JPS6142515B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a general control circuit that performs sequential activation and termination.

A conventional device of this type will be explained with reference to FIGS. 1, 2, and 3.

In the figure, 1 is the start push button, 2 is the stop push button, and 3
3a and 3b are the auxiliary normally open contacts of the starting relay 3, 4 is the flicker relay, 4a is the auxiliary normally open contact of the flicker relay, 4b is the auxiliary normally closed contact of the flicker relay, and 5 is the auxiliary normally open contact of the flicker relay 4a. Relays to amplify; 5a and 5b are auxiliary normally open contacts of relay 5; 6 is a relay that amplifies flicker relay auxiliary normally closed contact 4b; 6a;
and 6b are auxiliary normally open contacts of relay 6, 8, 9,
10 and 11 are contactors 8a, 8b, and 9a for the first, second, third, and fourth motors, respectively.
and 9b, 10a and 10b and 11b and 11b are auxiliary normally open contacts of the first, second, third and fourth motor contactors 8, 9, 10 and 11, respectively;
c, 9c, 10c and 11c are the first,
main contacts for the second, third and fourth motors, 12;
13, 14 and 15 are first, second, third and fourth dummy relays for motor bypass, respectively; 12a and 12b, 13a and 13b, 14a and 14b and 15a and 15b are first, second, and fourth motor bypass relays, respectively; Dummy relay 12 for the third and fourth motors,
Auxiliary normally open contacts 13, 14, 15, 16, 17,
18 and 19 are signal contacts that open when the first, second, third and fourth motors are bypassed, respectively;
20, 21, 22 and 23 are the first,
Signal contacts 24, 25, 26 and 27 close when the second, third and fourth motors are bypassed, signal contacts 28, which open when the first, second, third and fourth motors are commanded to stop, respectively; 29, 30 and 31 are signal contacts that open when the first, second, third and fourth motors fail, respectively; 32, 33, 3;
4 and 35 are the first, second, third and fourth motors respectively; 36, 37, 38 and 39 are breakers for the first, second, third and fourth motors respectively; 40 and 41 are DC or AC , and 42 is a motor main power source.

Although the illustrated embodiment shows four motor circuits, there is no need to limit the number of motors.

Next, the operation will be explained. When the start push button 1 is turned on, the relay 3 and the flicker relay 4 are energized, the auxiliary normally open contact 3a is closed, and the relay 3 and the flicker relay 4 are self-held. At the same time, auxiliary normally open contacts 3a and 4a are closed and relay 5 is energized. At the same time, the auxiliary normally open contact 4b is opened, so the relay 6 is not energized.

Next, after one flicker period of the flicker relay 4 has elapsed, the auxiliary normally open contact 4a is opened and the auxiliary normally closed contact 4b is closed, so that the relay 5 is deenergized and the relay 6 is energized. Similarly, Fritskarrelay 4
After the next flicker cycle, the auxiliary normally open contact 4a closes, the auxiliary normally closed contact 4b opens, and the relay 5
is energized and relay 6 is deenergized. In this way, the alternately repeated flicker signal from the flicker relay 4 causes the relays 5 and 6 to be alternately energized and deenergized. That is, when the start push button 1 is turned on, the auxiliary normally open contacts 5a and 5b are immediately closed. When the auxiliary normally open contact 5a is closed, the first motor contactor 8 is energized, thereby the contact 8a is closed and self-held, the main contact 8c is closed, and the first motor 32 is started. Furthermore, contact 8b is also closed. At that time, the auxiliary normally open contact 5b is also closed, but since the auxiliary normally open contact 6a is still open, the second
Since the motor contactor 9 is not energized and the auxiliary normally open contact 9b is open, the third motor contactor 10 is not energized. Next, when the relay 5 is deenergized and the relay 6 is energized, the auxiliary normally open contact 6a is closed, and the second motor contactor 9 is energized through the auxiliary normally open contact 8b. By closing the contact 9a, the motor is self-retained, and the main contact 9c is closed to start the second motor 33. At that time, the auxiliary normally open contact 6b is also closed, but since the auxiliary normally open contact 5b is open, the third motor contactor 1
0 is not energized, the auxiliary normally open contact 10b is open, and the fourth motor contactor 11 is not energized. Similarly, the third motor 34 and the fourth motor 35 are sequentially activated by the flicker signal auxiliary normally open contacts 5a and 6b, respectively. When all the motors are started, in this case the fourth motor is the last motor, the auxiliary normally open contact 11b of the fourth motor contactor 11 is opened and the relay 3 and flicker relay 4 are deenergized, and as a result, the relay 5, relay 6
is deactivated. However, each of the first, second, third and fourth motors has an auxiliary normally open contact 8a, 9a, 10.
Since it is self-maintained by a and 11a, it continues to operate as it is.

In such a general control circuit, in order to arbitrarily bypass each motor, in Fig. 2,
For example, when bypassing the first motor, the contactor 8 for the first motor is not energized by the signal contact 16 that opens when the first motor is bypassed.
Do not operate the first motor. On the other hand, the dummy relay 12 is energized by the signal contact 20 which is closed by bypassing the first motor. This dummy relay 1
2, the auxiliary normally open contact 12a closes and holds itself, and the auxiliary normally open contact 12b of the next stage circuit
is closed. This auxiliary normally open contact 12b acts as a dummy for the auxiliary normally open contact 8b which has the role of a pre-stage interlock, and is used in the same way when bypassing other motors.

If you use the dummy relay in the same way as contactors 8, 9, 10, and 11 by inserting it into the next stage as a pre-stage interlock in this way, the main If the contactor is bypassed, the dummy relay will be energized one after another. Therefore, even if there is a motor that is bypassed and does not start, the dummy relay for that motor must be energized, so the motor will start up, including the time it takes to start the bypassed motor. Become.

Since the conventional integrated control device is configured as described above, the time required to start up the motors in order must include the time for starting up the bypassed motors in order. The drawback was that it took a long time to wait. In addition, when deenergizing relay 3 and flicker relay 4 in the starting circuit after the starting is completed, the auxiliary normally closed contact of the contact for the final starting motor is used to deenergize the relay 3 and flicker relay 4 of the starting circuit. But when bypassing,
Even though the motor without bypass has actually completed starting, the starting circuit is not reset until the final motor starting time has been reached, so if a failure occurs during that time and the motor stops, then the failure will occur. When the motor is restored, the motor starts immediately after the failure is recovered without having to press the start button again, which is dangerous.

This invention was made in order to eliminate the drawbacks of the conventional ones as described above, and it is possible to apply a bypass by connecting a latch type relay to the flicker bus of the starting circuit and inserting a bypass signal into the flicker bus. In this case, it is possible to start at the time interval during normal operation without bypassing the sequential start time, that is, at every flicker cycle time, so no extra waiting time is required for sequential start, and the last starting motor is not included. We provide a comprehensive control circuit that can always restart the motor by pressing the start button even if a failure occurs at any point and the motor stops, even if one motor immediately before it is bypassed. is intended to do.

An embodiment of the present invention will be described below with reference to the drawings. 1 in Figures 4, 5 and 6.
Components similar to those in FIGS. 2 and 3 are designated by the same reference numerals. 43, 44,
45 and 46 are latch relay closing coils for the first, second, third and fourth motors, 43a and 4, respectively;
3b, 44a and 44b, 45a and 45b and 4
6a, 46b and 46d are latch relay closing coils 43 for the first, second, third and fourth motors, respectively.
Auxiliary normally open contacts 44, 45 and 46, 46c an auxiliary normally closed contact for the fourth motor latch relay closing coil 46, and 47, 48, 49 and 50 latch relays for the first, second, third and fourth motors, respectively. Release coils of closing coils 43, 44, 45 and 46, 47b, 48b, 49b and 50b are auxiliary normally closed contacts of latch relay release coils 47, 48, 49 and 50 for the first, second, third and fourth motors, respectively. , 8a and 8b, 9a and 9b, 10a
and 10b and 11a are auxiliary normally open contacts of the first, second, third and fourth motor contacts 8, 9, 10 and 11, respectively, 16, 16', 17, 1
7', 18, 18' and 19 are the first, second and third
and signal contacts 20', 2 which are opened by bypass signals of the fourth motors 32, 33, 34 and 35.
1' and 22' are signal contacts which are closed by bypass signals of the first, second and third motors, respectively.

Next, the operation will be explained. When the start push button 1 is turned on, the relay 3 and the flicker relay 4 are energized, the auxiliary normally open contact 3a is closed, and the relay 3 and the flicker relay 4 are self-held. At the same time, auxiliary normally open contacts 3b and 4a are closed and latch relay closing coil 43 is energized. The other latch relay closing coil 45 is the latch relay closing coil 4
4 is not energized, the second motor contactor 9
is not energized and thus the auxiliary normally open contact 9b is not closed. When the latch relay closing coil 43 is energized and the auxiliary normally open contact 43a is closed, the first motor contactor 8 is energized and the contact 8a is closed and self-retained.
The next stage contact 8b is closed, and the main contact 8c is further closed, and the first motor 32 is started. Next, after the flicker period of the flicker relay 4, the auxiliary normally open contact 4a is opened and the auxiliary normally closed contact 4b is closed. 8b, the latch relay closing coil 44 is energized. At this time, since the latch relay closing coil 45 is not energized, the third motor contactor 10 is not energized, and therefore the auxiliary normally open contact 10 is not energized.
Since b is not closed, it is not energized yet. By energizing the latch relay closing coil 44, the auxiliary normally open contact 44a is closed, the second motor contactor 9 is energized, the main contact 9c is closed, and the second
When the motor 33 starts, the contact 9c closes to self-hold the contactor 9, and then the next stage contact 9b
Close. By repeating the flicker relay 4 alternately in the same manner, the latch relay closing coils 45 and 46 are sequentially energized and the third and fourth motors are activated. When all the motors are started, since the fourth motor 35 is the last one, the auxiliary normally closed contact 46c of the fourth motor operation command latch relay closing coil 46 opens.
Relay 3 and flicker relay 4 are deenergized.
At the same time, since the auxiliary normally open contact 46d is closed, each latch relay release coil 47, 48, 49
and 50 are energized and the auxiliary normally open contacts 43a, 4
4a, 45a and 46a are open. However, each of the first, second, third and fourth motors 32,3
3, 34 and 35 are auxiliary normally open contacts 8a and 9, respectively.
Since it is self-maintained by a, 10a, and 11a, it continues to operate as it is.

In order to arbitrarily bypass each motor in such a general control circuit, for example, the first motor 3
2, the contactor 8 for the first motor is not energized by means of the signal contact 16, which is opened by the bypass signal of the first motor, so that the first motor does not operate. On the other hand, in FIG. 4, a control power source is connected to a latch relay closing coil 44 for commanding the motor operation of the next stage by means of a signal contact 20' which is closed by a bypass signal of the first motor. In this manner, the contactor circuit attempting to bypass is cut off by the bypass signal, and its control power source is connected to the motor operation command latch closing coil circuit of the next stage. In addition, in FIG. 4, a signal contact 16' that opens with a bypass signal is connected to the line of the flicker signal auxiliary normally open contact 4a and a line of the flicker signal auxiliary normally open contact 4b, and a signal contact 20' that closes with the bypass signal is connected to the line of the flicker signal auxiliary normally open contact 4a. Place it in a sash rack. The procedure for inserting it is to insert it between the operation command latch input coil of the motor to be bypassed and the operation command latch input coil of the next stage motor.

In such a case, if the first motor is first bypassed, the flicker relay auxiliary normally open contact 4a is closed by the activation of the start push button 1, and the latch relay closing coil 43 for the first motor operation command is energized. Since the signal contact 16 is open, the first motor 32
is not energized. At the same time, the auxiliary normally open contact 4a,
The second motor operation command latch relay closing coil 44 is energized through the two signal contacts 20' which are closed by bypassing the first motor, and the second motor 33 is started.

Next, a case will be described in which only the second motor 33 is bypassed. When the flicker relay auxiliary normally open contact 4a, which is the first flicker signal, is closed, the first motor operation command latch relay closing coil 43 is energized and the first motor 32 starts operating. After the next flicker cycle, the auxiliary normally closed contact 4b closes and the first
The second motor operation command latch relay closing coil 44 is energized through the auxiliary contact 8b of the motor contactor 8. However, since the second motor contactor 9 is not energized by the signal contact 17 that opens when the second motor 33 is bypassed, the second motor does not start. At the same time, the third motor operation command latch relay closing coil 45 is energized from the auxiliary normally closed contact 4b through the two signal contacts 21' closed by the bypass of the second motor, and the third motor is started. That is, if only the second motor 33 is bypassed, when the second motor 33 should be started, the third
Since the third motor 34 is activated when the driving command for the motor 34 is received, there is no need to wait for the activation time of the second motor 33 as in the conventional case.

If you bypass the second and third motors,
First, the first flicker signal contact 4a closes, and the first motor operation command latch relay closing coil 43
is energized and the first motor 32 starts. When the auxiliary normally closed contact 4b closes at the next flicker cycle time,
Contactor 8 for the first motor via signal contact 16'
The second motor operation command latch relay closing coil 44 is energized through the auxiliary contact 8b, and at the same time, the third motor operation command latch relay closing coil 45 is energized through the signal contact 21' which is closed by the bypass of the second motor 33. is energized. However, because the second and third motors have bypass signal contacts 17 and 18 in their respective contactors 9 and 10, those contacts are not energized and the second and third motors 33 and 34 do not operate. At the same time, the third
2 signal contacts 22' closed by motor bypass.
As the fourth motor operation command latch relay closing coil 46 is energized, the fourth motor 35 starts operating since it is not bypassed. in this way,
Since the starting signal passes through the crossed signal line where the motor is bypassed and reaches the motor circuit that is not bypassed, there is no need to wait for the time required for starting the bypassed motor. Also the second and third
and if one or more motors including the last starting motor and immediately preceding it are bypassed, such as the fourth motor or the third and fourth motors, for example, when bypassing the second, third and fourth motors, the 1
After the motor is started, when the next flicker cycle time elapses, the second motor operation command latch relay closing coil 44 is energized, and at the same time, the third and fourth motor operation command latch relay closing coils 45 and 46 are also energized. The self-holding of the starting circuit is reset by opening the auxiliary normally closed contact 43c,
Further, by closing auxiliary normally open contact 46d, release coils 47, 48, 49 and 50 are energized and latch relays 43, 44, 45 and 46 are reset. That is, if you ignore the short time that the latch relays for the second, third, and fourth motors are energized, they will be reset almost at the same time as the latch relays for the second motor are turned on. After the last motor start
Since the reset is performed after one flicker cycle, even if a failure occurs at any time after startup is complete, restarting can be done by pressing startup button 1.
This is made possible by

Conventionally, the fourth motor latch relay was reset after waiting for the third and fourth motors to start, so starting was not completed until the first and second motors were started and the fourth latch relay was energized. It took a long time to reset even though it was installed. In other words, the startup completion reset is always performed in the last starting motor circuit when no bypass is used, so if a failure occurs during that time, the reset will not be applied, so the next restart will be due to failure recovery and the motor will start immediately. There were some inconveniences such as storage. When there are many motors and many motors including the last starting motor are bypassed, it takes a long time to reset. There's nothing like that.

In the above embodiment, the latch relays 43 to 50 are used in FIG. 4, but the relays used here may be of any self-holding type, for example, they may be DC relays. FIG. 7 shows an embodiment in which a DC relay is used, and FIG. 7, FIG. 5, and FIG. 6 can constitute one control circuit. Direct current relays 51, 52, 53 for first, second, third, and fourth motor operation commands are connected between DC control power supplies 40' and 41' via diodes 55, 56, 57, and 58 for preventing loop circuits, respectively. and 54 are connected, and these DC relays are self-maintained by auxiliary normally open contacts 51a, 52a, 53a and 54a, respectively. The DC relay also includes auxiliary normally open contacts 43a, 44a, 45a and 46a (FIG. 5), respectively, so that the operation of the circuit shown in FIG. 7 is similar to that in FIG. It will be understood that

As described above, according to the present invention, the bypass circuit is placed across the two flicker busbars, and the control power is supplied directly to the motor in the next stage by passing over the motor being bypassed. If there are many motors, the startup will be completed quickly depending on the number of motors that are actually started, and as a result, the startup circuit will be reset quickly and reliably, resulting in a highly safe restart. It has the effect of giving you something.

[Brief explanation of the drawing]

1, 2, and 3 are circuit diagrams showing conventional general control circuits, and FIGS. 4, 5, and 6 are circuit diagrams showing general control circuits according to an embodiment of the present invention. FIG. 7 is a circuit diagram showing another embodiment of the circuit portion shown in FIG. 4. 1 is a control push button, 2 is a stop push button, 3 is a relay, 4
is a flicker relay, 8, 9, 10 and 11 are contactors, 16, 17, 18 and 19 are first signal contacts, 16', 17', 18', 20', 21'
and 22' are second signal contacts, 32, 33, 3
4 and 35 are motors, 40 and 41 are DC or AC control power supplies, 42 is a main power supply, 43, 44,
45 and 46 are latch relay closing coils (relays), 47, 48, 49 and 50 are latch relay release coils, 40' and 41' are DC control power supplies, and 51, 52, 53 and 54 are DC relays (relays).

Claims (1)

[Claims] 1. In order to sequentially start a plurality of motors, 2.
a flicker type pulse circuit including a flicker signal bus of the system; and a plurality of contactors provided corresponding to each of the motors and sequentially energized every flicker period of the flicker type pulse circuit to sequentially start the motors. and a group of self-holding contacts provided in series with each of these contactors to self-hold the energized contactor; a first signal contact group for bypass, the contacts of which open in accordance with a motor bypass signal;
A plurality of relays are connected alternately to the flicker signal lines of the system, and a plurality of relays are provided on each of the flicker signal bus lines of the two systems in correspondence between the relays of the plurality of relays, and each of the above-mentioned a second signal contact group for bypass whose contacts open in accordance with a bypass signal of the motor; and a sash between the flicker signal busbars of the two systems corresponding to each relay of the plurality of relays; A third bypass contact is provided in a cliff shape and closes in accordance with the bypass signal of each of the motors.
a group of signal contacts, and a reset contact for resetting the flicker pulse circuit when a relay corresponding to a motor provided at the last stage of the plurality of motors is energized, The second and third signal contact groups are configured to energize the next relay at the same time as the relay corresponding to the bypassed motor, so that the relay corresponding to the last motor to be activated in sequence 1. An overall control circuit characterized in that, at the same time that the flip-type pulse circuit is energized, the flip-type pulse circuit is reset by the reset contact.