CN103414354A - Power switch device pulse transformer isolation driving circuit - Google Patents
Power switch device pulse transformer isolation driving circuit Download PDFInfo
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- CN103414354A CN103414354A CN2013102980673A CN201310298067A CN103414354A CN 103414354 A CN103414354 A CN 103414354A CN 2013102980673 A CN2013102980673 A CN 2013102980673A CN 201310298067 A CN201310298067 A CN 201310298067A CN 103414354 A CN103414354 A CN 103414354A
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Abstract
The invention discloses a power switch device pulse transformer isolation driving circuit. The power switch device pulse transformer isolation driving circuit comprises a primary-side circuit, a pulse transformer Tr and a secondary-side circuit, wherein the primary-side circuit comprises an NPN transistor Q2, a PNP transistor Q3 and a blocking capacitor C1, and the secondary-side circuit comprises a power switch device Q1, a driving resistor Rg, a gate discharge resistor Rs, a diode D1, a compensation capacitor C2, a voltage-regulator tube Z1 and a negative pressure holding capacitor C3. The power switch device pulse transformer isolation driving circuit of the invention can be applied to all switching converters such as a boost converter, a buck converter, a forward converter, a flyback converter, a half-bridge switching converter, a half-bridge converter, a full-bridge converter and a push-pull converter, and can effectively improve the reliability of the switching converters.
Description
Technical field
The present invention relates to the switch mode power converters field, in particular to a kind of device for power switching pulse transformer isolated drive circuit in power inverter.
Background technology
In switch mode power converters, device for power switching often needs isolation drive, conventional method is to adopt light-coupled isolation to add power amplification circuit to carry out the driving power switching device, but the method needs independently isolation drive power supply, and this can increase the complexity of extra cost and circuit.In the middle low power application scenario, usually adopt the pulse transformer isolated drive circuit, to reduce extra driving power, reduce costs, as shown in Figure 1, be the first pulse transformer isolated drive circuit, it comprises transistor Q
2And Q
3, capacitance C
1, pulse transformer Tr, Q
1That device for power switching MOSFET(in converter can be also IGBT), R
gTo drive resistance, R
sIt is the grid discharge resistance.Shown in Figure 2 is the groundwork oscillogram of drive circuit shown in Figure 1, and wherein: shown in Fig. 2 (a), be the pwm signal waveform, amplitude is Vcc, and duty ratio is D; Shown in Fig. 2 (b), be capacitance C
1Voltage waveform, consider capacitance C
1Capacity enough large, ignore its mains ripple, ignore transistorized tube voltage drop, as can be known according to the weber equilibrium principle of transformer, capacitance C
1Voltage Vc
1Equal DVcc; Shown in Fig. 2 (c), be after-applied at device for power switching Q through Isolated Pulse Transformer Tr
1The driving signal at grid source electrode two ends, its positive pulse voltage amplitude are n (1-D) Vcc, and negative pulse voltage amplitude is nDVcc, and n is the turn ratio of pulse transformer Tr here, n=N2/N1.As can be seen here, after pulse transformer Tr, device for power switching Q
1The positive and negative amplitude of the driving signal obtained is relevant with the duty ratio D of pwm signal, when duty ratio D hour, the true amplitude that drives signal is larger, negative amplitude is less, and when duty ratio D was larger, the true amplitude that drives signal was less, negative amplitude is larger, does not even reach device for power switching Q
1Needed driving voltage amplitude, therefore, the first pulse transformer isolated drive circuit shown in Figure 1 is not suitable for the application scenario that change in duty cycle is larger.
The problem existed in order to solve the first pulse transformer isolated drive circuit shown in Figure 1, Figure 3 shows that the second pulse transformer isolated drive circuit, this is the pulse transformer isolated drive circuit with voltage recovery capability that a kind of driving voltage amplitude does not change with change in duty cycle, with circuit shown in Figure 1, compare, increased a diode D at secondary side
1With a building-out capacitor C
2.Shown in Figure 4 is the groundwork oscillogram of the second pulse transformer isolated drive circuit shown in Figure 3, and wherein: shown in Fig. 4 (a), be the pwm signal waveform, amplitude is Vcc, and duty ratio is D; Shown in Fig. 4 (b), be capacitance C
1Voltage waveform, consider capacitance C
1Capacity enough large, ignore its mains ripple, ignore transistorized tube voltage drop, as can be known according to the weber equilibrium principle of transformer, capacitance C
1Voltage Vc
1Equal DVcc; Shown in Fig. 4 (c), be building-out capacitor C
2Voltage waveform, ignore diode D
1Tube voltage drop, building-out capacitor C
2Both end voltage is nDVcc, as can be known by the second pulse transformer isolated drive circuit principle shown in Figure 3, building-out capacitor C
2Voltage can compensate capacitance C
1The decline of the driving pulse amplitude that voltage causes, thereby the pulse amplitude of maintenance pwm signal; Shown in Fig. 4 (d), be to be applied to device for power switching Q
1The driving signal at grid source electrode two ends, through building-out capacitor C
2After the compensation of voltage, drive the pulse that signal only has forward, pulse amplitude is nVcc, and pulse transformer Tr turn ratio n gets 1 usually, and therefore driving signal keeps consistent with pwm signal fully, and is not subjected to the impact of duty ratio D.
But, in the high-reliability switch converter, in order to improve the reliability of device for power switching work, at the switching device blocking interval, usually need to apply the negative voltage of certain amplitude, not affected by noise and open by mistake logically with the guaranteed output switching device, and still need its direct impulse voltage magnitude and negative bias voltage amplitude not to be subjected to the impact of duty ratio D and to keep constant.
Summary of the invention
The purpose of this invention is to provide a kind of device for power switching pulse transformer isolated drive circuit, this circuit has certain negative bias voltage, and drive signal positive pulse amplitude and with the change of duty ratio D, do not change, thus the driving that meets the universal switch device require and improve switching device the anti-noise jamming ability, prevent that opening by mistake of switching device is logical.
To achieve these goals, the present invention is achieved by the following technical solutions:
Scheme 1: a kind of device for power switching pulse transformer isolated drive circuit, comprise primary side circuit, pulse transformer Tr and secondary side circuit, described primary side circuit comprises NPN transistor Q
2, PNP transistor Q
3With capacitance C
1, NPN transistor Q
2With PNP transistor Q
3Form the totem amplifying circuit, NPN transistor Q
2Collector electrode with the positive pole of power supply, be connected, NPN transistor Q
2Emitter and PNP transistor Q
3Emitter be connected, and with capacitance C
1An end be connected, PNP transistor Q
3The reference ground of collector electrode and circuit be connected, NPN transistor Q
2Base stage and PNP transistor Q
3Base stage link together, as the input of pwm signal, capacitance C
1The other end with the Same Name of Ends of the first side winding of pulse transformer Tr, be connected, be connected to the different name end of pulse transformer Tr first side winding and the reference of circuit; Described secondary side circuit comprises device for power switching Q
1, drive resistance R
g, grid discharge resistance R
s, diode D
1With building-out capacitor C
2, the Same Name of Ends of pulse transformer Tr secondary side winding and building-out capacitor C
2An end be connected, building-out capacitor C
2The other end and diode D
1Negative electrode be connected, simultaneously also by driving resistance R
gBe connected to device for power switching Q
1Grid, grid discharge resistance R
sBe attempted by device for power switching Q
1Grid and source electrode between;
Described secondary side circuit also comprises voltage-stabiliser tube Z
1With negative pressure, keep capacitor C
3, voltage-stabiliser tube Z
1Anode and diode D
1Anodic bonding, voltage-stabiliser tube Z
1Negative electrode with the different name end of pulse transformer Tr secondary side winding, be connected, and be connected to device for power switching Q
1Source electrode, negative pressure keeps capacitor C
3Be connected in parallel on voltage-stabiliser tube Z
1Two ends.
As a modification of the present invention, scheme 2: a kind of device for power switching pulse transformer isolated drive circuit, comprise primary side circuit, pulse transformer Tr and secondary side circuit, described primary side circuit comprises NPN transistor Q
2, PNP transistor Q
3With capacitance C
1, NPN transistor Q
2With PNP transistor Q
3Form the totem amplifying circuit, NPN transistor Q
2Collector electrode with the positive pole of power supply, be connected, NPN transistor Q
2Emitter and PNP transistor Q
3Emitter be connected, and with capacitance C
1An end be connected, PNP transistor Q
3The reference ground of collector electrode and circuit be connected, NPN transistor Q
2Base stage and PNP transistor Q
3Base stage link together, as the input of pwm signal, capacitance C
1The other end with the Same Name of Ends of the first side winding of pulse transformer Tr, be connected, be connected to the different name end of pulse transformer Tr first side winding and the reference of circuit; Described secondary side circuit comprises device for power switching Q
1, drive resistance R
g, grid discharge resistance R
s, diode D
1With building-out capacitor C
2Building-out capacitor C
2An end and diode D
1Negative electrode be connected, simultaneously also by driving resistance R
gBe connected to device for power switching Q
1Grid, grid discharge resistance R
sBe attempted by device for power switching Q
1Grid and source electrode between;
Described secondary side circuit also comprises voltage-stabiliser tube Z
1With negative pressure, keep capacitor C
3, the secondary side winding N of pulse transformer Tr
2Different name end and building-out capacitor C
2The other end be connected, voltage-stabiliser tube Z
1Anode and diode D
1Anodic bonding, voltage-stabiliser tube Z
1Negative electrode with the Same Name of Ends of pulse transformer Tr secondary side winding, be connected, and be connected to device for power switching Q
1Source electrode, negative pressure keeps capacitor C
3Be connected in parallel on voltage-stabiliser tube Z
1Two ends.
As another kind of improvement the of the present invention, by pulse transformer Tr secondary side, increasing a secondary winding N
3, a negative pressure keep capacitor C
4With a building-out capacitor C
5, a diode D
2With a voltage-stabiliser tube Z
2, a device for power switching Q
4, one drive resistance R
G2With a grid discharge resistance R
S2, formed and had the pulse transformer isolated drive circuit that two-way drives signal, can drive simultaneously two device for power switching; The first secondary winding N of described pulse transformer Tr secondary side
2Same Name of Ends with by negative pressure, kept capacitor C
2, diode D
1, voltage-stabiliser tube Z
1With building-out capacitor C
3The connection of the secondary side circuit formed is identical with the secondary side circuit of scheme 1; The second secondary winding N of described pulse transformer Tr secondary side
3Same Name of Ends with by negative pressure, kept capacitor C
4, diode D
2, voltage-stabiliser tube Z
2With building-out capacitor C
5The connection of another secondary side circuit formed is identical with the secondary side circuit of scheme 2, make pulse transformer isolated drive circuit of the present invention can produce the two-way complementation, the positive pulse constant amplitude, and have the driving signal of the device for power switching of fixing negative bias voltage; Two secondary winding N of described pulse transformer Tr secondary side
2And N
3Consistent with annexation and the described annexation of scheme 1 of two secondary side circuit respectively, make pulse transformer isolated drive circuit of the present invention can produce the two-way homophase, the positive pulse constant amplitude, and the driving signal with device for power switching of fixing negative bias voltage, and two-way drives signal and pwm signal logic homophase.
According to above-mentioned, scheme 3 can be arranged: a kind of pulse transformer isolated drive circuit of device for power switching comprises primary side circuit, pulse transformer Tr, the first secondary side circuit and the second secondary side circuit;
Described primary side circuit comprises NPN transistor Q
2, PNP transistor Q
3, capacitance C
1, NPN transistor Q
2With PNP transistor Q
3Form the totem amplifying circuit, NPN transistor Q
2Collector electrode with the positive pole of power supply, be connected, NPN transistor Q
2Emitter and PNP transistor Q
3Emitter be connected, and with capacitance C
1An end be connected, PNP transistor Q
3The reference ground of collector electrode and primary side circuit be connected, NPN transistor Q
2With PNP transistor Q
3Base stage link together, as the input of pwm signal; The first side winding N of pulse transformer Tr
1Same Name of Ends and capacitance C
1The other end be connected, pulse transformer Tr first side winding N
1The reference ground of different name end and primary side circuit be connected;
Described pulse transformer Tr secondary side winding comprises the first secondary side winding N
2With the second secondary side winding N
3
Described the first secondary side circuit comprises the first building-out capacitor C
2, the first diode D
1, the first voltage-stabiliser tube Z
1, the first negative pressure keeps capacitor C
3, the first device for power switching Q
1, first drive resistance R
G1With first grid discharge resistance R
S1, the first building-out capacitor C
2An end and the first secondary side winding N of pulse transformer Tr
2Same Name of Ends be connected, the first building-out capacitor C
2The other end and the first diode D
1Negative electrode be connected, and drive resistance R by first
G1Be connected to the first device for power switching Q
1Grid, the first diode D
1Anode and the first voltage-stabiliser tube Z
1Anode be connected, the first voltage-stabiliser tube Z
1Negative electrode and the first secondary side winding N of pulse transformer Tr
2The different name end be connected, and be connected to the first device for power switching Q
1Source electrode, the first voltage-stabiliser tube Z
1Two ends the first negative pressure in parallel keeps capacitor C
3, the first device for power switching Q
1The grid source electrode between and meet first grid discharge resistance R
S1
Described the second secondary side circuit comprises the second building-out capacitor C
4, the second diode D
2, the second voltage-stabiliser tube Z
2, the second negative pressure keeps capacitor C
5, the second device for power switching Q
4, second drive resistance R
G2With second grid discharge resistance R
S2, the second building-out capacitor C
4An end and the second secondary side winding N of pulse transformer Tr
3The different name end be connected, the second building-out capacitor C
4The other end and the second diode D
2Negative electrode be connected, and drive resistance R by second
G2Be connected to the second device for power switching Q
4Grid, the second diode D
2Anode and the second voltage-stabiliser tube Z
2Anode be connected, the second voltage-stabiliser tube Z
2Negative electrode and the second secondary side winding N of pulse transformer Tr
3Same Name of Ends be connected, and be connected to the second device for power switching Q
4Source electrode, the second voltage-stabiliser tube Z
2Two ends the second negative pressure in parallel keeps capacitor C
5, the second device for power switching Q
4The grid source electrode between and meet second grid discharge resistance R
S2.
As a kind of improvement of such scheme 3, scheme 4: a kind of pulse transformer isolated drive circuit of device for power switching comprises primary side circuit, pulse transformer Tr, the first secondary side circuit and the second secondary side circuit;
Described primary side circuit comprises NPN transistor Q
2, PNP transistor Q
3, capacitance C
1, NPN transistor Q
2With PNP transistor Q
3Form the totem amplifying circuit, NPN transistor Q
2Collector electrode with the positive pole of power supply, be connected, NPN transistor Q
2Emitter and PNP transistor Q
3Emitter be connected, and with capacitance C
1An end be connected, PNP transistor Q
3The reference ground of collector electrode and primary side circuit be connected, NPN transistor Q
2With PNP transistor Q
3Base stage link together, as the input of pwm signal; The first side winding N of pulse transformer Tr
1Same Name of Ends and capacitance C
1The other end be connected, pulse transformer Tr first side winding N
1The reference ground of different name end and primary side circuit be connected;
Described pulse transformer Tr secondary side winding comprises the first secondary side winding N
2With the second secondary side winding N
3
Described the first secondary side circuit comprises the first building-out capacitor C
2, the first diode D
1, the first voltage-stabiliser tube Z
1, the first negative pressure keeps capacitor C
3, the first device for power switching Q
1, first drive resistance R
G1With first grid discharge resistance R
S1, the first building-out capacitor C
2An end and pulse transformer Tr the first secondary side winding N
2Same Name of Ends be connected, the first building-out capacitor C
2The other end and the first diode D
1Negative electrode be connected, and drive resistance R by first
G1Be connected to the first device for power switching Q
1Grid, the first diode D
1Anode and the first voltage-stabiliser tube Z
1Anode be connected, the first voltage-stabiliser tube Z
1Negative electrode and the first secondary side winding N of pulse transformer Tr
2The different name end be connected, and be connected to the first device for power switching Q
1Source electrode, the first voltage-stabiliser tube Z
1Two ends the first negative pressure in parallel keeps capacitor C
3, the first device for power switching Q
1The grid source electrode between and meet first grid discharge resistance R
S1
Described the second secondary side circuit comprises the second building-out capacitor C
4, the second diode D
2, the second voltage-stabiliser tube Z
2, the second negative pressure keeps capacitor C
5, the second device for power switching Q
4, second drive resistance R
G2With second grid discharge resistance R
S2, the second building-out capacitor C
4An end and the second secondary side winding N of pulse transformer Tr
3Same Name of Ends be connected, the second building-out capacitor C
4The other end and the second diode D
2Negative electrode be connected, and drive resistance R by second
G2Be connected to the second device for power switching Q
4Grid, the second diode D
2Anode and the second voltage-stabiliser tube Z
2Anode be connected, the second voltage-stabiliser tube Z
2Negative electrode and pulse transformer Tr the second secondary side winding N
3The different name end be connected, and be connected to the second device for power switching Q
4Source electrode; The second voltage-stabiliser tube Z
2Two ends the second negative pressure in parallel keeps capacitor C
5, the second device for power switching Q
4The grid source electrode between and meet second grid discharge resistance R
S2.
In scheme 1, the device for power switching Q that described pulse transformer isolated drive circuit produces
1Driving signal and pwm signal logic homophase, diode D
1With building-out capacitor C
2For compensating capacitance C
1The voltage drop of the driving voltage caused, and keep driving voltage constant, voltage-stabiliser tube Z
1With negative pressure, keep capacitor C
3For device for power switching Q
1Blocking interval produces fixing negative bias voltage, improves device for power switching Q with this
1Antijamming capability, prevent that it from opening by mistake logical.
In scheme 2, the secondary side winding N of described pulse transformer Tr
2Same Name of Ends and the secondary side winding N of the pulse transformer Tr in such scheme 1
2Same Name of Ends opposite, i.e. the secondary side winding N of pulse transformer Tr
2Different name end and building-out capacitor C
2An end be connected, the secondary side winding N of pulse transformer Tr
2Same Name of Ends and voltage-stabiliser tube Z
1Negative electrode be connected, the device for power switching Q that the pulse transformer isolated drive circuit produces
1Driving signal and pwm signal logical inversion, the driving signal positive pulse constant amplitude of the device for power switching Q1 of generation, and have fixing negative bias voltage.
In scheme 3, the first secondary side winding N of described pulse transformer
2Identical with scheme 1 with the connection of the first secondary side circuit, the second secondary side winding N of pulse transformer
3Identical with scheme 2 with the connection of the second secondary side circuit, can produce logical complement, positive pulse constant amplitude like this, and have the two-way driving signal of fixing negative bias voltage, drive simultaneously the first device for power switching Q
1With the second device for power switching Q
4Two device for power switching.
In scheme 4, two secondary winding N of described pulse transformer Tr secondary side
2And N
3Consistent with annexation and the described annexation of scheme 1 of two secondary side circuit respectively, make pulse transformer isolated drive circuit of the present invention can produce the two-way homophase, the positive pulse constant amplitude, and the driving signal with device for power switching of fixing negative bias voltage, and two-way drives signal and pwm signal logic homophase, drives simultaneously the first device for power switching Q
1With the second device for power switching Q
4Two device for power switching.
Owing to adopting technique scheme, a kind of device for power switching pulse transformer isolated drive circuit provided by the invention has such beneficial effect:
The pulse transformer isolation drive does not need extra driving power, after adding building-out capacitor, voltage-stabiliser tube and negative pressure to keep electric capacity, can produce the pulse drive signal of the negative bias voltage with certain amplitude, improved the anti-noise jamming ability of device for power switching, and can also guarantee to drive signal positive pulse voltage magnitude and with change in duty cycle, do not change, widened the range of application of pulse transformer isolation drive.
Pulse transformer isolated drive circuit of the present invention can be applied to booster converter, buck converter, forward converter, anti exciting converter and half-bridge, full-bridge and recommend etc. in all switch converters, and can effectively improve the reliability of switch converters.
The accompanying drawing explanation
Fig. 1 is the first pulse transformer isolated drive circuit;
Fig. 2 is the groundwork waveform of circuit shown in Figure 1;
Fig. 3 is the second pulse transformer isolated drive circuit;
Fig. 4 is the groundwork waveform of circuit shown in Figure 3;
Fig. 5 is device for power switching pulse transformer isolated drive circuit of the present invention;
Fig. 6 is the groundwork waveform of drive circuit of the present invention;
Fig. 7 is the device for power switching pulse transformer isolated drive circuit with antilogical output of the present invention;
Fig. 8 is the groundwork waveform with antilogical output driving circuit of the present invention;
Fig. 9 is the device for power switching pulse transformer isolated drive circuit that the two-way logical complement drives signal that has of the present invention;
Figure 10 is the device for power switching pulse transformer isolated drive circuit with two-way logic driven in phase signal of the present invention.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the present invention is described in further detail:
A kind of device for power switching pulse transformer isolated drive circuit, as shown in Figure 5, it comprises NPN transistor Q
2, PNP transistor Q
3, capacitance C
1, pulse transformer Tr, device for power switching Q
1, drive resistance R
g, grid discharge resistance R
s, diode D
1With building-out capacitor C
2, NPN transistor Q
2With PNP transistor Q
3Form the totem amplifying circuit, NPN transistor Q
2Collector electrode with the positive pole of power supply, be connected, NPN transistor Q
2Emitter and PNP transistor Q
3Emitter be connected, and be connected with an end of capacitance, PNP transistor Q
3The reference ground of collector electrode and circuit be connected, NPN transistor Q
2Base stage and PNP transistor Q
3Base stage link together, as the input of pwm signal, capacitance C
1The other end with the Same Name of Ends of the first side winding of pulse transformer Tr, be connected, be connected to the different name end of pulse transformer Tr first side winding and the reference of circuit, the Same Name of Ends of pulse transformer Tr secondary side winding and building-out capacitor C
2An end be connected, building-out capacitor C
2The other end with the negative electrode of diode, be connected, and by driving resistance R
gBe connected to device for power switching Q
1Grid, grid discharge resistance R
sAnd meet device for power switching Q
1Grid and source electrode between;
Also comprise voltage-stabiliser tube Z
1With negative pressure, keep capacitor C
3, voltage-stabiliser tube Z
1Anode and diode D
1Anodic bonding, voltage-stabiliser tube Z
1Negative electrode with the non-same polarity of pulse transformer Tr secondary side winding, be connected, and be connected to device for power switching Q
1Source electrode, negative pressure keeps capacitor C
3Be connected in parallel on voltage-stabiliser tube Z
1Two ends.
Shown in Figure 6 is the groundwork waveform of circuit of the present invention, is the pwm signal waveform shown in Fig. 6 (a), and amplitude is Vcc, and duty ratio is D; Shown in Fig. 6 (b), be capacitance C
1Voltage waveform, consider that the capacity of capacitance is enough large, ignore its mains ripple, ignore transistor Q
2And Q
3Tube voltage drop, as can be known according to the weber equilibrium principle of transformer, the voltage Vc of capacitance
1Equal DVcc; Shown in Fig. 6 (c), be building-out capacitor C
2Voltage waveform, shown in Fig. 6 (d), be voltage-stabiliser tube Z
1With filter capacitor C
3Voltage waveform (wherein Vz is voltage-stabiliser tube Z
1Reverse breakdown voltage), shown in Fig. 6 (e), be device for power switching Q
1The gate drive voltage waveform.When pwm signal is timing, NPN transistor Q
2Conducting, Vcc has been added in capacitance C
1With transformer Tr first side winding N
1Series arm on, N
1The voltage of Motor Winding Same Name of Ends is Vcc-Vc
1=(1-D) Vcc, Circuit Fault on Secondary Transformer winding N
2The induced voltage at two ends is n (1-D) Vcc(Same Name of Ends for just), diode D
1Bear back-pressure and turn-off, now, be applied to power transistor Q
1Positive drive voltage between the grid source electrode is n (1-D) Vcc+Vc
2When pwm signal during by positive vanishing, PNP transistor Q
3Conducting, capacitance C
1The voltage Vc at two ends
1Be applied to transformer first side winding N
1Upper, N
1Motor Winding Same Name of Ends voltage is-the DVcc(Same Name of Ends is for negative), Circuit Fault on Secondary Transformer winding N
2The induced voltage at two ends is-the nDVcc(Same Name of Ends is for negative), diode D
1Bear forward voltage and conducting, now, the energy of capacitance is transferred to secondary side by transformer, and the loop that secondary side forms is: Circuit Fault on Secondary Transformer winding N
2Different name end, voltage-stabiliser tube Z
1With negative pressure, keep capacitor C
3Parallel branch, diode D
1, building-out capacitor C
2, N
2The Same Name of Ends of winding, C
2With C
3The voltage sum Vc at two ends
2+ Vc
3=nDVcc, during stable state, Vc
3The voltage at two ends equals voltage-stabiliser tube Z
1Reverse breakdown voltage Vz, C so
2The voltage Vc at two ends
2=nDVcc-Vz, make device for power switching Q thus
1Between the grid source electrode, bear negative bias voltage, its amplitude is Vz, by the analysis of front device for power switching Q as can be known
1Forward voltage between the grid source electrode equals n (1-D) Vcc+Vc
2=nVcc-Vz, the reverse breakdown voltage Vz that changes voltage-stabiliser tube can change direct impulse amplitude and the negative bias voltage amplitude that drives signal, device for power switching Q
1Drive waveforms complete between the grid source electrode is as shown in Fig. 6 (e).
Shown in Figure 7 is the pulse transformer isolated drive circuit with antilogical of the present invention, and it only is that with the difference of Fig. 5 the Same Name of Ends of pulse transformer is opposite, thereby produces the driving signal of the device for power switching opposite with the pwm signal logic.
Shown in Figure 8 is the groundwork waveform of Fig. 7 circuit, is the pwm signal waveform shown in Fig. 8 (a), and amplitude is Vcc, and duty ratio is D; Shown in Fig. 8 (b), be device for power switching Q
1Drive waveforms between the grid source electrode, its logical AND pwm signal is anti-phase, and the positive pulse voltage magnitude is still nVcc-Vz, and the negative bias voltage amplitude is Vz.
Shown in Figure 9 is one of the expansion circuit of device for power switching pulse transformer isolated drive circuit of the present invention, device for power switching pulse transformer isolated drive circuit with two-way logical complement driving signal, it consists of primary side circuit, pulse transformer Tr and two secondary side circuit, and the primary side circuit comprises NPN transistor Q
2, PNP transistor Q
3With capacitance C
1Pulse transformer Tr has first side winding N
1, the first secondary side winding N
2With the second secondary side winding N
3The first secondary side circuit comprises the first diode D
1, the first building-out capacitor C
2, the first voltage-stabiliser tube Z
1, the first negative pressure keeps capacitor C
3, first drive resistance R
G1, first grid discharge resistance R
S1With the first device for power switching Q
1The second secondary side circuit comprises the second diode D
2, the second building-out capacitor C
4, the second voltage-stabiliser tube Z
2, the second negative pressure keeps capacitor C
5, second drive resistance R
G2, second grid discharge resistance R
S2With the second device for power switching Q
4Primary side circuit and annexation thereof and primary side circuit shown in Figure 5 are identical; The first secondary side winding N
2Identical with the annexation of the annexation of the first secondary side circuit and secondary side circuit shown in Figure 5; The second secondary side winding N
3Identical with the annexation of the annexation of the second secondary side circuit and secondary side circuit shown in Figure 7, the power device that can produce the two-way logical complement drives signal, drives simultaneously two device for power switching.This circuit can need for asymmetrical half-bridge converter or Properties of Active Clamp Forward Converters the drive circuit of two switching devices of complementary logic.
Shown in Figure 10 be device for power switching pulse transformer isolated drive circuit of the present invention the expansion circuit two, device for power switching pulse transformer isolated drive circuit with two-way logic driven in phase signal, it is that the annexation of two secondary side circuit and pulse transformer secondary side winding is all identical with the annexation of secondary side circuit shown in Figure 5 with the difference of circuit shown in Figure 9, the two-way that can produce the logic homophase drives signal, and with input pwm signal homophase, can be for the driving of two-transistor forward converter and identical two switching devices of full-bridge converter control logic.
By the analysis to device for power switching isolated drive circuit of the present invention, can sum up circuit has following characteristics: this drive circuit adopts pulse transformer to realize the transmission of electrical isolation and driving signal, has saved a road isolation drive power supply; The negative bias voltage that the driving signal that device for power switching obtains has constant amplitude, improved the reliability that device for power switching turn-offs; The voltage magnitude of the forward drive signal that device for power switching obtains does not change with the variation of duty ratio, has widened pulse transformer and has driven the scope of applying.The present invention is mainly used in the drive circuit of device for power switching in power inverter.
Claims (4)
1. a device for power switching pulse transformer isolated drive circuit, comprise primary side circuit, pulse transformer Tr and secondary side circuit, and described primary side circuit comprises NPN transistor Q
2, PNP transistor Q
3With capacitance C
1, NPN transistor Q
2With PNP transistor Q
3Form the totem amplifying circuit, NPN transistor Q
2Collector electrode with the positive pole of power supply, be connected, NPN transistor Q
2Emitter and PNP transistor Q
3Emitter be connected, and with capacitance C
1An end be connected, PNP transistor Q
3The reference ground of collector electrode and circuit be connected, NPN transistor Q
2Base stage and PNP transistor Q
3Base stage link together, as the input of pwm signal, capacitance C
1The other end with the Same Name of Ends of the first side winding of pulse transformer Tr, be connected, be connected to the different name end of pulse transformer Tr first side winding and the reference of circuit; Described secondary side circuit comprises device for power switching Q
1, drive resistance R
g, grid discharge resistance R
s, diode D
1With building-out capacitor C
2, the Same Name of Ends of pulse transformer Tr secondary side winding and building-out capacitor C
2An end be connected, building-out capacitor C
2The other end and diode D
1Negative electrode be connected, simultaneously also by driving resistance R
gBe connected to device for power switching Q
1Grid, grid discharge resistance R
sBe attempted by device for power switching Q
1Grid and source electrode between; It is characterized in that:
Described secondary side circuit also comprises voltage-stabiliser tube Z
1With negative pressure, keep capacitor C
3, voltage-stabiliser tube Z
1Anode and diode D
1Anodic bonding, voltage-stabiliser tube Z
1Negative electrode with the different name end of pulse transformer Tr secondary side winding, be connected, and be connected to device for power switching Q
1Source electrode, negative pressure keeps capacitor C
3Be connected in parallel on voltage-stabiliser tube Z
1Two ends.
2. a device for power switching pulse transformer isolated drive circuit, comprise primary side circuit, pulse transformer Tr and secondary side circuit, and described primary side circuit comprises NPN transistor Q
2, PNP transistor Q
3With capacitance C
1, NPN transistor Q
2With PNP transistor Q
3Form the totem amplifying circuit, NPN transistor Q
2Collector electrode with the positive pole of power supply, be connected, NPN transistor Q
2Emitter and PNP transistor Q
3Emitter be connected, and with capacitance C
1An end be connected, PNP transistor Q
3The reference ground of collector electrode and circuit be connected, NPN transistor Q
2Base stage and PNP transistor Q
3Base stage link together, as the input of pwm signal, capacitance C
1The other end with the Same Name of Ends of the first side winding of pulse transformer Tr, be connected, be connected to the different name end of pulse transformer Tr first side winding and the reference of circuit; Described secondary side circuit comprises device for power switching Q
1, drive resistance R
g, grid discharge resistance R
s, diode D
1With building-out capacitor C
2Building-out capacitor C
2An end and diode D
1Negative electrode be connected, simultaneously also by driving resistance R
gBe connected to device for power switching Q
1Grid, grid discharge resistance R
sBe attempted by device for power switching Q
1Grid and source electrode between; It is characterized in that:
Described secondary side circuit also comprises voltage-stabiliser tube Z
1With negative pressure, keep capacitor C
3, the secondary side winding N of pulse transformer Tr
2Different name end and building-out capacitor C
2The other end be connected, voltage-stabiliser tube Z
1Anode and diode D
1Anodic bonding, voltage-stabiliser tube Z
1Negative electrode with the Same Name of Ends of pulse transformer Tr secondary side winding, be connected, and be connected to device for power switching Q
1Source electrode, negative pressure keeps capacitor C
3Be connected in parallel on voltage-stabiliser tube Z
1Two ends.
3. the pulse transformer isolated drive circuit of a device for power switching, comprise primary side circuit, pulse transformer Tr, the first secondary side circuit and the second secondary side circuit;
Described primary side circuit comprises NPN transistor Q
2, PNP transistor Q
3, capacitance C
1, NPN transistor Q
2With PNP transistor Q
3Form the totem amplifying circuit, NPN transistor Q
2Collector electrode with the positive pole of power supply, be connected, NPN transistor Q
2Emitter and PNP transistor Q
3Emitter be connected, and with capacitance C
1An end be connected, PNP transistor Q
3The reference ground of collector electrode and primary side circuit be connected, NPN transistor Q
2With PNP transistor Q
3Base stage link together, as the input of pwm signal; The first side winding N of pulse transformer Tr
1Same Name of Ends and capacitance C
1The other end be connected, pulse transformer Tr first side winding N
1The reference ground of different name end and primary side circuit be connected; It is characterized in that:
Described pulse transformer Tr secondary side winding comprises the first secondary side winding N
2With the second secondary side winding N
3
Described the first secondary side circuit comprises the first building-out capacitor C
2, the first diode D
1, the first voltage-stabiliser tube Z
1, the first negative pressure keeps capacitor C
3, the first device for power switching Q
1, first drive resistance R
G1With first grid discharge resistance R
S1, the first building-out capacitor C
2An end and the first secondary side winding N of pulse transformer Tr
2Same Name of Ends be connected, the first building-out capacitor C
2The other end and the first diode D
1Negative electrode be connected, and drive resistance R by first
G1Be connected to the first device for power switching Q
1Grid, the first diode D
1Anode and the first voltage-stabiliser tube Z
1Anode be connected, the first voltage-stabiliser tube Z
1Negative electrode and the first secondary side winding N of pulse transformer Tr
2The different name end be connected, and be connected to the first device for power switching Q
1Source electrode, the first voltage-stabiliser tube Z
1Two ends the first negative pressure in parallel keeps capacitor C
3, the first device for power switching Q
1The grid source electrode between and meet first grid discharge resistance R
S1
Described the second secondary side circuit comprises the second building-out capacitor C
4, the second diode D
2, the second voltage-stabiliser tube Z
2, the second negative pressure keeps capacitor C
5, the second device for power switching Q
4, second drive resistance R
G2With second grid discharge resistance R
S2, the second building-out capacitor C
4An end and the second secondary side winding N of pulse transformer Tr
3The different name end be connected, the second building-out capacitor C
4The other end and the second diode D
2Negative electrode be connected, and drive resistance R by second
G2Be connected to the second device for power switching Q
4Grid, the second diode D
2Anode and the second voltage-stabiliser tube Z
2Anode be connected, the second voltage-stabiliser tube Z
2Negative electrode and the second secondary side winding N of pulse transformer Tr
3Same Name of Ends be connected, and be connected to the second device for power switching Q
4Source electrode, the second voltage-stabiliser tube Z
2Two ends the second negative pressure in parallel keeps capacitor C
5, the second device for power switching Q
4The grid source electrode between and meet second grid discharge resistance R
S2.
4. the pulse transformer isolated drive circuit of a device for power switching, comprise primary side circuit, pulse transformer Tr, the first secondary side circuit and the second secondary side circuit;
Described primary side circuit comprises NPN transistor Q
2, PNP transistor Q
3, capacitance C
1, NPN transistor Q
2With PNP transistor Q
3Form the totem amplifying circuit, NPN transistor Q
2Collector electrode with the positive pole of power supply, be connected, NPN transistor Q
2Emitter and PNP transistor Q
3Emitter be connected, and with capacitance C
1An end be connected, PNP transistor Q
3The reference ground of collector electrode and primary side circuit be connected, NPN transistor Q
2With PNP transistor Q
3Base stage link together, as the input of pwm signal; The first side winding N of pulse transformer Tr
1Same Name of Ends and capacitance C
1The other end be connected, pulse transformer Tr first side winding N
1The reference ground of different name end and primary side circuit be connected; It is characterized in that:
Described pulse transformer Tr secondary side winding comprises the first secondary side winding N
2With the second secondary side winding N
3
Described the first secondary side circuit comprises the first building-out capacitor C
2, the first diode D
1, the first voltage-stabiliser tube Z
1, the first negative pressure keeps capacitor C
3, the first device for power switching Q
1, first drive resistance R
G1With first grid discharge resistance R
S1, the first building-out capacitor C
2An end and pulse transformer Tr the first secondary side winding N
2Same Name of Ends be connected, the first building-out capacitor C
2The other end and the first diode D
1Negative electrode be connected, and drive resistance R by first
G1Be connected to the first device for power switching Q
1Grid, the first diode D
1Anode and the first voltage-stabiliser tube Z
1Anode be connected, the first voltage-stabiliser tube Z
1Negative electrode and the first secondary side winding N of pulse transformer Tr
2The different name end be connected, and be connected to the first device for power switching Q
1Source electrode, the first voltage-stabiliser tube Z
1Two ends the first negative pressure in parallel keeps capacitor C
3, the first device for power switching Q
1The grid source electrode between and meet first grid discharge resistance R
S1
Described the second secondary side circuit comprises the second building-out capacitor C
4, the second diode D
2, the second voltage-stabiliser tube Z
2, the second negative pressure keeps capacitor C
5, the second device for power switching Q
4, second drive resistance R
G2With second grid discharge resistance R
S2, the second building-out capacitor C
4An end and the second secondary side winding N of pulse transformer Tr
3Same Name of Ends be connected, the second building-out capacitor C
4The other end and the second diode D
2Negative electrode be connected, and drive resistance R by second
G2Be connected to the second device for power switching Q
4Grid, the second diode D
2Anode and the second voltage-stabiliser tube Z
2Anode be connected, the second voltage-stabiliser tube Z
2Negative electrode and pulse transformer Tr the second secondary side winding N
3The different name end be connected, and be connected to the second device for power switching Q
4Source electrode; The second voltage-stabiliser tube Z
2Two ends the second negative pressure in parallel keeps capacitor C
5, the second device for power switching Q
4The grid source electrode between and meet second grid discharge resistance R
S2.
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|---|---|---|---|
| CN201310298067.3A CN103414354B (en) | 2013-07-16 | 2013-07-16 | Device for power switching pulse transformer isolated drive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310298067.3A CN103414354B (en) | 2013-07-16 | 2013-07-16 | Device for power switching pulse transformer isolated drive circuit |
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| Publication Number | Publication Date |
|---|---|
| CN103414354A true CN103414354A (en) | 2013-11-27 |
| CN103414354B CN103414354B (en) | 2015-08-05 |
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|---|---|---|---|
| CN201310298067.3A Expired - Fee Related CN103414354B (en) | 2013-07-16 | 2013-07-16 | Device for power switching pulse transformer isolated drive circuit |
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| CN103795229A (en) * | 2014-01-26 | 2014-05-14 | 广州视源电子科技股份有限公司 | Drive circuit of two-transistor forward synchronous rectification circuit |
| CN103825436A (en) * | 2014-03-18 | 2014-05-28 | 无锡研奥电子科技有限公司 | High-speed large-current power field-effect transistor driving circuit |
| CN104076714A (en) * | 2014-07-04 | 2014-10-01 | 东莞市华宜新能源科技有限公司 | MCU anti-logic control circuit and half-bridge control circuit provided with MCU anti-logic control circuit |
| CN104202027A (en) * | 2014-09-23 | 2014-12-10 | 中国电子科技集团公司第十四研究所 | High-power IGBT (insulated gate bipolar transistor) driver |
| CN104601027A (en) * | 2015-01-12 | 2015-05-06 | 南京亚派科技股份有限公司 | Tandem double flyback quasi resonant converter suitable for neutral point clamped direct current bus |
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| CN105449997A (en) * | 2016-01-20 | 2016-03-30 | 东南大学 | A power switch tube isolated gate drive circuit for a power converter |
| CN105610307A (en) * | 2016-03-03 | 2016-05-25 | 东南大学 | Isolation gate driving circuit capable of generating fixed negative voltage for power switching transistor |
| CN105743331A (en) * | 2016-04-14 | 2016-07-06 | 西安许继电力电子技术有限公司 | Switching tube driving circuit for dual-tube flyback topological switch power supply |
| CN105915027A (en) * | 2016-04-17 | 2016-08-31 | 合肥博雷电气有限公司 | High-power high-frequency high-voltage switch transformer |
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| CN110930836A (en) * | 2019-11-18 | 2020-03-27 | 湖北工程学院 | Power electronic technology teaching experimental instrument |
| CN111614239A (en) * | 2020-05-29 | 2020-09-01 | 科华恒盛股份有限公司 | Transformer driving circuit |
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| CN103795229A (en) * | 2014-01-26 | 2014-05-14 | 广州视源电子科技股份有限公司 | Drive circuit of two-transistor forward synchronous rectification circuit |
| CN103795229B (en) * | 2014-01-26 | 2016-09-14 | 广州视源电子科技股份有限公司 | The drive circuit of double tube positive exciting circuit of synchronous rectification |
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| CN103825436A (en) * | 2014-03-18 | 2014-05-28 | 无锡研奥电子科技有限公司 | High-speed large-current power field-effect transistor driving circuit |
| CN104076714A (en) * | 2014-07-04 | 2014-10-01 | 东莞市华宜新能源科技有限公司 | MCU anti-logic control circuit and half-bridge control circuit provided with MCU anti-logic control circuit |
| CN104202027A (en) * | 2014-09-23 | 2014-12-10 | 中国电子科技集团公司第十四研究所 | High-power IGBT (insulated gate bipolar transistor) driver |
| CN104601027A (en) * | 2015-01-12 | 2015-05-06 | 南京亚派科技股份有限公司 | Tandem double flyback quasi resonant converter suitable for neutral point clamped direct current bus |
| CN104730302B (en) * | 2015-04-20 | 2017-07-14 | 乐雷光电技术（上海）有限公司 | One kind prevents aircraft bombing circuit |
| CN104730302A (en) * | 2015-04-20 | 2015-06-24 | 乐雷光电技术（上海）有限公司 | Anti-explosion circuit |
| CN105305831A (en) * | 2015-10-12 | 2016-02-03 | 东南大学 | Bridge type converter single-path signal gate driving circuit using isolation transformer |
| CN105305831B (en) * | 2015-10-12 | 2017-08-25 | 东南大学 | A kind of bridge converter one-channel signal gate drive circuit of use isolating transformer |
| CN105449997A (en) * | 2016-01-20 | 2016-03-30 | 东南大学 | A power switch tube isolated gate drive circuit for a power converter |
| CN105610307A (en) * | 2016-03-03 | 2016-05-25 | 东南大学 | Isolation gate driving circuit capable of generating fixed negative voltage for power switching transistor |
| CN105743331A (en) * | 2016-04-14 | 2016-07-06 | 西安许继电力电子技术有限公司 | Switching tube driving circuit for dual-tube flyback topological switch power supply |
| CN105915027A (en) * | 2016-04-17 | 2016-08-31 | 合肥博雷电气有限公司 | High-power high-frequency high-voltage switch transformer |
| CN107800293A (en) * | 2016-08-29 | 2018-03-13 | 丰郅(上海)新能源科技有限公司 | A kind of drive circuit and the photovoltaic power optimization system using the drive circuit |
| CN107800293B (en) * | 2016-08-29 | 2020-09-08 | 丰郅(上海)新能源科技有限公司 | Drive circuit and photovoltaic power optimization system adopting same |
| CN108508250A (en) * | 2017-02-26 | 2018-09-07 | 武汉市欧睿科技有限公司 | A kind of precision isolated form Intelligent transformator |
| CN106877675A (en) * | 2017-03-30 | 2017-06-20 | 北京精密机电控制设备研究所 | A kind of normal shock switching power circuit two-tube in parallel of wide range input |
| CN109980903A (en) * | 2017-12-28 | 2019-07-05 | 中兴通讯股份有限公司 | A kind of driving circuit and power supply |
| CN109980903B (en) * | 2017-12-28 | 2021-08-17 | 中兴通讯股份有限公司 | Drive circuit and power supply |
| CN109347328A (en) * | 2018-10-30 | 2019-02-15 | 北京卫星制造厂有限公司 | A kind of Magnetic isolation high frequency drive circuit |
| CN110930836A (en) * | 2019-11-18 | 2020-03-27 | 湖北工程学院 | Power electronic technology teaching experimental instrument |
| CN111614239A (en) * | 2020-05-29 | 2020-09-01 | 科华恒盛股份有限公司 | Transformer driving circuit |
| CN111614239B (en) * | 2020-05-29 | 2022-06-07 | 科华恒盛股份有限公司 | Transformer driving circuit |
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