CN210444174U - Self-adaptive following type program-controlled power supply - Google Patents
Self-adaptive following type program-controlled power supply Download PDFInfo
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- CN210444174U CN210444174U CN201921364742.7U CN201921364742U CN210444174U CN 210444174 U CN210444174 U CN 210444174U CN 201921364742 U CN201921364742 U CN 201921364742U CN 210444174 U CN210444174 U CN 210444174U
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Abstract
The utility model discloses a programme-controlled power supply of self-adaptation trailing type, including voltage detection circuit, steady voltage control circuit, PWM signal generation circuit, signal isolation circuit, rectification input circuit, half-bridge circuit, rectification output circuit and sampling feedback circuit, voltage detection circuit, PWM signal generation circuit and sampling feedback circuit are connected with steady voltage control circuit respectively, PWM signal generation circuit is connected with signal isolation circuit, rectification input circuit and rectification output circuit are connected with half-bridge circuit respectively, rectification output circuit is connected with sampling feedback circuit, sampling feedback circuit and steady voltage control circuit are connected. The utility model discloses use the fixed pressure differential mode to come dynamic adjustment supply voltage, make supply voltage and output voltage's pressure differential all be in a fixed voltage, can realize the promotion of power, also can remain linear power amplifier circuit's high-fidelity, quick response, low noise's advantage.
Description
Technical Field
The utility model relates to a power amplifier technical field, specific theory relates to a programme-controlled power supply of self-adaptation following formula.
Background
In a conventional linear power amplification model, a direct-current voltage source is generally used for supplying power (a symmetric dual power source or a single power source is used), during power amplification, the sum of a voltage drop across a power tube and an output voltage value is a power voltage value, and the smaller the output is, the larger the power borne by the power tube is, for example: the power amplifier output current is Io, the output voltage is Uo, the total power P provided by the power supply is U × Io, and the output power is Po × Io, the power amplifier efficiency is n ═ Po/P, and the power consumption on the power tube is P1 ═ P-Po ═ Io (U-Uo). A direct factor in increasing efficiency is therefore to reduce the power tube drop to minimize power losses in the linear amplifier.
At present, aiming at the defect of low efficiency of a linear power amplifier, a class D power amplifier and a class E power amplifier are developed in recent years, however, the introduction of high-frequency noise of the class D power amplifier has a high-frequency modulation link, so that the index characteristics are inevitably influenced, and particularly in the field of electric energy metering with higher requirement on electric energy quality, and in addition, the digital amplifier limits the bandwidth of an output signal due to the modulation frequency, so that the performance of the digital amplifier cannot be widely accepted in a precise standard electric measuring source.
Due to the inherent defects of the digital amplifier, the traditional linear amplifier is still widely applied to the field of standard power amplification due to the excellent signal fidelity and bandwidth of the traditional linear amplifier, but the current output capacity requirement on a standard power source is higher and higher, the loss of the traditional linear amplifier is a problem which cannot be ignored, the power supply mode of the self-adaptive power source is generated, the high-efficiency output index can be ensured, and the power utilization rate can be greatly improved.
Disclosure of Invention
In order to overcome the deficiencies of the prior art, the utility model provides a program-controlled power supply of self-adaptation following type.
The utility model discloses technical scheme as follows:
the utility model provides a programme-controlled power supply of self-adaptation follow-up, its characterized in that, includes voltage detection circuit, steady voltage control circuit, PWM signal circuit, signal isolation circuit, rectification input circuit, half-bridge circuit, rectification output circuit and sampling feedback circuit, voltage detection circuit PWM signal circuit with sampling feedback circuit respectively with steady voltage control circuit connects, PWM signal circuit with signal isolation circuit connects, signal isolation circuit rectification input circuit with rectification output circuit respectively with half-bridge circuit connects, rectification output circuit with sampling feedback circuit connects, sampling feedback circuit and steady voltage control circuit connect.
Preferably, the voltage detection circuit includes a first triode, a second triode, a first amplifier, a second amplifier, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, and an eighth resistor, a collector terminal of the first triode, a positive voltage follower terminal, and a first terminal of the first resistor are respectively connected to a first node, a second terminal of the first resistor, a first terminal of the second resistor, and a forward input terminal of the first amplifier are respectively connected to a second node, a second terminal of the second resistor is grounded, an output terminal of the first amplifier, a first tube drop voltage output terminal, and a first terminal of the third resistor are respectively connected to a third node, a reverse input terminal of the first amplifier, a second terminal of the third resistor, and a first terminal of the fourth resistor are respectively connected to a fourth node, the second end of the fourth resistor, the emitter end of the first triode, the collector end of the second triode and the first end of the fifth resistor are respectively connected with a fifth node, the second end of the fifth resistor, the first end of the sixth resistor and the forward input end of the second amplifier are respectively connected with a sixth node, the second end of the sixth resistor is grounded, the output end of the second amplifier, the voltage drop output end of the second tube and the first end of the seventh resistor are respectively connected with a seventh node, the reverse input end of the second amplifier, the second end of the seventh resistor and the first end of the eighth resistor are respectively connected with an eighth node, and the second end of the eighth resistor, the emitter end of the second triode and the following negative voltage are respectively connected with a ninth node.
Preferably, the voltage regulation control circuit includes a reference voltage circuit and an error amplification circuit, the reference voltage circuit includes a three-terminal regulator, a ninth resistor, a tenth resistor, an eleventh resistor and a first capacitor, a first end of the ninth resistor is connected to a first positive voltage, a second end of the ninth resistor, a cathode end of the three-terminal regulator, a reference terminal of the three-terminal regulator and a first end of the tenth resistor are respectively connected to a tenth node, a second end of the tenth resistor, a first end of the eleventh resistor, a first end of the first capacitor and a reference voltage end are respectively connected to the eleventh node, a second end of the first capacitor, a second end of the eleventh resistor and an anode end of the three-terminal regulator are respectively connected to the twelfth node, and the twelfth node is grounded.
Preferably, the error amplifying circuit includes a third amplifier, a twelfth resistor, a thirteenth resistor, and a second capacitor, a first end of the twelfth resistor is connected to the reference voltage terminal, a second end of the twelfth resistor is connected to the forward input terminal of the third amplifier, an output terminal of the third amplifier, the signal output voltage, and a first end of the second capacitor are respectively connected to a thirteenth node, a second end of the second capacitor, a reverse input terminal of the third amplifier, and a first end of the thirteenth resistor are respectively connected to a fourteenth node, and a second end of the thirteenth resistor is connected to a third tube drop voltage output terminal.
Preferably, the third amplifier uses a supply voltage of +15V and-15V.
Preferably, the first positive voltage is a 15V positive voltage.
Preferably, the PWM signal generating circuit includes a PWM control chip, a fourteenth resistor, a fifteenth resistor, a sixteenth resistor, a seventeenth resistor, an eighteenth resistor, a third capacitor, a fourth capacitor, a fifth capacitor, and a sixth capacitor, a fifth pin of the PWM control chip, a first end of the third capacitor, and a first end of the fourteenth resistor are respectively connected to a fifteenth node, a second end of the third capacitor, a first end of the fifteenth resistor, and a first end of the fourth capacitor are respectively connected to the sixteenth node, the sixteenth node is grounded, a sixth pin of the PWM control chip is connected to a second end of the fifteenth resistor, a seventh pin of the PWM control chip is connected to a second end of the fourteenth resistor, an eighth pin of the PWM control chip is connected to a second end of the fourth capacitor, a ninth pin of the PWM control chip is connected to a signal input terminal, a tenth pin of the PWM control chip is connected to a first end of the sixteenth resistor, an eleventh pin of the PWM control chip is connected to a first end of the seventeenth resistor, a thirteenth pin of the PWM control chip, a fifteenth pin, a sixteenth pin, a second positive voltage, a first end of a fifth capacitor, and a first end of a sixth capacitor are respectively connected to a seventeenth node, a fourteenth pin of the PWM control chip is connected to a first end of the eighteenth resistor, a fifteenth pin of the PWM control chip is connected to a first end of the fifth capacitor, a sixteenth pin of the PWM control chip is connected to a first end of the sixth capacitor, a second end of the sixteenth resistor, a twelfth pin of the PWM control chip, a second end of the fifth capacitor, and a second end of the sixth capacitor are respectively connected to an eighteenth node, and a second end of the seventeenth resistor is connected with a first PWM signal end, and a second end of the eighteenth resistor is connected with a second PWM signal end.
Preferably, the second positive voltage is a 15V positive voltage.
Preferably, the signal isolation circuit includes an optical coupler, a nineteenth resistor, a twentieth resistor and a twenty-first resistor, the PWM signal input terminal is connected to the first end of the nineteenth resistor, the second end of the nineteenth resistor is connected to the third pin of the optical coupler, the second pin of the optical coupler is connected to the voltage input terminal, the fifth pin of the optical coupler is grounded, the sixth pin of the optical coupler, the first end of the twentieth resistor and the first end of the twenty-first resistor are respectively connected to the nineteenth node, the seventh pin of the optical coupler, the eighth pin of the optical coupler, the second end of the twentieth resistor and the common voltage terminal are respectively connected to the twentieth node, and the second end of the twenty-first resistor is connected to the PWM signal output terminal.
Preferably, the half-bridge circuit includes a driving chip, a transformer, a first MOS transistor, a second MOS transistor, a twenty-second resistor, a twenty-third resistor, a seventh capacitor, an eighth capacitor, a ninth capacitor, a tenth capacitor, an eleventh capacitor, a first diode, a second diode, a third diode, and a first inductor, a first pin of the driving chip is connected to a first end of the twenty-second resistor, a second end of the twenty-second resistor is connected to a control end of the first MOS transistor, a first end of the seventh capacitor, a second pin, a thirteenth pin, and a fifteenth pin of the driving chip are respectively connected to a twenty-second node, the twenty-second node is grounded, a third pin of the driving chip, a first end of the first diode, and a third positive voltage are respectively connected to a twenty-fourth node, a sixth pin of the driving chip, a first end of the eighth capacitor, a second end of the first MOS transistor, a first end of the second MOS transistor, and a first end of the ninth capacitor are respectively connected to a twenty-fifth node, a seventh pin of the driving chip, a second end of the first diode, and a second end of the eighth capacitor are respectively connected to a twenty-sixth node, an eighth pin of the driving chip is connected to a first end of the twenty-third resistor, an eleventh pin of the driving chip is connected to a common voltage, a twelfth pin of the driving chip is connected to a first PWM signal output terminal, a fourteenth pin of the driving chip is connected to a second PWM signal output terminal, a second end of the twenty-third resistor is connected to a control terminal of the second MOS transistor, a second end of the second MOS transistor, a first end of the tenth capacitor, and a fourth positive voltage are respectively connected to a twenty-seventh node, the second end of the seventh capacitor, the second end of the tenth capacitor and the first pin of the transformer are respectively connected with a twenty-eighth node, a second end of the ninth capacitor is connected with a third pin of the transformer, a seventh pin and an eighth pin of the transformer and a first end of the second diode are respectively connected with a twenty-ninth node, the ninth pin, the tenth pin and the first end of the eleventh capacitor of the transformer are respectively connected with the thirtieth node, the thirtieth node is grounded, the eleventh pin and the twelfth pin of the transformer and the first end of the third diode are respectively connected with the thirty-first node, the second end of the second diode, the second end of the third diode and the first end of the first inductor are respectively connected with a thirty-second node, and the second end of the first inductor, the second end of the eleventh capacitor and the follow voltage output end are respectively connected with a thirty-third node.
Preferably, the third positive voltage is a 12V positive voltage, and the fourth positive voltage is a 300V positive voltage.
The utility model has the advantages that: the utility model discloses use the fixed pressure differential mode to come dynamic adjustment supply voltage, make supply voltage and output voltage's pressure differential all be in a fixed voltage, can realize the promotion of power, also can remain linear power amplifier circuit's high-fidelity, quick response, low noise's advantage.
Drawings
Fig. 1 is a block diagram of an embodiment of the present invention.
Fig. 2 is a circuit diagram of a voltage detection circuit according to an embodiment of the present invention.
Fig. 3 is a circuit diagram of a reference voltage circuit according to an embodiment of the present invention.
Fig. 4 is a circuit diagram of an error amplifying circuit according to an embodiment of the present invention.
Fig. 5 is a circuit diagram of a PWM signal generating circuit according to an embodiment of the present invention.
Fig. 6 is a circuit diagram of a signal isolation circuit according to an embodiment of the present invention.
Fig. 7 is a circuit diagram of a half-bridge circuit according to an embodiment of the present invention.
Fig. 8 is a sine wave diagram between the tracking power supply and the output voltage according to an embodiment of the present invention.
Detailed Description
In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
As shown in fig. 1-7, an adaptive following program-controlled power supply includes a voltage detection circuit 1, a voltage stabilization control circuit 2, a PWM generation signal circuit 3, a signal isolation circuit 4, a rectification input circuit 5, a half-bridge circuit 6, a rectification output circuit 7 and a sampling feedback circuit 8, where the voltage detection circuit 1, the PWM generation signal circuit 3 and the sampling feedback circuit 8 are respectively connected to the voltage stabilization control circuit 2, the PWM generation signal circuit 3 is connected to the signal isolation circuit 4, the rectification input circuit 5 and the rectification output circuit 7 are respectively connected to the half-bridge circuit 6, the rectification output circuit 7 is connected to the sampling feedback circuit 8, and the sampling feedback circuit 8 is connected to the voltage stabilization control circuit 2.
As shown in fig. 2, the voltage detection circuit 1 includes a first transistor Q1, a second transistor Q2, a first amplifier U1, a second amplifier U2, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, and an eighth resistor R8, wherein a collector terminal of the first transistor Q1, a first terminal of the first resistor R1 and a first terminal of the first resistor R6 are respectively connected to the first node P1, a second terminal of the first resistor R1, a first terminal of the second resistor R1, and a forward input terminal of the first amplifier U1 are respectively connected to the second node P1, a second terminal of the second resistor R1 is connected to ground, an output terminal of the first amplifier U1, a first terminal of the first transistor V1 and a first terminal of the third resistor R1 are respectively connected to the third node P1, a reverse input terminal of the first resistor R1 and a fourth node P1, a second end of the fourth resistor R4, an emitter end of the first triode Q1, a collector end of the second triode Q2 and a first end of the fifth resistor R5 are respectively connected with a fifth node P5, a second end of the fifth resistor R5, a first end of the sixth resistor R6 and a forward input end of the second amplifier U2 are respectively connected with a sixth node P6, a second end of the sixth resistor R6 is grounded, an output end of the second amplifier U2, a second drop tube voltage output end V2 and a first end of the seventh resistor R7 are respectively connected with a seventh node P7, a reverse input end of the second amplifier U2, a second end of the seventh resistor R7 and a first end of the eighth resistor R8 are respectively connected with an eighth node P8, a second end of the eighth resistor R8, an emitter end of the second triode Q2 and a negative voltage follower-PV are respectively connected with a ninth node P9. The real-time tube voltage drop on each power tube can be obtained by using a subtraction circuit, and the measured voltage is input into the voltage stabilization control circuit 2.
Preferably, the regulator control circuit 2 includes a reference voltage circuit and an error amplification circuit. After the voltage detection circuit 1 obtains the tube voltage drop, the voltage stabilization control circuit 2 can control the voltage at a preset voltage, and no matter what signal is output by the power amplification circuit, the voltage stabilization control circuit 2 can stabilize the tube voltage drop at a fixed value in real time, so that the power loss on the power tube is ensured to be minimum.
As shown in fig. 3, the reference voltage circuit includes a three-terminal regulator Z1, a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, and a first capacitor C1, wherein a first end of the ninth resistor R9 is connected to a 15V positive voltage, a second end of the ninth resistor R9, a cathode end of the three-terminal regulator Z1, a reference end of the three-terminal regulator Z1, and a first end of the tenth resistor R10 are respectively connected to the tenth node P10, a second end of the tenth resistor R10, a first end of the eleventh resistor R11, a first end of the first capacitor C1, and a reference voltage end are respectively connected to the eleventh node P11, a second end of the first capacitor C1, a second end of the eleventh resistor R11, and an anode end of the three-terminal regulator Z1 are respectively connected to the twelfth node P12, and the twelfth node P12 is grounded.
As shown in fig. 4, the error amplifying circuit includes a third amplifier U3, a twelfth resistor R12, a thirteenth resistor R13 and a second capacitor C2, a first end of the twelfth resistor R12 is connected to the reference voltage terminal VREF, a second end of the twelfth resistor R12 is connected to the positive input terminal of the third amplifier U3, an output terminal of the third amplifier U3, the signal output voltage, and a first end of the second capacitor C2 are respectively connected to a thirteenth node P13, a second end of the second capacitor C2, a reverse input terminal of the third amplifier U3, and a first end of the thirteenth resistor R13 are respectively connected to a fourteenth node P14, and a second end of the thirteenth resistor R13 is connected to the tube drop voltage output terminal V. If the reference voltage VREF is set to be 1V, the tube voltage drop of each power tube can be guaranteed to be 1V.
Preferably, the third amplifier U3 uses a supply voltage of +15V and-15V.
As shown IN fig. 5, the PWM signal generating circuit 3 includes a PWM control chip U4, a fourteenth resistor R14, a fifteenth resistor R15, a sixteenth resistor R16, a seventeenth resistor R17, an eighteenth resistor R18, a third capacitor C3, a fourth capacitor C4, a fifth capacitor C5, and a sixth capacitor C6, wherein the fifth pin of the PWM control chip U4, the first end of the third capacitor C3, and the first end of the fourteenth resistor R14 are respectively connected to a fifteenth node P15, the second end of the third capacitor C3, the first end of the fifteenth resistor R15, and the first end of the fourth capacitor C4 are respectively connected to a sixteenth node P16, the sixteenth node P16 is grounded, the sixth pin of the PWM control chip U4 is connected to the second end of the fifteenth resistor R15, the seventh pin of the PWM control chip U4 is connected to the second end of the fourteenth resistor R4, the eighth pin of the PWM control chip U4 is connected to the eighth terminal of the fourth resistor R4, and the ninth terminal of the PWM control chip 4, a tenth pin of the PWM control chip U4 is connected to a first terminal of a sixteenth resistor R16, an eleventh pin of the PWM control chip U4 is connected to a first terminal of a seventeenth resistor R17, a thirteenth pin, a fifteenth pin, a sixteenth pin, a 15V positive voltage, a first terminal of a fifth capacitor C5, and a first terminal of a sixth capacitor C6 are connected to a seventeenth node P17, respectively, a fourteenth pin of the PWM control chip U4 is connected to a first terminal of an eighteenth resistor R18, a fifteenth pin of the PWM control chip U4 is connected to a first terminal of a fifth capacitor C5, a sixteenth pin of the PWM control chip U4 is connected to a first terminal of a sixth capacitor C6, a second terminal of the sixteenth resistor R16, a twelfth pin of the PWM control chip U4, a second terminal of the fifth capacitor C6, and a second terminal of a sixth capacitor C6 are connected to an eighteenth node P18, respectively, and a seventeenth resistor R17 is connected to a PWM signal ml signal terminal, a second terminal of the eighteenth resistor R18 is connected to the second PWM signal terminal PWMH. The PWM signal generation circuit 3 converts the output signal of the error amplification circuit into a high-frequency pulse modulation signal, and outputs the signal to the half-bridge circuit.
The rectified input circuit 5 is used for rectifying, filtering and stabilizing the mains AC220 to obtain a DC voltage of DC300V, which is used for supplying power to the half-bridge circuit.
As shown IN fig. 6, the signal isolation circuit 4 includes an optical coupler U5, a nineteenth resistor R19, a twentieth resistor R20, and a twenty-first resistor R21, the PWM signal input terminal PWM _ IN is connected to a first end of the nineteenth resistor R19, a second end of the nineteenth resistor R19 is connected to a third pin of the optical coupler U5, a second pin of the optical coupler U5 is connected to the voltage input terminal + VDD, a fifth pin of the optical coupler U5 is grounded, a sixth pin of the optical coupler U5, a first end of the twentieth resistor R20, and a first end of the twenty-first resistor R21 are respectively connected to the nineteenth node P19, a seventh pin and an eighth pin of the optical coupler U5, a second end of the twentieth resistor R20, and a common voltage terminal + VCC are respectively connected to the twentieth node P20, and a second end of the twenty-first resistor R21 is connected to the PWM signal output terminal PWM _ OUT. The signals required to be isolated by the signal isolation circuit 4 are a first PWM signal PWML and a second PWM signal PWMH output by the PWM generation signal circuit, the corresponding signals output after isolation are PWML _ OUT and PWMH _ OUT, and the two signals are used for driving a first MOS tube and a second MOS tube of a half-bridge circuit after passing through an IR2110 driving chip. The optical coupler U5 is a 6N137 optical coupler device.
As shown in fig. 7, the half-bridge circuit 6 includes an IR2110S driving chip U6, a transformer T1, a first MOS transistor M1, a second MOS transistor M2, a twenty-second resistor R22, a twenty-third resistor R23, a seventh capacitor C23, an eighth capacitor C23, a ninth capacitor C23, a tenth capacitor C23, an eleventh capacitor C23, a first diode D23, a second diode D23, a third diode D23 and a first inductor L23, a first pin of the IR 362110 driving chip U23 is connected to a first end of the twenty-second resistor R23, a second end of the twenty-second resistor R23 is connected to a control terminal of the first MOS transistor M23, a first end of the seventh capacitor C23, a second pin, a thirteenth pin and a fifteenth pin of the IR 23 driving chip U23, a first node P23 is connected to the first node P23, a positive voltage node P23 and a first node P23, the sixth pin of the IR2110S driving chip U6, the first end of the eighth capacitor C8, the second end of the first MOS transistor M1, the first end of the second MOS transistor M2 and the first end of the ninth capacitor C9 are respectively connected to the twenty-fifth node P25, the seventh pin of the IR2110S driving chip U6, the second end of the first diode D1 and the second end of the eighth capacitor C8 are respectively connected to the twenty-sixth node P26, the eighth pin of the IR2110S driving chip U6 is connected to the first end of the twenty-third resistor R23, the eleventh pin of the IR2110S driving chip U6 is connected to the common positive voltage VCC, the twelfth pin of the IR2110 6 driving chip U6 is connected to the first PWM signal output terminal PWMH _ OUT, the fourteenth pin of the IR2110 36S driving chip U6 is connected to the second PWM signal output terminal PWMH _ OUT, the second end of the twenty-third resistor U23 is connected to the second control node M23, the twenty-fifth node P23 and the positive voltage 363672, the second end of the seventh capacitor C7, the second end of the tenth capacitor C10 and the first pin of the transformer T1 are respectively connected to a twenty-eighth node P28, the second end of the ninth capacitor C9 is connected to the third pin of the transformer T1, the seventh pin and the eighth pin of the transformer T1 and the first end of the second diode D2 are respectively connected to a twenty-ninth node P29, the ninth pin and the tenth pin of the transformer T1, a first end of the eleventh capacitor C11 is connected to the thirtieth node P30, a thirtieth node P30 is grounded, an eleventh pin and a twelfth pin of the transformer T1 and a first end of the third diode D3 are connected to the thirty-first node P31, a second end of the second diode D2, a second end of the third diode D3 and a first end of the first inductor L1 are connected to the thirty-second node P32, and a second end of the first inductor L1, a second end of the eleventh capacitor C11 and the follow-up voltage output terminal PV are connected to the thirty-third node P33. The positive voltage + PV of the follow-up voltage PV fluctuates along with the fluctuation of the positive voltage part of the output voltage, the negative voltage-PV of the follow-up voltage PV fluctuates along with the fluctuation of the negative voltage part of the output voltage, and the positive voltage + PV of the follow-up voltage PV is symmetrical to the negative voltage-PV; for example, the output waveform PV is a sine wave, the + PV and-PV follow the power voltage, and the waveforms PV, + PV and-PV are shown in FIG. 8.
When outputting the fixed current, the loss of the power tube is fixed on a fixed value in real time, namely, the power loss P is delta U and Iout, the delta U is the tube voltage drop, the Iout is the output current, and the delta U is artificially set on a fixed value, so the output loss can be controlled to be minimum.
The utility model has the advantages that: the utility model discloses use the fixed pressure differential mode to come dynamic adjustment supply voltage, make supply voltage and output voltage's pressure differential all be in a fixed voltage, can realize the promotion of power, also can remain linear power amplifier circuit's high-fidelity, quick response, low noise's advantage.
It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are considered to be within the scope of the invention as defined by the following claims.
The above exemplary description of the present invention is made in conjunction with the accompanying drawings, and it is obvious that the present invention is not limited by the above manner, and various improvements made by the method concept and technical solution of the present invention or by directly applying the concept and technical solution of the present invention to other occasions without improvement are all within the protection scope of the present invention.
Claims (10)
1. The utility model provides a programme-controlled power supply of self-adaptation follow-up, its characterized in that, includes voltage detection circuit, steady voltage control circuit, PWM signal circuit, signal isolation circuit, rectification input circuit, half-bridge circuit, rectification output circuit and sampling feedback circuit, voltage detection circuit PWM signal circuit with sampling feedback circuit respectively with steady voltage control circuit connects, PWM signal circuit with signal isolation circuit connects, signal isolation circuit rectification input circuit with rectification output circuit respectively with half-bridge circuit connects, rectification output circuit with sampling feedback circuit connects, sampling feedback circuit and steady voltage control circuit connect.
2. The adaptive follow-up programmable power supply according to claim 1, wherein the voltage detection circuit comprises a first triode, a second triode, a first amplifier, a second amplifier, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor and an eighth resistor, wherein a collector terminal of the first triode, a follow-up positive voltage and a first terminal of the first resistor are respectively connected to a first node, a second terminal of the first resistor, a first terminal of the second resistor and a forward input terminal of the first amplifier are respectively connected to a second node, a second terminal of the second resistor is grounded, an output terminal of the first amplifier, a first terminal of the first tube voltage drop output terminal and a first terminal of the third resistor are respectively connected to a third node, a reverse input terminal of the first amplifier, a first node, a second node, a third node, and a fourth node, The second end of the third resistor and the first end of the fourth resistor are respectively connected with a fourth node, the second end of the fourth resistor, the emitter end of the first triode, the collector end of the second triode and the first end of the fifth resistor are respectively connected with a fifth node, the second end of the fifth resistor, the first end of the sixth resistor and the positive input end of the second amplifier are respectively connected with a sixth node, the second end of the sixth resistor is grounded, the output end of the second amplifier, the output end of the second tube voltage drop output end are connected, the first end of the seventh resistor is respectively connected with the seventh node, the inverting input terminal of the second amplifier, the second end of the seventh resistor and the first end of the eighth resistor are respectively connected with an eighth node, and the second end of the eighth resistor, the emitter end of the second triode and the following negative voltage are respectively connected with a ninth node.
3. The adaptive follow-up program-controlled power supply according to claim 1, wherein the voltage regulation control circuit comprises a reference voltage circuit and an error amplification circuit, the reference voltage circuit comprises a three-terminal regulator, a ninth resistor, a tenth resistor, an eleventh resistor and a first capacitor, a first end of the ninth resistor is connected to a first positive voltage, a second end of the ninth resistor, a cathode end of the three-terminal regulator, a reference end of the three-terminal regulator and a first end of the tenth resistor are respectively connected to a tenth node, a second end of the tenth resistor, a first end of the eleventh resistor, a first end of the first capacitor and a reference voltage end are respectively connected to an eleventh node, a second end of the first capacitor, a second end of the eleventh resistor and an anode end of the three-terminal regulator are respectively connected to a twelfth node, the twelfth node is grounded.
4. The adaptive follow-up programmable power supply according to claim 3, wherein the error amplifying circuit comprises a third amplifier, a twelfth resistor, a thirteenth resistor and a second capacitor, a first end of the twelfth resistor is connected to the reference voltage terminal, a second end of the twelfth resistor is connected to the forward input terminal of the third amplifier, an output terminal of the third amplifier, the signal output voltage, and a first end of the second capacitor are respectively connected to a thirteenth node, a second end of the second capacitor, a reverse input terminal of the third amplifier, and a first end of the thirteenth resistor are respectively connected to a fourteenth node, and a second end of the thirteenth resistor is connected to a third tube drop voltage output terminal.
5. The adaptive follow-up programmable power supply according to claim 4, wherein the third amplifier employs a supply voltage of +15V and-15V.
6. The adaptive follow-up programmable power supply of claim 3, wherein the first positive voltage is a 15V positive voltage.
7. The adaptive follow-up program-controlled power supply according to claim 1, wherein the PWM signal generation circuit includes a PWM control chip, a fourteenth resistor, a fifteenth resistor, a sixteenth resistor, a seventeenth resistor, an eighteenth resistor, a third capacitor, a fourth capacitor, a fifth capacitor, and a sixth capacitor, a fifth pin of the PWM control chip, a first end of the third capacitor, and a first end of the fourteenth resistor are respectively connected to a fifteenth node, a second end of the third capacitor, a first end of the fifteenth resistor, and a first end of the fourth capacitor are respectively connected to a sixteenth node, the sixteenth node is grounded, a sixth pin of the PWM control chip is connected to a second end of the fifteenth resistor, a seventh pin of the PWM control chip is connected to a second end of the fourteenth resistor, and an eighth pin of the PWM control chip is connected to a second end of the fourth capacitor, a ninth pin of the PWM control chip is connected to a signal input terminal, a tenth pin of the PWM control chip is connected to a first end of the sixteenth resistor, an eleventh pin of the PWM control chip is connected to a first end of the seventeenth resistor, a thirteenth pin of the PWM control chip, a fifteenth pin, a sixteenth pin, a second positive voltage, a first end of a fifth capacitor, and a first end of a sixth capacitor are respectively connected to a seventeenth node, a fourteenth pin of the PWM control chip is connected to a first end of the eighteenth resistor, a fifteenth pin of the PWM control chip is connected to a first end of the fifth capacitor, a sixteenth pin of the PWM control chip is connected to a first end of the sixth capacitor, a second end of the sixteenth resistor, a twelfth pin of the PWM control chip, a second end of the fifth capacitor, and a second end of the sixth capacitor are respectively connected to an eighteenth node, and a second end of the seventeenth resistor is connected with a first PWM signal end, and a second end of the eighteenth resistor is connected with a second PWM signal end.
8. The adaptive follow-up programmable power supply of claim 7, wherein the second positive voltage is a 15V positive voltage.
9. The adaptive follow-up programmable power supply of claim 1, the signal isolation circuit comprises an optical coupler, a nineteenth resistor, a twentieth resistor and a twenty-first resistor, a PWM signal input end is connected with a first end of the nineteenth resistor, a second end of the nineteenth resistor is connected with a third pin of the optical coupler, a second pin of the optical coupler is connected with a voltage input end, a fifth pin of the optical coupler is grounded, a sixth pin of the optical coupler, a first end of the twentieth resistor and a first end of the twenty-first resistor are respectively connected with a nineteenth node, and a seventh pin and an eighth pin of the optical coupler, a second end of the twentieth resistor and a common voltage end are respectively connected with a twentieth node, and a second end of the twenty-first resistor is connected with the PWM signal output end.
10. The adaptive follow-up programmable power supply according to claim 1, wherein the half-bridge circuit comprises a driving chip, a transformer, a first MOS transistor, a second MOS transistor, a twenty-second resistor, a twenty-third resistor, a seventh capacitor, an eighth capacitor, a ninth capacitor, a tenth capacitor, an eleventh capacitor, a first diode, a second diode, a third diode and a first inductor, a first pin of the driving chip is connected with a first end of the twenty-second resistor, a second end of the twenty-second resistor is connected with a control end of the first MOS transistor, a first end of the seventh capacitor, a second pin, a thirteenth pin and a fifteenth pin of the driving chip are respectively connected with a twenty-second node, the twenty-second node is grounded, a third pin of the driving chip, a first end of the first diode and a third positive voltage are respectively connected with a twenty-fourth node, a sixth pin of the driving chip, a first end of the eighth capacitor, a second end of the first MOS transistor, a first end of the second MOS transistor, and a first end of the ninth capacitor are respectively connected to a twenty-fifth node, a seventh pin of the driving chip, a second end of the first diode, and a second end of the eighth capacitor are respectively connected to a twenty-sixth node, an eighth pin of the driving chip is connected to a first end of the twenty-third resistor, an eleventh pin of the driving chip is connected to a common voltage, a twelfth pin of the driving chip is connected to a first PWM signal output terminal, a fourteenth pin of the driving chip is connected to a second PWM signal output terminal, a second end of the twenty-third resistor is connected to a control terminal of the second MOS transistor, a second end of the second MOS transistor, a first end of the tenth capacitor, and a fourth positive voltage are respectively connected to a twenty-seventh node, the second end of the seventh capacitor, the second end of the tenth capacitor and the first pin of the transformer are respectively connected with a twenty-eighth node, a second end of the ninth capacitor is connected with a third pin of the transformer, a seventh pin and an eighth pin of the transformer and a first end of the second diode are respectively connected with a twenty-ninth node, the ninth pin, the tenth pin and the first end of the eleventh capacitor of the transformer are respectively connected with the thirtieth node, the thirtieth node is grounded, the eleventh pin and the twelfth pin of the transformer and the first end of the third diode are respectively connected with the thirty-first node, the second end of the second diode, the second end of the third diode and the first end of the first inductor are respectively connected with a thirty-second node, and the second end of the first inductor, the second end of the eleventh capacitor and the follow voltage output end are respectively connected with a thirty-third node.
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| CN201921364742.7U CN210444174U (en) | 2019-08-21 | 2019-08-21 | Self-adaptive following type program-controlled power supply |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112039323A (en) * | 2020-07-13 | 2020-12-04 | 浙江华云信息科技有限公司 | Three-phase program-controlled source based on D-type power amplifier |
| CN112701881A (en) * | 2021-01-25 | 2021-04-23 | 上海雷诺尔科技股份有限公司 | High-voltage series silicon controlled rectifier dual-power trigger system |
| CN113489317A (en) * | 2021-05-26 | 2021-10-08 | 中国电子科技集团公司第四十一研究所 | Program-controlled output power control circuit |
| CN115603728A (en) * | 2022-12-15 | 2023-01-13 | 福建顺昌虹润精密仪器有限公司（Cn） | Signal isolator |
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2019
- 2019-08-21 CN CN201921364742.7U patent/CN210444174U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112039323A (en) * | 2020-07-13 | 2020-12-04 | 浙江华云信息科技有限公司 | Three-phase program-controlled source based on D-type power amplifier |
| CN112039323B (en) * | 2020-07-13 | 2021-08-31 | 浙江华云信息科技有限公司 | Three-phase program-controlled source based on D-type power amplifier |
| CN112701881A (en) * | 2021-01-25 | 2021-04-23 | 上海雷诺尔科技股份有限公司 | High-voltage series silicon controlled rectifier dual-power trigger system |
| CN113489317A (en) * | 2021-05-26 | 2021-10-08 | 中国电子科技集团公司第四十一研究所 | Program-controlled output power control circuit |
| CN113489317B (en) * | 2021-05-26 | 2023-06-09 | 中国电子科技集团公司第四十一研究所 | Program-controlled output power control circuit |
| CN115603728A (en) * | 2022-12-15 | 2023-01-13 | 福建顺昌虹润精密仪器有限公司（Cn） | Signal isolator |
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