CN201219234Y - Resonance driving module with dynamic power supply - Google Patents

Abstract

A resonance driving module with self dynamic power supply is composed of an input isolation transformer, a rectifier circuit, a power electronic device V[Q], wherein, the rectifier circuit is composed of EB terminals of the transistor V[SO1] and transistors V[SO2], as well as capacitances C[1] and C[2], and the C[1] and C[2] are respectively in parallel connection with voltage regulator diodes D [Z1] and D [Z2]; a capacitance Ci is connected in parallel, and an inductance Lr is connected in series between the rectifier circuit and the power electronic devices V[Q]. The utility model can not only solves defects of the isolative high-frequency-driven approach of non co-grounding power electronic switch, but also distinguishes from the traditional hard-switching complementary emitter-following totem pole drive approach. The utility model is a low loss resonance driving module special for non co-grounding power electronic switch, which has advantages of higher reliability, small loss, higher efficiency and higher performance-price ratio.

Description

Carry the resonant drive module of dynamic power supplies

Technical field

The utility model relates to Switching Power Supply, particularly a kind of resonant drive module that carries dynamic power supplies.

Background technology

The most important position of Switching Power Supply is an electronic power switch, and this is the key position of light current control forceful electric power, can extremely express with the D utmost point of representing the forceful electric power switch, the S utmost point and the G that represents light current to drive, as shown in Figure 1.When grid applies high level driving voltage Ugs (generally the being no more than 20 volts) period, see the t among Fig. 1 (C) ₁To t ₂, T ₃To t ₄, t ₅To t ₆Period makes the electronic power switch forceful electric power controlled, then there is ids to represent that electronic power switch is conducting (ON), and, see the period t among Fig. 1 (C) in the period that does not have driving voltage Ugs (no controlling signal) ₁, T ₂To t ₃, t ₄To t ₅, t ₆Later on etc., the power electronics of often opening open circuit (OFF).

The S utmost point permission ground connection (zero potential) of electronic power switch is called commonly to be controlled, and the connection of driving voltage Ugs at this moment is fairly simple, can connect with method in parallel.But, for non-electronic power switch altogether, for example bridge-type or semibridge system go up pipe, again for example in BUCK, the CUK topology S utmost point not altogether the driving of the electronic power switch on ground just very bothered.In order to separate by no means the electronic power switch driving problems on ground altogether, promote the development of power electronic technology, roughly there are three types: transformer isolation mode, light-coupled isolation mode, flying capacitor pump isolation method, as shown in Figure 2.

In the typical type of drive shown in Figure 2, cost is minimum, extensive use be (a) transformer TR isolation drive topology.The special high-frequency small-power type of drive that adapts to; If need to enlarge drive current, often custom is penetrated with the totem mode with the NPN-PNP complementation.See shown in Figure 3.

The non-Vcc of suspended power supply altogether (being generally 12 volts) among Fig. 3 to 18V, drive current flows through current-limiting resistance Rg, has consumed driving power, is called driving power consumption electric weight Δ Pg, expresses with following formula:

ΔPg＝Ci·U ²gs·f

In the following formula obviously as seen: drive loss electric weight Δ Pg, be proportional to frequency f, be proportional to input capacitance Ci, also be proportional to driving voltage Ugs square.Do you how reduce drive loss electric weight Δ Pg? select the little electronic power switch pipe of Ci, may cause switching tube saturation conduction resistance R ds (ON) higher, conduction loss also strengthens; Reducing frequency may cause inductance core to increase the weight of; Positive method should be paid close attention to and reduce driving voltage Ugs.Find out that by Fig. 4 driving voltage Ugs depends on power Vcc, allow to select for use the low power Vcc of trying one's best that positive effect is arranged under the prerequisite at the electronic power switch saturation conduction.

Summary of the invention

The utility model purpose is to provide a kind of resonant drive module that carries dynamic power supplies, both can separate by no means the isolation type high frequency driving method of electronic power switch altogether, is different from traditional hard switching complementation again and penetrates shortcoming with the totem driving method.It is a kind of low-loss resonant mode driver module that non-electronic power switch altogether drives special use that aims at.

The technical solution adopted in the utility model is: power supply is by input isolating transformer, rectification circuit, power electronic device (V _Q) form, rectification circuit is by transistor (V _S01) and transistor (V _S02) EB end and electric capacity (C ₁, C ₂) form, and C ₁, C ₂Difference parallel voltage-stabilizing diode D _Z1And D _Z2At rectification circuit, power electronic device (V _Q) between shunt capacitance (Ci), series inductance (Lr).Input grid inductance L r and input capacitance Ci series resonance, electric capacity (Ci) two ends are parallel with voltage stabilizing didoe D _Z11And D _Z2, in order to avoid blasting and damage grid G.

Description of drawings

Fig. 1 is the electronic power switch schematic diagram of the light current G utmost point control forceful electric power D utmost point and S utmost point break-make.

Fig. 2 is the canonical topology schematic diagram of non-electronic power switch isolation drive altogether.

Fig. 3 is that traditional hard switching complementation is penetrated Sui Quan and risen post and drive topological schematic diagram.

Fig. 4 is the resonant drive module topology schematic diagram that carries dynamic power supplies described in the utility model.

Fig. 5 is the resonant drive module control method schematic diagram that carries dynamic power supplies described in the utility model.

Embodiment

Below in conjunction with accompanying drawing the technical solution of the utility model is described in further detail.

From Fig. 3 as seen, when input high level, V _S1(NPN transistor) obtains collector current Ic from suspended power supply Vcc, from emitter-base bandgap grading output Ie, through current-limiting resistance Rg, to capacity load Ci power supply, obtains driving electric electronic switch V _QDriving voltage Ugs.And when the input low-voltage, V _S2(PNP transistor) conducting capacity load Ci stores electric charge through resistance R g current limliting, discharges through the PNP transistor conducting.So the driving power consumption of power Vcc all consumes generates heat at resistance R g.In addition, V _S1(NPN transistor) and V _S2(PNP transistor) also exists straight-through dangerous, may cause the harm of power Vcc short circuit.See burr and hangover from real driving voltage Ugs waveform, wherein burr is hard switching parasitism blue interference of shaking, and hangover may cause electronic switch V _QHard switching loss heating influences efficient.

From Fig. 4 as seen, input current i _INOnly flow through the former side's winding N that isolates magnetic core B ₁, through pair side winding N ₂After the transformation, by transistor V _S01With transistor V _S02EB end and capacitor C ₁, C ₂Form rectification, and by voltage stabilizing didoe D _Z1And D _Z2Parallel voltage-stabilizing obtains dynamic capacity pumping source+V _ONWith-V _OFF, as input current i _INTransistor V during input high level _S01(PNP) make transistor V _S1(NPN) conducting is dynamic capacity pumping source V _ONThrough diode D ₁-inductance L r-capacitor C i driving voltage Ugs, and by voltage stabilizing didoe DZ ₁₁, DZ ₂₁Protection is unlikely blasting and damages grid G, because diode D ₁Existence, driving voltage Ugs is able to keep at capacitor C i, obtains flat-top and clean waveform.Because inductance L r-capacitor C i resonance effect is guaranteeing enough to make power electronic device V _QUnder the prerequisite of saturation conduction, power supply V _ONLess than driven voltage U gs, this is that the drive power losses of resonant drive is less, one of key that efficient is higher.And because transistor Vs ₁And Vs ₂Be soft switch, again because diode DV ₁, DV ₂, D ₁And D ₂The dead band time delay that causes of switch time-delay, avoided transistor VS ₁And VS ₂Straight-through harm.It is bigger to have solved Fig. 3 hard switching drive loss, and problems such as straight-through danger are arranged again.

It is as input current i that Fig. 4 also has an advantage _1NDuring low level, the G utmost point is stored electric charge rapidly by capacitor C i-inductance L r-transistor Vs ₂-(V _OFF) make driving voltage Ugs obtain negative about 5 volts negative bias, for restraining power electronics pipe V _Q" the Miller effect ", eliminate the straight-through harm of half-bridge or full-bridge circuit and have key effect.

In Fig. 5, be " input high-frequency current i _1N" make the current driving method of Controlling Source, its antijamming capability is better than " input high frequency voltage U _In" voltage driving mode.In the practicality, each electronic power switch V _QBe main, manufacture module by Fig. 4, then i _1NFlow through former side's winding N that each isolates magnet ring B ₁, can realize that its antijamming capability is very strong with a high frequency closed loop feeder line, the back bias voltage that carries of binding modules drives, and higher reliability is arranged, and owing to be soft switch resonant drive, loss is little, and efficient is higher, and cost performance is more excellent, and stronger capacity of competition is arranged.

Claims (2)

1, a kind of resonant drive module that carries dynamic power supplies is by input isolating transformer, rectification circuit, power electronic device V _QForm, it is characterized in that rectification circuit is by transistor V _SO1With transistor V _SO2EB end and capacitor C ₁, C ₂Form, and C ₁And C ₂Difference parallel voltage-stabilizing diode D _Z1And D _Z2, at rectification circuit, power electronic device V _QBetween shunt capacitance Ci, series inductance Lr.

2, according to the described resonant drive module that carries dynamic power supplies of claim 1, it is characterized in that importing grid inductance L r and input capacitance Ci series resonance, described capacitor C i two ends are parallel with voltage stabilizing didoe D _Z11And D _Z21

Images