusting the resistance value of the potentiometer RP 1.
In order to make the high-voltage power supply of the invention have smaller volume, the distance between the adjacent electronic components in the partial circuit can be designed to be between 1mm and 2mm, and at this time, the insulation processing method between the electronic components comprises the following steps:
cleaning electronic components by using a cleaning solution with the ratio of alcohol to gasoline being 1: 1, preparing a diluent by using GBN-32 primer solution and petroleum ether according to the ratio of 3: 100, immersing the welded electronic components into the diluent, slightly shaking, taking out after 30-50 s, putting the electronic components into a mold, waiting for encapsulation, pouring GN521 silica gel glue solution into the mold after 1h, repeatedly performing air suction and deaeration in a vacuum box, closing the vacuum box when no bubble is discharged from the glue solution, ensuring that the deaeration time cannot exceed 1h, putting the encapsulated part into a thermostat with the temperature of 41 +/-2 ℃ for curing for 5h after encapsulation, raising the temperature of the thermostat to 80 ℃ for curing for 2h, taking out, and naturally airing for 5 days.
In order to make the high-voltage power supply light, the shell for manufacturing the high-voltage power supply can be formed by punching steel with the thickness of 0.3mm, and the cover plate for manufacturing the high-voltage power supply is formed by milling aluminum.
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 (9)
1. A high voltage power supply, characterized by: the device comprises an anti-interference circuit, an adjusting circuit, a power conversion and transformer booster circuit, an error amplifying circuit, a voltage-multiplying rectification RC filter circuit, a sampling circuit, a reference circuit and a control circuit; the regulating circuit is connected with the power conversion and transformer booster circuit, the error amplifying circuit and the anti-interference circuit, the voltage-multiplying rectification RC filter circuit is connected with the sampling circuit and the power conversion and transformer booster circuit, and the error amplifying circuit is connected with the reference circuit, the control circuit and the sampling circuit.
2. A high voltage power supply according to claim 1, wherein: the anti-jamming circuit comprises a capacitor C1 and a capacitor C2, wherein the anode of the capacitor C1 is connected with the input end DCIN, one end of the capacitor C2 and the output end OUT1, and the cathode of the capacitor C1 is connected with the other end of the capacitor C2 and GND.
3. A high voltage power supply according to claim 2, wherein: the adjusting circuit comprises a MOS tube V1, a resistor R1 and a resistor R2, the drain of the MOS tube V1 is connected with the output end OUT1, the source of the MOS tube V1 is connected with one end of the resistor R1 and the output end OUT2, the grid of the MOS tube V1 is connected with the other end of the resistor R1 and one end of the resistor R2, and the other end of the resistor R2 is connected with the output end OUT 3.
4. A high voltage power supply according to claim 3, wherein: the power conversion and transformer booster circuit comprises a triode V2, a triode V3, a primary and secondary winding T1, a resistor R3, a resistor R4, a resistor R5, a capacitor C3 and a capacitor C4, wherein the primary and secondary winding T1 comprises a primary winding and a secondary winding, the 2 end of the primary winding and one end of the resistor R3 are connected with an output end OUT2, the 1 end of the primary winding is connected with the collector of a triode V2, the emitter of the triode V2 is connected with GND, one end of the capacitor C3 and one end of a resistor R4, the base of the triode V2 is connected with the 5 end of the primary winding, the 4 end of the primary winding is connected with the other end of the capacitor C3 and the other end of the resistor R4, the 3 end of the primary winding is connected with the collector of a triode V3, the emitter of the triode V3 is connected with one end of GND, one end of the capacitor C4 and one end of the resistor R5, the base of the triode, the 7 end of the primary winding is connected with the other end of the resistor R3, the other end of the capacitor C4 and the other end of the resistor R5, the 9 end of the secondary winding is connected with the output end OUT4, and the 8 end of the secondary winding is connected with GND.
5. A high voltage power supply according to claim 4, wherein: the voltage-multiplying rectification RC filter circuit comprises a diode V4, a diode V5, a diode V6, a capacitor C5, a capacitor C6, a capacitor C7, a capacitor C8 and a resistor R6, wherein one end of the capacitor C6 and the negative electrode of the diode V4 are connected with an output end OUT4, the positive electrode of the diode V4 is connected with the negative electrode of the diode V5, one end of the capacitor C5 and one end of the capacitor C7, the other end of the capacitor C5 is connected with GND, the positive electrode of the diode V5 is connected with the other end of the capacitor C6 and the negative electrode of the diode V6, the positive electrode of the diode V6 is connected with the other end of the capacitor C7 and one end of the resistor R6, the other end of the resistor R6 is connected with one end of the capacitor C6 and the output end OUT6, and the other.
6. A high voltage power supply according to claim 5, wherein: the sampling circuit comprises a resistor R7, wherein the 1 end of the resistor R7 is connected with the output end OUT5, the 2 end of the resistor R7 is connected with the output end OUT6, and the 3 end of the resistor R7 is connected with GND.
7. A high voltage power supply according to claim 6, wherein: the error amplification circuit comprises an operational amplifier N1, a resistor R8, a resistor R9, a capacitor C9, a capacitor C10 and a capacitor C11, wherein one end of the resistor R9 and one end of the capacitor C11 are connected with an output end OUT6, the other end of the capacitor C11 is connected with GND, and the other end of the resistor R9 is connected with the 2 end of the operational amplifier N1 and one end of the capacitor C10; the 3 end of the operational amplifier N1 is connected with an output end OUT7, one end of the resistor R8 is connected with the other end of the capacitor C10, the other end of the resistor R8 is connected with the 1 end of the operational amplifier N1 and the output end OUT3, the 8 end of the operational amplifier N1 is connected with one end of the capacitor C9 and the output end OUT8, the other end of the capacitor C9 is connected with GND, and the 4 end of the operational amplifier N1 is connected with GND.
8. A high voltage power supply according to claim 7, wherein: the reference circuit comprises a voltage regulator tube V7, a potentiometer RP1, a capacitor C12 and a resistor R10, wherein the 2 end of the potentiometer RP1 is connected with the output end OUT7, the 1 end of the potentiometer RP1 is connected with one end of the capacitor C12, one end of the resistor R10 and the anode of the voltage regulator tube V7, the 3 end of the potentiometer RP1 is connected with the other end of the capacitor C12, the cathode of the voltage regulator tube V7 and GND, and the other end of the resistor R10 is connected with the output end OUT 1.
9. A high voltage power supply according to claim 8, wherein: the control circuit includes opto-coupler V8 and resistance R11, input end DCIN2 is connected to the one end of resistance R11, the other end of 1 end connecting resistance R11 of opto-coupler V8, 2 end connection GND of opto-coupler V8, output end OUT8 is connected to 3 end of opto-coupler V8, output end OUT1 is connected to 4 end of opto-coupler V8.
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| CN201911347099.1A CN111092556A (en) | 2019-12-24 | 2019-12-24 | High-voltage power supply |
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| CN201911347099.1A CN111092556A (en) | 2019-12-24 | 2019-12-24 | High-voltage power supply |
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Application publication date: 20200501 |