CN208723632U - A kind of start-oscillation circuit of self-excitation inductively power transmission system - Google Patents
A kind of start-oscillation circuit of self-excitation inductively power transmission system Download PDFInfo
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- CN208723632U CN208723632U CN201821678125.XU CN201821678125U CN208723632U CN 208723632 U CN208723632 U CN 208723632U CN 201821678125 U CN201821678125 U CN 201821678125U CN 208723632 U CN208723632 U CN 208723632U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The utility model discloses a kind of start-oscillation circuits of self-excitation inductively power transmission system, inductively power transmission system includes inverter and resonant network for self-excitation, and the start-oscillation circuit of self-excitation inductively power transmission system includes drive control circuit and start-oscillation circuit；Resonant network includes capacitor C2 and coupling transformer inductance L4 in parallel, and drive control circuit includes comparator U1, comparator U2, power drives chip TPS2812, diode D1 and diode D2；Start-oscillation circuit includes switch mosfet pipe Q3, resistance R6, resistance 12, resistance 15, thyristor Q4, diode D3, diode D4, diode D5, diode D6 and diode D7.The utility model circuit structure is simple, and rationally, it is convenient and at low cost to realize for design, can quickly and efficiently realize the starting of oscillation of self-excitation inductively power transmission system, practical, applied widely, has good application value.
Description
Technical field
The utility model belongs to self-excitation inductively power transmission system control technology field, and in particular to a kind of from excitation
Answer the start-oscillation circuit of coupled power transmission system.
Background technique
In recent years, energy big data technology, distributed collaboration control, DC grid, electric vehicle engineering, electricity storage technology,
The fast development of the technologies such as device for high-power power electronic indicates the rise of energy Net-volution.Wireless power transmission
(WPT) the important composition technology as energy internet, equipment oriented energy transmission link solve the mill of traditional wire transmission of electricity
The various problems such as damage, electric leakage, spark discharge enhance equipment to the adaptability of complex working condition.
In engineer application, inductively coupled power transfer inductively coupled power transfer (Inductive Coupled Power
Transfer, ICPT) coupling distance of system, the former parameters such as secondary coil angle and central degree, load change frequent occurrence.Especially
, when the primary side of ICPT system uses shunt compensation or some combined compensations, selected Parameters variation can make primary side resonant network solid for it
There are frequency shifts, to keep working frequency and resonance intrinsic frequency inconsistent, causes under loosely coupled transformer efficiency of transmission
Drop, thus, resonance frequency tracking has the adaptability of complex working condition for improving the efficiency of ICPT system, improving ICPT system
It is significant.Currently, generalling use software algorithm or phase-locked loop chip is hard for the tracking of ICPT control system resonance frequency
Part mode is realized.First method software algorithm obtains height by acquiring resonant network frequency signal after comparator is handled
Then low level signal realizes that phase relation is adjusted with algorithm on the microprocessor, finally obtains the drive equal with resonance frequency
Dynamic signal.The method programming is more complicated, and resonance frequency tracks process duration.Second method uses hardware lock
Xiang Huan, detects the current signal of resonant tank by current transformer first, and current signal is converted to voltage signal, voltage signal
Using obtaining voltage V after differential amplificationP, then to VPPhase compensation is carried out, and compared with reference voltage, obtained and resonance frequency
The consistent pulse voltage signal of rate, is finally input to phaselocked loop for pulse signal, and phaselocked loop exports one and VCFrequency is identical
Pulse to pwm driver control main circuit switching tube on-off.Hardware phase-locked-loop complex circuit designs, when the frequency of phaselocked loop
When rate is higher, system is affected by temperature larger.
Utility model content
The technical problem to be solved by the utility model is in view of the deficiency of the prior art, provide a kind of self-excitation
The inductively start-oscillation circuit of power transmission system, circuit structure is simple, and rationally, it is convenient and at low cost to realize for design, can
Quickly and efficiently realize the starting of oscillation of self-excitation inductively power transmission system, it is practical, it is applied widely, have good
Application value.
In order to solve the above technical problems, the technical solution adopted in the utility model is: inductively power passes for a kind of self-excitation
The start-oscillation circuit of defeated system, inductively power transmission system includes inverter and resonant network, feature for the self-excitation
Be: the start-oscillation circuit of the self-excitation inductively power transmission system includes drive control circuit and start-oscillation circuit；It is described inverse
Becoming converter includes switch mosfet pipe Q1, switch mosfet pipe Q2, inductance L1, inductance L2, inductance L3, resistance R2 and resistance
One end after R5, the inductance L2 and inductance L3 series connection is connect with the drain electrode of switch mosfet pipe Q1, the inductance L2 and inductance
The other end after L3 series connection is connect with the drain electrode of switch mosfet pipe Q2, and one end of the inductance L1 is with inductance L2's and inductance L3
Connecting pin connection, the other end of the inductance L1 are the input terminal Vi of inverter, and the resistance R5 connects in switch mosfet
Between the grid and source electrode of pipe Q1, the resistance R2 is connect between the grid and source electrode of switch mosfet pipe Q2；The Resonance Neural Network
Network includes one end after capacitor C2 and coupling transformer inductance L4, the capacitor C2 and coupling transformer inductance L4 in parallel are in parallel
Connect with the drain electrode of switch mosfet pipe Q1, the capacitor C2 and coupling transformer inductance L4 it is in parallel after the other end and MOSFET
The drain electrode of switching tube Q2 connects；
The drive control circuit include comparator U1, comparator U2, power drives chip TPS2812, diode D1 and
Diode D2 and resistance R3, resistance R4, resistance R7, resistance R8, resistance R9, resistance R10, resistance R11, resistance R13, resistance
R14, resistance R16, resistance R17, resistance R18, resistance R19 and resistance R20；One end of the resistance R9 and switch mosfet pipe Q2
Drain electrode connection, one end of the resistance R14 connect with the drain electrode of switch mosfet pipe Q1, and the other end of the resistance R9 passes through
Resistance R8 ground connection, the other end of the resistance R14 is grounded by resistance R16, the anode of the diode D1 and diode D2's
Cathode is connect with the connecting pin of resistance R9 and resistance R8, and the anode of the cathode of the diode D1 and diode D2 are and resistance
R14 is connected with the connecting pin of resistance R16, and one end of the resistance R10 and one end of resistance R18 are with resistance R8's and resistance R9
Connecting pin connection, one end of the resistance R13 and one end of resistance R17 are connect with the connecting pin of resistance R14 and resistance R16,
The inverting input terminal of the comparator U1 is connect with the other end of resistance R10, the non-inverting input terminal and resistance of the comparator U1
The other end of R13 connects, and the inverting input terminal of the comparator U2 is connect with the other end of resistance R17, the comparator U2's
Non-inverting input terminal is connect with the other end of resistance R18, the resistance R7 connect comparator U1 negative voltage power VEE and reverse phase it is defeated
Enter between end, the resistance R20 connects between the negative voltage power supply VEE and inverting input terminal of comparator U2, and the resistance 11 connects
Power between VCC and output end in the positive voltage of comparator U1, the resistance 19 connect comparator U2 positive voltage power supply VCC and
Between output end, the 2nd pin of the power drives chip TPS2812 is connect with comparator U2 output end, the power drives
The 3rd pin of chip TPS2812 is grounded, and the 4th pin and comparator U1 output end of the power drives chip TPS2812 connects
It connects, the 7th pin of the power drives chip TPS2812 is connect by resistance R3 with the grid of switch mosfet pipe Q1, described
The 5th pin of power drives chip TPS2812 is connect by resistance R4 with the grid of switch mosfet pipe Q2；
The start-oscillation circuit includes switch mosfet pipe Q3, resistance R6, resistance 12, resistance 15, thyristor Q4, diode
D3, diode D4, diode D5, diode D6 and diode D7, the drain electrode of the switch mosfet pipe Q3 and switch mosfet
The drain electrode of pipe Q1 connects, and the source electrode of the switch mosfet pipe Q3 is grounded by resistance R15, the grid of the switch mosfet pipe Q3
Pole is connect with the cathode of diode D7, and the anode of the diode D7 passes through the output end VCC connection of resistance R6 and external power supply,
The resistance R12 connects between the grid and source electrode of switch mosfet pipe Q3, and the anode of the thyristor Q4 is with diode D7's
Anode connection, the gate pole of the minus earth of the thyristor Q4, the thyristor Q4 are connect with the source electrode of switch mosfet pipe Q3,
Anode after the diode D3 and diode D4 series connection is connect with the anode of thyristor Q4, the diode D3 and diode D4
Cathode after series connection is connect with the inverting input terminal of comparator U2, anode after the diode D5 and diode D6 series connection and brilliant
The inverting input terminal of cathode and comparator U1 after the anode connection of brake tube Q4, the diode D5 and diode D6 series connection connects
It connects.
The start-oscillation circuit of above-mentioned a kind of self-excitation inductively power transmission system, it is characterised in that: the MOSFET is opened
The model for closing pipe Q1, switch mosfet pipe Q2 and switch mosfet pipe Q3 is IRF640.
A kind of start-oscillation circuit of above-mentioned self-excitation inductively power transmission system, it is characterised in that: the thyristor Q4
Model MCR100-6.
A kind of start-oscillation circuit of above-mentioned self-excitation inductively power transmission system, it is characterised in that: the comparator U1
With two comparators that comparator U2 is respectively inside comparator chip LM319.
A kind of start-oscillation circuit of above-mentioned self-excitation inductively power transmission system, it is characterised in that: the diode D1,
Diode D2, diode D3, diode D4, diode D5, diode D6 and diode D7 model be 1N4148.
The utility model patent has the advantage that compared with prior art
1, the circuit structure of the utility model is simple, and rationally, it is convenient and at low cost to realize for design.
2, compared with prior art, the utility model is not only not necessarily to be programmed design, but also without carrying out complicated circuit ginseng
Number selection design, can be reliably achieved the starting of oscillation of self-excitation inductively power transmission system.
3, the utility model is by start-oscillation circuit, adjustable resonant network energy storage size, and start-oscillation circuit is to main circuit
Any interference is not constituted, and the driving signal of readily available more accurate switching tube improves the efficiency of energy transmission, the scope of application
Extensively.
4, the utility model select instrument comparator LM319, response speed is very fast, be able to detect that microsecond rank with
On voltage change situation, real-time detection effect is obvious.
5, the utility model can be suitable for various self-excited drivings control potential circuit in, can be realized resonance frequency with
Track exports the PWM drive signal of two-way complementation, applied widely, practical, has good application value.
In conclusion the utility model circuit structure is simple, rationally, it is convenient and at low cost to realize for design, can quickly, have
The starting of oscillation of self-excitation inductively power transmission system is realized on effect ground, practical, applied widely, has good popularization and application
Value.
Below by drawings and examples, the technical solution of the utility model is described in further detail.
Detailed description of the invention
Fig. 1 is the circuit diagram of the utility model.
Description of symbols:
1-drive control circuit；2-inverters；3-resonant networks；
4-start-oscillation circuits.
Specific embodiment
As shown in Figure 1, the start-oscillation circuit of the self-excitation of the utility model inductively power transmission system, the self-excitation induction
Coupled power transmission system includes inverter 2 and resonant network 3, the starting of oscillation of the self-excitation inductively power transmission system
Circuit includes drive control circuit 1 and start-oscillation circuit 4；The inverter 2 includes switch mosfet pipe Q1, switch mosfet
Pipe Q2, inductance L1, inductance L2, inductance L3, resistance R2 and resistance R5, the inductance L2 and inductance L3 series connection after one end with
The leakage of the other end and switch mosfet pipe Q2 after the drain electrode connection of switch mosfet pipe Q1, the inductance L2 and inductance L3 series connection
Pole connection, one end of the inductance L1 are connect with the connecting pin of inductance L2 and inductance L3, and the other end of the inductance L1 is inversion
The input terminal Vi of converter 2, the resistance R5 connect between the grid and source electrode of switch mosfet pipe Q1, and the resistance R2 connects
Between the grid and source electrode of switch mosfet pipe Q2；The resonant network 3 includes capacitor C2 and coupling transformer inductance in parallel
One end after L4, the capacitor C2 and coupling transformer inductance L4 are in parallel is connect with the drain electrode of switch mosfet pipe Q1, the electricity
The other end after holding C2 and the L4 parallel connection of coupling transformer inductance is connect with the drain electrode of switch mosfet pipe Q2；
The drive control circuit 1 include comparator U1, comparator U2, power drives chip TPS2812, diode D1 and
Diode D2 and resistance R3, resistance R4, resistance R7, resistance R8, resistance R9, resistance R10, resistance R11, resistance R13, resistance
R14, resistance R16, resistance R17, resistance R18, resistance R19 and resistance R20；One end of the resistance R9 and switch mosfet pipe Q2
Drain electrode connection, one end of the resistance R14 connect with the drain electrode of switch mosfet pipe Q1, and the other end of the resistance R9 passes through
Resistance R8 ground connection, the other end of the resistance R14 is grounded by resistance R16, the anode of the diode D1 and diode D2's
Cathode is connect with the connecting pin of resistance R9 and resistance R8, and the anode of the cathode of the diode D1 and diode D2 are and resistance
R14 is connected with the connecting pin of resistance R16, and one end of the resistance R10 and one end of resistance R18 are with resistance R8's and resistance R9
Connecting pin connection, one end of the resistance R13 and one end of resistance R17 are connect with the connecting pin of resistance R14 and resistance R16,
The inverting input terminal of the comparator U1 is connect with the other end of resistance R10, the non-inverting input terminal and resistance of the comparator U1
The other end of R13 connects, and the inverting input terminal of the comparator U2 is connect with the other end of resistance R17, the comparator U2's
Non-inverting input terminal is connect with the other end of resistance R18, the resistance R7 connect comparator U1 negative voltage power VEE and reverse phase it is defeated
Enter between end, the resistance R20 connects between the negative voltage power supply VEE and inverting input terminal of comparator U2, and the resistance 11 connects
Power between VCC and output end in the positive voltage of comparator U1, the resistance 19 connect comparator U2 positive voltage power supply VCC and
Between output end, the 2nd pin of the power drives chip TPS2812 is connect with comparator U2 output end, the power drives
The 3rd pin of chip TPS2812 is grounded, and the 4th pin and comparator U1 output end of the power drives chip TPS2812 connects
It connects, the 7th pin of the power drives chip TPS2812 is connect by resistance R3 with the grid of switch mosfet pipe Q1, described
The 5th pin of power drives chip TPS2812 is connect by resistance R4 with the grid of switch mosfet pipe Q2；
The start-oscillation circuit 4 includes switch mosfet pipe Q3, resistance R6, resistance 12, resistance 15, thyristor Q4, diode
D3, diode D4, diode D5, diode D6 and diode D7, the drain electrode of the switch mosfet pipe Q3 and switch mosfet
The drain electrode of pipe Q1 connects, and the source electrode of the switch mosfet pipe Q3 is grounded by resistance R15, the grid of the switch mosfet pipe Q3
Pole is connect with the cathode of diode D7, and the anode of the diode D7 passes through the output end VCC connection of resistance R6 and external power supply,
The resistance R12 connects between the grid and source electrode of switch mosfet pipe Q3, and the anode of the thyristor Q4 is with diode D7's
Anode connection, the gate pole of the minus earth of the thyristor Q4, the thyristor Q4 are connect with the source electrode of switch mosfet pipe Q3,
Anode after the diode D3 and diode D4 series connection is connect with the anode of thyristor Q4, the diode D3 and diode D4
Cathode after series connection is connect with the inverting input terminal of comparator U2, anode after the diode D5 and diode D6 series connection and brilliant
The inverting input terminal of cathode and comparator U1 after the anode connection of brake tube Q4, the diode D5 and diode D6 series connection connects
It connects.
When it is implemented, diode D3, diode D4, diode D5, diode D6, there are two effect, first effect is
When system is just initially powered up, start-oscillation circuit 4 is started to work, and diode provides access for VCC, is added in high level by diode
The backward end of comparator, so that driving signal exports low level, so that inverter is in an off state, second effect is
After start-oscillation circuit 4 turns off, since the clamped voltage of thyristor Q4 is in 0.8V or so, start-oscillation circuit is thoroughly cut off in order to prevent
The influence of 4 pairs of driving circuits, using two Diode series.
In the present embodiment, the model of the switch mosfet pipe Q1, switch mosfet pipe Q2 and switch mosfet pipe Q3 are equal
For IRF640.
In the present embodiment, the model MCR100-6 of the thyristor Q4.
In the present embodiment, the comparator U1 and comparator U2 are respectively two comparisons inside comparator chip LM319
Device.
When it is implemented, VCC voltage value is 12V, VEE voltage value is -12V.
In the present embodiment, the diode D1, diode D2, diode D3, diode D4, diode D5, diode D6
Model with diode D7 is 1N4148.
The design method of the self-excitation of the utility model inductively start-oscillation circuit of power transmission system, including following step
It is rapid:
Step 1: the capacitor C2 and coupling transformer inductance L4 of selection 3 parameter of appropriate resonant circuit, detailed process are as follows:
Step 101, the capacitance that capacitor C2 is chosen according to 9nF≤C2≤100nF；
In the present embodiment, the capacitance for choosing capacitor C2 is 22nF；
Step 102, according to formulaCalculate inductance LP, and the inductance for choosing coupling coil is LP
Coupling transformer inductance as coupling transformer inductance L4；Wherein, foFor the working frequency of resonance circuit 3；
In the present embodiment, foValue be 100kHz, according to formulaL is calculatedP=
115.14uH；Therefore, the coupling transformer inductance that the inductance for choosing coupling coil is 115.14uH is as coupling transformer electricity
Feel L4；
Step 2: select the switch mosfet pipe Q1 of suitable 2 parameter of inverter, switch mosfet pipe Q2, inductance L1,
Inductance L2, inductance L3, resistance R2 and resistance R5, detailed process are as follows:
Step 201, the model for choosing switch mosfet pipe Q1 and switch mosfet pipe Q2 are IRF640；
Step 202, the inductance value that inductance L1 is chosen according to 1mH≤L1≤15mH；
In the present embodiment, the inductance value for choosing inductance L1 is 2.3mH；
Step 203, the inductance value that inductance L2 is chosen according to 1mH≤L2≤10mH；
In the present embodiment, the inductance value for choosing inductance L2 is 1.3mH；
Step 204, the inductance value that inductance L3 is chosen according to 1mH≤L3≤10mH；
In the present embodiment, the inductance value for choosing inductance L3 is 1.3mH；
Step 205, the resistance value that resistance R2 is chosen according to 5k Ω≤R2≤20k Ω；
In the present embodiment, the resistance value for choosing resistance R2 is 10k Ω；
Step 206, the resistance value that resistance R5 is chosen according to 5k Ω≤R5≤20k Ω；
In the present embodiment, the resistance value for choosing resistance R5 is 10k Ω；
Step 3: comparator U1, comparator U2, the power drives chip of selection 1 parameter of appropriate drive control circuit
TPS2812, diode D1 and diode D2 and resistance R3, resistance R4, resistance R7, resistance R8, resistance R9, resistance R10, electricity
Hinder R11, resistance R13, resistance R14, resistance R16, resistance R17, resistance R18, resistance R19 and resistance R20；And select suitable starting of oscillation
Switch mosfet pipe Q3, resistance R6, resistance 12, resistance 15, thyristor Q4, diode D3, the diode D4, diode of circuit 4
D5, diode D6 and diode D7；Detailed process are as follows:
Two comparators inside step 301, selection comparator chip LM319 are respectively as comparator U1 and comparator
U2；
Step 302 chooses diode D1, diode D2, diode D3, diode D4, diode D5, diode D6 and two
The model of pole pipe D7 is 1N4148；
Step 303, the model for choosing switch mosfet pipe Q3 are IRF640；
Step 304, the model MCR100-6 for choosing thyristor Q4；
Step 305, the resistance value that resistance R8 is chosen according to 10k Ω < R8 < 50k Ω；
In the present embodiment, the resistance value for choosing resistance R8 is 30k Ω；
Step 306, according to formulaChoose resistance R9, resistance R14 and resistance
The resistance value of R16；Wherein, VaFor the voltage of one end of the drain electrode connection of resonance circuit 3 and switch mosfet pipe Q2, VbFor resonance electricity
The voltage of one end of the drain electrode connection of road 3 and switch mosfet pipe Q1；
In the present embodiment, the resistance value for choosing resistance R9 is 27k Ω, and the resistance value of resistance R14 is 27k Ω, the resistance value of resistance R16
For 30k Ω；
Step 307, the resistance value that resistance R10 is chosen according to 500 Ω≤R10≤5k Ω；
In the present embodiment, the resistance value for choosing resistance R10 is 1k Ω；
Step 308, the resistance value that resistance R17 is chosen according to R17=R10；
In the present embodiment, the resistance value for choosing resistance R17 is 1k Ω；
Step 309, basisChoose the resistance value of resistance R6；Wherein, ISCRTo be flowed when thyristor Q4 conducting
Electric current through resistance R10, IholdFor the maintenance electric current of thyristor Q4；
In the present embodiment, the resistance value for choosing resistance R6 is 360 Ω；
Step 3010, according to formulaChoose resistance R16's
Resistance value；Wherein, USCRFor the anode voltage of thyristor Q4, USTFor the starting voltage of switch mosfet pipe Q3, UDFor diode D7's
Pressure drop；
In the present embodiment, UD=0.4V, R6=360 Ω, R8=30k Ω, R10=1k Ω；According to formulaR16=30k Ω is calculated, the resistance value for choosing resistance R16 is
30kΩ；
Step 3011, the resistance value that resistance R11 is chosen according to 5k Ω≤R11≤50k Ω；
In the present embodiment, the resistance value for choosing resistance R11 is 5.1k Ω；
Step 3112, the resistance value that resistance R19 is chosen according to R19=R11；
In the present embodiment, the resistance value for choosing resistance R19 is 5.1k Ω；
Step 3013, the resistance value that resistance R3 is chosen according to the Ω of 5 Ω≤R3≤50；
In the present embodiment, the resistance value for choosing resistance R3 is 10 Ω；
Step 3014, the resistance value that resistance R4 is chosen according to R4=R3；
In the present embodiment, the resistance value for choosing resistance R4 is 10 Ω；
Step 3015, the resistance value that resistance R13 is chosen according to 500 Ω≤R13≤1.5k Ω；
In the present embodiment, the resistance value for choosing resistance R13 is 1k Ω；
Step 3016, the resistance value that resistance R18 is chosen according to R18=R13；
In the present embodiment, the resistance value for choosing resistance R18 is 1k Ω；
Step 3017, the resistance value that resistance R7 is chosen according to 50k Ω≤R7≤150k Ω；
In the present embodiment, the resistance value for choosing resistance R7 is 100k Ω；
Step 3018, the resistance value that resistance R20 is chosen according to R20=R7；
In the present embodiment, the resistance value for choosing resistance R20 is 100k Ω；
Step 3019, the resistance value that resistance R15 is chosen according to the Ω of 0.1 Ω≤R15≤2；
In the present embodiment, the resistance value for choosing resistance R15 is 0.82 Ω；
Step 3010, the resistance value that resistance R12 is chosen according to 5k Ω≤R12≤20k Ω；
In the present embodiment, the resistance value for choosing resistance R12 is 10k Ω；
Step 4: connection switch mosfet pipe Q1, switch mosfet pipe Q2, inductance L1, inductance L2, inductance L3, resistance R2
With resistance R5, inverter 2 is constituted；Detailed process are as follows:
Step 401 connects inductance L2 and inductance L3；
One end after inductance L2 and inductance L3 series connection is connect by step 402 with the drain electrode of switch mosfet pipe Q1, by inductance
The other end after L2 and inductance L3 series connection is connect with the drain electrode of switch mosfet pipe Q2；
One end of inductance L1 is connect by step 403 with the connecting pin of inductance L2 and inductance L3, and the other end of inductance L1 is used
Conducting wire draws the input terminal Vi as inverter 2；
Step 404 connects resistance R5 between the grid and source electrode of switch mosfet pipe Q1,
Step 405 connects resistance R2 between the grid and source electrode of switch mosfet pipe Q2；
Step 5: connection capacitor C2 and coupling transformer inductance L4, constitutes resonant network 3；Detailed process are as follows:
It is step 501, capacitor C2 and coupling transformer inductance L4 is in parallel；
The drain electrode of step 502, one end and switch mosfet pipe Q1 by capacitor C2 and coupling transformer inductance L4 after in parallel
The other end of capacitor C2 and coupling transformer inductance L4 after in parallel is connect by connection with the drain electrode of switch mosfet pipe Q2；
Step 6: connection comparator U1, comparator U2, power drives chip TPS2812, diode D1 and diode D2,
And resistance R3, resistance R4, resistance R7, resistance R8, resistance R9, resistance R10, resistance R11, resistance R13, resistance R14, resistance
R16, resistance R17, resistance R18, resistance R19 and resistance R20 constitute drive control circuit 1；Detailed process are as follows:
One end of resistance R9 is connect by step 601 with the drain electrode of switch mosfet pipe Q2, and the other end of resistance R9 is passed through
Resistance R8 ground connection；
One end of resistance R14 is connect by step 602 with the drain electrode of switch mosfet pipe Q1, and the other end of resistance R14 is led to
Cross resistance R16 ground connection；
Step 603 connects the cathode of the anode of diode D1 and diode D2 with the connecting pin of resistance R9 and resistance R8
It connects, the anode of the cathode of diode D1 and diode D2 is connect with the connecting pin of resistance R14 and resistance R16；
One end of resistance R10 and one end of resistance R18 are connect with the connecting pin of resistance R8 and resistance R9 by step 604；
Step 605 connects one end of resistance R13 and one end of resistance R17 with the connecting pin of resistance R14 and resistance R16
It connects；
The inverting input terminal of comparator U1 is connect by step 606 with the other end of resistance R10, by the same phase of comparator U1
Input terminal is connect with the other end of resistance R13；
The inverting input terminal of comparator U2 is connect by step 607 with the other end of resistance R17, by the same phase of comparator U2
Input terminal is connect with the other end of resistance R18；
Step 608 connects resistance R7 between the negative voltage power supply VEE and inverting input terminal of comparator U1, by resistance R20
The negative voltage connect in comparator U2 is powered between VEE and inverting input terminal；
Step 609 connects resistance 11 between the positive voltage power supply VCC and output end of comparator U1, and resistance 19 is connect
Between the positive voltage power supply VCC and output end of comparator U2；
The 2nd pin of power drives chip TPS2812 is connect by step 6010 with comparator U2 output end, and power supply is driven
The 3rd pin ground connection of dynamic chip TPS2812, the 4th pin of power drives chip TPS2812 and comparator U1 output end are connected
It connects, the 7th pin of power drives chip TPS2812 is connect by resistance R3 with the grid of switch mosfet pipe Q1, by power supply
The 5th pin of driving chip TPS2812 is connect by resistance R4 with the grid of switch mosfet pipe Q2；
Step 7: connection switch mosfet pipe Q3, resistance R6, resistance 12, resistance 15, thyristor Q4, diode D3, two poles
Pipe D4, diode D5, diode D6 and diode D7 constitute start-oscillation circuit 4；Detailed process are as follows:
The drain electrode of switch mosfet pipe Q3 is connect by step 701 with the drain electrode of switch mosfet pipe Q1, by switch mosfet
The source electrode of pipe Q3 is grounded by resistance R15, the grid of switch mosfet pipe Q3 is connect with the cathode of diode D7, by diode
The anode of D7 passes through the output end VCC connection of resistance R6 and external power supply；
Step 702 connects resistance R12 between the grid and source electrode of switch mosfet pipe Q3；
The anode of thyristor Q4 is connect by step 703 with the anode of diode D7, will by the minus earth of thyristor Q4
The gate pole of thyristor Q4 is connect with the source electrode of switch mosfet pipe Q3；
Anode after diode D3 and diode D4 series connection is connect by step 704 with the anode of thyristor Q4, by diode
Cathode after D3 and diode D4 series connection is connect with the inverting input terminal of comparator U2；
Anode after diode D5 and diode D6 series connection is connect by step 705 with the anode of thyristor Q4, by diode
Cathode after D5 and diode D6 series connection is connect with the inverting input terminal of comparator U1.
The working principle of the utility model self-excitation inductively start-oscillation circuit of power transmission system are as follows: after circuit powers on,
VCC powers to start-oscillation circuit, and thyristor Q4 is in off state at this time, and VCC is maintaining resistance R6 and drive control electricity through current limliting
Road 1 passes through buck diode D7 and provides cut-in voltage to the grid of the switch mosfet pipe Q3 of start-oscillation circuit 4 after dividing, make
Switch mosfet pipe Q3 conducting；After the switch mosfet pipe Q3 conducting of start-oscillation circuit 4, the electric current of current source output pours into Resonance Neural Network
Network 3 simultaneously makes 3 energy storage of resonant network, flows back to electric current through switch mosfet pipe Q3 and sampling resistor R15 after electric current outflow resonant network 3
Source cathode；Due to sampling resistor R15 and the equal very little of switch mosfet pipe Q3 drain-source conducting resistance, the electric current in starting of oscillation circuit 4 is flowed through
It can rise rapidly, it is brilliant when electric current rises to, and the voltage at the both ends sampling resistor R15 is made to reach the gate trigger voltage of thyristor Q4
Brake tube Q4 conducting；Later, thyristor Q4 anode voltage is clamped down on by its conduction voltage drop in 0.8V；Thyristor Q4 anode voltage is through being depressured
It is added on the grid of switch mosfet pipe Q3 of start-oscillation circuit 4 after diode D7 decompression, makes the grid source electricity of switch mosfet pipe Q3
It forces down in the threshold voltage of switch mosfet pipe Q3, guarantees switch mosfet pipe Q3 reliable turn-off, after 3 energy storage of resonant network, drive
Dynamic circuit 1 is started to work, and is realized start-oscillation circuit 4 by diode D3, diode D4, diode D5 and diode D6 at this time and is driven
Dynamic circuit 1 is isolated, and prevents start-oscillation circuit 4 from interfering to driving circuit 1, the electricity that driving circuit 1 passes through acquisition resonant network 3
Pressure exports the driving signal of two-way complementation, is finally reached frequency-tracking by two-way Zero-cross comparator.
The above is only the preferred embodiment of the utility model, not imposes any restrictions to the utility model, all
According to any simple modification to the above embodiments of the utility model technical spirit, change and equivalent structural changes, still
Belong in the protection scope of technical solutions of the utility model.
Claims (5)
1. a kind of start-oscillation circuit of self-excitation inductively power transmission system, inductively power transmission system includes for the self-excitation
Inverter (2) and resonant network (3), it is characterised in that: the start-oscillation circuit of the self-excitation inductively power transmission system
Including drive control circuit (1) and start-oscillation circuit (4)；The inverter (2) includes that switch mosfet pipe Q1, MOSFET are opened
Close pipe Q2, inductance L1, inductance L2, inductance L3, resistance R2 and resistance R5, the inductance L2 and inductance L3 series connection after one end with
The leakage of the other end and switch mosfet pipe Q2 after the drain electrode connection of switch mosfet pipe Q1, the inductance L2 and inductance L3 series connection
Pole connection, one end of the inductance L1 are connect with the connecting pin of inductance L2 and inductance L3, and the other end of the inductance L1 is inversion
The input terminal Vi of converter (2), the resistance R5 connect between the grid and source electrode of switch mosfet pipe Q1, and the resistance R2 connects
Between the grid and source electrode of switch mosfet pipe Q2；The resonant network (3) includes capacitor C2 and coupling transformer in parallel
One end after inductance L4, the capacitor C2 and coupling transformer inductance L4 are in parallel is connect with the drain electrode of switch mosfet pipe Q1, institute
The other end after stating capacitor C2 and the L4 parallel connection of coupling transformer inductance is connect with the drain electrode of switch mosfet pipe Q2；
The drive control circuit (1) includes comparator U1, comparator U2, power drives chip TPS2812, diode D1 and two
Pole pipe D2 and resistance R3, resistance R4, resistance R7, resistance R8, resistance R9, resistance R10, resistance R11, resistance R13, resistance
R14, resistance R16, resistance R17, resistance R18, resistance R19 and resistance R20；One end of the resistance R9 and switch mosfet pipe Q2
Drain electrode connection, one end of the resistance R14 connect with the drain electrode of switch mosfet pipe Q1, and the other end of the resistance R9 passes through
Resistance R8 ground connection, the other end of the resistance R14 is grounded by resistance R16, the anode of the diode D1 and diode D2's
Cathode is connect with the connecting pin of resistance R9 and resistance R8, and the anode of the cathode of the diode D1 and diode D2 are and resistance
R14 is connected with the connecting pin of resistance R16, and one end of the resistance R10 and one end of resistance R18 are with resistance R8's and resistance R9
Connecting pin connection, one end of the resistance R13 and one end of resistance R17 are connect with the connecting pin of resistance R14 and resistance R16,
The inverting input terminal of the comparator U1 is connect with the other end of resistance R10, the non-inverting input terminal and resistance of the comparator U1
The other end of R13 connects, and the inverting input terminal of the comparator U2 is connect with the other end of resistance R17, the comparator U2's
Non-inverting input terminal is connect with the other end of resistance R18, the resistance R7 connect comparator U1 negative voltage power VEE and reverse phase it is defeated
Enter between end, the resistance R20 connects between the negative voltage power supply VEE and inverting input terminal of comparator U2, and the resistance 11 connects
Power between VCC and output end in the positive voltage of comparator U1, the resistance 19 connect comparator U2 positive voltage power supply VCC and
Between output end, the 2nd pin of the power drives chip TPS2812 is connect with comparator U2 output end, the power drives
The 3rd pin of chip TPS2812 is grounded, and the 4th pin and comparator U1 output end of the power drives chip TPS2812 connects
It connects, the 7th pin of the power drives chip TPS2812 is connect by resistance R3 with the grid of switch mosfet pipe Q1, described
The 5th pin of power drives chip TPS2812 is connect by resistance R4 with the grid of switch mosfet pipe Q2；
The start-oscillation circuit (4) include switch mosfet pipe Q3, resistance R6, resistance 12, resistance 15, thyristor Q4, diode D3,
Drain electrode and the switch mosfet pipe Q1 of diode D4, diode D5, diode D6 and diode D7, the switch mosfet pipe Q3
Drain electrode connection, the source electrode of the switch mosfet pipe Q3 is grounded by resistance R15, the grid of the switch mosfet pipe Q3 and
The cathode of diode D7 connects, and the anode of the diode D7 passes through the output end VCC connection of resistance R6 and external power supply, described
Resistance R12 connects between the grid and source electrode of switch mosfet pipe Q3, the anode of the thyristor Q4 and the anode of diode D7
Connection, the gate pole of the minus earth of the thyristor Q4, the thyristor Q4 is connect with the source electrode of switch mosfet pipe Q3, described
Anode after diode D3 and diode D4 series connection is connect with the anode of thyristor Q4, the diode D3 and diode D4 series connection
Cathode afterwards is connect with the inverting input terminal of comparator U2, the diode D5 and diode D6 series connection after anode and thyristor
Cathode after the anode connection of Q4, the diode D5 and diode D6 series connection is connect with the inverting input terminal of comparator U1.
2. a kind of start-oscillation circuit of self-excitation described in accordance with the claim 1 inductively power transmission system, it is characterised in that: institute
The model for stating switch mosfet pipe Q1, switch mosfet pipe Q2 and switch mosfet pipe Q3 is IRF640.
3. a kind of start-oscillation circuit of self-excitation described in accordance with the claim 1 inductively power transmission system, it is characterised in that: institute
State the model MCR100-6 of thyristor Q4.
4. a kind of start-oscillation circuit of self-excitation described in accordance with the claim 1 inductively power transmission system, it is characterised in that: institute
It states comparator U1 and comparator U2 is respectively two comparators inside comparator chip LM319.
5. a kind of start-oscillation circuit of self-excitation described in accordance with the claim 1 inductively power transmission system, it is characterised in that: institute
The model for stating diode D1, diode D2, diode D3, diode D4, diode D5, diode D6 and diode D7 is
1N4148。
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821678125.XU CN208723632U (en) | 2018-10-16 | 2018-10-16 | A kind of start-oscillation circuit of self-excitation inductively power transmission system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821678125.XU CN208723632U (en) | 2018-10-16 | 2018-10-16 | A kind of start-oscillation circuit of self-excitation inductively power transmission system |
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| CN208723632U true CN208723632U (en) | 2019-04-09 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109245330A (en) * | 2018-10-16 | 2019-01-18 | 西安科技大学 | A kind of push-pull type ICPT self-excitation starting of oscillation control circuit and its design method |
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2018
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109245330A (en) * | 2018-10-16 | 2019-01-18 | 西安科技大学 | A kind of push-pull type ICPT self-excitation starting of oscillation control circuit and its design method |
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Granted publication date: 20190409 Termination date: 20191016 |