CN106533140A - High-efficiency magnetic tuning device drive circuit - Google Patents
High-efficiency magnetic tuning device drive circuit Download PDFInfo
- Publication number
- CN106533140A CN106533140A CN201710003385.0A CN201710003385A CN106533140A CN 106533140 A CN106533140 A CN 106533140A CN 201710003385 A CN201710003385 A CN 201710003385A CN 106533140 A CN106533140 A CN 106533140A
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- Prior art keywords
- circuit
- voltage
- tuning device
- magnetic tuning
- power tube
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/14—Arrangements for reducing ripples from dc input or output
- H02M1/143—Arrangements for reducing ripples from dc input or output using compensating arrangements
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
- H02M3/1584—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load with a plurality of power processing stages connected in parallel
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Amplifiers (AREA)
Abstract
The invention discloses a high-efficiency magnetic tuning device drive circuit, which comprises an input voltage circuit, a magnetic tuning device, a DC/DC converter and a voltage-controlled linear constant-current source circuit, wherein the voltage-controlled linear constant-current source circuit comprises a current sampling circuit, a power tube, a set voltage circuit and an error amplifier circuit; the input voltage circuit passes through the DC/DC converter, the current sampling circuit and the power tube and then is connected with the magnetic tuning device, so that a constant magnetic field is generated in the magnetic tuning device; an output end of the current sampling circuit and the set voltage circuit are simultaneously connected to the error amplifier circuit; and the error amplifier circuit controls the magnitude of output current of the power tube. The high-efficiency magnetic tuning device drive circuit has the advantages of high performance and low interference, can adapt to a wide input voltage range and is suitable for driving the multi-channel magnetic tuning device, the drive efficiency can be greatly improved, the power consumption of a system and the temperature rise of a product are reduced and the reliability of the product is improved.
Description
Technical field
The present invention relates to a kind of magnetic tuning drive circuit, more particularly to a kind of high-efficiency magnetic tuning device drive circuit.
Background technology
Need to provide high accuracy, tunable stationary magnetic field when magnetic tuning device works, conventional implementation method is logical at present
Device of overdriving provides constant current and realizes stationary magnetic field, the general single-stage linear constant current circuit structure using as shown in Fig. 1 of the present invention
Into driver, the circuit obtains the current value by magnetic tuning device winding by current sampling circuit, then with setting voltage
It is compared, the conducting resistance of Darlington transistor is controlled by V/I amplifying circuits, is put on magnetic tuning device winding so as to change
Electric current, obtain tunable stationary magnetic field in magnetic tuning device inside, the circuit can be with the stationary magnetic field of excellent.
Another kind of improved though is Mono-pole switch constant-current circuit, its principle such as Fig. 2 of the present invention, the circuit by sampling, instead
The mode of feedback is realized, but the setting end of DC/DC circuits is fed back to after realizing constant current, i.e. current sampling using DC/DC translation circuits,
Magnetic tuning is realized by changing DC/DC voltage outputs, system effectiveness is greatly improved using the DC/DC of PWM mode.
But the problem of single-stage linear constant current is：
1st, operating voltage range is narrow, and efficiency is low.
As input and output electric current is equal, therefore its drive efficiency η is：
Wherein, VdFor magnetic tuning device operating voltages, ViFor input voltage.
Knowable to the formula, drive efficiency is drastically reduced with the rising of input voltage, and the driver of magnetic tuning device
General and system adapted, typically provides 12V/24V bus voltages by user, if efficiency will be improved, needs user to provide special
Fixed voltage.
2nd, Darlington transistor pressure drop is excessive
Darlington transistor saturation voltage about 2V, substantial amounts of power consumption is on Darlington transistor, it is therefore desirable to select large volume
Device, and enough cooling measures are taken, even if so, the temperature rise of Darlington transistor is still very high.
By taking ZJS00806J7 type numerical control YIG band filters as an example, its maximum operation frequency be 6GHz, required maximum drive
Electric current is 460mA, and now running voltage is 4.8V, and when it is 9V that user provides input voltage, drive efficiency is 53%, wherein having
The power of about 2W is slatterned in the form of heat energy, and the heat causes system temperature to raise, and reduces system reliability.When user adopts
When being driven with 12V or 24V bus voltages, then efficiency is lower, and temperature rise is higher.
Mono-pole switch constant-current circuit can realize high conversion efficiency, but the included switching harmonics voltage of its output can be coupled
To magnetic tuning device, so as to affect microwave property.
The content of the invention
The purpose of the present invention is that offer one kind solves the above problems, and is adapted to wide input voltage range, it is adaptable to
Multichannel magnetic tuning device is driven, drive efficiency can be greatly improved, reduce system power dissipation and product temperature rise, improve product reliability,
It is provided simultaneously with a kind of high-efficiency magnetic tuning device drive circuit of the advantage of high-performance and low interference.
To achieve these goals, the technical solution used in the present invention is such：A kind of high-efficiency magnetic tuning device drives
Galvanic electricity road, including input voltage circuit, magnetic tuning device, also including DC/DC changers and voltage-controlled linear constant current source circuit；
The voltage-controlled linear constant current source circuit includes that current sampling circuit, power tube, setting voltage circuit, error amplify electricity
Road,
The input voltage circuit Jing DC/DC changers, current sampling circuit, power tube are followed by magnetic tuning device, make magnetic
Stationary magnetic field is produced inside tuning device,
The outfan of the current sampling circuit is linked in error amplifying circuit simultaneously with setting voltage circuit；
The outfan of the error amplifying circuit connects the control end of power tube；For amplifying setting voltage and voltage amplification
The difference of circuit output voltage, and difference voltage is sent into the control end of power tube, control the size of its output current.
As preferred：Filter circuit is additionally provided between the input voltage circuit and DC/DC variators, the power tube is
Mosfet or transistor.
As preferred：The filter circuit is PI type filter circuits, and the DC/DC variators are BUCK changing type DC/DC
Or Boost changing type DC/DC, the current sampling circuit is that high-precision and high-stability noninductive resistance or resistance amplifier are combined,
The error amplifying circuit is adder circuit or application condition circuit.
In the present invention, the filter circuit is for being filtered to input voltage, and filters interference of the DC/DC to being input into；
The DC/DC changers are for being converted to threshold voltage in the middle of suitable by filtered input voltage；
The voltage-controlled linear constant current source circuit is used to provide constant current, so as to permanent needed for producing in magnetic tuning device inside
Fixed-field eliminates the switching harmonics voltage that prime DC/DC is produced simultaneously；
The magnetic tuning device inside magnetic field intensity is with curent change；
As the voltage-controlled linear constant current source circuit includes that current sampling circuit, power tube, setting voltage circuit, error are put
Big circuit, wherein：
The current sampling circuit is used to detect the magnetic field intensity that electric current obtains magnetic tuning device, and converts electrical current into electricity
Pressure；Here, current sampling circuit can be realized by a big resistance, it is also possible to put by small resistor two ends one voltage of parallel connection
Big circuit realiration；
Control realization constant current output of the power tube by error voltage；
The error amplifying circuit is used for the difference for amplifying setting voltage and current sampling circuit output voltage；
The setting voltage circuit is used to produce setting voltage, and we pass through the control source for changing setting voltage circuit
Value, thus it is possible to vary the output voltage of error amplifying circuit, so as to change the size of voltage-controlled Linear CCS circuit output current, most
Change magnetic field intensity eventually.
Magnetic tuning device is the device being tuned by magnetic field with magnetic material as resonant element, and device can be shaken
Device or wave filter are swung, resonant element material can be monocrystalline or polycrystalline, and shape can be spherical, block or diaphragm shape.
Compared with prior art, it is an advantage of the current invention that：Drive there is provided a kind of high-efficiency driving circuit of new approaches
Magnetic tuning device, core are to realize driving by the way of DC/DC changers and voltage-controlled linear constant current source circuit are combined, comprehensive
The high efficiency of DC/DC and the low interference of Linear CCS, therefore performance is not affected while efficiency is improved, and this
Bright prime DC/DC does not affect rear class Linear CCS for single feedback control loop, can also realize that multichannel drives.Have：
1st, wide input voltage range is adapted to, due to the Accommodation of prime DC/DC, input voltage can be very wide
In the range of change, and whole efficiency is not changed much.
2nd, driving effect can be greatly improved, system power dissipation is reduced, product temperature rise is reduced, product reliability is improved.
3rd, the advantage of high-performance and low interference is provided simultaneously with, prime DC/DC has very high efficiency, rear class Linear CCS
With very high constant current performance, while the switching harmonics voltage of prime DC/DC generation can be eliminated for the shadow of magnetic tuning device
Ring.
4th, it is flexible for installation, it is applicable to various current classes.Linear CCS is realized using discrete device, can be adapted to
The position of radiating is installed, such that it is able to meet various current class requirements.
So the present invention is applied to magnetic tuning device, with input range width, efficiency high, while the spy of high current can be had
Point.The drive circuit can solve the problems, such as that existing magnetic tuning device drive efficiency is low, with very strong practical value.
Description of the drawings
Fig. 1 is single-stage linear constant current circuit of the prior art；
Fig. 2 is Mono-pole switch constant-current circuit of the prior art；
Fig. 3 is the circuit theory diagrams of the present invention；
Circuit diagrams of the Fig. 4 for the embodiment of the present invention 2.
Fig. 5 is efficiency comparative figure of the embodiment 1 from the method for prior art under different input voltages.
Specific embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
Embodiment 1：Referring to Fig. 1 to Fig. 3, a kind of high-efficiency magnetic tuning device drive circuit, including input voltage circuit, magnetic
Tuning device, also including DC/DC changers and voltage-controlled linear constant current source circuit；
The voltage-controlled linear constant current source circuit includes that current sampling circuit, power tube, setting voltage circuit, error amplify electricity
Road,
The input voltage circuit Jing DC/DC changers, current sampling circuit, power tube are followed by magnetic tuning device, make magnetic
Stationary magnetic field is produced inside tuning device,
The outfan of the current sampling circuit is linked in error amplifying circuit simultaneously with setting voltage circuit；
The outfan of the error amplifying circuit connects the control end of power tube；For amplifying setting voltage and voltage amplification
The difference of circuit output voltage, and difference voltage is sent into the control end of power tube, control the size of its output current.
In the present embodiment, filter circuit, the filter circuit between the input voltage circuit and DC/DC variators, are additionally provided with
For PI type filter circuits, the power tube is mosfet or transistor, the DC/DC variators be BUCK changing types DC/DC or
Boost changing type DC/DC, the current sampling circuit are that high-precision and high-stability noninductive resistance or resistance amplifier are combined, institute
Error amplifying circuit is stated for adder circuit or application condition circuit.In the present embodiment, if power tube is mosfet, control end is
Grid, if power tube is transistor, control pipe is then base stage.
Certainly, each module is not limited only to the form described in the present embodiment.
In invention, first, the filtered circuit filtering of input voltage, DC/DC changers are converted to threshold voltage in the middle of suitable,
After current sampling circuit, there is provided to power tube, it is generated by it constant current to make magnetic tuning device produce magnetic field, is set by changing
Determine voltage, the output of error amplifying circuit can be changed, so as to change the constant current size of power tube output, so as to change magnetic field.
The present invention can reduce system power dissipation, improve drive efficiency.
If η is driver overall efficiency, VdFor magnetic tuning device operating voltages, VoFor the output voltage of DC/DC, ηdFor DC/
The conversion efficiency of DC, generally 90%～97%, then adopt the overall efficiency of this programme for:
Adopt the drive circuit than single-stage linear constant current circuit saving power P for：
Wherein, ViFor input voltage, IdFor magnetic tuning device operation current.
Input is assumed for 9-24V, DC/DC conversion efficiencies are 90%, magnetic tuning device ZLT00806J7 type numerical control YIG band logicals
Wave filter, it is 2140Gs which works in required magnetic field intensity during highest frequency, and correspondence required voltage is 5V, Vo6V is set to, then
Efficiency comparative of the method for the embodiment of the present invention and prior art under different input voltages sees Fig. 5, it can be seen that in wide input
In the range of, it is improved significantly using the present invention program drive efficiency.
Embodiment 2：Referring to Fig. 4, for further description the solution of the present invention, referring to Fig. 4, according to present invention think of
Road, devises a kind of specific circuit.
In figure, the input voltage range is 7～36VDC,
L2, C4, C5 constitute PI type filter circuits；
U6, C2, L1, C3, R7, R9 constitute BUCK changing type DC/DC, and wherein R7, R9 arrange the output voltage of the DC/DC,
Wherein U6 adopts LT8609, but is not excluded for other DC/DC control chips；
R1, Q1, U2, R4, C1, R3, R5, U3, U4, R2 constitute can with numerically controlled voltage controlled current source, wherein：
R1 and U2 constitutes current sampling circuit, and R1 is sample resistance, by detecting that electric current obtains the magnetic field of magnetic tuning device
Intensity, and voltage is converted electrical current into, U2 is that high-performance current detects amplifier, model AD8418, for amplifying sampling electricity
Pressure, by the combination of this little sample resistance and amplifying circuit, can reduce sample resistance power consumption, so as to improve overall drive circuit
Efficiency.
Q1 is high-performance N_MOSFET power tube IRF120N, and which receives the control realization constant current output of error voltage；
U3 be high accuracy DAC, model MAX5541, by SPI control break setting voltages；
U4A and perimeter capacitance resistance constitute error amplifying circuit, and the circuit is by amplifying setting voltage and current sample
The difference of voltage produces error voltage, and the error voltage acts on the grid of Q1, and the conducting resistance for changing Q1 realizes constant current output.
U1 is magnetic tuning device, is ZLT00806J7 type numerical control YIG band filters.
R6, Q2, U7, R8, C6, R10, R11, R12, U4B, U8, U5 also constitute one can be with numerically controlled voltage-controlled perseverance
Stream source, its function with it is above-mentioned can be identical with numerically controlled voltage controlled current source, repeat no more.
Input voltage Jing PI types filter circuit is filtered, and Jing DC/DC changers are converted into threshold voltage in the middle of suitable, then by R1
Sampling, it is final to send into Jing after MOSFET power tubes in magnetic tuning device, constant magnetic field is produced, after R1 samplings, Jing voltage amplifications,
Send in error amplifying circuit together with setting voltage circuit U 5 and U4B again, by the magnitude of voltage for changing setting voltage, Ke Yigai
Become error voltage, so as to reach the purpose for changing YIG operating frequencies.
Certainly, the present embodiment is only a kind of mode of the present invention, and remaining circuit can meet thinking of the present invention, in the present invention
In protection domain.
Claims (3)
1. a kind of high-efficiency magnetic tuning device drive circuit, including input voltage circuit, magnetic tuning device, it is characterised in that：Also
Including DC/DC changers and voltage-controlled linear constant current source circuit；
The voltage-controlled linear constant current source circuit includes current sampling circuit, power tube, setting voltage circuit, error amplifying circuit,
The input voltage circuit Jing DC/DC changers, current sampling circuit, power tube are followed by magnetic tuning device, make magnetic tuning
Device inside produces stationary magnetic field,
The outfan of the current sampling circuit is linked in error amplifying circuit simultaneously with setting voltage circuit；
The outfan of the error amplifying circuit connects the control end of power tube；For amplifying setting voltage and voltage amplifier circuit
The difference of output voltage, and difference voltage is sent into the control end of power tube, control the size of its output current.
2. a kind of high-efficiency magnetic tuning device drive circuit according to claim 1, it is characterised in that：The input voltage
Filter circuit is additionally provided between circuit and DC/DC variators, the power tube is mosfet or transistor.
3. a kind of high-efficiency magnetic tuning device drive circuit according to claim 2, it is characterised in that：The filter circuit
For PI type filter circuits, the DC/DC variators are BUCK changing type DC/DC or Boost changing type DC/DC, and the electric current takes
Sample circuit is that high-precision and high-stability noninductive resistance or resistance amplifier are combined, the error amplifying circuit be adder circuit or
Application condition circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710003385.0A CN106533140A (en) | 2017-01-04 | 2017-01-04 | High-efficiency magnetic tuning device drive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710003385.0A CN106533140A (en) | 2017-01-04 | 2017-01-04 | High-efficiency magnetic tuning device drive circuit |
Publications (1)
| Publication Number | Publication Date |
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| CN106533140A true CN106533140A (en) | 2017-03-22 |
Family
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710003385.0A Pending CN106533140A (en) | 2017-01-04 | 2017-01-04 | High-efficiency magnetic tuning device drive circuit |
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