CN203788205U - Drive circuit without added driving power supplies - Google Patents

Drive circuit without added driving power supplies Download PDF

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Publication number
CN203788205U
CN203788205U CN201420077320.2U CN201420077320U CN203788205U CN 203788205 U CN203788205 U CN 203788205U CN 201420077320 U CN201420077320 U CN 201420077320U CN 203788205 U CN203788205 U CN 203788205U
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drive circuit
resistance
voltage
brachium pontis
driven type
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陈通朴
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陈通朴
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Abstract

The utility model relates to a drive circuit without added driving power supplies. An upper bridge leg drive circuit charges a capacitor E1 or a capacitor E2 with electricity through a working power supply, then the capacitor E1 or the capacitor E2 discharges through a voltage division circuit, and a driving voltage for conducting a first or second voltage driving device is generated. A lower bridge leg drive circuit generates a driving voltage for conducting a third or fourth voltage driving device through a loop formed by the working power supply and the voltage division circuit. By adjusting the magnitude of a voltage division resistor in the voltage division circuit, driving voltages for conducting corresponding voltage driving devices can be generated regardless of the magnitude of the output voltage of the working power supply. Accordingly, when an H bridge drive circuit works under a high voltage condition, low voltage power supplies or voltage reduction units do not need to be additionally installed, and therefore the drive circuit without added driving power supplies is low in cost and can be used in high-low voltage states.

Description

Without the drive circuit of additional driving power
Technical field
The utility model relates to H bridge drive circuit technology, specifically a kind of drive circuit without additional driving power.
Background technology
Shown in Fig. 1, be the H bridge drive circuit that tradition adopts, in figure, Q1, Q2, Q3, Q4 are four igbts (IGBT), and 15V1,15V2,15V3 represent three additional driving powers.In the time of drives controlled mechanism separating brake, 15V1,15V3 are used for opening Q1, Q3 as the driving power of Q1, Q3 respectively, and working power and controlled mechanism form loop by Q1, Q3 like this.In like manner, in the time that drives controlled mechanism closes a floodgate, 15V2,15V3 are used for opening Q2, Q4 as the driving power of Q2, Q4 respectively, and working power and controlled mechanism form loop by Q2, Q4 like this.Conventionally the H bridge drive circuit adopting, need to add 15V1,15V2, tri-additional driving powers of 15V3, and this has not only added extra cost, and in the time that the output voltage of additional driving power is unstable, the damage of IGBT very easily occurs.
Chinese patent literature CN102522933A discloses a kind of direct current motor drive circuit, this application comprises: H bridge drive circuit, voltage stabilizing circuit, PWM drive circuit, wherein voltage stabilizing circuit produces the required driving voltage of conducting metal-oxide-semiconductor, described voltage stabilizing circuit comprises negative pressure voltage stabilizing circuit and malleation voltage stabilizing circuit, described negative pressure voltage stabilizing circuit, for generation of the required driving voltage of upper brachium pontis metal-oxide-semiconductor conducting, generally adopts LM79XX series linear voltage stabilization chip; Described malleation voltage stabilizing circuit, for generation of the required driving voltage of lower brachium pontis metal-oxide-semiconductor conducting, generally adopts LM7815 (A6).Described in the disclosed a kind of direct current motor drive circuit of above-mentioned patent documentation, H bridge drive circuit works is in low pressure (28V) situation, the input of LM79XX series linear voltage stabilization chip and LM7815 (A6) is connected with H bridge drive circuit low-voltage supply, and the output of LM79XX series linear voltage stabilization chip and LM7815 (A6) produces the required stable driving voltage of conducting metal-oxide-semiconductor.Realize without additional driving power and kept driving voltage stable.
Because the input voltage of LM79XX family chip and LM7815 (A6) chip can not be too high, so in the disclosed a kind of direct current motor drive circuit of above-mentioned patent documentation, produce the required driving voltage of conducting metal-oxide-semiconductor by voltage stabilizing circuit and be only only applicable to be operated in the H bridge drive circuit under low pressure (28V) situation, when under the situation of H bridge drive circuit works at high pressure, the input of LM79XX series linear voltage stabilization chip and LM7815 (A6) will be inputted by special low-tension supply or by pressure unit after the working power step-down of described H bridge drive circuit, while making the disclosed H bridge of above-mentioned patent documentation drive circuit works under high pressure conditions, must add and set up low-tension supply or pressure unit, directly cause the disclosed technical scheme use cost of above-mentioned patent high, versatility is poor.
Utility model content
For this reason, technical problem to be solved in the utility model is that above-mentioned patent documentation is by producing the required driving voltage of conducting metal-oxide-semiconductor with voltage stabilizing circuit, while making above-mentioned H bridge drive circuit works under high pressure conditions, must set up low-tension supply or pressure unit, directly cause the disclosed technical scheme use cost height of above-mentioned patent documentation and versatility poor, thereby propose a kind of drive circuit without additional driving power that use cost is low and high-low pressure is all suitable for.
For solving the problems of the technologies described above, the technical solution of the utility model is as follows:
Without a drive circuit for additional driving power, comprising:
Working power, comprises positive pole and negative pole;
H bridge drive circuit, comprise the first voltage driven type device, the driving device of second voltage, the driving device of tertiary voltage, the 4th voltage driven type device and controlled mechanism, wherein, the first voltage driven type device composition H bridge drive circuit first on brachium pontis, the driving device of second voltage composition H bridge drive circuit second on brachium pontis, first time brachium pontis of the driving device composition of tertiary voltage H bridge drive circuit, second time brachium pontis of the 4th voltage driven type device composition H bridge drive circuit, described controlled mechanism is positioned on the cross-bridges of H bridge; The electric current inflow end of the electric current inflow end of described the first voltage driven type device and the driving device of described second voltage is connected and their tie point is connected with the positive pole of working power; The outflow of bus current end of the driving device of described tertiary voltage is connected with the outflow of bus current end of described the 4th voltage driven type device and their tie point is connected with the negative pole of working power; The outflow of bus current end of described the first voltage driven type device is connected with the electric current inflow end of the driving device of described tertiary voltage and their tie point is connected with one end of described controlled mechanism; The outflow of bus current end of the driving device of described second voltage is connected with the electric current inflow end of described the 4th voltage driven type device and their tie point is connected with the other end of described controlled mechanism;
Brachium pontis drive circuit on brachium pontis drive circuit and second on first, each described upper brachium pontis drive circuit includes an input, an output and a control end; The input of each described upper brachium pontis drive circuit is all connected with the positive pole of described working power; The control end of each described upper brachium pontis drive circuit is all connected with control circuit; On first, the output of brachium pontis drive circuit is connected with the control end of described the first voltage driven type device, and the output of brachium pontis drive circuit is connected with the control end of the driving device of described second voltage on second;
First time brachium pontis drive circuit and second time brachium pontis drive circuit, each described lower brachium pontis drive circuit includes an input, an output and a control end; The input of each described lower brachium pontis drive circuit is all connected with the positive pole of described working power; The control end of each described lower brachium pontis drive circuit is all connected with control circuit; The output of first time brachium pontis drive circuit is connected with the control end of the driving device of described tertiary voltage, and the output of second time brachium pontis drive circuit is connected with the control end of described the 4th voltage driven type device;
On described first, brachium pontis drive circuit comprises: diode D1, electric capacity E1, resistance R 7, resistance R 1, resistance R 5 and the first controlled switch, and the anode of described diode D1 is as the input of brachium pontis drive circuit on described first; The negative electrode of described diode D1 is connected with one end of described electric capacity E1, and the other end of described electric capacity E1 is connected with one end of described resistance R 7, and the other end of described resistance R 7 is connected with the negative pole of described working power; The tie point that the negative electrode of described diode D1 is connected with one end of described electric capacity E1 is connected with one end of described resistance R 1, the other end of described resistance R 1 is connected with one end of described the first controlled switch, the other end of described the first controlled switch be connected with one end of described resistance R 5 and their tie point as the output of brachium pontis drive circuit on described first, the other end of described resistance R 5 is connected with the outflow of bus current end of described the first voltage driven type device; The control end of described the first controlled switch is as the control end of brachium pontis drive circuit on described first;
On described second, brachium pontis drive circuit comprises: diode D2, electric capacity E2, resistance R 8, resistance R 2, resistance R 6 and the second controlled switch, and the anode of described diode D2 is as the input of brachium pontis drive circuit on described second; The negative electrode of described diode D2 is connected with one end of described electric capacity E2, and the other end of described electric capacity E2 is connected with one end of described resistance R 8, and the other end of described resistance R 8 is connected with the negative pole of described working power; The tie point that the negative electrode of described diode D2 is connected with one end of described electric capacity E2 is connected with one end of described resistance R 2, the other end of described resistance R 2 is connected with one end of described the second controlled switch, the other end of described the second controlled switch be connected with one end of described resistance R 6 and their tie point as the output of brachium pontis drive circuit on described second, the other end of described resistance R 6 is connected with the outflow of bus current end of the driving device of described second voltage; The control end of described the second controlled switch is as the control end of brachium pontis drive circuit on described second;
Described first time brachium pontis drive circuit comprises: diode D3, resistance R 9, resistance R 11 and the 3rd controlled switch, and the anode of described diode D3 is as the input of described first time brachium pontis drive circuit; The negative electrode of described diode D3 is connected with one end of described resistance R 9, the other end of described resistance R 9 is connected with one end of described the 3rd controlled switch, the other end of described the 3rd controlled switch be connected with one end of described resistance R 11 and their tie point as the output of described first time brachium pontis drive circuit, the other end of described resistance R 11 is connected with the outflow of bus current end of the driving device of described tertiary voltage; The control end of described the 3rd controlled switch is as the control end of described first time brachium pontis drive circuit;
Described second time brachium pontis drive circuit comprises: diode D4, resistance R 10, resistance R 12 and the 4th controlled switch, and the anode of described diode D4 is as the input of described second time brachium pontis drive circuit; The negative electrode of described diode D4 is connected with one end of described resistance R 10, the other end of described resistance R 10 is connected with one end of described the 4th controlled switch, the other end of described the 4th controlled switch be connected with one end of described resistance R 12 and their tie point as the output of described second time brachium pontis drive circuit, the other end of described resistance R 12 is connected with the outflow of bus current end of described the 4th voltage driven type device; The control end of described the 4th controlled switch is as the control end of described second time brachium pontis drive circuit.
Described a kind of drive circuit without additional driving power, described working power comprises: polar capacitor C and charge power supply, the positive pole of described charge power supply is connected with the positive pole of described polar capacitor C, and the negative pole of described charge power supply is connected with the negative pole of described polar capacitor C; The positive pole of described polar capacitor C is as the positive pole of described working power; The negative pole of described polar capacitor C is as the negative pole of described working power.
Described a kind of drive circuit without additional driving power, described voltage driven type device is N-type IGBT, described in each, the collector electrode of IGBT forms the electric current inflow end of corresponding voltage driven type device, described in each, the emitter of IGBT forms the outflow of bus current end of corresponding voltage driven type device, and described in each, the grid of IGBT forms the control end of corresponding voltage driven type device.
Described a kind of drive circuit without additional driving power, described controlled switch is photoelectrical coupler, described in each, in photoelectrical coupler, the collector electrode of photistor forms one end of corresponding controlled switch, described in each, in photoelectrical coupler, the emitter of photistor forms the other end of corresponding controlled switch, and described in each, in photoelectrical coupler, light-emitting diode forms the control end of corresponding controlled switch.
Described a kind of drive circuit without additional driving power, also comprises over-current detection circuit, and described over-current detection circuit comprises an input and an output; The input of described over-current detection circuit is connected with the outflow of bus current end of described the 4th voltage driven type device with the driving device of described tertiary voltage, for gathering by the electric current of the driving device of described tertiary voltage and described the 4th voltage driven type device; The output of described over-current detection circuit is connected with control circuit, for the electric current collecting is exported to control circuit; Described control circuit receives described electric current and in the time that described electric current exceedes predetermined value, stops output drive signal.
Described a kind of drive circuit without additional driving power, described over-current detection circuit comprises sampling resistor R13, chip ACPL-C790, resistance R 14, resistance R 16, voltage stabilizing didoe D5, direct current 3.3V power supply, one end of described sampling resistor R13 be connected with one end of described resistance R 16 and their tie point as the input of described over-current detection circuit; The other end of described resistance R 16 is connected with the pin 2 of described chip ACPL-C790; The other end of described sampling resistor R13 is connected with the negative pole of described polar capacitor C; One end of described resistance R 14 is connected with the positive pole of described polar capacitor C, the other end of described resistance R 14 is connected with the pin 1 of described chip ACPL-C790 and is connected with the negative electrode of described voltage stabilizing didoe D5, and the anode of described voltage stabilizing didoe D5 is connected with the negative pole of described polar capacitor C; The pin 3 of described chip ACPL-C790 is connected with the negative pole of described polar capacitor C with pin 4, the pin 8 of described chip ACPL-C790 is connected with the positive pole of described direct current 3.3V power supply, the pin 5 of described chip ACPL-C790 is connected with the negative pole of described direct current 3.3V power supply with pin 6, and the pin 7 of described chip ACPL-C790 is as the output of described over-current detection circuit.
Described a kind of drive circuit without additional driving power, also comprise four Transient Suppression Diodes, one end of each described Transient Suppression Diode is connected with the control end of a described voltage driven type device, and the other end of each described Transient Suppression Diode is connected with the outflow of bus current end of corresponding voltage driven type device.
Described a kind of drive circuit without additional driving power, also comprises two electric capacity that are connected in parallel on described controlled mechanism two ends after series connection.
Technique scheme of the present utility model has the following advantages compared to existing technology:
1. a kind of drive circuit without additional driving power that the utility model provides, on described first, brachium pontis drive circuit forms the charge circuit of electric capacity E1 by working power, diode D1, electric capacity E1 and resistance R 7, in the time that the first controlled switch is closed, the discharge loop that described electric capacity E1, resistance R 1, the first controlled switch and resistance R 5 form electric capacity E1 produces the required driving voltage of conducting the first voltage driven type device; In like manner, on described second, brachium pontis drive circuit forms the charge circuit of electric capacity E2 by working power, diode D2, electric capacity E2 and resistance R 8, in the time that the second controlled switch is closed, the discharge loop that described electric capacity E2, resistance R 2, the second controlled switch and resistance R 6 form electric capacity E2 produces the required driving voltage of the driving device of conducting second voltage.In described first time brachium pontis drive circuit, in the time that the 3rd controlled switch is closed, the loop that described working power and diode D3, resistance R 9, the 3rd controlled switch and resistance R 11 form produces the required driving voltage of the driving device of conducting tertiary voltage; In like manner, in described second time brachium pontis drive circuit, in the time that the 4th controlled switch is closed, the loop that described working power and diode D4, resistance R 10, the 4th controlled switch and resistance R 12 form produces the required driving voltage of conducting the 4th voltage driven type device.The no matter height of the output voltage of described working power, by the size of regulating resistance R1, resistance R 2, resistance R 9 and resistance R 10, all can produce the required driving voltage of voltage driven type device corresponding to conducting, therefore in the time that H bridge drive circuit works is under high-pressure situations, without setting up low-tension supply or pressure unit, the low and high-low pressure of the cost of described a kind of drive circuit without additional driving power is all suitable for.
2. a kind of drive circuit without additional driving power that the utility model provides, working power comprises: polar capacitor C and charge power supply.Select polar capacitor C can ensure the output voltage stabilization of working power, and polar capacitor energy storage is large, is specially adapted to the situation of H bridge drive circuit works at high pressure.
3. a kind of drive circuit without additional driving power that the utility model provides, described voltage driven type device is N-type IGBT, in voltage driven type device, the through-current capability of IGBT is stronger, simultaneously, the low price of the cost ratio P type IGBT of N-type IGBT, and the control of the control ratio P type IGBT of N-type IGBT is convenient, so described voltage driven type device is all selected N-type IGBT.
4. a kind of drive circuit without additional driving power that the utility model provides, described controlled switch is photoelectrical coupler, components and parts in control circuit can only bear less voltage and electric current under normal circumstances, and voltage and electric current in H bridge drive circuit is larger, not only can accept the control signal of control circuit by selecting photoelectrical coupler, and control circuit and H bridge drive circuit are carried out to electrical isolation, ensured the safety of components and parts in control circuit.
5. a kind of drive circuit without additional driving power that the utility model provides, also comprise over-current detection circuit, described over-current detection circuit is used for gathering by the electric current of the driving device of described tertiary voltage and described the 4th voltage driven type device, and the electric current collecting is exported to control circuit; Described control circuit receives described electric current and in the time that described electric current exceedes predetermined value, stops output drive signal.Can turn-off in time described voltage driven type device, avoid the damage of described voltage driven type device.
6. a kind of drive circuit without additional driving power that the utility model provides, described over-current detection circuit comprises sampling resistor R13, chip ACPL-C790, resistance R 14, resistance R 16, voltage stabilizing didoe D5, direct current 3.3V power supply.Be voltage by sampling resistor R13 is set by the current transitions of the input of described over-current detection circuit, more convenient detection; Use chip ACPL-C790 not only can transmit described voltage to described control circuit, H bridge drive circuit and control circuit are carried out to electrical isolation simultaneously, effectively protect the components and parts in control circuit.
7. a kind of drive circuit without additional driving power that the utility model provides, also comprise four Transient Suppression Diodes, one end of each described Transient Suppression Diode is connected with the control end of a described voltage driven type device, and the other end of each described Transient Suppression Diode is connected with the outflow of bus current end of corresponding voltage driven type device.When the moment that control circuit sends Continuity signal, may produce high impulse, voltage driven type device is easily punctured by high impulse, described Transient Suppression Diode is set, in the situation that there is high impulse, the control utmost point of short circuit voltage driven type device and outflow of bus current end, turn-off described voltage driven type device, avoids described voltage driven type device failure.
8. a kind of drive circuit without additional driving power that the utility model provides, also comprises two electric capacity that are connected in parallel on described controlled mechanism two ends after series connection.Cause in superpotential situation protection personal safety in thunderbolt.
Brief description of the drawings
For content of the present utility model is more likely to be clearly understood, according to specific embodiment of the utility model also by reference to the accompanying drawings, the utility model is described in further detail, wherein below
Fig. 1 is the circuit structure diagram of traditional H bridge drive circuit;
Fig. 2 is the circuit structure diagram of a kind of drive circuit without additional driving power of an embodiment of the utility model;
Fig. 3 is the circuit structure diagram of a kind of drive circuit without additional driving power that comprises over-current detection circuit of an embodiment of the utility model;
Fig. 4 is the circuit structure diagram of a kind of drive circuit without additional driving power that comprises Transient Suppression Diode of an embodiment of the utility model;
Fig. 5 is the circuit structure diagram of a kind of drive circuit without additional driving power that comprises lightning protection circuit of an embodiment of the utility model.
Embodiment
Embodiment 1
As a kind of drive circuit without additional driving power of an embodiment of the utility model, comprising:
Working power, comprises positive pole and negative pole.
H bridge drive circuit, comprise the first voltage driven type device, the driving device of second voltage, the driving device of tertiary voltage, the 4th voltage driven type device and controlled mechanism, wherein, the first voltage driven type device composition H bridge drive circuit first on brachium pontis, the driving device of second voltage composition H bridge drive circuit second on brachium pontis, first time brachium pontis of the driving device composition of tertiary voltage H bridge drive circuit, second time brachium pontis of the 4th voltage driven type device composition H bridge drive circuit, described controlled mechanism is positioned on the cross-bridges of H bridge; The electric current inflow end of the electric current inflow end of described the first voltage driven type device and the driving device of described second voltage is connected and their tie point is connected with the positive pole of working power; The outflow of bus current end of the driving device of described tertiary voltage is connected with the outflow of bus current end of described the 4th voltage driven type device and their tie point is connected with the negative pole of working power; The outflow of bus current end of described the first voltage driven type device is connected with the electric current inflow end of the driving device of described tertiary voltage and their tie point is connected with one end of described controlled mechanism; The outflow of bus current end of the driving device of described second voltage is connected with the electric current inflow end of described the 4th voltage driven type device and their tie point is connected with the other end of described controlled mechanism.
Brachium pontis drive circuit on brachium pontis drive circuit and second on first, each described upper brachium pontis drive circuit includes an input, an output and a control end; The input of each described upper brachium pontis drive circuit is all connected with the positive pole of described working power; The control end of each described upper brachium pontis drive circuit is all connected with control circuit; On first, the output of brachium pontis drive circuit is connected with the control end of described the first voltage driven type device, and the output of brachium pontis drive circuit is connected with the control end of the driving device of described second voltage on second.
First time brachium pontis drive circuit and second time brachium pontis drive circuit, each described lower brachium pontis drive circuit includes an input, an output and a control end; The input of each described lower brachium pontis drive circuit is all connected with the positive pole of described working power; The control end of each described lower brachium pontis drive circuit is all connected with control circuit; The output of first time brachium pontis drive circuit is connected with the control end of the driving device of described tertiary voltage, and the output of second time brachium pontis drive circuit is connected with the control end of described the 4th voltage driven type device.
On described first, brachium pontis drive circuit comprises: diode D1, electric capacity E1, resistance R 7, resistance R 1, resistance R 5 and the first controlled switch, and the anode of described diode D1 is as the input of brachium pontis drive circuit on described first; The negative electrode of described diode D1 is connected with one end of described electric capacity E1, and the other end of described electric capacity E1 is connected with one end of described resistance R 7, and the other end of described resistance R 7 is connected with the negative pole of described working power; The tie point that the negative electrode of described diode D1 is connected with one end of described electric capacity E1 is connected with one end of described resistance R 1, the other end of described resistance R 1 is connected with one end of described the first controlled switch, the other end of described the first controlled switch be connected with one end of described resistance R 5 and their tie point as the output of brachium pontis drive circuit on described first, the other end of described resistance R 5 is connected with the outflow of bus current end of described the first voltage driven type device; The control end of described the first controlled switch is as the control end of brachium pontis drive circuit on described first.
On described second, brachium pontis drive circuit comprises: diode D2, electric capacity E2, resistance R 8, resistance R 2, resistance R 6 and the second controlled switch, and the anode of described diode D2 is as the input of brachium pontis drive circuit on described second; The negative electrode of described diode D2 is connected with one end of described electric capacity E2, and the other end of described electric capacity E2 is connected with one end of described resistance R 8, and the other end of described resistance R 8 is connected with the negative pole of described working power; The tie point that the negative electrode of described diode D2 is connected with one end of described electric capacity E2 is connected with one end of described resistance R 2, the other end of described resistance R 2 is connected with one end of described the second controlled switch, the other end of described the second controlled switch be connected with one end of described resistance R 6 and their tie point as the output of brachium pontis drive circuit on described second, the other end of described resistance R 6 is connected with the outflow of bus current end of the driving device of described second voltage; The control end of described the second controlled switch is as the control end of brachium pontis drive circuit on described second.
Described first time brachium pontis drive circuit comprises: diode D3, resistance R 9, resistance R 11 and the 3rd controlled switch, and the anode of described diode D3 is as the input of described first time brachium pontis drive circuit; The negative electrode of described diode D3 is connected with one end of described resistance R 9, the other end of described resistance R 9 is connected with one end of described the 3rd controlled switch, the other end of described the 3rd controlled switch be connected with one end of described resistance R 11 and their tie point as the output of described first time brachium pontis drive circuit, the other end of described resistance R 11 is connected with the outflow of bus current end of the driving device of described tertiary voltage; The control end of described the 3rd controlled switch is as the control end of described first time brachium pontis drive circuit.
Described second time brachium pontis drive circuit comprises: diode D4, resistance R 10, resistance R 12 and the 4th controlled switch, and the anode of described diode D4 is as the input of described second time brachium pontis drive circuit; The negative electrode of described diode D4 is connected with one end of described resistance R 10, the other end of described resistance R 10 is connected with one end of described the 4th controlled switch, the other end of described the 4th controlled switch be connected with one end of described resistance R 12 and their tie point as the output of described second time brachium pontis drive circuit, the other end of described resistance R 12 is connected with the outflow of bus current end of described the 4th voltage driven type device; The control end of described the 4th controlled switch is as the control end of described second time brachium pontis drive circuit.
In the present embodiment, described voltage driven type device all has three terminals, and wherein two terminals are the terminals that are bound up on the circulation main circuit current in main circuit, and the 3rd end is called as control end, such as the grid of power MOSFET and IGBT.The conducting of voltage driven type device or shutoff are to control by apply certain signal between its control end and a main circuit terminal, this main circuit terminal is the common port of drive circuit and main circuit, it is generally that terminal that main circuit current flows out voltage driven type device, such as the source electrode of power MOSFET and the emitter of IGBT, another main circuit terminal is that terminal that main circuit current flows into voltage driven type device, such as the drain electrode of power MOSFET and the collector electrode of IGBT.
A kind of drive circuit without additional driving power that the utility model provides, on described first, brachium pontis drive circuit forms the charge circuit of electric capacity E1 by working power, diode D1, electric capacity E1 and resistance R 7, in the time that the first controlled switch is closed, the discharge loop that described electric capacity E1, resistance R 1, the first controlled switch and resistance R 5 form electric capacity E1 produces the required driving voltage of conducting the first voltage driven type device;
In like manner, on described second, brachium pontis drive circuit forms the charge circuit of electric capacity E2 by working power, diode D2, electric capacity E2 and resistance R 8, in the time that the second controlled switch is closed, the discharge loop that described electric capacity E2, resistance R 2, the second controlled switch and resistance R 6 form electric capacity E2 produces the required driving voltage of the driving device of conducting second voltage.In described first time brachium pontis drive circuit, in the time that the 3rd controlled switch is closed, the loop that described working power and diode D3, resistance R 9, the 3rd controlled switch and resistance R 11 form produces the required driving voltage of the driving device of conducting tertiary voltage; In like manner, in described second time brachium pontis drive circuit, in the time that the 4th controlled switch is closed, the loop that described working power and diode D4, resistance R 10, the 4th controlled switch and resistance R 12 form produces the required driving voltage of conducting the 4th voltage driven type device.The no matter height of the output voltage of described working power, by the size of regulating resistance R1, resistance R 2, resistance R 9 and resistance R 10, all can produce the required driving voltage of voltage driven type device corresponding to conducting, therefore in the time that H bridge drive circuit works is under high-pressure situations, without setting up low-tension supply or pressure unit, the low and high-low pressure of the cost of described a kind of drive circuit without additional driving power is all suitable for.
Embodiment 2
As a kind of drive circuit without additional driving power of an embodiment of the utility model, on the basis of above-described embodiment 1, described working power comprises: polar capacitor C and charge power supply, the positive pole of described charge power supply is connected with the positive pole of described polar capacitor C, and the negative pole of described charge power supply is connected with the negative pole of described polar capacitor C; The positive pole of described polar capacitor C is as the positive pole of described working power; The negative pole of described polar capacitor C is as the negative pole of described working power.
A kind of drive circuit without additional driving power in the present embodiment, select polar capacitor C can ensure the output voltage stabilization of working power, and polar capacitor energy storage is large, is specially adapted to the situation of H bridge drive circuit works at high pressure.
Embodiment 3
As a kind of drive circuit without additional driving power of an embodiment of the utility model, on the basis of above-described embodiment 1 or 2, described voltage driven type device is N-type IGBT, described in each, the collector electrode of IGBT forms the electric current inflow end of corresponding voltage driven type device, described in each, the emitter of IGBT forms the outflow of bus current end of corresponding voltage driven type device, and described in each, the grid of IGBT forms the control end of corresponding voltage driven type device.
A kind of drive circuit without additional driving power in the present embodiment, in voltage driven type device, the through-current capability of IGBT is stronger, simultaneously, the low price of the cost ratio P type IGBT of N-type IGBT, and the control of the control ratio P type IGBT of N-type IGBT is convenient, so described voltage driven type device is all selected N-type IGBT.
Embodiment 4
As a kind of drive circuit without additional driving power of an embodiment of the utility model, on the basis of above-described embodiment 3, described controlled switch is photoelectrical coupler, described in each, in photoelectrical coupler, the collector electrode of photistor forms one end of corresponding controlled switch, described in each, in photoelectrical coupler, the emitter of photistor forms the other end of corresponding controlled switch, and described in each, in photoelectrical coupler, light-emitting diode forms the control end of corresponding controlled switch.
A kind of drive circuit without additional driving power in the present embodiment, components and parts in control circuit can only bear less voltage and electric current under normal circumstances, and voltage and electric current in H bridge drive circuit is larger, not only can accept the control signal of control circuit by selecting photoelectrical coupler, and control circuit and H bridge drive circuit are carried out to electrical isolation, ensured the safety of components and parts in control circuit.
As a kind of specific implementation, shown in Figure 2, described electric capacity E1 and described electric capacity E2 are polar capacitor; Described the first voltage driven type device is that N-type IGBT Q1, the driving device of second voltage are that N-type IGBT Q2, the driving device of tertiary voltage are that N-type IGBT Q3, the 4th voltage driven type device are N-type IGBT Q4; Described the first controlled switch is that photoelectrical coupler 01, described the second controlled switch are that photoelectrical coupler 02, described the 3rd controlled switch are that photoelectrical coupler 03, described the 4th controlled switch are photoelectrical coupler 04.
As other implementations; described electric capacity E1 and electric capacity E2 all can select nonpolar general electric capacity; described voltage driven type device can be selected electric power MOSEFT; described photoelectrical coupler can reception control signals and have a device of electrical isolation function for other; all can realize the purpose of this utility model, belong to protection range of the present utility model.
Embodiment 5
As a kind of drive circuit without additional driving power of an embodiment of the utility model, on the basis of above-described embodiment 4, also comprise over-current detection circuit, described over-current detection circuit comprises an input and an output; The input of described over-current detection circuit is connected with the outflow of bus current end of described the 4th voltage driven type device with the driving device of described tertiary voltage, for gathering by the electric current of the driving device of described tertiary voltage and described the 4th voltage driven type device; The output of described over-current detection circuit is connected with control circuit, for the electric current collecting is exported to control circuit; Described control circuit receives described electric current and in the time that described electric current exceedes predetermined value, stops output drive signal.Can turn-off in time described voltage driven type device, avoid the damage of described voltage driven type device.
Embodiment 6
Shown in Figure 3, as a kind of drive circuit without additional driving power of an embodiment of the utility model, on the basis of above-described embodiment 5, described over-current detection circuit comprises sampling resistor R13, chip ACPL-C790, resistance R 14, resistance R 16, voltage stabilizing didoe D5, direct current 3.3V power supply, one end of described sampling resistor R13 be connected with one end of described resistance R 16 and their tie point as the input of described over-current detection circuit, the other end of described resistance R 16 is connected with the pin 2 of described chip ACPL-C790, the other end of described sampling resistor R13 is connected with the negative pole of described polar capacitor C, one end of described resistance R 14 is connected with the positive pole of described polar capacitor C, the other end of described resistance R 14 is connected with the pin 1 of described chip ACPL-C790 and is connected with the negative electrode of described voltage stabilizing didoe D5, the anode of described voltage stabilizing didoe D5 is connected with the negative pole of described polar capacitor C, the pin 3 of described chip ACPL-C790 is connected with the negative pole of described polar capacitor C with pin 4, the pin 8 of described chip ACPL-C790 is connected with the positive pole of described direct current 3.3V power supply, the pin 5 of described chip ACPL-C790 is connected with the negative pole of described direct current 3.3V power supply with pin 6, the pin 7 of described chip ACPL-C790 is as the output of described over-current detection circuit.
A kind of drive circuit without additional driving power of the present embodiment, is voltage by sampling resistor R13 is set by the current transitions of the input of described over-current detection circuit, more convenient detection; Use chip ACPL-C790 not only can transmit described voltage to described control circuit, H bridge drive circuit and control circuit are carried out to electrical isolation simultaneously, effectively protect the components and parts in control circuit.
Embodiment 7
Shown in Figure 4, as a kind of drive circuit without additional driving power of an embodiment of the utility model, on the basis of above-described embodiment 6, also comprise four Transient Suppression Diode TVS1, TVS2, TVS3, TVS4, one end of each described Transient Suppression Diode is connected with the control end of a described voltage driven type device, and the other end of each described Transient Suppression Diode is connected with the outflow of bus current end of corresponding voltage driven type device.
A kind of drive circuit without additional driving power in the present embodiment, when the moment that control circuit sends Continuity signal, may produce high impulse, voltage driven type device is easily punctured by high impulse, described Transient Suppression Diode is set, in the situation that there is high impulse, the control utmost point of short circuit voltage driven type device and outflow of bus current end, described voltage driven type device is turn-offed, avoid described voltage driven type device failure.
Embodiment 8
Shown in Figure 5, as a kind of drive circuit without additional driving power of an embodiment of the utility model, on the basis of above-described embodiment 7, also comprise the first capacitor C 1 and the second capacitor C 2 that are connected in parallel on described controlled mechanism two ends after series connection.Cause in superpotential situation protection personal safety in thunderbolt.
Obviously, above-described embodiment is only for example is clearly described, and the not restriction to execution mode.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here without also giving exhaustive to all execution modes.And among the protection range that the apparent variation of being extended out thus or variation are still created in the utility model.

Claims (8)

1. without a drive circuit for additional driving power, it is characterized in that, comprising:
Working power, comprises positive pole and negative pole;
H bridge drive circuit, comprise the first voltage driven type device, the driving device of second voltage, the driving device of tertiary voltage, the 4th voltage driven type device and controlled mechanism, wherein, the first voltage driven type device composition H bridge drive circuit first on brachium pontis, the driving device of second voltage composition H bridge drive circuit second on brachium pontis, first time brachium pontis of the driving device composition of tertiary voltage H bridge drive circuit, second time brachium pontis of the 4th voltage driven type device composition H bridge drive circuit, described controlled mechanism is positioned on the cross-bridges of H bridge; The electric current inflow end of the electric current inflow end of described the first voltage driven type device and the driving device of described second voltage is connected and their tie point is connected with the positive pole of working power; The outflow of bus current end of the driving device of described tertiary voltage is connected with the outflow of bus current end of described the 4th voltage driven type device and their tie point is connected with the negative pole of working power; The outflow of bus current end of described the first voltage driven type device is connected with the electric current inflow end of the driving device of described tertiary voltage and their tie point is connected with one end of described controlled mechanism; The outflow of bus current end of the driving device of described second voltage is connected with the electric current inflow end of described the 4th voltage driven type device and their tie point is connected with the other end of described controlled mechanism;
Brachium pontis drive circuit on brachium pontis drive circuit and second on first, each described upper brachium pontis drive circuit includes an input, an output and a control end; The input of each described upper brachium pontis drive circuit is all connected with the positive pole of described working power; The control end of each described upper brachium pontis drive circuit is all connected with control circuit; On first, the output of brachium pontis drive circuit is connected with the control end of described the first voltage driven type device, and the output of brachium pontis drive circuit is connected with the control end of the driving device of described second voltage on second;
First time brachium pontis drive circuit and second time brachium pontis drive circuit, each described lower brachium pontis drive circuit includes an input, an output and a control end; The input of each described lower brachium pontis drive circuit is all connected with the positive pole of described working power; The control end of each described lower brachium pontis drive circuit is all connected with control circuit; The output of first time brachium pontis drive circuit is connected with the control end of the driving device of described tertiary voltage, and the output of second time brachium pontis drive circuit is connected with the control end of described the 4th voltage driven type device;
On described first, brachium pontis drive circuit comprises: diode D1, electric capacity E1, resistance R 7, resistance R 1, resistance R 5 and the first controlled switch, and the anode of described diode D1 is as the input of brachium pontis drive circuit on described first; The negative electrode of described diode D1 is connected with one end of described electric capacity E1, and the other end of described electric capacity E1 is connected with one end of described resistance R 7, and the other end of described resistance R 7 is connected with the negative pole of described working power; The tie point that the negative electrode of described diode D1 is connected with one end of described electric capacity E1 is connected with one end of described resistance R 1, the other end of described resistance R 1 is connected with one end of described the first controlled switch, the other end of described the first controlled switch be connected with one end of described resistance R 5 and their tie point as the output of brachium pontis drive circuit on described first, the other end of described resistance R 5 is connected with the outflow of bus current end of described the first voltage driven type device; The control end of described the first controlled switch is as the control end of brachium pontis drive circuit on described first;
On described second, brachium pontis drive circuit comprises: diode D2, electric capacity E2, resistance R 8, resistance R 2, resistance R 6 and the second controlled switch, and the anode of described diode D2 is as the input of brachium pontis drive circuit on described second; The negative electrode of described diode D2 is connected with one end of described electric capacity E2, and the other end of described electric capacity E2 is connected with one end of described resistance R 8, and the other end of described resistance R 8 is connected with the negative pole of described working power; The tie point that the negative electrode of described diode D2 is connected with one end of described electric capacity E2 is connected with one end of described resistance R 2, the other end of described resistance R 2 is connected with one end of described the second controlled switch, the other end of described the second controlled switch be connected with one end of described resistance R 6 and their tie point as the output of brachium pontis drive circuit on described second, the other end of described resistance R 6 is connected with the outflow of bus current end of the driving device of described second voltage; The control end of described the second controlled switch is as the control end of brachium pontis drive circuit on described second;
Described first time brachium pontis drive circuit comprises: diode D3, resistance R 9, resistance R 11 and the 3rd controlled switch, and the anode of described diode D3 is as the input of described first time brachium pontis drive circuit; The negative electrode of described diode D3 is connected with one end of described resistance R 9, the other end of described resistance R 9 is connected with one end of described the 3rd controlled switch, the other end of described the 3rd controlled switch be connected with one end of described resistance R 11 and their tie point as the output of described first time brachium pontis drive circuit, the other end of described resistance R 11 is connected with the outflow of bus current end of the driving device of described tertiary voltage; The control end of described the 3rd controlled switch is as the control end of described first time brachium pontis drive circuit;
Described second time brachium pontis drive circuit comprises: diode D4, resistance R 10, resistance R 12 and the 4th controlled switch, and the anode of described diode D4 is as the input of described second time brachium pontis drive circuit; The negative electrode of described diode D4 is connected with one end of described resistance R 10, the other end of described resistance R 10 is connected with one end of described the 4th controlled switch, the other end of described the 4th controlled switch be connected with one end of described resistance R 12 and their tie point as the output of described second time brachium pontis drive circuit, the other end of described resistance R 12 is connected with the outflow of bus current end of described the 4th voltage driven type device; The control end of described the 4th controlled switch is as the control end of described second time brachium pontis drive circuit.
2. a kind of drive circuit without additional driving power according to claim 1, it is characterized in that, described working power comprises: polar capacitor C and charge power supply, the positive pole of described charge power supply is connected with the positive pole of described polar capacitor C, and the negative pole of described charge power supply is connected with the negative pole of described polar capacitor C; The positive pole of described polar capacitor C is as the positive pole of described working power; The negative pole of described polar capacitor C is as the negative pole of described working power.
3. a kind of drive circuit without additional driving power according to claim 2, it is characterized in that, described voltage driven type device is N-type IGBT, described in each, the collector electrode of IGBT forms the electric current inflow end of corresponding voltage driven type device, described in each, the emitter of IGBT forms the outflow of bus current end of corresponding voltage driven type device, and described in each, the grid of IGBT forms the control end of corresponding voltage driven type device.
4. a kind of drive circuit without additional driving power according to claim 3, it is characterized in that, described controlled switch is photoelectrical coupler, described in each, in photoelectrical coupler, the collector electrode of photistor forms one end of corresponding controlled switch, described in each, in photoelectrical coupler, the emitter of photistor forms the other end of corresponding controlled switch, and described in each, in photoelectrical coupler, light-emitting diode forms the control end of corresponding controlled switch.
5. a kind of drive circuit without additional driving power according to claim 4, is characterized in that, also comprises over-current detection circuit, and described over-current detection circuit comprises an input and an output; The input of described over-current detection circuit is connected with the outflow of bus current end of described the 4th voltage driven type device with the driving device of described tertiary voltage, for gathering by the electric current of the driving device of described tertiary voltage and described the 4th voltage driven type device; The output of described over-current detection circuit is connected with control circuit, for the electric current collecting is exported to control circuit; Described control circuit receives described electric current and in the time that described electric current exceedes predetermined value, stops output drive signal.
6. a kind of drive circuit without additional driving power according to claim 5, it is characterized in that, described over-current detection circuit comprises sampling resistor R13, chip ACPL-C790, resistance R 14, resistance R 16, voltage stabilizing didoe D5, direct current 3.3V power supply, one end of described sampling resistor R13 be connected with one end of described resistance R 16 and their tie point as the input of described over-current detection circuit; The other end of described resistance R 16 is connected with the pin 2 of described chip ACPL-C790; The other end of described sampling resistor R13 is connected with the negative pole of described polar capacitor C; One end of described resistance R 14 is connected with the positive pole of described polar capacitor C, the other end of described resistance R 14 is connected with the pin 1 of described chip ACPL-C790 and is connected with the negative electrode of described voltage stabilizing didoe D5, and the anode of described voltage stabilizing didoe D5 is connected with the negative pole of described polar capacitor C; The pin 3 of described chip ACPL-C790 is connected with the negative pole of described polar capacitor C with pin 4, the pin 8 of described chip ACPL-C790 is connected with the positive pole of described direct current 3.3V power supply, the pin 5 of described chip ACPL-C790 is connected with the negative pole of described direct current 3.3V power supply with pin 6, and the pin 7 of described chip ACPL-C790 is as the output of described over-current detection circuit.
7. a kind of drive circuit without additional driving power according to claim 6, it is characterized in that, also comprise four Transient Suppression Diodes, one end of each described Transient Suppression Diode is connected with the control end of a described voltage driven type device, and the other end of each described Transient Suppression Diode is connected with the outflow of bus current end of corresponding voltage driven type device.
8. a kind of drive circuit without additional driving power according to claim 7, is characterized in that, also comprises two electric capacity that are connected in parallel on described controlled mechanism two ends after series connection.
CN201420077320.2U 2014-02-24 2014-02-24 Drive circuit without added driving power supplies Withdrawn - After Issue CN203788205U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103929104A (en) * 2014-02-24 2014-07-16 陈通朴 Drive circuit without extra drive power source
CN105576946A (en) * 2015-12-28 2016-05-11 上海数明半导体有限公司 Power tube driving circuit and method

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103929104A (en) * 2014-02-24 2014-07-16 陈通朴 Drive circuit without extra drive power source
CN103929104B (en) * 2014-02-24 2016-02-24 陈通朴 Without the drive circuit of additional driving power
CN105576946A (en) * 2015-12-28 2016-05-11 上海数明半导体有限公司 Power tube driving circuit and method
CN105576946B (en) * 2015-12-28 2018-09-25 上海数明半导体有限公司 Power tube drive circuit and method

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