CN208158459U - 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 PDFInfo
- Publication number
- CN208158459U CN208158459U CN201820802228.6U CN201820802228U CN208158459U CN 208158459 U CN208158459 U CN 208158459U CN 201820802228 U CN201820802228 U CN 201820802228U CN 208158459 U CN208158459 U CN 208158459U
- Authority
- CN
- China
- Prior art keywords
- switching tube
- drain electrode
- capacitor
- source electrode
- circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Amplifiers (AREA)
Abstract
A kind of high efficiency full-bridge active clamp Mono-pole switch power amplifier provided by the utility model, 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
Technical field
The utility model relates to a kind of high efficiency full-bridge active clamp Mono-pole switch power amplifiers, belong to electricity field.
Background technique
Two stage power transformation and high switching loss cause traditional D class power amplification system whole efficiency not high.By High Frequency Link list
Grade inverter amplifies applied to audio, can be realized single-stage power conversion and reduces 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 distortion.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 for needing to solve in big application.
Utility model content
Technical problem：In order to solve the defects of prior art, the utility model provides a kind of active pincers of high efficiency full-bridge
Position Mono-pole switch power amplifier.
Technical solution：A kind of high efficiency full-bridge active clamp Mono-pole switch power amplifier provided by the utility model, including
Half-bridge inversion circuit, frequency converter, active clamp circuit, transformer；
The half-bridge inversion circuit includes switching tube SP1, switching tube SP2, capacitor CP1, capacitor CP2, direct-current input power supplying Vdc；
The switching tube SP1Source electrode and switching tube SP2Drain electrode connection, and with capacitor CP1With capacitor 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, capacitor 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 capacitor CcOne end connects
It connects；The switching tube SC2Source electrode, switching tube SC4Source electrode, diode D2Anode and capacitor CcThe other end connection；Second 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 capacitor CP1With capacitor
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 capacitor C and load R is formed by parallel circuit other end and connect with reference；
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.
Beneficial effect：Power amplifier provided by the utility model is using bipolarity phase shift modulation (Bipolar Phase
Shift Modulation, BPSM) Mono-pole switch power amplifier (Single-stage Switching Amplifier, SSA) electricity
Road has the circuit efficient by using full-bridge active clamp (Full bridge active clamp, FBAC) circuit
The characteristics of rate, low underloading power consumption, amplification of low distortion audio.
Detailed description of the invention
Fig. 1 is high efficiency full-bridge active clamp Mono-pole switch power amplifier figure.
Fig. 2 is BPSM-FBAC-SSA modulation timing waveform diagram.
Fig. 3 is BPSM-FBAC-SSA drive waveforms generation circuit figure.
Fig. 4 is transformer secondary E point, F point and P point voltage oscillogram.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 waveform and output voltage waveforms when exporting sine 16.7kHz signal, it can be seen that is being exported
When high-frequency signal, output voltage has very high waveform quality.
Specific embodiment
The utility model high efficiency full-bridge active clamp Mono-pole switch power amplifier 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, capacitor CP1, capacitor CP2, direct-current input power supplying Vdc；
The switching tube SP1Source electrode and switching tube SP2Drain electrode connection, and with capacitor CP1With capacitor 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, capacitor 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 capacitor CcOne end connects
It connects；The switching tube SC2Source electrode, switching tube SC4Source electrode, diode D2Anode and capacitor CcThe other end connection；Second 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 capacitor CP1With capacitor
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 capacitor C and load R is formed by parallel circuit other end and connect with reference；
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 working principle of the circuit is：
BPSM FBAC-SSA circuit is 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；Capacitor 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 waveform diagram is as shown in Figure 2.VsawFor sawtooth carrier wave, amplitude is ± Vm；T
For carrier cycle；vinFor audio input signal；VPFor filter P point voltage, ripple frequency is switching frequency 1/TS2 times.
By carrier signal VsawTwo divided-frequency obtains primary side switch pipe driving signal SP1And SP2, SP1With SP2For complementary square wave, active switch pipe
Driving signal SC1/SC4And SC2/SC3With primary side driving signal SP1And SP2It keeps synchronizing.Audio input signal vinWith carrier signal
VsawRising edge relatively obtains two-way switch pipe driving 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 point and F point voltage magnitude are Vdc/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.Inductive current is approximately considered not in a switch periods start/stop time
Become, then can be obtained according to filter inductance L voltage-second balance
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 amplifier[80]Introducing transformer turns ratio n is proportionality coefficient, i.e. BPSM FBAC-SSA realizes direct current by no-load voltage ratio n and supplies
Piezoelectric voltage conversion.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 circuit, 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 driving signal of frequency converter switching tube.Dead zone signals between complementary drive signals are produced by RC circuit and AND gate circuit
It is raw.Drive generating principle as shown in Figure 3 it is found that BPSM FBAC-SSA is 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 has used 10 switching tubes, and
Independent driving 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 negative and is with for timing
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 circuit 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 conduction of the switch tube.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 point, F point and P point voltage realize clamper, this is also real for frequency converter switching tube simultaneously
Existing ZVS is created condition.Furthermore diode D1And D2It can 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, capacitor CP1, capacitor CP2, direct-current input power supplying Vdc；It is described
Switching tube SP1Source electrode and switching tube SP2Drain electrode connection, and with capacitor CP1With capacitor 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, capacitor 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 capacitor CcOne end connects
It connects；The switching tube SC2Source electrode, switching tube SC4Source electrode, diode D2Anode and capacitor CcThe other end connection；Second 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 capacitor CP1With capacitor 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 one with 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 is formed by parallel circuit other end and connect with reference；
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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820802228.6U CN208158459U (en) | 2018-05-28 | 2018-05-28 | A kind of high efficiency full-bridge active clamp Mono-pole switch power amplifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820802228.6U CN208158459U (en) | 2018-05-28 | 2018-05-28 | A kind of high efficiency full-bridge active clamp Mono-pole switch power amplifier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208158459U true CN208158459U (en) | 2018-11-27 |
Family
ID=64388457
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820802228.6U Expired - Fee Related CN208158459U (en) | 2018-05-28 | 2018-05-28 | A kind of high efficiency full-bridge active clamp Mono-pole switch power amplifier |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208158459U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108471253A (en) * | 2018-05-28 | 2018-08-31 | 钟曙 | A kind of high efficiency full-bridge active clamp Mono-pole switch power amplifier |
-
2018
- 2018-05-28 CN CN201820802228.6U patent/CN208158459U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108471253A (en) * | 2018-05-28 | 2018-08-31 | 钟曙 | A kind of high efficiency full-bridge active clamp Mono-pole switch power amplifier |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100353654C (en) | Cascading bidirectional DC-DC converter | |
| CN101488718B (en) | Voltage multiplying synchronous rectifying multi-resonance soft switching converter | |
| CN104734520A (en) | DC/DC converter | |
| CN106505866B (en) | A kind of three Level Full Bridge DC converters | |
| CN105245113B (en) | The anti-straight-through Sofe Switch of one kind recommends LLC resonant converter | |
| CN102624246B (en) | Single-ended forward parallel push-pull type high-power converter | |
| CN102075071B (en) | Compensation control circuit beneficial to harmonic reduction of active flyback power factor correction device | |
| CN105048850B (en) | A kind of single-stage ZVS types push-pull type high frequency link DC/AC converters | |
| CN108471253A (en) | A kind of high efficiency full-bridge active clamp Mono-pole switch power amplifier | |
| CN105553272A (en) | Straight-through prevention half-bridge LLC resonance converter | |
| CN102231600A (en) | Novel full-bridge soft switch circuit applied to arc welding inverter power supply | |
| CN1195349C (en) | Lay loop current control type double dropping half bridge convertor | |
| CN114039482A (en) | Single-stage resonant power factor correction circuit with bridgeless structure | |
| CN104779805A (en) | Phase-shifted full-bridge ZVS convertor with wide load range | |
| CN208158459U (en) | A kind of high efficiency full-bridge active clamp Mono-pole switch power amplifier | |
| CN202550893U (en) | Single-ended forward parallel push-pull type large-power converter | |
| CN100429863C (en) | Isolated driving circuit for insulated gate power transistor in single-end converter | |
| CN110212770A (en) | Soft switch back exciting converter | |
| CN114157150A (en) | High-gain bidirectional Y source-LLC isolation direct current-direct current converter | |
| CN208257666U (en) | A kind of three switch push-pulls input High Frequency Link single-stage inverter circuit | |
| CN208158440U (en) | A kind of single-stage and two points one channel switch power amplifier of two-stage mixed high-efficient rate low distortion | |
| CN201563063U (en) | Multi-resonance soft switch converter | |
| CN108736758B (en) | Double-buck full-bridge grid-connected inverter based on frequency multiplication modulation | |
| CN108712083A (en) | A kind of three switch push-pulls input High Frequency Link single-stage inverter circuit | |
| CN107154683B (en) | A kind of inductively coupled power transfer device and control method with pull-up auxiliary switch |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181127 Termination date: 20200528 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |