CN103825562B - FET power amplifier and system - Google Patents
FET power amplifier and system Download PDFInfo
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- CN103825562B CN103825562B CN201210469805.1A CN201210469805A CN103825562B CN 103825562 B CN103825562 B CN 103825562B CN 201210469805 A CN201210469805 A CN 201210469805A CN 103825562 B CN103825562 B CN 103825562B
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Abstract
The invention discloses a kind of FET power amplifier and system.Wherein, the FET power amplifier includes：Circuit is controlled, for monochromatic simulation signal to be converted into data signal, and output digit signals；Four integrated drive electronics, the first port of each integrated drive electronics is connected with control circuit respectively, second port is connected with a fet power switch pipe respectively, it is converted into for receiving data signal, and by data signal for controlling each fet power switch pipe ON time or the drive signal of turn-off time；Output power transformer, is connected with each fet power switch pipe, in the case where controlling leading-bridge or lagging leg to turn on by drive signal, exporting the power after amplification；Wherein, leading-bridge or lagging leg respectively include two fet power switch pipes.By means of the invention it is possible to realize the powerful power amplifier of output, and cause the power amplifier reaches to design simple, small volume.
Description
Technical field
The present invention relates to circuit field, in particular to a kind of FET power amplifier and system.
Background technology
At present, myriametric wave, long wave, medium-wave power amplifier generally use electricity in fields such as communication, broadcast, navigation, time services
Son pipe is realized with FET.The booster output that electron tube is realized is big but has that efficiency is low, needs filament pre-heating, can not open
Defect i.e., and the service life of electron tube is shorter；And the cell power for the amplifier that FET is realized is small, at present only
There are 5kW, but efficiency high, and the device service life of FET is very long.
Continuous improvement with military communication and civil area to the power amplification requirement of power amplifier, prior art is real
Existing FET amplifier can not meet more powerful demand.
From the foregoing, it will be observed that the FET power amplifier circuit realized currently for above-mentioned prior art is complicated, volume
Greatly, and powerful problem can not be exported, effective solution is not yet proposed at present.
The content of the invention
FET power amplifier circuit complexity, the volume realized for correlation technique are big, and can not export big work(
The problem of rate, effective solution is not yet proposed at present, therefore, it is a primary object of the present invention to provide a kind of FET
Power amplifier and system, to solve the above problems.
To achieve these goals, according to an aspect of the invention, there is provided a kind of FET power amplifier, is somebody's turn to do
FET power amplifier includes：Circuit is controlled, for monochromatic simulation signal to be converted into data signal, and digital letter is exported
Number；Four integrated drive electronics, the first port of each integrated drive electronics is connected with control circuit respectively, second port difference
It is connected, is converted into for receiving data signal, and by data signal for controlling each with a fet power switch pipe
Effect power switch pipe ON time or the drive signal of turn-off time；Output power transformer, is opened with each fet power
Pipe connection is closed, in the case where controlling leading-bridge or lagging leg to turn on by drive signal, exporting the work(after amplification
Rate；Wherein, leading-bridge or lagging leg respectively include two fet power switch pipes.
Further, the G ports of the first integrated drive electronics are connected to the grid of the first fet power switch pipe, and
The drain electrode of one fet power switch pipe is connected to supply voltage via the first inductance and the first fuse；Second integrated driving electricity
The G ports on road are connected to the grid of the second fet power switch pipe, and the drain electrode and first of the second fet power switch pipe
The source electrode connection of integrated drive electronics, the source ground of the second fet power switch pipe；The G ports of 4th integrated drive electronics
Be connected to the grid of the 4th fet power switch pipe, and the 4th fet power switch pipe source electrode via the second inductance and
Two fuses are connected to supply voltage；The G ports of 3rd integrated drive electronics are connected to the grid of the 3rd fet power switch pipe
Pole, and the source electrode of the 3rd fet power switch pipe is connected with the drain electrode of the 4th integrated drive electronics, the 3rd fet power is opened
Close the grounded drain of pipe；The first end for synthesizing the primary coil of transformer is opened via the first capacitance connection in the second fet power
Close the drain electrode of pipe and the first node on the source electrode connecting path of the first integrated drive electronics, and the primary coil of synthesis transformer
The second end be connected on the drain electrode connecting path of the source electrode of the 4th fet power switch pipe and the 3rd integrated drive electronics
Section Point；Wherein, when simultaneously drive signal controls the first fet power switch pipe and the 3rd fet power switch pipe to lead
It is logical, and the second fet power switch pipe and the 4th fet power switch pipe, when simultaneously turning off, supply voltage is applied to synthesis
On the primary coil of transformer, and by exporting amplifying power after magnetic coupling；Or, when drive signal controls the second field-effect
Power switch pipe and the 4th fet power switch pipe are simultaneously turned on, and the first fet power switch pipe and the 3rd field-effect work(
When rate switching tube is simultaneously turned off, supply voltage is applied on the primary coil of synthesis transformer, and by being exported after magnetic coupling
Amplifying power.
Further, FET power amplifier also includes：First diode, the positive pole of the first diode is connected to
The source electrode of two fet power switch pipes, the negative pole of the first diode is connected to first node, so that proper drive signal is controlled
First fet power switch pipe shut-off after, and control the second fet power switch pipe do not turn on before, control synthesis become
Current stream on the primary coil of depressor.
Further, FET power amplifier also includes：Second diode, the positive pole of the second diode is connected to
The drain electrode of four fet power switch pipes, the negative pole of the second diode is connected to Section Point, so that proper drive signal is controlled
After the conducting of second fet power switch pipe, and before the 4th fet power switch pipe is not turned off, control synthesis transformer
Primary coil on electric current returned via the second diode.
Further, FET power amplifier also includes：3rd diode, the positive pole of the 3rd diode is connected to
One node, the negative pole of the 3rd diode is connected to supply voltage, so that proper drive signal controls the second fet power switch
After pipe shut-off, and before the first fet power switch pipe is not turned on, the electric current on the primary coil of control synthesis transformer
Afterflow.
Further, FET power amplifier also includes：4th diode, the positive pole of the 4th diode is connected to
Two nodes, the negative pole of the 4th diode is connected to supply voltage, so that proper drive signal controls the first fet power switch
After pipe conducting, and before the 3rd fet power switch pipe is not turned on, the electric current on the primary coil of control synthesis transformer
Returned via the 4th diode.
Further, FET power amplifier also includes：Second electric capacity and the 3rd electric capacity, two electric capacity are connected in parallel
First end afterwards is connected to supply voltage, the second end ground connection, for DC filtering and energy storage.
Further, FET power amplifier also includes：First resistor and the 4th electric capacity, first resistor and the 4th electricity
Hold after series connection, one end and the first inductance connection, the other end are grounded, for absorbing the higher-order of oscillation；Second resistance and the 5th electric capacity,
After second resistance and the series connection of the 5th electric capacity, one end and the second inductance connection, other end ground connection, for absorbing the higher-order of oscillation.
Further, each integrated drive electronics includes：Circuit is detected, for detecting DK ends in integrated drive electronics in real time
Magnitude of voltage between mouth and SK ports, in the case where determining that over-current phenomenon avoidance occurs for integrated drive electronics according to magnitude of voltage, block
Integrated drive electronics output drive signal；Processor, the block number of times of drive signal is blocked for recording integrated drive electronics, and
In the case where block number of times exceedes predetermined value, then send and completely close off signal to cause integrated drive electronics to terminate automatic unlocking
Function.
To achieve these goals, according to another aspect of the present invention there is provided a kind of FET power amplifying system,
The system includes：Including any one above-mentioned FET power amplifier, FET power amplifying system also includes：Excitation
Device, is connected with control circuit, for providing monochromatic simulation signal.
By the present invention, using control circuit, for monochromatic simulation signal to be converted into data signal, and digital letter is exported
Number；Four integrated drive electronics, the first port of each integrated drive electronics is connected with control circuit respectively, second port difference
It is connected, is converted into for receiving data signal, and by data signal for controlling each with a fet power switch pipe
Effect power switch pipe ON time or the drive signal of turn-off time；Output power transformer, is opened with each fet power
Pipe connection is closed, in the case where controlling leading-bridge or lagging leg to turn on by drive signal, exporting the work(after amplification
Rate；Wherein, leading-bridge or lagging leg respectively include two fet power switch pipes, solve related art and are realized
FET power amplifier circuit is complicated, volume is big, and powerful problem can not be exported, and then realize that output is high-power
Power amplifier, and cause the power amplifier to reach that design is simple, the effect of small volume.
Brief description of the drawings
Accompanying drawing described herein is used for providing a further understanding of the present invention, constitutes the part of the application, this hair
Bright schematic description and description is used to explain the present invention, does not constitute inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is the structural representation of FET power amplifier according to embodiments of the present invention；
Fig. 2 is the circuit diagram of the FET power amplifier according to embodiment illustrated in fig. 1；
Fig. 3 is the pulse sequence schematic diagram of the drive signal according to Fig. 1 and embodiment illustrated in fig. 2.
Embodiment
It should be noted that in the case where not conflicting, the feature in embodiment and embodiment in the application can phase
Mutually combination.Describe the present invention in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
Fig. 1 is the structural representation of FET power amplifier according to embodiments of the present invention；Fig. 2 is according to Fig. 1 institutes
Show the circuit diagram of the FET power amplifier of embodiment.
As shown in figure 1, the FET power amplifier includes：Circuit is controlled, for monochromatic simulation signal to be converted to
Data signal, and output digit signals；Four integrated drive electronics, the first port of each integrated drive electronics respectively with control
Circuit is connected, and second port is connected with a fet power switch pipe respectively, for receiving data signal, and by data signal
It is converted into for controlling each fet power switch pipe ON time or the drive signal of turn-off time；Power output transformation
Device, is connected with each fet power switch pipe, for controlling what leading-bridge or lagging leg were turned on by drive signal
In the case of, the power after output amplification；Wherein, leading-bridge or lagging leg respectively include two fet power switch pipes.
The power amplifier that the above embodiments of the present application are realized uses H bridge type circuit, by phase-shifting full-bridge control, that is, passes through
The data signal that control circuit is provided provides drive signal to be embodied as fet power switch pipe, to control fet power to open
Close pipe it is different when be switched on or off, the time is switched on or off due to every power switch pipe of control, can be close to no-voltage,
Zero point stream is switched, so that the peak voltage, the electric current that reduce the loss of fet power switch pipe and bear, improve transducing effect
Rate, reduces radiator area, and because fet power switch pipe and drive circuit use Integration Design, user
Ripple drives, so as to finally reduce the volume of power amplifier, reduce the complexity of circuit design.And due to using H bridges
Formula circuit is it is achieved thereby that export powerful function.
Specifically, the above-mentioned FET power amplifier of the application uses bridge Phase shifted PWM Controlled, the driver in outside is defeated
Go out after monochromatic simulation signal, control circuit is converted to the analog signal data signal needed for power amplifier, the numeral
Signal is transferred to drive circuit as a kind of control signal.Drive circuit generates drive signal according to control signal, the driving
Signal control field-effect power switch pipe is switched on or off when different, and by controlling the open-minded of every fet power switch pipe
Or the turn-off time, no-voltage, zero point stream switch are close to, what the loss and pipe for reducing fet power switch pipe were born
Peak voltage, electric current.When leading-bridge or lagging leg are turned on, the power amplifier of the application just has the amplification work(of output
Rate, wherein, the two fet power switch pipes referred to as leading-bridge first turned in each cycle, two fields turned on afterwards
Effect power switch pipe is referred to as lagging leg.
From the foregoing, it will be observed that the above embodiments of the present application solve the FET power amplifier that related art is realized
Circuit is complicated, volume is big, and the problem of high-power voltage can not be exported, and then the powerful power amplifier of output is realized, and
So that the power amplifier, which reaches, designs the simple, effect of small volume.
As illustrated in fig. 1 and 2, in the FET power amplifier that the above embodiments of the present application are realized, first is integrated
Drive circuit A1 G ports are connected to the first fet power switch pipe V1 grid, and the first fet power switch pipe V1
Drain electrode be connected to supply voltage via the first inductance and the first fuse；Second integrated drive electronics A2 G ports are connected to
Second fet power switch pipe V2 grid, and the second fet power switch pipe V2 drain electrode and the first integrated drive electronics
A1 source electrode connection, the second fet power switch pipe V2 source ground；4th integrated drive electronics A4 G ports are connected to
4th fet power switch pipe V4 grid, and the 4th fet power switch pipe V4 source electrode via the second inductance and second
Fuse is connected to supply voltage；3rd integrated drive electronics A3 G ports are connected to the 3rd fet power switch pipe V3's
Grid, and the 3rd fet power switch pipe V3 source electrode is connected with the 4th integrated drive electronics A4 drain electrode, the 3rd field-effect
Power switch pipe V3 grounded drain；The first end for synthesizing the primary coil of transformer is imitated via the first capacitance connection in second
Answer power switch pipe V2 drain electrode and the first node on the first integrated drive electronics A1 source electrode connecting path, and synthesis transformation
Second end of the primary coil of device is connected to the 4th fet power switch pipe V4 source electrode and the 3rd integrated drive electronics A3
The Section Point drained on connecting path；Wherein, when drive signal controls first fet power switch pipe V1 and the 3rd effect
Power switch pipe V3 is answered to simultaneously turn on, and the second fet power switch pipe V2 and the 4th fet power switch pipe V4 are closed simultaneously
When disconnected, supply voltage is applied on the primary coil of synthesis transformer, and by exporting amplifying power after magnetic coupling；Or,
When drive signal control the second fet power switch pipe V2 and the 4th fet power switch pipe V4 is simultaneously turned on, and first
When effect power switch pipe V1 and the 3rd fet power switch pipe V3 are simultaneously turned off, supply voltage is applied to synthesis transformer
On primary coil, and by exporting amplifying power after magnetic coupling.In the embodiment, as long as drive signal is realized in a control
Control any one to being turned on compared with the field effect transistor switch pipe on line in cycle, the field effect transistor switch pipe on another diagonal is just
Close, then output end will export amplifying power.
Preferably, as shown in Fig. 2 the FET power amplifier in the above embodiments of the present application can also include：The
One diode V6, the first diode V6 positive pole is connected to the second fet power switch pipe V2 source electrode, the first diode V6
Negative pole be connected to first node so that proper drive signal control the first fet power switch pipe V1 shut-off after, and control
Make before the second fet power switch pipe V2 do not turn on, the current stream on the primary coil of control synthesis transformer.The reality
Applying example realizes in the case where ensureing output amplifying power so that in switching leading-bridge and lagging leg on or off
During, will not due in handoff procedure occur above and below effect power switch pipe（Such as V1 and V2）Straight-through situation, causes hair
The problem of device and power supply are burnt in raw short circuit.
Preferably, the FET power amplifier in the above embodiments of the present application shown in Fig. 2 can also include：Second
Diode, the positive pole of the second diode is connected to the 4th fet power switch pipe V4 drain electrode, and the negative pole of the second diode connects
Section Point is connected to, so that after control the second fet power switch pipe V2 conductings of proper drive signal, and the 4th field-effect
Before power switch pipe V4 is not turned off, the electric current on the primary coil of control synthesis transformer is returned via the second diode.Should
A fast recovery diode V7 is added in embodiment in primary circuit so that clamp process and negative half-cycle current in positive axis
In propagation process, the problem of FET by super-high-current due to causing to damage is prevented.
Preferably, the FET power amplifier in the above embodiments of the present application can also include：3rd diode, the
The positive pole of three diodes is connected to first node, and the negative pole of the 3rd diode is connected to supply voltage, so that proper drive signal
Control after the second fet power switch pipe V2 turns off, and before the first fet power switch pipe V1 is not turned on, control is closed
Current stream on the primary coil of transformer.This embodiment achieves during negative half period power output, it will not cut
During changing leading-bridge and lagging leg on or off, because effect power switch pipe above and below occurring in handoff procedure
（Such as V3 and V4）Straight-through situation, causes occur the problem of device and power supply are burnt in short circuit.
Preferably, the FET power amplifier in the above embodiments of the present application can also include：4th diode, the
The positive pole of four diodes is connected to Section Point, and the negative pole of the 4th diode is connected to supply voltage, so that proper drive signal
Control after the first fet power switch pipe V1 turns on, and before the 3rd fet power switch pipe V3 is not turned on, control is closed
Returned into the electric current on the primary coil of transformer via the 4th diode.The embodiment equally realize prevent FET by
In by super-high-current cause damage.
Fig. 3 is the pulse sequence schematic diagram of the drive signal according to Fig. 1 and embodiment illustrated in fig. 2.
As shown in figure 3, the ON time of every fet power switch pipe in the above embodiments of the present application can be set
To approach half period, i.e., 180 °, therefore, the opposite in phase of same two switching tubes of bridge arm, controller is by controlling integrated drive
The sequential of circuit output drive signal is moved to control ON time and the turn-off time of each fet power switch pipe, meanwhile,
The adjustment power of power amplifier is realized by the output voltage at change+E ends, is supplied by external dc power, so that
Realize that output meets the amplifying power of demand in each complete switching cycles.Come specifically with a complete switching cycles below
The bright present invention, one complete switch periods of control that controller is realized include eight courses of work（Integrated drive electronics
A1 output signal A, integrated drive electronics A2 output signal B, integrated drive electronics A3 output signal C, integrated drive electronics A4 is defeated
Go out signal D）, make a concrete analysis of as follows：
1st, within t0~t1 period, the amplifying power output procedure of positive half cycle is realized.
Understand that specific implementation process is as follows with reference to Fig. 2 and Fig. 3：
In t0~t1 periods, control signal（That is drive signal）Control two FETs of diagonal（V1 and V3）Lead
Logical, i.e., V1, V3 are simultaneously turned on, and make the service time of two pipes and have overlapping part, and the overlapping part time is that diagonal is led
The logical time.When drive signal is overlapped, electric current is from power positive end → F1 → L1 → V1 → C5 → T1 → V3 → power supply negative terminal（+E→F1
→ L1 → V1 → C5 → T1 primary → V3 → GND）, supply voltage is added in transformer, by magnetic coupling, work(
Rate sends second harmonic loop to.
2nd, within t1~t2 period, positive half cycle afterflow process is realized.
Understand that specific implementation process is as follows with reference to Fig. 2 and Fig. 3：
In t1~t2 periods, after V1 shut-offs, V2 is not turned on also, and this time is to prevent same bridge arm upper and lower two from opening
Guan Guan（V1 and V2）Lead directly to and set, according to the switch time of device, set dead time, the time can be by controlling circuit certainly
By adjusting.Because primary inductance value is very big, electric current can not be mutated, so transformer primary current will pass through other devices
Afterflow.Electric current is primary from T1 primary → V3 → GND → V6 → C5 → T1, forms loop.
3rd, within t2~t3 period, positive half cycle clamp process is realized.
Understand that specific implementation process is as follows with reference to Fig. 2 and Fig. 3：
In t2~t3 periods, V2 conductings, V3 is also not turned off.Now left and right bridge mid-point voltage is close to 0V, electric capacity opposite direction
Electric discharge, the sense of current changes.Electric current is from C5 → V2 → GND → V7 → T1 primary → C5.Although still being led in this period V3
It is logical, but because a fast recovery diode of having connected, the branch road and no current pass through.
4th, within t3~t4 period, negative half-cycle current propagation process is realized.
Understand that specific implementation process is as follows with reference to Fig. 2 and Fig. 3：
In t3~t4 periods, V3 shut-offs, V4 are not turned on also, and right bridge mid-point voltage rise, electric current gradually increases, electric current from
T1 primary → C5 → V2 → GND → V7 → T1 is primary.
5th, within t4~t5 period, negative half period power output process is realized.
Understand that specific implementation process is as follows with reference to Fig. 2 and Fig. 3：
In t4~t5 periods, V2, V4 are simultaneously turned on.The sense of current and t0~t1 periods are on the contrary, electric current is from+E → F2
→ L2 → V4 → T1 primary → C5 → V2 → GND, supply voltage is added in transformer, by magnetic coupling, work(
Rate sends second harmonic loop to.
6th, within t5~t6 period, negative half period afterflow process is realized.
Understand that specific implementation process is as follows with reference to Fig. 2 and Fig. 3：
In t5~t6 periods, V2 shut-offs, V1 is not turned on also.Because primary inductance value is very big, electric current can not dash forward
Become, so transformer primary current will pass through other devices afterflow.Electric current from+E → V4 → T1 primary → C5 → V5 → V9 →+E,
Form loop.
7th, within t6~t7 period, realize that negative half period clamps process.
Understand that specific implementation process is as follows with reference to Fig. 2 and Fig. 3：
In t6~t7 periods, V1 conductings, V4 is also not turned off, and now left and right bridge mid-point voltage is close to supply voltage.Electric capacity
Opposite direction is discharged, and the sense of current changes.Electric current is from C5 → T1 primary → V8 → V10 → F1 → L1 → V1 → C5.Although
Time period V4 is still turned on, but because a fast recovery diode of having connected, the branch road and no current pass through.
8th, within t7~t8 period, positive half cycle current propagation process is realized.
Understand that specific implementation process is as follows with reference to Fig. 2 and Fig. 3：
In t7~t8 periods, V4 shut-offs, V3 are not turned on also, and transformer two ends pressure difference increase, electric current gradually increases, electric current
From+E → V1 → C5 → T1 primary → V8 →+E
Preferably, the FET power amplifier in the above embodiments of the present application can also include：Second electric capacity and
Three electric capacity（C1、C2）, the first end after two electric capacity are connected in parallel is connected to supply voltage, the second end ground connection, for realizing
DC filtering and the function of energy storage.
Preferably, the FET power amplifier in the above embodiments of the present application can also include：First resistor and
Four electric capacity（Can be R1, C3）, after first resistor and the series connection of the 4th electric capacity, one end and the first inductance connection, other end ground connection,
For absorbing the higher-order of oscillation；Second resistance and the 5th electric capacity（Can be R2, C4）, second resistance and the 5th electric capacity series connection after,
One end and the second inductance connection, other end ground connection, for absorbing the higher-order of oscillation.
As shown in Fig. 2 each integrated drive electronics in the above embodiments of the present application can include：Circuit is detected, is used for
The magnitude of voltage in detection integrated drive electronics between DK ports and SK ports, integrated drive electronics is being determined according to magnitude of voltage in real time
In the case of generation over-current phenomenon avoidance, integrated drive electronics output drive signal is blocked；Processor, for recording integrated drive electronics
Block drive signal block number of times, and block number of times exceed predetermined value in the case of, then send completely close off signal so that
Obtain integrated drive electronics and terminate automatic unlocking function.
Specifically, the integrated drive electronics being related in the above embodiments of the present application uses Integrated design, with driving work(
Energy, excessively stream, short circuit, under-voltage protection function, are powered using 15V power supplys, input signal+15V/0V unipolarity square waves, and output signal+
15V/-10V bipolar square waves.And driving output should be generating positive and negative voltage, positive voltage opens MOSFET, negative voltage shut-off pipe.Drive
Dynamic output voltage+12V~+15V/-5V~-15V, to protect sampling obtaining current or voltage to be defined.Work as integrated drive electronics
In detected that excessively stream is short-circuit or under-voltage signal after when blocking output, perform block integrated drive electronics output drive signal
Function, blocking time can be by RC circuit configurations, and it is 100mS for example to design RC blocking times, i.e., integrated after blocking time
Drive circuit performs automatic unlocking function, i.e., integrated drive electronics continues to output signal after blocking time, if detection branch
The normal then lockout circuit of electric current is no longer worked, and continues to block output signal if still abnormal.Said process is full-automatic work
Make, driving plate inner treater can be counted to the number of stoppages, when 3 failures occurs in the corresponding branch road of monolithically integrated drive circuit
When, then pumping signal is completely closed off, block is no longer automatically terminated.Now need by external control signal or artificial by 15V electricity
Source is resetted.
It follows that this application provides a kind of power for the 0~30kW for amplifying very low frequency CW, FSK, MSK, OOK signal
Amplifier, specifically, MOSFET involved in each embodiment shown in the application（V1、V2、V3、V4）Module can make
It is replaced with IGBT, SiC, BJT device.When MOSFET tube voltages are inadequate, it can be used in series；, can be simultaneously when electric current is inadequate
Connection is used；Electric current, voltage it is inadequate when can connection in series-parallel be that series-parallel connection is used；C1 can be thin-film capacitor, alminium electrolytic condenser；C2 can be with
It is ceramic condenser, electric capacity of the dacron, thin-film capacitor；C3, C4 can be mica capacitor, thin-film capacitor, ceramic condenser；C5 can be film
Electric capacity；Diode (led) module（V5、V6、V7、V8、V9、V10）Using the diode with quick recovery characteristics, voltage, electric current
Ability is suitable with MOSFET element.Voltage can be used in series when inadequate, but need to be pressed；Electric current not enough can be used in parallel；R1, R2 can
From noninductive resistance, wire-wound resistor；F1, F2 select fuse for protecting semiconductor, with quick defencive function, voltage, electric current
Ability is suitable with MOSFET voltages, current carrying capability；L1, L2 are air-core inductor, the several microhenrys of inductance.According to inductance coiling
Material is different, it may be considered that whether use skeleton.It is not required here containing iron inductance；Output power transformer T1 is synthesis transformation
Device, carries out impedance matching, transformer magnet ring uses Superfine crystal material, and its core material can be for delivering power and with load
Ferrite, iron based nano crystal（Ultracrystallite）；Input, the output of PA signal use aviation plug, and output cord is adopted
Use Multi-strand excitation；Cooled plate input, output use self-sealing joint.Whole H bridge type circuit uses aluminium alloy plate installed in one
Bending welding is casing with panel combination, and its advantage is with preferable mechanical strength and shielding properties.Casing inner bottom surface spreads copper
Plate is insulated with casing as circuit, is separated with casing shielding circuit.
The application can also provide a kind of FET power amplifying system, and the system includes any one above-mentioned field-effect
The embodiment of tube power amplifier, and FET power amplifying system can also include：Driver, connects with control circuit
Connect, for providing monochromatic simulation signal.
As can be seen from the above description, the present invention realizes following technique effect：The power amplification that the application is provided
Device is main by many high-power FETs, many fast recovery diodes, polylith integrated drive electronics plate, a power output
Transformer is constituted, and the power amplifier, using H bridge type circuit, by phase-shifting full-bridge control, imitates field using many FETs
Should pipe it is different when be switched on or off, and be switched on or off the time by control every power switch pipe, be close to no-voltage,
Zero point stream is switched, and is reduced peak voltage, electric current that switching loss and pipe are born, is improved conversion efficiency, reduces radiating
Device area, finally reduces power amplifier volume.FET integrated drive electronics uses Integration Design, is driven using square wave
It is dynamic, reduce switching loss.Buffer inductance is also taken inside power amplifier, capacitance-resistance device is absorbed and blocks two poles of circulation
The measures such as pipe, adapt it to various input signals, further increase its job stability.Power output uses transformer coupling
Close, magnetic core is ring-type, using Superfine crystal material, with high magnetic strength, high permeability, low-loss and excellent temperature stability, very
Replace conventional manganese-zinc ferrite well.Measure cooling uses water cooling, and power device is cooled down by cooled plate.It is in the past very low
Frequency power amplifier uses forced air cooling, and because current power output is increased, volume-diminished, power density is excessive, forced air cooling
It has been be not suitable for that, water-cooling efficiency high, pyroconductivity is more than 20 times of traditional air cooling way, and the height without wind-cooling heat dissipating is made an uproar
Sound, solves the problems, such as cooling and noise reduction well.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.Within the spirit and principles of the invention, that is made any repaiies
Change, equivalent substitution, improvement etc., should be included in the scope of the protection.
Claims (10)
1. a kind of FET power amplifier, it is characterised in that including：
Circuit is controlled, for monochromatic simulation signal to be converted into data signal, and the data signal is exported；
Four integrated drive electronics, the first port of each integrated drive electronics is connected with the control circuit respectively, the
Two-port netwerk is connected with a fet power switch pipe respectively, is turned for receiving the data signal, and by the data signal
Turn to for controlling each fet power switch pipe ON time or the drive signal of turn-off time, to control the field
Effect power switch pipe is switched on or off when different；
Output power transformer, is connected with fet power switch pipe each described, for being controlled by the drive signal
In the case of leading-bridge or lagging leg conducting, the power after output amplification；
Wherein, the leading-bridge or the lagging leg respectively include two fet power switch pipes.
2. FET power amplifier according to claim 1, it is characterised in that
The G ports of first integrated drive electronics are connected to the grid of the first fet power switch pipe, and first field-effect
The drain electrode of power switch pipe is connected to supply voltage via the first inductance and the first fuse；
The G ports of second integrated drive electronics are connected to the grid of the second fet power switch pipe, and second field-effect
The drain electrode of power switch pipe is connected with the source electrode of first integrated drive electronics, the source of the second fet power switch pipe
Pole is grounded；
The G ports of 4th integrated drive electronics are connected to the grid of the 4th fet power switch pipe, and the 4th field-effect
The drain electrode of power switch pipe is connected to the supply voltage via the second inductance and the second fuse；
The G ports of 3rd integrated drive electronics are connected to the grid of the 3rd fet power switch pipe, and the 3rd field-effect
The drain electrode of power switch pipe is connected with the source electrode of the 4th integrated drive electronics, the source of the 3rd fet power switch pipe
Pole is grounded；
The first end of the primary coil of synthesis transformer is via the first capacitance connection in the second fet power switch pipe
Drain electrode and the first node on the source electrode connecting path of first integrated drive electronics, and the primary line of the synthesis transformer
The drain electrode of source electrode and the 3rd integrated drive electronics that second end of circle is connected to the 4th fet power switch pipe connects
The Section Point connected on road；
Wherein, when the drive signal controls the first fet power switch pipe and the 3rd fet power switch pipe simultaneously
Conducting, and the second fet power switch pipe and the 4th fet power switch pipe are when simultaneously turning off, the power supply
Voltage is applied on the primary coil of the synthesis transformer, and by exporting the amplifying power after magnetic coupling；
Or, when the drive signal controls the second fet power switch pipe and the 4th fet power switch pipe simultaneously
Conducting, and the first fet power switch pipe and the 3rd fet power switch pipe are when simultaneously turning off, the power supply
Voltage is applied on the primary coil of the synthesis transformer, and by exporting the amplifying power after magnetic coupling.
3. FET power amplifier according to claim 2, it is characterised in that the FET power amplifier
Also include：
First diode, the positive pole of first diode is connected to the source electrode of the second fet power switch pipe, described
The negative pole of first diode is connected to the first node, so that the proper drive signal controls first fet power
After switching tube shut-off, and control before the second fet power switch pipe do not turn on, to control the synthesis transformer
Current stream on primary coil.
4. FET power amplifier according to claim 2, it is characterised in that the FET power amplifier
Also include：
Second diode, the positive pole of second diode is connected to the source electrode of the 3rd fet power switch pipe, described
The negative pole of second diode is connected to the Section Point, so that the proper drive signal controls second fet power
After switching tube conducting, and before the 4th fet power switch pipe is not turned on, the primary of the synthesis transformer is controlled
Electric current on coil is returned via second diode.
5. FET power amplifier according to claim 2, it is characterised in that the FET power amplifier
Also include：
3rd diode, the positive pole of the 3rd diode is connected to the first node, and the negative pole of the 3rd diode connects
The supply voltage is connected to, so that after the proper drive signal control the second fet power switch pipe shut-off, and
Before the first fet power switch pipe is not turned on, the current stream on the primary coil of the synthesis transformer is controlled.
6. FET power amplifier according to claim 2, it is characterised in that the FET power amplifier
Also include：
4th diode, the positive pole of the 4th diode is connected to the Section Point, and the negative pole of the 4th diode connects
The supply voltage is connected to, so that after the proper drive signal control the first fet power switch pipe conducting, and
Before the 3rd fet power switch pipe is not turned on, the electric current on the primary coil of the synthesis transformer is controlled via institute
State the return of the 4th diode.
7. FET power amplifier according to claim 2, it is characterised in that the FET power amplifier
Also include：
Second electric capacity and the 3rd electric capacity, the first end after two electric capacity are connected in parallel are connected to the supply voltage, the second end
Ground connection, for DC filtering and energy storage.
8. FET power amplifier according to claim 2, it is characterised in that the FET power amplifier
Also include：
After first resistor and the 4th electric capacity, the first resistor and the series connection of the 4th electric capacity, one end and first inductance connection,
The other end is grounded, for absorbing the higher-order of oscillation；
After second resistance and the 5th electric capacity, the second resistance and the series connection of the 5th electric capacity, one end and second inductance connection,
The other end is grounded, for absorbing the higher-order of oscillation.
9. FET power amplifier according to claim 1, it is characterised in that each integrated drive electronics bag
Include：
Circuit is detected, for detecting the magnitude of voltage in the integrated drive electronics between DK ports and SK ports in real time, in basis
In the case that the magnitude of voltage determines that over-current phenomenon avoidance occurs for the integrated drive electronics, the integrated drive electronics output institute is blocked
State drive signal；
Processor, the block number of times of the drive signal is blocked for recording the integrated drive electronics, and in the block time
In the case that number exceedes predetermined value, then send and completely close off signal to cause the integrated drive electronics to terminate automatic unlocking work(
Energy.
10. a kind of FET power amplifying system, it is characterised in that including the field described in any one in claim 1 to 9
Effect tube power amplifier, the FET power amplifying system also includes：
Driver, is connected with the control circuit, for providing the monochromatic simulation signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210469805.1A CN103825562B (en) | 2012-11-19 | 2012-11-19 | FET power amplifier and system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210469805.1A CN103825562B (en) | 2012-11-19 | 2012-11-19 | FET power amplifier and system |
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| CN103825562A CN103825562A (en) | 2014-05-28 |
| CN103825562B true CN103825562B (en) | 2017-08-25 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106100596A (en) * | 2016-08-17 | 2016-11-09 | 北京北广科技股份有限公司 | A kind of power amplifying system of very low frequency Liquid-cooled Solid-state Transmitter |
| CN109495092B (en) * | 2018-11-19 | 2024-06-04 | 深圳市格瑞普智能电子有限公司 | Power switch tube driving circuit and driving method |
| CN113708451A (en) * | 2021-08-27 | 2021-11-26 | 浪潮商用机器有限公司 | Super capacitor charging circuit |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1489272A (en) * | 2002-10-08 | 2004-04-14 | 中国科学院电工研究所 | Phase-shift full-bridge high-frequency inverter based on DSP |
| CN1949642A (en) * | 2006-11-09 | 2007-04-18 | 北京航空航天大学 | Digital switch power amplifier for magnetic suspension flywheel magnetic bearing system |
| CN201203506Y (en) * | 2008-05-28 | 2009-03-04 | 苏州试验仪器总厂 | Power output circuit of electric oscillating table |
| CN101443998A (en) * | 2006-05-15 | 2009-05-27 | 旭化成电子材料元件株式会社 | Drive device |
| CN100538095C (en) * | 2007-08-24 | 2009-09-09 | 北京航空航天大学 | A kind of switch power amplifier that is used for magnetic bearing system based on space vector technique |
| CN201403075Y (en) * | 2009-03-17 | 2010-02-10 | 中国船舶重工集团公司第七一〇研究所 | Multi-way PWM signal power amplifier |
| CN203086408U (en) * | 2012-11-19 | 2013-07-24 | 北京北广科技股份有限公司 | Field-effect tube power amplifier and system |
-
2012
- 2012-11-19 CN CN201210469805.1A patent/CN103825562B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1489272A (en) * | 2002-10-08 | 2004-04-14 | 中国科学院电工研究所 | Phase-shift full-bridge high-frequency inverter based on DSP |
| CN101443998A (en) * | 2006-05-15 | 2009-05-27 | 旭化成电子材料元件株式会社 | Drive device |
| CN1949642A (en) * | 2006-11-09 | 2007-04-18 | 北京航空航天大学 | Digital switch power amplifier for magnetic suspension flywheel magnetic bearing system |
| CN100538095C (en) * | 2007-08-24 | 2009-09-09 | 北京航空航天大学 | A kind of switch power amplifier that is used for magnetic bearing system based on space vector technique |
| CN201203506Y (en) * | 2008-05-28 | 2009-03-04 | 苏州试验仪器总厂 | Power output circuit of electric oscillating table |
| CN201403075Y (en) * | 2009-03-17 | 2010-02-10 | 中国船舶重工集团公司第七一〇研究所 | Multi-way PWM signal power amplifier |
| CN203086408U (en) * | 2012-11-19 | 2013-07-24 | 北京北广科技股份有限公司 | Field-effect tube power amplifier and system |
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|---|---|
| CN103825562A (en) | 2014-05-28 |
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