JPH056546Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial application field> The present invention relates to a device for diagnosing the operating status and detecting abnormalities of equipment and devices equipped with electrically driven equipment, and in particular, it is a device that uses power supply lines as they are. The present invention relates to a device for diagnosing the operating status and detecting an abnormality of equipment, devices, etc. equipped with electrically driven equipment that can be detected near the power supply terminal.

<Prior art> Equipment/equipment with one or more electric drive devices
In order to stably operate equipment or equipment, it is necessary to maintain the load of the electrically driven equipment at a constant normal value.

To do this, it is necessary to diagnose and detect whether the load on each drive device is abnormal or not, and if it is, remove the cause of the abnormal load and keep the load on the drive device within a certain range. is required.

Conventionally, methods for detecting this abnormal load include a method of installing a detector close to each electrically driven device and measuring changes in the current value of the circuit that includes the device, and a method of installing a dedicated detection device separate from the power supply line. There is a method that can prompt abnormal value signals by installing wiring and constantly observing with a central detector.

However, in the case of the former, when there are many devices, or when other devices are built-in,
The drawback is that it is often complicated and difficult to perform the same detection in close proximity to the same device.

In addition, in the latter case, when a large number of electrical devices are each equipped with dedicated detection wiring and abnormality detection is performed separately, the wiring must be of high quality with as little noise as possible, which is expensive. The disadvantage is that not only is the wiring complicated, but also the operation is complicated.

Therefore, as a means to eliminate these drawbacks,
Detection devices and the like have been proposed in which a load range (upper limit and lower limit) is set for a circuit including each electrical device. However, since this method uses the power supply line as is, if voltage is applied to the line, the noise current and many capacitive and inductive loads connected to the circuit will adversely affect the circuit. give,
There is a problem in that it is difficult to ensure accuracy in sending and receiving detection signals.

<Problems to be solved by the invention> In view of these shortcomings of the conventional technology, the main purpose of the present invention is to use the power supply line as is, eliminate the negative effects of noise and capacitive loads, and provide accurate To provide a device for diagnosing the operating status and detecting abnormalities of each electrically driven device, such as equipment and equipment equipped with the electrically driven device, which can send and receive detection signals and can be easily wired and operated. It is in.

<Means for Solving the Problems> According to the present invention, this purpose is to provide a system which is driven by one or more electric drive devices connected to a power supply circuit through a power switch. A storage circuit that diagnoses the operating status of a group of equipment and equipment based on the current value flowing through each electrically driven device, detects the presence or absence of an abnormality in each drive system, and its degree, and stores it. and a diagnostic circuit that checks each drive system by reading the diagnostic information stored in the memory circuit from the power switch side using the power supply line, and a diagnostic circuit that reads out the diagnostic information and trips the diagnostic memory system from the power switch side. This is achieved by providing a device for diagnosing the operating state and detecting abnormalities of equipment and devices equipped with electrically driven equipment, characterized by being equipped with a reset circuit that performs a reset circuit.

<Function> In this way, by using the power supply line as it is and making it a device for diagnosing the operating state and detecting abnormal loads, which is equipped with a specific memory circuit, diagnostic circuit, and reset circuit, the power switch can be used as is. Since it is possible to diagnose equipment and devices and detect abnormal load conditions in the open, non-applied state, it is possible to eliminate negative factors such as noise and capacitive load when sending and receiving detection signals, and it is possible to supply power with the memory circuit connected. The memory will not be affected even if the data is transferred, and detection signals can be sent and received accurately.

<Embodiments> The present invention will now be described in detail with reference to specific embodiments with reference to the accompanying drawings.

FIG. 1 shows a first embodiment of the present invention, in which the memory circuit is equipped with a stable relay, and the reset circuit, which is a means for tripping the memory of the memory circuit, is equipped with a manual reset switch. .

A power supply line 3 is branched from the main power supply line 1 via a power supply switch 2 for power supply. A large number of electrically driven devices 4 are connected to the feeder line 3 via electromagnetic switches 5 for electrically driven devices, and in order to detect the load state of the circuit equipped with the devices 4, it is necessary to is equipped with a device 6 for diagnosing operating conditions and detecting abnormal loads.

A device 6 for diagnosing each operating state and detecting an abnormal load is provided for each circuit provided with each electric drive device 4.

Next, the equipment/equipment/equipment/equipment/equipment/equipment/equipment/equipment/equipment/equipment/equipment/etc.
One of the devices 6 for diagnosing the operating state of devices and detecting abnormal loads will be explained.

The device 6 for diagnosing the operating state and detecting an abnormal load detects the operating state of each electric drive device 4 for each circuit equipped with each electric drive device 4 based on the current value flowing through each electric drive device 4. A memory circuit 7 that diagnoses, detects and stores the presence or absence of abnormality in each drive system and its degree.
and a diagnostic circuit 8 which is connected to the power supply line 3 and reads the diagnostic information stored in the memory circuit 7 on the switch side using the power supply line 3 to check each drive system, and reads out the diagnostic information. A reset circuit 9 is provided for tripping the diagnostic storage system from the power switch side.

The memory circuit 7 is connected to each circuit provided with each of the electric drive devices 4, and is set with a current value during normal load of the circuit provided with the device 4, and sets an upper or lower limit of the set current value. The current transformer 11, which becomes energized only when the current of the disconnected and abnormal load flows for a predetermined period of time, is activated according to the drive load level only when the circuit equipped with the device 4 becomes an abnormal load. An overload side stable relay 12a and a light load side stable relay 12b which operate in electrical continuity with the transformer 11 are connected, and the relays 12a, 1
Bandpass filters 13a and 13b on the overload side and light load side store the abnormal load state of the system equipped with the device 4 and the drive system number based on the frequency unique to equipment and equipment only while the device 2b is operating. are connected to the power supply line 3, respectively.

The stable relays 12a, 12b are connected to the current transformer 11, and have an overload side that is energized by being electrically connected to the transformer 11, which is energized only when there is an abnormal load in the circuit including each electric drive device 4. The excitation coils 14a, 14b on the light load side are connected to the feeder line 3 and the bandpass filters 13a, 13b, respectively, and the coils 14a, 14
It consists of electromagnetic switches 15a, 15b for relays on the overload side and light load side which are closed by the excitation of b, and reset coils 16a, 16b on the overload side and light load side connected to the reset circuit 9.

The diagnostic circuit 8 includes a detector 20 that is connected to the load side of the power supply switch 2 via a detection power switch 10 and that sends and receives a detection signal.

On the other hand, the reset circuit 9 is connected to each of the reset coils 16a, 16b and the power supply line 3, and is also connected to the reset coils 16a, 16b.
Manual reset overload side and light load side reset switches 2 which open the electromagnetic switches 15a and 15b for the relays and trip the memories of the bandpass filters 13a and 13b by operating b.
1a, 21b and the same reset coils 16a, 16
Electric resistors 22a, 2 on the overload side and light load side are placed on b.
rectifiers 23 on the overload side and the light load side, which are connected to the power supply line 3 via the power line 2b;
It consists of a and 23b.

Next, its effect will be explained.

First, in a circuit equipped with each electric drive device 4 that is energized by closing each power switch 2 and the electromagnetic switch 5 for electric drive devices, the range of current values (upper and lower limits) under normal load of the circuit. The current transformer 11 that has been set determines whether the load current is within the set current range, in other words, whether or not the circuit is a normal load. That is, when the load current is within the set current range, the circuit is in a normal load state, so the transformer 11 is not energized and the memory circuit 7 is not operated.

On the other hand, when the load current is outside the upper and lower limits of the set current for a predetermined period of time, the circuit is in an abnormal load state, so the transformer 11 is energized and the memory circuit 7 is activated.

That is, when the transformer 11 is energized, one of the excitation coils 14a and 14b is electrically connected to the transformer 11 depending on whether the current value falls outside the upper or lower limit of the set current value. And the same coil 1
One of the relay electromagnetic switches 15a and 15b is energized.
As a result, one of the bandpass filters 13a, 13b connected to one of the switches 15a, 15b becomes conductive, and the relays 12a, 12b
Only while the electric drive device 4 is operating, the abnormal load condition of the system including the electric drive device 4 and the drive system number are stored based on the frequency unique to the circuit.

At this time, even if the excitation coils 14a, 14b are de-energized, that is, even if the power supply switch 2 for power supply is opened, one of the corresponding electromagnetic switches 15a, 15b for the relay is closed, so the above-mentioned The storage of the abnormal load state of the system including the electric drive equipment 4 and the drive system number continues.

Next, when diagnosing the operating status of equipment and devices equipped with each electric drive device 4 and detecting abnormal load conditions, first open the power supply switch and check for any negative effects such as noise or load. After setting it to a state where it is not affected, if a variable frequency detection signal current is sent from the detector 20 of the diagnostic circuit 8, the frequency absorbed by the corresponding bandpass filters 13a and 13b will be detected, and the abnormality will be detected. A circuit with a driving device 4 can be detected.

By eliminating the abnormality in the device 4, etc., the circuit can be returned to a normal load state.

Next, after reading the diagnostic information, reset switches 21a and 21b on the overload side or light load side
By closing the reset coils 16a,
By operating one of the relay electromagnetic switches 15a and 15b, the memory of one of the bandpass filters 13a and 13b is tripped. That is, the diagnostic memory system is reset from the power switch side.

FIG. 2 shows a second embodiment of the present invention, in which a capacitor having a charging capacity is used instead of the manual reset circuit 9 equipped with the reset switches 21a, 21b and reset coils 16a, 16b of the first embodiment. The device is equipped with an automatic reset circuit 40 including a power storage device 41 such as a battery or a battery.

That is, the storage circuit 30 is connected to the current transformer 11 and the bandpass filters 13a, 13b, and the transformer 11 is connected only when the circuit including the electric drive device 4 is in an abnormal load state.
The overload side and light load side relays 31a and 31b are provided, which operate in electrical continuity with the overload side and light load side. And the same relay 3
1a and 31b are the excitation coils 14a and 14b.
and relay electromagnetic switches 15a, 15b, and does not have the reset coils 16a, 16b provided in the first embodiment.

On the other hand, the reset circuit 40 resets the excitation coil 1
4a, 14b and the current transformer 11 are connected to a capacitor (in this embodiment, a capacitor) 41 having a charging capacity such as a capacitor or battery, and
A plurality of (four in this embodiment) reset circuit rectifiers 42 are bridge-connected to both ends of the capacitor 41 and to both ends of each electric drive device 4.

Next, its effect will be explained.

First, when the electric drive device 4 is in an operating state, the power storage device 41 is in a charging state, and a certain amount of power supply capacity is maintained in the power storage device 41.

Even if the power supply switch 2 is opened to detect an abnormal load in a circuit equipped with each electrically driven device 4, the memories of the bandpass filters 13a and 13b are not tripped, and the memory of the capacitor 41 is not tripped. The power is maintained as long as the power is equal to or higher than a predetermined value.

In the above case, the current transformer 11 connects either one of the excitation coils 14a, 14b and the capacitor 41 when there is an abnormal load on equipment, equipment, etc. equipped with each of the electrically driven devices. As a result of this conduction, one of the electromagnetic switches 15a and 15b for the relay is closed, thereby establishing conduction with one of the bandpass filters 13a and 13b, and one of the filters 13a and 13b connects the electric drive device 4. The abnormal load condition of the system and the unique frequency of the circuit are used to store the drive system number.

<Effects of the invention> As described above, according to the present invention, since the device is used for diagnosing the operating status and detecting abnormalities of equipment and devices equipped with electrically driven equipment that utilizes power supply lines as they are, it is not necessary to There is no need to provide a detector close to the detector or use dedicated high-quality detection wiring, which has the advantage of simplifying the wiring and reducing the cost. In addition, since it is equipped with a memory circuit, a diagnostic circuit, and a reset circuit, diagnosis and detection measurements can be performed while the power supply switch is open.
By eliminating adverse factors such as noise and capacitive load, it is possible to ensure accuracy in the transmission and reception of diagnostic and detection signals.

Furthermore, even if power is supplied while the abnormal load state and its drive system number are stored in the bandpass filter, power consumption is low and heat generation is small, so power supply is not hindered.

In addition, if the reset circuit is equipped with a capacitor with charging capacity, manual reset is not necessary.
Since it returns automatically, it has the great effect of making the operation simple and reliable.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram of a first embodiment of the present invention.
FIG. 2 is a circuit diagram of a second embodiment of the present invention. 1...Main line for power supply, 2...Power supply switch for power supply,
3... Power supply line, 4... Electrically driven equipment, 5... Electromagnetic switch for electrically driven equipment, 6... Device for diagnosing operating conditions and detecting abnormal loads, 7... Memory circuit, 8
...Diagnostic circuit, 9...Reset circuit, 10...Detection power switch, 11...Current transformer, 12a...
...Overload side stable relay, 12b...Light load side stable relay, 13a...Overload side bandpass filter, 13b...Light load side bandpass filter, 14a...Overload side excitation coil, 14b
... Light load side excitation coil, 15a ... Electromagnetic switch for overload side relay, 15b ... Electromagnetic switch for light load side relay, 16a ... Overload side reset coil, 16b ... Light load side reset coil, 20...
...Detector, 21a...Overload side reset switch,
21b...Light load side reset switch, 22a...
Overload side electrical resistor, 22b... Light load side electrical resistor, 23a... Overload side rectifier, 23b... Light load side rectifier, 30... Memory circuit, 31a... Overload side relay, 31b... Light load side relay, 40
... Reset circuit, 41 ... Condenser, 42 ... Rectifier for reset circuit.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) The operating status of equipment and devices that are driven and operated by one or more electrically driven devices connected to the power supply circuit through a power supply switch. A memory circuit that diagnoses each electric drive device based on the current value flowing through it, detects the presence or absence of abnormality in each drive system, and its degree, and stores the diagnosis information. The present invention is characterized by comprising a diagnostic circuit that reads the information on the switch side using the power supply line and checks each drive system, and a reset circuit that trips the diagnostic storage system from the power switch side after reading out the diagnostic information. A device for diagnosing the operating status and detecting abnormalities of equipment and devices equipped with electrically driven equipment. (2) The above storage circuit includes a current transformer that is connected to each electrically driven device and becomes energized only when the abnormal load of the circuit equipped with the device lasts for a predetermined period of time, and a current transformer that is connected to the transformer. and a relay that operates by being connected to the transformer according to the drive system load level of each electric drive device, and a relay that is connected to the power supply line and operates each electric drive device while the relay is operating. Utility model registration equipment, equipment, etc. equipped with the electric drive equipment according to claim 1, characterized in that it is equipped with a bandpass filter that stores the abnormal load state of the equipped system and its drive system number. A device for diagnosing operating conditions and detecting abnormalities. (3) The electric circuit according to claim 1 of the utility model registration claim, characterized in that the reset circuit is provided with a reset switch that is connected to the relay and the power supply line and that trips the relay. A device for diagnosing the operating status and detecting abnormalities of equipment and devices equipped with drive equipment. (4) The relay has an excitation coil that is connected to the current transformer and is energized only when conducting with the transformer, and an excitation coil that is connected to the bandpass filter and the power supply line and is energized by the coil. An apparatus for diagnosing the operating state and detecting an abnormality of equipment, devices, etc. equipped with electrically driven equipment according to claim 2 of the utility model registration claim, characterized in that the apparatus is equipped with an electromagnetic switch that opens when the switch is opened. (5) The reset circuit is equipped with a power storage such as a capacitor or battery that is connected to the relay and the power supply line, holds the record of the bandpass filter, and has charging capability. A device for diagnosing the operating state and detecting abnormalities of equipment, equipment, etc. equipped with the electrically driven equipment according to claim 1.