CN203933600U - A kind of electromagnetic coupled formula high-power drive circuit - Google Patents
A kind of electromagnetic coupled formula high-power drive circuit Download PDFInfo
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- CN203933600U CN203933600U CN201420348305.7U CN201420348305U CN203933600U CN 203933600 U CN203933600 U CN 203933600U CN 201420348305 U CN201420348305 U CN 201420348305U CN 203933600 U CN203933600 U CN 203933600U
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Abstract
The utility model discloses a kind of electromagnetic coupled formula high-power drive circuit, comprise generation phase-shifting full-bridge pulse signal generating circuit for pulse signal, for pulse signal isolate amplifying signal isolating amplifier circuit, for again isolating and the IGBT drive circuit that drives signal being provided, wherein said signal isolating amplifier circuit is comprised of high speed gate-drive chip, the first pulse transformer, two half-bridge circuits, and described phase-shifting full-bridge pulse signal generating circuit is connected with high speed gate-drive chip; Described high speed gate-drive chip is connected with the first pulse transformer; Described the first pulse transformer is connected with two half-bridge circuits respectively; Described two half-bridge circuits are connected with IGBT drive circuit respectively; Described IGBT drive circuit is connected with IGBT in circuit to be driven.The utility model has been realized the electrical isolation of control circuit and power circuit high voltage magnitude, has realized again the high speed of signal, effectively transmission, and convenient expansion power output, effectively suppresses electromagnetic interference.
Description
Technical field
The utility model relates to a kind of electromagnetic coupled formula high-power drive circuit, belongs to the technical field of phase-shift type field of switch power.
Background technology
Along with the develop rapidly of power electronic technology, the application of IGBT is increasingly extensive, and the switching characteristic that the design of drive circuit will make IGBT have also will guarantee that IGBT works safely and reliably simultaneously.
The deficiency of at present conventional integrated drive electronics is: independent float power need to be provided, use inconvenient; The isolation of employing photoelectricity, operating frequency low (being generally no more than 40kHz); Need external many resolution elements, expensive etc.
Adopt pulse transformer isolation can improve isolation voltage tolerance, cost aspect is relatively low again simultaneously, reliability is high, transmission delay is little, inhibition ability to common-mode signal is strong, can realize higher switching frequency, not have aging problem, therefore adopt pulse transformer to complete and drive the isolation transmission of signal to there is certain advantage as isolated component.At present common pulse transformer isolation transmission pulse aspect is that a pair of polarity is contrary, 180 ° of phase phasic differences and the pulse signal complete coupling that has a Dead Time are to secondary rear drive IGBT, the generation in IGBT brachium pontis dead band forms driving voltage clamper by increasing auxiliary circuit in primary, or by additional delay circuit, will drive signal lag to meet dead band requirement at transformer secondary output, or adopt the method for modulation drive pulse signal, its rising edge and trailing edge are converted to two homophases or anti-phase narrow pulse signal, pulse transformer is just coupled to secondary by these two pulse signals, again by the method reduction drive pulse signal of secondary demodulation reconstruct.There is circuit complexity, poor reliability, be difficult to flexible Application in the occasion of a plurality of modular power combination in any in said method.
Summary of the invention
Technical problem to be solved in the utility model is to overcome the deficiencies in the prior art, a kind of electromagnetic coupled formula high-power drive circuit is provided, signal pulse is by the high speed gate-drive chip of signal isolating amplifier circuit, pulse transformer, half-bridge circuit isolation is amplified, both realized the electrical isolation of control circuit and power circuit high voltage magnitude, adopted this passive drive mode of pulse transformer, in drive circuit, do not need the float power that provides again independent, can drive flexibly the main power device of the Switching Power Supply of a plurality of synchronous workings, meet the needs of power moduleization combination.
The utility model specifically solves the problems of the technologies described above by the following technical solutions:
A kind of electromagnetic coupled formula high-power drive circuit, comprise generation phase-shifting full-bridge pulse signal generating circuit for pulse signal, for pulse signal isolate amplifying signal isolating amplifier circuit, for again isolating and provide the IGBT drive circuit of drive pulse signal, wherein said signal isolating amplifier circuit is comprised of high speed gate-drive chip, the first pulse transformer, two half-bridge circuits, and described phase-shifting full-bridge pulse signal generating circuit is connected with high speed gate-drive chip; Described high speed gate-drive chip is connected with the first pulse transformer; Described the first pulse transformer is connected with two half-bridge circuits respectively; Described two half-bridge circuits are connected with IGBT drive circuit respectively; Described IGBT drive circuit is connected with the IGBT of circuit to be driven.The pulse signal that described phase-shifting full-bridge pulse signal generating circuit produces is undertaken after first order amplification by high speed gate-drive chip, is become the two-way drive pulse signal of single spin-echo by the first pulse transformer isolated variable; The two-way drive pulse signal of described single spin-echo after two half-bridge circuits amplify again, is isolated by IGBT drive circuit respectively again, until isolation output within the scope of the voltage magnitude at IGBT place in circuit to be driven time.
Further, as a kind of optimal technical scheme of the present utility model: described signal isolating amplifier circuit is specially: comprise the first resistance, the second resistance, the 3rd resistance, the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance, the 8th resistance, the first electric capacity, the second electric capacity, capacitance, the 4th electric capacity, the 5th electric capacity, high speed gate-drive chip, the first pulse transformer, the first voltage-stabiliser tube, the second voltage-stabiliser tube, the 3rd voltage-stabiliser tube, the 4th voltage-stabiliser tube, the first switching tube, second switch pipe, wherein said the first pulse transformer comprises input and the first output, the second output, described input, the first output and the second output include first end and the second end, the anode of described pulse signal is connected with the input of high speed gate-drive chip by the first resistance, the negativing ending grounding of described pulse signal, the parallel circuits that is connected the second resistance and the first electric capacity between the input of described high speed gate-drive chip and ground, between the power end of described high speed gate-drive chip and ground, be connected the second electric capacity, the output of described high speed gate-drive chip is connected with the first end of the input of the first pulse transformer by capacitance, the second end ground connection of the input of described the first pulse transformer, the first end of the first output of described the first pulse transformer connects the E utmost point of the first switching tube, and the second end of first pulse transformer the first output connects the G utmost point of the first switching tube by the 3rd resistance, described the first voltage-stabiliser tube is in parallel with the 3rd resistance, and the negative electrode of the first voltage-stabiliser tube is connected with the second end of first pulse transformer the first output, described the 3rd voltage-stabiliser tube and the 5th resistance are connected in parallel on the E utmost point and the G utmost point of the first switching tube, the C utmost point of described the first switching tube is connected to positive supply, the first end of described first pulse transformer the second output connects the G utmost point of second switch pipe by the 4th resistance, the second end of first pulse transformer the second output connects the E utmost point of second switch pipe, described the second voltage-stabiliser tube is in parallel with the 4th resistance, and the negative electrode of described the second voltage-stabiliser tube is connected with the first end of first pulse transformer the second output, described the 4th voltage-stabiliser tube, the 6th resistance are connected in parallel on the E utmost point and the G utmost point of the second voltage-stabiliser tube, the anode of described the 4th electric capacity connects positive supply, and the negative terminal of the 4th electric capacity connects the anode of the 5th electric capacity, described the 7th resistance and the 4th Capacitance parallel connection, the negative terminal of described the 5th electric capacity connects negative supply, the 8th resistance and the 5th Capacitance parallel connection, and the E utmost point of the first switching tube is extremely connected with the C of second switch pipe, the anode that the negative terminal of the 4th electric capacity is output pulse signal, the C of second switch pipe is the negative terminal of output pulse signal very.
Further, as a kind of optimal technical scheme of the present utility model: described IGBT drive circuit comprises the second pulse transformer, the tenth resistance, the 11 resistance, the anode of wherein said signal isolating amplifier circuit output pulse signal is connected with one end of the second pulse transformer input, and the negative terminal of described signal isolating amplifier circuit output pulse signal is connected with the other end of the second pulse transformer input; One end of described the second pulse transformer output connects the G utmost point of IGBT pipe to be driven by the tenth resistance, the other end of the second pulse transformer output connects the E utmost point of IGBT pipe to be driven; Described the 11 resistance is connected in parallel between the G utmost point and the E utmost point of IGBT in circuit to be driven.
Further, as a kind of optimal technical scheme of the present utility model: described IGBT drive circuit also comprises current-limiting resistance, and the anode of described signal isolating amplifier circuit output pulse signal is connected with one end of the second pulse transformer input by current-limiting resistance.
Further, as a kind of optimal technical scheme of the present utility model: described IGBT drive circuit also comprises that described the 5th voltage-stabiliser tube is connected in parallel between the G utmost point and the E utmost point of IGBT in circuit to be driven for limiting the 5th voltage-stabiliser tube of the drive pulse signal amplitude of output.
Further, as a kind of optimal technical scheme of the present utility model: described IGBT drive circuit is comprised of the IGBT drive circuit of some groups of parallel connections.
Further, as a kind of optimal technical scheme of the present utility model: the output of described phase-shifting full-bridge pulse signal generating circuit comprises the synchronization pulse of four groups of electrical isolation.
The utility model adopts technique scheme, can produce following technique effect:
(1) electromagnetic coupled formula high-power drive circuit of the present utility model, in system, the phase shifting control of all synchronous working power supplys has been concentrated at phase-shifting full-bridge pulse signal generating circuit, pulse signal is by the high speed gate-drive chip of signal isolating amplifier circuit, pulse transformer, half-bridge circuit isolation is amplified, pulse signal has passed through above-mentioned two-stage isolation and has amplified, can effectively suppress common mode disturbances, significantly improve the isolation voltage tolerance of signal, both realized the electrical isolation of control circuit and power circuit high voltage magnitude, realized again the high speed of signal, effectively transmission, transmission delay is little, inhibition ability to common-mode signal is strong, can realize higher switching frequency (tens kHz).In circuit, anti-interference process is taked in many places, and global design is simple and practical, reliable and stable.
(2) pulse transformer is applied to electromagnetic coupled formula high-power drive circuit of the present invention, innovation ground application electromagnetic coupled mode is independently transmitted some roads drive pulse signal highly-reliable transmission and the isolation of high voltage tolerance that has realized drive pulse signal, and apply this circuit and can easily realize many high-power phase-shift type full-bridge power supplys by the mode synchronous working of parallel drive, to facilitate expansion power output.Owing to having adopted this passive drive mode of pulse transformer, in drive circuit, do not need the float power that provides again independent.Some roads drive pulse signal is independently transmitted, can not adopt any auxiliary circuit to produce or reconstruct Dead Time.
(3) can effectively improve the reliability of system, particularly be applied to large power supply occasion, under complicated electromagnetic environment, can effectively suppress electromagnetic interference, circuit form is simple simultaneously, traditional electromagnetic coupled formula drive circuit has obviously been simplified circuit, has been reduced cost relatively at present, and the occasion that is applied in many high-power phase-shift type full-bridge power supply synchronous workings has significant advantage.
Accompanying drawing explanation
Fig. 1 is the circuit structure diagram of electromagnetic coupled formula high-power drive circuit of the present utility model.
Fig. 2 is the circuit structure diagram of signal isolating amplifier circuit in electromagnetic coupled formula high-power drive circuit of the present utility model.
Fig. 3 is the circuit structure diagram of IGBT drive circuit in electromagnetic coupled formula high-power drive circuit of the present utility model.
Embodiment
Below in conjunction with Figure of description, execution mode of the present utility model is described.
As shown in Figure 1, the utility model has designed a kind of electromagnetic coupled formula high-power drive circuit, comprise successively connected phase-shifting full-bridge pulse signal generating circuit, signal isolating amplifier circuit and IGBT drive circuit, wherein phase-shifting full-bridge pulse signal generating circuit is for generation of the pulse signal with certain Dead Time, and signal isolating amplifier circuit is for amplifying this pulse signal isolation; Described signal isolating amplifier circuit is comprised of high speed gate-drive chip, the first pulse transformer, two half-bridge circuits, and the pulse signal that described phase-shifting full-bridge pulse signal generating circuit produces carries out first order amplification by high speed gate-drive chip; Described pulse signal after the first order is amplified is become the two-way drive pulse signal of single spin-echo by the first pulse transformer isolated variable; The two-way drive pulse signal of described single spin-echo amplifies again through two half-bridge circuits respectively; Described drive pulse signal after again amplifying is isolated again by IGBT drive circuit, until isolation exports to drive the IGBT in circuit to be driven to time within the scope of the voltage magnitude at the IGBT place of circuit to be driven.Pulse signal has passed through the isolation of above-mentioned two-stage and has amplified, and can effectively suppress common mode disturbances, significantly improves the isolation voltage tolerance of signal, and this circuit characteristic has determined that the transmission delay of pulse signal is little, reliable operation simultaneously.
The phase-shifting full-bridge pulse signal generating circuit of take below produces pulse signal a, b that 4 tunnels have certain Dead Time, c, d and illustrates as embodiment.
As shown in Figure 1, phase-shifting full-bridge pulse signal produces by the Phase control IC UC3875 of phase-shifting full-bridge pulse signal generating circuit signal pulse a, b, c, the d that 4 tunnels have certain Dead Time, this 4 road signal is mutually isolated on electric, synchronous on the time, is 4 road synchronization pulses.This 4 road pulse signal is transformed into through the signal isolating amplifier circuit shown in Fig. 24 road drive pulse signal A, B, C, the D that amplitude is higher respectively.
Signal isolating amplifier circuit circuit structure as shown in Figure 2, comprise the first resistance R 1, the second resistance R 2, the 3rd resistance R 3, the 4th resistance R 4, the 5th resistance R 5, the 6th resistance R 6, the 7th resistance R 7, the 8th resistance R 8, the first capacitor C 1, the second capacitor C 2, capacitance C3, the 4th capacitor C 4, the 5th capacitor C 5, high speed gate-drive chip N1, the first pulse transformer T1, the first voltage-stabiliser tube V1, the second voltage-stabiliser tube V2, the 3rd voltage-stabiliser tube V3, the 4th voltage-stabiliser tube V4, the first switching tube Q1, second switch pipe Q2, wherein said the first pulse transformer T1 comprises input and the first output, the second output, described input, the first output and the second output include first end and the second end, as shown in Figure 2, one end that can be using 1 pin of the first pulse transformer T1 as input, 2 pins of the first pulse transformer T1 are as the other end of input, 3 pins of the first pulse transformer T1 are as the first end of the first output, 4 pins of the first pulse transformer T1 are as the second end of the first output, 5 pins of the first pulse transformer T1 are as the first end of the second output, and 6 pins of the first pulse transformer T1 are as the second end of the second output, and for high speed gate-drive chip N1, comprise 8 pins, wherein 1 and 8 pins of high speed gate-drive chip N1 are as power end, 4 and 5 pins of high speed gate-drive chip N1 are as earth terminal, 2 and 3 pins of high speed gate-drive chip N1 are as input, and 6 and 7 pins of high speed gate-drive chip N1 are as output.The anode of described pulse signal is connected with 2 pins of high speed gate-drive chip N1 by the first resistance R 1,2, the 3 pin short circuits of high speed gate-drive chip N1; Described the second resistance R 2 and the first capacitor C 1 are connected in parallel between 2 pins and reference ground GND of high speed gate-drive chip N1; The negative terminal of described pulse signal connects with reference to ground GND; 1,8 pins of described high speed gate-drive chip N1 are connected with positive supply+15V, and described positive supply+15V is connected with reference ground GND by the second capacitor C 2; 4,5 pins of described high speed gate-drive chip N1 connect with reference to ground GND; 6, the 7 pin short circuits of described high speed gate-drive chip N1,6 pins of high speed gate-drive chip N1 are connected to 1 pin of the first pulse transformer T1 by capacitance C3; 2 pins of described the first pulse transformer T1 connect with reference to ground GND, 3 pins of the first pulse transformer T1 connect the E utmost point of the first switching tube Q1,4 pins of the first pulse transformer T1 connect the G utmost point of the first switching tube Q1 by the 3rd resistance R 3, described the first voltage-stabiliser tube V1 is in parallel with the 3rd resistance R 3; Described the 3rd voltage-stabiliser tube V3 and the 5th resistance R 5 are connected in parallel on the E utmost point and the G utmost point of the first switching tube Q1; The C utmost point of described the first switching tube Q1 is connected to positive supply; 5 pins of described the first pulse transformer T1 connect the G utmost point of second switch pipe Q2 by the 4th resistance R 4,6 pins of the first pulse transformer T1 connect the E utmost point of second switch pipe Q2, and described the second voltage-stabiliser tube V2 is in parallel with the 4th resistance R 4; Described the 4th voltage-stabiliser tube V4, the 6th resistance R 65 are connected in parallel on the E utmost point and the G utmost point of the second voltage-stabiliser tube V2; The anode of described the 4th capacitor C 4 connects positive supply, and the negative terminal of the 4th capacitor C 4 connects the anode of the 5th capacitor C 5, and described the 7th resistance R 7 is in parallel with the 4th capacitor C 4; The negative terminal of described the 5th capacitor C 5 connects negative supply, and the 8th resistance R 8 is in parallel with the 5th capacitor C 5; And the E utmost point of the first switching tube Q1 is extremely connected with the C of second switch pipe Q2, the anode that the negative terminal of the 4th capacitor C 4 is output pulse signal, the C of second switch pipe Q2 is the negative terminal of output pulse signal very.The pulse signal a that the Phase control IC of take produces is example, by pulse signal a, through R1, delivered to the input of high speed gate-drive chip N1, pulse signal after the amplification of high speed gate-drive chip N1 output arrives the elementary of the first pulse transformer T1 after capacitance C3, in T1 level of the first pulse transformer, produce two groups of opposite polarity pulse signals, this two group pulses signal removes respectively to drive the first switching tube Q1 and two MOSFET of second switch pipe Q2, the first switching tube Q1, second switch pipe Q2, the 4th capacitor C 4, the 5th capacitor C 5 forms half-bridge circuit, by external power supply, pulse signal is strengthened as the drive pulse signal A of amplitude 2HV.
The circuit structure of IGBT drive circuit as shown in Figure 3, comprise current-limiting resistance R9, the tenth resistance R 10, the 11 resistance R 11, the second pulse transformer T2, the 5th voltage-stabiliser tube V5, wherein said the second pulse transformer T2 comprises input and output, input and output include two ends, as shown in the figure, one end using 1 pin of the second pulse transformer T2 as input, 2 pins of the second pulse transformer T2 are as the other end of input, 3 pins of the second pulse transformer T2 are as one end of output, 4 pins of the second pulse transformer T2 are as the other end of output.The anode of the described drive pulse signal through the output of signal isolating amplifier circuit connects 1 pin of the second pulse transformer T2 by current-limiting resistance R9, the negative terminal of drive pulse signal connects 2 pins of the second pulse transformer T2,3 pins of the second pulse transformer T2 connect the G utmost point of IGBT pipe V6 to be driven by the tenth resistance R 10,4 pins of the second pulse transformer T2 connect the E utmost point of IGBT pipe V6 to be driven; Described the 5th voltage-stabiliser tube V5 and the 11 resistance R 11 are connected in parallel on the G utmost point and the E utmost point of the V6 of IGBT in circuit to be driven; The stronger drive pulse signal A amplifying through front stage circuits delivers to the elementary of the second pulse transformer T2 through current-limiting resistance R9, and by the second pulse transformer T2 step-down rear drive, an IGBT manages.Generating 4 tunnels independently during synchronization pulse, drive pulse signal A, the B after amplification, C, D can drive respectively 4 IGBT pipes of full-bridge circuit through IGBT drive circuit.When needs carry out power expansion, the parallel way of IGBT drive circuit as shown in Figure 1, the drive pulse signal A of signal isolating amplifier circuit output can be used as in parallel use of input signal A of a plurality of IGBT drive circuits, the drive pulse signal B of signal isolating amplifier circuit output can be used as in parallel use of input signal B of a plurality of IGBT drive circuits, the drive pulse signal C of signal isolating amplifier circuit output can be used as in parallel use of input signal C of a plurality of IGBT drive circuits, the drive pulse signal D of signal isolating amplifier circuit output can be used as in parallel use of input signal D of a plurality of IGBT drive circuits.The 4 separate transmission of road phase-shift pulse signal process secondary isolation and amplification, can be according to application demand, and this electromagnetic coupled formula high-power drive circuit can be organized full-bridge circuit IGBT pipe by parallel drive more, to reach the object of expansion power output.Further, at the elementary current-limiting resistance R9 that connected of the second pulse transformer T2, to prevent that the G utmost point short circuit of a certain road IGBT from causing the impact of primary overcurrent on other driving loop of parallel connection.And the G utmost point of IGBT to be driven and E extremely in parallel forward and reverse voltage-stabiliser tube, drive pulse signal amplitude limit, in zone of reasonableness, is guaranteed to switching tube safety.
The operation principle of the present embodiment is as follows, and (for example a), by high speed gate-drive chip, N1 carries out first order amplification to pulse signal to each the road pulse signal being produced by Phase control IC UC3875.Each road pulse signal after the first order is amplified is become the two-way low-power drive pulse signal of single spin-echo by the first pulse transformer T1 isolated variable, the two-way drive pulse signal of this single spin-echo drives respectively two low power switch pipes of half-bridge circuit.Half-bridge circuit is enlarged into the pulsed power signal that amplitude is higher (drive pulse signal A) again by pulse signal.Selecting suitable driving resistance, designing suitable pulse transformer parameter is the key that maintains impulse waveform and Dead Time.Like this, the 4 road pulse signals that Phase control IC UC3875 produces all pass through signal isolating amplifier circuit, form the drive pulse signal of A, B, C, D 4 tunnels amplifications, do not need extra auxiliary circuit can guarantee edge, pulse front and back and Dead Time.Signal pulse has passed through the isolation of above-mentioned two-stage and has amplified, and can effectively suppress common mode disturbances, significantly improves the isolation voltage tolerance of signal, and this circuit characteristic has determined that the transmission delay of pulse signal is little, reliable operation simultaneously.
Drive pulse signal A after amplification isolates suitable voltage magnitude in order to drive high-power IGBT through the second pulse transformer T2.The elementary current-limiting resistance R9 that connected of the second pulse transformer T2, to prevent that a certain road IGBT gate short from causing the impact of the elementary overcurrent of the second pulse transformer T2 on other driving loop of parallel connection.The second pulse transformer T2 grid parallel connection forward and reverse voltage-stabiliser tube, drive pulse signal amplitude limit, in ± 15V, is guaranteed to switching tube safety.
As shown in Figure 1,4 tunnels that produced by Phase control IC UC3875 have pulse signal a, b, c, the d of certain Dead Time, after signal isolating amplifier circuit, zoom into respectively one group of amplitude for the ± hard pulse signal A of HV, B, C, D, this hard pulse signal can provide drive pulse signal for the IGBT drive circuit of a plurality of parallel connections, and each the group driving pulse after the conversion of IGBT drive circuit can drive one group of corresponding 4 IGBT of full-bridge circuit.Like this, many high-power inverters can be under identical driving pulse synchronous working, according to power demand, can select the number of units of the inverter of synchronous working, phase-shift pulse is controlled in phase-shifting full-bridge pulse signal generating circuit segment set and completes, and the inverter that increases or reduce synchronous working only need to be connected to drive pulse signal A, B, C, the D of the output of signal isolating amplifier circuit the IGBT drive circuit of certain inverter or disconnect from IGBT drive circuit.
In the utility model practical circuit, the 4 separate transmission of road phase-shift pulse signal process multi-stage isolation and amplification, device is selected and has all been considered switching rate, signal delay and antijamming capability, and in circuit, anti-interference process is taked in many places, global design is simple and practical, reliable and stable.
The utility model is applied to high-power drive circuit by pulse transformer, innovation ground application electromagnetic coupled mode is independently transmitted 4 road drive pulse signals and has been realized highly-reliable transmission and the isolation of high voltage tolerance that drives signal, and apply this circuit and can easily realize many high-power phase-shift type full-bridge power supplys by the mode synchronous working of parallel drive, to facilitate expansion power output.Owing to having adopted this passive drive mode of pulse transformer, in drive circuit, do not need the float power that provides again independent.4 road drive pulse signals are independently transmitted, can not adopt any auxiliary circuit to produce or reconstruct Dead Time.In system, the phase shifting control of all synchronous working power supplys has been concentrated at phase-shifting full-bridge pulse signal generating circuit, pulse signal amplifies through twice isolation, realized the electrical isolation of control circuit and power circuit high voltage magnitude, the high speed of signal, effectively transmission have been realized again, transmission delay is little, inhibition ability to common-mode signal is strong, can realize higher switching frequency (tens kHz).
Thus, this circuit can effectively improve the reliability of system, particularly be applied to large power supply occasion, under complicated electromagnetic environment, can effectively suppress electromagnetic interference, circuit form is simple simultaneously, traditional electromagnetic coupled formula drive circuit has obviously been simplified circuit, has been reduced cost relatively at present, and the occasion that is applied in many high-power phase-shift type full-bridge power supply synchronous workings has significant advantage.
By reference to the accompanying drawings execution mode of the present utility model is explained in detail above, but the utility model is not limited to above-mentioned execution mode, in the ken possessing those of ordinary skills, can also under the prerequisite that does not depart from the utility model aim, make a variety of changes.
Claims (7)
1. an electromagnetic coupled formula high-power drive circuit, it is characterized in that: comprise generation phase-shifting full-bridge pulse signal generating circuit for pulse signal, for pulse signal isolate amplifying signal isolating amplifier circuit, for again isolating and the IGBT drive circuit that drives signal being provided, wherein said signal isolating amplifier circuit is comprised of high speed gate-drive chip, the first pulse transformer, two half-bridge circuits, and described phase-shifting full-bridge pulse signal generating circuit is connected with high speed gate-drive chip; Described high speed gate-drive chip is connected with the first pulse transformer; Described the first pulse transformer is connected with two half-bridge circuits respectively; Described two half-bridge circuits are connected with IGBT drive circuit respectively; Described IGBT drive circuit is connected with the IGBT in circuit to be driven.
2. electromagnetic coupled formula high-power drive circuit according to claim 1, it is characterized in that: described signal isolating amplifier circuit comprises the first resistance (R1), the second resistance (R2), the 3rd resistance (R3), the 4th resistance (R4), the 5th resistance (R5), the 6th resistance (R6), the 7th resistance (R7), the 8th resistance (R8), the first electric capacity (C1), the second electric capacity (C2), capacitance (C3), the 4th electric capacity (C4), the 5th electric capacity (C5), high speed gate-drive chip (N1), the first pulse transformer (T1), the first voltage-stabiliser tube (V1), the second voltage-stabiliser tube (V2), the 3rd voltage-stabiliser tube (V3), the 4th voltage-stabiliser tube (V4), the first switching tube (Q1), second switch pipe (Q2), wherein said the first pulse transformer (T1) comprises input and the first output, the second output, described input, the first output and the second output include first end and the second end, the anode of described pulse signal is connected with the input of high speed gate-drive chip (N1) by the first resistance (R1), the negativing ending grounding of described pulse signal, the parallel circuits that is connected the second resistance (R2) and the first electric capacity (C1) between the input of described high speed gate-drive chip (N1) and ground, between the power end of described high speed gate-drive chip (N1) and ground, be connected the second electric capacity (C2), the output of described high speed gate-drive chip (N1) is connected with the first end of the input of the first pulse transformer (T1) by capacitance (C3), the second end ground connection of the input of described the first pulse transformer (T1), the first end of the first output of described the first pulse transformer (T1) connects the E utmost point of the first switching tube (Q1), and the second end of the first pulse transformer (T1) the first output connects the G utmost point of the first switching tube (Q1) by the 3rd resistance (R3), described the first voltage-stabiliser tube (V1) is in parallel with the 3rd resistance (R3), and the negative electrode of the first voltage-stabiliser tube (V1) is connected with the second end of the first pulse transformer (T1) the first output, described the 3rd voltage-stabiliser tube (V3) and the 5th resistance (R5) are connected in parallel on the E utmost point and the G utmost point of the first switching tube (Q1), the C utmost point of described the first switching tube (Q1) is connected to positive supply, the first end of described the first pulse transformer (T1) the second output connects the G utmost point of second switch pipe (Q2) by the 4th resistance (R4), the second end of the first pulse transformer (T1) the second output connects the E utmost point of second switch pipe (Q2), described the second voltage-stabiliser tube (V2) is in parallel with the 4th resistance (R4), and the negative electrode of described the second voltage-stabiliser tube (V2) is connected with the first end of the first pulse transformer (T1) the second output, described the 4th voltage-stabiliser tube (V4), the 6th resistance (R6) are connected in parallel on the E utmost point and the G utmost point of the second voltage-stabiliser tube (V2), the anode of described the 4th electric capacity (C4) connects positive supply, and the negative terminal of the 4th electric capacity (C4) connects the anode of the 5th electric capacity (C5), and described the 7th resistance (R7) is in parallel with the 4th electric capacity (C4), the negative terminal of described the 5th electric capacity (C5) connects negative supply, and the 8th resistance (R8) is in parallel with the 5th electric capacity (C5), and the E utmost point of the first switching tube (Q1) is extremely connected with the C of second switch pipe (Q2), the anode that the negative terminal of the 4th electric capacity (C4) is output pulse signal, the C of second switch pipe (Q2) is the negative terminal of output pulse signal very.
3. according to electromagnetic coupled formula high-power drive circuit described in claim 1 or 2, it is characterized in that: described IGBT drive circuit comprises the second pulse transformer (T2), the tenth resistance (R10), the 11 resistance (R11), the anode of wherein said signal isolating amplifier circuit output pulse signal is connected with one end of the second pulse transformer (T2) input, and the negative terminal of described signal isolating amplifier circuit output pulse signal is connected with the other end of the second pulse transformer (T2) input; One end of described the second pulse transformer (T2) output connects the G utmost point of IGBT pipe to be driven by the tenth resistance (R10), the other end of the second pulse transformer (T2) output connects the E utmost point of IGBT pipe to be driven; Described the 11 resistance (R11) is connected in parallel between the G utmost point and the E utmost point of IGBT in circuit to be driven.
4. electromagnetic coupled formula high-power drive circuit according to claim 3, it is characterized in that: described IGBT drive circuit also comprises current-limiting resistance (R9), the anode of described signal isolating amplifier circuit output pulse signal is connected with one end of the second pulse transformer (T2) input by current-limiting resistance (R9).
5. electromagnetic coupled formula high-power drive circuit according to claim 4, it is characterized in that: described IGBT drive circuit also comprises that described the 5th voltage-stabiliser tube (V5) is connected in parallel between the G utmost point and the E utmost point of IGBT in circuit to be driven for limiting the 5th voltage-stabiliser tube (V5) of the drive pulse signal amplitude of output.
6. electromagnetic coupled formula high-power drive circuit according to claim 5, is characterized in that: described IGBT drive circuit is comprised of the IGBT drive circuit of some groups of parallel connections.
7. electromagnetic coupled formula high-power drive circuit according to claim 6, is characterized in that: the output of described phase-shifting full-bridge pulse signal generating circuit comprises the synchronization pulse of four groups of electrical isolation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420348305.7U CN203933600U (en) | 2014-06-26 | 2014-06-26 | A kind of electromagnetic coupled formula high-power drive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420348305.7U CN203933600U (en) | 2014-06-26 | 2014-06-26 | A kind of electromagnetic coupled formula high-power drive circuit |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107027205A (en) * | 2016-02-02 | 2017-08-08 | 佛山市顺德区美的电热电器制造有限公司 | The drive circuit of power switch pipe in electromagnetic heater and electromagnetic heater |
| CN108306627A (en) * | 2018-02-02 | 2018-07-20 | 上海理工大学 | The amplification method of unipolarity square-wave signal |
| CN110620573A (en) * | 2018-06-19 | 2019-12-27 | 台达电子工业股份有限公司 | Drive circuit for power semiconductor switch |
| CN113315355A (en) * | 2021-07-02 | 2021-08-27 | 上海空间电源研究所 | High-reliability delay isolation driving circuit for spacecraft |
-
2014
- 2014-06-26 CN CN201420348305.7U patent/CN203933600U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107027205A (en) * | 2016-02-02 | 2017-08-08 | 佛山市顺德区美的电热电器制造有限公司 | The drive circuit of power switch pipe in electromagnetic heater and electromagnetic heater |
| CN107027205B (en) * | 2016-02-02 | 2022-12-06 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic heating device and driving circuit of power switch tube in electromagnetic heating device |
| CN108306627A (en) * | 2018-02-02 | 2018-07-20 | 上海理工大学 | The amplification method of unipolarity square-wave signal |
| CN110620573A (en) * | 2018-06-19 | 2019-12-27 | 台达电子工业股份有限公司 | Drive circuit for power semiconductor switch |
| CN110620573B (en) * | 2018-06-19 | 2022-10-14 | 台达电子工业股份有限公司 | Drive circuit for power semiconductor switch |
| CN113315355A (en) * | 2021-07-02 | 2021-08-27 | 上海空间电源研究所 | High-reliability delay isolation driving circuit for spacecraft |
| CN113315355B (en) * | 2021-07-02 | 2022-12-13 | 上海空间电源研究所 | High-reliability delay isolation driving circuit for spacecraft |
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