CN104811019A - Self-adaptive novel soft switching full-bridge circuit driving method and full-bridge driving circuit - Google Patents
Self-adaptive novel soft switching full-bridge circuit driving method and full-bridge driving circuit Download PDFInfo
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- CN104811019A CN104811019A CN201510187225.7A CN201510187225A CN104811019A CN 104811019 A CN104811019 A CN 104811019A CN 201510187225 A CN201510187225 A CN 201510187225A CN 104811019 A CN104811019 A CN 104811019A
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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
- H02M1/00—Details of apparatus for conversion
- H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
- H02M1/088—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices
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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
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/53—Conversion of dc power input into ac power output without possibility of reversal 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
- H02M7/537—Conversion of dc power input into ac power output without possibility of reversal 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, e.g. single switched pulse inverters
- H02M7/5387—Conversion of dc power input into ac power output without possibility of reversal 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, e.g. single switched pulse inverters in a bridge configuration
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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
Abstract
The invention discloses a self-adaptive novel soft switching full-bridge circuit driving method and a full-bridge driving circuit. The full-bridge driving circuit comprises a full-bridge circuit, wherein the full-bridge circuit is composed of a first switching device, a second switching device, a third switching device and a fourth switching device. A first external control signal is connected with the third control end of the third switching device, and a second external control signal is connected with the fourth control end of the fourth switching device; a first node is arranged on a connecting circuit located between the first switching device and the third switching device, and a second node is arranged on a connecting circuit located between the second switching device and the fourth switching device; the first control end of the first switching device is connected with the second node, the second control end of the second switching device is connected with the first node, and the first node is connected with the second node through a load loop with the inductance feature. The self-adaptive novel soft switching full-bridge circuit driving method and the full-bridge driving circuit have the advantages that the circuit is simple, the zero-voltage and zero-current soft switching function can be conveniently fulfilled, and the circuit layout is flexible.
Description
Technical field
the present invention relates to soft switch full bridge circuit technical field, especially relate to a kind of self adaptation Novel Soft Switching full-bridge circuit driving method and full bridge driving circuit.
Background technology
In existing technology, full bridge driving circuit has a variety of, but all there is a lot of problems.That accessory power supply bootstrapping level shift drives full-bridge circuit as shown in Figure 1,4 brachium pontis of the full-bridge circuit of this structure all need directly to connect Drive and Control Circuit, especially upper arm also needs the drive IC that high-voltage level is shifted, also need independently bootstrap power supply simultaneously, circuit is complicated, and cost is high, and noise is large, loss is high, and circuit layout is complicated.Simultaneously because higher voltage will be born in drive IC inside, to the performance of drive IC and the requirement of technique higher, reliability may be affected, and takies volume and space, makes troubles to the typesetting of circuit and installation.
Refer to Fig. 2, that transformer comparatively conventional at present drives full-bridge circuit shown in Fig. 2, the transformer of this structure drives full-bridge circuit, there is transformer cost high, and due to the reason of transformer isolation direct current, the unipolar pulse of primary side can produce level shift (problem of zero shifting) after transformer isolation, cause the serious imbalance of 4 arm driving voltages, and depart from 50% and aggravate along with duty ratio, need to increase more complicated displacement or clamp circuit solves this unbalanced problem.Also have between each winding of this circuit and there is parasitic contribution parameter, affect serviceability, and this circuit dead band is difficult to adjustment, need complicated treatment circuit to complete, cost is high, and effect is bad, and the difficulty realizing Sofe Switch increases.Because volume of transformer is large, single phase transformer drives 4 bridges, and circuit layout is very difficult, is unfavorable for the miniaturization of product, simplicity, high reliability and low noise.
Summary of the invention
In order to overcome the problems referred to above, to society, the present invention provides that a kind of structure is simple, loss is low, reliability is high, noise is little, the higher operational frequency that can work and easily realize four bridge legs no-voltage simultaneously or realize self adaptation Novel Soft Switching full-bridge circuit driving method and the full bridge driving circuit of four bridge legs no-voltage and zero current (close to zero current) Sofe Switch simultaneously.
A kind of technical scheme of the present invention is: provide a kind of self adaptation Novel Soft Switching full-bridge circuit driving method, comprise the first switching device, second switch device, the full-bridge circuit that 3rd switching device and the 4th switching device are formed, described first switching device and described 3rd switching device series connection, described second switch device is connected with described 4th switching device, described first switching device is connected with one end of power supply respectively with described second switch device, described 3rd switching device is connected with the other end of power supply respectively with described 4th switching device, drive in the process of load using described full-bridge circuit, described full-bridge circuit carries out work by the following course of work:
(1) after, having powered on, first external control signal controls described 3rd switch device conductive, form the first control signal in connection line between described first switching device and described 3rd switching device and control described second switch break-over of device, described second switch device, the load circuit with inductance characteristic and described 3rd switch form performance loop;
(2), described first external control signal controls described 3rd switching device and disconnects, and forms the second control signal and control described second switch device to disconnect in the connection line between described first switching device and described 3rd switching device;
After described second switch device disconnects, form the 3rd control signal in the connection line between described second switch device and described 4th switching device, the 3rd control signal controls described first switch conduction;
(3), after the first dead band, the second external control signal controls described 4th switch device conductive; After described first switching device and described 4th switch device conductive, electric current described first switching device, described in have between the load circuit of inductance characteristic and described 4th switch and form performance loop;
(4), described second external control signal controls described 4th switching device disconnection, form the 4th control signal in connection line between described second switch device and described 4th switching device and control described first switching device and disconnect, form the 5th control signal in connection line between described first switching device and described 3rd switching device, described 5th control signal controls described second switch break-over of device;
(5), after the second dead band, it is open-minded that described first external control signal controls described 3rd switching device again, after described second switch device and described 3rd switching device are opened again, electric current described second switch device, described in have inductance characteristic load circuit and described 3rd switch formed performance loop;
(6), (2) is repeated to (5) step, full-bridge circuit periodic duty.
As improvement of the present invention, described first external control signal and described second external control signal are containing described first dead band, described second dead band and one of complementation group of drive singal.
As improvement of the present invention, the described load circuit with inductance characteristic comprises load, and to be connected with described load and there is the circuit of inductance characteristic, the described circuit with inductance characteristic for described Load transportation energy, and make described full-bridge circuit be operated in described in there is the perceptual section of the circuit of inductance characteristic.
Another kind of technical scheme of the present invention is: provide a kind of self adaptation Novel Soft Switching full bridge driving circuit, comprise the first switching device, second switch device, the full-bridge circuit that 3rd switching device and the 4th switching device are formed, described first switching device and described 3rd switching device series connection, described second switch device is connected with described 4th switching device, described first switching device is connected with one end of power supply respectively with described second switch device, described 3rd switching device is connected with the other end of power supply respectively with described 4th switching device, also comprise the load circuit with inductance characteristic, first external control signal is communicated with the 3rd control end of described 3rd switching device, second external control signal is communicated with the 4th control end of described 4th switching device, connection line between described first switching device and described 3rd switching device is provided with first node, connection line between described second switch device and described 4th switching device is provided with Section Point, first control end of described first switching device is connected with described Section Point, second control end of described second switch device is connected with described first node, and the load circuit described in described first node passes through with inductance characteristic is connected with described Section Point.
As improvement of the present invention, the described load circuit with inductance characteristic comprises load, and to be connected with described load and there is the circuit of inductance characteristic, the described circuit with inductance characteristic for described Load transportation energy, and make described full-bridge circuit be operated in described in there is the perceptual section of the circuit of inductance characteristic; The described circuit with inductance characteristic is lc circuit or inductance.
As improvement of the present invention, described in there is inductance characteristic load circuit comprise the load with inductance characteristic.
As improvement of the present invention, also comprise the first clamp circuit, the two ends of described first clamp circuit are connected with one end of power supply and described Section Point respectively, and the first clamp output of described first clamp circuit is connected with described first control end.
As improvement of the present invention, also comprise the second clamp circuit, the two ends of described second clamp circuit are connected with one end of power supply and described first node respectively, and the second clamp output of described second clamp circuit is connected with described second control end.
As improvement of the present invention, also comprise the first inverter circuit and the 3rd clamp circuit with positive and negative clamp function, described 3rd clamp circuit is connected with described Section Point and described first node respectively, and the 3rd clamp output of described 3rd clamp circuit is connected with described first control end by described first inverter circuit.
As improvement of the present invention, also comprise the second inverter circuit and the 4th clamp circuit with positive and negative clamp function, described 4th clamp circuit is respectively with described Section Point and described first node be connected with one end of power supply by starting resistance, and the 4th clamp output of described 4th clamp circuit is connected with described second control end by described second inverter circuit.
The present invention is owing to being connected the first control end of the first switching device with Section Point, second control end of second switch device is connected with first node, and the first external control signal, the second external control signal control the 3rd switching device, being turned on or off of the 4th switching device respectively; In the process driving load, when the 3rd switching device disconnects, cause second switch device disconnect and at Section Point formation control signal controlling first switch device conductive, when the 4th switching device disconnects, cause the first switching device to disconnect and at first node formation control signal controlling second switch break-over of device, thus achieve and intersect the function of self-excited driving; And can expand full bridge driving circuit, full bridge driving circuit is made to be operated in different power supply voltage ranges by using clamp circuit, when needs are operated in high pressure, also need to adopt the 3rd clamp circuit, the 4th clamp circuit, the first inverter circuit and second inverter circuit with positive and negative clamp function, and described first electronic switch adapted to it, described second electronic switch, described 3rd electronic switch, described 4th electronic switch.Full bridge driving circuit of the present invention has simple circuit, realizes (no-voltage, zero current) Sofe Switch function very easily, switching speed is fast, loss is little, noise is low, reliability is high, can work at higher frequencies, reduce volume, provide relatively high power density, circuit layout flexibly and the advantage such as application is convenient.
Accompanying drawing explanation
Fig. 1 is the circuit diagram that in prior art, accessory power supply bootstrapping level shift drives full-bridge circuit.
Fig. 2 is the circuit diagram that in prior art, transformer drives full-bridge circuit.
Fig. 3 is the principle frame structure schematic diagram of a kind of embodiment of the present invention.
Fig. 4 is electrical block diagram embodiment illustrated in fig. 3.
Fig. 5 is the work wave schematic diagram of Fig. 4.
Fig. 6 is the principle frame structure schematic diagram of another kind of embodiment of the present invention.
Fig. 7 is the principle frame structure schematic diagram of the third embodiment of the present invention.
Fig. 8 is the principle frame structure schematic diagram of the 4th kind of embodiment of the present invention.
Fig. 9 is a kind of electrical block diagram embodiment illustrated in fig. 8.
Figure 10 is another kind of electrical block diagram embodiment illustrated in fig. 8.
Figure 11 is the principle frame structure schematic diagram of the 5th kind of embodiment of the present invention.
Figure 12 is electrical block diagram embodiment illustrated in fig. 10.
Wherein: 1. the first switching device; 2. second switch device; 3. the 3rd switching device; 4. the 4th switching device; 5. there is the load circuit of inductance characteristic; 51.LC circuit; 52. loads; 53. loads with inductance characteristic; 7. the first clamp circuit; 8. the second clamp circuit; 9. the 3rd clamp circuit; 10. the 4th clamp circuit; 11. first inverter circuits; 111. first accessory power supplys; 112. first inverters; 12. second inverter circuits; 121. second accessory power supplys; 122. second inverters.
Embodiment
In describing the invention, it is to be appreciated that term " first ", " second " only for describing object, and can not be interpreted as instruction or hint relative importance.Term " installation ", " connection ", " being connected " should be interpreted broadly, and such as, can be fixedly connected with, and also can be that dismounting connects, or connect integratedly; Can be mechanical connection, also can be electrical connection; Can be directly be connected, also can be indirectly be connected by intermediary, can be the connection of two element internals.For the ordinary skill in the art, concrete condition above-mentioned term can be understood at concrete meaning of the present invention.
The invention provides a kind of self adaptation Novel Soft Switching full-bridge circuit driving method, a kind of self adaptation Novel Soft Switching full-bridge circuit driving method, comprise the first switching device, second switch device, the full-bridge circuit that 3rd switching device and the 4th switching device are formed, described first switching device and described 3rd switching device series connection, described second switch device is connected with described 4th switching device, described first switching device is connected with one end of power supply respectively with described second switch device, described 3rd switching device is connected with the other end of power supply respectively with described 4th switching device, drive in the process of load using described full-bridge circuit, described full-bridge circuit carries out work by the following course of work:
(1) after, having powered on, first external control signal controls described 3rd switch device conductive, form the first control signal in connection line between described first switching device and described 3rd switching device and control described second switch break-over of device, described second switch device, the load circuit with inductance characteristic and described 3rd switch form performance loop;
(2), described first external control signal controls described 3rd switching device and disconnects, and forms the second control signal and control described second switch device to disconnect in the connection line between described first switching device and described 3rd switching device;
After described second switch device disconnects, form the 3rd control signal in the connection line between described second switch device and described 4th switching device, the 3rd control signal controls described first switch conduction;
(3), after the first dead band, the second external control signal controls described 4th switch device conductive; After described first switching device and described 4th switch device conductive, electric current described first switching device, described in have between the load circuit of inductance characteristic and described 4th switch and form performance loop;
(4), described second external control signal controls described 4th switching device disconnection, form the 4th control signal in connection line between described second switch device and described 4th switching device and control described first switching device and disconnect, and forming the 5th control signal in connection line between described first switching device and described 3rd switching device, described 5th control signal controls described second switch break-over of device;
(5), after the second dead band, it is open-minded that described first external control signal controls described 3rd switching device again, after described second switch device and described 3rd switching device are opened again, electric current described second switch device, described in have inductance characteristic load circuit and described 3rd switch formed performance loop;
(6), (2) is repeated to (5) step, full-bridge circuit periodic duty.
In this method, described first external control signal and described second external control signal are containing described first dead band, described second dead band and one group of drive singal of polarity complementation.
In this method, the described load circuit with inductance characteristic comprises load, and to be connected with described load and there is the circuit of inductance characteristic, the described circuit with inductance characteristic for described Load transportation energy, and make described full-bridge circuit be operated in described in there is the perceptual section of the circuit of inductance characteristic.The described circuit with inductance characteristic is lc circuit or inductance, and described load is the load without inductance characteristic, as resistance, capacitive load, negative resistive load, rectifier bridge or rectifier etc.
In this method, the described load circuit with inductance characteristic comprises the load with inductance characteristic, namely when described load has inductance characteristic (leakage inductance), there is described in the so this load with inductance characteristic just can replace the inductance in the circuit of inductance characteristic, that is can replace the inductance in lc circuit.
When the described load circuit with inductance characteristic comprises the load with inductance characteristic, the inductance characteristic had that is in the load circuit of inductance characteristic is produced by the described load with inductance characteristic.At this moment, can also according to actual needs, have in the load circuit of inductance characteristic described, the load described in giving with inductance characteristic connects or does not connect inductance (also can be the circuit containing inductance).The described load with inductance characteristic is transformer, the coil of induction heating, wireless charging transmitting coil, loud speaker, other electromagnetic emission coil, load resistance or rectifier etc.; here no matter described in there is inductance characteristic load be which type of structure, as long as it has the protection range that inductance characteristic is all this patent.What needs further illustrated is, when use the coil of induction heating or wireless charging transmitting coil as described there is the load of inductance characteristic time, in order to arrive best working effect, the described load circuit with inductance characteristic also comprises electric capacity, the loop that described electric capacity and the described load in series with inductance characteristic are formed.
In this method, described first external control signal and described second external control signal control described 3rd switching device and described 4th switch device conductive respectively by high level signal, and described first external control signal and described second external control signal control described 3rd switching device and described 4th switching device disconnection respectively by low level signal.
In this method, described 3rd switching device and described 4th switch device conductive can also be controlled by low level signal, and control described 3rd switching device and described 4th switching device disconnection by high level signal.
In this method, described first control signal, described 3rd control signal and described 5th control signal can be low level signals, then described second control signal and described 4th control signal can be high level signals, conducting when so described first switching device and described second switch device receive low level signal, and disconnect when described first switching device and described second switch device receive high level signal.
In this method, described first control signal, described 3rd control signal and described 5th control signal can also be high level signals, then described second control signal and described 4th control signal can be low level signals, conducting when so described first switching device and described second switch device receive high level signal, and disconnect when described first switching device and described second switch device receive low ordinary mail.
In this method, one end of power supply is negative or positive electrode, then the other end of power supply is negative pole or positive pole.Described 3rd switching device and described 4th switching device are PMOS or NMOS tube, then described second switch device and described first switching device are NMOS tube or PMOS.Described first switching device, described second switch device, described 3rd switching device and described 4th switching device can be that high speed thyristor, turn-off thyristor, power transistor, field-effect transistor are or/and gated transistor.
Refer to Fig. 3, the functional-block diagram of a kind of a kind of embodiment of self adaptation Novel Soft Switching full bridge driving circuit that what Fig. 3 disclosed is, comprise the first switching device 1, second switch device 2, the full-bridge circuit that 3rd switching device 3 and the 4th switching device 4 are formed, described first switching device 1 and described 3rd switching device 3 are connected, described second switch device 2 is connected with described 4th switching device 4, first switching device 1 is connected with one end of power supply respectively with described second switch device 2, described 3rd switching device 3 is connected with the other end of power supply respectively with described 4th switching device 4.
In the present embodiment, also comprise the external control signal DR3 of load circuit 5, first with inductance characteristic and be communicated with the 3rd control end of described 3rd switching device 3, the second external control signal DR4 is communicated with the 4th control end of described 4th switching device 4; Connection line between described first switching device 1 and described 3rd switching device 3 is provided with first node M, connection line between described second switch device 2 and described 4th switching device 4 is provided with Section Point N, first control end of described first switching device 1 is connected with described Section Point N, second control end of described second switch device 2 is connected with described first node M, and the load circuit 5 described in described first node M passes through with inductance characteristic is connected with described Section Point N.
In the present embodiment, described first external control signal DR3 and described second external control signal DR4 is containing described first dead band, described second dead band and one of complementation group of drive singal.
In the present embodiment, the described load circuit 5 with inductance characteristic comprises load 52, and to be connected with described load 52 and there is the circuit of inductance characteristic, the described circuit with inductance characteristic for described load 52 transmitting energy, and make described full-bridge circuit be operated in described in there is the perceptual section of the circuit of inductance characteristic.The described circuit with inductance characteristic is lc circuit 51, and described lc circuit 51 can also replace with inductance, and described inductance is the distributed inductance of outer coilloading or circuit.Described load 52 is the loads 52 without inductance characteristic, as resistance, capacitive load, negative resistive load, rectifier bridge or rectifier etc.
In the present embodiment, the described load circuit 5 with inductance characteristic comprises the load with inductance characteristic, namely when described load 52 has inductance characteristic (leakage inductance), there is described in the so this load with inductance characteristic just can replace the inductance in the circuit of inductance characteristic, that is the inductance in described lc circuit 51 can be replaced, the load circuit 5 namely with inductance characteristic directly can not use inductance, and its functional-block diagram refers to Fig. 6.
In figure 6, described in there is inductance characteristic load circuit 5 comprise the load 53 with inductance characteristic, the inductance characteristic had that is in the load circuit 5 of inductance characteristic is produced by the described load 53 with inductance characteristic.At this moment, can also according to actual needs, have in the load circuit 5 of inductance characteristic described, the load 53 described in giving with inductance characteristic connects or does not connect inductance (also can be the circuit containing inductance).The described load 53 with inductance characteristic is transformer, the coil of induction heating, wireless charging transmitting coil, loud speaker, other electromagnetic emission coil, load resistance or rectifier etc.; here no matter described in there is inductance characteristic load 53 are which type of structure, as long as it has the protection range that inductance characteristic is all this patent.What needs further illustrated is, when use the coil of induction heating or wireless charging transmitting coil as described there is the load of inductance characteristic time, in order to arrive best working effect, described load 53 loop with inductance characteristic also comprises electric capacity C9, described electric capacity C9 and the described load 53 with inductance characteristic loop in series.
In the present embodiment, described first switching device 1, described second switch device 2, described 3rd switching device 3 and described 4th switching device 4 can be that high speed thyristor, turn-off thyristor, power transistor, field-effect transistor are or/and gated transistor.
In the present embodiment, zero-voltage zero-current operating state is in order to make described first switching device 1, described second switch device 2, described 3rd switching device 3 and described 4th switching device 4, by the inductance of lc circuit 51 and the value of electric capacity described in appropriate design, or suitable described first external control signal DR3 and the operating frequency of described second external control signal DR4 can be selected.
In the present embodiment, described first external control signal DR3 and described second external control signal DR4 is the switching signal containing dead band of one group of complementation, and the present embodiment is adapted at using when supply voltage is lower.
The use principle of the present embodiment is:
(1) after, having powered on, first external control signal DR3 controls described 3rd switching device 3 conducting by described 3rd control end, the first control signal is formed at described first node M, described first control signal controls the conducting of described second switch device 2 by described second control end, and described second switch device 2, described lc circuit 51, load 52 and described 3rd switch form performance loop;
(2), described first external control signal DR3 is disconnected by described 3rd switching device 3 of described 3rd control end control, form the second control signal at described first node M, described second control signal controls described second switch device 2 by described second control end and disconnects;
After described second switch device 2 disconnects, form the 3rd control signal at described Section Point N, the 3rd control signal controls described first switch conduction by described first control end;
(3), after the first dead band, the second external control signal DR4 controls described 4th switching device 4 conducting by described 4th control end; After described first switching device 1 and described 4th switching device 4 conducting, electric current is at described first switching device 1, described lc circuit 51, form performance loop between load 52 and described 4th switch;
(4), described second external control signal DR4 is disconnected by described 4th switching device 4 of described 4th control end control, form the 4th control signal at described Section Point N and control described first switching device 1 and disconnect, and forming the 5th control signal at described first node M, described 5th control signal controls the conducting of described second switch device 2;
(5), after the second dead band, it is open-minded that described first external control signal DR3 controls described 3rd switching device 3 again, after described second switch device 2 and described 3rd switching device 3 are opened again, electric current forms performance loop at described second switch device 2, described lc circuit 51, load 52 and described 3rd switch;
(6), (2) is repeated to (5) step, full-bridge circuit periodic duty.
In the present embodiment, described first external control signal DR3, described second external control signal DR4 control described 3rd switching device 3 and described 4th switching device 4 conducting respectively by high level signal, and described first external control signal DR3 and described second external control signal DR4 controls described 3rd switching device 3 respectively by low level signal and described 4th switching device 4 disconnects.
In the present embodiment, described 3rd switching device 3 and described 4th switching device 4 conducting can also be controlled by low level signal, and control described 3rd switching device 3 by high level signal and described 4th switching device 4 disconnects.
In the present embodiment, described first control signal, described 3rd control signal and described 5th control signal can be low level signals, then described second control signal and described 4th control signal can be high level signals, conducting when so described first switching device 1 and described second switch device 2 receive low level signal, and disconnect when described first switching device 1 and described second switch device 2 receive high level signal.
In the present embodiment, described first control signal, described 3rd control signal and described 5th control signal can also be high level signals, then described second control signal and described 4th control signal can be low level signals, conducting when so described first switching device 1 and described second switch device 2 receive high level signal, and disconnect when described first switching device 1 and described second switch device 2 receive low level signal.
In the present embodiment, one end of power supply is negative or positive electrode, then the other end of power supply is negative pole or positive pole.Described 3rd switching device 3 and described 4th switching device 4 are PMOS or NMOS tube, then described second switch device 2 and described first switching device 1 are NMOS tube or PMOS.
Refer to Fig. 4 and Fig. 5, circuit diagram and the working waveform figure of Fig. 4 and Fig. 5 to be disclosed be embodiment shown in Fig. 3, in the present embodiment, that the first switching device 1, second switch device 2, the 3rd switching device 3 and the 4th switching device 4 adopt is pmos fet Q1, pmos fet Q2, nmos fet Q3 and nmos fet Q4, hereinafter referred to as Q1, Q2, Q3 and Q4, load is that transformer T is hereinafter referred to as T.The inductance L that lc circuit 51 comprises electric capacity C1 and connects with described electric capacity C1, hereinafter referred to as C1 and L.Described first external control signal DR3 and described second external control signal DR4 is hereinafter referred to as DR3 and DR4, and described first node M is called for short M point, and described Section Point N is hereinafter referred to as N point, and power supply Vin+ is called for short Vin+.In described full-bridge circuit supply voltage and operating voltage (DR3 and DR4 magnitude of voltage) lower than the grid (VGS) of Q1, Q2, Q3 and Q4 the highest withstand voltage time, just can realize Q1, Q2 self-excitation cross-drive, namely the present embodiment is applicable to being used in low-voltage full-bridge circuit.
In the following description, the disconnection when pressure reduction that no-voltage disconnects or no-voltage conducting refers between the drain electrode of Q1, Q2, Q3 and Q4 and source electrode of Q1, Q2, Q3 and Q4 is zero substantially or turn on process.
The operation principle of the present embodiment is: starting state, DR3, DR4 are low level, Q1, Q2 postpone certain hour and also can end, when DR3 is by low uprising, Q3 conducting, M point current potential drop to (the first control signal), Q2 also conducting thereupon (normal work be no-voltage conducting), electric current I 1 is by Q2 → T → L → C1 → Q3 → ground.
Through certain hour, DR3 becomes low level, because the distributed capacitance of Q1, Q3 and Q2 exists, Q3 is that no-voltage disconnects, electric current I 1 transition is electric current I 2, charge to the distributed capacitance of M point (distributed capacitance of Q1, Q3 and Q2), promote M point current potential and rise to Vin+(second control signal by ground), electric current I 1 transition is electric current I 2, now Q2 no-voltage disconnects (because the distributed capacitance of Q2, Q4, Q1 exists), and the continuation flowing of electric current I 2 makes N point voltage drop to earth potential (the 3rd control signal).
The conducting of Q1 no-voltage, Q4 enters zero-voltage state (pressure reduction between drain electrode and source electrode is zero substantially), current direction on L is electric current I 3 by electric current I 2 transition, following DR4 becomes high level, the conducting of Q4 no-voltage, along with the continuation of electric current I 3 is flowed electric current composition and the t6 → t7 and t7 → t8 of two time periods (electric current I 3 is actual be here), electric current I 3 couples of electric capacity C1 charge, discharged by T, electric current I 3 reduces to 0 very soon simultaneously.Next, under the voltage effect of Vin and electric capacity C1, the current transition on L is that electric current I 4(is by Q1 → C1 → L → T → Q4) direction (realizing electric current commutation) start progressively to rise, and provide electric current to T.
Through after a period of time, Q4 no-voltage disconnects, electric current I 4 pairs of N point distributed capacitance (distributed capacitance of Q2, Q1 and Q4) chargings, and N point voltage rises to Vin+(the 4th control signal), electric current I 4 flows to and changes into electric current I 5.In this process, Q1 no-voltage disconnect, the reverse charging of electric current I 5 pairs of M point distributed capacitance, M point voltage drop to (the 5th control signal).In this process, the conducting of Q2 no-voltage, behind dead band, DR3 becomes high level, the conducting of Q3 no-voltage, current direction by electric current I 5 transition be electric current I 6(I6 actual be that two parts electric current forms i.e. t2 → t3 and t3 → t4), after electric current I 6 reduces to zero, it is electric current I 1 that electric current I 6 flows to transition, completes a work period.Again through after a period of time, DR3 becomes low level, and Q3 no-voltage disconnects, and it is electric current I 2 that electric current I 1 flows to transition.Then repeat the above-mentioned course of work and continue always.
Refer to Fig. 7, the third embodiment of what Fig. 7 disclosed is a kind of self adaptation Novel Soft Switching full bridge driving circuit, its structure is substantially identical with the structure of embodiment shown in Fig. 3, no longer carries out repeated description to identical structure here.Difference is, in the present embodiment, also comprise diode D1, diode D2, diode D3 and diode D4, the first switching device 1 that diode D1, diode D2, diode D3 and diode D4 are corresponding with it respectively, second switch device 2, the 3rd switching device 3 and the 4th switching device 4 are in parallel, and provide reverse current path for it.In dead band between the first external control signal DR3 and the second external control signal DR4 is smaller, and when described first switching device 1, described second switch device 2, described 3rd switching device 3 and described 4th switching device 4 have reverse parasitic diode to provide backward channel, diode D1, diode D2, diode D3 and diode D4 can be saved.
Refer to Fig. 8, the block diagram of a kind of 4th kind of embodiment of self adaptation Novel Soft Switching full bridge driving circuit that what Fig. 8 disclosed is, its structure is substantially identical with the structure of embodiment shown in Fig. 3.Difference is, also comprises the first clamp circuit 7 and the second clamp circuit 8.
In the present embodiment, in described full-bridge circuit the voltage of supply voltage, first node M and the voltage change range of Section Point N more than the first control end of the first switching device 1 and second switch device 2 second control end the highest withstand voltage time, by using described first clamp circuit 7 and described second clamp circuit 8 strangulation, make the magnitude of voltage after strangulation meet the safe motivation value of described first control end and described second control end, thus make described first switching device 1 and described second switch device 2 realize self-excitation cross-drive.The full bridge driving circuit of this structure is suitable in the high full bridge driving circuit of voltage compare.
In embodiment, the two ends of described first clamp circuit 7 are connected with one end of power supply and Section Point N respectively, and the first clamp output of described first clamp circuit 7 is connected with described first control end.
In the present embodiment, the two ends of described second clamp circuit 8 are connected with one end of power supply and first node M respectively, and the second clamp output of described second clamp circuit 8 is connected with described second control end.
In the present embodiment, described first switching device 1, described second switch device 2, a described 3rd switching device 3 and described 4th switching device 4 all correspondingly diode (not shown) in parallel can also be given.
Refer to Fig. 9, the circuit diagram of embodiment shown in Fig. 8 that what Fig. 9 disclosed is, in fig .9, that the first switching device 1, second switch device 2, the 3rd switching device 3 and the 4th switching device 4 adopt is pmos fet Q1, pmos fet Q2, nmos fet Q3 and nmos fet Q4, hereinafter referred to as Q1, Q2, Q3 and Q4.
In the present embodiment, described first clamp circuit 7 comprises resistance R1, voltage stabilizing didoe Z1 and electric capacity C2, described resistance R1 and described voltage stabilizing didoe Z1 is in parallel, the first public connecting end after its parallel connection is connected with power supply Vin+, second public connecting end is connected with one end of Q1 grid and electric capacity C2 respectively, and the other end of electric capacity C2 is connected with Section Point N.
In the present embodiment, described second clamp circuit 8 comprises resistance R2, voltage stabilizing didoe Z2 and electric capacity C3, described resistance R2 and described voltage stabilizing didoe Z2 is in parallel, the first public connecting end after its parallel connection is connected with power supply Vin+, second public connecting end is connected with one end of Q2 grid and electric capacity C3 respectively, and the other end of electric capacity C3 is connected with first node M.
In the present embodiment, corresponding improvement can also be done on the basis of described first clamp circuit 7, namely refer to Figure 10 at described electric capacity C2 with the resistance R11(that connects between Q1 grid).Corresponding improvement can also be done on the basis of described second clamp circuit 8, namely refer to Figure 10 at described electric capacity C3 with the resistance R22(that connects between Q2 grid).Because the clamp circuit with clamp voltage function has a lot, here illustrate no longer one by one, as long as the circuit with clamp voltage function is all the protection range of the present embodiment.
Refer to Figure 11, the block diagram of a kind of 5th kind of embodiment of self adaptation Novel Soft Switching full bridge driving circuit that what Figure 11 disclosed is, its structure is identical with the basic structure of embodiment shown in Fig. 3.Difference is, also comprises the first inverter circuit 11, second inverter circuit 12, has the 3rd clamp circuit 9 of positive and negative clamp function and have the 4th clamp circuit 10 of positive and negative clamp function.
The effect of described 3rd clamp circuit 9 and described first inverter circuit 11 is, makes the signal being finally transferred to the first control end after being processed meet the described operating voltage of the first control end and the requirement of phase place.The effect of described 4th clamp circuit 10 and described second inverter circuit 12 is, make the signal being finally transferred to the second control end after being processed meet the described operating voltage of the second control end and the requirement of phase place, thus make the first switching device 1 and second switch device 2 realize self-excitation cross-drive.The full bridge driving circuit of this structure is applicable to high pressure full-bridge circuit.Here also to remark additionally: the drive singal of described first switching device 1 here, described second switch device 2 is obtained by the conversion of described first node M, described Section Point N; no matter be that Direct Transform obtains; or indirect conversion obtains, all belong to the protection range of patent of the present invention.
In the present embodiment, described 3rd clamp circuit 9 is connected with described Section Point N and described first node M respectively, and the 3rd clamp output of described 3rd clamp circuit 9 is connected with described first control end by described first inverter circuit 11.
In the present embodiment, described first inverter circuit 11 comprises the first inverter and provides the first accessory power supply of electric energy for described first inverter.The input voltage of described 3rd clamp circuit 9 to described first inverter carries out clamp, makes the voltage after strangulation meet the input voltage requirement of described first inverter.
In the present embodiment, described 4th clamp circuit 10 is respectively with described Section Point N and described first node M be connected with one end of power supply by starting resistance R3, and the 4th clamp output of described 4th clamp circuit 10 is connected with described second control end by described second inverter circuit 12.
In the present embodiment, described second inverter circuit 12 comprises the second inverter and provides the second accessory power supply of electric energy for described second inverter.The input voltage of described 4th clamp circuit 10 to described second inverter carries out clamp, makes the voltage after strangulation meet the input voltage requirement of described second inverter.
Refer to Figure 12, the circuit diagram of embodiment shown in Figure 11 that what Figure 12 disclosed is, in fig. 12, what the first switching device 1, second switch device 2, the 3rd switching device 3 and the 4th switching device 4 adopted is all nmos fet or gated transistor.
In the present embodiment, first inverter circuit 11 comprises the first inverter 112 and provides the first accessory power supply 111 of electric energy for described first inverter 112, described first accessory power supply 111 comprises electric capacity C6 and voltage stabilizing didoe Z3, electric capacity C6 and voltage stabilizing didoe Z3 is in parallel, the first common port after parallel connection is connected with a power supply side of described first inverter 112, second common port is connected with Section Point M, another power supply side of described first inverter 112 is connected with described Section Point M, the inversion signal output of described first inverter 112 is connected with the first control end of the first switching device 1.Described first accessory power supply 111 can be other power supplys, here differs one to illustrate, as long as provide the circuit of electric energy all to belong to the protection range of described first accessory power supply 111 for described first inverter circuit 11.
In the present embodiment, described 3rd clamp circuit 9 comprises electric capacity C4, diode D5 and diode D6, one end of electric capacity C4 is connected with Section Point N, the other end of electric capacity C4 is connected with the signal input part of the positive pole of diode D5, the negative pole of diode D6 and described first inverter 112 respectively, the negative pole of diode D5 is connected with a power supply side of described first inverter 112, and the positive pole of diode D6 is connected with described first node M.
In the present embodiment, described second inverter circuit 12 comprises the second inverter 122 and provides the second accessory power supply 121 of electric energy for described second inverter 122, described second accessory power supply 121 comprises electric capacity C7 and voltage stabilizing didoe Z4, electric capacity C7 and voltage stabilizing didoe Z4 is in parallel, the first common port after parallel connection is connected with a power supply side of described second inverter 122, second common port is connected with described Section Point N, another power supply side of described second inverter 122 is connected with described Section Point N, the described inversion signal output of the second inverter 122 is connected with the second control end of second switch device 2.Described second accessory power supply 121 can be other power supplys, here differs one to illustrate, as long as provide the circuit of electric energy all to belong to the protection range of described second accessory power supply 121 for described second inverter circuit 12.
In the present embodiment, described 4th clamp circuit 10 comprises electric capacity C5, diode D7 and diode D8, one end of electric capacity C5 is connected with described first node M, the other end of electric capacity C5 is connected with the signal input part of the positive pole of diode D7, the negative pole of diode D8 and described second inverter 122 respectively, the negative pole of diode D7 is connected with a power supply side of described second inverter 122 and one end of starting resistance R3 respectively, the other end of starting resistance R3 is connected with power supply, and the positive pole of diode D8 is connected with described Section Point N.
In the present embodiment, described first switching device 1, described second switch device 2, a described 3rd switching device 3 and described 4th switching device 4 all correspondingly diode (not shown) in parallel can also be given.
In the present embodiment, the first external control signal end DR3 and the second external control signal end DR4 is hereinafter referred to as DR3 and DR4, and described first node M is called for short M point, and described Section Point N is hereinafter referred to as N point.
The operation principle of the present embodiment is: starting state, and DR3, DR4 are all low level, and described 3rd switching device 3, described 4th switching device 4 are in off-state; The result of being charged by starting resistance R3, postpone the regular hour, N point and M point all have higher current potential, and described first switching device 1 disconnects.Following DR3 becomes high level, described 3rd switching device 3 conducting, and M point rapidly drops to earth potential, electric current I 33 is charged to C5 through D8, make the input of described second inverter 122 become low level, described second inverter 122 exports as high level, the conducting of described second switch device 2.Due to described second switch device 2 and the conducting simultaneously of described 3rd switching device 3, now N point current potential is the current potential of Vin+, M point is ground level, and the electric current Jing San Road of N point flows into M point, this three roads electric current is respectively: 1) electric current I 11 is through load → lc circuit → M point, provides electric current to load simultaneously; 2) electric current I 22 is through C4 → D5 → C6 → M point, and to C6 charging, the electric energy of the upper storage of C6 is that described first inverter 112 is powered; 3) electric current I 33 is through D8 → C5 → M point, causes described second inverter 122 input to be electronegative potential, and described second inverter 122 output is high potential, makes described second switch device 2 maintain conducting.
Through after a period of time, DR3 current potential becomes low level, described 3rd switching device 3(no-voltage) disconnect, the continuation flowing of electric current I 11 makes M point rise to Vin+, the discharging current I55 of C5 by C5 through D7 → C7 → N point, simultaneously to C7 charging, the electric energy of the upper storage of C7 is that described second inverter 122 is powered.Now described second inverter 122 input is high level, and output is low level, described second switch device 2(no-voltage) disconnect, the continuation flowing of electric current I 11 makes the current potential of N point become earth potential.Now electric current I 66 is through D6 → C4 → N point, described first inverter 112 is made to be input as low level, export as high level, described first switching device 1(no-voltage) conducting, now M point is Vin+, N point current potential is earth potential, electric current I 55 is through C5 → D7 → C7 → N point simultaneously, to C7 charging, behind dead band, DR4 becomes high level, described 4th switching device 4 (no-voltage) conducting.
Electric current I 11 transition is electric current I 44, electric current I 44 by Vin+ through described first switching device 1 → lc circuit 5 → load → described 4th switching device 4 to ground, provide electric current to load.Through after a period of time, DR4 becomes low level, described 4th switching device 4(no-voltage) disconnect, the continuation flowing of electric current I 44 promotes N point current potential to Vin+, the discharging current electric current I 22 of C4 is through N point → C4 → D5 → C6 → M point, make described first inverter be input as high level, export as low level, described first switching device 1(no-voltage) disconnect.The continuation flowing of electric current I 44 makes the current potential of M point drop to earth potential, the electric current of electric current I 33 makes described second inverter 122 be input as low level, export as high level, described second switch device 2(no-voltage) conducting, electric current I 22 is charged to C6 through C4 → D5, make described first inverter 112 input be clamped at high level, export as low level, maintain described first switching device 1 off-state.Behind dead band, DR3 becomes high level, and described 3rd switching device 3 (no-voltage) conducting, electric current I 44 transition is the process that electric current I 11 repeats above.
Claims (10)
1. a self adaptation Novel Soft Switching full-bridge circuit driving method, comprise the first switching device, second switch device, the full-bridge circuit that 3rd switching device and the 4th switching device are formed, described first switching device and described 3rd switching device series connection, described second switch device is connected with described 4th switching device, described first switching device is connected with one end of power supply respectively with described second switch device, described 3rd switching device is connected with the other end of power supply respectively with described 4th switching device, it is characterized in that: drive in the process of load using described full-bridge circuit, described full-bridge circuit carries out work by the following course of work:
(1) after, having powered on, first external control signal controls described 3rd switch device conductive, form the first control signal in connection line between described first switching device and described 3rd switching device and control described second switch break-over of device, described second switch device, the load circuit with inductance characteristic and described 3rd switch form performance loop;
(2), described first external control signal controls described 3rd switching device and disconnects, and forms the second control signal and control described second switch device to disconnect in the connection line between described first switching device and described 3rd switching device;
After described second switch device disconnects, form the 3rd control signal in the connection line between described second switch device and described 4th switching device, the 3rd control signal controls described first switch conduction;
(3), after the first dead band, the second external control signal controls described 4th switch device conductive; After described first switching device and described 4th switch device conductive, electric current described first switching device, described in have between the load circuit of inductance characteristic and described 4th switch and form performance loop;
(4), described second external control signal controls described 4th switching device disconnection, form the 4th control signal in connection line between described second switch device and described 4th switching device and control described first switching device and disconnect, form the 5th control signal in connection line between described first switching device and described 3rd switching device, described 5th control signal controls described second switch break-over of device;
(5), after the second dead band, it is open-minded that described first external control signal controls described 3rd switching device again, after described second switch device and described 3rd switching device are opened again, electric current described second switch device, described in have inductance characteristic load circuit and described 3rd switch formed performance loop;
(6), (2) is repeated to (5) step, full-bridge circuit periodic duty.
2. self adaptation Novel Soft Switching full-bridge circuit driving method according to claim 1, is characterized in that: described first external control signal and described second external control signal are containing described first dead band, described second dead band and one of complementation group of drive singal.
3. self adaptation Novel Soft Switching full-bridge circuit driving method according to claim 1 and 2, it is characterized in that: described in there is inductance characteristic load circuit comprise load, and to be connected with described load and there is the circuit of inductance characteristic, the described circuit with inductance characteristic for described Load transportation energy, and make described full-bridge circuit be operated in described in there is the perceptual section of the circuit of inductance characteristic.
4. a self adaptation Novel Soft Switching full bridge driving circuit, comprise the first switching device, second switch device, the full-bridge circuit that 3rd switching device and the 4th switching device are formed, described first switching device and described 3rd switching device series connection, described second switch device is connected with described 4th switching device, described first switching device is connected with one end of power supply respectively with described second switch device, described 3rd switching device is connected with the other end of power supply respectively with described 4th switching device, it is characterized in that: also comprise the load circuit with inductance characteristic, first external control signal is communicated with the 3rd control end of described 3rd switching device, second external control signal is communicated with the 4th control end of described 4th switching device, connection line between described first switching device and described 3rd switching device is provided with first node, connection line between described second switch device and described 4th switching device is provided with Section Point, first control end of described first switching device is connected with described Section Point, second control end of described second switch device is connected with described first node, and the load circuit described in described first node passes through with inductance characteristic is connected with described Section Point.
5. self adaptation Novel Soft Switching full bridge driving circuit according to claim 4, it is characterized in that: described in there is inductance characteristic load circuit comprise load, and to be connected with described load and there is the circuit of inductance characteristic, the described circuit with inductance characteristic for described Load transportation energy, and make described full-bridge circuit be operated in described in there is the perceptual section of the circuit of inductance characteristic; The described circuit with inductance characteristic is lc circuit or inductance.
6. self adaptation Novel Soft Switching full bridge driving circuit according to claim 4, is characterized in that: described in there is inductance characteristic load circuit comprise the load with inductance characteristic.
7. the self adaptation Novel Soft Switching full bridge driving circuit according to claim 4,5 or 6, it is characterized in that: also comprise the first clamp circuit, the two ends of described first clamp circuit are connected with one end of power supply and described Section Point respectively, and the first clamp output of described first clamp circuit is connected with described first control end.
8. self adaptation Novel Soft Switching full bridge driving circuit according to claim 7, it is characterized in that: also comprise the second clamp circuit, the two ends of described second clamp circuit are connected with one end of power supply and described first node respectively, and the second clamp output of described second clamp circuit is connected with described second control end.
9. the self adaptation Novel Soft Switching full bridge driving circuit according to claim 4,5 or 6, it is characterized in that: also comprise the first inverter circuit and the 3rd clamp circuit with positive and negative clamp function, described 3rd clamp circuit is connected with described Section Point and described first node respectively, and the 3rd clamp output of described 3rd clamp circuit is connected with described first control end by described first inverter circuit.
10. self adaptation Novel Soft Switching full bridge driving circuit according to claim 9, it is characterized in that: also comprise the second inverter circuit and the 4th clamp circuit with positive and negative clamp function, described 4th clamp circuit is respectively with described Section Point and described first node be connected with one end of power supply by starting resistance, and the 4th clamp output of described 4th clamp circuit is connected with described second control end by described second inverter circuit.
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| CN201510187225.7A CN104811019B (en) | 2015-04-21 | 2015-04-21 | Self-adaptive novel soft switching full-bridge circuit driving method and full-bridge driving circuit |
| PCT/CN2016/079522 WO2016169446A1 (en) | 2015-04-21 | 2016-04-16 | Drive method for self-adaptive soft-switch full-bridge circuit, and full-bridge drive circuit |
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| CN201510187225.7A CN104811019B (en) | 2015-04-21 | 2015-04-21 | Self-adaptive novel soft switching full-bridge circuit driving method and full-bridge driving circuit |
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Cited By (2)
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| WO2016169446A1 (en) * | 2015-04-21 | 2016-10-27 | 吴秀昌 | Drive method for self-adaptive soft-switch full-bridge circuit, and full-bridge drive circuit |
| CN108111004A (en) * | 2017-12-29 | 2018-06-01 | 电子科技大学 | A kind of hybrid device for realizing Si IGBT Sofe Switch characteristics |
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| GB201721610D0 (en) * | 2017-12-21 | 2018-02-07 | British American Tobacco Investments Ltd | Circuitry for an induction element for an aerosol generating device |
| GB201721612D0 (en) | 2017-12-21 | 2018-02-07 | British American Tobacco Investments Ltd | Circuitry for a plurality of induction elements for an aerosol generating device |
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| CN104811019B (en) * | 2015-04-21 | 2017-05-03 | 吴秀昌 | Self-adaptive novel soft switching full-bridge circuit driving method and full-bridge driving circuit |
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| US20040041619A1 (en) * | 2002-06-06 | 2004-03-04 | International Recitifier Corporation | Mosgate driver integrated circuit with adaptive dead time |
| CN102664551A (en) * | 2012-05-11 | 2012-09-12 | 德州三和电器有限公司 | Self-driven power frequency synchronous phase conversion full-bridge circuit |
| DE202015100689U1 (en) * | 2015-02-12 | 2015-03-09 | Asia Vital Components (China) Co., Ltd. | Drive circuit for motor to reduce the switching loss |
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Also Published As
| Publication number | Publication date |
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| WO2016169446A1 (en) | 2016-10-27 |
| CN104811019B (en) | 2017-05-03 |
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