JPH0448006B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a phase control device that transmits control data and the like in a two-wire system.

BACKGROUND ART FIG. 1 is an electrical circuit diagram of a conventional data transmission device for transmitting control data and the like. The main body processing section A1 is composed of a power source E1, photocouplers 4, 5, and 6, and resistors 7, 8, and 9. The operating section B1 has switches 1, 2, and 3, one end of the switch 1 is connected to one end of the resistor 7 via a line l1, one end of the switch 2 is connected to one end of the resistor 8 via a line l2, One end of switch 3 is connected to one end of resistor 9 via line l3. switch 1,
The other ends of 2 and 3 are respectively grounded via line l4. When switch 1 is turned on, current from power source E1 flows through photocoupler 4 and resistor 7 through line l1 in the direction of arrow F1, and through line l4 to ground. By this, photocoupler 4
operates and sends out a signal from output Q1. When the switch 2 is turned on, the current from the power source E1 flows through the photocoupler 5 and the resistor 8 to the line l2 at the arrow F.
2 and flows to ground via line 14, and photocoupler 5 operates. When the switch 3 is turned on, the current from the power source E1 flows through the photocoupler 6 and the resistor 9 through the line 13 in the direction of the arrow F3, and through the line 14 to ground, and the photocoupler 6 is activated. As described above, when switch 1 is turned on, a signal is sent from the output Q1 of photocoupler 4, when switch 2 is turned on, a signal is sent from output Q2 of photocoupler 5, and when switch 3 is turned on, a signal is sent from output Q3 of photocoupler 6. be done. Electrical equipment and the like are controlled by such signals.

As described above, in the circuit shown in FIG. 1, the number of transmission lines for transmitting signals requires a large number of switches and a number of common lines, which makes wiring complicated and increases costs.

Purpose The purpose of the present invention is to solve the above-mentioned technical problem,
The purpose of the present invention is to provide a phase control device that uses two-wire wiring as a transmission line for transmitting signals and realizes a low cost.

Configuration The present invention includes: an AC power source E6; a lighting load L6; and a control terminal connected in series to the AC power source E6 and the lighting load L6, and conduction or interruption depending on an input signal to the control terminal. a first line l66 connected to one end of the semiconductor switching element 64; a second line l67 connected to the other end of the semiconductor switching element 64; 1 line connected in series to line l66.
a first photocoupler 61 having a light emitting diode 61a and detecting a current flowing in the forward direction of the first light emitting diode 61a; a second photocoupler 62 having a second light emitting diode 62a connected thereto and detecting a current flowing in the forward direction of the second light emitting diode 62a; When the first photocoupler 61 detects a current, it changes the firing phase angle of the semiconductor switching element 64 to increase the illuminance of the lighting load L6, and when the second photocoupler 62 detects a current, it changes the firing phase angle of the semiconductor switching element 64 to increase the illuminance of the lighting load L6. means 63 for controlling the phase of the semiconductor switching element 64 according to the direction of the detected current by changing the firing phase angle of the semiconductor switching element 64 so as to lower the illuminance; and the first and second lines l66. , l67, and controls on/off the direction of the current detected by the first photocoupler 61; second switching means Tr62, D62 that controls on/off the current in the direction detected by the photocoupler 62; potential difference detection means 65 that detects the potential difference between both terminals of the semiconductor switching element 64 via the lines 166, 167; R63; input means 69 for inputting a phase angle to control the switching element 64; The first or second switching means Tr61, D61, Tr6 calculates a phase angle for controlling the semiconductor switching element 64 from the potential difference, and so that this phase angle matches the phase angle input by the input means 69.
2. Means 66, 67 for on/off control of D62;
68.

Embodiment FIG. 2 is an electric circuit diagram for explaining the principle of the present invention. In the main body processing section A2, terminal a
1 is connected to the power supply Vcc via a resistor 11, and is also connected to the collector of a phototransistor 12a of a photocoupler 12. The terminal a2 is connected to the power supply Vcc via the resistor 10, and is also connected to the collector of the phototransistor 13a of the photocoupler 13. The cathode of the light emitting diode 12b of the photocoupler 12 is connected to one end of the AC power source E2 via the line l7, and the anode of the light emitting diode 12b is connected to the line l5 via the resistor 14. The anode of the light emitting diode 13b of the photocoupler 13 is connected to one end of the AC power supply E2 via the line l7, and the cathode of the light emitting diode 13b is connected to the resistor 14.
is connected to line l5 via. AC power supply E2
The other end is connected to line l6 via line l8 and resistor 15.

The operating section B2 has diodes 16, 17 and switches 18, 19, 20. diode 1
The anode of switch 6 is connected to line l5, and its cathode is connected to one end of switch 18. The other end of switch 18 is connected to line l6. The cathode of diode 17 is connected to line l5,
Its anode is connected to one end of switch 19. The other end of switch 19 is connected to line l6. Both ends of switch 20 are connected to line l5 and line l6.

The operation will be explained below with reference to FIG. FIG. 3 1 shows the output waveform of the AC power source E2. When switch 18 is turned on, the output shown in FIG. 3 is rectified by diode 16, and the signal shown in FIG. 3 flows through line 15 and line 16. The photocoupler 13 is activated by this signal and sends out a signal as shown in FIG. 3 from the terminal a2. At this time, the signal at the terminal a1 is at a high level as shown in FIG. 36.

When switch 19 is turned on, the signal is rectified by diode 17, and the signal shown in FIG. 3 flows through line 15 and line 16. The photocoupler 12 operates in response to this signal and sends out a signal as shown in FIG. 38 from the terminal a1. At this time, terminal a2
When switch 20 is turned on, or when switches 18 and 19 are turned on at the same time, the signals on lines 15 and 16 are at high level as shown in FIG. 3, 4. A signal flows. This signal causes the photocoupler 12 and the photocoupler 13 to operate, and a signal as shown in FIG. 3 is sent out from the terminal a2, and a signal as shown in FIG. 3 is sent out from the terminal a1.

In this way, three modes can be distinguished based on the differences in the specifications of the signals sent from the terminals a1 and a2.
In other words, which of switches 18, 19, and 20 is in operation, or whether switch 18 is on or not?
It can be determined whether the switch 19 is on or the switches 18 and 19 are on simultaneously. Note that the operating section B2 shown in FIG. 2 is the operating section b2 shown in the left diagram.
It can also be replaced with The operating section b2 has diodes 21 and 22 and switches 23 and 24. The switch 23 is the switch 18 of the operating section B2.
The switch 24 corresponds to the switch 19 of the operation section B2, and the operation is the same.

FIG. 4 is an electrical circuit diagram forming another basis of the present invention. In FIG. 4, components corresponding to those shown in FIG. 2 are given the same reference numerals. In the main body processing section A3, the terminal a1 is connected to the power supply Vcc via the resistor 31, and is also connected to the output terminal of the voltage comparator 32. Terminal a2 is connected to power supply Vcc via resistor 30, and also to the output terminal of voltage comparator 33. One input terminal of the voltage comparator 32 is connected to the output terminal of the differential amplifier 34,
A positive reference potential is applied to the other input terminal of the voltage comparator 32. One input terminal of the voltage comparator 33 is connected to the output terminal of the differential amplifier 35, and the other input terminal of the voltage comparator 33 is given a negative reference potential. Both input terminals of the differential amplifier 34 are connected to a resistor 36, and both input terminals of the differential amplifier 35 are connected to a resistor 36.
Connected to 7. The anode of diode 38 is connected to one end of resistor 36 and line l7, and the cathode of diode 38 is connected to the other end of resistor 36 and the cathode of diode 39. The cathode of the diode 39 is connected to one end of the resistor 37,
The anode of diode 39 is connected to the other end of resistor 37 and line l5.

Both ends of the AC power supply E2 are line l7 and line l.
8. The line l8 is connected to the switch 1 of the operating section B2 via the resistor 40 and the line l6.
8, 19, and 20. The other end of switch 18 is connected to the cathode of diode 16, and the other end of switch 19 is connected to the anode of diode 17. anode of diode 16,
The cathode of diode 17 and the other end of switch 20 are connected to line 15.

The operation will be described below with reference to the waveform diagram of FIG. 3. When switch 18 is turned on, line l5
A signal shown in FIG. 32 flows through. This signal is
The current flows through the resistor 37 in the direction indicated by arrow F5, but does not flow through the diode 39. This generates a voltage across the resistor 37, which is amplified by the differential amplifier 35. The voltage comparator 33 removes noise from the output of the differential amplifier 35 and sends out a signal as shown in FIG. 3. When switch 19 is turned on, a signal shown in FIG. 3 flows through line 15. This signal flows through resistor 36 in the direction indicated by arrow F4 and does not flow through diode 38. This generates a voltage across resistor 36, which voltage is amplified by differential amplifier 34. Voltage comparator 3
2 cuts noise from the output of the differential amplifier 34 and sends out a signal as shown in FIG. 38. When switch 20 is turned on, or when switches 18 and 19 are turned on at the same time, a signal as shown in FIG. 3 flows through line 15. This signal causes voltages to be generated alternately in the resistor 37 and the resistor 36. Therefore, the voltage comparator 33 sends out the signal shown in FIG. 3, and the voltage comparator 32 sends out the signal shown in FIG. 3, 10.

FIG. 5 is an electrical circuit diagram of one embodiment of the present invention. One end of the AC power source E6 is connected to the terminal K1 of the main processing unit A6, and the other end is connected to the terminal K2 via the lighting load L6. Terminal K1 is connected to line l
61, it is connected to a phase control section 63 and a first anode of a triax 64, which is a semiconductor switching element. Further, the terminal K1 is connected to the input terminals of the photocoupler 61 and the photocoupler 62. Terminal K2 is connected to phase control section 63 via line l62.
and a second anode of triax 64. The cathode of the light emitting diode 61a of the photocoupler 61, which is the first current detection means, and the anode of the light emitting diode 62a, of the photocoupler 62, which is the second current detection means, are connected to the terminal K via a resistor R64.
Connected to 3. Terminal K2 is connected to terminal K4 via resistor R65. The collector of the phototransistor 61b of the photocoupler 61 is connected to the line l63.
It is connected to the phase control section 63 via. line l
63 is supplied with the power supply Vcc via a resistor R66. Phototransistor 62b of photocoupler 62
The collector of is connected to the phase control section 63 via line l64. Line 64 has a resistor R67
Power supply Vcc is applied via. Triack 64
The gate of is connected to the phase control unit 6 via line l65.
Connected to 3.

Terminal K5 of operating portion B6 is connected to terminal K3 via line l66, and terminal K6 is connected to terminal K4 via line l67. Terminal K5 is connected to the anode of diode D61 and transistor Tr.
62 emitters. The terminal K6 is connected to the anode of the diode D62 via the light emitting diode 65a of the photocoupler 65, and is also connected to the emitter of the transistor Tr61. The collector of the transistor Tr61 is connected to the cathode of the diode D61, and the base thereof is connected to one output terminal of an IO (input/output) port 66 via a resistor R61. The cathode of the diode D62 is connected to the collector of the transistor Tr62, and the base of the transistor Tr62 is connected through the resistor R62.
It is connected to the other output terminal of the IO port 66.
That is, the transistor Tr61 and the diode D
61 constitutes a first switching means, and the transistor Tr62 and diode D62 constitute a second switching means.

IO port 66 is connected via bus line l68
It is connected to a CPU (central processing unit) 67 and memory 68 . Further, the input terminal of the IO port 66 is connected to the collector of the phototransistor 65b of the photocoupler 65 via the line l69, and is connected to the collector of the phototransistor 65b of the photocoupler 65.
Connected to power supply Vcc via. Photocoupler 65
constitutes a potential difference detection means together with the resistor R63. The keyboard 69, which is an input means, is connected to the line l
It is connected to the CPU 67 via 70.

The operation will be described below with reference to the waveform diagram in FIG. The memory 68 of the operation unit B6 stores the lighting load L6.
Data on the firing phase angle of the triax 64, which controls the current of the triac 64, is stored. This data is input from the keyboard 69 to the CPU 67 as data of a control request intended by the operator. When data is input to the CPU 67, the CPU 67 stores the data in the memory 68 and momentarily turns on the transistor Tr62 via the IO port 66. If the transistor Tr62 is not turned on momentarily, the photocoupler 62 of the main body processing section A6 will be turned on, and information regarding the operation will be transmitted to the phase control section 63. Turning on the transistor Tr62 momentarily in this way is caused by the triax 6 that controls the phase of the lighting load L6.
This is to detect what the ignition phase angle of No. 4 is.

The voltage waveform supplied from the AC power source E6 is shown in FIG. 61. The phase control voltage waveforms across the triax 64 are shown in FIGS. 6-2 and 6-4. This voltage is applied via lines l66, l67 to terminals K5, K
When the transistor Tr62 is turned on, the light emitting diode 65 emits light on the positive polarity side.

At this time, resistor R63 and phototransistor 65b
At the connection point a with the collector, a pulse as shown in FIG. 6 is generated. By detecting the high level time of the signal at connection point a, it is possible to know at what point the phase control section 63 is currently setting the firing phase angle of the triax 64.

When the transistor Tr62 is turned on, the current from the AC power source E6 is rectified by the diode D62, and the current flows through the line l66 in the direction indicated by the arrow F62. This turns on the photocoupler 62. On the other hand, if transistor Tr61 turns on,
The current from the AC power source E6 is rectified by the diode D61, and the current flows through the line l67 in the direction indicated by the arrow F61, turning on the photocoupler 61.

Here, it is assumed that when the photocoupler 61 is turned on, the illuminance of the lighting load L6 is increased, and when the photocoupler 62 is turned on, the illuminance of the lighting load L6 is decreased. For example, the current firing phase angle of the phase control section 63 is read out from the memory 6 by the CPU 67.
If the phase angle is larger than the phase angle stored in advance in 8, the transistor Tr62 is turned on. As a result, a current flows through line l66 in the direction indicated by arrow F62. At this time, since the transistor Tr61 is turned off, no current flows in the reverse direction.
When a current flows in the direction of arrow F62 through line l66, photocoupler 62 is turned on, and an illuminance down instruction to lower the illuminance of lighting load L6 is given to phase control section 63. After the illuminance reduction instruction is issued, the phase control section 63 decreases the firing phase angle of the triax 64 and begins to change the illuminance of the illumination load L6 in the direction of lowering it. The firing phase angle changes slowly and the amount of change corresponds to time. CPU67 is
After the transistor Tr62 is turned on, the voltage waveform at the constant connection point a is detected. Since the transistor Tr62 is turned on, there is no need to turn it on again for detection. That is, if the CPU 67 detects the signal waveforms shown in FIGS. 6-3 and 6-5, it can know the current position of the firing phase angle sent from the phase control section 63. The CPU 67 stores the ignition phase angle sent from the phase control unit 63 in the memory 6.
The transistor Tr62 continues to be turned on until the phase angle stored in 8 is reached. When the ignition phase angle sent from the phase control section 63 reaches the desired value,
The CPU 67 turns off the transistor Tr62.

Note that the waveform shown in FIG. 62 is a waveform diagram of the phase control voltage when the lighting load L6 is fully lit.
The waveform shown in FIG. 63 shows the signal at the connection point a when the photocoupler 65 is turned on, and the signal becomes low level when the photocoupler 65 is on.
High level when is off. FIG. 6 is a waveform diagram of the phase control voltage when the lighting load L6 is turned off. Figure 6.5 shows connection point a when the light is off.
The signal becomes low level when the photocoupler 65 is on, and becomes high level when the photocoupler 65 is off.

When increasing the illuminance of the lighting load L6, the transistor Tr62 changes from on to off, and the transistor Tr61 changes from off to on. This turns off the photocoupler 62, turns on the photocoupler 61, and instructs the phase control section 63 to increase the illuminance. In this case, in order to detect the firing phase angle, the transistor Tr62 may be turned on intermittently, for example, once every 0.5 seconds. The ON time may be at least half a cycle on the positive polarity side of the AC power supply voltage waveform in which the light emitting diode 65a is in the forward direction.

Alternatively, the rate of change over time of the ignition phase angle in response to an instruction to the phase control section 63 may be made constant, and the ignition phase angle may be controlled to a desired value depending on the time for which the instruction is continued. In this case, either the transistor Tr61 or Tr62 is turned on depending on the phase angle of the difference between the detected current value and the set value of the memory 68.

Effects As described above, according to the present invention, power control by phase control of the lighting load L6 can be performed from a remote location. Further, since signals related to the control can be transmitted through two lines 166 and 167, the wiring becomes simple and the cost is low.

Furthermore, since the firing phase angle of the semiconductor switching element 64 for power control of the lighting load L6 can be set from the input means 69, the lighting load L6
6, the illuminance can be easily adjusted.

[Brief explanation of the drawing]

Figure 1 is an electric circuit diagram of a conventional phase control device, Figures 2 and 4 are electric circuit diagrams that are the basis of the present invention, and Figure 3 explains the operation of the circuits in Figures 2 and 4. FIG. 5 is an electric circuit diagram of an embodiment of the present invention, and FIG. 6 is a waveform diagram for explaining the operation of the circuit shown in FIG. 61, 62, 65...Photocoupler, 63...Phase control unit, 64...Triack, 66...I/O port, 67...Central processing unit, 68...Memory, 69...Keyboard, Tr61, Tr62...
Transistor, D61, D62...diode,
R61 to R67...Resistance, l66, l67...Line, E6...AC power supply, L6...Lighting load.

Claims (1)

[Scope of Claims] 1. An AC power source E6; a lighting load L6; connected in series to the AC power source E6 and the lighting load L6, and having a control terminal, and conduction or interruption by an input signal to the control terminal. a first line l66 connected to one end of the semiconductor switching element 64; a second line l67 connected to the other end of the semiconductor switching element 64; The first line connected in series to the first line l66
a first photocoupler 61 having a light emitting diode 61a and detecting a current flowing in the forward direction of the first light emitting diode 61a; a second photocoupler 62 having a second light emitting diode 62a connected thereto and detecting a current flowing in the forward direction of the second light emitting diode 62a; When the first photocoupler 61 detects a current, it changes the firing phase angle of the semiconductor switching element 64 to increase the illuminance of the lighting load L6, and when the second photocoupler 62 detects a current, it changes the firing phase angle of the semiconductor switching element 64 to increase the illuminance of the lighting load L6. means 63 for controlling the phase of the semiconductor switching element 64 according to the direction of the detected current by changing the firing phase angle of the semiconductor switching element 64 so as to lower the illuminance; and the first and second lines l66. , l67, and controls on/off the direction of the current detected by the first photocoupler 61; second switching means Tr62, D62 that controls on/off the current in the direction detected by the photocoupler 62; potential difference detection means 65 that detects the potential difference between both terminals of the semiconductor switching element 64 via the lines l66, l67; R63; input means 69 for inputting a phase angle to control the switching element 64; The first or second switching means Tr61, D61, Tr6 calculates a phase angle for controlling the semiconductor switching element 64 from the potential difference, and so that this phase angle matches the phase angle input by the input means 69.
2. Means 66, 67 for on/off control of D62;
68.