JPS62213519A - Source controller - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Object of the Invention (Industrial Application Field) This invention is provided between a first power source and a second power source,
The present invention relates to a power supply control device that controls conduction or non-conduction between a first power source and a second power source using an external control signal.

(Prior art) Generally, when controlling the power on/off of this device while the system's power switch is on, it is usually turned on/off using a separate alternate switch, but momentary switches When used in combination with a latching relay, on/off operations can be repeated. In addition, an alternate switch is a switch whose state does not change after operation until the next operation, and a momentary switch is ON only when it is operated (pressed), and other than that (
This is a switch that turns off when released. However, when a latching relay is used as described above, the initial conditions of this relay are not determined, so even if the system's power switch is on, it may not be possible to turn on the power to the device. For this reason, when a momentary power outage occurs (the negative power supply is instantly turned off), it may not be possible to correctly reproduce the switching state immediately before the momentary power outage occurs. Additionally, latching relays have problems such as vibration resistance, and may malfunction when used in equipment that generates large vibrations.

(Intermediate Points to be Solved by the Invention) This invention improves the conventional problem that malfunctions occur when the next-side power supply is momentarily interrupted or when vibrations occur. It is an object of the present invention to provide a power supply control device that can reliably reproduce the previous switching state.

[Structure of the Invention] (Means for Solving the Problems) That is, the power supply control device according to the present invention is provided between a first power supply and a second power supply, and is configured to control the power supply by an external control signal. 1. A first switching device that controls conduction or non-conduction between the second power source, a second switching device that selectively switches conduction or non-conduction, and a conductive state only during operation and a non-conductive state other than during operation. When a third switching device is connected to a third switching device and the second switching device is in a conductive state, the first switching device is made conductive or non-conductive each time the third switching device is operated. The present invention is characterized by comprising a control circuit that alternately outputs signals and supplies them to the first switch as the control signal.

(Function) In other words, the power supply control device with the above configuration provides a first switch between the first power supply and the second power supply, and turns the first switch on and off by an external control signal. Let me be the first
．． It controls conduction or non-conduction between the second power supply,
A second switch that is selectively switched between conduction and non-conduction, and a third switch that is made conductive only during operation and non-conductive at times other than operation are connected to the control circuit.
When the switching device is in a conductive state, each time the third switching device is operated, the control circuit alternately outputs a signal that makes the first switching device conductive or non-conductive, and this output signal is supplied to the first switching device as a control signal.

(Embodiment) Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

The drawing shows its configuration. In the drawing, 11 is the first power source as the primary power source, and 12 is the second power source as the device side power source.
It is the power source. The first and second power supplies are set to be in a conductive or non-conductive state by a first switch 13 comprising a power on/off relay.

14 is a control circuit, and this control circuit 14 includes a second switch 15 for turning the entire system on and off;
A third switch IB is connected to control the second power supply 12 on and off via the first switch 13 when the switch 15 is in the on state. An alternate switch is used for the second switch 15, and a momentary switch is used for the third switch 16.

The control circuit 14 includes a relay 141, a nonvolatile memory (R
OM) 142 , an address designation circuit 143 , and a clear circuit 144 . The relay 141 is connected to the first power supply lt'7! When the second switching device 15 is set to the on state with l There is. The nonvolatile memory 142 stores on/off data in advance, and when the second switch 15 is turned on, the stored on/off data is stored at the address specified by the address from the address designation circuit 143. It is read out and sent to the first switching device 13 as a control signal. The addressing circuit 143 is connected to the third switch 16
Each time the address data is operated, the address data is sequentially switched and specified and sent to the nonvolatile memory 142. The clear circuit 144 has a CR time constant circuit, and the relay 14
1 to initialize the addressing circuit 143 when the drive current is supplied for a period longer than the time determined by the time constant circuit.

The operation of the above configuration will be explained below.

First, the nonvolatile memory 142 stores in advance data that always turns on the first switch 13 when the address data is an initial value. Then, when the address data is sequentially designated to be switched, the data is stored so that the first switch 13 is switched from on to off and from off to on. In this state, it is assumed that m 1 (7) fflgLl is on, and when the second switch 15 is turned on, 1
When the rule 141 is activated, power is supplied to the nonvolatile memory 1J142, the address designation circuit 143, and the clear circuit 144. At this time, the address designation circuit 143 is initialized by the clear circuit 144, so the address data is initialized. It is sent as a value to the nonvolatile memory 142. Therefore, the nonvolatile memory 143 outputs data that turns on the first switch 18.

Next, when the third switch 1B is operated once while the first switch 13 is on, the data value of the addressing circuit 143 changes, and the output of the memory 142 is transferred to the first switch 13.
The data is switched to turn off. The output of this memory 142 does not change until the third switch 1B is operated next time.

Furthermore, when the third switch 1B is operated a second time, the output data of the addressing circuit 143 is switched, and the output of the memory 142 is switched to data that turns on the first switch 13. The output of this memory 142 is then sent to the third switch 1.
It does not change until B is operated. Similarly, since the address data changes every time the third switch 16 is operated, the memory 142 outputs data for sequentially switching the lead 1 switch 13 from on to off and from off to on. Therefore, when the second switch 15 is in the on state,
Depending on the operation of the third switching device 16, the first and second power sources can be sequentially switched into a conductive state and a non-conductive state.

In this way, the momentary switch of the third switch 16 can be used as a switch that functions similarly to an alternate switch.

Here, the first power supply 11 is in the on state, and the first switch 13 is in the on state.
When the first power supply 11 is in the on state, if a momentary interruption occurs in the first power supply 11, the relay 141 is turned off at that moment, and the control circuit 14 is turned off.
operation stops. Therefore, the first switch 13 is turned off, and the second power supply 12 is also turned off. Next, the first
When the power supply ■1 returns to the on state, the relay 141 is turned on again.
is activated, and the control circuit 14 enters the driving state. At this time,
If the instantaneous interruption that occurs in the first power supply 11 is within the time determined by the time constant circuit of the clear circuit 144, this clear circuit 1
44 does not initialize the addressing circuit 143. At this time, since the address content for the memory 142 remains unchanged from the value immediately before the momentary interruption, the first switch 13 is turned on again, and the second power supply 12 returns to the same on state as immediately before the momentary interruption. This also applies when the first power source 11 is on and the second power source 12 is off.
Even if a momentary interruption occurs in 1, the state immediately before the momentary interruption can be reliably reproduced.

However, when the off state is longer than a momentary interruption, that is, when the second switching device 15, which is the system power switch, is turned off and the second power supply 12 is set to the off state, the relay 141
As a result, the time during which the control circuit 14 is in an operation-stopped state becomes longer than the set time of the clear circuit 144. For this reason, the second
When the switch 15 is turned on and the second power source 5 is set to the on state again, the address value for the memory 142 is returned to the initial value, so the first switch 13 is set to the on state.

Therefore, since the power supply control device having the above configuration defines the initial conditions when the power is turned on, the second power supply can be turned on or off when the first power supply is turned on. Even if a momentary power outage occurs in the first power supply,
Since the state immediately before the instantaneous power outage is maintained, it can be correctly reproduced when the first power supply is restored. Furthermore, since no latching relay is used, there are no problems with vibration resistance or the like.

Incidentally, the present invention leads to miniaturization of the device and has excellent vibration resistance, and is therefore very effective for on-board equipment such as aircraft.

[Effects of the Invention] As detailed above, according to the present invention, it is possible to provide a power supply control device that can reliably reproduce the switching state immediately before the occurrence of instantaneous power failure or vibration even when a momentary power failure occurs or vibration occurs. can.

[Brief explanation of drawings]

The drawing is a block circuit configuration diagram showing an embodiment of a power supply control device according to the present invention. 11...first power supply, 12...second power supply, 13.
...First switch, 14... Control circuit, 141...
Relay, 142...Nonvolatile memory, 143...Address designation circuit, 144...Clear circuit, 15-0.
Second switch, 16...Third switch.

Claims (1)

[Claims] A first switch that is provided between the first power source and the second power source and controls conduction or non-conduction between the first and second power sources by an external control signal, and conduction or non-conduction is selected. In the case where a second switch that is switched automatically and a third switch that is made conductive only during operation and non-conductive when not operated are connected, and the second switch is made conductive. and control means that alternately outputs a signal that makes the first switching device conductive or non-conductive each time the third switching device is operated, and supplies the signal to the first switching device as the control signal. A power control device featuring: