CN109194138A - A kind of controlled resonant converter and control method of interlocking - Google Patents
A kind of controlled resonant converter and control method of interlocking Download PDFInfo
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- CN109194138A CN109194138A CN201811093249.6A CN201811093249A CN109194138A CN 109194138 A CN109194138 A CN 109194138A CN 201811093249 A CN201811093249 A CN 201811093249A CN 109194138 A CN109194138 A CN 109194138A
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- 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
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33569—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
- H02M3/33576—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements having at least one active switching element at the secondary side of an isolation transformer
-
- 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
- H02M1/0048—Circuits or arrangements for reducing losses
- H02M1/0054—Transistor switching losses
- H02M1/0058—Transistor switching losses by employing soft switching techniques, i.e. commutation of transistors when applied voltage is zero or when current flow is zero
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention discloses a kind of controlled resonant converter and control methods of interlocking, staggeredly controlled resonant converter includes DC power supply, inverter circuit, resonance circuit, transformer circuit, rectification circuit and filter circuit, controlled resonant converter further includes sampling control circuit, and sampling control circuit is connected with the primary side of inverter circuit, rectification circuit, filter circuit and transformer circuit or/and primary side respectively.The adjusting to output voltage is realized by sampling control circuit frequency control inverter circuit and delays time to control rectification circuit, delays time to control is realized based on the shutdown of the zero crossing delay respective secondary switching tube in secondary current or primary current, delays time to control increases the energy in resonance circuit, make staggeredly controlled resonant converter have boosting characteristic, control frequency range is greatly reduced to realize wide input voltage range or/and wide output voltage range in the controlled resonant converter that interlocks, it is narrow to solve the output voltage range of controlled resonant converter, and control the big problem of frequency range.
Description
Technical field
The present invention relates to applied power electronics technical fields, more particularly to a kind of controlled resonant converter and control method of interlocking.
Background technique
Controlled resonant converter due to its simple circuit topology, and can full-load range realize Sofe Switch characteristic,
Controlled resonant converter is widely used in providing the state-of-the-art power supply of maximum power density and efficiency.Although controlled resonant converter has realization
Switching device Sofe Switch, switching loss is small, it is high-efficient and relative to hard switching have superior EMI (Electromagnetic
Interference, electromagnetic interference) performance many advantages, such as, but defect is still obvious, such as the input voltage of controlled resonant converter
Range or output voltage range are relatively narrow.
Due to the limitation of the prior art, main stream approach is to make the defeated of controlled resonant converter by increasing control frequency range at present
Voltage range or/output voltage range broaden out, but with the increase of input voltage range or output voltage range, control frequency
Range also increases, so that switching tube and magnetic element loss also increase, and then reduces transfer efficiency.
Summary of the invention
For overcome the deficiencies in the prior art, it is an object of the invention to one kind interlock controlled resonant converter and control method,
The output voltage range for solving controlled resonant converter is narrow, and controls the big problem of frequency range.
The purpose of the present invention adopts the following technical scheme that realization:
A kind of controlled resonant converter that interlocks, including DC power supply, inverter circuit, resonance circuit, the transformer being sequentially connected electrically
Circuit, rectification circuit and filter circuit further include sampling control circuit, and the control terminal of the sampling control circuit is separately connected institute
State the control terminal of inverter circuit and the control terminal of the rectification circuit；The sampling end of the sampling control circuit is separately connected described
The output end of the input terminal of inverter circuit and the filter circuit；The test side of the sampling control circuit is separately connected the change
The primary side or/and primary side of transformer circuits.
Based on above-mentioned staggeredly controlled resonant converter, sampling control circuit samples the input voltage and filter circuit of inverter circuit
Output voltage, and the primary current or/and secondary current of detection transformer circuit, output of the sampling control circuit to sampling
Voltage obtains pwm signal after carrying out operation, and according to the primary switch pipe in obtained pwm signal driving inverter circuit, thus
Realize the purpose of the primary switch pipe in frequency control inverter circuit；Sampling control circuit is defeated according to the inverter circuit sampled
The output voltage or setting voltage Vref for entering voltage or rectification circuit obtain delay time, according to delay time and detect first
The zero cross signal of grade electric current or secondary current carries out delays time to control to secondary switch pipe in rectification circuit.Pass through sampling control circuit
Frequency control inverter circuit and delays time to control rectification circuit realize the adjusting to output voltage, are based on secondary current or primary electrical
Delays time to control is realized in the shutdown of zero crossing delay respective secondary switching tube in stream, and delays time to control increases the energy in resonance circuit
Amount, make staggeredly controlled resonant converter there is boosting characteristic, staggeredly controlled resonant converter control frequency range be greatly reduced should realize width
Input voltage range or/and wide output voltage range, to reduce switching tube drive loss and turn-off power loss and magnetic
Property element loss, improve transfer efficiency, and then the output voltage range for solving controlled resonant converter is narrow, and control frequency range
Big problem.
Optionally, the sampling control circuit is microcontroller.
Optionally, the sampling control circuit includes that sampling calibration circuit, error amplifier, the loop being sequentially connected electrically are mended
Repay device, voltage controlled oscillator, delay controller and zero current detector；The sampling end of the sampling calibration circuit is separately connected described
The output end of the input terminal of inverter circuit and the filter circuit；The control terminal of the inverter circuit connects the voltage controlled oscillation
Device；The delay controller is separately connected the sampling calibration circuit and the zero current detector；The control of the rectification circuit
End processed connects the delay controller, and the test side of the zero current detector is separately connected the primary side of the transformer circuit
Or/and primary side.
The output voltage of sampling calibration circuit sampling filter circuit, and sampled after being calibrated to the output voltage sampled
Output voltage, and transmit it to error amplifier, error amplifier is according to the difference of sampling and outputting voltage and reference voltage
Error signal is obtained, and transmits it to loop compensator, loop compensator obtains fault in enlargement after compensating amplification to it
Signal, and fault in enlargement signal is transmitted to voltage controlled oscillator, voltage controlled oscillator is according to the value output frequency of fault in enlargement signal
Pwm signal, thus realize in inverter circuit primary switch pipe carry out frequency control；
Sampling calibration circuit also samples the input voltage of inverter circuit, and obtains after calibrating to the input voltage sampled
To sampled input voltage, and transmit it to delay controller；The primary current of zero current detector detection transformer circuit
Or/and secondary current, when the primary current or/and secondary current that detect transformer circuit are zero, by primary current or/and
The zero cross signal of secondary current is transmitted to delay controller；Delay controller according to sampled input voltage or sampling and outputting voltage or
Setting voltage Vref determines delay time, and according to the zero cross signal of delay time and primary current or secondary current to rectified current
Secondary switch pipe in road carries out delays time to control, increases the energy in resonance circuit based on delays time to control, makes staggeredly resonant transformation
Device has boosting characteristic, make staggeredly controlled resonant converter that control frequency range be greatly reduced realize wide input voltage range or/
It is improved with wide output voltage range to reduce switching tube drive loss and turn-off power loss and magnetic element loss
Transfer efficiency, and then the output voltage range for solving controlled resonant converter is narrow, and controls the big problem of frequency range.
Optionally, the inverter circuit includes at least three groups of primary switching circuits, and every group of primary switching circuit includes two
Primary switch pipe；Primary switch pipe described in one connects the anode of the DC power supply, and primary switch pipe described in one also passes through separately
The one primary switch pipe connects the negative terminal of the DC power supply, primary switch pipe described in one and another primary switch pipe
Common point connect the resonance circuit.For receiving the input voltage of DC power supply offer and transmitting it to resonance circuit.
Optionally, the resonance circuit includes at least three groups of resonance modules, and every group of resonance modules include resonant inductance harmony
Shake capacitor；One end of the resonant capacitance connects the common point of two primary switch pipes in corresponding group, the resonant capacitance
The primary side of the transformer circuit is connected through the resonant inductance.For receiving the output voltage of inverter circuit and being transmitted
To transformer circuit, and reduce the effect that primary switch pipe is lost in inverter circuit.
Optionally, the resonant inductance includes separate inductor or integrated inductor.
Optionally, the resonance circuit includes at least three groups of resonance modules, and every group of resonance modules include resonant inductance harmony
Shake capacitor；The resonant capacitance is connected in parallel on the primary side of the transformer circuit, and one end of the resonant inductance connects corresponding group
In two primary switch pipes common point, the other end of the resonant inductance connects the primary side of the transformer circuit.
For receiving the output voltage of inverter circuit and transmitting it to transformer circuit, and reduce primary switch pipe in inverter circuit
Loss.
Optionally, the transformer circuit includes at least three transformers, and the primary side of the transformer is star-like or triangle
Type interconnects, and the primary side of the transformer is star-like or triangular form interconnects, described in the primary side connection of the transformer
The primary side of resonant inductance, the transformer connects the rectification circuit.Output voltage for receiving resonance circuit becomes it
Rectification circuit is transmitted to after pressure.
Optionally, the transformer includes separated transformer or integrated transformer.
Optionally, the rectification circuit includes at least three groups of secondary switch circuits, and every group of secondary switch circuit includes two
Secondary switch pipe；Secondary switch pipe described in one connects transformation described in corresponding group with the common point of another secondary switch pipe
The primary side of device, secondary switch pipe described in one are connected another secondary switch pipe, secondary switch pipe described in one and another
The secondary switch pipe is separately connected the filter circuit.For receiving transformer circuit output voltage and it is rectified
After be transmitted to filter circuit.
Optionally, the controlled resonant converter is also applied for non-isolated controlled resonant converter.
The present invention also provides a kind of control method of staggeredly controlled resonant converter, the control methods, comprising:
The sampling control circuit samples the output voltage of the filter circuit, and after carrying out operation to the output voltage
Inverter circuit described in frequency control；
The sampling control circuit detects the primary current or/and secondary current of the transformer circuit, the sampling control
Circuit processed also samples the input voltage of the inverter circuit；
The sampling control circuit is according to the input voltage or the output voltage or setting voltage Vref sampled
Obtain delay time；
The sampling control circuit is according to the primary current or secondary current zero cross signal for detecting the transformer circuit
Delays time to control is carried out to the rectification circuit in conjunction with delay time.
Based on above-mentioned control method, the input of the output voltage and filter circuit of sampling control circuit sampling inverter circuit is enabled
Voltage, and the primary current or/and secondary current of detection transformer circuit, sampling control circuit is according to the output electricity sampled
Pressure carries out frequency control to inverter circuit, and sampling control circuit is determined according to output voltage or input voltage or setting voltage Vref
Delay time, and be delayed with the zero cross signal for detecting primary current or secondary current to rectification circuit according to delay time
Control；Based on delays time to control increase resonance circuit in energy, make staggeredly controlled resonant converter have boosting characteristic, make staggeredly resonance
Control frequency range is greatly reduced to realize wide input voltage range or/and wide output voltage range, to drop in converter
Low switching tube drive loss and turn-off power loss and magnetic element loss, improve transfer efficiency, and then solve resonance change
The output voltage range of parallel operation is narrow, and controls the big problem of frequency range.
Optionally, the sampling control circuit is according to the input voltage or the output voltage or setting electricity sampled
Pressure Vref obtains delay time, comprising:
The sampling control circuit is according to the input voltage or the output voltage or setting voltage Vref sampled
Delay time is obtained by calculating or inquiring the vector table that actual measurement obtains.
Optionally, it is equipped with dead time between the open and close in the inverter circuit with group primary switch pipe,
Dead time is equipped with between the open and close of group secondary switch pipe in the rectification circuit.It has risen in complementary primary switch pipe
Or the effect of zero voltage switching is realized in complementary secondary switch pipe.
Compared with prior art, the beneficial effects of the present invention are:
It is realized by sampling control circuit frequency control inverter circuit and delays time to control rectification circuit to output voltage
It adjusts, delays time to control is realized based on the shutdown of the zero crossing delay respective secondary switching tube in secondary current or primary current,
Delays time to control increase resonance circuit in energy, make staggeredly controlled resonant converter have boosting characteristic, make staggeredly controlled resonant converter it is big
Width reduces control frequency range to realize wide input voltage range or/and wide output voltage range, to reduce switch
Pipe drive loss and turn-off power loss and magnetic element loss, improve transfer efficiency；And then solve the defeated of controlled resonant converter
Voltage range is narrow out, and controls the big problem of frequency range.
Invention is further described in detail with reference to the accompanying drawings and detailed description.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram for staggeredly controlled resonant converter that the present embodiment one provides；
Fig. 2 is the structural schematic diagram for the sampling control circuit that the present embodiment one provides；
Fig. 3 is a kind of circuit diagram one for staggeredly controlled resonant converter that the present embodiment one provides；
Fig. 4 is the primary side control sequential figure and primary side current wave for the staggeredly controlled resonant converter that the present embodiment one provides
Shape；
Fig. 5 be the present embodiment one provide conventional control state under staggeredly controlled resonant converter primary side current waveform and
Control sequential figure；
Fig. 6 be the present embodiment one provide delays time to control state under staggeredly controlled resonant converter primary side current waveform and
Control sequential figure；
Fig. 7 is the control timing diagram of bridge arm on the rectification circuit of the offer of the present embodiment one；
Fig. 8 is the control timing diagram for the rectification circuit lower bridge arm that the present embodiment one provides；
Fig. 9 is a kind of circuit diagram two for staggeredly controlled resonant converter that the present embodiment three provides；
Figure 10 is a kind of control method flow chart for staggeredly controlled resonant converter that the present embodiment four provides；
Legend: 1- DC power supply, 2- inverter circuit, 3- resonance circuit, 4- rectification circuit, 5- filter circuit, 6- load, 7-
Sampling control circuit, 71- sampling calibration circuit, 72- error amplifier, 73- loop compensator, 74- voltage controlled oscillator, 75- prolong
When controller, 76- zero current detector.
Specific embodiment
In the following, being described further in conjunction with attached drawing and specific embodiment to the present invention, it should be noted that not
Under the premise of conflicting, new implementation can be formed between various embodiments described below or between each technical characteristic in any combination
Example.
Embodiment one
The present invention provides a kind of controlled resonant converter that interlocks, as shown in Figure 1, staggeredly controlled resonant converter include DC power supply 1, it is inverse
Power transformation road 2, resonance circuit 3, transformer circuit 4, rectification circuit 5, filter circuit 6, sampling control circuit 7 and load, direct current
The input terminal of the output end connection inverter circuit 2 in source 1, the input terminal of the output end connection resonance circuit 3 of inverter circuit 2, resonance
The primary side of the output end connection transformer circuit 4 of circuit 3, the input of the primary side connection rectification circuit 5 of transformer circuit 4
End, the input terminal of the output end connection filter circuit 6 of rectification circuit 5, the output end of filter circuit 6 connect load, controlling of sampling
The control terminal of circuit 7 is separately connected the control terminal of inverter circuit 2 and the control terminal of rectification circuit 5, the sampling of sampling control circuit 7
End is separately connected the input terminal of inverter circuit 2 and the output end of filter circuit 6, and the test side of sampling control circuit 7 is separately connected
The primary side or/and primary side of transformer circuit 4.
Above-mentioned staggeredly controlled resonant converter control principle: sampling control circuit 7 samples input voltage and the filtering of inverter circuit 2
The output voltage of circuit 6, and the primary current or/and secondary current of detection transformer circuit 4, sampling control circuit 7 is to adopting
Sample to output voltage or electric current carry out operation after obtain pwm signal, and according in obtained pwm signal driving inverter circuit 2
Primary switch pipe, to realize the purpose of the primary switch pipe in frequency control inverter circuit 2；Pass through the input electricity sampled
Pressure or output voltage or setting voltage Vref directly calculate or inquire the vector table that actual measurement obtains and obtain delay time, in conjunction with sampling
Control circuit 7 detects the zero cross signal of primary current or secondary current, is delayed to zero cross signal, thus when realizing delay
Between control rectification circuit 5 in secondary switch pipe purpose；
The output electricity of filter circuit 6 is adjusted using the combination of frequency control and delays time to control based on sampling control circuit 7
Pressure, due to delays time to control increase resonance circuit 3 in energy, make staggeredly controlled resonant converter have boosting characteristic, make staggeredly resonance
Control frequency range is greatly reduced to realize wide input voltage range or/and wide output voltage range, to solve in converter
Determined staggeredly controlled resonant converter output voltage range it is narrow, and control the big problem of frequency range；Meanwhile the control frequency range
Reduction, also reduce switching tube drive loss and turn-off power loss and magnetic element loss, improve transfer efficiency.
In the application with wide input voltage range or wide output voltage range, delay time control reduces staggeredly humorous
The control frequency range of vibration converter；In the application with substantially constant output voltage and wide input voltage range, when delay
Between only in response to input voltage range.Similarly, in the application with substantially constant input voltage and wide output voltage range, delay
Time is only in response to output voltage range.
As shown in Fig. 2, sampling control circuit 7 include sampling calibration circuit 71, error amplifier 72, loop compensator 73,
The sampling end of voltage controlled oscillator 74, delay controller 75 and zero current detector 76, sampling calibration circuit 71 is separately connected inversion
The input terminal of circuit 2 and the output end of rectification circuit 5, the input of the output end connection error amplifier 72 of sampling calibration circuit 71
The output end connection at end, the input terminal of the output end linkloop compensator 73 of error amplifier 72, loop compensator 73 is voltage-controlled
The defeated of circuit 71 is calibrated in the input terminal of oscillator 74, the control terminal of the control terminal connection inverter circuit 2 of voltage controlled oscillator 74, sampling
Outlet is also connected with the input terminal of delay controller 75, the control terminal of the control terminal connection rectification circuit 5 of delay controller 75, delay
The input terminal of controller 75 is also connected with zero current detector 76, the sampling end connection transformer circuit 4 of zero current detector 76
Primary side or/and primary side.
Above-mentioned 7 working principle of sampling control circuit: sampling calibration circuit 71 samples the output voltage of filter circuit 6
Sampling and outputting voltage is obtained after calibration, and transmits it to error amplifier 72, and error amplifier 72 is according to sampling output electricity
Pressure and the difference of reference voltage obtain error signal, and transmit it to loop compensator 73, and loop compensator 73 carries out it
Fault in enlargement signal is obtained after compensation amplification, and fault in enlargement signal is transmitted to voltage controlled oscillator 74, voltage controlled oscillator 74
According to the pwm signal of the value output frequency of fault in enlargement signal, thus the primary switch pipe in frequency control inverter circuit 2；
Sampling calibration circuit 71 obtains sampled input voltage after carrying out sampling calibration to the input voltage of inverter circuit 2, and
Sampling and outputting voltage and sampled input voltage are transmitted to delay controller 75, and zero current detector 76 detects transformer circuit 4
Primary current or/and secondary current, when detecting primary current or secondary current zero passage, and by primary current or secondary current
Zero cross signal be transmitted to delay controller 75, delay controller 75 is according to sampling and outputting voltage or sampled input voltage or setting
Voltage Vref determines delay time, according to delay time and the zero cross signal for detecting primary current or secondary current, to zero passage
Signal is delayed, thus the secondary switch pipe in delay time control rectification circuit 5.
Wherein, sampling control circuit 7 is not limited only to the form of expression of Fig. 2, and sampling control circuit 7 can also be microcontroller
Or digital processing unit, details are not described herein again.
Optionally, inverter circuit 2 includes at least three groups of primary switching circuits, and every group of primary switching circuit includes two primary
Switching tube, one primary switch pipe connect the anode of the DC power supply 1, and one primary switch pipe is also through another primary switch pipe
The negative terminal of DC power supply 1 is connected, one primary switch pipe connects the resonance circuit 3 with the common point of another primary switch pipe.
By taking inverter circuit 2 includes three groups of primary switching circuits as an example, every group of primary switching circuit includes two primary switch
The type of pipe, the primary switch pipe can be field-effect tube, insulated gate bipolar transistor (IGBT), gallium nitride (GaN) etc. half
Conductor power switch tube, and the type of the primary switch pipe in the present embodiment is field-effect tube.
As shown in figure 3, inverter circuit 2 includes first group of primary switching circuit, second group of primary switching circuit and third group
Primary switching circuit, first group of primary switching circuit include the first primary switch pipe Q1 and the second primary switch pipe Q2, and second group
Primary switching circuit includes third primary switch pipe Q3 and the 4th primary switch pipe Q4, and third group primary switching circuit includes the 5th
Primary switch pipe Q5 and the 6th primary switch pipe Q6, the first primary switch pipe Q1 connect with the second primary switch pipe Q2, at the beginning of first
The anode of the drain electrode connection DC power supply 1 of grade switching tube Q1, the source electrode connection DC power supply 1 of the second primary switch pipe Q2 are born
End, the source electrode ground connection of the second primary switch pipe Q2, the first primary switch pipe Q1 are connect with the common point of the second primary switch pipe Q2
Resonance circuit 3；
Third primary switch pipe Q3 connects with the 4th primary switch pipe Q4, and the drain electrode of third primary switch pipe Q3 connects direct current
The anode of power supply 1, the negative terminal of the source electrode connection DC power supply 1 of the 4th primary switch pipe Q4, third primary switch pipe Q3 and the 4th
The common point of primary switch pipe Q4 connects resonance circuit 3；
5th primary switch pipe Q5 connects with the 6th primary switch pipe Q6, and the drain electrode of the 5th primary switch pipe Q5 connects direct current
The anode of power supply 1, the negative terminal of the source electrode connection DC power supply 1 of the 6th primary switch pipe Q6, the 5th primary switch pipe Q5 and the 6th
The common point of primary switch pipe Q6 connects resonance circuit 3；
Wherein, the first primary switch pipe Q1, the second primary switch pipe Q2, third primary switch pipe Q3, the 4th primary switch
The grid of pipe Q4, the 5th primary switch pipe Q5 and the 6th primary switch pipe Q6 are all connected with the control terminal of sampling control circuit 7.
More specifically, 7 frequency control the first primary switch pipe Q1 of sampling control circuit, the second primary switch pipe Q2,
Three primary switch pipe Q3, the 4th primary switch pipe Q4, the 5th primary switch pipe Q5 and the 6th primary switch pipe Q6, wherein first
Primary switch pipe Q1 and the second primary switch pipe Q2 complementary duty, third primary switch pipe Q3 work complementary with the 4th switching tube Q4
Make, the 5th primary switch pipe Q5 and the 6th switching tube Q6 complementary duty avoid intersecting, and then improve the change of sampling control circuit 7
The reliability of primary switch pipe in frequency control inverter circuit 2.In addition, same group of complementary primary switch pipe shutdown and open it
Between be equipped with dead time, play a part of in complementary primary switch pipe realize zero voltage switching.
Optionally, resonance circuit 3 includes at least three groups of resonance modules, and every group of resonance modules include resonant inductance and resonance electricity
Hold, one end of resonant capacitance connects the common point of two primary switch pipes in corresponding group, and resonant capacitance is connected through resonant inductance to be become
The primary side of transformer circuits 4.Wherein, resonant inductance includes separate inductor or integrated inductor.
It include three groups of primary switching circuits based on inverter circuit 2, therefore resonance circuit 3 includes three groups of resonance modules, such as Fig. 3 institute
Show, resonance circuit 3 includes three groups of resonance modules, and the first resonance modules include the first resonant inductance Lr1 and the first resonant capacitance
Cr1, the second resonance modules include the second resonant inductance Lr2 and the second resonant capacitance Cr2, and third resonance modules include third resonance
It is primary that one end of inductance Lr3 and third resonant capacitance Cr3, the first resonant capacitance Cr1 connect the first primary switch pipe Q1 and second
The common point of switching tube Q2, the other end of the first resonant capacitance Cr1 is through the first resonant inductance Lr1 connection transformer circuit 4；
The common point of one end connection the third primary switch pipe Q3 and the 4th primary switch pipe Q4 of second resonant capacitance Cr2,
The other end of second resonant capacitance Cr2 is through the second resonant inductance Lr2 connection transformer circuit 4；
One end of third resonant capacitance Cr3 connects the 6th grade of switching tube Q6 common point of level V switching tube Q5, third resonance
The other end of capacitor Cr3 is through third resonant inductance Lr3 connection transformer circuit 4.
Based on resonance circuit 3 is equipped in staggeredly controlled resonant converter, opening and shutting off for each primary switch pipe is reduced
The loss of generation reduces the volume for the controlled resonant converter that interlocks to improve the control frequency of staggeredly controlled resonant converter.
Optionally, transformer circuit 4 includes at least three transformers, the star-like interconnection of the primary side of transformer, transformation
The star-like interconnection of the primary side of device, the primary side of transformer connect resonant inductance, and the primary side of transformer connects rectification circuit
5。
Wherein, above-mentioned transformer includes separated transformer or integrated transformer, includes three groups of resonant modes based on resonance circuit 3
Block, therefore transformer circuit 4 includes three transformers, as shown in figure 3, transformer circuit 4 includes the first transformer T1, the second transformation
The primary side Same Name of Ends of device T2 and third transformer T2, the first transformer T1 connect the first resonant inductance Lr1, the first transformer T1
The primary side other end connect the second transformer T2 the primary side other end, the first transformer Tr1 primary side Same Name of Ends connection
Rectification circuit 5, the primary side other end of the first transformer T1 connect the primary side other end of the second transformer Tr2；
The primary side Same Name of Ends of second transformer T2 connects the second resonant inductance Lr2, and the primary side of the second transformer T2 is another
One end connects the primary side other end of third transformer T3, and the primary side Same Name of Ends of the first transformer Tr2 connects rectification circuit 5,
The primary side other end of the primary side other end connection third transformer Tr3 of second transformer T2；
The primary side Same Name of Ends of third transformer T3 connects third resonant inductance Lr3, and the primary side of third transformer T3 is same
Name end connects rectification circuit 5.
Optionally, rectification circuit 5 includes at least three groups of secondary switch circuits, and every group of secondary switch circuit includes two secondary
Switching tube, one secondary switch pipe and the common point of another secondary switch pipe connect the primary side of transformer in corresponding group, one
Another secondary switch pipe of secondary switch pipe series connection, one secondary switch pipe and another secondary switch pipe are separately connected the filtered electrical
Road 6.
Wherein, the type of above-mentioned secondary switch pipe can be field-effect tube, insulated gate bipolar transistor (IGBT), nitridation
The semiconductor power switch pipes such as gallium (GaN), and the type of the secondary switch pipe in the present embodiment is field-effect tube.
It include three transformers based on transformer circuit 4, therefore rectification circuit 5 includes three groups of secondary switch circuits, such as Fig. 3 institute
Showing, rectification circuit 5 includes first group of secondary switch circuit, second group of secondary switch circuit and third group secondary switch circuit, the
One group of secondary switch circuit includes first grade switching tube Q7 and second subprime switching tube Q8, second group of secondary switch circuit include
Third secondary switching tube Q9 and the 4th secondary switch pipe Q10, third group secondary switch circuit include the 5th secondary switch pipe Q11 and
6th secondary switch pipe Q12, first grade switching tube Q7 connect with second subprime switching tube Q8, first grade switching tube Q7 and
The common point of secondary stage switching tube Q8 connects the primary side Same Name of Ends of the first transformer T1, and the drain electrode of first grade switching tube Q7 connects
Connect the input terminal of filter circuit 6, another input terminal of the source electrode connection filter circuit 6 of second subprime switching tube Q8；
Third secondary switching tube Q9 connects with the 4th secondary switch pipe Q10, and third secondary switching tube Q9 and the 4th grade are opened
The common point for closing pipe Q10 connects the primary side Same Name of Ends of the second transformer T2, and the drain electrode of third secondary switching tube Q9 connects filtering
The input terminal of circuit 6, another input terminal of the source electrode connection filter circuit 6 of the 4th secondary switch pipe Q10；
5th secondary switch pipe Q11 connects with the 6th secondary switch pipe Q12, the 5th secondary switch pipe Q11 and the 6th grade
The primary side Same Name of Ends of the common point connection third transformer T3 of switching tube Q12, the drain electrode of the 5th secondary switch pipe Q11 connect filter
The input terminal of wave circuit 6, another input terminal of the source electrode connection filter circuit 6 of the 6th secondary switch pipe Q12；
Wherein, first grade switching tube Q7, second subprime switching tube Q8, third secondary switching tube Q9, the 4th secondary switch
The grid of pipe Q10, the 5th secondary switch pipe Q11 and the 6th secondary switch pipe Q12 are all connected with the control terminal of sampling control circuit 7.
According to last time it is found that secondary switch pipe in 7 delays time to control rectification circuit 5 of sampling control circuit, i.e. controlling of sampling
7 delays time to control of circuit, first grade switching tube Q7, second subprime switching tube Q8, third secondary switching tube Q9, the 4th secondary switch
Pipe Q10, the 5th secondary switch pipe Q11 and the 6th secondary switch pipe Q12, wherein first time grade switching tube Q7 is opened with second subprime
Close pipe Q8 complementary duty, third secondary switching tube Q9 and the 4th secondary switch pipe Q10 complementary duty, the 5th secondary switch pipe Q11
It with the 6th secondary switch pipe Q12 complementary duty, avoids intersecting, and then improves 7 delays time to control rectification circuit 5 of sampling control circuit
The reliability of interior primary switch pipe；In addition, being equipped in the shutdown of complementary secondary switch pipe and between opening dead time, rise
The effect of zero voltage switching is realized in complementary secondary switch pipe.
Filter circuit 6 includes filter capacitor C1, and one end of filter capacitor C1 connects the drain electrode of the 5th secondary switch pipe Q11,
The other end of filter capacitor C1 connects the source electrode of the 6th secondary switch pipe Q12, the other end ground connection of filter capacitor C1, filter capacitor
The both ends of C1 are connected in parallel on load RL.
In addition, filter circuit 6 can also include filter capacitor and filter inductance, details are not described herein again.
As shown in figure 4, the primary current Ip1 of first transformer T1 of the detection of sampling control circuit 7, the second transformer T2's is first
Grade electric current Ip2, the secondary current Is1 of the primary current Ip3 or the first transformer T1 of third transformer T3, the second transformer T2
The secondary current Is3 of secondary current Is2, third transformer T3, as shown in figure 4, the waveform table of primary current Ip1, Ip2, Ip3
Bright, these primary switch pipes are all with identical switching frequency operation, and the duty ratio of each primary switch pipe is each about 50%,
One primary switch pipe Q1, third primary switch pipe Q3, the 5th primary switch pipe Q5 interlock 120 ° and work, the second primary switch pipe
Q2, the 4th primary switch pipe Q4, the 6th primary switch pipe Q6 interlock 120 ° and work.
When staggeredly controlled resonant converter works in the case where controlling no delay time, as shown in figure 5, secondary current Is1,
The waveform of Is2, Is3 show these secondary switch pipes all with switching frequency operation identical with primary switch pipe, and each secondary
The duty ratio of switching tube is each about 50%, first grade switching tube Q7, third secondary switching tube Q9, the 5th secondary switch pipe Q11
Staggeredly 120 ° of work, second subprime switching tube Q8, the 4th secondary switch pipe Q10, the 6th secondary switch pipe Q12 interlock 120 ° of works
Make.
As described above, input voltage vin or filtered electrical of the sampling control circuit 7 according to the inverter circuit 2 sampled
The output voltage Vo or setting voltage Vref on road 6, determine delay time.
As shown in Fig. 6, Fig. 7 and Fig. 8, the delay time is in secondary switch pipe relative in secondary current Is1, Is2, Is3
Zero crossing carry out delay and open and time delayed turn-off；Or the delay time secondary switch pipe relative to secondary current Is1, Is2,
Zero crossing in Is3 only carries out time delayed turn-off.Specifically, the maximum value of delay time is about TS/4, wherein TS is switch week
Phase, maximum delay time are also limited to control frequency and load RL, and control frequency is smaller, maximum smaller up to delay time.It is right
It is gradually decreased in higher input voltage vin or lower output voltage Vo, the delay time.Therefore, delay time control is logical
Often do not used under middle and high input voltage vin or nominal and low output voltage Vo.
By taking the first transformer T1 as an example, in the case where the magnetizing inductance of the first transformer T1 primary side is relatively high, encourage
Magnetoelectricity stream Im can ignore the contribution of primary current Ip1, Is1=n*Ip1, n indicate the first transformer T1 primary side and just
The ratio between the number of turns of grade side；When the zero crossing in primary current Ip1 and secondary current Is1 occurs simultaneously, delay time is controlled not
It will receive the influence of the primary current Ip1 detected or secondary current Is1 zero crossing；
When exciting current Im is not-time relative to can not ignore for main resonance electric current, primary current Ip1 and secondary current Is1
In zero crossing phase shift relative to each other, Is1=n (Ip1-Im) at this time, as Ip1=Im, zero passage occurs for secondary current Is1,
But zero passage does not occur for primary current Ip1, and zero current detector 76 detects the zero passage of secondary current Is1 or/and primary current Ip1
Point, the delay time that delay controller 75 is obtained according to input voltage vin or output voltage Vo, in conjunction with primary current Ip1 or secondary
The zero crossing of grade electric current Is1 obtains the control pwm signal of rectification circuit 4 in turn；In this case, zero current detector 76 detects
Secondary current Is1 is optimal case.
When staggeredly controlled resonant converter works in the case where controlling no delay time, the secondary electrical of the first transformer T1
Pressure is Vout, and the turn ratio of primary side and primary side based on the first transformer T1 is n, therefore the primary voltage of the first transformer T1
The voltage of nVout, the first resonant inductance Lr1 are according to the input voltage vin put of first group of primary switching circuit and the first resonance electricity
The difference held between the voltage VCr1 of Cr1, the primary voltage nVout of the first transformer T1 obtains, therefore, in secondary current Is1
Zero passage is backwards in primary current Ip1 zero passage reversed time interval, and the voltage of the first resonant inductance Lr1 is Vinput-VCr1-
NVout, when secondary current Is1 zero passage is reversed, the secondary voltage Vout of the first transformer T1 is reversed, thus the first transformer T1
Primary voltage nVout it is reversed, i.e. the primary voltage nVout of the first transformer T1 is positive, the voltage of the first resonant inductance Lr1
Vinput-VCr1-nVout is smaller value.
As shown in figure 4, when delay controller 75 is secondary to first grade switching tube Q7, second subprime switching tube Q8, third
Switching tube Q9, the 4th secondary switch pipe Q10, the 5th secondary switch pipe Q11, the 6th secondary switch pipe Q12 apply delay time control
When processed, when secondary current Is1 zero passage is reversed, then the secondary voltage Vout of the first transformer T1 still cannot be reversed, therefore first becomes
The primary voltage nVout of depressor T1 can not be reversed, i.e., is persistently negative in the primary voltage nVout delays time to control time, first is humorous
The voltage of vibration inductance Lr1 should be Vinput-VCr1+nVout, the value ratio of Vinput-VCr1+nVout within delay time
The value of Vinput-VCr1-nVout is bigger, the first resonant inductance Lr1 storage energy ratio is not added bigger when delays time to control, increases
Resonance circuit gross energy increases output voltage Vo.
Second transformer T2 and third transformer T3 are identical as above-mentioned principle, and details are not described herein again.
Staggeredly controlled resonant converter uses frequency conversion based on sampling control circuit 7 under identical input voltage and control frequency
Control adjusts the output voltage of filter circuit 6 with the combination of delays time to control, since delays time to control increases the energy in resonance circuit 3
Amount, make staggeredly controlled resonant converter have boosting characteristic, i.e., staggeredly the output voltage range of controlled resonant converter broadens, to solve
Staggeredly the output voltage range of controlled resonant converter is narrow, and controls the big problem of frequency range；Meanwhile reducing driving and magnetism member
Part loss, improves transfer efficiency.
Embodiment two
The difference between this embodiment and the first embodiment lies in the specific connection relationship in transformer circuit 4, equally, the present embodiment
Middle transformer circuit 4 includes at least three transformers, and the primary side triangular form of transformer interconnects, the primary side three of transformer
Angle-style interconnects.
By taking transformer circuit 4 includes three transformers as an example, as shown in figure 9, transformer circuit 4 includes the first transformer
The primary side Same Name of Ends of T1, the second transformer T2 and third transformer T3, the first transformer T1 connect the first resonant inductance Lr1,
The primary side other end of first transformer T1 connects the primary side Same Name of Ends of the second transformer T2, the primary side of the second transformer T2
Same Name of Ends connects the primary side of the primary side other end connection third transformer T3 of the second resonant inductance Lr2, the second transformer T2
Same Name of Ends, the primary side Same Name of Ends of third transformer T3 connect third resonant inductance Lr3, the other end connection of third transformer T3
The primary side Same Name of Ends of first transformer T1, the primary side Same Name of Ends of the first transformer T1 connect first grade switching tube Q7 and the
The common point of secondary stage switching tube, the primary side that the primary side other end of the first transformer T1 connects the second transformer T2 are of the same name
The primary side Same Name of Ends at end, the second transformer T2 connects third secondary switching tube Q9 and the 4th secondary switch pipe Q10, the second transformation
The secondary Same Name of Ends of the primary side other end connection third transformer T3 of device T2, the primary side Same Name of Ends connection of third transformer T3
The primary side other end of 5th secondary switch pipe Q11 and the 6th secondary switch pipe Q12, third transformer T3 connect the first transformer
The primary side Same Name of Ends of T1.
Transformer in the working principle Yu embodiment one of the transformer circuit 4 of the present embodiment and staggeredly controlled resonant converter
The working principle of circuit 4 and staggeredly controlled resonant converter is similar, and details are not described herein again, the difference is that as shown in figure 9, when delay control
Device 75 processed to first grade switching tube Q7, second subprime switching tube Q8, third secondary switching tube Q9, the 4th secondary switch pipe Q10,
When 5th secondary switch pipe Q11, the 6th secondary switch pipe Q12 apply delay time control, when secondary current Is1 zero passage is reversed,
Then the secondary voltage Vout of the first transformer T1 is zero in delay time, therefore the primary voltage nVout of the first transformer T1 exists
It is zero in delay time, but the voltage of the first resonant inductance Lr1 should be Vinput-VCr1+nVout, in delay time still
Value than the voltage Vinput-VCr1-nVout of the first resonant inductance Lr1 when not increasing delays time to control is bigger, makes the first resonance
Inductance Lr1 storage energy ratio is not added bigger when delays time to control, increases resonance circuit gross energy, increases output voltage Vo, and same
The output voltage range that sample solves controlled resonant converter is narrow, and controls the big problem of frequency range.
Embodiment three
The difference between the present embodiment and the second embodiment lies in that the specific connection relationship in resonance circuit 3, equally, in the present embodiment
Resonance circuit 3 includes at least three groups of resonance modules, and every group of resonance modules include resonant inductance and resonant capacitance, and resonant capacitance is in parallel
In the primary side of transformer circuit 4, one end of resonant inductance is connected to the first primary switch pipe and the second primary in corresponding group
The common point of switching tube, the primary side of the other end connection transformer circuit 4 of resonant inductance.
Resonance circuit 3 in the working principle Yu embodiment one of the resonance circuit 3 of the present embodiment and staggeredly controlled resonant converter
And the working principle of staggeredly controlled resonant converter is identical, details are not described herein again, and equally solves the output electricity of controlled resonant converter
Narrow range is pressed, and controls the big problem of frequency range.
Example IV
The present invention also provides a kind of control methods of staggeredly controlled resonant converter, as shown in Figure 10, comprising:
11, the output voltage of sampling control circuit wave filtering circuit, and to frequency control after output voltage progress operation
Inverter circuit；
12, the primary current or/and secondary current of sampling control circuit detection transformer circuit, sampling control circuit are also adopted
The input voltage of sample inverter circuit；
13, when sampling control circuit obtains delay according to the input voltage or output voltage or setting voltage Vref that sample
Between；
14, sampling control circuit combines according to the primary current or secondary current zero cross signal for detecting transformer circuit and prolongs
The slow time carries out delays time to control to rectification circuit.
The control method of above-mentioned staggeredly controlled resonant converter, as shown in Figure 10, the specific steps are as follows:
Firstly, the output voltage of 7 wave filtering circuit 6 of sampling control circuit, and operation is carried out to the output voltage of sampling
After obtain pwm signal, according to the primary switch pipe in pwm signal frequency control inverter circuit 2；
Secondly, sampling control circuit 7 also samples the input voltage of inverter circuit 2, and the primary of detection transformer circuit 4
Electric current or/and secondary current；
Finally, output voltage or setting of the sampling control circuit 7 according to the input voltage or filter circuit 6 of inverter circuit 2
The delay time that voltage Vref is obtained, in conjunction with detecting the zero crossing of primary current or secondary current to time in rectification circuit 5
Grade switching tube carries out delay time control.
The control method of above-mentioned staggeredly controlled resonant converter, uses frequency control and delays time to control by sampling control circuit 7
Combination adjust output voltage, since delays time to control increases the energy in resonance circuit 3, make staggeredly controlled resonant converter have and rise
Characteristic is pressed, makes staggeredly controlled resonant converter that control frequency range be greatly reduced to realize wide input voltage range or/and wide defeated
Voltage range out so that the output voltage range for solving staggeredly controlled resonant converter is narrow, and controls the big problem of frequency range；Together
When, driving and magnetic element loss are reduced, transfer efficiency is improved.
In order to realize zero voltage switching in same group of primary switch pipe and secondary switch pipe, same group in inverter circuit 2
Dead time is equipped between the open and close of primary switch pipe, unlatching and pass in rectification circuit 5 with group secondary switch pipe
Dead time is equipped between closing.
It is suitable for the star-like interconnection of primary, secondary triangle is connected with each other.
The present disclosure additionally applies for the interconnection of primary triangle, secondary star-like interconnection.
The above embodiment is only the preferred embodiment of the present invention, and the scope of protection of the present invention is not limited thereto,
The variation and replacement for any unsubstantiality that those skilled in the art is done on the basis of the present invention belong to institute of the present invention
Claimed range.
Claims (15)
- The controlled resonant converter 1. one kind is interlocked, including DC power supply, inverter circuit, resonance circuit, the transformer electricity being sequentially connected electrically Road, rectification circuit and filter circuit, which is characterized in that it further include sampling control circuit, the control terminal of the sampling control circuit It is separately connected the control terminal of the inverter circuit and the control terminal of the rectification circuit；The sampling end of the sampling control circuit point The input terminal of the inverter circuit and the output end of the filter circuit are not connected；Distinguish the test side of the sampling control circuit Connect the primary side or/and primary side of the transformer circuit.
- 2. staggeredly controlled resonant converter according to claim 1, which is characterized in that the sampling control circuit is microcontroller Device.
- 3. staggeredly controlled resonant converter according to claim 1, which is characterized in that the sampling control circuit includes successively electric Circuit, error amplifier, loop compensator, voltage controlled oscillator, delay controller and zero current detector are calibrated in the sampling of connection； The sampling end of the sampling calibration circuit is separately connected the output end of the input terminal and the filter circuit of the inverter circuit；Institute The control terminal for stating inverter circuit connects the voltage controlled oscillator；The delay controller be separately connected sampling calibration circuit and The zero current detector；The control terminal of the rectification circuit connects the delay controller, the inspection of the zero current detector Survey primary side or/and primary side that end is separately connected the transformer circuit.
- 4. staggeredly controlled resonant converter according to claim 1 or 2 or 3, which is characterized in that the inverter circuit includes at least Three groups of primary switching circuits, every group of primary switching circuit include two primary switch pipes；Primary switch pipe described in one connects institute The anode of DC power supply is stated, primary switch pipe described in one also connects the negative of the DC power supply through another primary switch pipe It holds, primary switch pipe described in one connects the resonance circuit with the common point of another primary switch pipe.
- 5. staggeredly controlled resonant converter according to claim 4, which is characterized in that the resonance circuit includes at least three groups humorous Vibration module, every group of resonance modules include resonant inductance and resonant capacitance；One end of the resonant capacitance connects in corresponding group two The common point of the primary switch pipe, the resonant capacitance connect the primary side of the transformer circuit through the resonant inductance.
- 6. it is according to claim 5 staggeredly controlled resonant converter, which is characterized in that the resonant inductance include separate inductor or Integrated inductor.
- 7. staggeredly controlled resonant converter according to claim 4, which is characterized in that the resonance circuit includes at least three groups humorous Vibration module, every group of resonance modules include resonant inductance and resonant capacitance；The resonant capacitance is connected in parallel on the transformer circuit Primary side, one end of the resonant inductance connect the common point of two primary switch pipes in corresponding group, the resonant inductance The other end connect the primary side of the transformer circuit.
- 8. staggeredly controlled resonant converter according to claim 5, which is characterized in that the transformer circuit includes at least three The primary side of transformer, the transformer is star-like or triangular form interconnects, and the primary side of the transformer is star-like or triangular form It interconnects, the primary side of the transformer connects the resonant inductance, and the primary side of the transformer connects the rectified current Road.
- 9. it is according to claim 8 staggeredly controlled resonant converter, which is characterized in that the transformer include separated transformer or Integrated transformer.
- 10. staggeredly controlled resonant converter according to claim 8, which is characterized in that the rectification circuit includes at least three groups Secondary switch circuit, every group of secondary switch circuit include two secondary switch pipes；Secondary switch pipe described in one and another described The common point of secondary switch pipe connects the primary side of transformer described in corresponding group, another institute of secondary switch pipe series connection described in one Secondary switch pipe is stated, secondary switch pipe described in one and another secondary switch pipe are separately connected the filter circuit.
- 11. staggeredly controlled resonant converter according to claim 7, which is characterized in that the transformer circuit includes at least three The primary side of a transformer, the transformer is star-like or triangular form interconnects, and the primary side of the transformer is star-like or triangle Type interconnects, and the primary side of the transformer connects the resonant inductance, and the primary side of the transformer connects the rectification Circuit.
- 12. staggeredly controlled resonant converter according to claim 11, which is characterized in that the rectification circuit includes at least three groups Secondary switch circuit, every group of secondary switch circuit include two secondary switch pipes, secondary switch pipe described in one and another described The common point of secondary switch pipe connects the primary side of transformer described in corresponding group, another institute of secondary switch pipe series connection described in one Secondary switch pipe is stated, secondary switch pipe described in one and another secondary switch pipe are separately connected the filter circuit.
- 13. a kind of control method for realizing the controlled resonant converter that interlocks described in claim 1 to 12 Arbitrary Term, which is characterized in that The control method, comprising:The sampling control circuit samples the output voltage of the filter circuit, and to frequency conversion after output voltage progress operation Control the inverter circuit；The sampling control circuit detects the primary current or/and secondary current of the transformer circuit, the controlling of sampling electricity Road also samples the input voltage of the inverter circuit；The sampling control circuit is obtained according to the input voltage or the output voltage or setting voltage Vref that sample Delay time；The sampling control circuit is combined according to the primary current or secondary current zero cross signal for detecting the transformer circuit Delay time carries out delays time to control to the rectification circuit.
- 14. the control method of staggeredly controlled resonant converter according to claim 13, which is characterized in that the controlling of sampling electricity Road obtains delay time according to the input voltage or the output voltage or setting voltage Vref that sample, comprising:The sampling control circuit passes through according to the input voltage or the output voltage or setting voltage Vref that sample It calculates or inquiry surveys obtained vector table and obtains delay time.
- 15. the control method for the controlled resonant converter that interlocks described in 3 or 14 according to claim 1, which is characterized in that in the inversion It is equipped with dead time between the open and close of group primary switch pipe in circuit, with group secondary switch in the rectification circuit Dead time is equipped between the open and close of pipe.
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| CN201811093249.6A CN109194138A (en) | 2018-09-19 | 2018-09-19 | A kind of controlled resonant converter and control method of interlocking |
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