JPS59223816A - Data recorder - Google Patents

Abstract

PURPOSE:To hold a waveform recorded in a fault mode and to attain the writing of data even in an operation mode by writing the data given from the 1st memory to the 2nd memory connected in series to the 1st memory via a data transfer curcuit which is controlled by the signal supplied from outside. CONSTITUTION:The main circuit current voltage of a self-excited inverter 1 detected by a detector 11 always undergoes A/D conversion 3, and the digital signal is recoded to a memory 6. The writing to the memory 6 is discontinued when the inverter 1 has a fault and is stopped. Then the signal is supplied to a data transfer circuit 13 from a contact 15 after the writing is stopped and before the operation of a recorder is restarted. Thus the circuit 13 transfers the recorded data to a memory 14 from the memory 6. The data recorded to the memory 14 undergoes D/A conversion 9 and is delivered to a photocoder to be recorded there. The contents of the memory 14 are held as they are and used for diagnosis of faults with the memory 6 just rewritten even through the operation of the recorder is restarted.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention detects the current or voltage of each part of a power conversion device (2) and stores the detected data in a writable memory (2).
2.Writing data recording device (2 related).

[Technical background of the invention and its problems]

Uninterruptible power supplies used as power sources for socially important loads such as banks and airports are required not only to be highly reliable but also to have short failure recovery times. However, the self-excited inverter, which is the main part of the uninterruptible power source, will fail and stop if the firing order of the Zyristors is out of order or if a load current higher than expected flows. Furthermore, if the parts in the protection circuit deteriorate and the protection circuit is activated by mistake, the load current is not abnormal (the dual self-excited inverter stops).

If the component has completely deteriorated, it is possible to discover a defect in the protection circuit through an investigation after the failure has stopped, but if it has been caused by incomplete deterioration, the superficial defect of the component may return after the failure has stopped. , it may not be possible to detect defects.

What is difficult is that some load abnormalities can occur, for example, at the same time as a short circuit occurs. There is.

For this reason, it may be difficult to determine whether there is a cause of failure within the protection circuit or whether an instantaneous short circuit has occurred on the load side, and the cause may ultimately become unknown.

In such a case, connect the waveform recording device to the inverter and wait for the failure to occur again, but it may take time and time to discover the true cause of the failure and eliminate it.

If the state of each part before and after a failure can be recorded, even if the failure is not reproducible, the location of the failure can be determined by analyzing the data recorded at the time of the first failure.

In recent years, the use of microcomputers in the deodorant circuits of power converters has been progressing. Microcomputerization of control circuits has made it possible to record the status of each part before and after a failure occurs.

A conventional microcontroller will be explained with reference to FIG.

1 is a self-excited inverter, 2 is a load, 3 is an A/D converter that converts an analog quantity into a digital signal, and a detector 11
The main circuit current/voltage detected by this is digitized. 4 is a processor circuit which is the main control section of the microcomputer section, and 5 is a read-only memory in which programs are stored. A writable memory 6 serves as a writable memory necessary for normal computer operation and as a writable memory for storing main circuit current/voltage waveforms. 7 is a digital output circuit which sends a gate cutoff command to the gate circuit 8 in response to a command from the processor circuit 4; A hardware comparator circuit 10 determines the level of the main circuit current and voltage, and sends a gate cutoff command to the gate circuit 8 based on the result.

The gate circuit 8 normally operates as a switching element of the inverter 1.

A gate signal for controlling non-operation is sent out, but when a gate cutoff command is sent out from the digital output circuit 7 or the comparator circuit 10, the gate signal is cut off.

The operation of recording the status of each part before and after a failure occurs (I will explain it in two steps.

The main circuit current/voltage detected by the detector 11 is normally converted from analog to digital by the A/D converter 3 and sequentially written into the writable memory 6.

When the inverter 1 fails and stops, writing to the writable memory 6 is stopped. The data recorded in the writable memory 6 is converted from digital to analog by the D/A converter 9, and is output to the photocoder 12 and recorded. Fault diagnosis can be performed based on the recorded data.

Then, when the device is restarted, writing of main circuit current/voltage data is resumed. However, if you quickly recover without outputting the waveforms recorded at the time of failure and restart the device, the recorded waveforms will be rewritten and the recorded data will be erased (Second. Therefore, the recorded waveforms will remain. There is a structure in which a lock switch is installed to prohibit data from being rewritten, but this has the disadvantage that it becomes impossible to record data during subsequent driving.

[Purpose of the invention]

SUMMARY OF THE INVENTION It is an object of the present invention to overcome the disadvantages of the conventional JR and to provide a data recording device capable of storing waveforms recorded at the time of failure and writing data during operation.

[Summary of the invention]

The present invention is a data recording device comprising two sets of writable memories connected in series via a data transfer circuit whose operation can be controlled by an external signal.

That is, the present invention detects the current or voltage of each part of the power conversion device, converts the detected value from analog to digital, and stores the digitized data in the writable memory in the area of serial section 1. In a data recording device that uses a microprocessor sun that can output the written data by stopping writing when the power converter stops due to a failure, It is a data storage device for a power converter device that is characterized by data transfer (2) when the device is restored (1 + ゛ (1) for data storage while updating the data in the programmable memory (2). It is also possible to provide a data recording device characterized by being able to output the data transferred at the time of failure.

[Embodiments of the invention]

FIG. 2 shows an embodiment of the present invention. The names of parts given the same numbers as in FIG. 1 are the same as in FIG. The difference in Figure 2 from Figure 1 is that 13 is a data transfer circuit;
4 is a write-capable memory.

The writing of data to the programmable memory 6 during operation of the device and the lid stoppage in the event of a failure are the same as in FIG.

When a contact signal is input to the data transfer circuit 13 before restarting the operation of the middle school 1, the data transfer circuit 13 transfers the recorded data from the writable memory 6 to the writable memory 14. (2) The data recorded in the attachable memory 14 is converted from digital to analog by the D/A converter 9, and then transferred to the photocoder 1.
2 and is recorded. Further, even if the operation of the device is restarted, the programmable memory 6 is only rewritten, and the contents of the programmable memory 14 remain unchanged. A push button switch may be used as the contact signal. A dedicated push button switch for data storage may be provided, or it may also be used as a switch for restoring the display. In addition to using push button switches, there is also a method of automatically transferring data based on a failure signal.

FIG. 3 shows a state in which waveform data recorded at the time of a failure is transferred from the writable memory 6 to the writable memory 14 and is stored in the writable memory 14 (2).

〔Effect of the invention〕

According to the present invention (2), the operation of the equipment can be restarted while saving the waveform data recorded at the time of failure and stoppage, and the data of the main circuit current and voltage during operation can be reviewed.Also, while the equipment is in operation (2) You can view the recorded waveform data on a photocoder.

In other words, in the event of a failure (e.g., when there is no photocoder that can output the recorded waveform), the device is a very important power source for the load, so it is possible to quickly recover and restart the device without outputting the recorded waveform. Since the waveforms recorded at the time of a failure are saved, the recorded waveforms can be outputted after equipment such as a photocoder is available, and can be useful for failure diagnosis.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a conventional data recording device, FIG. 2 is a block diagram showing an embodiment of the present invention, and FIG. 3 is an explanatory diagram showing the storage state of a writable memory. 1...Self-excited inverter 2...Load 3...A/
D converter 4... Processor circuit 5... Read-on memory 6... Writable memory 7... Digital output circuit 8... Gate circuit 9... D/A converter 10... Comparator Circuit 11...
Detection Z< 12... Photocoder 13.
...Data transfer circuit J4...Memory agent that can be worn out Patent attorney Noriyuki Chika (and one other person) Fig. 1 Fig. 2

Claims (1)

[Claims] A data recording device comprising two sets of writable memories connected in series via a data transfer circuit whose operation can be controlled by external signals.