JPH0341956B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a lighting power supply device for airport lighting or similar lighting methods.

[Conventional technology]

The airport lighting power supply device has a large number of regular stabilizing power supply circuits (constant current control power supply circuits) corresponding to a large number of lamp loads, and further has a standby stabilizing power supply circuit.
The regular stabilizing power supply circuit and the standby stabilizing power supply circuit are connected to the load via a regular-standby switching device.
Therefore, in the event of a breakdown or inspection/repair of the regular stabilized power supply circuit, power can be supplied via the standby stabilized power supply circuit. The airport lighting power supply device further includes a lighting direction switch for switching between two types of lamp loads arranged according to the approach and takeoff directions of the aircraft.

[Problem that the invention seeks to solve]

By the way, the regular/standby switch in a conventional airport lighting power supply device is configured to shut off one side and then turn on the other side in response to a remote control.
In contrast, a directional switch responds to remote control and
The configuration is such that before one is shut off, the other is turned on, and then the other is shut off. Therefore, it has been impossible to convert the regular-standby switching device into a directional switching device. Providing sufficient spares for each switch inevitably increases costs.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a lighting power supply device that can reduce the cost of the device and easily deal with failures.

To achieve the above object, the present invention will be described with reference to the reference numerals in the drawings showing the embodiments.
1, P2, a preliminary stabilizing power supply circuit P3 connected to a power source, and a circuit for selecting either one of the output of the first regular use stabilizing power supply circuit P1 and the output of the preliminary stabilizing power supply circuit P3. The first regular-standby switch A1, the output of the second regular-use stabilized power supply circuit P3, and either the standby stabilized power supply circuit P3 or another standby stabilized power supply circuit having the same configuration. Second service-standby switch A2 for selection
, a first lamp load L1 connected to the output terminal 11a of the first regular-standby switch A1, and a second lamp load L2 for illuminating a first direction.
and a third lamp load L3 for illuminating a second direction different from the first direction, and one of the second lamp load L2 and the third lamp load L3 is selected. Lighting direction switch B1 for
In the lighting power supply device comprising:
The regular/standby switch A1 includes a first switch S1 for connecting the first regular stabilized power supply circuit P1 to the first lamp load L1, and a first switch S1 for connecting the first regular stabilized power supply circuit P1 to the first lamp load L1 and a first switch S1 for connecting the first regular stabilized power supply circuit P1 to the first lamp load L1. a second switch S2 for connecting to the lamp load L1;
In response to a switching control command from the switch S1 to the second switch S2, the first switch S1
, and also controls the first regular stabilized power supply circuit P1 to turn off, and the first switch S1
and a first control circuit 8a that turns on the second switch S2 after a predetermined time T3 from when the switch is turned off, and the second regular-standby switch A2 has an output terminal 11b and a A third circuit for connecting the stabilized power supply circuit P2 to the output terminal 11b.
switch S3, and the preliminary stabilization power supply circuit P3.
or another pre-stabilized power supply circuit to the output terminal 11.
a fourth switch S4 for connecting the third switch S3 to the fourth switch S4;
In response to the switching control command, the third switch S3 is turned off and the second regular stabilized power supply circuit P2 is turned off, and after a predetermined time T3 from the time when the third switch S3 is turned off, the third switch S3 is turned off. A second control circuit 8b that turns on the fourth switch S4
The lighting direction switch B1 includes the output terminal 11b of the second regular-standby switch A2.
and a sixth switch S5 for connecting the output terminal 11b of the second regular-standby switch A2 to the third lamp load L3. Switch S6
In response to a switching command from the fifth switch S5 to the sixth switch S6, the fifth switch S5 is turned off, and the second regular stabilized power supply circuit P2 and the standby stabilized power supply are turned off. circuit P
3 or another pre-stabilized power supply circuit for a predetermined period of time, and a third control circuit 8c that controls the sixth switch S6 to be turned on after a predetermined period of time T3 from when the fifth switch S5 is turned off. , the first, second and third control circuits 8a, 8b, 8c.
This relates to a lighting power supply device characterized in that it is equipped with the same circuit so that these devices are compatible with each other.

[Effect]

Since the first, second, and third control circuits 8a, 8b, and 8c in the above invention include the same circuit, they can be used interchangeably.

〔Example〕

Next, an airport lighting power supply device according to an embodiment of the present invention will be explained with reference to FIGS. 1 to 4. FIG. 1 is a block diagram schematically showing the entire power supply device for airport lighting. In reality, there are more than three lamp loads, but in Figure 1, the first,
Only the second and third lamp loads L ₁ , L ₂ , L ₃ are shown. Of these, the second lamp load L ₂ illuminates the first direction, and the third lamp load L ₃ illuminates the second direction opposite to the first direction. Therefore, there is no need to drive the second lamp load _L2 and the third lamp load _L3 at the same time. Corresponding to multiple lamp loads L ₁ to L ₃ ,
First and second regular stabilized power supply circuits P ₁ and P ₂ are provided, and a standby stabilized power supply circuit P ₃ is further provided. Each power supply circuit P ₁ , P ₂ , P ₃ includes mechanical switches 2 a , 2 b , 2 connected to the AC power line 1 .
2c, thyristors 3a, 3b, 3c for current control connected in series thereto, switches 2a, 2b,
2c control circuits 4a, 4b, 4c, thyristor control circuits 5a, 5b, 5c, switches 2a, 2b,
2c off-detection circuits 6a, 6b, and 6c, and is configured to supply a constant current through output lines 7a, 7b, and 7c under phase control of thyristors 3a, 3b, and 3c. Regular use stabilized power supply circuit
The standby stabilizing power supply circuit _P3 for dealing with failures of _P1 and _P2 is usually provided at a ratio of one for every one to three regular stabilizing power supply circuits.

The first regular-standby switch _A1 is connected to the first and second
switches _S1 and _S2 , and a first control circuit 8a. One input terminal 9a is connected to the regular power supply line 7a, the other input terminal 10a is connected to the standby power supply line 7c, and the common output terminal 11
A first lamp load _L1 is connected to a.
Mechanical first and second switches S ₁ and S ₂ are connected between the one and the other input terminals 9a, 10a and the output terminal 11a. The first control circuit 8a has seven terminals a to g.

The second regular-standby switch A ₂ is connected to the third and fourth
switches _S4 and _S5 , and a second control circuit 8b. One input terminal 9b is connected to the regular power supply line 7b, the other input terminal 10b is connected to the standby power supply line 7c, and the common output terminal 11
b is connected to the input terminal 11c of the direction switch _B1 . Third and fourth mechanical switches S ₄ and S ₅ are connected between the input terminals 9b and 10b and the output terminal 11b. The second control circuit 8b has the same configuration as the first control circuit 8a, and has seven terminals a to g.

The directional switch B ₁ has a fifth and a sixth switch S ₅
and _S6 , and a third control circuit 8c. This input terminal 11c is connected to the output terminal 11b of the regular-standby switch _A2 , and one output terminal 9c is connected to the second
connected to the lamp load L ₂ of the other output terminal 1
0c is connected to the third lamp load _L3 .
Mechanically configured fifth and sixth switches are provided between the input terminal 11c and the pair of output terminals 9c and 10c.
S ₅ and S ₆ are connected. Third control circuit 8c
has the same configuration as the first control circuit 8a, and has seven terminals a to g.

The first and second control circuits 8a and 8b are switches.
In addition to the function of controlling on/off of _S1 to _S4 , it also has the function of controlling each power supply circuit _P1 , _P2 , and _P3 . Therefore, terminal a of control circuits 8a and 8b is connected to the power supply circuit.
It is connected to switch-off control circuits 4a and 4b of P ₁ and P ₂ , terminal b is connected to off-detection circuits 6a and 6b, terminal c is connected to switch-off control circuit 4c of auxiliary power supply circuit P _{3, and terminal d is connected to switch-off control circuit 4a and 4b of P 1 and} P 2. It is connected to the off detection circuit 6c, and the terminal e is in a disconnected state.
Terminals f and g are connected to a remote control switch.

Terminals a to d of the control circuit 8c of the direction switch _B1 are in a disconnected state, and the terminal e is connected to the thyristor control circuit 5b of the second regular stabilized power supply circuit _P2 and the thyristor control circuit of the standby stabilized power supply circuit _P3. The terminals f and g are connected to a remote control switch.

Since the first and second regular-standby switching devices A ₁ and A ₂ and the first and second control circuits 8a and 8b have the same configuration, the first control circuit 8a and
Explain only. The first control circuit 8a includes a first
second, third, fourth, fifth and sixth AND gates 12, 13, 14, 15, 16, 17;
Second, third and fourth delay circuits 18, 19, 2
0, 21 and the first and second switch cutoff circuits 2
2, 23, and first and second cutoff detection circuits 24,
25, a NOR gate 26, and first and second switch closing circuits 27 and 28.
It has 9. This main control section 29 has terminals h, i,
j, k, l are provided, and these terminals a, b,
Connected to c and d.

A sub-control unit designated by numeral 30 controls this as a direction changer.
This is necessary when diverting to the control circuit 8c of B ₁ , and the OR gate 31 and the two NOT circuits 3
2 and 33, an RS flip-flop 34, differential capacitors C ₁ and C ₂ , and resistors R ₁ and R ₂ .

Terminal a is connected to the off control circuit 4a of the first regular stabilized power supply circuit _P1 , terminal b is connected to the off detection circuit 6a, and terminal c is connected to the auxiliary stabilized power supply circuit.
It is connected to the off control circuit 4c of _P3 , the terminal d is connected to the off detection circuit 6c, the terminal e is disconnected, and the terminals f and g are connected to the remote control switch 35.

FIG. 3 shows the control circuit 8c of the directional switch _B1 .
In this control circuit 8c, the parts indicated by numerals 12 to 24 are the same as those indicated by the same numerals in FIG. That is, the third control circuit 8c has the same configuration as the first control circuit 8a. However, the usage of the terminals a to g in Fig. 3 is different from that in Fig. 2, in that the terminals a to d are not connected, and the terminal e is connected to the thyristor control circuit 5b of the second regular stabilizing power supply circuit _P2 . It is connected to the thyristor control circuit 5c of the preliminary stabilizing power supply circuit _P3 , and the terminals f and g are connected to a remote control switch 36 for changing direction.

〔motion〕

Next, the operation of the circuits shown in FIGS. 1 to 3 will be explained with reference to FIG. First regular-standby switch A ₁
The operation steps for switching from normal use to standby are as follows.

(1) Switch switch 35 from contact A to contact B.

(2) Stop the regular stabilized power supply circuit _P1 .

(3) Shut off the first switch _S1 .

(4) Turn on the second switch _S2 .

To explain in more detail, first, at time _t1 in FIG. 4, the contact point of the remote control switch 35 is switched from A to B. As a result, as shown in FIG. 4B, a high level closing command for the second switch _S2 is input to the terminal g. Since one input terminal of the first AND gate 12 is connected to the terminal g and the other input terminal is connected to the first cutoff detection circuit 24, both inputs become high level at _t1 . In addition, at t ₁ , the first switch S ₁
is still in the on state, so the first cutoff detection circuit 2
The output of 4 is high level. Since the output terminal of the first AND gate 12 is connected to the off control circuit 4a of the first stabilized power supply circuit _P1 via the terminals h and a, a high level off control signal is applied at _t1 . The switch 2a is turned off by the trip operation. However, there is a delay time from the off control at _t1 until it is completely turned off.

One input terminal is connected to terminal g, and the other input terminal is connected to off detection circuit 6a via terminals j and b.
The output of the AND gate 14 connected to turns to high level at time _t1 . Note that the off detection circuit 6
Even when the output of a is turned off at _t1 , it does not immediately switch to a low level, but switches from a high level to a low level with a delay. The high level output of the AND gate 14 obtained at t ₁ is input to the first delay circuit 18 of this output stage. The cutoff circuit 22 of the first switch S ₁ connected to the output of this first delay circuit ₁₈ receives the delayed signal of _FIG . The first switch S ₁ is tripped synchronously with the rising time t ₂ . When the first switch _S1 is cut off, the output of the cut-off detection circuit 24 consisting of an auxiliary contact connected thereto changes to a low level. Interruption detection circuit 25 of second switch _S2
Since both inputs of the NOR gate 26 to which the two cutoff detection circuits 24 and 25 are connected become low level at _t2 , this NOR gate 26 The output becomes high level as shown in FIG. Since one input terminal of the AND gate 16 is connected to the output of the NOR gate 26 and the other input terminal is connected to the terminal g, both inputs of the AND gate 16 become high level at t ₂ , and the fourth High level period in Figure H
Only from _t2 to _t3 , the command to turn on the second switch _S2 in FIG. 4B is input to the delay circuit 20, and at _t3 after a delay time _T3 , the high level output shown in FIG. 4E is generated. The closing circuit 27 of the second switch _S2 connected to the delay circuit 20 is activated at the time of rising to the high level in FIG. 4E.
The second switch _S2 is turned on in synchronization with _t3 . Second
When the switch _S2 is turned on at _t3 , the contact of the cutoff detection circuit 25 is turned on and the output returns to high level, so that the output of the NOR gate 26 returns to low level at _t4 .

One input terminal of the OR gate 31 is connected to the output of the AND gate 12, and the other input terminal is connected to the AND gate 12.
Since the output of the gate 13 is connected to the set terminal of the flip-flop 34 through the capacitor _C1 , the AND gate 1 is connected at _t1.
When the output of 2 goes high, flip-flop 34 is set and the output goes low as shown in FIG. 4G. flip flop 34
The reset terminal is connected to capacitor _C2 and NOT circuit 32.
Since it is connected to the NOR gate 26 via , it is reset at _t4 . flip flop 34
The output terminals of are connected to AND gates 14 and 15 via a NOT circuit 33, respectively. Therefore, t ₄
At this point in time, one input of AND gates 14 and 15 is always at a low level. However, the control circuit 8 in FIG.
In case a, since the off detection circuits 6a and 6c are connected to the AND gates 14 and 15, t ₃ or
AND gates 14 and 15 are turned off before t ₆ .

At _t5 , when contact A of the remote control switch 35 is turned on and a closing command for the first switch _S1 is generated as shown in FIG. 4A, one input terminal is connected to terminal f, and the other input terminal is connected to terminal f. The output of the second AND gate 13 connected to the cutoff detection circuit 25 of the second switch _S2 becomes high level. This second
The output of AND gate 13 is the preliminary stabilization power supply circuit P ₃
Since the switch 2c is connected to the off control circuit 4c, the switch 2c is controlled to be off at time _t5 , and the switch 2c is turned off a little later than this.

One input terminal is connected to the terminal f, and the other input terminal is connected to the off detection circuit 6c via the terminals k and d.
AND gate 15 connected to generates a high level output at _t5 . This high level output is maintained until the off detection circuit 6c generates a low level off detection signal a little later than _t5 . The output of the AND gate 15 is input to the second delay circuit 19 at the next stage, and at t ₆ , which is delayed by T ₂ from t ₅ , the delayed output shown in FIG _. Breaking circuit 2
Added to 3. This allows the second switch S ₂
is turned off by trip operation in synchronization with _t6 . As a result, the output of the cutoff detection circuit 25 changes from high level to low level. Both inputs of the NOR gate 26 then go low, and the output goes high as shown in FIG. 4H. One input terminal is connected to terminal f, and the other input terminal is NOR gate 2
The output of AND gate 17 connected to
It goes high at t ₆ and this delayed signal is obtained at t ₆ as shown in FIG. 4F. When the output of the fourth delay circuit 21 becomes high level at _{t7, which is delayed by T4 from t6 , the} closing circuit 28 of the first switch _S1 is activated.
The first switch _S1 is turned on. As a result, the output of the cutoff detection circuit 24 returns to high level,
The output of NOR gate 26 returns to a low level.

The operating steps of the directional switch _B1 shown in FIG. 3 are as follows.

(1) Switch the switch 36 from contact A to contact B.

(2) The gates of the thyristors of the regular and standby stabilizing power supply circuits P ₂ and P ₃ are stopped for a certain period of time.

(3) Shut off the fifth switch _S5 .

(4) Turn on the sixth switch _S6 .

This is substantially the same as the service-standby switching operation, except that the thyristor gate signal is stopped to control off the service and standby regulated power supply circuits P ₂ and P ₃ .

In the control circuit 8c of FIG. 3 for this direction changeover, terminals a, b, c, and d are kept disconnected, and instead, the direction changeover circuit B The second regular stabilized power supply circuit _P2 to which ₁ belongs and the standby stabilized power supply circuit _P3
thyristor control circuits 5b and 5c. Note that this terminal e is connected to the thyristor control circuits 5b and 5c so as to stop the gate signals of the thyristors 3b and 3c when this terminal is at a low level. In this directional switch _B1 , when the remote control switch 36 is switched from contact A to contact B in order to switch from the second lamp load _L2 to the third lamp load _L3 , the circuit operates in the same way as the circuit shown in FIG. De Switch S ₅
Switching from to _S6 is performed. That is, the first switch S1 in FIG. ₂ was replaced by the fifth switch _S5 in FIG. 3, and the second switch S2 in FIG. ₂ was replaced by the sixth switch S6 in _FIG . It becomes action. however,
In this case, the switch 2b of the second regular stabilizing power supply circuit _P2 and the switch 2c of the standby stabilizing power supply circuit _P3 are not controlled to turn off, and instead, the gate signals of the thyristors 3b and 3c are t ₁ ~ in the diagram
It is stopped only during the period t ₄ , t ₅ to _{t 8} , and the power is cut off. In addition, the off detection circuit 6 in FIG.
Since gates a and 6c are not connected, the output of flip-flop 34 is inverted by NOT circuit 33 and used to control AND gates 14 and 15. That is, while the flip-flop 34 is set, the switching command signal passes through the AND gates 14 and 15.

As mentioned above, the regular-standby switching device A ₁ and the direction switching device B ₁ have substantially the same configuration, so
When the highly important directional switch _B1 breaks down, it can be disconnected from the less important regular-standby switch _A1 circuit and used as the directional switch _B1 . When the entire regular-standby switch A ₁ is diverted, the terminals 9 a and 11 a may be connected by a conductive wire to continue supplying power to the first lamp load L ₁ . In addition, the control circuit 8 of the direction switch B ₁
If only c is out of order, switch between regular and standby switch.
Only the control circuit 8a of _A1 may be used, and the switch _S1 or _S2 may be kept in the closed state manually.

[Modified example]

The present invention is not limited to the embodiments described above, and the following modifications are possible, for example.

(A) The sub-control unit 30 may be omitted from the control circuit 8a in FIG.

(B) A monostable multivibrator triggered by the output of the OR gate 31 is provided in place of the flip-flop 34, and the pulse width of this monostable multivibrator is
The gate signal of the thyristors 3b and 3c may be stopped by setting T ₁ +T ₃ or more.

(C) Delay circuits 18, 19, 20, and 21 are connected to a first monostable multivibrator that is triggered by the rising edge of the high-level output of AND gates 14, 15, 16, and 17, and this first monostable multivibrator. It may also be configured with a second monostable multivibrator triggered at the trailing edge of the set times T ₁ , T ₂ , T ₃ , T ₄ . In short, cut off T ₁
Alternatively, any circuit that can delay the input of T ₂ by T ₁ +T ₃ or T ₂ +T ₄ may be used.

〔Effect of the invention〕

As is clear from the above, the first and second aspects of the present invention
Since the and third control circuits have the same circuit, they can be used interchangeably, and it becomes possible to easily deal with failures.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an airport lighting power supply device according to an embodiment of the present invention, FIG. 2 is a block diagram showing the control circuit 8a of FIG. 1, and FIG. 3 is a block diagram showing the control circuit 8c of FIG. 1. , FIG. 4 is a waveform chart showing states A to H in FIGS. 2 and 3. 8a, 8b, 8c...control circuit, 18, 19, 2
0, 21... Delay circuit, 22, 23... Cutoff circuit, 2
4, 25... Cutoff detection circuit, 27, 28... Closing circuit, P ₁ , P ₂ ... First and second regular stabilized power supply circuit, P ₃ ... Standby stabilized power supply circuit, A ₁ , A ₂ ... First and a second service-standby switch, A ₃ ... direction switch.

Claims (1)

[Scope of Claims] 1. First and second regular stabilized power supply circuits P1 and P2 connected to a power source; Preliminary stabilized power supply circuit P3 connected to a power source; and the first stabilized regular power source circuit. a first regular-standby switch A1 for selecting either the output of P1 or the output of the preliminary stabilization power supply circuit P3;
and a second regular use for selecting either one of the output of the second regular use stabilized power supply circuit P3 and the reserve stabilized power supply circuit P3 or another reserve stabilized power supply circuit having the same configuration. a standby switch A2; and an output terminal 1 of the first regular-standby switch A1.
1a, a second lamp load L2 for illuminating a first direction, and a third lamp load L2 for illuminating a second direction different from the first direction. A lighting power supply device comprising: a lamp load L3; and a lighting direction switch B1 for selecting either the second lamp load L2 or the third lamp load L3; The regular-standby switch A1 is the first
a first switch S1 for connecting the regular stabilized power supply circuit P1 of the lamp to the first lamp load L1;
a second switch S2 for connecting the pre-stabilized power supply circuit P3 to the first lamp load L1;
and, in response to a switching control command from the first switch S1 to the second switch S2, the first switch S1 is turned off and the first regular stabilized power supply circuit P1 is turned off, a first control circuit 8a that turns on the second switch S2 after a predetermined time T3 from when the first switch S1 is turned off; the second regular-standby switch A2 has an output terminal 11b; , a third switch S3 for connecting the second regular stabilizing power supply circuit P2 to the output terminal 11b, and connecting the preliminary stabilizing power supply circuit P3 or another preliminary stabilizing power supply circuit to the output terminal 11b. a fourth switch S4 for controlling the third switch S3 to turn off the third switch S3 in response to a switching control command from the third switch S3 to the fourth switch S4; and a second control circuit 8b that controls the power supply circuit P2 to turn off and turns on the fourth switch S4 after a predetermined time T3 from the time when the third switch S3 turns off, and the lighting direction switch B1 includes: Said second common use-
The output terminal 11b of the preliminary switch A2 is connected to the second
a fifth switch S5 for connecting the lamp load L2 to the lamp load L2; and a sixth switch S6 for connecting the output terminal 11b of the second regular-standby switch A2 to the third lamp load L3. , the fifth
In response to a switching command from the switch S5 to the sixth switch S6, the fifth switch S5 is turned off, and the second regular stabilized power supply circuit P2 and the standby stabilized power supply circuit P3 or another The preliminary stabilization power supply circuit is controlled to be turned off for a certain period of time, and a predetermined period of time T starts from the time when the fifth switch S5 is turned off.
and a third control circuit 8c that turns on the sixth switch S6 after 3 seconds, and the first, second and third control circuits 8a, 8.
A lighting power supply device characterized in that b and 8c are equipped with the same circuit so that they are compatible with each other.