CN1034843C - High power DC (DC/DC) converting method and converter - Google Patents

High power DC (DC/DC) converting method and converter Download PDF

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Publication number
CN1034843C
CN1034843C CN93119166A CN93119166A CN1034843C CN 1034843 C CN1034843 C CN 1034843C CN 93119166 A CN93119166 A CN 93119166A CN 93119166 A CN93119166 A CN 93119166A CN 1034843 C CN1034843 C CN 1034843C
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capacitor
oscillator
output
controllable silicon
circuit
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CN1102018A (en
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邵钟武
张加胜
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Abstract

The present invention provides a high power direct current (DC/DC) converting method and a converter. A main circuit of the converter is a charging and discharging circuit which is composed of two inverse-resistance type silicon controlled rectifiers, two inductors, two electric capacitors, etc., and a control circuit is composed of a comparator, a square wave oscillator, an OR gate, an NAND gate, differentiating circuits, drivers, etc. The output of the comparator is connected to the enable end of the oscillator 5 by the OR gate 4, besides the output of the oscillator returns back to the enable end by the OR gate 4, one path of the output of the oscillator generates a signal S1 by the differentiating circuit 7 and the driver 8, and the other path generates a signal S2 by a phase inverter 6, the differentiating circuit 9 and the driver 10. Both of the signals S1 and S2 are totally delivered to the main circuit 2, and the main circuit is controlled to realize charge transfer.

Description

High power DC (DC/DC) transform method and converting means
The present invention relates to the transform method and the converting means thereof of a kind of high power DC electricity (DC/DC).
Producing at present and going up used high-power DC power supply mostly is to obtain after the AC network rectification, the proportionate relationship of strictness is arranged between its magnitude of voltage and the AC supply voltage value and can not change arbitrarily.The high power DC electricity of seek out arbitrarily, voltage is adjustable, present adoptable method has: controlled rectification, dynamoelectric and power generation unit, AC voltage adjusting rectification, DC chopped-wave conversion etc.The shortcoming of these methods is that the equipment therefor volume that has is big, fuselage heavy, price is high; What have then has serious disturbance to electrical network.
In view of above situation, the device that the present invention proposes a kind of high power DC (DC/DC) transform method and obtain according to this method.Its objective is for easily with the voltage transitions of a high-power DC power supply for another voltage or have the DC power supply of certain external characteristic (as constant voltage, constant current etc.).
The object of the present invention is achieved like this:
High power DC electricity transform method is achieved in that with an inverse-impedance type controllable silicon connects DC power supply, through an inductor capacitor is charged, this controllable silicon turn-offs voluntarily when this capacitor charges to maximum, thereby a certain amount of electric energy that DC power supply is exported is stored on this capacitor, use another controllable silicon then, through another inductor, the electric energy that is stored on this capacitor is discharged to load and another capacitor, to transfer to load from the electric energy that power supply gets and be stored on another capacitor in parallel with load, take turns the charge and discharge of control capacitor with certain frequency like this, just can realize the size of direct current (DC/DC) conversion and control output voltage and electric current.
High power DC (DC/DC) converter of inventing according to said method is achieved in that it comprises that a main circuit of being made up of controllable silicon, inductor, capacitor etc. and the control circuit of being made up of comparator, square-wave oscillator or door, NAND gate, differential circuit, driver etc. are constituted.Controllable silicon SCR 1, inductor L1 connect with capacitor C1 and constitute charge circuit, capacitor C1 is connected with another inductor L2, another controllable silicon SCR 2 and load again simultaneously, constitute another loop, at the load two ends and capacitor C2 is arranged, but on capacitor C1 the parallel discharge sustained diode; In the control circuit, the Enable Pin that the output warp of comparator or door 4 are received oscillator 5, the output of oscillator except that through or door 4 return its Enable Pin, one the tunnel through differential circuit 7 and driver 8 generation signal S1, another road produces signal S2 through inverter 6, differential circuit 9 and driver 10, two signals all are sent to main circuit 2, and the control main circuit realizes that electric charge shifts.
Fig. 1 is high power DC (DC/DC) transform method and a converter principle block diagram proposed by the invention;
Fig. 2 is the main circuit schematic diagram according to positive polarity high power DC electric transducer (DC/DC) proposed by the invention;
Fig. 3 is the main circuit schematic diagram during only with an inductor according to positive polarity high power DC converter (DC/DC) proposed by the invention;
Fig. 4 is the control circuit schematic diagram according to high power DC electric transducer proposed by the invention;
Fig. 5 is the main circuit schematic diagram according to negative polarity high power DC electric transducer proposed by the invention.
Among the figure, 1-DC power supply, 2-charge transfer circuit (being main circuit), 3-voltage comparator, 4-or door, 5-oscillator, 6-inverter, 7-differential circuit, 8-driver, 9-differential circuit, 10-driver.
Describe the concrete structure and the transform method of high power DC electric transducer proposed by the invention in detail below in conjunction with accompanying drawing.
Among Fig. 12 is charge transfer circuits, main circuit promptly of the present invention, and its end is connected with DC power supply 1, and input voltage is U1, and other end output voltage U 2 supply loads, the remainder among Fig. 1 except that 1 and 2 are control section of the present invention.The Enable Pin that the output warp of voltage comparator 3 or door 4 are received oscillator 5; The output of oscillator 5 except that through or door 4 return its Enable Pin, one the tunnel through differential circuit 7 and driver 8 generation signal S1, another road produces signal S2 through inverter 6, differential circuit 9 and driver 10, the signal S1 and the S2 that are produced are sent to charge transfer circuit 2, and the control main circuit realizes that electric charge shifts.
The main circuit basic structure of the direct current converter that foundation is proposed by the invention is shown in Fig. 2 (or Fig. 3), it is by two inverse-impedance type controllable silicon SCR 1 and SCR2, two (or one) inductor L1 and L2 (or L), a non-polar condenser C1, an electrolytic capacitor C2 forms.Controllable silicon SCR 1, inductor L1 and capacitor C1 constitute a charge circuit, while capacitor C1 and inductor L2, and controllable silicon SCR 2 constitutes another loop again.The course of work of main circuit is as follows: trigger controllable silicon SCR 1 with narrow pulse signal S1, make U1 pass through controllable silicon SCR 1, inductor L1 charges to capacitor C1, at this moment controllable silicon SCR 2 is ended, the electric current of U1 can not flow to output, so the electric charge that flows out from U1 in charging process all is stored on the capacitor C1.Owing to do not have dissipative cell in the charge circuit that inductor L1 and capacitor C1 constitute, its Q value is very high, so the charging process that produces is an oscillatory, when the half period of charging, voltage U C1 on the capacitor C1 reaches maximum, charging current reduces to zero, and controllable silicon SCR 1 is turn-offed naturally owing to be subjected to the effect of reverse voltage.Have no progeny with signal S2 triggering controllable silicon SCR 2 in the SCR1 pass, the electric charge that is stored on the capacitor C1 when charging flows to load by inductor L2, redundance to capacitor C2 charging and unloading on C2, the discharge process of Here it is capacitor C1, this process also is an oscillatory, and discharging current reduces to zero when the half period of this vibration, and controllable silicon SCR 2 is turn-offed naturally.Like this controllable silicon SCR 1 and SCR2 successively in turn conducting once, just with a certain amount of power conversion of power supply U1 to exporting among the U2, controllable silicon SCR 1 and SCR2 take turns the frequency F of conducting and have just determined the size of output voltage and electric current.Output capacitor C2 is in order to regulated output voltage and electric current.
Controllable silicon SCR 1 in the main circuit (Fig. 2) and the position of inductor L1, controllable silicon SCR 2 is all interchangeable with the position of inductor L2, does not influence the performance of circuit.Also two inductor L1 and L2 can be merged into an inductor L, C1 connects with capacitor, is connected on (Fig. 3) on the common branch, and sort circuit can be saved an inductor, but the volume of used inductor needs to increase, and the silicon controlled turn-off performance is had higher requirement.
Sustained diode in parallel with capacitor C1 among Fig. 2 also can.When not having diode D, when discharging, capacitor C1 can make the C1 reverse charge, and make UC1 when discharge off is negative value, this can be charged to higher voltage when capacitor C1 is charged next time, promptly each charging obtains more energy from U1, when same frequency F, can obtain same output, but at this moment capacitor C1 and the withstand voltage of controllable silicon SCR 1 to increase also with less capacitor C 1.
Fig. 4 is the control circuit figure according to direct current converter proposed by the invention, operational amplifier 324 among the figure is made the comparator 3 among Fig. 1, the reference edge UB of comparator joins through 1/150 dividing potential drop and the input voltage U1 about 300V, feedback end UF is connected with output voltage U 2 through 1/75 dividing potential drop, and such connection can make output voltage U 2 remain on the U1/2.Regulate the voltage ratio of U1 and UB or U2 and UF, can change the ratio of output voltage U 2 and input voltage U1, constant if benchmark UB keeps, and UF is directly proportional with output voltage U 2 or output current I2, then can get the output of constant voltage or constant-current characteristics.It is the square-wave oscillator of 600Hz that among Fig. 4 555 constitutes frequency, produces burst pulse behind the differential circuit differential of the rising edge of its output via 244 formations, is added to the control end of driver 8778, again through the pulse transformer isolation, produces the information S1 that opens SCR1; The trailing edge of oscillator output is opened the signal S2 of controllable silicon SCR 2 in order to generation, just finishes the transfer of a certain amount of electric charge so oscillator once vibrates.The Enable Pin of oscillator 555 through or door is connected with the output of comparator, oscillator 555 generations are vibrated so have only when output voltage U 2 during less than predetermined value, a certain amount of electric energy is exported from input redirect.Under the condition of converter operate as normal, the energy that stores on capacitor C2 between twice transfer of electric charge can be kept the fluctuation of output voltage or electric current in the scope that is allowed.
The anode and cathode of changing-over controllable silicon SCR 1, SCR2 and diode D can constitute high power DC (DC/DC) converter that is output as negative voltage.Fig. 5 is the main circuit schematic diagram of the high power DC converter of negative voltage output.
High power DC transform method provided by the present invention, can be easily be another voltage with the voltage transitions of a high-power DC power supply, or be converted to DC power supply with certain external characteristic, as constant voltage, constant current etc.The high power DC converter of making in this way, simple in structure, components and parts are few, function admirable, efficient height, in light weight, price is low, can be fully without cumbersome apparatus such as transformer, reactors.

Claims (3)

1. a high power DC (DC/DC) transform method, it is characterized in that: connect DC power supply with an inverse-impedance type controllable silicon, through inductor one capacitor is charged, this controllable silicon turn-offs voluntarily when this capacitor charges to maximum, thereby a certain amount of electric energy that DC power supply is exported is stored on this capacitor, use another controllable silicon again, through another inductor, the electric energy that is stored on this capacitor is discharged to load and another capacitor, to transfer to load from the electric energy that power supply gets and be stored on another capacitor in parallel with load, take turns the charge and discharge of control capacitor with certain frequency, just can realize high power DC (DC/DC) conversion, and the size of control output voltage and electric current.
2. a high power DC (DC/DC) converting means, comprise inverter main circuit of forming by controllable silicon, inductor, capacitor etc. and the control circuit of forming by comparator, square-wave oscillator or door, NAND gate, differential circuit, driver etc., it is characterized in that: controllable silicon (SCR1), inductor (L1) connect and compose charge circuit with capacitor (C1), capacitor (C1) connects and composes discharge loop, shunt capacitor in the load (C2) with inductor (L2), controllable silicon (SCR2), load again simultaneously; An input of the comparator of control circuit (3) is connected with reference voltage (UB), another input connects and the proportional feedback voltage (Uf) of output voltage (U2) (or output current I2), the output of comparator by or the Enable Pin of door 4 connection side's wave oscillators 5, when feedback voltage (Uf) during less than (UB) comparator output high level make oscillator produce square wave; The output of oscillator, one tunnel rising edge of oscillator being exported square wave through differential circuit (7) and driver (8) converts the signal (S1) that triggers controllable silicon (SCR1) to; Another road of oscillator output is through inverter (6), differential circuit (9) and driver (10), and the trailing edge of oscillator being exported square wave converts the signal (S2) that triggers controllable silicon (SCR2) to; In addition, the output of oscillator is also received or the input of door (4), can both export a complete square wave to guarantee oscillator at every turn, make two triggering signals (S1) and (S2) between the sufficiently long time is arranged, in order to avoid two controllable silicons (SCR1 and SCR2) while conducting.
3. high power DC according to claim 2 (DC/DC) converting means is characterized in that, two inductors (L1) in the main circuit and (L2) can merge into an inductor (L), and (C1) connects with capacitor, is connected on the common branch.
CN93119166A 1993-10-16 1993-10-16 High power DC (DC/DC) converting method and converter Expired - Fee Related CN1034843C (en)

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Application Number Priority Date Filing Date Title
CN93119166A CN1034843C (en) 1993-10-16 1993-10-16 High power DC (DC/DC) converting method and converter

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Application Number Priority Date Filing Date Title
CN93119166A CN1034843C (en) 1993-10-16 1993-10-16 High power DC (DC/DC) converting method and converter

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CN1102018A CN1102018A (en) 1995-04-26
CN1034843C true CN1034843C (en) 1997-05-07

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100353651C (en) * 2004-08-11 2007-12-05 统宝光电股份有限公司 DC/DC transducer and DC power supply system

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0547803A2 (en) * 1991-12-19 1993-06-23 Nokia Mobile Phones Ltd. Voltage multiplier

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0547803A2 (en) * 1991-12-19 1993-06-23 Nokia Mobile Phones Ltd. Voltage multiplier

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100353651C (en) * 2004-08-11 2007-12-05 统宝光电股份有限公司 DC/DC transducer and DC power supply system

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