CN108471253A - A kind of high efficiency full-bridge active clamp Mono-pole switch power amplifier - Google Patents

A kind of high efficiency full-bridge active clamp Mono-pole switch power amplifier Download PDF

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Publication number
CN108471253A
CN108471253A CN201810522462.8A CN201810522462A CN108471253A CN 108471253 A CN108471253 A CN 108471253A CN 201810522462 A CN201810522462 A CN 201810522462A CN 108471253 A CN108471253 A CN 108471253A
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switching tube
drain electrode
capacitance
source electrode
circuit
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钟曙
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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
    • 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
    • H02M3/33576—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 having at least one active switching element at the secondary side of an isolation transformer
    • H02M3/33584—Bidirectional converters
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/02—Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/32—Modifications of amplifiers to reduce non-linear distortion
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/181—Low-frequency amplifiers, e.g. audio preamplifiers
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
    • H03F3/21—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers with semiconductor devices only
    • H03F3/217—Class D power amplifiers; Switching amplifiers
    • H03F3/2173—Class D power amplifiers; Switching amplifiers of the bridge type
    • 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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2200/00—Indexing scheme relating to amplifiers
    • H03F2200/03—Indexing scheme relating to amplifiers the amplifier being designed for audio applications
    • 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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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Amplifiers (AREA)

Abstract

A kind of high efficiency full-bridge active clamp Mono-pole switch power amplifier provided by the invention, including half-bridge inversion circuit, frequency converter, active clamp circuit, transformer；The half-bridge inversion circuit, frequency converter, active clamp circuit are connected by transformer.The power amplifier is the Mono-pole switch power amplifier using bipolarity phase shift modulation, by using full-bridge active clamp circuit, the circuit is made to have the characteristics that high efficiency, low underloading power consumption, the amplification of low distortion audio.

Description

A kind of high efficiency full-bridge active clamp Mono-pole switch power amplifier
Technical field
The present invention relates to a kind of high efficiency full-bridge active clamp Mono-pole switch power amplifiers, belong to electricity field.
Background technology
Two stage power converts and high switching loss causes traditional D classes power amplification system whole efficiency not high.By High Frequency Link list Grade inverter amplifies applied to audio, can realize single-stage power conversion and reduce switching loss by PWM wave type frequency multiplication, effectively Improve power amplification efficiency.But single-stage inverter filter inductance electric current and leakage inductance electric current quilt in frequency converter change of current dead time It blocks, and then causes serious peak voltage at frequency converter switching tube both ends, lead to very high voltage stress and output electricity Corrugating is distorted.In addition, audio switch power amplifier is usually operated at high frequency state to realize that low distortion amplifies, and when its major part It works under underloading or static conditions so that accounting of the underloading power consumption in whole system power consumption is very big.Therefore, cycle is realized The reliable change of current of converter is realizing high efficiency, low underloading power consumption and low output voltage distortion, is being that single-stage inversion transformation technique is put in audio The critical issue solved is needed in big application.
Invention content
Technical problem：In order to solve the defects of prior art, the present invention provides a kind of high efficiency full-bridge active clamp lists Grade close power amplifier circuit.
Technical solution：A kind of high efficiency full-bridge active clamp Mono-pole switch power amplifier provided by the invention, including half-bridge Inverter circuit, frequency converter, active clamp circuit, transformer；
The half-bridge inversion circuit includes switching tube SP1, switching tube SP2, capacitance CP1, capacitance CP2, direct-current input power supplying Vdc； The switching tube SP1Source electrode and switching tube SP2Drain electrode connection, and with capacitance CP1With capacitance CP2Series circuit it is in parallel, it is in parallel Circuit both ends respectively with direct-current input power supplying VdcAnode connected with cathode；
The active clamp circuit includes switching tube SC1, switching tube SC2, switching tube SC3, switching tube SC4, diode D1, two Pole pipe D2, capacitance Cc；The switching tube SC1Source electrode and switching tube SC2Drain electrode connection；The switching tube SC3Source electrode and switch Pipe SC4Drain electrode connection；The switching tube SC1Drain electrode, switching tube SC3Drain electrode, diode D1Cathode and capacitance CcOne end connects It connects；The switching tube SC2Source electrode, switching tube SC4Source electrode, diode D2Anode and capacitance CcThe other end connection；Two level Pipe D1Anode, diode D2Cathode connection, and connect with the one end filter inductance L；
The half-bridge inversion circuit, frequency converter, active clamp circuit are connected by transformer；
The frequency converter circuit includes switching tube S1, switching tube S2, switching tube S4, switching tube S3；The switching tube S1 Source electrode and switching tube S2Source electrode connect to form two-way switch pipe S1-S2；The switching tube S3Source electrode and switching tube S4Source Pole connects to form two-way switch pipe S3-S4；
The transformer includes a primary coil, two secondary coils and pair side leakage inductance Lk1With secondary side leakage inductance Lk2, just Grade coil one end is connected to switching tube SP1Source electrode and switching tube SP2Drain electrode between, the other end is connected to capacitance CP1With capacitance CP2Between, the first secondary coil, the pair side leakage inductance L of transformerk1, two-way switch pipe S1-S2, two-way switch pipe S3-S4, secondary side leakage Feel Lk2, second subprime coil be sequentially connected cyclization；Switching tube S2Drain electrode and switching tube S4Drain electrode connection, and and filter inductance One end of L connects；The other end of filter inductance L is formed by parallel circuit with filter capacitor C and load resistance R and connect；Filter Wave capacitance C and load R are formed by parallel circuit other end and are connect with reference ground；
Secondary side leakage inductance Lk1With switching tube S1Drain electrode between with switching tube SC1Source electrode and switching tube SC2Drain electrode between connect It connects, secondary side leakage inductance Lk2With switching tube S3Drain electrode between with switching tube SC3Source electrode and switching tube SC4Drain electrode between connect, two Pole pipe D1Anode and diode D2Cathode between with switching tube S2Drain electrode and switching tube S4Drain electrode between connect.
Advantageous effect：Power amplifier provided by the invention is using bipolarity phase shift modulation (Bipolar Phase Shift Modulation, BPSM) Mono-pole switch power amplifier (Single-stage Switching Amplifier, SSA) circuit, pass through Using full-bridge active clamp (Full bridge active clamp, FBAC) circuit, make the circuit that there is high efficiency, low underloading The characteristics of power consumption, amplification of low distortion audio.
Description of the drawings
Fig. 1 is high efficiency full-bridge active clamp Mono-pole switch power amplifier figure.
Fig. 2 is BPSM-FBAC-SSA modulation timing oscillograms.
Fig. 3 is BPSM-FBAC-SSA drive waveforms generation circuit figures.
Fig. 4 is transformer secondary E points, F points and P point voltage oscillograms.As shown in Figure 4, using active clamp circuit, transformation Any due to voltage spikes is not present in device secondary voltage.
Fig. 5 is the P point voltage waveforms and output voltage waveforms when exporting sine 16.7kHz signals, it can be seen that is being exported When high-frequency signal, output voltage has very high waveform quality.
Specific implementation mode
High efficiency full-bridge active clamp Mono-pole switch power amplifier of the present invention is further illustrated below.
High efficiency full-bridge active clamp Mono-pole switch power amplifier, is shown in Fig. 1, including half-bridge inversion circuit, frequency converter, Active clamp circuit, transformer；
The half-bridge inversion circuit includes switching tube SP1, switching tube SP2, capacitance CP1, capacitance CP2, direct-current input power supplying Vdc； The switching tube SP1Source electrode and switching tube SP2Drain electrode connection, and with capacitance CP1With capacitance CP2Series circuit it is in parallel, it is in parallel Circuit both ends respectively with direct-current input power supplying VdcAnode connected with cathode；
The active clamp circuit includes switching tube SC1, switching tube SC2, switching tube SC3, switching tube SC4, diode D1, two Pole pipe D2, capacitance Cc；The switching tube SC1Source electrode and switching tube SC2Drain electrode connection；The switching tube SC3Source electrode and switch Pipe SC4Drain electrode connection；The switching tube SC1Drain electrode, switching tube SC3Drain electrode, diode D1Cathode and capacitance CcOne end connects It connects；The switching tube SC2Source electrode, switching tube SC4Source electrode, diode D2Anode and capacitance CcThe other end connection；Two level Pipe D1Anode, diode D2Cathode connection, and connect with the one end filter inductance L；
The half-bridge inversion circuit, frequency converter, active clamp circuit are connected by transformer；
The frequency converter circuit includes switching tube S1, switching tube S2, switching tube S4, switching tube S3；The switching tube S1 Source electrode and switching tube S2Source electrode connect to form two-way switch pipe S1-S2；The switching tube S3Source electrode and switching tube S4Source Pole connects to form two-way switch pipe S3-S4；
The transformer includes a primary coil, two secondary coils and pair side leakage inductance Lk1With secondary side leakage inductance Lk2, just Grade coil one end is connected to switching tube SP1Source electrode and switching tube SP2Drain electrode between, the other end is connected to capacitance CP1With capacitance CP2Between, the first secondary coil, the pair side leakage inductance L of transformerk1, two-way switch pipe S1-S2, two-way switch pipe S3-S4, secondary side leakage Feel Lk2, second subprime coil be sequentially connected cyclization；Switching tube S2Drain electrode and switching tube S4Drain electrode connection, and and filter inductance One end of L connects；The other end of filter inductance L is formed by parallel circuit with filter capacitor C and load resistance R and connect；Filter Wave capacitance C and load R are formed by parallel circuit other end and are connect with reference ground；
Secondary side leakage inductance Lk1With switching tube S1Drain electrode between with switching tube SC1Source electrode and switching tube SC2Drain electrode between connect It connects, secondary side leakage inductance Lk2With switching tube S3Drain electrode between with switching tube SC3Source electrode and switching tube SC4Drain electrode between connect, two Pole pipe D1Anode and diode D2Cathode between with switching tube S2Drain electrode and switching tube S4Drain electrode between connect.
The operation principle of the circuit is：
BPSM FBAC-SSA circuits are as shown in Figure 1, Vdc is input voltage；CP1~CP2With SP1~SP2Constitute semi-bridge inversion Circuit；Two-way switch pipe S1/S2And S3/S4Constitute frequency converter, SC1~SC4For switching tube；Capacitance CcBoth end voltage is vCc；D1 And D2For diode；L and C is respectively filter inductance and filter capacitor；R is load resistance；voFor output voltage.The original of transformer Secondary side turn ratio Np:Ns1:Ns2=n:1:1.Input current iin, exciting current iLm, primary current ip, leakage inductance electric current iLk1、iLk2, pincers Position capacitance current iCcAnd filter inductance electric current iLReference direction it is as shown in Figure 1.
FBAC-BPSM-SSA circuit modulation timing oscillograms are as shown in Figure 2.VsawFor sawtooth carrier wave, amplitude is ± Vm；T For carrier cycle；vinFor audio input signal；VPFor filter P point voltages, ripple frequency is switching frequency 1/TS2 times. By carrier signal VsawTwo divided-frequency obtains primary side switch pipe drive signal SP1And SP2, SP1With SP2For complementary square wave, active switch pipe Drive signal SC1/SC4And SC2/SC3With primary side drive signal SP1And SP2It keeps synchronizing.Audio input signal vinWith carrier signal VsawRising edge relatively obtains two-way switch pipe drive signal S1/S2, S3/S4With S1/S2It is complementary.
S1/S2And S3/S4Respectively with respect to SP1And SP2Phase shift, by audio input signal vinModulation.Work as vinIn ± VMBetween become When change, VPDuty ratio d change therewith, VPIt obtains exporting electric v after LPF is filteredo.Primary voltage of transformer VABAmplitude is Vdc/ 2, transformer secondary E points are V with F point voltage magnitudesdc/2n.Work as vin=+VmWhen, S1/S2With SP1It simultaneously turns on, S3/S4With SP2Together When be connected, d=1, vo=Vdc/2n；Work as vin=-VmWhen, S1/S2With SP2It simultaneously turns on, S3/S4With SP1It simultaneously turns on, d=0, vo =-Vdc/2n；Work as vinWhen=0, d=0.5, at this time vo=0.It is approximately considered inductive current not in a switch periods start/stop time Become, then can be obtained according to filter inductance L voltage-second balances
It can be obtained by formula (1)
Duty ratio d and carrier amplitude VM, audio input signal vinMeet relationship
Convolution (2) and formula (3) can obtain
By formula (4) it is found that working as voltage VdcWhen constant, output voltage voWith input audio signal vinIt is linear, it can be with Realize Linear Amplifer, amplification factor Vdc/(2nVm).It follows that the open loop gain amplifier of BPSM FBAC-SSA is compared to half Bridge D class power amplifiers[80]It is proportionality coefficient to introduce transformer turns ratio n, i.e. BPSM FBAC-SSA realize direct current by no-load voltage ratio n and supply Piezoelectric voltage is converted.Therefore, by rationally designing transformer turns ratio, (full-bridge circuit, half-bridge circuit are recommended with primary side inverter bridge Circuit), BPSM FBAC-SSA can be applied to low-voltage power supply or high voltage supply occasion.
Fig. 3 gives BPSM FBAC-SSA drive waveforms generation circuits, after audio input signal is compared with carrier signal Obtain PWM wave.The rising edge and failing edge of PWM wave, sent respectively to two d type flip flops realize frequency reducings with generate primary side switch pipe with The drive signal of frequency converter switching tube.Dead zone signals between complementary drive signals are produced by RC circuits and AND gate circuit It is raw.Drive generating principle as shown in Figure 3 it is found that BPSM FBAC-SSA are without detecting zero cross signal, there is no because zero passage detection with And intermodulation distortion problem caused by driving pulse switching.In addition, although BPSM FBAC-SSA have used 10 switching tubes, and Independent drive signal only has 6, it is only necessary to use 6 isolation drives.
Still further aspect, BPSM FBAC can realize that analog feedback is controlled as traditional two-stage close power amplifier.Single-stage is inverse Become device and be applied to audio amplification occasion, system bandwidth requirement is sufficiently wide to realize that wide frequency ranges audio signal is amplified.It compares In digital control, there is analog control mode higher resolution ratio and lower loop to be delayed, can be under the conditions of same band It obtains higher gain around feedback and is distorted with to reduce output voltage and promotes power amplifier performance.
In frequency converter dead time, diode D1With D2Respectively in filter inductance electric current iLIt is with for timing to be negative It provides freewheeling path.And leakage inductance electric current iLk1And iLk2Then pass through switching tube S respectivelyC1~SC2With SC3~SC4In frequency converter Afterflow is realized in dead time.FBAC circuits reality while filter inductance energy and leakage inductance energy are showed and have recycled, has improved system effect Rate.Switching tube SC1~SC4With primary side switch pipe SP1~SP2Synchronous working realizes bi-directional energy flow, keeps clamp capacitor voltage Stablize.The energy of clamp capacitor recycling can be transmitted to rapidly DC power supply terminal or load end during switching tube is connected.This Outside, FBAC eliminates the due to voltage spikes at frequency converter both ends, reduces two-way switch tube voltage stress, and reduce output voltage Distortion.Frequency converter both ends E points, F points and P point voltages realize clamper, this is also that frequency converter switching tube is real simultaneously Existing ZVS creates condition.Furthermore diode D1And D2Can be filter inductance energy during short-circuit protection occurs for load current Flow passage is provided, avoids damaging switching tube because inductance current is mutated.

Claims (1)

1. a kind of high efficiency full-bridge active clamp Mono-pole switch power amplifier, it is characterised in that：Including half-bridge inversion circuit, cycle Converter, active clamp circuit, transformer；
The half-bridge inversion circuit includes switching tube SP1, switching tube SP2, capacitance CP1, capacitance CP2, direct-current input power supplying Vdc；It is described Switching tube SP1Source electrode and switching tube SP2Drain electrode connection, and with capacitance CP1With capacitance CP2Series circuit it is in parallel, parallel circuit Both ends respectively with direct-current input power supplying VdcAnode connected with cathode；
The active clamp circuit includes switching tube SC1, switching tube SC2, switching tube SC3, switching tube SC4, diode D1, diode D2, capacitance Cc；The switching tube SC1Source electrode and switching tube SC2Drain electrode connection；The switching tube SC3Source electrode and switching tube SC4Drain electrode connection；The switching tube SC1Drain electrode, switching tube SC3Drain electrode, diode D1Cathode and capacitance CcOne end connects It connects；The switching tube SC2Source electrode, switching tube SC4Source electrode, diode D2Anode and capacitance CcThe other end connection；Two level Pipe D1Anode, diode D2Cathode connection, and connect with the one end filter inductance L；
The half-bridge inversion circuit, frequency converter, active clamp circuit are connected by transformer；
The frequency converter circuit includes switching tube S1, switching tube S2, switching tube S3, switching tube S4；The switching tube S1Source Pole and switching tube S2Source electrode connect to form two-way switch pipe S1-S2；The switching tube S3Source electrode and switching tube S4Source electrode connect It connects to form two-way switch pipe S3-S4；
The transformer includes a primary coil, two secondary coils and pair side leakage inductance Lk1With secondary side leakage inductance Lk2, primary line Circle one end is connected to switching tube SP1Source electrode and switching tube SP2Drain electrode between, the other end is connected to capacitance CP1With capacitance CP2It Between, the first secondary coil, the pair side leakage inductance L of transformerk1, two-way switch pipe S1-S2, two-way switch pipe S3-S4, pair side leakage inductance Lk2、 Second subprime coil is sequentially connected cyclization；Switching tube S2Drain electrode and switching tube S4Drain electrode connection, and with the one of filter inductance L End connection；The other end of filter inductance L is formed by parallel circuit with filter capacitor C and load resistance R and connect；Filter capacitor C and load R are formed by parallel circuit other end and are connect with reference ground；
Secondary side leakage inductance Lk1With switching tube S1Drain electrode between with switching tube SC1Source electrode and switching tube SC2Drain electrode between connect, it is secondary Side leakage inductance Lk2With switching tube S3Drain electrode between with switching tube SC3Source electrode and switching tube SC4Drain electrode between connect, diode D1 Anode and diode D2Cathode between with switching tube S2Drain electrode and switching tube S4Drain electrode between connect.
CN201810522462.8A 2018-05-28 2018-05-28 A kind of high efficiency full-bridge active clamp Mono-pole switch power amplifier Withdrawn CN108471253A (en)

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CN114257113A (en) * 2021-11-15 2022-03-29 湖南大学 Active clamping type high-frequency link inverter
CN115173730A (en) * 2022-07-08 2022-10-11 青岛理工大学 Safe current conversion method of single-stage high-frequency isolation converter for bidirectional power transmission
RU216722U1 (en) * 2022-09-13 2023-02-22 Федеральное государственное бюджетное образовательное учреждение высшего образования "Санкт-Петербургский государственный институт кино и телевидения" (СПбГИКиТ) Amplifying-converting device
US11804782B2 (en) 2022-01-28 2023-10-31 Analog Devices, Inc. Active-clamp current-fed push-pull converter for bidirectional power transfer

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CN106374752A (en) * 2016-07-12 2017-02-01 广东锐顶电力技术有限公司 Single-stage three-level power amplifier circuit
CN208158459U (en) * 2018-05-28 2018-11-27 钟曙 A kind of high efficiency full-bridge active clamp Mono-pole switch power amplifier

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114257113A (en) * 2021-11-15 2022-03-29 湖南大学 Active clamping type high-frequency link inverter
US11804782B2 (en) 2022-01-28 2023-10-31 Analog Devices, Inc. Active-clamp current-fed push-pull converter for bidirectional power transfer
CN115173730A (en) * 2022-07-08 2022-10-11 青岛理工大学 Safe current conversion method of single-stage high-frequency isolation converter for bidirectional power transmission
RU216722U1 (en) * 2022-09-13 2023-02-22 Федеральное государственное бюджетное образовательное учреждение высшего образования "Санкт-Петербургский государственный институт кино и телевидения" (СПбГИКиТ) Amplifying-converting device

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Application publication date: 20180831