CN208158439U - A kind of pulse frequency modulated convertor circuit - Google Patents
A kind of pulse frequency modulated convertor circuit Download PDFInfo
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- CN208158439U CN208158439U CN201820799083.9U CN201820799083U CN208158439U CN 208158439 U CN208158439 U CN 208158439U CN 201820799083 U CN201820799083 U CN 201820799083U CN 208158439 U CN208158439 U CN 208158439U
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- effect tube
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Abstract
The utility model is pulse frequency modulated convertor circuit, and power supply E anode connects field-effect tube K1 and K3 drain electrode；K1 source electrode connects diode VD1 anode；VD1 cathode and diode VD2 anode are terminated on capacitor C1；Diode VD3 cathode connects diode VD4 anode and the lower end C1；Field-effect tube K2 drain electrode connects VD2 cathode；VD4 cathode connects field-effect tube K4 drain electrode；K3 source electrode connects VD3 anode；K2 and K4 source electrode connects diode VD cathode and the left end inductance L；L right end connects transformer T primary side upper end；VD anode and E cathode are terminated under T primary side；K1-K4 grid connects driving signal；The output of T pair side connects rectifier bridge exchange side；Cathode rectifier exports the upper end termination capacitor C2-C3, triode V1 and V3 collector；V1 emitter connects triode V2 collector, the upper end capacitor C4 and the load upper end RL；V3 emitter connects the lower end C4, triode V4 collector and the lower end RL；V4 and V2 emitter connects the lower end C2-C3 and rectifier bridge negative polarity output；V1-V4 base stage connects control signal.
Description
Technical field
It is standard sine the utility model relates to a kind of pulse frequency modulated convertor circuit and method, especially output waveform
Wave；Output power is adjustable in required frequency band and load impedance a certain range, sine wave freuqency is adjustable, and waveform distortion
It is lower.
Background technique
In the prior art, traditional PWM technology is worked using voltage chopping mode, the powerful output waveform of centering and
Speech is difficult to filter off higher hamonic wave by the way of passive filtering, and voltage chopping mode circuit efficiency is low, and controlling is poor, and to function
Rate switching tube lacks protection, and therefore, it is good to develop a kind of controlling, and power switch tube works in Sofe Switch state, and output power can
The technology of tune, just becoming must solve the problems, such as.
Summary of the invention
The purpose of this utility model is sought in view of the above-mentioned problems, proposing a kind of pulse frequency modulated convertor circuit and corresponding
Method, make circuit main switching device work in Sofe Switch state, digital signal directly controls, do not damage main power device, electricity
Road is high-efficient, and Shape fidelity is high, to solve problem of the prior art.
The utility model proposes this pulse frequency modulated convertor circuit, by resistance, capacitor, diode, triode, field
Effect pipe and transformer composition, it is characterised in that power supply E anode, field-effect tube K1 drain electrode are connected with field-effect tube K3 drain electrode；?
Effect pipe K1 source electrode is connected with diode VD1 anode；The upper end storage capacitor C1, diode VD1 cathode and diode VD2 anode phase
Even；Diode VD3 cathode, diode VD4 anode are connected with the lower end storage capacitor C1；Field-effect tube K2 drain electrode and diode VD2
Cathode is connected；Diode VD4 cathode connects field-effect tube K4 drain electrode；Field-effect tube K3 source electrode connects diode VD3 anode；Field-effect tube
K2 source electrode, field-effect tube K4 source electrode, the diode VD cathode peace wave left end inductance L are connected；Flat wave inductance L right end meets transformer T
Primary side upper end；Transformer T primary side lower end, diode VD anode are grounded after being connected with power supply E cathode；Field-effect tube K1-K4 grid
It is connected with corresponding driving signal G1-G4；Transformer secondary output connects rectifier bridge exchange side；Cathode rectifier output end, filter
The upper end wave capacitor C2, the upper end filter capacitor C3, triode V1 collector are connected with triode V3 collector；Triode V1 transmitting
Pole, triode V2 collector, the upper end filter capacitor C4 are connected with the load upper end RL；Under triode V3 emitter, filter capacitor C4
End, triode V4 collector are connected with the load lower end RL；Under triode V4 emitter, triode V2 emitter, filter capacitor C2
End, the lower end filter capacitor C3 are connected ground connection with rectifier bridge negative polarity output；Triode V1-V4 base stage and corresponding control signal
G5-G8 is connected.
In the circuit, it is high speed field-effect tube, triode V1- that field-effect tube K1-K4, which is main circuit power switching tube,
V4 is characterized the higher triode of frequency.
Triode V1-V4 constitutes inversion（Paraphase）Circuit.
The course of work of the utility model can separately be described as：Using Large-power High-Speed field-effect tube, building system master is returned
Road is controlled using DSP, constructs control circuit, and digital signal directly controls power main switching device and inversion（Paraphase）Circuit, specific mistake
Cheng Wei：
The number that power switch tube by controlling major loop turns on and off, obtains the bearing power of fixed value, is exporting
End exports different performance number, changes supply voltage E and storage capacitor C1 capacitance, any in major loop copped wave bridge chopping frequency value
The adjustable load gained watt level of one value；Fixed storage capacitor value C1 and supply voltage E therein, changes chopping frequency
Value, the output power that acquisition changes related different value with driving signal frequency accordingly pass through within a pulse period
The pulse number in the process control pulse period is controlled, each pulse allows the power switch tube in major loop to turn off and open one
Secondary, on-off obtains the fixed power of a numerical value each time, and when power switch tube is opened, major loop stores energy, and when shutdown releases
Exoergic amount obtains corresponding load energy, and the difference of pulse number changes the on-off frequency of switching tube in the pulse period
Become, so that load be allowed to obtain required power, generate pwm pulse driving signal with DSP, power switch tube is allowed to be connected or turn off,
Make chopping frequency that sinusoidal rule be presented, after the energy energy storage superposition of sinusoidal rule, inverter bridge alternate conduction is transferred to load, from
And in load synthesis sine.
This circuit of the utility model compared with traditional PWM convertor circuit there are all main switching devices to work
In Sofe Switch state and the advantages that can be directly controlled completely using digital signal, power circuit output short-circuit does not damage main power
Device, circuit it is high-efficient.Output waveform is standard sine wave；The output power within the scope of required frequency band and load impedance
It is adjustable, and waveform distortion is low.
Detailed description of the invention
Fig. 1 is the utility model circuit diagram.
Specific embodiment
The implementation process and beneficial effect of the utility model are further illustrated with reference to the accompanying drawing.
The parameters such as field-effect tube, triode, diode specification, size of capacitor, resistance in the circuit of the utility model
Calculating is identical with the prior art, belongs to mature technology therefore is no longer discussed.
As shown in Figure 1, field-effect tube K1, K2, K3, K4 are main circuit power switching tube, capacitor C1 is major loop energy storage electricity
Hold, inductance L is flat wave inductance, and capacitor C2, C3, C4 are filter capacitor, and triode V1, V2, V3, V4 constitute inversion（Paraphase）Electricity
Road.Specific embodiment is as follows：
The anode of power supply E, the drain electrode of field-effect tube K1, the drain electrode of field-effect tube K3 are connected.The source electrode two of field-effect tube K1
The anode of pole pipe VD1 is connected.The upper end of storage capacitor C1, the cathode of diode VD1, the anode of diode VD2 are connected.Diode
The cathode of VD3, the anode of diode VD4, the lower end of storage capacitor C1 are connected.The drain electrode of field-effect tube K2, diode VD2 yin
Extremely it is connected.The drain electrode of the cathode, field-effect tube K4 of diode VD4 is connected.The anode phase of the source diode VD3 of field-effect tube K3
Even.The source electrode of field-effect tube K2, the source electrode of field-effect tube K4, the cathode of diode VD, the left end of flat wave inductance L are connected.Flat wave
The right end of inductance L, the upper end of transformer T primary side are connected.The lower end of transformer T primary side, the anode of diode VD, power supply E it is negative
It is grounded after being extremely connected.The grid of field-effect tube K1, K2, K3, K4 are connected with corresponding driving signal G1, G2, G3, G4.Transformer
The output of secondary side connects rectifier bridge exchange side, cathode rectifier output end, the upper end of filter capacitor C2, filter capacitor C3 upper end,
The collector of triode V1, the collector of triode V3 are connected.The emitter of triode V1, the collector of triode V2, filtering
The upper end of capacitor C4, the upper end for loading RL are connected.The emitter of triode V3, the lower end of filter capacitor C4, triode V4 collection
Electrode, the lower end for loading RL are connected.The emitter of triode V4, the emitter of triode V2, the lower end of filter capacitor C2, filtering
The lower end of capacitor C3, rectifier bridge negative polarity output, which are connected, to be grounded.The base stage of triode V1, V2, V3, V4 are believed with corresponding control
Number G5, G6, G7, G8 are connected.
Actual measurement shows：The utility model uses rated current 2A, and resistance value is adjustable（0 ~ 100 Europe）High-power slide rheostat
As load, load obtains standard sine wave, adjusts the pulse period（Driving frequency）The difference of interior pulse number makes switching tube
On-off frequency change, i.e., chopping frequency changes, so that the power for allowing load to obtain is adjustable in a certain range, sine wave
It is adjustable in frequency a certain range.
Claims (3)
1. a kind of pulse frequency modulated convertor circuit, by resistance, capacitor, diode, triode, field-effect tube and transformer group
At, it is characterised in that power supply E anode, field-effect tube K1 drain electrode are connected with field-effect tube K3 drain electrode；Field-effect tube K1 source electrode and two
Pole pipe VD1 anode is connected；The upper end storage capacitor C1, diode VD1 cathode are connected with diode VD2 anode；Diode VD3 yin
Pole, diode VD4 anode are connected with the lower end storage capacitor C1；Field-effect tube K2 drain electrode is connected with diode VD2 cathode；Diode
VD4 cathode connects field-effect tube K4 drain electrode；Field-effect tube K3 source electrode connects diode VD3 anode；Field-effect tube K2 source electrode, field-effect tube
K4 source electrode, the diode VD cathode peace wave left end inductance L are connected；Flat wave inductance L right end connects transformer T primary side upper end；Transformer T
Primary side lower end, diode VD anode are grounded after being connected with power supply E cathode；Field-effect tube K1-K4 grid and corresponding driving signal
G1-G4 is connected；Transformer secondary output connects rectifier bridge exchange side；Cathode rectifier output end, the upper end filter capacitor C2, filtering
The upper end capacitor C3, triode V1 collector are connected with triode V3 collector；Triode V1 emitter, triode V2 collector,
The upper end filter capacitor C4 is connected with the load upper end RL；Triode V3 emitter, the lower end filter capacitor C4, triode V4 collector and
The lower end RL is loaded to be connected；Triode V4 emitter, triode V2 emitter, the lower end filter capacitor C2, the lower end filter capacitor C3 and
Rectifier bridge negative polarity output, which is connected, to be grounded；Triode V1-V4 base stage is connected with corresponding control signal G5-G8.
2. pulse frequency modulated convertor circuit according to claim 1, it is characterised in that the field-effect tube K1-K4 in circuit is
Main circuit switching power pipe, is high speed field-effect tube, and triode V1-V4 is characterized frequency triode.
3. pulse frequency modulated convertor circuit according to claim 1, it is characterised in that triode V1-V4 constitutes inversion paraphase
Circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820799083.9U CN208158439U (en) | 2018-05-28 | 2018-05-28 | A kind of pulse frequency modulated convertor circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820799083.9U CN208158439U (en) | 2018-05-28 | 2018-05-28 | A kind of pulse frequency modulated convertor circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208158439U true CN208158439U (en) | 2018-11-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820799083.9U Expired - Fee Related CN208158439U (en) | 2018-05-28 | 2018-05-28 | A kind of pulse frequency modulated convertor circuit |
Country Status (1)
| Country | Link |
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| CN (1) | CN208158439U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108683354A (en) * | 2018-05-28 | 2018-10-19 | 红河学院 | A kind of pulse frequency modulated convertor circuit |
-
2018
- 2018-05-28 CN CN201820799083.9U patent/CN208158439U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108683354A (en) * | 2018-05-28 | 2018-10-19 | 红河学院 | A kind of pulse frequency modulated convertor circuit |
| CN108683354B (en) * | 2018-05-28 | 2024-02-02 | 红河学院 | Pulse frequency modulation converter circuit |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181127 Termination date: 20190528 |