TWI625936B - Electronic switch device and electronic switch system - Google Patents

Abstract

The invention provides an electronic switch device and an electronic switch system that can perform control that is not easy to compete with other electronic switch devices. The electronic switching device (1) includes a switching unit (Q1), a control unit (5), a voltage monitoring unit (32), and a determination unit (53). The switch section (Q1) is electrically connected between the AC power source (11) and the load (12), and switches conduction and non-conduction between the AC power source (11) and the load (12). The control section (5) is a control switch section (Q1). The voltage monitoring unit (32) monitors the voltage across the switching unit (Q1), that is, the voltage between the switches (Vsw). The judging unit (53) judges the switching units of other electronic switching devices (1, 1B) that are electrically connected between the AC power source (11) and the load (12) based on the monitoring results of the voltage monitoring unit (32). (Q1) is the operating state of other switch units (Q14).

Description

Electronic switch device and electronic switch system

The present invention generally relates to an electronic switching device and an electronic switching system, and more particularly, to an electronic switching device and an electronic switching system including a switching portion electrically connected between an AC power source and a load.

An electronic switch device (with an infrared sensor automatic switch) that detects the infrared radiation emitted from the human body and turns on / off the load has been known (for example, refer to Patent Document 1 [Japanese Published Patent Publication No. 2000-131456]) ). The electronic switching device described in Patent Document 1 is connected in parallel between a connection terminal, a primary winding of a current converter, a full-wave rectifier, and a load control circuit having a bidirectional thyristor fluid that controls on / off of power supply to a load in parallel. connection.

In the electronic switching device described in Patent Document 1, a power supply circuit is connected between the DC output terminals of the full-wave rectifier. The power supply circuit is a constant voltage circuit that generates a control power supply (operation power supply) for a control IC (Integrated Circuit), and supplies power when the load is not energized. When the load is energized, the auxiliary power supply circuit supplies power to the constant-voltage circuit by the current flowing to the secondary winding of the current converter.

In addition, in an electronic switching system including a plurality of electronic switching devices, one load may be controlled by the plurality of electronic switching devices. At this time, it is desirable that the electronic switching device implements control that is not easily coincident with control of other electronic switching devices.

The present invention has been made in view of the above-mentioned circumstances, and an object thereof is to provide an electronic switch device and an electronic switch system that can perform control that is difficult to coincide with control of other electronic switch devices.

An electronic switching device according to an aspect of the present invention includes a switching unit, a control unit, a voltage monitoring unit, and a determination unit. The switch unit is electrically connected between the AC power source and the load, and switches conduction / non-conduction between the AC power source and the load. The control unit controls the switch unit. The voltage monitoring unit monitors the voltage across the switching unit, that is, the magnitude of the voltage between switches. The determining unit determines the operating states of the other switching units, that is, the switching units of other electronic switching devices that are electrically connected between the AC power source and the load, based on the monitoring results of the voltage monitoring unit.

An electronic switch system according to an aspect of the present invention includes a plurality of the electronic switch devices. The plurality of switching units included in the plurality of electronic switching devices are electrically connected in parallel between the AC power source and the load.

(Embodiment 1) (1) Overview The electronic switching devices 1A and 1B according to Embodiment 1 are electrically connected between the AC power source 11 and the load 12, as shown in FIG. 2, and are switched from the AC power source 11 to the load. 12 Wiring appliances in the energized state. The electronic switching devices 1A and 1B are mounted on, for example, a house wall. The AC power source 11 is, for example, a single-phase commercial power source of 100 [V] and 60 [Hz]. The load 12 is, for example, a lighting device including a light source including an LED (Light Emitting Diode) and a lighting circuit that lights the light source. At this load 12, when power is supplied from the AC power source 11, the light source is turned on.

In the example shown in FIG. 2, two electronic switching devices 1A and 1B constitute an electronic switching system 10. In other words, the electronic switching system 10 includes a plurality (here, two) of electronic switching devices 1A and 1B. The two electronic switching devices 1A and 1B have a common structure. Hereinafter, when the two electronic switching devices 1A and 1B are not particularly distinguished, the two electronic switching devices 1A and 1B are both referred to as "electronic switching device 1".

The electronic switching device 1 includes a switching unit Q1 composed of a semiconductor switch such as a two-way brake fluid and a transistor. The electronic switching device 1 electronically switches the conduction and non-conduction between the AC power source 11 and the load 12 by controlling the switching section Q1 electronically. That is, the electronic switching device 1 includes a switching unit Q1 electrically connected between the AC power source 11 and the load 12.

In this embodiment, the electronic switching device 1 is a so-called three-way switch capable of connecting three wires. The electronic switching device 1 includes three connection terminals (a first connection terminal, a second connection terminal, and a third connection terminal) 101, 102, and 103. Therefore, in the electronic switching system 10 combining the two electronic switching devices 1A and 1B, the energized state of the load 12 can be switched, for example, at two places above and below the stairs of the building. In other words, when the electronic switch devices 1A and 1B are respectively provided on the upper and lower parts of the stairs, even if any one of the electronic switch devices 1A and 1B is operated, the power-on state of the load 12 provided on the stairs can be switched.

In the example of FIG. 2, the connection terminal 101 of the electronic switching device 1A (hereinafter also referred to as “first electronic switching device 1A”) is connected to the load 12. The connection terminal 101 of the electronic switching device 1B (hereinafter also referred to as “second electronic switching device 1B”) is connected to the AC power source 11. The connection terminal 102 of the electronic switching device 1A is connected to the connection terminal 103 of the electronic switching device 1B. The connection terminal 103 of the electronic switching device 1A is connected to the connection terminal 102 of the electronic switching device 1B. In each electronic switching device 1, the connection terminal 101 and the connection terminal 102 are connected inside the electronic switching device 1.

Furthermore, in each electronic switching device 1, the switching unit Q1 is connected between the connection terminal 101 and the connection terminal 103. In other words, in the electronic switching device 1, the connection terminal 101 and the connection terminal 103 are electrically connected via the switch portion Q1. Therefore, in each electronic switching device 1, when the switch portion Q1 is in a conductive (on) state, the connection terminal 101 and the connection terminal 102 and the connection terminal 103 are conducted through the switch portion Q1. Further, in each electronic switching device 1, when the switching portion Q1 is in a non-conducting (off) state, the connection terminals 101 and the connection terminals 102 and 103 become non-conduction. In other words, if the switching section Q1 of the electronic switching device 1 is on, the AC power source 11 and the load 12 will be conductive, and then the electric power will be supplied from the AC power source 11 to the load 12 through the electronic switching device 1. In the present embodiment, the ON state of the switching unit Q1 means not only a state in which the switching unit Q1 is continuously conducting, but also a state in which the switching unit Q1 is intermittently conducting. In other words, the on state of the switching unit Q1 refers to a state where power is supplied from the AC power source 11 to the load 12, and the off state of the switching unit Q1 refers to a state where the power supply from the AC power source 11 to the load 12 is blocked.

In other words, the plurality of switching units Q1 included in the plurality (two here) of the electronic switching devices 1A and 1B are electrically connected in parallel between the AC power source 11 and the load 12. Therefore, in the electronic switching system 10, when the switching portion Q1 of either of the two electronic switching devices 1A and 1B is turned on, the AC power source 11 and the load 12 are turned on, and then the two electronic switching devices 1A and 1B are connected to each other. The AC power source 11 supplies power to the load 12. Therefore, in the electronic switching system 10, the switching state Q1 of the electronic switching device 1A and the switching portion Q1 of the electronic switching device 1B can be switched to the energized state toward the load 12. (2) Details (2‧1) Overall structure of electronic switchgear

Hereinafter, the configuration of the electronic switching device according to this embodiment will be described with reference to FIGS. 1 and 2.

As shown in FIG. 2, the electronic switching device 1 includes a rectifier 2 and a circuit section 3 in addition to the switch section Q1 and the three connection terminals 101, 102, and 103. These switch sections Q1, three connection terminals 101, 102, and 103, the rectifier 2 and the circuit section 3 are housed in a single frame, and the frame is fixed to a wall, etc., so that the electronic switch device 1 can be installed Walls, etc.

The switching unit Q1 is electrically connected between the AC power source 11 and the load 12, and switches conduction and non-conduction between the AC power source 11 and the load 12. In this embodiment, the switch unit Q1 is composed of a three-terminal bidirectional brake fluid (triode flow switch). The switch section Q1 is electrically connected between the connection terminal 101 and the connection terminal 103, and switches the passage and interruption of the bidirectional current between the connection terminal 101 and the connection terminal 103. The control terminal (gate terminal of the bidirectional brake fluid) of the switch section Q1 is electrically connected to the circuit section 3. Thereby, the switch part Q1 is controlled by the switch control part 51 mentioned later. In FIGS. 1 and 2 and the like, the switch portion Q1 is indicated by the same circuit symbol as a mechanical switch having a contact.

The three connection terminals 101, 102, and 103 are all parts where the wiring is electrically and mechanically connected. As described above, the first connection terminal 101 and the third connection terminal 103 are connected to the switch unit Q1. The second connection terminal 102 is an extension terminal of the first connection terminal 101 and is electrically connected to the first connection terminal 101.

The rectifier 2 is composed of a diode bridge. The rectifier 2 performs full-wave rectification of a voltage (hereinafter also referred to as "inter-switch voltage Vsw") applied between both ends of the switching section Q1, and then outputs it to the circuit section 3. Therefore, the circuit section 3 is connected between the DC output terminals of the rectifier 2. The circuit section 3 uses the full-wave rectified power input from the rectifier 2 to generate a “control voltage” required for control of the switching section Q1 and driving of the sensor section 31, for example.

Hereinafter, when the switching portion Q1 of any of the two electronic switching devices 1A and 1B is non-conductive, it is assumed that the switching portion Q1 is applied with an AC voltage Vac from the AC power source 11. In other words, if the two electronic switching devices 1A and 1B are in the off state, the voltage Vsw between the switches will be equal to the AC voltage Vac from the AC power source 11. The polarity of the AC voltage Vac is such that the direction of the arrow in FIG. 2 is positive.

Next, the details of the circuit section 3 will be described with reference to FIG. 1. The circuit section 3 includes a power generation block 4, a control section 5, a sensor section 31, and a voltage monitoring section 32.

The power generation block 4 includes two feeder circuits (a first feeder circuit 41 and a second feeder circuit 42), a power source section 43, and a switching section 44. The power supply unit 43 is configured to be electrically connected between both ends of the switching unit Q1 and to generate a control voltage based on power supplied from the AC power supply 11. The first feed circuit 41 and the second feed circuit 42 are electrically connected in parallel between the switching section Q1 and the power supply section 43. Therefore, two paths including a path including the first feed circuit 41 and a path including the second feed circuit 42 are formed as a path for supplying power from the AC power source 11 to the power source section 43. The switching unit 44 is electrically connected between the switching unit Q1 and any one of the two feeder circuits (the first feeder circuit 41 and the second feeder circuit). The switching unit 44 is configured to switch between a first feeder circuit 41 and a second feeder circuit 42 for a feeder circuit used for a path for supplying power from the AC power source 11 to the power source section 43. Moreover, the “switching feeder circuit” means that the feeder circuit used for supplying power is electrically switched between the first feeder circuit 41 and the second feeder circuit 42, and is not limited to the first feeder circuit 41 and the second feeder circuit 42. Perform a physical switch.

The first feed circuit 41 is composed of a low impedance element having a relatively low impedance. The second feed circuit 42 is configured to include a high-impedance element having a relatively high impedance. As an example of the low impedance element, a load switch including, for example, a PNP bipolar transistor is provided. The load-on relationship is electrically connected in series between the switching section 44 and the power supply section 43. When the load-on relationship is turned on, the impedance of the first feed circuit 41 becomes low. The load switch is not limited to a configuration including a bipolar transistor, and may be a configuration including a MOSFET (Metal Oxide Semiconductor Field Effect Transistor), for example. As an example of the high-impedance element, there is a step-down circuit that steps down an input voltage (inter-switch voltage Vsw) and outputs it to the power supply section 43.

The switching unit 44 is provided with, for example, a semiconductor switch such as a transistor, and is electrically connected between the power input terminal 401 and the first feed circuit 41. The power input terminal 401 is a DC output terminal electrically connected to the positive pole of the rectifier 2. When the switching section 44 is turned on, the first feed circuit 41 is used for a path for supplying power to the power supply section 43, and when the switching section 44 is turned off, the second feed circuit 42 is used for a path for supplying power to the power section 43 . For example, if the low-impedance element is a load switch including a bipolar transistor, the base current flows to the bipolar transistor of the load switch when the switching unit 44 is turned on. The switching unit 44 is controlled by a switching control unit 52 described later. The switching unit 44 switches between a first feeder circuit 41 and a second feeder circuit 42 based on a switching control signal output from the switching control unit 52, and a feeding circuit used in a path for supplying power to the power supply unit 43. In FIG. 1, the switching unit 44 is indicated by the same circuit symbol as a mechanical switch having a contact.

The power supply section 43 includes a capacitor C1 and a regulator 45. The capacitor C1 is electrically connected between the output terminal of each of the first feed circuit 41 and the second feed circuit 42 and the ground (reference potential point). The regulator 45 is a three-terminal regulator (series regulator). The input terminal of the regulator 45 is an output terminal that is electrically connected to a terminal on the high potential side of the capacitor C1, that is, each of the first feed circuit 41 and the second feed circuit 42. The regulator 45 converts the voltage across the capacitor C1 into a predetermined voltage and outputs it. The output terminal of the regulator 45 is equivalent to the output terminal of the power supply section 43 and is electrically connected to the power output terminal 402. The power output terminal 402 is electrically connected to the control unit 5.

In other words, between the DC output terminals of the rectifier 2, the parallel circuit of the first feed circuit 41 and the second feed circuit 42 is electrically connected in series together with the power supply section 43. Between the power input terminal 401 and the ground (reference potential point), a full-wave rectified inter-switch voltage Vsw, that is, a pulse current voltage output from the rectifier 2 is applied. As a result, the capacitor C1 is charged. The power supplied to the power supply unit 43 is supplied to the power supply unit 43 via either the first feed circuit 41 or the second feed circuit 42 in accordance with the connection destination of the power input terminal 401 determined by the switching unit 44.

The “terminals” such as the “power input terminal” in the present embodiment may not be parts (terminals) for connecting electric wires or the like, such as a lead wire of an electronic component or a part of a conductor included in a circuit board.

The control unit 5 is operated by receiving a control voltage from the power generation block 4. The control unit 5 includes a switch control unit 51 that controls the switch unit Q1 and a switching control unit 52 that controls the switching unit 44.

The switch control unit 51 outputs a switch control signal to the control terminal (gate terminal of the bidirectional brake fluid) of the switch unit Q1 based on the detection result of the sensor unit 31. Thereby, the switch control unit 51 controls the switch unit Q1 so as to switch the conduction and non-conduction of the switch unit Q1. Furthermore, when the switch unit Q1 is turned on, the control unit 5 determines the timing of outputting the switch control signal based on the monitoring signal output from the voltage monitoring unit 32. The control section 5 includes a driving circuit for driving the switch section Q1, and the control section 5 directly controls the switch section Q1.

The switching control unit 52 outputs a switching control signal to the switching unit 44 based on the monitoring signal output from the voltage monitoring unit 32. Thereby, the switching control part 52 controls the switching part 44 so that the feeder circuit used for the path | route which supplies electric power to the power supply part 43 may switch between a 1st power feed and a 2nd feed circuit.

The control unit 5 includes, for example, a microcomputer as a main configuration. The microcomputer realizes the function as the control unit 5 by executing a program stored in the memory of the microcomputer on a CPU (Central Processing Unit). The program can be provided in advance in a storage medium such as a microcomputer's memory, a memory card, or through an electric communication line. In other words, the above program is a program for causing the microcomputer to function as the control unit 5.

The sensor section 31 detects whether a person is located in the detection area. The sensor unit 31 includes, for example, a pyroelectric element, and determines whether a person is located in a detection area by detecting infrared rays emitted from a human body. When the sensor section 31 detects that a person is present in the detection area, an opening control instruction for setting the switch section Q1 to the on state is output to the switch control section 51 of the control section 5.

The voltage monitoring unit 32 is configured to monitor (detect) the voltage across the switching unit Q1, that is, the magnitude of the inter-switch voltage Vsw. In this embodiment, the voltage monitoring unit 32 is electrically connected between the DC output terminals of the rectifier 2 and then monitors the magnitude of the inter-switch voltage Vsw after full-wave rectification. The voltage monitoring unit 32 compares the magnitude (absolute 値) of the inter-switch voltage Vsw with a reference 値, and outputs a monitoring signal indicating the comparison result to the control unit 5. The reference frame is a frame set around 0 [V], for example, a number [V]. The voltage monitoring unit 32 can function as a zero-cross detection unit that detects the zero-cross point [0V] of the AC voltage Vac. However, the zero-cross detection point is slightly delayed in time from the zero-cross point [0V] of the AC voltage Vac. .

When the switch control unit 51 receives an open control instruction from the sensor unit 31, it outputs a switch control signal to the switch unit Q1 based on a monitoring signal from the voltage monitoring unit 32. Specifically, the switch control unit 51 turns on the switch unit Q1 when the magnitude of the inter-switch voltage Vsw becomes equal to or greater than the reference value based on a monitoring signal from the voltage monitoring unit 32. The switching unit Q1 is composed of a bidirectional brake fluid as described above. Therefore, when the switching control signal is input, it is turned on, and it becomes non-conductive near the zero crossing point (0 [V]) of the AC voltage Vac from the AC power source 11. Strictly speaking, after the switching part Q1 is turned on, if the current flowing through the switching part Q1 becomes 0 [A], the switching part Q1 will become non-conducting. Therefore, depending on the type of the load 12, there may be a difference in voltage from the AC voltage Vac. When the zero crossing point is earlier, the switching section Q1 becomes non-conducting. Therefore, the switch control unit 51 outputs the switch control signal every half cycle of the AC voltage Vac, thereby turning on the switch unit Q1. That is, the ON state of the switching unit Q1 herein is not only a state where the switching unit Q1 is continuously conducting, but also a state where the switching unit Q1 is intermittently conducting. In addition, when the switch control unit 51 is turned off, the switch control unit 51 does not output a switch control signal to the switch unit Q1, thereby keeping the switch unit Q1 in a non-conducting state.

The switching control unit 52 outputs a switching control signal to the switching unit 44 based on the monitoring signal from the voltage monitoring unit 32 when the switching control unit 51 controls the switching unit Q1 to the off state. Specifically, the switching control unit 52 compares the length of time (hereinafter, referred to as “pulse width”) and the threshold value of the voltage between the switches Vsw based on the monitoring signal from the voltage monitoring unit 32 and the threshold value. The switching control unit 52 outputs a switching control signal to the switching unit 44 so that the first feed circuit 41 is used as a path for supplying power to the power source unit 43 when the pulse width does not reach the threshold value multiple times in a row. The switching control unit 52 outputs a switching control signal to the switching unit 44 so that the second feed circuit 42 is used as a path for supplying power to the power source unit 43 when the pulse width is equal to or larger than the threshold value. That is, the switching control unit 52 determines whether or not the pulse width of the inter-switching voltage Vsw is greater than or equal to the threshold value, and uses a feed circuit for supplying power to the power supply unit 43 between the first feed circuit 41 and the second feed circuit 42. The switching mode is used to control the switching unit 44. The threshold value 设定 is set to approximately one-eighth of one cycle of the AC voltage Vac in this embodiment. In addition, "1/8 of one cycle of the AC voltage Vac" is an example of the threshold value, but it is not limited to this number. The pulse width of the inter-switch voltage Vsw may be a length of time when the magnitude of the inter-switch voltage Vsw does not reach the reference value. At this time, the switching control unit 52 outputs the switching control signal to the switching unit in such a manner that the first feed circuit 41 is used as a path for supplying power to the power source unit 43 when the pulse width is a plurality of times in a state where the pulse width is greater than or equal to the threshold. 44. The switching control unit 52 outputs a switching control signal to the switching unit 44 so that the second feed circuit 42 is used as a path for supplying power to the power source unit 43 when the pulse width does not reach the threshold value.

The switching control unit 52 outputs the switching control signal to the switching unit 44 irrespective of the monitoring signal from the voltage monitoring unit 32 when the switching control unit 51 controls the switching unit Q1 to the on state. In other words, the switching control unit 52 outputs the switching control signal to the switching unit 44 in such a manner that the first feeder circuit 41 is used to supply power to the power source unit 43 while the switching unit Q1 is in the on state. (2‧2) Action

Next, operations of the electronic switching device 1 and the electronic switching system 10 will be described with reference to FIGS. 3 and 4.

FIG. 3 illustrates an operation when the switch unit Q1 of both the first electronic switch device 1A and the second electronic switch device 1B is in the off state. FIG. 4 illustrates an operation when the switch portion Q1 of the first electronic switch device 1A is in the off state and the switch portion Q1 of the second electronic switch device 1B is in the on state. Figures 3 and 4 show the AC voltage "Vac", the switching voltage "Vsw", the monitoring signal "S1a" of the first electronic switching device 1A, and the monitoring signal "S1b" of the second electronic switching device 1B in this order from the upper stage. 2. The state (conduction / non-conduction) of the switching portion Q1 of the second electronic switching device 1B. Regarding "Q1" indicating the state of the switch section Q1, "ON" indicates conduction and "OFF" indicates non-conduction. In the example of Figures 3 and 4, the signal levels of the monitoring signals S1a and S1b are at the L level (Low level) when the magnitude of the inter-switch voltage Vsw is equal to or greater than Vth1. When it does not reach the reference 値 Vth1, it is at the H level (High level).

First, the operation when the switch unit Q1 of both the first electronic switch device 1A and the second electronic switch device 1B is in the off state will be described using FIG. 3.

In FIG. 3, the voltage across the switching portion Q1 of the first electronic switching device 1A is shown, but the voltage across the switching portion Q1 of the second electronic switching device 1B is also two times that of the switching portion Q1 of the first electronic switching device 1A. The terminal voltages are approximately the same. In FIG. 3, the time point t0 is the zero crossing point when the AC voltage Vac moves from the negative polarity to the positive polarity. At time point t1, the magnitude of the inter-switch voltage Vsw exceeds the reference 値 Vth1, and at time t2, the magnitude of the inter-switch voltage Vsw is lower than the reference 値 Vth1. The time point t3 is the zero crossing point when the AC voltage Vac moves from the positive polarity to the negative polarity. At time point t4, the magnitude of the inter-switch voltage Vsw exceeds the reference 値 Vth1, and at time t5, the magnitude of the inter-switch voltage Vsw is lower than the reference 値 Vth1.

In this state, since the switching portions Q1 of both the first electronic switching device 1A and the second electronic switching device 1B are closed, the voltage Vsw between the switches is exchanged with each of the two electronic switching devices 1A and 1B. The voltage Vac is the same voltage. Therefore, the magnitude of the inter-switch voltage Vsw exceeds the reference 値 Vth1 in almost all the periods of the AC voltage Vac, that is, from the time point t1 to the time point t2 and from the time point t4 to the time point t5. Thereby, the length (pulse width) of the period during which the magnitude of the inter-switching voltage Vsw is equal to or greater than the reference 値 Vth1 becomes equal to or greater than the threshold 値. Therefore, for any of the two electronic switching devices 1A and 1B, the second feeder circuit 42 is used as a path for supplying power to the power source section 43.

Next, the operation when the switch unit Q1 of the first electronic switch device 1A is in the off state and the switch unit Q1 of the second electronic switch device 1B is in the on state will be described with reference to FIG. 4.

In FIG. 4, the time point t10 is the zero crossing point when the AC voltage Vac moves from the negative polarity to the positive polarity. At time point t11, the magnitude of the inter-switch voltage Vsw exceeds the reference 値 Vth1, and at time t12 subsequent to the time point t11, the switch Q1 of the second electronic switching device 1B is turned on, and the magnitude of the inter-switch voltage Vsw is lower than the reference 値 Vth1. Time point t13 is the zero crossing point when the AC voltage Vac moves from the positive polarity to the negative polarity. At time t14, the magnitude of the inter-switch voltage Vsw exceeds the reference 値 Vth1, and at time t15 subsequent to time t14, the switching portion Q1 of the second electronic switching device 1B is turned on, and the magnitude of the inter-switch voltage Vsw is lower than the reference 値 Vth1.

In this state, while the switching portion Q1 of the second electronic switching device 1B is turned on, since both ends of the switching portion Q1 of the second electronic switching device 1B are short-circuited, the switch is switched to either of the two electronic switching devices 1A, 1B The inter-voltage Vsw becomes approximately 0 [V].

The switching part Q1 of the second electronic switching device 1B becomes non-conductive near the zero crossing point (0 [V]) of the AC voltage Vac, and is turned on when the magnitude of the inter-switch voltage Vsw exceeds the reference 値 Vth1. While the magnitude of the inter-switching voltage Vsw does not reach the reference 値 Vth1, the monitoring signals S1a and S1b are at the H level, but if the magnitude of the inter-switching voltage Vsw is above the reference 値 Vth1, the monitoring signals S1a and S1b will become the L level. Therefore, in the example of FIG. 4, from the time point t12 when the switching unit Q1 is turned on to the time point t14 when the magnitude of the inter-switch voltage Vsw reaches the reference 値 Vth1, the monitoring signals S1a and S1b become the H level. At t14, the monitoring signals S1a and S1b will become the L level.

When the monitoring signal S1b is at the L level, the switch control unit 51 of the second electronic switching device 1B turns on the switch unit Q1. Therefore, at a time point t12 subsequent to the time point t11 and a time point t15 subsequent to the time point t14, the switching section Q1 of the second electronic switching device 1B is turned on, and the voltage Vsw between the switches becomes approximately 0 [V]. Therefore, at time points t12 and t15, the monitoring signals S1a and S1b will be at the H level. While the switch portion Q1 of the second electronic switching device 1B is in the on state, the second electronic switching device 1B repeats the above-mentioned operation. As a result, the voltage between the switches Vsw is intermittently generated from any of the two electronic switching devices 1A and 1B from the time point t10 to the time point t12 and from the time point t13 to the time point t15, and power is supplied to the power source section 43. .

As described above, during the conducting period of the switching section Q1 (also referred to as another switching section Q14) of the second electronic switching device 1B, the inter-switch voltage Vsw of the first electronic switching device 1A also becomes approximately 0 [V]. Therefore, the control unit 5 of the first electronic switching device 1A can monitor the switching voltage Vsw based on the monitoring signal from the voltage monitoring unit 32, and can detect the switching portion Q1 (the other switching portion Q14 of the second electronic switching device 1B). ) On / off status. That is, in the electronic switching device 1 of this embodiment, the control unit 5 has a function as a determination unit, and can determine the operating state of the other switching unit Q14 of the other electronic switching device 1.

In FIG. 4, in the first electronic switching device 1A, the period during which the magnitude of the inter-switching voltage Vsw is equal to or greater than Vth1 is a short period from time point t11 to time point t12 and from time point t14 to time point t15. In other words, a state where the length (pulse width) of the period between the voltages Vsw of the reference 値 Vth1 or more is less than the threshold 値 is continuously generated a plurality of times. Therefore, in the first electronic switching device 1A, the first feeder circuit 41 is used as a path for supplying power to the power supply section 43.

In the second electronic switching device 1B, the switching control unit 52 controls the switching unit Q1 to be in an on state by the switching control unit 51, and controls the switching unit so that the first feeder circuit 41 is used to supply power to the power source unit 43. 44. (3) advantages

As described above, the electronic switch device (1) according to the first aspect includes a switch unit (Q1), a control unit (5), a voltage monitoring unit (32), and a determination unit. The switch section (Q1) is electrically connected between the AC power source (11) and the load (12), and switches conduction and non-conduction between the AC power source (11) and the load (12). The control unit (5) (switch control unit 51) is a control switch unit (Q1). The voltage monitoring unit (32) monitors the voltage across the switching unit (Q1), that is, the voltage between the switches (Vsw). The judging unit is based on the monitoring result of the voltage monitoring unit (32), and the judging unit is also connected to the switching unit (Q1) of the other electronic switching device (1) electrically connected between the AC power source (11) and the load (12). That is, the operation state of the other switch section (Q14).

According to this configuration, the control unit 5 can control the switching unit (Q1) in consideration of the operating states of other switching units (Q14). That is, according to this configuration, there is an advantage that control with other electronic switching devices (1) can be made difficult to compete with each other.

Moreover, the second aspect of the electronic switching device (1) is the same as the first aspect, wherein the electronic switching device (1) includes a power supply section (43) and two or more feeder circuits (first feeder circuit 41, second feeder). Circuit 42), a switching unit (44), and a switching control unit (52). The power supply section (43) is electrically connected between both ends of the switch section (Q1), and generates a control voltage by supplying power from an AC power supply (11). Two or more feeder circuits (the first feeder circuit 41 and the second feeder circuit 42) are electrically connected between both ends of the switch section (Q1), and become between the switch section (Q1) and the power supply section (43). Access to power. The switching unit (44) switches one of the two or more feeder circuits (the first feeder circuit 41 and the second feeder circuit 42) to a feeder circuit for supplying power. The switching control unit (52) controls the switching unit (44) based on the waveform of the voltage (Vsw) between the switches. The control unit (5) (switch control unit 51) is operated by receiving a control voltage supply from the power supply unit (43).

According to this configuration, as a path for supplying power from the AC power source (11) to the power source section (43), there are two feeder circuits (the first feeder circuit 41 and the second feeder circuit 42). The power supply unit (43) is supplied. The switching of the two feeder circuits (the first feeder circuit 41 and the second feeder circuit 42) is performed according to the voltage (Vsw) between the switches. In the electronic switching device (1), the voltage monitoring section (32) monitors the voltage (Vsw) between the switches, and can detect the on / off state of the switching section (Q1) of other electronic switching devices (1). For example, when the switch part (Q1) of the first electronic switch device (1A) is in the off state, the switch part (Q1) of the second electronic switch device (1B) is in the on state. At this time, the first electronic switching device (1A) with the switching portion (Q1) in the off state can detect that the switching portion (Q1) of the second electronic switching device (1B) is in the on state based on the waveform of the voltage (Vsw) between the switches. . Therefore, the first electronic switching device (1A) switches the feeder circuit in accordance with the open state of the switching portion (Q1) of the second electronic switching device (1B). In other words, the electronic switching device (1) causes the feed circuit to be switched in accordance with the on / off state of the switching portion (Q1) of the other electronic switching device (1). Thereby, the electronic switching device (1) can supply power to the power supply section (43) using an appropriate feeder circuit, and the control voltage is ensured from the switch-to-switch voltage (Vsw). As a result, the electronic switching device (1) does not need a current converter in order to ensure the control voltage when the load (12) is energized, and therefore can be miniaturized.

In addition, if the configuration is such that the on / off state of the switch section (Q1) of the other electronic switching device (1) is detected based on the voltage across the capacitor (C1) of the power supply section (43), the capacitor (C1) ) The risk that the voltage on both ends of the switch unit (Q1) is incorrectly detected. With regard to such a configuration, the electronic switching device (1) of this embodiment is configured to directly detect the on / off state of the switching portion (Q1) of another electronic switching device (1) based on the voltage (Vsw) between the switches. Therefore, the detection accuracy of the on / off state of the switch section (Q1) is high. Therefore, the electronic switching device (1) can supply power to the power source section (43) using an appropriate feeder circuit in accordance with the on / off state of the switching section (Q1) of the other electronic switching device (1).

In addition, the third aspect of the electronic switching device (1) is the same as the second aspect, wherein the voltage monitoring section (32) is electrically connected to the switching section (Q1) and two or more feeder circuits (the first feeder circuit 41). The second feed circuit 42) is preferably. According to this configuration, the voltage monitoring section (32) can monitor the voltage (Vsw) between the switches before the voltage drops through the feed circuit (the first feed circuit 41 and the second feed circuit 42), so the switch section (Q1) can be improved. ) Detection accuracy of the on / off state. However, this configuration is not a necessary configuration of the electronic switching device (1). For example, the voltage monitoring section (32) can be electrically connected to two or more feeder circuits (the first feeder circuit 41 and the second feeder circuit 42) and the power supply section. (43) Between. Moreover, the electronic switching device (1) of the fourth aspect is the same as the second aspect or the third aspect, in which more than two feeder circuits include the first feeder circuit (41) and the second feeder circuit (42), and The impedance of the first feed circuit (41) is preferably lower than that of the second feed circuit (42). According to this structure, the switching circuit (Q1) can be switched to a feed circuit with a different impedance in accordance with the on / off state of the switch unit (Q1), and the control voltage can be efficiently ensured from the switch-to-switch voltage (Vsw). However, this configuration is not a necessary configuration of the electronic switching device (1), and two or more feeder circuits may include feeder circuits having the same impedance.

Moreover, the electronic switch device (1) in the fifth aspect is the same as the second aspect or the third aspect, wherein the switching control unit (52) is based on the above-mentioned inter-switch voltage (Vsw) as the reference 値 or more or less than the reference 値The length of time is also the pulse width, and the control switching section (44) is preferred. According to this configuration, the switching control unit (52) can detect the on / off state of the switching unit (Q1) according to the pulse width of the switch-to-switch voltage (Vsw), and does not require complicated calculation processing. However, this configuration is not a necessary configuration of the electronic switching device (1). For example, the switching control section (52) may control the switching section (44) based on the actual effect (average) of the voltage (Vsw) between the switches. In addition, the switching control unit (52) may control the switching unit (44) based on the peak value of the inter-switch voltage (Vsw) in each half cycle of the AC voltage (Vac).

Moreover, the electronic switching device (1) of the sixth aspect is the same as the fifth aspect, in which more than two feeder circuits include the first feeder circuit (41) and the second feeder circuit (42), and the first feeder circuit (41) Preferably, the impedance is lower than that of the second feed circuit (42). The pulse width is preferably a length of time in which the voltage Vsw between switches is equal to or more than the reference value. The switching control unit (52) controls the switching unit (44) so that the first feed circuit (41) is used as a path for supplying power when the pulse width does not reach the threshold. According to this configuration, the switch section (Q1) is on and the voltage between the switches (Vsw) is small. The first feeder circuit (41) with low impedance will be used to supply power to the power supply section (43). . Thereby, even when the load (12) is energized, the control voltage can be efficiently ensured. Furthermore, when the switch section (Q1) is in an off state and the voltage between switches (Vsw) is large, the second feeder circuit (42) having a large impedance will be used to supply power to the power supply section (43). Thereby, when the switch section (Q1) is in the off state, the leakage current flowing to the load (12) via the second feed circuit (42) can be suppressed, and the load (12) can be prevented from malfunctioning. However, this configuration is not a necessary configuration of the electronic switching device (1). For example, it may be configured to adjust the operation mode of the intermittently supplied current to the power supply section (43) in accordance with the on / off state of the switch section (Q1).

In addition, the electronic switch device (1) of the seventh aspect is like any one of the second aspect to the sixth aspect, wherein the electronic switch device (1) further includes a sensor section (31) and a switch control section ( 51) It is preferable to control the switch section (Q1) based on the output of the sensor section (31). According to this configuration, the sensor section (31) can be driven by the control voltage generated by the power supply section (43), and the switch section (Q1) can be automatically controlled by the output of the sensor section (31). However, this configuration is not a necessary configuration of the electronic switching device (1), and the sensor section (31) may be appropriately omitted.

The electronic switch system (10) in the eighth aspect includes a plurality of electronic switch devices (1) in any one of the second to seventh aspects, and a plurality of electronic switch devices (1) in the plurality of electronic switch devices (1). The switch unit (Q1) is electrically connected in parallel between the AC power source (11) and the load (12). If the switch section (Q1) of any one of the plurality of electronic switch devices (1) is in a conducting state, the other electronic devices in which the switch section (Q1) is in a non-conducting state in the plurality of electronic switch devices (1) The switching device (1) and the switching control unit (52) control the switching unit (44) so as to switch the feeder circuit used for the path for supplying power.

In other words, the electronic switching system (10) includes a plurality of electronic switching devices (1). Each of these plurality of electronic switching devices (1) includes a switching section (Q1), a power supply section (43), a switching control section (51), and two or more feeder circuits (the first feeder circuit 41 and the second feeder circuit). 42), a switching unit (44), a voltage monitoring unit (32), and a switching control unit (52). The switch section (Q1) is electrically connected between the AC power source (11) and the load (12), and switches conduction and non-conduction between the AC power source (11) and the load (12). The power supply section (43) is electrically connected between both ends of the switch section (Q1), and generates a control voltage by supplying power from an AC power supply (11). The switch control unit (51) controls the switch unit (Q1) by operating in response to a control voltage supplied from the power source unit (43). Two or more feeder circuits (the first feeder circuit 41 and the second feeder circuit 42) are electrically connected between both ends of the switch section (Q1), and become between the switch section (Q1) and the power supply section (43). Access to power. The switching unit (44) switches any one of the two or more feeder circuits (the first feeder circuit 41 and the second feeder circuit 42) used in the power supply path. The voltage monitoring unit (32) monitors the voltage across the switching unit (Q1), that is, the voltage between the switches (Vsw). The switching control unit (52) controls the switching unit (44) according to the waveform of the voltage (Vsw) between the switches. The plurality of switching units (Q1) included in the plurality of electronic switching devices (1) are electrically connected in parallel between the AC power source (11) and the load (12). When the switch part (Q1) of any one of the plurality of electronic switch devices (1) is turned on, the switch part (Q1) of the plurality of electronic switch devices (1) is turned off. In the other electronic switching devices (1) described above, the one or more switching control units (52) control one or more switching units (44) in such a manner that the feeder circuit used for the path for supplying power is switched.

According to this configuration, in each of the plurality of electronic switching devices (1), as a path for supplying power from the AC power source (11) to the power source section (43), there are two feeder circuits (the first feeder circuit 41, the second feeder circuit, and the second feeder circuit). Feeder circuit 42). The supplied power is supplied via any feeder circuit. The switching between the two feeder circuits (the first feeder circuit 41 and the second feeder circuit 42) is performed according to the voltage (Vsw) between the switches. In the electronic switching device (1), the voltage between the switches (Vsw) can be monitored by the voltage monitoring section (32), and the on / off state of the switching section (Q1) of other electronic switching devices (1) can be detected. For example, the switch part (Q1) of the first electronic switch device (1A) is set to the off state, and the switch part (Q1) of the second electronic switch device (1B) is set to the on state. At this time, the first electronic switching device (1A) in which the switching portion (Q1) is off can detect that the switching portion (Q1) of the second electronic switching device (1B) is on according to the waveform of the voltage (Vsw) between the switches. status. Therefore, the first electronic switching device (1A) switches the feeder circuit in accordance with the open state of the switching portion (Q1) of the second electronic switching device (1B). That is, the electronic switching device (1) switches the feeder circuit in accordance with the on / off state of the switching section (Q1) of the other electronic switching device (1). Thereby, the electronic switching device (1) can supply power to the power supply section (43) using an appropriate feeder circuit, and the control voltage is ensured from the switch-to-switch voltage (Vsw). As a result, when the electronic switching device (1) and the load (12) are energized, a current converter is not required to secure the control voltage, and thus it can be miniaturized. In particular, in an electronic switching system (10) combining two electronic switching devices (1) composed of three-way switches, the first electronic switching device (1A) and the switching portion (Q1) in which the switching portion (Q1) is in an off state. ) The second electronic switching device (1B) in the on state can ensure the control voltage. (4) Modifications

The electronic switching device 1 according to the first embodiment is only an example of the present invention, and the present invention is not limited to the first embodiment. Even if it is other than the first embodiment, as long as it does not exceed the scope of the technical idea of the present invention, it can be performed according to the design and the like Various changes. The following is a modification of the first embodiment.

The load 12 is not limited to a lighting device, and may be an electric appliance such as a ventilation fan and a monitor. In addition, the load 12 is not limited to one appliance, and may be a plurality of appliances electrically connected in series or in parallel.

The switching unit Q1 is not limited to a two-way brake fluid, and may be another semiconductor switch. The switching unit Q1 may be, for example, two MOSFETs electrically connected in series between the first connection terminal 101 and the third connection terminal 103. The two MOSFETs are connected to each other through the source terminals, which is the so-called inverse series connection, and switches between current passing and blocking in both directions. Furthermore, the switching unit Q1 may be a semiconductor element having a dual gate structure using a semiconductor material with a wide energy gap such as GaN (gallium nitride).

The number of feeder circuits (the first feeder circuit 41 and the second feeder circuit 42) serving as a path for supplying power to the power supply unit 43 is not limited to two, and may be three or more.

The driving circuit for driving the switching unit Q1 may be provided separately from the control unit 5. At this time, the control voltage can also be used for the operation of the driving circuit.

The sensor unit 31 is not limited to a human sensor that detects the presence of a person, and may be, for example, a bright sensor. Alternatively, the sensor section 31 may include both a human sensor and a brightness sensor. Moreover, the electronic switch device 1 is not limited to the configuration that controls the switch section Q1 according to the detection result of the sensor section 31, and may be, for example, an electronic switch device with a remote operation function, a timing function, or a dimming function. For example, if the electronic switch device 1 is equipped with a remote operation function, the control unit 5 controls the switch unit Q1 according to a wireless signal from a remote controller. Furthermore, the electronic switch device 1 may be configured to control the switch unit Q1 according to a person's operation on an operation unit such as a push button switch or a touch switch.

In addition, the voltage monitoring unit 32 may be configured not to monitor the inter-switch voltage Vsw after full-wave rectification, but to monitor the magnitude of the inter-switch voltage Vsw before full-wave rectification. At this time, the voltage monitoring unit 32 is electrically connected between the AC input terminals of the rectifier 2. The voltage monitoring section 32 functions as a zero-cross detection section for detecting a zero-cross point and a state detection section for detecting the on / off state of the switch section Q1 of the other electronic switching device 1, but the zero-cross detection section Can be set separately from the status detection section. The state detection unit may be configured to compare only the magnitude of the inter-switch voltage Vsw with a reference 値 of positive polarity, or may be configured to compare only the magnitude of the inter-switch voltage Vsw to a reference 値 of negative polarity.

The switch control unit 51 may be configured to turn on the switch unit Q1 at a point in time after a predetermined time has elapsed after the magnitude of the inter-switch voltage Vsw is equal to or greater than the reference value 値. After the magnitude of the inter-switching voltage Vsw becomes equal to or greater than the reference value, the switching unit Q1 is kept in a non-conductive state for a predetermined period of time. Therefore, even if the reference signal undulates between the plurality of electronic switching devices 1, when the switching portion Q1 of the other electronic switching device 1 is turned on, the inter-switch voltage Vsw of the electronic switching device 1 can be suppressed. Up to the benchmark level. Therefore, it is possible to improve the detection accuracy of the on / off state of the switch portion Q1 of the other electronic switching device 1.

Furthermore, the switch control unit 51 may be configured to output a switch control signal to the switch unit Q1 based on the voltage across the capacitor C1 of the power supply unit 43. The switching control unit 51 turns on the switching unit Q1 when the voltage across the capacitor C1 becomes equal to or higher than the threshold voltage. This threshold voltage is the voltage across the capacitor C1 when the capacitor C1 is charged, and the voltage must be such that the control unit 5 and the sensor unit 31 can be operated during the period before the switching unit Q1 becomes non-conducting.

The switching control unit 52 is configured to control the switching so that the first feeder circuit 41 is used as a path for supplying power to the power source unit 43 when the continuous voltage Vsw does not reach the continuous time of the reference value or more for a predetermined period of time.部 44. 44. When the reference value fluctuates between the plurality of electronic switching devices 1, although the switching portion Q1 of the other electronic switching devices 1 is on, the inter-switching voltage Vsw of the electronic switching device 1 may still not reach the reference value. Even in this case, it can be detected that the switch portion Q1 of the other electronic switching device 1 is on, and the first feeder circuit 41 having a low impedance can be used as a path for supplying power to the power source portion 43.

Furthermore, the switching control unit 52 is configured to control the switching unit 44 in accordance with the inter-switch voltage Vsw even when the switching unit Q1 is controlled to be in the off state, even when the switching unit Q1 is controlled to be in the off state.

When the pulse width of the inter-switching voltage Vsw does not reach the threshold value, the configuration in which only the first feed circuit 41 is used for the power supply path of the power supply section 43 is not unique. For example, the switching control unit 52 may be configured to alternately switch the first feed circuit 41 and the second feed circuit 42 at predetermined intervals when the pulse width of the inter-switch voltage Vsw does not reach the threshold value. Thereby, when the switching unit Q1 is switched from the on state to the off state, current can be prevented from continuously flowing to the load 12 through the first feed circuit 41, and the detection of the on / off state of the switching unit Q1 of other electronic switching devices 1 can be improved. Measurement accuracy.

When a load switch is used as the low-impedance element of the first feed circuit 41, the load switch and the switching unit 44 can be used simultaneously. When the load switch is turned on, the two ends of the second feed circuit 42 are short-circuited in the first feed circuit 41, and power is supplied to the power supply unit 43 through the first feed circuit 41. Further, by turning off the load switch, power is supplied to the power supply section 43 via the second feed circuit 42.

The specific circuit of the power supply section 43 is not limited to the circuit shown in FIG. 1, and can be appropriately changed. For the power supply section 43, for example, the capacitor C1 may be connected to the output of the regulator 45, and a capacitor other than the capacitor C1 may be connected to the output of the regulator 45. Furthermore, the regulator 45 of the power supply section 43 is not a necessary configuration of the electronic switching device 1, and the regulator 45 may be omitted.

In the first embodiment, in comparison between two voltages, such as the voltage between switches and the reference voltage, "above" includes both the case where two voltages are equal and the case where one of the two voltages exceeds the other. Happening. However, it is not limited to this, and "above" here may be equivalent to a case where only one of the two puppets exceeds the other, that is, "larger". In other words, whether the two cases are equal or not can be arbitrarily changed according to the setting of the base case, so there is no technical difference between "above" and "large". Similarly, "not reached" can be equated with "below". (Embodiment 2)

The electronic switching system 10A of the second embodiment is composed of a combination of three electronic switching devices 1A, 1B, and 1C, as shown in FIG. 5. In the following, the same configuration as in the first embodiment is assigned the same reference numerals, and appropriate descriptions are omitted.

The electronic switching devices 1A and 1B are so-called three-way switches similar to the first embodiment. The electronic switching device 1C is a so-called four-way switch capable of connecting four wires. The electronic switch device 1C includes a fourth connection terminal 104 in addition to the three connection terminals 101, 102, and 103 similar to the electronic switch devices 1A and 1B.

In the electronic switching device 1C, the connection terminal 103 and the connection terminal 104 are connected inside the electronic switching device 1C. The connection terminal 102 of the electronic switching device 1A is connected to the connection terminal 101 of the electronic switching device 1C. The connection terminal 103 of the electronic switching device 1A is connected to the connection terminal 104 of the electronic switching device 1C. The connection terminal 102 of the electronic switching device 1B is connected to the connection terminal 103 of the electronic switching device 1C. The connection terminal 103 of the electronic switching device 1B is connected to the connection terminal 102 of the electronic switching device 1C.

According to the above connection relationship, the plurality of switching units Q1 provided in the plurality (three here) of the electronic switching devices 1A, 1B, and 1C are electrically connected in parallel between the AC power source 11 and the load 12. Therefore, when the switch portion Q1 of any of the three electronic switching devices 1A, 1B, and 1C is turned on, the AC power source 11 and the load 12 are turned on. Power is supplied to the load 12. Therefore, in the electronic switching system 10A, the switching portion Q1 of the electronic switching device 1A, the switching portion Q1 of the electronic switching device 1B, and the switching portion Q1 of the electronic switching device 1C can switch the energized state toward the load 12. Therefore, in the electronic switching system 10A in which three electronic switching devices 1A, 1B, and 1C are combined, the energized state toward the load 12 can be switched at three places.

Even in the electronic switch system 10A of the present embodiment described above, similarly to the first embodiment, there is no need for a current converter in order to ensure the control voltage when the load 12 is energized. Therefore, there is an advantage that the electronic switch device 1 can be miniaturized.

As a modification of the second embodiment, the electronic switching system 10A may include two or more electronic switching devices 1C (so-called four-way switches), and a total of four or more electronic switching devices 1A, 1B, and 1C. At this time, the plurality of switch units Q1 provided in the plurality of electronic switching devices 1A, 1B, and 1C are electrically connected in parallel between the AC power source 11 and the load 12, thereby switching the power-on state to the load 12 at four or more locations. .

The configuration (including modifications) of the second embodiment can be used in appropriate combination with the configuration (including modifications) of the first embodiment. (Embodiment 3) (1) Details

Hereinafter, the configurations of the electronic switch device 1 and the electronic switch system 10 according to this embodiment will be described with reference to FIGS. 2 and 6.

As shown in FIG. 2, the electronic switching device 1 includes a rectifier 2 and a circuit section 3 in addition to the switch section Q1 and the three connection terminals 101, 102, and 103. The circuit section 3 includes an auxiliary switch section Q2, a voltage monitoring section 32, a power generation block 4, a control section 5, a determination section 53, and a sensor section 31. These switch sections Q1, three connection terminals 101, 102, and 103, the rectifier 2 and the circuit section 3 are housed in a single housing. The electronic switch device 1 is fixed to a wall or the like by a frame, and is mounted on the wall or the like.

Each of the three connection terminals 101, 102, and 103 is a component to which the wiring is electrically or mechanically connected. As described above, the connection terminal 101 and the connection terminal 103 are connected, and the switch unit Q1 is connected. The connection terminal 102 is an extension terminal of the connection terminal 101 and is electrically connected to the connection terminal 101. The “terminals” such as “connection terminals” in this embodiment may not be parts (terminals) for connecting power lines, and may be, for example, wires of electronic components or a part of a conductor included in a circuit board.

The switching unit Q1 is electrically connected between the AC power source 11 and the load 12, and switches between conduction and non-conduction between the AC power source 11 and the load 12. In this embodiment, the switch unit Q1 is composed of a three-terminal bidirectional brake fluid (triode flow switch). The switch unit Q1 is electrically connected between the connection terminal 101 and the connection terminal 103, and switches the passage and interruption of current in both directions between the connection terminal 101 and the connection terminal 103. The control terminal (gate terminal of the bidirectional brake fluid) of the switch section Q1 is electrically connected to the AC input terminal of the rectifier 2. The control terminal of the switch unit Q1 is electrically connected to the connection terminal 103 via a resistor R0. In FIG. 2, the switch unit Q1 and the mechanical switch having a contact point are marked with the same circuit symbol.

The auxiliary switching unit Q2 is electrically connected between the rectifier 2 and the power generation block 4, and switches between conduction and non-conduction between the DC output terminals of the rectifier 2. In this embodiment, the auxiliary switching section Q2 is composed of an enhanced n-channel MOSFET (Metal-Oxide-Semiconductor Field Effect Transistor). The drain terminal of the auxiliary switching unit Q2 is electrically connected to a DC output terminal on the high potential side of the rectifier 2. The source terminal of the auxiliary switching unit Q2 is electrically connected to a DC output terminal (ground) of the low potential side of the rectifier 2. The auxiliary switch unit Q2 is controlled by inputting a control signal (first control signal) CS1 from the control unit 5 to the gate terminal as described later.

Here, if the auxiliary switching unit Q2 is non-conducting, a considerable amount of control voltage (gate voltage) is not applied to the control terminal of the switching unit Q1, and the switching unit Q1 becomes non-conducting. In addition, if the auxiliary switching section Q2 is turned on, a current flows to the resistor R0 through the auxiliary switching section Q2 and the rectifier 2, thereby applying a control voltage of a considerable magnitude to the control terminal of the switching section Q1 to make the switching section Q1 conductive.

The rectifier 2 is composed of a diode bridge. The rectifier 2 is a full-wave rectified voltage (hereinafter also referred to as "inter-switch voltage Vsw") applied to both ends of the switching section Q1, and then outputs it to the power generation block 4. Therefore, the power generation block 4 is connected between the DC output terminals of the rectifier 2. The power generation block 4 uses the full-wave rectified power input from the rectifier 2 to generate a “control voltage” required for driving the control section 5 and the sensor section 31, for example.

Hereinafter, it is assumed that the switching unit Q1 is in a non-conducting state, and an AC voltage Vac is applied from the AC power source 11 to the switching unit Q1. In other words, when the switching section Q1 is non-conductive, the inter-switch voltage Vsw becomes substantially the same as the AC voltage Vac from the AC power source 11. In addition, the polarity of the AC voltage Vac and the inter-switch voltage Vsw at which the connection terminal 101 becomes a high potential is hereinafter referred to as "positive polarity", and the polarity of the AC voltage Vac and the inter-switch voltage Vsw at which the connection terminal 101 is a high potential is referred to as "a negative Sex. "

The voltage monitoring unit 32 is configured to monitor (detect) the magnitude of the voltage Vsw between the switches. In this embodiment, the voltage monitoring unit 32 is configured to detect a zero crossing of the voltage Vsw between the switches. The voltage monitoring unit 32 is configured to output a detection signal to the control unit 5. The electronic switching device 1 according to this embodiment includes a detection section (first detection section) 321 and a detection section (second detection section) 322 as the voltage monitoring section 32. Also, in this embodiment, there are also two detection signals (a detection signal (the first detection signal) S11 and a detection signal (the second detection signal) S12).

The detection section 321 is electrically connected to the connection terminal 101. The detection unit 321 detects the voltage between the switches Vsw from the negative polarity by comparing the magnitude of the voltage between the connection terminal 101 and the ground (reference potential point) with the reference 値 Vth10 (refer to Figure 7. For example, 12 [V]). Zero crossing when switching to positive polarity. The detection unit 321 outputs a detection signal S11 indicating a monitoring result (detection result) to the control unit 5. The signal level of the detection signal S11 is the high level when the voltage between the connection terminal 101 and the ground does not reach the reference (Vth10), and the voltage between the connection terminal 101 and the ground is the reference (Vth10 or higher). Becomes L level (Low level).

The detection unit 322 is electrically connected to the connection terminal 103. The detection unit 322 detects a zero-crossing when the voltage Vsw of the switch is switched from the positive polarity to the negative polarity by comparing the magnitude of the voltage between the connection terminal 103 and the ground with the reference 値 Vth10. The detection unit 322 outputs a detection signal S12 indicating a monitoring result (detection result) to the control unit 5. The signal level of the detection signal S12 becomes the H level when the voltage between the connection terminal 102 and the ground does not reach the reference 値 Vth10, and the voltage between the connection terminal 102 and the ground is the reference; when the voltage is above Vth10, it becomes L Level.

In other words, if the detection unit 321 detects that the magnitude of the positive-to-switch voltage Vsw has never reached the reference state, Vth10, and moves to a state above the reference state, Vth10, it will be judged as a zero-crossing, and the detection signal will be detected. The signal level of S11 is set to the L level. Similarly, if the detection unit 322 detects that the magnitude of the negative inter-switching voltage Vsw has never reached the reference 値 Vth10 state and moved to a reference 値 Vth10 state or higher, it will judge that it is a zero-crossing, and will detect the signal S12. The signal level is set to the L level. Therefore, the detection points of the zero crossing detected by the detecting section 321 and the detecting section 322 are slightly delayed in time compared with the zero crossing (0 [V]) in the strict sense.

The power generation block 4 includes a power feeding circuit 430, a power supply section 43, a power input terminal 401, and a power output terminal 402. The power supply section 43 is electrically connected to the switch section Q1. The power supply unit 43 is configured to generate a control voltage of the control unit 5 by supplying power from the AC power supply 11. The power feeding circuit 430 is electrically connected between the switching section Q1 and the power supply section 43.

Both the power feeding circuit 430 and the power supply section 43 are electrically connected between the DC output terminals of the rectifier 2. The power input terminal 401 is an input terminal corresponding to the feeding circuit 430 and is electrically connected to a DC output terminal on the high potential side of the rectifier 2. Therefore, when the switching section Q1 and the auxiliary switching section Q2 are in a non-conducting state, a full-wave rectified inter-switch voltage Vsw is applied between the power input terminal 401 and the ground (the low-voltage side DC output terminal of the rectifier 2) , That is, the pulse voltage output from the rectifier 2. The power output terminal 402 is an output terminal corresponding to the power supply section 43 and is electrically connected to the control section 5. As a result, when the control section generates a control voltage, the power supplied to the power section 43 must be supplied to the power section 43 via the power feeding circuit 430. The power feeding circuit 430 is, for example, a step-down circuit that steps down an input voltage (inter-switch voltage Vsw) and outputs it to the power supply unit 43.

The feeder circuit 430 includes a Zener diode (first Zener diode) ZD1, an active element Q10, a resistor (first resistor) R1, a resistor (second resistor) R2, a diode D1, and a current limiting portion. 46. The current limiting unit 46 includes a switching element (first switching element) Q11, a resistor (third resistor) R3, and a resistor (fourth resistor) R4. The feed circuit 430 further includes a Zener diode (second Zener diode) ZD2, a switching element (second switching element) Q12, a switching element (third switching element) Q13, and a resistor (fifth resistor ) R5 and resistor (sixth resistor) R6. The power supply section 43 includes a capacitor C1 and a regulator 45.

Between the power input terminal 401 and the ground, the active element Q10, the resistor R3, the diode D1, and the capacitor C1 are electrically connected in series. Thereby, the series circuit of the active element Q10, the resistor R3, and the diode D1 constitutes a part of a path for supplying power to the power source section 43, that is, a part of the charging path 47 of the capacitor C1. The active element Q10 is a voltage-driven active element that is provided on the charging path 47 of the capacitor C1 between the two ends of the switching section Q1 and is turned on when the magnitude of the inter-switch voltage Vsw is greater than or equal to a predetermined value. The active element Q10 is composed of an enhanced n-channel MOSFET as an example.

The drain terminal of the active element Q10 is electrically connected to the power input terminal 401. The source terminal of the active element Q10 is electrically connected to the anode terminal of the diode D1. The cathode terminal of the diode D1 is electrically connected to the ground electrode through the capacitor C1. The resistor R1 and the Zener diode ZD1 are electrically connected in series between the power input terminal 401 and the ground. The anode terminal of the Zener diode ZD1 is electrically connected to the ground. The gate terminal (control terminal) of the active element Q10 is electrically connected to the cathode terminal of the Zener diode ZD1 via a resistor R2.

Between the anode terminal and the ground of the diode D1, the Zener diode ZD2, the switching element Q12, and the resistor R5 are electrically connected in series. The cathode terminal of the Zener diode ZD2 is electrically connected to the anode terminal of the diode D1. The switching element Q12 is, for example, an enhanced n-channel MOSFET. The drain terminal of the switching element Q12 is electrically connected to the anode terminal of the Zener diode ZD2. The source terminal of the switching element Q12 is electrically connected to the resistor R5. The switching element Q12 is controlled by inputting a control signal (second control signal) CS2 from the control unit 5 to the gate terminal as described later.

The switching element Q13 is composed of an npn-type bipolar transistor as an example. The base terminal of the switching element Q13 is electrically connected to the source terminal of the switching element Q12 and the connection point of the resistor R5. The transmitting terminal of the switching element Q13 is electrically connected to the ground. The collector terminal of the switching element Q13 is electrically connected to the output terminal of the regulator 45 through the resistor R6, that is, the power output terminal 402. The collector terminal system of the switching element Q13 is electrically connected to the control unit 5. Therefore, when the charging detection signal S3 is input to the control unit 5, when the switching element Q13 is non-conductive, the signal level becomes the H level, and when the switching element Q13 is conductive, the signal level becomes the L level.

The regulator 45 is a three-terminal regulator (series regulator). The input terminal of the regulator 45 is electrically connected to the terminal on the high potential side of the capacitor C1, that is, the cathode terminal of the diode D1. The output terminal of the regulator 45 is electrically connected to the power output terminal 402.

According to the above configuration, the feeding circuit 430 receives the power supply from the AC power source 11 and charges the capacitor C1 at a constant voltage based on the Zener voltage (dropped voltage) of the Zener diode ZD1. In other words, if the voltage Vsw between the switches, that is, the voltage applied between the power input terminal 401 and the ground electrode is greater than or equal to the predetermined voltage (hereinafter also referred to as the "minimum charging voltage"), the active element Q10 will be turned on to supply power. It is supplied to the power supply section 43. In other words, the power feeding circuit 430 is configured to supply power to the power supply section 43 when the magnitude of the inter-switch voltage Vsw is equal to or greater than a predetermined threshold. Therefore, when the voltage Vsw between the switches is equal to or higher than the minimum charging voltage, the capacitor C1 is charged at a constant voltage. The voltage across the capacitor C1 is stepped down by the regulator 45 and then output from the power output terminal 402. In this way, the power supply unit 43 outputs a control voltage of a constant voltage from the power output terminal 402.

That is, if the inter-switch voltage Vsw is equal to or higher than the minimum charging voltage, the active element Q10 of the power feeding circuit 430 will be turned on, so the input impedance of the power feeding circuit 430 will become a low impedance state. Therefore, the supplied power is supplied to the power supply section 43, and a control voltage is generated in the power supply section 43. When the capacitor C1 is in a fully charged state, current does not flow from the power feeding circuit 430 to the power supply section 43, and thus the input impedance of the power feeding circuit 430 becomes a high impedance state.

Next, the current limiting unit 46 will be described. In the current limiting portion 46, the resistor R3 is a shunt resistor that is electrically connected to the source terminal of the active element Q10 and functions as a detection resistor that detects the current flowing to the active element Q10. Here, the resistor R3 is electrically connected between the source terminal of the active element Q10 of the feeding circuit 430 and the anode terminal of the diode D1. The switching element Q11 is electrically connected between the source terminal and the control terminal (gate terminal) of the active element Q10. The switching element Q11 is composed of an npn-type bipolar transistor as an example. The transmitting terminal of the switching element Q11 is electrically connected to the source terminal of the active element Q10 via a resistor R3. The collector terminal of the switching element Q11 is electrically connected to the gate terminal of the active element Q10. The base terminal of the switching element Q11 is electrically connected to the source terminal of the active element Q10 via a resistor R4.

According to the above configuration, when the current (drain current) flowing through the active element Q10 becomes a predetermined value or more, the switching element Q11 is turned on by the voltage across the resistor R3, thereby turning off the active element Q10. . As a result, the charging path 47 of the capacitor C1 is blocked, and the generation of the control voltage in the power supply section 43 is stopped. In other words, if a current of a predetermined magnitude or more flows from the AC power supply 11 to the power supply section 43, the capacitor C1 is electrically cut off from the power input terminal 401 by the current limiting section 46, and the supply of power to the power supply section 43 is stopped.

The control unit 5 includes, for example, a microcomputer as a main configuration. The microcomputer executes a program stored in the memory of the microcomputer on a CPU (Central Processing Unit) to realize the function of the control unit 5. The program can be stored in the microcomputer's memory in advance, it can also be provided in a storage medium such as a memory card, or it can be provided through an electrical communication circuit. In other words, the above program is a program for causing the microcomputer to function as the control unit 5.

The control unit 5 is operated by receiving a control voltage from the power generation block 4. The control unit 5 has a function of indirectly controlling the switching unit Q1 by controlling the auxiliary switching unit Q2. That is, the control unit 5 is configured to control the switching unit Q1. Specifically, the control unit 5 outputs a control signal CS1 to the control terminal (gate terminal) of the auxiliary switch unit Q2 according to the detection result of the sensor unit 31, thereby switching the conduction and non-conduction of the auxiliary switch unit Q2. The auxiliary switching unit Q2 is controlled. When the conduction and non-conduction of the auxiliary switch section Q2 are switched, the conduction and non-conduction of the switch section Q1 are switched as described above. In addition, the control unit 5 decides to control the signal CS1 based on the detection signals (detection signals S11 and S12) output from the voltage monitoring unit 32 when the auxiliary switch unit Q2 is turned on, that is, when the switch unit Q1 is turned on. When the signal level of H is set to the H level. The control section 5 includes a drive circuit for driving the auxiliary switch section Q2, and the control section 5 directly controls the auxiliary switch section Q2.

The control unit 5 outputs a control signal CS2 to a control terminal (gate terminal) of the switching element Q12 to switch the conduction and non-conduction of the switching element Q12 to control the switching element Q12. In this embodiment, when the control unit 5 switches the auxiliary switching unit Q2 from a conducting state to a non-conducting state, the switching element Q12 is turned on by switching the signal level of the control signal CS2 from the L level to the H level. . When the switching element Q12 is in the on state, if the sum of the charging voltage of the capacitor C1 and the forward voltage of the diode D1 exceeds the Zener voltage of the Zener diode ZD2, a current will flow to the base terminal of the switching element Q13. In this way, the switching element Q13 will be turned on, and the signal level of the charge detection signal S3 will change from the H level to the L level. In addition, when the switching element Q12 is on, the sum of the charging voltage of the capacitor C1 and the forward voltage of the diode D1 is equal to or lower than the Zener voltage of the Zener diode ZD2, so that current does not flow to the switching element Q13. Base terminal. Therefore, since the switching element Q13 remains non-conductive, the signal level of the charge detection signal S3 is maintained at the H level.

That is, in the conducting state of the switching element Q12, if the capacitor C1 is fully charged and the control voltage can be ensured, the signal level of the charge detection signal S3 will become the L level. In addition, in the conducting state of the switching element Q12, if the capacitor C1 is not fully charged to ensure the control voltage, the signal level of the charge detection signal S3 will be maintained at the H level. Therefore, the control unit 5 can determine whether the control voltage can be ensured by monitoring the charge detection signal S3.

In this embodiment, the control unit 5 executes the control of the auxiliary switch unit Q2 when the voltage monitoring unit 32 detects a zero crossing of the voltage Vsw between the switches and determines that the control voltage can be ensured by the charge detection signal S3. In other words, when the voltage monitoring unit 32 detects a zero crossing of the inter-switch voltage Vsw, the capacitor C1 is not fully charged, and the capacitor C1 is fully charged before the control of the auxiliary switching unit Q2 is performed. .

The determination unit 53 is configured to determine an operation state of the other switching unit Q14 based on a monitoring result by the voltage monitoring unit 32. Here, the “other switching unit Q14” is a switching unit Q1 of another electronic switching device 1 which is electrically connected between the AC power source 11 and the load 12. For example, the determination unit 53 of the electronic switching device 1A is configured to determine the operating state (conducting / non-conducting) of the switching portion Q1 (the other switching portion Q14) of the other electronic switching device 1B. In this embodiment, when the voltage monitoring unit 32 detects a zero crossing of the voltage Vsw between the switches, the determination unit 53 determines the other switching unit Q14 based on the pulse width W1 (refer to FIG. 7) appearing in the detection signal S10. State of action. Here, the "pulse width" is a length of time during which the magnitude of the voltage Vsw (Vsw) between the switches is the reference 値 Vth10 or more. Moreover, in FIG. 7, the detection signal S10 is a signal that makes the detection signal S11 coincide with the detection signal S12.

When the determination unit 53 compares the pulse width W1 with the threshold value and finds that the pulse width W1 does not reach the threshold value, it determines that the other switching portion Q14 is in the on state. When the determination unit 53 finds that the pulse width W1 is equal to or larger than the threshold value, it determines that the other switching units Q14 are in a non-conducting state. The threshold value is set to, for example, about 1/8 of one cycle of the AC voltage Vac. In the present embodiment, the determination unit 53 is one of the functions of the control unit 5, but may be configured by hardware (or software) other than the control unit 5.

The sensor section 31 detects whether there is a person in the detection area. The sensor unit 31 includes, for example, a pyroelectric element and detects infrared rays emitted from a human body, thereby determining whether there is a person in the detection area. When the sensor section 31 detects a person in the detection area, it outputs an open control instruction for setting the switch section Q1 to the on state to the control section 5.

When the control section 5 receives the open control instruction from the sensor section 31, the signal level of the control signal CS1 given to the auxiliary switch section Q2 is set to the H level based on the detection signal from the voltage monitoring section 32. Specifically, the control unit 5 turns on the auxiliary switching unit Q2 when the voltage Vsw between the switches is zero crossing based on a detection signal from the voltage monitoring unit 32. As a result, the switching unit Q1 is turned on. In other words, the control unit 5 is configured to set the operating state of the switching unit Q1 to the on state when it receives an open control instruction for setting the operating state of the switching unit Q1 to the on state.

Here, the switching unit Q1 is constituted by the bidirectional sluice fluid as described above, and becomes non-conductive near the AC voltage Vac from the AC power source 11 when the zero crossing (0 [V]) is near. Strictly speaking, after the switching part Q1 is turned on, if the current flowing through the switching part Q1 becomes 0 [A], the switching part Q1 becomes non-conducting. Therefore, depending on the type of the load 12, it may be more than the zero crossing of the AC voltage Vac. At an earlier point, the switching section Q1 becomes non-conductive.

In other words, the control unit 5 turns on the auxiliary switching unit Q2 every time the voltage monitoring unit 32 detects that the inter-switch voltage Vsw is zero-crossing, that is, every time the AC voltage Vac passes for a half period, the switch The part Q1 is turned on. In this embodiment, the control unit 5 executes the processes of detecting the voltage Vsw between the switches at the detection unit 321 as zero crossing and controlling the auxiliary switching unit Q2, and detecting that the voltage Vsw between the switches is zero crossing at the detection unit 322. Controls the processing of the auxiliary switch unit Q2. When the switch unit Q1 is turned off, the control unit 5 controls the auxiliary switch unit Q2 so that the auxiliary switch unit Q2 becomes non-conductive, thereby maintaining the switch unit Q1 non-conductive. (2) Act

Then, the operations of the electronic switch device 1 and the electronic switch system 10 will be described with reference to FIGS. 7 and 8. FIG. 7 illustrates an operation when the switch portions Q1 of both the electronic switching devices 1A and 1B are in the off state. FIG. 8 illustrates operations performed when the switch section Q1 of the electronic switch device 1A is in the off state and the switch section Q1 of the electronic switch device 1B is in the on state. In the examples of FIGS. 7 and 8, the electronic switching device 1B is referred to as “other electronic switching device 1B”, and the operation of the electronic switching device 1A will be described. Therefore, in the examples of FIGS. 7 and 8, the switch section Q1 of the electronic switching device 1B is another switch section Q14.

Figures 7 and 8 show the AC voltage "Vac" of the AC power source 11, the voltage "Vsw" between the switches of the switching unit Q1 of the electronic switching device 1A, and the detection signal "S10" "And other operating states (conducting / non-conducting) of the switch unit Q14. In the examples in Figures 7 and 8, the signal level of the detection signal "S10" is the level when the voltage Vsw between the switches is the reference level and the L level when Vth10 or higher, and the value of the voltage Vsw between the switches does not reach the standard.値 Vth10 is H level. 7 and 8 show the inter-switch voltage Vsw of the electronic switching device 1A, but this inter-switch voltage Vsw is substantially the same as the inter-switch voltage Vsw of the other electronic switching device 1B. In addition, for "Q14" indicating the operating state of the other switching unit Q14, "ON" indicates conduction and "OFF" indicates non-conduction.

First, the operation when the switch portions Q1 of both the electronic switching devices 1A and 1B are in the off state will be described using FIG. 7. In the example of FIG. 7, since the switching portions Q1 of both the electronic switching devices 1A and 1B are in the off state, the inter-switch voltage Vsw is the same voltage as the AC voltage Vac.

In the example in FIG. 7, the inter-switching voltage Vsw is switched from the negative polarity to the positive polarity at time point t20, and at the time point t23 after the time point t20, it is switched from the positive polarity to the negative polarity. In the example in FIG. 7, from the time point t21 after the time point t20 to the time point t22 before the time point t23, the magnitude of the switch-to-switch voltage Vsw becomes the reference 値 Vth10 or more, and the signal level of the detection signal S10 becomes L Level. Similarly, in the example of FIG. 7, from the time point t24 to the time point t25 after the time point t23, the signal level of the detection signal S10 becomes the L level.

Here, the pulse width W1 of the detection signal S10 (the length of time from the time point t21 to the time point t22 and the length of time from the time point t24 to the time point t25) is a length corresponding to a half cycle of the AC voltage Vac, It is also above threshold threshold. Therefore, in the example shown in FIG. 7, within one cycle of the AC voltage Vac, the pulse width W1 is continuously increased to the threshold value or more several times, and the determination unit 53 of the electronic switching device 1A determines that the other switching units Q14 are in the off state.

Next, the operation when the switch unit Q1 of the electronic switch device 1A is in the off state and the switch unit Q1 of the electronic switch device 1B is in the on state will be described using FIG. 8. In the example in FIG. 8, the inter-switching voltage Vsw is switched from the negative polarity to the positive polarity at time point t26, and is switched from the positive polarity to the negative polarity at time point t29 after the time point t26. In the example of FIG. 8, at a time point t27 after the time point t26, the magnitude of the inter-switch voltage Vsw becomes equal to or greater than the reference 値 Vth10, and the signal level of the detection signal S10 is changed from the H level to the L level. Then, at a time point t28 after the time point t27, the other switch sections Q14 are turned on, so that the inter-switch voltage Vsw becomes approximately 0 [V]. Therefore, the signal level of the detection signal S10 is changed from the L level to the H level at time t28. Similarly, in the example in FIG. 8, at the time point t30 after the time point t29, the signal level of the detection signal S10 is changed from the H level to the L level, and at the time point t31 after the time point t30, the signal level of the signal S10 is detected. The criterion changes from the L level to the H level.

Here, the pulse width W1 (length of time from time point t27 to time point t28 and time length from time point t30 to time point t31) of the detection signal S10 does not reach the threshold value. Therefore, in the example of FIG. 8, in one cycle of the AC voltage Vac, the pulse width W1 does not reach the threshold multiple times in succession. Therefore, the determination unit 53 of the electronic switching device 1A determines that the other switching units Q14 are in the on state. (3) advantages

Hereinafter, when the advantages of the electronic switching device 1 according to this embodiment are described, first, the electronic switching device of the comparative example will be described. The electronic switching device of the comparative example is different from the electronic switching device 1 of the present embodiment in that it does not include a determination unit. In addition, a system including an electronic switch device of a comparative example and another electronic switch device will be described below as an electronic switch system of a comparative example.

For example, it is assumed that the switch portion of the electronic switch device of the comparative example is in the off state, and the switch portions (other switch portions) of other electronic switch devices are in the on state. Then, assuming that in this state, the control section of the electronic switching device of the comparative example has received an open control instruction from the sensor section. At this time, since the other switch parts are in the on state, power has been supplied from the AC power source to the load. Therefore, in this state, it is not necessary to turn on the switch portion of the electronic switching device.

However, since the electronic switching device of the comparative example does not include a determination unit, it is impossible to consider the operating states of other switching units when controlling the switching unit. Therefore, the control section of the electronic switching device of the comparative example turns on the switching section even when the other switching sections are in the on state. Then, if the switching portion of the electronic switching device of the comparative example and the switching portion of other electronic switching devices are turned on at the same time, the current flowing through the load may flow to each switching portion, and the switching portions may not be maintained in the conductive state. At this time, for example, if the load is a lighting device, the brightness of the load will change, which may cause discomfort to the person viewing the load. In addition, control by the control unit of the electronic switch of the comparative example and the control unit of other electronic switch devices may be disturbed. In other words, the control of the electronic switching device of the comparative example may compete with the control of other electronic switching devices.

In addition, in the electronic switching device 1 of this embodiment, the voltage across the switching section Q1, that is, the magnitude of the inter-switch voltage Vsw, is monitored by the voltage monitoring section 32. Then, in the electronic switching device 1 of the present embodiment, the operating state of the switching portion Q1 (other switching portion Q14) of the other electronic switching device 1 is determined by the determination unit 53 based on the monitoring result of the voltage monitoring unit 32. Therefore, in the electronic switching device 1 of this embodiment, the control unit 5 can control the switching unit Q1 in consideration of the operating state of the other switching unit Q14.

For example, when the control unit 5 of the electronic switch device 1 of this embodiment receives the ON control instruction from the sensor unit 31 when the other switch unit Q14 is in the on state, it can wait for the other switch unit Q14 to turn off before turning the switch on. The part Q1 is turned on. In other words, the control unit 5 may be configured to delay the process of setting the operating state of the switching unit Q1 to the on state when the determining unit 53 determines that the operating state of the other switching unit Q14 is the on state when receiving the open control instruction. Of course, if the control unit 5 does not compete with the control of the other electronic switching device 1 when the determining unit 53 determines that the operating state of the other switching unit Q14 is on, it may switch the switching unit Q1 without waiting for the other switching unit Q14 to turn off. Continuity. As described above, the electronic switch device 1 according to the present embodiment has an advantage that it is possible to perform control that is difficult to coincide with the control of other electronic switch devices 1. (4) Modifications

In this embodiment, the determination unit 53 is configured to determine an operation state of at least the other switching units Q14 based on the control state of the switching unit Q1 controlled by the control unit 5 and the monitoring result of the voltage monitoring unit 32. For example, the signal level of the control signal CS1 is the L level. When one cycle of the AC voltage Vac and the pulse width W1 does not reach the threshold multiple times in succession, the determination unit 53 determines that the other switching unit Q14 is in the on state. When the signal level of the control signal CS1 is at the L level and the pulse width W1 is continuously equal to or greater than the threshold 连续 multiple times within one cycle of the AC voltage Vac, the determination unit 53 determines that the other switching unit Q14 is in the off state.

In addition, when the signal level of the control signal CS1 is at the H level and the pulse width W1 does not reach the threshold 値 several times within one cycle of the AC voltage Vac, the determination unit 53 determines that the switching unit Q1 is operating normally. In addition, when the signal level of the control signal CS1 is at the H level and the pulse width W1 is continuously equal to or greater than the threshold 复 multiple times within one cycle of the AC voltage Vac, the determination unit 53 determines that the switching unit Q1 is abnormal. The reason is that if the switching part Q1 is normal, when the control for turning on the switching part Q1 is performed, regardless of the operating state of the other switching parts Q14, the pulse width W1 will not be repeatedly reached within a cycle of the AC voltage Vac. Threshold.

In addition, when the signal level of the control signal CS1 is at the H level, the determination unit 53 cannot determine the operation state of the other switch unit Q14. However, at this time, since the switch unit Q1 is in an on state, it is not necessary to determine the operating states of the other switch units Q14.

In this embodiment, the determination unit 53 determines the operating state of the other switching unit Q14 based on whether or not the pulse width W1 has continuously exceeded the threshold 値 (or less than the threshold 复) several times within one cycle of the AC voltage Vac, but may be other Make up. For example, the determination unit 53 can determine the operating state of the other switching unit Q14 by determining whether the half-cycle pulse width W1 of the AC voltage Vac is equal to or greater than the threshold value (or less than the threshold value). In addition, the determination unit 53 can determine the operating state of the other switching unit Q14 by determining whether the pulse width W1 is three times or more (or less than the threshold value) continuously.

In this embodiment, the pulse width W1 is a length of time during which the magnitude of the inter-switching voltage Vsw becomes equal to or greater than the reference 値 Vth10, but may be a length of time during which the magnitude of the inter-switching voltage Vsw does not reach the reference 値 Vth10. At this time, the determination unit 53 determines that the switching unit Q1 of the other electronic switching device 1 is in a non-conducting state when the pulse width W1 does not reach the threshold value. At this time, when the pulse width W1 is greater than or equal to the threshold value, the determination unit 53 determines that the switching portion Q1 of the other electronic switching device 1 is in the on state.

In the present embodiment, the determination unit 53 is configured to determine the operating state of the switching unit Q1 of the other electronic switching device 1 based on the pulse width W1, but may be another configuration. The determination unit 53 can determine the operation state of the other switching unit Q14 even when the pulse width W1 does not exist (that is, when the other switching unit Q14 is always on). For example, the determination unit 53 may determine that the switching portion Q1 of the other electronic switching device 1B is in an on state by detecting that the length of the time when the signal level of the signal S10 is at the H level exceeds the threshold 値 (for example, 500 [ms]). The threshold value is preferably set such that the length of time during which the inter-switch voltage Vsw does not occur due to instantaneous power failure is set.

In the present embodiment, the control unit 5 of the electronic switch device 1 is assumed to be configured to calculate a certain time after receiving an open control instruction, and then switch the switch unit Q1 from the on state to the off state. At this time, the control section 5 may wait for the other switch sections Q14 to switch from the on state to the off state and set the switch section Q1 to the on state, after receiving the open control instruction, or after the other switch sections Q14 switch to the off state, Calculate a certain time.

In this embodiment, the AC power source 11 is a single-phase 100 [V], 60 [Hz] commercial power source, but may be a single-phase 100 [V], 50 [Hz] commercial power source. The voltage 値 of the AC power supply 11 is not limited to 100 [V].

In the present embodiment, the detection unit 321 is configured to detect the zero-crossing when the voltage Vsw between the switches is switched from the negative polarity to the positive polarity, but it may be the opposite configuration. In other words, the detection unit 321 may be configured to detect a zero crossing when the voltage Vsw between the switching terminals is switched from the positive polarity to the negative polarity by the connection terminal 101-ground voltage level not reaching the reference level. Similarly, the detection unit 322 is configured to detect the zero-crossing when the voltage Vsw between the switches is switched from the positive polarity to the negative polarity, but it may be the opposite configuration. In other words, the detection unit 322 may be configured to detect the zero crossing when the voltage Vsw between the switching terminals is switched from the negative polarity to the positive polarity by the connection terminal 102-ground voltage not reaching the reference value.

In this embodiment, the voltage monitoring section 32 has two detection sections (detection sections 321 and 322), but the detection section may be one. At this time, the voltage monitoring unit 32 may be configured to detect a zero-crossing of the voltage Vsw between the switches by comparing the voltage Vsw between the switches with a reference 値. At this time, the voltage monitoring unit 32 outputs the detection signal S10 to the control unit 5. In this embodiment, the voltage monitoring unit 32 is configured to monitor the magnitude of the inter-switch voltage Vsw before full-wave rectification, but may be configured to monitor the magnitude of the inter-switch voltage Vsw after full-wave rectification.

In this embodiment, the load 12 is not limited to a lighting device, and may be, for example, an electric appliance such as a ventilator or a monitor. In addition, the load 12 is not limited to one appliance, and may be a plurality of appliances electrically connected in series or in parallel.

In the present embodiment, the switch unit Q1 is a bidirectional sluice fluid, but may be the other semiconductor switch. For example, the switching unit Q1 may be two MOSFETs that are electrically connected in series between the connection terminal 101 and the connection terminal 103. The two MOSFETs can be connected to each other through the source terminals, which is the so-called inverse series connection, to switch the current passing and blocking in both directions. The switching unit Q1 may be a semiconductor device having a dual gate structure using a semiconductor material with a wide energy gap such as GaN (gallium nitride).

In this embodiment, the auxiliary switching unit Q2 is a MOSFET, and it may be another semiconductor switch. For example, the auxiliary switching unit Q2 may be a capacitor such as an IGBT (Insulated Gate Bipolar Transistor).

In this embodiment, the sensor unit 31 is not limited to a human body sensor that detects whether a person is present, and may be, for example, a brightness sensor. The sensor unit 31 may include both a human body sensor and a brightness sensor. Furthermore, the electronic switch device 1 is not limited to the configuration that controls the switch section Q1 according to the detection result of the sensor section 31, and may be, for example, the electronic switch device 1 with a remote operation function, a timer function, or a dimming function. For example, if the electronic switch device 1 is equipped with a remote operation function, the control unit 5 controls the switch unit Q1 according to a wireless signal from a remote controller. Furthermore, the electronic switch device 1 may be configured to control the switch unit Q1 according to a person's operation on an operation unit such as a push switch or a touch switch.

When comparing 2 値 in the present embodiment, "above" includes both cases where two 値 are equal and when one of the two 超过 is more than the other. However, it is not limited to this, and "above" here may be equivalent to a case where only one of the two puppets exceeds the other, that is, "larger". In other words, whether the two cases are equal or not can be arbitrarily changed according to the setting of the base case, so there is no technical difference between "above" and "large". Similarly, "not reached" can be equated with "below".

In this embodiment, the configuration (switching elements Q12, Q13, etc.) for monitoring the charge detection signal S3 is not a necessary configuration of the electronic switching device 1, and this configuration can be appropriately omitted. At this time, if the control section 5 accepts the ON control instruction, the auxiliary switch section Q2 will be turned on only after the half-cycle of the AC voltage Vac passes based on the detection signal S10 from the detection section 3.

In the present embodiment, the electronic switching device 1A is operated in combination with other electronic switching devices 1B, but it can be operated as a single unit. (Embodiment 4)

Hereinafter, the electronic switching device 1 and the electronic switching system 10 according to the present embodiment will be described. However, since the basic configuration of this embodiment is common to the electronic switch device 1 and the electronic switch system 10 of the third embodiment, the same reference numerals are used for common points, and descriptions thereof are omitted. In the electronic switching device 1 of the present embodiment, the control unit 5 is configured to estimate the time point at which the operating state of the other switching unit Q14 is switched from the on state to the off state based on the monitoring result of the voltage monitoring unit 32. The control unit 5 is configured to set the operating state of the switch unit Q1 to the on state in accordance with the estimated time point. Therefore, in the electronic switching device 1 of this embodiment, the control unit 5 can switch the switching unit Q1 to the on state without waiting for the other switching unit Q14 to switch from the on state to the off state.

In this embodiment, the control unit 5 is configured to alternately repeat the first process and the second process before switching the switch unit Q1 from the on state to the off state. The first process is a process of turning on the switching unit Q1 for a period of time corresponding to two cycles of the AC voltage Vac. The second process is a process of turning on the switching unit Q1 for a time corresponding to a half cycle of the AC voltage Vac. That is, the first process is a process of turning on the switch unit Q1 for a longer time than the on time of the switch unit Q1 in the second process. Then, the control unit 5 is configured to set the switch unit Q1 to the off state when the third first process is executed.

Hereinafter, operations of the electronic switching device 1 and the electronic switching system 10 will be described with reference to FIG. 9. In the example of FIG. 9, the operation of the electronic switching device 1A will be described as the “other electronic switching device 1B” as the electronic switching device 1B seen from the electronic switching device 1A. Therefore, in the example of FIG. 9, the switching section Q1 of the electronic switching device 1B is another switching section Q14.

Fig. 9 shows the detection signal "S10" in the electronic switching device 1B, the operation state (conducting / non-conducting) of the other switching unit Q14, the detection signal "S10" in the electronic switching device 1A, The operating state (conduction / non-conduction) of the switching unit Q1. The detection signal S10 in the electronic switching device 1A is the same as the detection signal S10 in other electronic switching devices 1B. In the example in Figure 9, the signal level of the detection signal "S10" is the reference level when the voltage Vsw between switches is equal to or higher than Vth10, the level L, and the voltage between the switches Vsw does not reach the reference level. Level. In addition, for "Q1" indicating the operating state of the switch unit Q1 and "Q14" indicating the operating state of the other switch unit Q14, "ON" indicates conduction and "OFF" indicates non-conduction.

In the example of FIG. 9, at time t32, the switch portion Q1 of the electronic switch device 1A is in the off state, and the other switch portions Q14 of the other electronic switch devices 1B are in the on state. In the example of FIG. 9, at time t32, the control unit 5 of the electronic switching device 1A has received the opening control instruction from the sensor unit 31. In addition, the control unit 5 of the other electronic switching device 1B is before the time point t32, whenever the signal level of the detection signal S10 changes from the H level to the L level, that is, the time corresponding to a half cycle of the AC voltage Vac, that is, The normal process of turning on the switching unit Q1 is repeated. However, the control unit 5 of the other electronic switching device 1B repeats the first process and the second process alternately after the time point t32.

First, when the control unit 5 of the other electronic switching device 1B detects the signal level of the signal S10 from the H level to the L level at time point t32, it executes from time point t33 after time point t32 to time point t34. The first processing of the first time. Next, when the control unit 5 of the other electronic switching device 1B detects the signal level of the signal S10 from the H level to the L level at the time point t35 after the time point t34, the time point from the time point t36 after the time point t35 to the time point t37 In the meantime, the first and second processes are executed. Next, when the control unit 5 of the other electronic switching device 1B detects the signal level of the signal S10 from the H level to the L level at a time point t38 after the time point t37, the time point from the time point t39 after the time point t38 to the time point t40 In the meantime, the first processing of the second time is executed. Next, the control unit 5 of the other electronic switching device 1B detects the signal level of the signal S10 from the H level to the L level at a time point t41 after the time point t40, from the time point t42 to the time point t43 after the time point t41. In the meantime, the second processing of the second time is executed. Then, when the control unit 5 of the other electronic switching device 1B detects the signal level of the signal S10 from the H level to the L level at a time point t44 after the time point t43, the time point from the time point t45 after the time point t44 to the time point t46 In between, the first processing for the third time is executed. After the time point t46, the other switch sections Q14 are turned off.

Here, the control unit 5 of the electronic switching device 1A calculates a predetermined time whenever the signal level of the detection signal S10 is switched from the L level to the H level. Then, the control unit 5 of the electronic switching device 1A detects that the signal level of the signal S10 has been maintained at the H level until the calculation of the predetermined time, and judges that the ON condition has been satisfied once at the point when the predetermined time has been calculated. Then, if the control part 5 of the electronic switching device 1A determines that the ON condition of a predetermined number of times (here, 3 times) has been satisfied, the switching part Q1 is set to the ON state. In the example of FIG. 9, the first opening condition is satisfied from time point t33 to time point t34, and the second opening condition is satisfied from time point t39 to time point t40. Then, the time point t47 before the time point t46 satisfies the third turn-on condition, so the switch section Q1 is turned on. In other words, it can be considered that the control unit 5 determines the time point when the other switch unit Q14 is switched from the on state to the off state by satisfying the third on condition.

As described above, in the electronic switching device 1 of the present embodiment, the control unit 5 estimates the timing at which the other switching unit Q14 is switched from the on state to the off state. Then, the control unit 5 sets the switch unit Q1 to the on state according to the estimated time point. Therefore, in this embodiment, a blank time is hardly generated between the time when the other switching unit Q14 is switched to the off state and the time when the switching unit Q1 is switched to the on state, and it is difficult for the time when power is not supplied to the load 12 to occur. For example, if the load 12 is a lighting device, the switch portion Q1 can be switched to the on state when the other switch portion Q14 is switched to the off state, so that the load 12 can be prevented from being momentarily turned off. Moreover, in this embodiment, although there is a time during which the switching section Q1 and the other switching sections Q14 are turned on at the same time, since the time is relatively short, the control of the electronic switching device 1 and the control of other electronic switching devices 1 are not easy to occur. Concurrence. (Modification)

In the present embodiment, the first process is a process of turning on the switching unit Q1 at a time corresponding to two cycles of the AC voltage Vac, but the conducting time of the switching unit Q1 is not limited to this. That is, the first process may be a process of turning on the switch unit Q1 for a longer time than the on time of the switch unit Q1 in the second process.

In this embodiment, the control unit 5 is configured to set the switch unit Q1 to the on state if it is determined that the three-time on condition has been satisfied, but other configurations may be used. In other words, the control unit 5 may be configured to set the switch unit Q1 to the on state when it is determined that the “n” times (“n” is a natural number) on conditions have been satisfied.

In the electronic switching device 1 of the present embodiment, the control unit 5 is configured to alternately repeat the first process and the second process before the switch unit Q1 is switched from the on state to the off state, but other configurations may be used. . For example, the control unit 5 may be configured such that the switch unit Q1 is turned off when the first process is executed only once.

Hereinafter, operations of the electronic switch device 1 and the electronic switch system 10 in the case of the above-mentioned configuration will be described with reference to FIG. 10. In the example of FIG. 10, the operation of the electronic switching device 1A will be described as the “other electronic switching device 1B” as the electronic switching device 1B seen from the electronic switching device 1A, as in the example of FIG. 9. Therefore, in the example of FIG. 10, the switch section Q1 of the electronic switching device 1B is another switch section Q14. Fig. 10 shows the detection signal "S10" in the electronic switching device 1B, the operation state (conduction / non-conduction) of the other switching unit Q14, and Detects the signal "S10" and the operating state of the switch unit Q1 (conducting / non-conducting).

In the example of FIG. 10, at time t50, the switching portion Q1 of the electronic switching device 1A is in the off state, and the other switching portions Q14 of the other electronic switching devices 1B are in the on state. In the example of FIG. 10, at time t50, the control unit 5 of the electronic switching device 1A has received the opening control instruction from the sensor unit 31. In addition, the control unit 5 of the other electronic switching device 1B is before the time point t50, whenever the signal level of the detection signal S10 changes from the H level to the L level, that is, the time equivalent to a half cycle of the AC voltage Vac, that is, The normal process of turning on the switching unit Q1 is repeated. For example, if the control unit 5 of the other electronic switching device 1B detects the signal level of the signal S10 at the time point t48 before the time point t50 from the H level to the L level, it will be between the time point t49 after the time point t48 and the time point t50. , Will turn on the switch Q1. Then, the control unit 5 of the other electronic switching device 1B executes the first process only once after the time point t50.

That is, if the control unit 5 of the other electronic switching device 1B detects the signal level of the signal S10 at the time point t51 after the time point t50 from the H level to the L level, the time from the time point t52 after the time point t51 to the time point t53 In between, the first process is executed. Here, in the example of FIG. 10, the on-time of the switching unit Q1 in the first process is, for example, 300 [ms]. After the time point t53, the other switch sections Q14 are turned off.

Here, the control unit 5 of the electronic switching device 1A calculates a predetermined time whenever the signal level of the detection signal S10 is switched from the L level to the H level. Then, the control unit 5 of the electronic switching device 1A detects that the signal level of the signal S10 is maintained at the H level until the calculation of a predetermined time (for example, 250 [ms]), and determines that the on condition is satisfied when the predetermined time has been calculated. condition. When the control unit 5 of the electronic switching device 1A determines that the ON condition is satisfied, the switching unit Q1 is set to the ON state. In the example of FIG. 10, the switch condition Q1 is turned on because the ON condition is satisfied at time t54 between time t52 and time t53. In other words, the control unit 5 estimates the time point at which the other switch unit Q14 is switched from the on state to the off state when the on condition is satisfied.

The configuration (including modifications) of the fourth embodiment can be used in appropriate combination with the configuration (including modifications) of the third embodiment. (in conclusion)

As described above, the electronic switch device (1) according to the first aspect includes the switch section (Q1), the control section (5), the voltage monitoring section (32), and the determination section (53). The switch section (Q1) is electrically connected between the AC power source (11) and the load (12), and switches conduction and non-conduction between the AC power source (11) and the load (12). The control section (5) is a control switch section (Q1). The voltage monitoring unit (32) monitors the voltage across the switching unit (Q1), that is, the voltage between the switches (Vsw). The judging unit (53) is based on the monitoring result of the voltage monitoring unit (32), and the judging unit (53) is a switch of another electronic switching device (1, 1B) electrically connected between the AC power source (11) and the load (12). Part (Q1) is the operating state of other switch parts (Q14).

According to this configuration, the control unit (5) may control the switching unit (Q1) in consideration of the operating states of other switching units (Q14). That is to say, according to this configuration, there is an advantage that control that is difficult to coincide with control of other electronic switching devices (1) can be performed.

The electronic switch device (1) of the ninth aspect is the same as the first aspect, wherein the determination unit (53) is configured as follows. That is, the determination unit (53) is configured to determine at least the other switching unit (Q14) based on the control state of the switching unit (Q1) of the control unit (5) and the monitoring result of the voltage monitoring unit (32). ).

According to this configuration, it is possible to determine not only the operating state of other electronic switching devices (1, 1B), but also the state of the electronic switching device itself. However, this configuration is not necessary, and the determination unit (53) may be configured to make a determination based only on the monitoring result of the voltage monitoring unit (32).

The electronic switch device (1) of the tenth aspect is the same as the first aspect or the ninth aspect, wherein the determination unit (53) is configured as follows. In other words, the determination unit (53) is configured so that the pulse width (W1) is the length of time that is greater than or equal to the reference 値 (Vth10) or less than the reference 値 (Vth10) according to the magnitude of the voltage between switches (Vsw), and Determine the operating state of the other switch units (Q14).

According to this configuration, it is possible to determine the operation states of the other switch units (Q14) without complicated calculation processing. However, this configuration is not necessary, and the determination unit (53) is configured to make a determination based on the actual effect 値 (average 値) of the inter-switch voltage Vsw for a certain period of time.

The electronic switching device (1) in the eleventh aspect is like any one of the first aspect, the ninth aspect, and the tenth aspect, wherein the electronic switching device (1) further includes a power source section (43) and a feeding circuit. (430). The power supply unit (43) is configured to be electrically connected to the switch unit (Q1), and generates a control voltage of the control unit (5) by supplying power from an AC power source (11). The power feeding circuit (430) is configured to be electrically connected between the switch section (Q1) and the power supply section (43), and if the magnitude of the voltage (Vsw) between the switches is equal to or greater than a predetermined value, power is supplied. Go to the power supply section (43).

According to this configuration, it is not necessary to require a current converter to ensure the control voltage when the load (12) is energized, so that it can be miniaturized. However, this configuration is not necessary, and the electronic switching device (1) may be configured to include a current converter to secure a control voltage.

The electronic switch device (1) in the twelfth aspect is like any one of the first aspect, the ninth aspect to the eleventh aspect, and the control unit (5) is configured to receive the operation of the switch unit (Q1). When the state is set to the ON control instruction for the ON state, the operating state of the switch section (Q1) is set to the ON state. The ON state of the switch unit (Q1) is a state where power is supplied from the AC power source (11) to the load (12). The control unit (5) is configured to delay the process of setting the switch unit (Q1) to the ON state when the determination unit (53) determines that the operation state of the other switch unit (Q14) is on.

According to this configuration, it is difficult for the switch section (Q1) and other switch sections (Q14) to be turned on at the same time. That is, according to this configuration, it is possible to perform control that is difficult to coincide with the control of other electronic switching devices (1, 1B). However, this configuration is not necessary, and the control unit (5) may delay the process of setting the switch unit (Q1) to the ON state when the above conditions are satisfied. The electronic switch device (1) of the thirteenth aspect is the same as the twelfth aspect, wherein the control unit (5) is configured to set the operating state of the switch unit (Q1) to the on state according to the estimated time point. The control unit (5) is configured to estimate the time point at which the operating state of the other switching unit (Q14) is switched from the on state to the off state based on the monitoring result of the voltage monitoring unit (32). The off state of the other switching unit (Q14) is a state where the power supply from the AC power source (11) to the load (12) is blocked.

According to this configuration, the operating state of the switching unit (Q1) can be set to the on state without waiting for the operating state of the other switching unit (Q14) to switch to the off state. That is, according to this configuration, control subsequent to control of other electronic switching devices (1, 1B) can be performed. However, this configuration is not necessary, and the control unit (5) may not estimate the time point at which the operation state of the other switch unit (Q14) is switched from the on state to the off state.

The electronic switch system (10) of a fourteenth aspect is provided with a plurality of electronic switch devices (1) of any one of the first aspect, the ninth aspect, and the first aspect. The plurality of switching units (Q1) included in the plurality of electronic switching devices (1) are electrically connected in parallel between the AC power source (11) and the load (12).

According to this configuration, there is an advantage that control of each of the plurality of electronic switching devices (1) is difficult to compete with each other.

The electronic switching device 1 and the electronic switching system 10 according to the first to fourth embodiments have been described above. However, Embodiments 1 to 4 described above include the above-mentioned modified examples and are only one of various embodiments of the present invention. As long as the purpose of the present invention can be achieved, the above Embodiments 1 to 4 can be variously designed according to design and the like. change.

1, 1A, 1B, 1C‧‧‧Electronic switch
10, 10A‧‧‧ electronic switch system
11‧‧‧AC Power
101‧‧‧The first connection terminal
102‧‧‧ 2nd connection terminal
103‧‧‧3rd connection terminal
104‧‧‧The fourth connection terminal
12‧‧‧ load
2‧‧‧ Rectifier
3‧‧‧Circuit Department
31‧‧‧Sensor Section
32‧‧‧Voltage Monitoring Department
321‧‧‧The first detection section
322‧‧‧Second Detection Unit
4‧‧‧ Power generation block
401‧‧‧power input terminal
402‧‧‧Power output terminal
41‧‧‧The first feed circuit (feed circuit)
42‧‧‧Second feeder circuit (feeder circuit)
43‧‧‧Power Supply Department
430‧‧‧feed circuit
44‧‧‧ Switching Department
45‧‧‧ Regulator
46‧‧‧Current Limiting Section
47‧‧‧Charging path
5‧‧‧Control Department
51‧‧‧Switch control unit
52‧‧‧ Switching control unit
53‧‧‧Judgment Division
C1‧‧‧Capacitor
CS1‧‧‧1st control signal
CS2‧‧‧2nd control signal
D1‧‧‧diode
Q1‧‧‧Switch Department
Q2‧‧‧Auxiliary switch department
Q10, Q11, Q12, Q13, Q14‧‧‧Other switch
R0‧‧‧Resistor
R1‧‧‧1st resistor
R2‧‧‧Second resistor
R3‧‧‧3rd resistor
R4‧‧‧4th resistor
R5‧‧‧5th resistor
R6‧‧‧6th resistor
S1a, S1b‧‧‧ Surveillance signal
S3‧‧‧Charge detection signal
S10‧‧‧ Detection signal
S11‧‧‧1st detection signal
S12‧‧‧2nd detection signal
Vac‧‧‧AC voltage
Vsw‧‧‧Switching voltage
Vth1, Vth10‧‧‧ benchmark
W1‧‧‧Pulse width
ZD1‧‧‧1st Zener Diode
ZD2‧‧‧The second Zener diode

[Fig. 1] Fig. 1 is a schematic circuit diagram showing a configuration of an electronic switching device according to a first embodiment of the present invention. [Fig. 2] Fig. 2 is a schematic circuit diagram showing a configuration of an electronic switch system according to Embodiment 1 of the present invention. [Fig. 3] Fig. 3 is a timing chart showing the first operation of the electronic switch system as described above. [Fig. 4] Fig. 4 is a timing chart showing a second operation of the electronic switch system as described above. 5 is a schematic circuit diagram showing a configuration of an electronic switch system according to a second embodiment of the present invention. 6 is a schematic circuit diagram showing a configuration of an electronic switching device according to a third embodiment of the present invention. [FIG. 7] FIG. 7 is an explanatory diagram of the operation when the other switch parts of the electronic switch device are in the off state. [FIG. 8] FIG. 8 is an explanatory diagram of the operation when the other switch portions of the electronic switch device are on. [FIG. 9] FIG. 9 is an explanatory diagram of the operation of the electronic switching device according to the fourth embodiment of the present invention. [Fig. 10] Fig. 10 is an explanatory diagram of the operation of the electronic switching device according to a modification of the fourth embodiment.

Claims (14)

An electronic switching device, comprising: a switching unit electrically connected between an AC power source and a load, and switching between conduction and non-conduction between the AC power source and the load; a control unit that controls the switching unit A voltage monitoring unit that monitors the voltage across the switching unit, that is, the magnitude of the voltage between switches; and a determination unit that determines that it is electrically connected to the AC power source and the load based on the monitoring result in the voltage monitoring unit The operating states of the other switching units of the other electronic switching devices are the operating states of the other switching units. For example, the electronic switch device of the first patent application scope further includes: a power supply section which is electrically connected between both ends of the switch section and generates a control voltage by supplying power from the AC power supply; 2 or more A feeder circuit which is electrically connected between both ends of the switching portion and is configured as a path for supplying power between the switching portion and the power source portion; a switching portion which can use the path for supplying the power The feeder circuit is switched to any one of the two or more feeder circuits; and the switching control unit controls the switching unit according to the waveform of the voltage between the switches, and the control unit, that is, the switch control unit receives from the power source unit This control voltage is supplied to operate. For example, the electronic switching device of the second scope of the patent application, wherein: the voltage monitoring section is electrically connected between the switching section and the two or more feeder circuits. For example, the electronic switching device of the second or third scope of the patent application, wherein: the two or more feeder circuits include the first feeder circuit and the second feeder circuit, and the impedance of the first feeder circuit is lower than the second feeder circuit. Circuit. For example, the electronic switch device of the second or third item of the patent application scope, wherein the switching control unit controls the switching unit according to the length of time that the voltage between the switches is above the reference value or not reached the reference value, that is, the pulse width. For example, the electronic switching device of the fifth scope of the patent application, wherein: the two or more feeder circuits include a first feeder circuit and a second feeder circuit, the impedance of the first feeder circuit is lower than the second feeder circuit, and the pulse width The length of time when the voltage between the switches is equal to or greater than the reference value. When the pulse width does not reach the threshold value, the switching control unit controls the switching unit so that the first feeder circuit is used for the path for supplying power. For example, the electronic switch device of the second or third item of the patent application scope further includes a sensor section, and the switch control section is configured to control the switch section according to an output of the sensor section. An electronic switching system is characterized by having a plurality of electronic switching devices such as any one of items 2 to 7 of the scope of patent application, and a plurality of switching sections provided in the plurality of electronic switching devices are electrically charged. Connected in parallel between the AC power source and the load, once the switch portion of any one of the plurality of electronic switch devices becomes conductive, the other switch of the plurality of electronic switches is non-conductive. A switching device. The switching control unit controls the switching unit to switch a feeder circuit used for the path for supplying power. For example, the electronic switching device of the scope of application for a patent, wherein the determining section is configured to determine at least the other switching sections based on the control state of the switching section of the control section and the monitoring result of the voltage monitoring section. Operating state. For example, the electronic switch device of the first or the ninth scope of the patent application, wherein the determination unit is configured as follows: the length of the time between the voltage between the switches is equal to or greater than the reference value, or the length of the time, that is, the pulse width, Then, the operating state of the other switch unit is determined. For example, the electronic switch device of the first or the ninth scope of the patent application, further includes: a power supply section which is electrically connected to the switch section and generates a control voltage of the control section by supplying power from the AC power supply; And a power feeding circuit, which is electrically connected between the switching unit and the power source unit, and when the magnitude of the voltage between the switches is equal to or greater than a predetermined threshold, the supplied power is supplied to the power source unit. For example, the electronic switch device of the first or the ninth scope of the patent application, wherein: the control section is configured to: when it is received that the operating state of the switch section is set to an open state for supplying power from the AC power source to the load When the ON control instruction is turned on, the operating state of the switch unit is set to the ON state; and the control unit is configured to: when the ON control instruction is received, and the determining unit determines that the operating states of the other switch units are the When in the on state, the processing for setting the operating state of the switch unit to the on state is delayed. For example, the electronic switching device of the scope of application for the patent No. 12, wherein: the control unit is configured to estimate the operating state of the other switching unit from the ON state to the AC power source based on the monitoring result in the voltage monitoring unit. When the power supply of the load is blocked off, the operating state of the switch unit is set to the on state according to the estimated time point. An electronic switch system is characterized by having a plurality of electronic switch devices such as any one of claims 1, 9 to 13 in the scope of patent application, and a plurality of switch units provided in the plurality of electronic switch devices. It is electrically connected in series between the AC power source and the load.