JPH06225518A - Insulating electricity-feeding means using capacitance means and insulating electricity-feeding means using inductance means - Google Patents

Abstract

PURPOSE:To reduce the number of switches by a method wherein a noncontrollable switch is connected across an input and one end of a capacitance, a noncontrollable switch is connected across the input and an output, a switch is connected across the input and the other end of the capacitance and a switch is connected across the input and the output. CONSTITUTION:A diode 3 is connected across an input terminal 51 and one end of a capacitor 5 and a diode 4 is connected in series across the terminal 51 and an output terminal 53 so as to make their directions uniform. A switch 16 is connected across an input terminal 52 and the other end of the capacitor 5, and a switch 17 is connected across the terminal 52 and an output terminal 54. Consequently, electric power can be supplied while an input is insulated from an output on condition that the potential difference between the terminals 51, 53 is a potential difference which biases backward at least one of the diodes 3, 4. In addition, since the diodes 3, 4 play a role of a three-terminal switching means, the number of switching means which can be turned on and off can be reduced.

Description

Detailed Description of the Invention

[0001]

The first aspect of the present invention relates to an insulated power feeding means capable of supplying electric power with a small number of parts while conditionally insulating the input and output. Therefore,
The present invention is very convenient when a large number of insulated power feeding means are formed in a circuit, particularly in an integrated circuit.

[0002]

The second aspect of the present invention relates to a two-terminal type inductance means (example: coil), or a three-terminal type or four-terminal type transformation means (example: transformer) in which input and output thereof are not insulated. Device) to supply electric power while insulating between its input and output. For this reason, the input and output can be insulated without using a transformer that isolates the input and output, which is convenient because there are more options. The second aspect of the present invention further relates to an insulated power feeding means capable of insulating between the input and output of the insulating power feeding means with a small number of parts by condition with further development. Therefore,
The latter is very convenient in the case of forming a large number of insulated power feeding means in a circuit, particularly in a hybrid type integrated circuit.

[0003]

BACKGROUND OF THE INVENTION First, the first aspect of the invention will be described in its entirety. A conventional insulated power feeding means is shown in FIGS. The circuit of FIG. 4 is also conceivable. The left side of each figure is the input side. The circuit operation of FIG. 2 is as follows. While the three-terminal switches 6 and 11 are in the input terminals 9 and 10, the energy supply means (eg, DC power supply, AC power supply, etc., not shown) connected to the input terminals 9 and 10 connects the capacitor 5 to each other. To charge. After that, the three-terminal switches 6 and 11 are simultaneously switched to the output terminals 12 and 13, and the capacitor 5 outputs the voltage from the output terminals 12 and 13. In the circuit of FIG. 3, two terminal switches 14 to 17 are used,
A pair of 2-terminal switches 14 and 15 and a 2-terminal switch 1
This circuit is, after all, the same as the circuit of FIG. 2 because each of the pairs 6 and 17 performs the three-terminal switch function.

Since the input and output of these three circuits are reversible, the input and output may be reversed. Further, although mechanical switching means may be used for the three-terminal switches 6 and 11 or the two-terminal switches 14 to 17 to manually operate these, normally, an electromagnetic contact relay, a semiconductor relay, a semiconductor switch, or the like. Isolation switch using is used. Furthermore, in order to supply electric power while isolating the input and output in the circuit of FIG.
, Or both, and switch 15,
Either or both of 17 are not turned on at the same time.

5 to 7 show examples of isolation switches. M
If it is not a reverse blocking type like OS-FET, it is necessary to connect one diode in series as shown in each figure. In the circuit of FIG. 6, the high frequency voltage is input to the input terminals 18 and 19, and the transistor 20 is turned on. In addition, there is also a method of performing insulation drive by a piezoelectric conversion means. After all, two of these isolation switches are connected in series to function as a three-terminal switch. By the way, if an insulating transformer or a pair of light-emitting and light-receiving diodes is used to drive a semiconductor switch, it can be said that it is quicker to use it for insulated power supply from the beginning, but a small output current capacity or low Since it is not possible to supply a large current or a high voltage with the output voltage or the like, it makes sense in such a configuration.

[0006]

[Problems of the Background Art of the First Invention] However, on,
There is a problem that the number of switching means that can be turned off is large in each circuit of FIGS. This is also disadvantageous in terms of cost reduction and space reduction. This is because when using an electromagnetic contact relay, etc., there are problems such as wear of contacts, increase in contact resistance, contact failure, and arc discharge that occurs when the contacts are closed, which is a problem in terms of durability, reliability, and radio interference. This is because it is better that the number of contact points is smaller. Also, when a three-terminal switch is configured by using the isolation switches of FIGS. 5 to 7, if the drive circuit, control circuit, and (reverse blocking diode) are included, the number of parts increases and the configuration becomes complicated. As expected, the smaller the number, the better.

[0007]

SUMMARY OF THE INVENTION Therefore, according to the first aspect of the present invention, the number of switching means that can be turned on and off is small, and it is possible to supply power while conditionally insulating the input and output. Is intended to provide.

[0008]

DISCLOSURE OF THE INVENTION The first aspect of the present invention includes first and second input terminals forming a pair for inputting energy from the first energy supply means. There is a pair of first and second output terminals, each of which has a potential that is indefinite with respect to each of the potentials of the input terminals and outputs a pair of energy for outputting energy. A first uncontrollable switch is connected in between, and a second uncontrollable switch is connected between the one end and the first output terminal in the same direction as the first uncontrollable switch; Second
A first switching means is connected between the input terminal and the other end of the first capacitance means, and a second switching means is connected between the other end and the second output terminal. It is the insulated feeding means used.

As a result, both the non-controllable switches are alternately turned on and off in accordance with the respective switch states of the first and second switching means, and act like a three-terminal switching means. Instead of requiring two control switches, only two switching means can be turned on and off. (Effect) For this reason, it is more effective to connect two uncontrollable switches in series than to form two-terminal switching means by connecting two insulation switches in FIG. 5 to FIG. 7 in series. Since the drive circuit and the like are unnecessary, the configuration is simple and the number of parts is reduced.

The operation is as follows. When the first switching means is on and the second switching means is off, the energy supply means receives the energy from the input terminals via the first uncontrollable switch and the first switching means. Energizing the first capacitance means. At this time, the second uncontrollable switch is off unless it is forward-biased, so that the input and output are in an insulated state. On the other hand, when the first switching means is off and the second switching means is on,
The charged first capacitance means outputs a voltage between the output terminals via the second uncontrollable switch and the second switching means. At this time, since the first uncontrollable switch is off unless it is forward-biased, the input and output are in an insulated state.

As a result, "unless the first and second uncontrollable switches are forward biased at the same time by the potential difference between the first input terminal and the first output terminal", that is, "the first input terminal". -As long as the potential difference between the first output terminals is such that at least one of the first and second uncontrollable switches is reverse biased to be turned off ", the input and output are always insulated from each other. After all, the first invention is
The number of switching means that can be turned on and off is small, and electric power can be supplied while insulating the input and output from each other under certain conditions.

In the case where the first present invention is the "insulating power feeding means using capacitance means" or the like according to claim 8, an insulating switch as shown in FIGS. 5 to 7 is added to the first and second switching means. It has the effect of being able to supply power without insulation even if it is not used. However, leakage current at the time of switching each switching means on and off is ignored.

The same applies to the case of the "insulated power supply means using capacitance means" according to the first aspect of the present invention. However, since the energy storage means for forward bias is not necessary, the structure is simple. It also has the effect of reducing the number of parts.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION In order to explain the first invention in more detail, it will be described below with reference to the accompanying drawings. The embodiment of FIG. 1 corresponds to “insulated power supply means using capacitance means” or the like described in claim 1, 2 or 3, and each corresponds to the following respectively. a) The input terminals 51 and 52 are the above-mentioned first and second input terminals. b) The output terminals 53 and 54 are the above-mentioned first and second output terminals. c) The diodes 3 and 4 are the above-mentioned first and second uncontrollable switches. d) The capacitor 5 serves as the first capacitance means described above. e) The switches 16 and 17 serve as the first and second switching means described above. f) The capacitor 30 is the second capacitance means in claim 3.

As can be seen from this circuit configuration, "input terminal 5
1 and the diode 3 and 4 depending on the potential difference between the output terminal 53
Are not forward-biased at the same time, that is, "as long as the potential difference between the input terminal 51 and the output terminal 53 causes at least one of the diodes 3 and 4 to be reverse-biased to the off state", the input and output are insulated from each other. be able to. This is because when the switch 16 and the diode 3 are on, the switch 17 and the diode 4 are off, and when the switch 17 and the diode 4 are on, the switch 16 and the diode 3 are off. Further, the diodes 3 and 4 play the same role as the switches 14 and 15 in the circuit of FIG. 3, and only two switching means that can be turned on and off are required. (Effective
Result)

A power supply means such as a DC power supply or an AC power supply is connected as an energy supply means between the input terminals 51 and 52. Further, an embodiment in which the directions of the diodes 3 and 4 are reversed is also possible, and an embodiment in which the input and output are reversed is also possible. In these cases, the polarity of the charging voltage of the capacitor 5 is opposite to the polarity shown. Further, instead of the switch 16, any switching means that can be turned on and off may be used, such as a mechanical switch, a mercury switch, or a semiconductor switch. The same applies to the switch 17. Then, a selenium rectifier or any other non-controllable switch may be used instead of the diode 3. Diode 4
Is also the same.

The embodiment of FIG. 8 corresponds to "insulating power supply means using capacitance means" or the like described in claim 1, 2, 3 or 4, and the thyristors 55, 56 are the controllable switches according to claim 4. The lower half of FIG. 8 also corresponds to the ON signal output means. In the figure, each connection terminal ct1
The same symbols are connected to ct4. It1 is an input terminal for inputting a start / stop signal for controlling the start and stop of power supply. When this signal rises, the astable multivibrator in the center of the ON signal output means starts to oscillate,
The ON signal output means alternately triggers the thyristors 55 and 56 at regular intervals. The constant interval is the charging time or discharging time of the capacitor 5 and the turn-off of each thyristor.
It is set longer than the sum of times. If a negative resistance element such as a diac is connected between the plus V power supply line and the input terminal it1, this circuit will automatically start operating when the power is turned on. (Reference: No. 6 of JP-A-63-302217)
(Figure)

The embodiment of FIG. 9 corresponds to “insulating power supply means using capacitance means” or the like according to claim 1, 2, 3 or 4, and transistors 57 and 58 are the controllable switches according to claim 4. And the lower half of the circuit diagram also corresponds to the ON signal output means. In the figure, 59 and 60 are A
An ND circuit, 61 is a T flip-flop, 62 is a monostable multivibrator, and 63 is an oscillator circuit. This ON signal output means temporarily supplies an OFF signal to both of the transistors 57 and 58 for a certain period when the transistors 57 and 58 are switched ON and OFF, and then supplies the ON signal to one of them so that the transistors 57 and 58 are not simultaneously turned ON. An off signal is given to the other as it is.

FIG. 10 shows operation waveforms of each part of the circuit of FIG. If the metastable state (low) of the monostable multivibrator 62 is the fixed period and the positive output of the T flip-flop is high during the stable state (high), the transistor 57 is turned on. If the complementary output is high during the stable state, the transistor 58 is turned on. (Reference: Japanese Examined Patent Publication No. 49-21849, Japanese Utility Model Laid-Open No. 1-130566, Japanese Utility Model Laid-Open No. 1-135828, Japanese Patent Laid-Open No. 2-177720) As a power semiconductor switch, two transistors and two diodes are used in this embodiment. Although it is used, if four isolation switches of FIG. 7 are used in the conventional circuit of FIG. 3, four transistors and four diodes are also used. The effect of "is simple" is obvious.

The embodiment of FIG. 11 is defined by claim 1, 2, 3 or 5
It corresponds to the “insulated power supply means using capacitance means” and the like.

In the embodiment of FIG. 12, the present invention is applied to the circuit of FIG. 4, but a diode connected in a bridge also serves as the first or second uncontrollable switch of the first present invention. So you can save one diode. An embodiment in which the direction of each diode is reversed is also possible, and an embodiment in which the input and output are reversed is also possible.

The embodiment shown in FIG. 13 is defined by claim 1, 2, 3 or 6
It corresponds to the “insulated power supply means using capacitance means” and the like.

The embodiment of FIG. 14 is defined by claim 1, 2, 3 or 7
It corresponds to the “insulated power supply means using capacitance means” and the like.

The embodiment shown in FIG. 15 is defined by claims 1, 2, 3, 8,
It corresponds to “insulated power supply means using capacitance means” described in 9, 11, 17 or 18. Each corresponds to each as follows. a) The DC power supplies 23, 22 are the above-mentioned first energy supply means, and the second energy supply means in claim 8. b) The anode terminal of the diode 3 and the source terminal of the transistor 21 are the above-mentioned first and second input terminals. c) The output terminals 31 and 32 are the above-mentioned first and second output terminals. d) The diodes 3, 4, 24 are the above-mentioned first and second uncontrollable switches, and the third uncontrollable switch according to claim 8. e) The capacitors 5, 30, and 26 are the above-mentioned first capacitance means, the second capacitance means in claim 3 and the third capacitance means in claim 11.

F) The transistors 21 and 20 serve as the above-mentioned first and second switching means. g) Zener diode 28 is the voltage drop means in claim 8. h) The gate terminal, the source terminal, and the drain terminal of the transistor 20 are the control terminal ct2 and the main terminal m in claim 8.
For t2a and mt2b. i) The on / off signal output means 25 is the on / off signal output means according to claim 18. j) A closed circuit including the DC power supply 23, the diode 3, the capacitor 5, the Zener diode 28 and the transistor 21 is the first closed circuit in claim 8. k) DC power supply 22, diode 24, capacitor 26,
The closed circuit including the Zener diode 28 and the transistor 21 is also the second closed circuit. l) The closed circuit including the DC power supply 22, the diode 24, the resistor 64, the zener diode 28 and the transistor 21 is also the third closed circuit. m) A closed circuit including the capacitor 26, the resistor 27, and the gate-source capacitance of the transistor 20 is also the fourth closed circuit.

The circuit operation is as follows. When the transistor 21 is on, the DC power supply 23 is the diode 3,
The capacitor 5 is charged via the Zener diode 28 and the transistor 21, and at the same time, the DC power source 22 charges the capacitor 26 via the diode 24, the Zener diode 28 and the transistor 21, while the charging current and the resistance 64 Current is Zener diode 2
The voltage drop across 8 reverse biases transistor 20 and keeps it off. Then, when the transistor 21 is turned off, the transistor 20 is forward-biased by the capacitor 26 and turned on, so that the capacitor 5 is turned on by the diode 4 and the transistor 20.
Supply energy to.

In the case of this embodiment, "diode 3,
In addition to the condition that "4 are not forward-biased at the same time", the condition that "as long as the diodes 24 and 4 are not forward-biased at the same time" is added, the input and output are insulated. Further, as an example of the on / off signal output means 25, there is a rectangular wave oscillator circuit such as an astable multivibrator. If a mechanical switching means is used instead of the transistor 21 to turn it on and off manually, the on / off signal output means 25 is not required. Further, as the voltage drop means in claim 8, instead of the Zener diode 28, a resistor, a diode, a semiconductor switch in which a non-paired control terminal and a main terminal are connected for inputting a drive signal thereof, a resistance means,
Constant current means, constant voltage means, etc. can also be used. If it is a normally-off type like the transistor 20, its voltage drop may be zero. In short, it suffices if the off control voltage can be supplied. Of course, any normally-on type switching device having a self-turn-off function (= self-extinguishing function) can be used instead of the transistor 20.

The third closed circuit for controlling the transistor 20 to be turned off may be a closed circuit including the transistor 21 and the diode 29, or the DC power supply 23, the diode 3, the resistor 65, the zener diode 28 and the transistor 21. It may be a closed circuit including. In the former case, or if the current in resistor 64 or 65 causes the voltage drop across zener diode 28 to always reverse bias transistor 20, an AC power supply may be used in place of DC power supply 22 or 23. Alternatively, if the ON / OFF period of the ON / OFF signal output means 25 is appropriately selected, both charging currents of the capacitors 5 and 26 become zero during the ON period of the transistor 21 to cause a voltage drop in the Zener diode 28. Since the transistor 21 can be turned off before turning off,
Can be controlled by the above-mentioned first or second closed circuit, which also serves as the above-mentioned third closed circuit.

The embodiment shown in FIG. 16 has the following features:
This is an insulated power supply means corresponding to “insulated power supply means using capacitance means” described in 8, 10, 11, 17 or 18 and having the DC power supplies 22 and 23 in common in the circuit of FIG. . If the diode 29 is provided, an AC power supply can be used instead of the DC power supply 22.

The embodiment shown in FIG. 17 has the following features:
Corresponding to "insulating power supply means using capacitance means" described in 8, 9, 12, 17 or 18, the inductance means in claim 12 as the energy storage means in claim 8 in the circuit of FIG. Coil 33
Is an insulated power feeding means. This is effective when the voltage of the DC power supply 22 is lower than the gate forward bias voltage of the transistor 20. Both DC power supplies can be shared and integrated into one.

The embodiment shown in FIG. 18 has the following features:
The capacitor 26 and the coil 33 are used as energy storage means corresponding to "insulated power supply means using capacitance means" described in 8, 10, 13, 17 or 18.

The embodiment shown in FIG. 19 has the following features:
Corresponding to "insulated power supply means using capacitance means" described in 8, 10, 14, 17 or 18, capacitors 5 and 26 are commonly used in the circuit of FIG. 16 and integrated into one, and diodes 3 and 24 are also common. It is an insulated power feeding means that is integrated into one. As a result, there is an advantage that one capacitor and one diode can be saved.
The above-mentioned third closed circuit for controlling the transistor 20 to be off while the transistor 21 is on is the same as the above-mentioned first and second closed circuits for charging the capacitor 5, and
The on / off signal output means turns off the transistor 21 before the charging current of the transistor becomes zero.

In the embodiment shown in FIG. 20, the transistor 35, the resistor 34, the diode 36, and the switch 37 are formed by 3
When the terminal switch is in the ON state of the switch 37, the resistance 34
Current consumption is saved, while the rise of the gate voltage of the transistor 20 is sharpened.

In the embodiment of FIG. 21, a thyristor equivalent circuit is used in place of the transistor 35 in the circuit of FIG. 20, and a transistor 40, a Zener diode 41 and a resistor 39 are used as a constant voltage circuit in order to speed up the charging of the capacitor 5. Compose

The embodiment shown in FIG. 22 has the following features:
It corresponds to “insulating power supply means using capacitance means” described in 8, 10, 14, 17 or 18, and serves to charge the voltage of the capacitor 30 below the gate forward bias voltage of the transistor 20.

The embodiment shown in FIG. 23 has the following features:
It corresponds to “insulated power supply means using capacitance means” described in 8, 10, 15, 17 or 18.

The embodiment shown in FIG. 24 has the following features:
Since the normally-on transistor 66 is used in correspondence with "insulating power supply means using capacitance means" described in 6, 17, or 18, energy storage means is required as in each circuit of FIGS. 15 to 23. The structure is simple and the number of parts is small.

The embodiment shown in FIG. 25 is the "insulating power supply means using capacitance means" according to claim 1, 2, 3 or 5.
Almost two insulated power supply means are used.
In this way, a method of connecting both relay coils so that all the contacts are interlocked by using two electromagnetic relays is also possible.

The embodiment shown in FIG. 26 is an insulated power feeding means to which the embodiment shown in FIG. 19 is applied, and an astable multivibrator 67 controls two insulated power feeding means.

The embodiment of FIG. 27 is an insulated power feeding means to which the embodiment of FIG. 24 is applied, in which an astable multivibrator 67 controls two insulated power feeding means. In order to speed up the turn-off of each normally-on transistor 68, P
Discharge means using an NP-type transistor or the like is provided.

FIG. 28 shows a unidirectional isolation switching circuit using the embodiment of FIG. Both switch terminals 46 and 47 are turned on and off according to an on / off signal input to the input terminal 48. With the transistor 45, this circuit is bidirectional.

The circuit of FIG. 29 also uses the embodiment of FIG.
It is a directional isolation switching circuit which is an improvement of the circuit of FIG. The improvement is that when the transistor 42 is off, it is given a gate reverse bias voltage and at the same time the capacitor 5 is charged.

[0043]

2. Description of the Related Art Conventionally, there is an insulated power supply means for supplying power while insulating between its input and output by using a plurality of switching means and capacitors like the insulated power supply means of FIGS. It was.

[0044]

However, the two-terminal type inductance means (eg, coil) or the three-terminal type or four-terminal type transformer means (eg, transformer) in which the input and the output thereof are not insulated from each other. There was no insulated power supply means for supplying electric power while insulating between the input and the output.

[0045]

Therefore, the second aspect of the present invention is to provide an inductance means (two-terminal type, three-type type) in which input and output are not insulated from each other.
It is an object of the present invention to provide an insulated power supply means that can supply power while insulating between the input and output of the power supply means by using a terminal type and a four terminal type.

[0046]

DISCLOSURE OF THE Second Invention In the second aspect of the present invention, both the input and output inductance means are magnetically coupled,
There is a first inductance means that is electrically connected, and there are first and second input terminals that form a pair for inputting energy from the first energy supply means, and the first and second input terminals. Has an indefinite potential with respect to each potential of, and has a pair of first and second output terminals for outputting energy, and is provided between the first input terminal and one end of the input inductance means. A first switching means is connected, a second switching means is connected between one end of the output inductance means and the first output terminal, and the second input terminal and the other end of the input inductance means are connected. A third switching means is connected between the first and third switching means, and a fourth switching means is connected between the other end of the output inductance means and the second output terminal. A voltage said first inductance means occurs when over down off provided a voltage limiting means for limiting within a predetermined range, a "dielectric feeder means using a inductance means."

As a result, when the first and third switching means are on and the second and fourth switching means are off, the first energy supply means operates from the both input terminals to the first input terminal. , Energy is supplied to the first inductance means via the third switching means and the input inductance means, and at the same time, the second,
The fourth switching means insulates between the input and the output. When the first or third switching means is off and the second and fourth switching means are also off, the voltage limiting means changes the switching means from the surge voltage generated by the first inductance means. Protects against dielectric breakdown. Furthermore, when the first and third switching means are off and the second and fourth switching means are on, the first inductance means and the output inductance means and the second and fourth switching means. Energy is output from the both output terminals via the means, and the first and third switching means insulate the input and the output.

[0048]

As a result, according to the second invention, it is possible to supply the electric power while insulating the input and the output of the power feeding means by using the inductance means in which the input and the output are not insulated. However, since the maximum output voltage is limited by the voltage limiting means, the above-mentioned predetermined range is determined according to the required output voltage and the like.

[0049]

[Effect of the first subordinate concept invention] When the second invention is the "insulated power supply means using the inductance means" described in claim 32, the first and second non-controllable switches in the same claim are the above-mentioned According to the respective switch states of the second and third switching means, they are turned on and off in the opposite manner and act like the first and fourth switching means.
The number of switching means that can be turned on and off instead of two is reduced by two. This effect is "when using two non-controllable switches rather than using the insulating switches and the like in FIGS. 5 to 7 as the second and fourth switching means,
Since a drive circuit and the like for that amount are not required, the configuration is simplified and the number of parts is reduced. ”

The operation is as follows. When the third switching means is on and the second switching means is off, the first energy supply means connects the first uncontrollable switch and the third switching means from the both input terminals. Energy is supplied to the first capacitance means via. At this time, the second uncontrollable switch is off unless it is forward-biased, so that the input and output are in an insulated state. On the other hand, when the third switching means is off and the second switching means is on,
The excited first inductance means outputs energy from between the two output terminals via the second uncontrollable switch and the second switching means. At this time, since the first uncontrollable switch is off unless it is forward-biased, the input and output are in an insulated state.

As a result, "the first and second uncontrollable switches are not forward biased simultaneously due to the potential difference between the first input terminal and the second output terminal and the voltage generated by the first inductance means. As long as the voltage (potential difference) reversely biases at least one of the first and second uncontrollable switches to turn it off.
Input and output are always insulated under the condition. In the end, this subordinate concept invention requires only a small number of switching means that can be turned on and off, and can supply electric power while insulating the input and output from each other under certain conditions.

[0052]

[Effects of the Second Subordinate Conceptive Invention] In the case where the second invention is the "insulated power supply means using the inductance means" or the like described in claim 37, the above-mentioned second and third switching means are provided in FIGS.
There is an effect that insulated power can be supplied without using an insulation switch as shown in FIG. However, leakage current at the time of switching each switching means on and off is ignored.

[0053]

[Effect of Third Subordinate Invention] The second invention is claim 4.
5. "Insulated power supply means using an inductance means"
In such a case, there is an effect that the insulated power can be supplied without using the insulation switch as shown in FIGS. 5 to 7.
Since there is no need for energy storage means for forward bias,
This also has the effect of simplifying the configuration and reducing the number of parts.

[0054]

BEST MODE FOR CARRYING OUT THE INVENTION In order to explain the second invention in more detail, it will be described below with reference to the accompanying drawings. The embodiment of FIG. 30 corresponds to “insulated power supply means using an inductance means” or the like according to claim 19, and each of them corresponds to the following respectively. a) The input terminals 76 and 77 are the above-mentioned first and second input terminals. b) The output terminals 78 and 79 are the above-mentioned first and second output terminals. c) The four-terminal type transformer 75 is the above-mentioned first inductance means. d) The switches 14 to 17 serve as the above-mentioned first to fourth switching means in this order. e) Zener diode 80 connected in series in the opposite direction,
81 is the aforementioned voltage limiting means.

However, Zener diodes 80, 81
The sum of the forward voltage of one side and the Zener voltage of the other side is the input terminal 7
It is larger than the maximum voltage value of the AC or DC power source connected to 6,77. When a DC power source is connected to the input terminals 76 and 77, one of them can be replaced with an ordinary diode. The series circuit of the Zener diodes 80 and 81 is not limited to the connection as shown in the figure, and any two of the transformers 75 can be connected.
Can be connected to terminals.

The embodiment of FIG. 31 corresponds to “insulating power supply means using an inductance means” and the like according to claim 32. Since this embodiment is reversible, an embodiment in which the input and output are reversed is possible, and an embodiment in which the directions of the thyroids in the circuit are reversed is also possible.

Each of the embodiments shown in FIGS. 32 to 82 is possible.
The operation of each transistor in each of the embodiments of FIGS. 69 and 71 is the same as that of the embodiment of FIG. Reference numeral 69 denotes an insulation driving means, which uses a pair of light emitting diode and light receiving diode. Figure 7
In the second embodiment, the series circuit of the diode and the resistor corresponds to the above voltage limiting means. The embodiment of FIG. 77 is shown in FIG.
The embodiment of FIG. 76 is used.

[Brief description of drawings]

FIG. 1 is a circuit diagram showing a circuit of an embodiment of the first invention.

2 to 4 are circuit diagrams showing a circuit of an example of a conventional insulated power feeding means.

5 to 7 are circuit diagrams showing a circuit of an example of a conventional isolation switch.

FIG. 8 to FIG. 9 are circuit diagrams showing a circuit of one embodiment of the first invention.

FIG. 10 is a waveform diagram showing operation waveforms of various portions of the embodiment of FIG.

11 to 22 are circuit diagrams showing a circuit of a first embodiment of the first invention.

FIG. 23 is a circuit diagram showing a circuit of an embodiment of the first and second inventions.

24 to 27 are circuit diagrams showing a circuit of an embodiment of the first invention.

28 to 29 are circuit diagrams showing a unidirectional (or bidirectional) isolation switching circuit using one embodiment of the first invention.

30 to 82 are circuit diagrams showing a circuit of an embodiment of the second invention.

[Explanation of symbols]

 25, 67 Astable multivibrator 59, 60 AND circuit 61 T flip-flop 62 Monostable multivibrator 63 Oscillation circuit 69 Insulation drive means

Claims (47)

[Claims] 1. There is a pair of first and second input terminals for inputting energy from a first energy supply means, and the potential is indefinite with respect to each potential of the first and second input terminals. A pair of first and second output terminals are provided for outputting energy, and a first uncontrollable switch is connected between the first input terminal and one end of the first capacitance means. A second non-controllable switch is connected between the one end and the first output terminal in the same direction as the first non-controllable switch, and the second input terminal and the first capacitance are connected. A first switching means is connected between the other ends of the means, and a second switching means is connected between the other end and the second output terminal. . 2. The insulated power feeding means using the capacitance means according to claim 1, wherein a DC power supply, an AC power supply or a power supply means is used as the first energy supply means. 3. The insulated power feeding means using the capacitance means according to claim 1, wherein a second capacitance means is connected between the both output terminals. 4. An ON signal output means for turning on each of the first and second switching means alternately is provided by using one controllable switch for each of the first and second switching means. An insulated power feeding means using the capacitance means according to claim 1, 2 or 3. 5. An insulated power feeding means using a capacitance means according to claim 1, 2 or 3, wherein a relay means for interlocking a break contact and a make contact is used as the first and second switching means. . 6. Insulation using capacitance means according to claim 1, 2 or 3, characterized in that three-terminal switching means having a three-terminal switching function is used in place of the first and second switching means. Power supply means. 7. The insulated feeding means using the capacitance means according to claim 6, wherein a relay means is used as the three-terminal switching means. 8. The second switching means has a self-turn-off function, and its control terminal and main terminal are a control terminal ct2 and main terminals mt2a and mt2b, and the control terminal ct2 and the control terminal ct2 for inputting a drive signal thereof. When the main terminal mt2a forms a pair, the main terminal mt2a is connected to the other end side to make the main terminal mt2b the second output terminal, and the control terminal is caused by a voltage drop caused by the flowing current. A voltage drop means for applying an off control voltage is provided between ct2 and the main terminal mt2a, and the first switching means is reconnected between the second input terminal and the other end via the voltage drop means, When the first switching means is turned on, the first energy supply means causes the first capacitor via the first uncontrollable switch and the voltage drop means. Forming a first closed circuit for supplying energy to the energy means, and connecting the first switching means and the third uncontrollable switch in series so as to sandwich the second energy supply means, and The second energy supply means forms a second closed circuit for supplying energy to the energy storage means via the third uncontrollable switch and the voltage lowering means when the switching means of the above is turned on, and at the same time, Forming a third closed circuit for controlling off of the second switching means, and forming a fourth closed circuit for forward biasing the second switching means by the energy storage means when the first switching means is off. The insulated power feeding means using the capacitance means according to claim 1, 2 or 3. 9. The insulated power feeding means using the capacitance means according to claim 8, wherein a DC power supply, an AC power supply or a power supply means is used as the second energy supply means. 10. The insulated power feeding means using capacitance means according to claim 9, wherein the same DC power supply, AC power supply or power supply means is used as the first and second energy supply means. 11. The insulated power feeding means using the capacitance means according to claim 8, wherein a third capacitance means is used as the energy storage means. 12. The insulated power feeding means using the capacitance means according to claim 8, 9 or 10, wherein an inductance means is used as the energy storage means. 13. The insulated power feeding means using the capacitance means according to claim 8, 9 or 10, wherein a third capacitance means and an inductance means are used as the energy storage means. 14. The insulated feeding means using the capacitance means according to claim 10, wherein the first capacitance means is used as the energy storage means. 15. The insulated power feeding means using a capacitance means according to claim 14, wherein an inductance means is used in addition to the first capacitance means as the energy storage means. 16. The second switching means is a normally-on type and has a self-turn-off function, and its control terminal and main terminal are control terminal ct2 and main terminals mt2a, m.
t2b, and the control terminal ct2 for inputting its drive signal
When the main terminal mt2a and the main terminal mt2a form a pair, the main terminal mt2a is connected to the other end side and the main terminal mt2b serves as the second output terminal. Control terminal ct2. A voltage drop means for applying an off control voltage is provided between the main terminals mt2a, and the first switching means is reconnected between the second input terminal and the other end via the voltage drop means. Forming a first closed circuit for supplying energy to the first capacitance means via the first uncontrollable switch and the voltage drop means when one switching means is on. At the same time, a second closed circuit for controlling the off of the second switching means is formed, and a third closed circuit for controlling the on of the second switching means is formed when the first switching means is off. Insulated power supply means using the capacitance means according to claim 1, 2 or 3. 17. A resistor, a resistance means, a diode, a zener diode, a semiconductor switch in which a control terminal and a main terminal which are not paired for inputting a drive signal thereof are connected, or a constant voltage means is used as the voltage drop means. Insulated power supply means using the capacitance means according to any one of claims 8 to 16. 18. A controllable switch having a self-turn-off function is used as the first switching means, and an on / off signal output means for turning on / off the controllable switch is provided. Insulated power supply means using the capacitance means according to any one of 1. 19. The first input and output inductance means are magnetically coupled and electrically connected.
Of the first and second input terminals forming a pair for inputting energy from the first energy supply means, and a potential is applied to each potential of the first and second input terminals. There is an indefinite first and second output terminal that makes a pair for outputting energy, and a first switching means is connected between the first input terminal and one end of the input inductance means. A second switching means is connected between one end of the output inductance means and the first output terminal, and a third switching means is connected between the second input terminal and the other end of the input inductance means. And a fourth switching means is connected between the other end of the output inductance means and the second output terminal, and when the first or third switching means is turned off. Insulated power feeding means using the inductance means, characterized in that voltage limiting means for limiting the voltage generated by the first inductance means within a predetermined range is provided. 20. The insulated power supply means using the inductance means according to claim 19, wherein a DC power supply, an AC power supply or a power supply means is used as the first energy supply means. 21. The first capacitance means is connected between the both output terminals, and the first capacitance means is connected.
Insulated power supply means using the inductance means described in 0. 22. A resistor, a resistance means, a diode, a Zener diode as the voltage limiting means, a semiconductor switch, a constant voltage means or a voltage lowering means for connecting a non-paired control terminal and a main terminal for inputting a drive signal thereof. The insulated power feeding means using the inductance means according to claim 19, 20 or 21, characterized in that. 23. The insulated feeding means using the inductance means according to claim 19, 20, 21 or 22, wherein both ends are the same. 24. The insulated power feeding means using the inductance means according to claim 23, wherein the other ends are the same and the input and output inductance means are the same. 25. One controllable switch is used for each of the first to fourth switching means, and the set of the first and third switching means and the set of the second and fourth switching means are alternated. 20. An ON signal output means for turning on and off is provided in the device.
25. An insulated power feeding means using the inductance means according to any one of 24 to 24. 26. One pair of the first and third switching means and one pair of the second and fourth switching means use a pair of break contacts of a relay means, and the other one of the pair of break contacts. An insulated power feeding means using an inductance means according to any one of claims 19 to 24, characterized in that a pair of make contacts interlocking with is used. 27. Insulated power supply using an inductance means according to claim 23, wherein a first three-terminal switching means having a three-terminal switching function is used instead of the first and second switching means. means. 28. A break contact of a relay means is used as one of the third and fourth switching means, and a make contact interlocked with the break contact is used as the other of the third and fourth switching means, and each contact is used as the first three-terminal switching means. 28. The insulated feeding means using the inductance means according to claim 27, wherein a three-terminal switch having a break contact and a make contact interlocked with is used. 29. The insulated power feeding means using the inductance means according to claim 27 or 28, wherein both the other ends are the same, and both the input and output inductance means are the same. 30. Insulated power supply using inductance means according to claim 29, characterized in that a second three-terminal switching means having a three-terminal switching function is used in place of the third and fourth switching means. means. 31. The two 3-terminal switches having a break contact and a make contact, which are interlocking with each other, of relay means are used as the first and second three-terminal switching means. Insulated power supply means using inductance means. 32. A first non-controllable switch is used in place of the first switching means, and a second non-controllable switch is used in place of the fourth switching means so that both directions are the same. 19 to 2 characterized in that
Insulated power supply means using the inductance means according to any one of 4 above. 33. An on-signal output means for turning on the second and third switching means alternately is provided by using one controllable switch for each of the second and third switching means. 33. Insulated power supply means using the inductance means according to claim 32. 34. The insulated power feeding means using the inductance means according to claim 32, wherein a relay means for interlocking a break contact and a make contact is used as the second and third switching means. 35. The insulated power feeding means using the inductance means according to claim 32, wherein three-terminal switching means having a three-terminal switching function is used instead of the second and third switching means. 36. The insulated power feeding means using the inductance means according to claim 35, wherein the three-terminal switching means is a relay terminal which is a three-terminal switch having a break contact and a make contact. 37. The second switching means has a self-turn-off function, and its control terminal and main terminal are a control terminal ct2, main terminals mt2a and mt2b, and the control terminal ct2 and the control terminal ct2 for inputting a drive signal thereof. When the main terminals mt2a form a pair, the main terminals mt2a are connected to one end side of the output inductance means and the main terminals mt2b are used as the first output terminals, and a voltage drop caused by a current flowing therethrough. Is provided with a voltage drop means for applying an off control voltage between the control terminal ct2 and the main terminal mt2a, and the third switching means is connected to the second input terminal and the input inductance means via the voltage drop means. Reconnecting between the other ends, and when the third switching means is on, the first energy supply means is the first uncontrollable Forming a first closed circuit for supplying energy to the first inductance means via the switch and the voltage drop means, and the third switching means and the third uncontrollable switch are second energy supply means. These are connected in series so that the energy is stored in the energy storage means via the third uncontrollable switch and the voltage drop means when the third switching means is turned on. Forming a second closed circuit for supplying, and at the same time forming a third closed circuit for controlling the off of the second switching means, and when the third switching means is off, the energy storage means causes the second 4. A fourth closed circuit for forward biasing the switching means is formed.
Insulated power supply means using the inductance means described in 1. 38. The insulated feeding means using the inductance means according to claim 37, wherein a DC power supply, an AC power supply or a power supply means is used as the second energy supply means. 39. The insulated feeding means using the inductance means according to claim 38, wherein the same DC power supply, AC power supply or power supply means is used as the first and second energy supply means. 40. A second capacitance means is used as the energy storage means.
Insulated power supply means using the inductance means described in 7, 38 or 39. 41. A second inductance means is used as the energy storage means.
Insulated power supply means using the inductance means described in 7, 38 or 39. 42. The insulated feeding means using the inductance means according to claim 37, 38 or 39, wherein a second capacitance means and a second inductance means are used as the energy storage means. 43. The insulated power feeding means using the inductance means according to claim 39, wherein the first inductance means is used as the energy storage means. 44. The insulated power feeding means using an inductance means according to claim 43, wherein a second capacitance means is used in addition to the first inductance means as the energy storage means. 45. The second switching means is a normally-on type and has a self-turn-off function, and its control terminal and main terminal are control terminal ct2 and main terminals mt2a, m.
t2b, and the control terminal ct2 for inputting its drive signal
When the main terminal mt2a and the main terminal mt2a form a pair, the main terminal mt2a is connected to one end side of the output inductance means and the main terminal mt2b is used as the first output terminal, and is generated by the flowing current. A voltage drop means for applying an off control voltage is provided between the control terminal ct2 and the main terminal mt2a by a voltage drop, and the third switching means is connected to the second input terminal and the input inductance via the voltage drop means. Reconnecting between the other ends of the means, the first energy supply means when the third switching means is on, the first energy supply means through the first uncontrollable switch and the voltage drop means Forming a first closed circuit for supplying energy to the means and at the same time forming a second closed circuit for controlling the turning off of said second switching means, Insulating feed means using the inductance means according to claim 32, wherein the third switching means is characterized by forming a third closed circuit to turn on controlling the second switching means when off. 46. A resistor, a resistance means, a diode, a Zener diode, a semiconductor switch in which a non-paired control terminal and a main terminal are connected for inputting a drive signal thereof, or a constant voltage means is used as the voltage drop means. An insulated power feeding means using the inductance means according to any one of claims 37 to 45. 47. A controllable switch having a self-turn-off function is used as the third switching means, and on / off signal output means for turning on / off the switch is provided. Insulated power supply means using the inductance means according to any one of 1.