JPH08630U - Power supply means, capacitive load drive circuit, controllable switch drive circuit, one-way isolated switching circuit, bidirectional isolated switching circuit, isolated three-terminal switching circuit, ignition distribution circuit, switching circuit, and three-terminal switching circuit - Google Patents

Abstract

(57) [Abstract] [Purpose] One is that the DC power source simultaneously charges the reverse voltage supply capacitance means and supplies power to the load, and when the discharge supplies power in the opposite direction, the capacitance means and its Make sure that the loads do not affect each other's applied voltage. [Structure] For example, diodes 4 and 5 sandwich a capacitor 8 between both terminals of a series circuit of a DC power source 1 and a switch 26, and further, these are connected in series in a forward direction to the power source voltage, and both terminals are connected. A load 41 is connected between them, a resistor 10 is connected between the positive side of the capacitor 8 and a negative side of the load 41, and a resistor 11 is connected between the positive side of the load 41 and the negative side of the capacitor 8. I am trying. This produces an effect that the charging voltage of the capacitor 8 and the voltage of the load 41 do not affect each other when the switch 26 is on. When the switch 26 is turned off, the capacitor 8 supplies the load 41 with a voltage opposite to the power supply voltage.

Description

[Detailed description of the device]

[0001]

【Technical field】

 The present invention uses only one DC power source to supply a positive voltage and a negative voltage to the load by turning the switching means on and off, and to supply a load with a voltage of the opposite polarity to that of the power source voltage. It relates to a power supply means capable of supplying or supplying a doubled voltage. By utilizing this, it is possible to easily configure a drive circuit for a capacitive load or a drive circuit for a controllable switch. Furthermore, by using this controllable switch drive circuit, it is possible to conditionally insulate a unidirectional isolated switching circuit, a bidirectional isolated switching circuit, a unidirectional, bidirectional and unidirectional mixed bidirectional isolated type. It is also possible to construct a 3-terminal switching circuit, a fire distribution circuit, a non-insulating switching circuit, and a 3-terminal switching circuit. Therefore, the present invention can be used in a wide range of fields such as power conversion circuits, switching circuits, relays, electronic exchanges, and ignition circuits. The ignition distribution circuit is, for example, a predetermined ignition discharge gap among the ignition discharge gaps connected to the secondary side of each of a plurality of ignition coils (ignition step-up transformers) in an internal combustion engine ignition device or the like. It is a circuit that supplies a high voltage only.

[0002]

[Background technology]

 As a conventional technique, FIG. 2 shows a power supply means for supplying a positive voltage and a negative voltage to a load by turning on / off the switching means without using only one DC power supply. In the circuit of FIG. 2, when the switch 26 is on, the DC power supply 1 charges the capacitor 8 via the load 41. Then, when the switch 26 is turned off, the capacitor 8 supplies the voltage having the opposite polarity to the load 41 via the resistor 14 to the load 41. If the current limiting action of the switch 26 (eg, ON resistance) is insufficient, a resistor or constant current means and a series circuit of the switch 26 may be used instead of the switch 26. Also, instead of the switch 26, any controllable switching means such as a semiconductor switch or a mechanical switch can be used.

FIG. 3 shows a drive circuit of a controllable switch using the transistor 2 as the load 41. The circuit of FIG. 4 is a three-terminal type switching circuit in which two circuits of FIG. 3 are used to form a three-terminal switch. The three terminals are switch terminals t13 to t15. As in this circuit, the diodes 6 and 12 are connected to the upper transistor 2 side in the figure to insulate the DC power supply 1 from the switch terminal t14 only when both transistors 2 are turned off for the first time. You can The circuit of FIG. 5 is a three-terminal switching circuit in which a P-channel transistor 15 is combined with the circuit of FIG. 3, and the built-in diode of the transistor 15 functions as the diode 6 of FIG. 3, and the driving circuit is also configured for the transistor 15. ing.

However, in the circuit of FIG. 2, when the DC power supply 1 charges the capacitor 8, the charging is performed via the load 41, so the maximum value of the charging voltage of the capacitor 8 is from the power supply voltage to the load 41. The voltage is subtracted, and the charging voltage of the capacitor 8 becomes small. The load 41 is also supplied with only the voltage subtracted by the charging voltage. Therefore, there is a problem in the prior art that it is desired that the capacitance means (capacitor 8) for supplying a reverse voltage and the load do not affect the voltage applied to each other. ( problem )

Therefore, an object of the present invention is to provide a power supply means in which a capacitance means for supplying a reverse voltage and a load do not influence each other's applied voltage. Further, a drive circuit for a capacitive load and a drive circuit for a controllable switch using this power supply means, and a one-way isolated switching circuit, a bidirectional isolated switching circuit, an isolated switch using the drive circuit for this controllable switch. It is also an object to provide a 3-terminal switching circuit, an ignition distribution circuit, a switching circuit and a 3-terminal switching circuit.

[0006]

[Discussion of proposal]

 That is, according to the present invention, when a load and a predetermined number of capacitance means are connected in series to form a closed circuit, the closed circuit is formed by connecting the current limiting means between the load means and the DC power source. When all the capacitance means are connected in parallel between both terminals of the series circuit of one switching means, two sets each of which is connected in series so as to sandwich each of the capacitance means with two uncontrollable switches are connected to both ends of the series circuit. The power supply means is connected in parallel to the DC power supply between the terminals as described above while being connected in parallel. However, the number of the capacitance means may be one or may be plural. The number of the current limiting means also varies depending on the number.

As a result, when the first switching means is turned on, the DC power source supplies a voltage to the load and simultaneously charges one or a plurality of the capacitance means. On the other hand, when the first switching means is off, the one or more capacitance means supplies the load with a voltage opposite to the voltage of the DC power supply. If the number of capacitance means is plural, they are connected in series and the sum of all charging voltages is applied to the load. As a result, even if only one DC power source is used, a positive voltage or a negative voltage can be supplied to the load by turning on or off the first switching means, or a voltage double the voltage of the DC power source can be applied to the load. Can be supplied. When the voltage of the DC power supply is prevented from being applied to the load by, for example, connecting an uncontrollable switch to the load, a voltage having a polarity opposite to that of the power supply voltage can be supplied to the load. .

Moreover, when the first switching means is on, the load and the capacitance means are connected in parallel to the DC power source, so that the capacitance means for reverse voltage supply and the load are in opposition to each other. The present invention has the effect that it does not affect the applied voltage. (Effect of this Consideration) The first switching means may be a controllable semiconductor switch or a mechanical switch. Further, each of the current limiting means may be any one as long as it limits the upper limit of the flowing current.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION In order to describe the present invention in more detail, it will be described below with reference to the accompanying drawings. The embodiment shown in FIG. 1 corresponds to the power supply unit according to the first aspect. And each corresponds to each as follows. a) DC power supply 1 is the aforementioned DC power supply. b) The capacitor 8 serves as the aforementioned capacitance means. c) The load 41 is the above-mentioned load. d) The resistors 10 and 11 serve as the above-mentioned current limiting means. e) Diodes 4 and 5 are the aforementioned uncontrollable switches. f) The switch 26 is the above-mentioned first switching means.

The operation is as follows. When the switch 26 is turned on, the DC power supply 1 charges the capacitor 8 via the diodes 4 and 5 and simultaneously supplies the DC voltage to the load 41. After that, when the switch 26 is turned off, the capacitor 8 supplies the voltage reverse to the above to the load 41 through the resistors 10 and 11. At this time, since the capacitor 8 and the load 41 are connected in parallel to the DC power source 1 when the switch 26 is on, the capacitor 8 and the load 41 do not influence each other's applied voltage. (Effects of the Present Invention) The present invention has such effects including this embodiment.

If the current limiting action of the switch 26 (eg, ON resistance, contact resistance, etc.) is insufficient, a resistor or constant current means and a series circuit of the switch 26 are used instead of the switch 26. Further, instead of the resistor 10 or 11, a constant current means such as a constant current diode as a current limiting means, a series circuit of an inductance means such as a coil and a resistance or constant current means, or a MOS / FET in which a drain and a gate are connected is used. Does not matter. Furthermore, instead of the switch 26, a controllable semiconductor switch or a mechanical switch can be used as well as any controllable switching means.

Each of the embodiments shown in FIGS. 6 to 8 can supply the load 41 with a voltage double the power supply voltage when there are a plurality of the capacitance means described above. If a capacitive load is used as the load 41, these power supply means will be a drive circuit for the capacitive load. When a controllable switch is used for the load 41, these power supply means serve as a drive circuit for the controllable switch that supplies a forward bias voltage or a reverse bias voltage to the controllable switch. Examples of one-way isolated switching circuits, bidirectional isolated switching circuits, isolated three-terminal switching circuits, switching circuits, or three-terminal switching circuits using such controllable switch drive circuits 9 to 36.

Finally, the following is supplemented. a) In each of the circuits shown in FIGS. 13 to 15, 20 etc., a forward reverse bias of the drive signal such as N-channel type FET, MOS • FET, IGBT, SIT or positive gate GTO thyristor instead of the transistor 16 is provided. Any switching means having the same voltage polarity as transistor 16 and having a self-turn-off function can be used. However, it is necessary to increase the voltage drop of the voltage drop means according to the magnitude of the required reverse bias voltage. b) In each circuit of FIG. 18, FIG. 19, etc., the forward / reverse bias voltage polarity of the drive signal is P-channel type FET, MOS • FET, IGBT, SIT or negative gate GTO thyristor instead of the transistor 23. Like the transistor 23, any switching means having a self-turn-off function can be used. However, it is necessary to increase the voltage drop of the voltage drop means according to the required reverse bias voltage. c) In each of the circuits of FIGS. 16, 17, 21 to 30, 32, 33, etc., one or both of the bipolar transistors forming the equivalent circuit of the thyristor, the forward reverse bias voltage polarity of the drive signal. However, any switching means with a self-turn-off function can be used. However, it is necessary to increase the voltage drop of the voltage drop means according to the magnitude of the required reverse bias voltage, and the voltage drop means needs to cause a voltage drop for the bidirectional current. In the case of a normally-on type SIT, its PN junction is also included in the voltage drop means.

D) The above-mentioned current limiting means may be any as long as it limits the upper limit of the flowing current. For example, a constant current diode in addition to a resistor, a constant current diode connected between the collector and base of a transistor, a constant current means, a series circuit of coil and resistor, a combination of these, and so on. e) As the voltage drop means, besides the diode, a resistor, a series circuit or a parallel circuit of a resistor and a diode, a constant voltage means, a Zener diode, two Zener diodes connected in series in the opposite direction, There are a combination of a control terminal and a main terminal that are not paired for inputting a drive signal of a normally-off type switching means, and a combination thereof. f) Conditionally insulated two-way insulated switching circuits of any one of FIG. 9, FIG. 3, FIG. 11, FIG. 13, FIG. 14, FIG. 16 to FIG. Insulated three-terminal switching circuits are also possible, which are connected in series in the same direction, inward, or outward. (Corresponding to the insulation type three-terminal switching circuit according to claim 19) g) A bidirectional insulation type switching circuit in which any two one-way insulation type switching circuits are connected in reverse parallel to each other at both switch terminals is also possible. is there . (Corresponding to the bidirectional isolated switching circuit according to claim 18.)

H) Any one of the unidirectional isolated switching circuits and the bidirectional isolated switching circuit connected in reverse parallel or the bidirectional isolated switching circuit of either FIG. 28 or FIG. An insulated three-terminal switching circuit in which the switch terminals are connected in series is also possible. However, the number of types will be further doubled depending on the orientation of the one-way isolated switching circuit. (Corresponding to the insulation type three-terminal switching circuit according to claim 20.) i) Switch any two of the bidirectional insulation type switching circuit connected in antiparallel and the bidirectional insulation type switching circuit of FIGS. 28 and 29. An insulated 3-terminal switching circuit connected in series by terminals is also possible. (Corresponding to the insulated 3-terminal switching circuit according to claim 21.) j) Any one of the switch terminals of the bidirectional insulated switching circuit described above has a primary of an ignition coil (ignition step-up transformer). By connecting a predetermined number of series circuits in which the coils are connected in parallel, it is possible to configure an ignition distribution circuit capable of designating a predetermined ignition coil, that is, an ignition discharge gap connected to the secondary side thereof. (Corresponding to the ignition distribution circuit according to claim 22.)

[Brief description of drawings]

FIG. 1 is a circuit diagram showing an embodiment of a power supply means of the present invention.

FIG. 2 is a circuit diagram showing an example of a conventional power supply means.

FIG. 3 is a circuit diagram showing an example of a drive circuit for a conventional controllable switch.

4 to 5 are circuit diagrams showing an example of a conventional three-terminal switching circuit.

6 to 8 are circuit diagrams showing an embodiment of the power supply means of the present invention.

FIG. 9 is a circuit diagram showing an embodiment of a drive circuit for a controllable switch according to the present invention.

FIG. 10 is a circuit diagram showing an embodiment of a 3-terminal switching circuit of the present invention.

FIG. 11 is a circuit diagram showing an embodiment of a controllable switch driving circuit according to the present invention.

FIG. 12 is a circuit diagram showing an embodiment of a three-terminal switching circuit of the present invention.

13 to 14 are circuit diagrams showing an embodiment of a drive circuit for a controllable switch according to the present invention.

FIG. 15 is a circuit diagram showing an embodiment of a switching circuit of the present invention.

16 to 19 are circuit diagrams showing an embodiment of a drive circuit for a controllable switch according to the present invention.

FIG. 20 is a circuit diagram showing an embodiment of a switching circuit of the present invention.

21 to 25 are circuit diagrams showing one embodiment of a drive circuit for a controllable switch according to the present invention.

26 to 27 are circuit diagrams showing one embodiment of the three-terminal switching circuit of the present invention.

28 to 29 are circuit diagrams showing an embodiment of the bidirectional isolated switching circuit of the present invention.

30 to 33 are circuit diagrams showing an embodiment of an insulated type three-terminal switching circuit of the present invention.

34 to 35 are circuit diagrams showing one embodiment of a drive circuit for a controllable switch according to the present invention.

FIG. 36 is a bidirectional isolated switching circuit of the present invention 1
It is a circuit diagram which shows an Example.

[Explanation of code]

t1 to t6 switch terminals t11 to t20 switch terminals 19 and 21 transistor (IGBT) 24 transistor (normally-on type SIT) 25 transistor (normally-on type MOS / FE)
T)

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical indication location H01L 29/78 H03K 17/687 17/725 Z 9561-5K 17/73 9184-5K H03K 17/687 A 9561-5K 17/73 Z (54) [Title of device] Power supply means, Capacitive load drive circuit, Controllable switch drive circuit, One-way isolated switching circuit, Two-way isolated switching circuit, Isolated 3 Terminal switching circuit, ignition distribution circuit, switching circuit, and 3-terminal switching circuit

Claims (25)

[Scope of utility model registration request] 1. When a load and a predetermined number of capacitance means are connected in series to form a closed circuit, the closed circuit is formed by connecting a current limiting means between the load means and a DC power source and a first switching device. When all the capacitance means are connected in parallel between both terminals of the series circuit of the means, each set connected in series so as to sandwich the capacitance means with two uncontrollable switches is connected to the DC power supply between the terminals. The power supply means is characterized by being connected in parallel as described above while being connected in the forward direction. 2. A resistor, a constant current diode, a constant current means, a coil or an inductance means is used as any one of the current limiting means.
Power supply means described. 3. A voltage drop between a control terminal and a main terminal, which constitutes a pair for inputting a drive signal of a second switching means having a self-turn-off function, as one of the current limiting means. A voltage drop means is connected so as to provide a reverse bias voltage, and a resistor, a constant current diode, or a constant current means is connected between the other main terminal and the control terminal thereof, and one of the capacitance means is used. 2. The power supply means according to claim 1, wherein the voltage drop means is included in a current path through which a charging current or a current of the load flows. 4. A non-controllable switch, a Zener diode, a constant voltage means, a resistor, or a non-paired control terminal for inputting a drive signal to the switching means as any one of the voltage drop means. 4. The power supply means according to claim 3, wherein a terminal to which a terminal is connected is used. 5. A PNP type or NPN that constitutes an equivalent circuit of a thyristor as any one of the current limiting means.
Type transistor, a voltage drop means is connected in parallel to the emitter junction so as to apply a reverse bias voltage to the emitter junction, a resistor is connected in parallel to the other emitter junction, and a resistor, a constant resistor is connected between the other collector and emitter. 2. The voltage drop means is included in a current path through which a charging current of any one of the capacitance means or a current of the load flows, using a current diode or a constant current means connected. Power supply means. 6. A non-controllable switch, a Zener diode, a constant voltage means, a resistor, or a non-paired control terminal for inputting a drive signal of the switching means as any one of the voltage drop means. 6. The power supply means according to claim 5, wherein a terminal to which a terminal is connected is used. 7. One of the equivalent circuits of the thyristor
7. Power supply means according to claim 5 or 6, characterized in that a genuine GTO thyristor or SI thyristor is used instead of one. 8. A PNP type or NPN forming an equivalent circuit of a thyristor as any one of the current limiting means.
Type voltage drop means is connected in parallel to each emitter junction so as to apply a reverse bias voltage to each emitter junction, and a resistor, a constant current diode or a constant current diode is connected between one base and the other base or emitter. One of the voltage drop means is included in each current path through which any two of one or a plurality of the charging currents of the capacitance means or the current of the load flows by using a current means connected. The power supply means according to claim 1. 9. An uncontrollable switch, a Zener diode, a constant voltage means, a resistor, or a non-paired control terminal for inputting a drive signal of a switching means as any one of the voltage drop means. 9. The power supply means according to claim 8, wherein a terminal connected to the terminal is used. 10. The power supply according to claim 8, wherein a genuine GTO thyristor or SI thyristor having a plus gate and a minus gate is used in place of any one of the equivalent circuits of the thyristor. means. 11. A voltage drive type switching means using a negative drive voltage as a forward bias voltage is used in place of any one of the PNP type transistors, and a bidirectional voltage drop is used as the voltage drop means connected thereto. The power supply means according to claim 8 or 9, characterized by using means. 12. A voltage drive type switching means using a positive drive voltage as a forward bias voltage is used in place of any one of the NPN type transistors, and a bidirectional voltage drop is used as the voltage drop means connected thereto. Power supply means according to claim 8, 9 or 11, characterized in that means is used. 13. The drive circuit for a capacitive load according to claim 1, wherein a capacitive load is used as the load. 14. A drive circuit for a controllable switch, characterized in that the controllable switch is used as the load in the power supply means according to any one of claims 1 to 12. 15. The controllable switch drive circuit according to claim 14, wherein the DC power supply reverse biases the controllable switch when the first switching means is ON, and the DC power supply and the controllable switch are connected to each other. The first switching means is connected between the control terminals, and the first non-connector is connected between the control terminal and the main terminal of the pair for inputting the drive signal of the controllable switch and the DC power supply. A one-way isolated switching circuit comprising a controllable switch and a second non-controllable switch connected to the main terminal to form a one-way controllable switch. 16. The unidirectional isolated switching circuit according to claim 15, wherein the controllable switch is a unidirectional controllable bidirectional switch, and the second uncontrollable switch is another unidirectional controllable bidirectional switch. A non-controllable switch in the switch is used, the drive signals of both of the one-way controllable bidirectional switches have the same reverse bias voltage polarity, and both control terminals are connected to each other. Switching circuit. 17. The unidirectional isolated switching circuit according to claim 15, wherein the second uncontrollable switch and four third to fifth uncontrollable switches are used to form a bridge connection rectifier circuit. A bidirectional isolated switching circuit in which the controllable switch is connected between the two DC terminals. 18. A bidirectional isolated switching circuit, wherein the one-way isolated switching circuit according to claim 15 and the one-way isolated switching circuit according to claim 15 are connected in antiparallel. 19. The one-way isolated switching circuit according to claim 15 and the one-way isolated switching circuit according to claim 15 are connected in series in the same direction, inward, or outward. Insulated 3-terminal switching circuit. 20. An insulated three-terminal switching circuit, wherein the one-way insulated switching circuit according to claim 15 and the bidirectional insulated switching circuit according to claim 16, 17 or 18 are connected in series. 21. A bidirectional isolated switching circuit according to claim 16, 17 or 18 and claim 16, 17 or 18
An insulated three-terminal switching circuit in which the bidirectional isolated switching circuits described above are connected in series. 22. A predetermined number of series circuits in which primary coils of ignition coils are connected in series to the switch terminal side of the bidirectional isolated switching circuit according to claim 16, 17 or 18 are connected in parallel. Ignition distribution circuit. 23. The insulated switching circuit according to claim 15, wherein a second DC power supply is provided between the main terminal of the controllable switch which is not paired with the control terminal and the DC power supply in the one direction. A switching circuit characterized by being connected in the direction of a controllable switch. 24. The controllable switch drive circuit according to claim 14 and the switching circuit according to claim 23 are combined, and the former controllable switch and the one-way controllable switch are connected to both power supply terminals of the second DC power supply. A three-terminal switching circuit connected in series between the two first DC power supplies in common. 25. The controllable switch drive circuit according to claim 14, wherein the controllable switch and the drive voltage are arranged in this order.
A three-terminal switching circuit, characterized in that there is a fourth switching means having reverse polarities opposite to each other, and both control terminals and main terminals are connected so that both are turned on and off in reverse.