CN115603585A - Self-adaptive adjusting device and method for power amplifier power supply - Google Patents
Self-adaptive adjusting device and method for power amplifier power supply Download PDFInfo
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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
- H02M3/33573—Full-bridge at primary side of an isolation transformer
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0003—Details of control, feedback or regulation circuits
- H02M1/0038—Circuits or arrangements for suppressing, e.g. by masking incorrect turn-on or turn-off signals, e.g. due to current spikes in current mode control
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0048—Circuits or arrangements for reducing losses
- H02M1/0054—Transistor switching losses
- H02M1/0058—Transistor switching losses by employing soft switching techniques, i.e. commutation of transistors when applied voltage is zero or when current flow is zero
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
- H02M1/088—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices
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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
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
- H02M7/5387—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
- H02M7/53871—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration with automatic control of output voltage or current
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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Abstract
The invention provides a self-adaptive adjusting device and an adjusting method for a power amplifier power supply, wherein the adjusting method comprises the following steps: s1: DC-DC inversion topology selection → S2: the soft switch adjustment, first rectification filtering module is passed through the three-phase rectifier bridge with three-phase power and is handled into pulsating direct current signal, and rethread electrolytic capacitor carries out the filtering to direct current signal, and the switch contravariant module is high frequency square wave alternating current signal with direct current signal conversion, provides drive signal for the full-bridge switch tube through the ZVS soft switch. The invention realizes that the waveform crossing time of voltage and current is reduced to zero theoretically in the switching-on and switching-off processes of the switching tube by using the resonance principle through the soft switch, thereby reducing the switching loss of the switching tube to zero theoretically, reducing the energy loss in the switching process, reducing the design investment of a heat dissipation link when designing a power supply and reducing the use cost of the power amplifier power supply.
Description
Technical Field
The invention relates to the technical field of power amplifier adjustment, in particular to a power amplifier power supply self-adaptive adjusting device and an adjusting method.
Background
At present, the power amplification types of the logging instrument generally comprise A type, B type, AB type, D type and the like, different types of power amplifiers have different advantages and disadvantages, and various power amplifiers have different related applications. The class A power amplifier has the lowest efficiency, but has good linearity and simple design; the B-type power amplifier has higher efficiency than the A-type power amplifier, but has more serious cross-over distortion and poor linearity; the AB class is between the two classes, the efficiency is moderate, and the linearity is better than that of the B class; the class-D power amplifier has the highest efficiency and good linearity, but the highest efficiency is not more than 85% due to the limitation of devices (switching speed, leakage current, on-resistance are not zero, etc.) and the imperfection of design, and the class-D power amplifier can only be applied to the amplification of low-frequency signals, so that the class-D power amplifier is not applicable when the frequency of a transmitted signal is higher.
The chinese patent application No. 201710474045.6 discloses a self-adaptive adjusting device for a power amplifier of a logging instrument, which converts an effective value of a transmitting signal amplitude into a direct-current voltage by detecting the amplitude of the transmitting signal in real time, samples the voltage by an 8-bit parallel port ADC sampling module, realizes parallel port output after analog-to-digital conversion, converts an analog quantity of the transmitting signal amplitude into an 8-bit binary digital quantity, and reflects the digital quantity to an output voltage value of a switching power supply. Through reasonable circuit parameter matching, nonlinear errors output by the switch power supply and the power amplifier are eliminated, so that the change of the transmitting signal and the input voltage of the power amplifier, namely the output voltage of the switch power supply, are in a linear proportional relation, the power amplifier always works in a state close to full load output, the heat loss of the power supply is reduced, the power amplifier efficiency is improved, and the power consumption of the power supply is also reduced. Meanwhile, the invention can automatically select whether the power is supplied by the switch power supply or the main power supply for the power amplifier according to the size of the transmitting signal.
The above technology has the following disadvantages: when the adjusting device is used for adjusting the power supply, the waveform crossing time of voltage and current is long in the switching-on and switching-off processes of the switching tube, so that the switching loss of the switching tube is large, the energy loss in the switching-on and switching-off processes is further increased, and the use cost of the power amplifier power supply is improved.
Disclosure of Invention
The invention provides a self-adaptive adjusting device and method for a power amplifier power supply, aiming at the defects of the prior art.
The invention solves the technical problems through the following technical means: the self-adaptive adjustment method of the power amplifier power supply comprises the following steps:
s1: DC-DC inversion topology selection
Selecting a full-bridge topological structure as a DC-DC inversion topological structure;
s2: soft switch adjustment
The soft switch reduces the waveform crossing time of voltage and current to zero in the switching-on and switching-off processes of the switching tube by a resonance principle, so that the switching loss of the switching tube is reduced to zero.
Preferably, the soft switches comprise a ZVS zero-voltage soft switch and a ZVZCS zero-voltage zero-current soft switch, and the ZVS soft switch enables four switching tubes in the full-bridge inverter circuit to be the zero-voltage soft switch through a resonance principle; the ZVZCS soft switch enables two switches in the full-bridge inverter circuit to realize zero-voltage soft switching through a resonance principle, and the other two switch tubes realize zero-current soft switching.
Preferably, the resonant components of the ZVS soft switch are switching tubes connected with capacitors C1-C4 and a transformer leakage inductance Lr in parallel, so that the voltages at two ends of the switching tubes are reduced to zero when the switching tubes are switched on, and the zero-voltage soft switch of the switching tubes is realized.
Preferably, the resonant components of the ZVZCS soft switch are switching tubes connected with capacitors C1 and C2 and a leakage inductance Lr of a transformer in parallel, the two ends of the switching tubes Q3 and Q4 are not connected with capacitors in parallel, and two diodes are introduced to the Q3 and Q4 bridge arms, so that the Q1 and Q2 bridge arms realize zero-voltage soft switching, and the Q3 and Q4 bridge arms realize zero-current soft switching.
Preferably, the ZVS soft switch has a timing requirement for a driving signal as follows:
s2.1: +1 state, i.e. when Q1 and Q4 are on at the same time, current flows through Q1 to the transformer to Q4, and voltage V between points AB AB =+V in ；
S2.2: -1 state, i.e. when Q2 and Q3 are simultaneously on, current flows through Q3 to the transformer and then to Q2, when voltage V between points AB and B AB =-V in ；
S2.3:0 state, i.e. when Q1 and Q4 are not simultaneously on and Q2 and Q3 are not simultaneously on, when the voltage V between points AB and Q3 AB =0。
Preferably, the ZVS soft switching comprises the following switching modes;
full-bridge control: +1 state → -1 state, -1 state → +1 state;
limited bipolar control: a ± 1 state- → 0 state;
phase shift control: 0 state → ± 1 state.
The invention also provides a power amplifier power supply self-adaptive adjusting device, which is used for realizing the power amplifier power supply self-adaptive adjusting method and comprises a first rectifying and filtering module, a switch inversion module, a voltage transformation module, a second rectifying and filtering module and a control module;
the three-phase power supply is processed into pulsating direct current signals through a three-phase rectifier bridge by the first rectifier filter module, the direct current signals are filtered through an electrolytic capacitor, the direct current signals are converted into high-frequency square wave alternating current signals by the switch inverter module, driving signals are provided for a full-bridge switching tube through a ZVS (zero voltage switching) soft switch, the output voltage is adjusted by the transformer module together with the inverter bridge switching tube after the transformer module receives the high-frequency square wave alternating current signals, the high-frequency square wave alternating current signals output by the transformer module are converted into direct current signals by the second rectifier filter module, the control module samples the output voltage and the current signals, the PID operation is participated after digital quantity is obtained, the phase-shift PWM signals are controlled, and the effective duty ratio of the inverter bridge is changed.
Preferably, the voltage transformation module is further used for transforming voltage and isolating input and output power supplies.
The invention has the beneficial effects that:
1. according to the invention, the wave-shape crossing time of voltage and current is reduced to zero theoretically in the switching-on and switching-off processes of the switching tube by using the resonance principle through the soft switch, so that the switching loss of the switching tube is reduced to zero theoretically, and the energy loss in the switching process is reduced, so that the design investment of a heat dissipation link can be reduced when a power supply is designed, and the use cost of the power amplifier power supply is reduced;
2. the soft switch can reduce the stress of voltage and current in the switching-on and switching-off processes of the switch tube, so that the switch peak of the switch tube is suppressed, the switch noise is reduced to the minimum, and the filtering design of a rear end on a direct-current power supply is facilitated.
Drawings
FIG. 1 is a flow chart of the adjustment method of the present invention;
FIG. 2 is a system block diagram of the power supply of the present invention;
FIG. 3 is a circuit diagram of the ZVS soft switch of the present invention;
FIG. 4 is a circuit diagram of a ZVZCS soft switch of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
Example 1
Referring to fig. 1, the power amplifier power supply adaptive adjustment method according to the embodiment includes the following steps:
common DC-DC inversion topological structures include a single-end type, a push-pull type, a half-bridge type and a full-bridge type. Since the peak power of the direct-current power supply is researched to reach 40kW, the direct-current power supply belongs to the category of high-power supplies, and the adopted topological structures comprise a push-pull type topological structure, a half-bridge type topological structure and a full-bridge type topological structure, the push-pull type topological structure has the advantage of simple driving circuit, but because only two switching tubes are used in the topological structure, the voltage stress of the switching tubes is increased when the direct-current power supply is used in the design of the high-power supply, and the stability of the power supply is poor; and half bridge topology structure also only uses two switch tubes, can make the current stress increase of switch tube in high-power switching power supply design, is unfavorable for improving the output of power simultaneously, so this design adopts full-bridge topology structure, can satisfy the designing requirement, makes things convenient for selecting for use of circuit component simultaneously.
The soft switch realizes that the waveform crossing time of voltage and current is reduced to zero theoretically in the switching-on and switching-off processes of the switching tube by utilizing a resonance principle, so that the switching loss of the switching tube is reduced to zero theoretically, and particularly, in the design of the switching power supply, a resonance component (usually a capacitor and an inductor) is added in a circuit to enable a power circuit to generate resonance, so that the design of the soft switch of the switching tube is realized.
The soft switch can reduce the energy loss in the switching process to a great extent, so the design investment of a heat dissipation link can be reduced when a power supply is designed, and meanwhile, in a circuit of the soft switch, because the soft switch can slow down the stress of voltage and current in the switching-on and switching-off processes of a switching tube, the switching peak of the switching tube is restrained, thereby the switching noise is also reduced to the minimum, and the filtering design of a rear end to a direct current power supply is facilitated.
The soft switches are mainly divided into ZVS zero-voltage soft switches and ZVZCS zero-voltage zero-current soft switches, and the ZVS soft switches are all zero-voltage soft switches in the full-bridge inverter circuit by utilizing the resonance principle; the ZVZCS soft switch is realized by two switches in the full-bridge inverter circuit through a resonance principle, and the other two switch tubes are realized by zero-current soft switch.
Referring to fig. 3, the resonant components of the ZVS soft switch are switching tubes connected with capacitors C1 to C4 and a transformer leakage inductance Lr in parallel, and the zero-voltage soft switch of the switching tubes is realized by using the resonance technology and the principle that the capacitor voltage cannot suddenly change, so that the voltage at two ends of the switching tubes is already reduced to zero when the switching tubes are turned on.
Referring to fig. 4, the resonant components of the ZVZCS soft switch are switching tubes connected with capacitors C1 and C2 and a leakage inductance Lr of a transformer, and different from the ZVS topology structure, there is no parallel capacitor at two ends of the switching tubes Q3 and Q4, and two diodes are introduced to the Q3 and Q4 bridge arms, so that the Q1 and Q2 bridge arms implement zero-voltage soft switching, and the Q3 and Q4 bridge arms implement zero-current soft switching.
In summary, the ZVS and ZVZCS converters have both advantages and disadvantages in terms of performance, and because the power variation range required by the power amplifier of the logging tool is not very large, and the power amplifier mainly has relatively strict requirements on the reliability, accuracy, anti-interference performance and other aspects of the power supply system, the present embodiment adopts a ZVS soft switch conversion topology structure in consideration of multiple aspects.
Referring to fig. 3, the timing requirements of the ZVS soft switch for the driving signals are as follows:
(1) +1 state, i.e. when Q1 and Q4 are on at the same time, current flows through Q1 to the transformer to Q4, and voltage V between points AB AB =+V in ；
(2) -1 state, i.e. when Q2 and Q3 are simultaneously on, current flows through Q3 to the transformer and then to Q2, when voltage V between points AB and B AB =-V in ；
(3) 0 state, i.e. when Q1 and Q4 are not simultaneously on and Q2 and Q3 are not simultaneously on, when the voltage V between points AB and Q3 AB =0；
Due to the existence of the above three states, three types of switching modes between the three states are generated:
(a) Full-bridge control: +1 state → -1 state, or-1 state → +1 state;
(b) Limited bipolar control: state ± -1- → 0;
(c) Phase-shift control: 0 state → ± 1 state.
In this embodiment, limited bipolar control or phase shift control is preferably used as a control strategy of the ZVS soft switch, because the switching time of the leading bridge arm of the phase shift control is prior to that of the lagging bridge arm, the switching of the leading bridge arm short-circuits the capacitors connected in parallel at two ends of the switching tube, and no large amount of charges are accumulated on the capacitors, which is very beneficial to zero-voltage switching of the switching tube.
Example 2
Referring to fig. 2, the power amplifier power supply adaptive adjustment device of the present embodiment includes a first rectification filter module, a switch inverter module, a voltage transformation module, a second rectification filter module, and a control module;
wherein,
the first rectifying and filtering module: the rectifier filter circuit is used for applying a rectifier filter circuit to a three-phase power supply, the three-phase power supply is processed into pulsating direct current signals through a three-phase rectifier bridge, and then the direct current signals are filtered by a large-capacity electrolytic capacitor, so that a cleaner direct current power supply with smaller pulsation can be obtained, and the direct current power supply is used for an inverter bridge circuit.
The switch inversion module: the ZVS soft switch is used for converting a direct current signal into a high-frequency square wave alternating current signal, the high-frequency square wave alternating current signal is used as a switching tube of the converter through the ZVS soft switch, a driving signal is provided for the full-bridge switching tube under the conditions of high voltage and large current, and the converter adopts the ZVS soft switch design, so that the efficiency of a power supply system can be improved, and the switching interference of the switching tube is reduced.
A voltage transformation module: the high-frequency square wave alternating current voltage stabilizing circuit is used for converting voltage, adjusting output voltage together with an inverter bridge switching tube after receiving high-frequency square wave alternating current signals, and on the other hand, the high-frequency square wave alternating current voltage stabilizing circuit plays a role in isolating input and output power supplies, so that the output direct current stabilized voltage power supply is not easy to injure operators.
The second rectifying and filtering module: the high-frequency square wave alternating current signal is converted into a direct current signal, a stable direct current power supply can be obtained through an LC filter composed of an output filter inductor and an output filter capacitor in a full-bridge rectification mode, in order to improve the accuracy of power supply output voltage, a common mode filter inductor and a high-frequency filter capacitor are added behind the LC filter, high-frequency interference signals are further filtered, and therefore the direct current stabilized voltage power supply with small ripple voltage can be obtained.
A control module: the control module takes an STM32F103 microcontroller as a core, and realizes the digital design of phase-shifting PWM driving signals and feedback control.
It is noted that, in this document, relational terms such as first and second, and the like, if any, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of another identical element in a process, method, article, or apparatus that comprises the element.
The above examples are only intended to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (8)
1. The self-adaptive adjustment method of the power amplifier power supply is characterized by comprising the following steps: the adjusting method comprises the following steps:
s1: DC-DC inversion topology selection
Selecting a full-bridge topological structure as a DC-DC inversion topological structure;
s2: soft switch adjustment
The soft switch reduces the waveform crossing time of voltage and current to zero in the switching-on and switching-off processes of the switching tube by a resonance principle, so that the switching loss of the switching tube is reduced to zero.
2. The adaptive adjustment method for the power amplifier power supply of claim 1, characterized in that: the soft switches comprise ZVS zero-voltage soft switches and ZVZCS zero-voltage zero-current soft switches, and the ZVS soft switches enable four switching tubes in the full-bridge inverter circuit to be the zero-voltage soft switches through the resonance principle; the ZVZCS soft switch enables two switches in the full-bridge inverter circuit to realize zero-voltage soft switching through a resonance principle, and the other two switch tubes realize zero-current soft switching.
3. The adaptive adjustment method for the power amplifier power supply of claim 2, characterized in that: and the resonance components of the ZVS soft switch are switching tubes connected with capacitors C1-C4 and a transformer leakage inductance Lr in parallel, so that the voltages at two ends of the switching tubes are reduced to zero when the switching tubes are switched on, and the zero-voltage soft switch of the switching tubes is realized.
4. The adaptive adjustment method for the power amplifier power supply of claim 2, characterized in that: the resonance components of the ZVZCS soft switch are switching tubes connected with capacitors C1 and C2 and a leakage inductance Lr of a transformer in parallel, the two ends of the switching tubes Q3 and Q4 are not connected with the capacitors in parallel, and two diodes are introduced into bridge arms Q3 and Q4, so that the bridge arms Q1 and Q2 realize zero-voltage soft switching, and the bridge arms Q3 and Q4 realize zero-current soft switching.
5. The adaptive adjustment method for the power amplifier power supply of claim 3, characterized in that: the ZVS soft switch has the following requirements on the time sequence of the driving signal:
s2.1: +1 state, i.e. when Q1 and Q4 are on simultaneously, current flows through Q1 to the transformer to Q4, and the voltage V between points AB AB =+V in ；
S2.2: -1 state, i.e. when Q2 and Q3 are simultaneously on, current flows through Q3 to the transformer and then to Q2, when voltage V between points AB and B AB =-V in ；
S2.3:0 state, i.e. when Q1 and Q4 are not simultaneously on and Q2 and Q3 are not simultaneously on, when the voltage V between points AB and Q3 AB =0。
6. The adaptive adjustment method for the power amplifier power supply of claim 5, characterized in that: the ZVS soft switch comprises the following switching modes;
full-bridge control: +1 state → -1 state, -1 state → +1 state;
limited bipolar control: state ± -1- → 0;
phase shift control: 0 state → ± 1 state.
7. The adaptive adjusting device of the power amplifier power supply, the adjusting device is used for realizing the adaptive adjusting method of the power amplifier power supply of any one of claims 1 to 6, and is characterized in that: the power supply comprises a first rectifying and filtering module, a switch inversion module, a voltage transformation module, a second rectifying and filtering module and a control module;
the three-phase power supply is processed into pulsating direct current signals through a three-phase rectifier bridge by the first rectifier filter module, the direct current signals are filtered through an electrolytic capacitor, the direct current signals are converted into high-frequency square wave alternating current signals by the switch inverter module, driving signals are provided for a full-bridge switching tube through a ZVS (zero voltage switching) soft switch, the output voltage is adjusted by the transformer module together with the inverter bridge switching tube after the transformer module receives the high-frequency square wave alternating current signals, the high-frequency square wave alternating current signals output by the transformer module are converted into direct current signals by the second rectifier filter module, the control module samples the output voltage and the current signals, the PID operation is participated after digital quantity is obtained, the phase-shift PWM signals are controlled, and the effective duty ratio of the inverter bridge is changed.
8. The adaptive adjusting device of the power amplifier power supply of claim 7, characterized in that: the voltage transformation module is also used for transforming voltage and isolating input and output power supplies.
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| CN202211307809.XA Pending CN115603585A (en) | 2022-10-25 | 2022-10-25 | Self-adaptive adjusting device and method for power amplifier power supply |
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| CN110504852A (en) * | 2019-09-14 | 2019-11-26 | 浙江大学 | A kind of the single-phase soft-switching charger topology and its modulator approach of decoupling with voltage |
| CN211127590U (en) * | 2019-12-19 | 2020-07-28 | 陕西科技大学 | Phase-shifted full-bridge zero-voltage zero-current soft switching DC-DC converter |
| CN217545885U (en) * | 2022-06-24 | 2022-10-04 | 武汉德普新源科技有限公司 | Bidirectional CLLC converter device applied to wide voltage range |
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| CN107707136A (en) * | 2017-10-26 | 2018-02-16 | 华南理工大学 | Full-bridge LLC mode of resonance plasma electrical sources based on SiC power devices |
| CN110401350A (en) * | 2019-07-01 | 2019-11-01 | 中南大学 | The phase-shifting control method of the full-load range ZVS of double active full-bridge bidirectional DC-DC converters |
| CN110504852A (en) * | 2019-09-14 | 2019-11-26 | 浙江大学 | A kind of the single-phase soft-switching charger topology and its modulator approach of decoupling with voltage |
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Application publication date: 20230113 |