JPS6392273A - Inverter apparatus for deep sea submersible - Google Patents

Abstract

PURPOSE:To facilitate analysis of failure, by letting a storage means store the abnormal condition, etc. of an inverter apparatus and each detection signal of voltage, current, etc. in failure likewise in a definite period. CONSTITUTION:Together with a transistor 1 of an inverter circuit, an inverter apparatus is composed of a DC control power circuit 11, each detection circuit 12-15 of DC voltage and current, a high frequency modulation circuit 17, a a voltage correction circuit 18, a pattern generation circuit 19, a failure detection circuit 20, a start-and stop circuit 21, an inclination signal generation circuit 22, etc. and drives a motor 27 serving as a load. At this moment provided are an analogue/digital converter 28 to convert the detection output of each detection circuit 12-15 into digital, a microcomputer 29 to judge and process the failure, etc. of the circuit from this output, a RAM 30 to store the detection output a supercapacitor 31 to holed the data content in a definite time period and a ROM 32. After the control power is lost, the data can be held with its capacitance.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] This invention relates to an inverter device used as a power source for propulsion and motive motors in deep-sea submersible vessels, communication equipment, and the like.

[Conventional technology]

Figure 2 is a block diagram of a conventional inverter device, as shown in Figure 4, Vol. 54, No. 3, Page 255 of the Mitsubishi Electric Technical Report, published on March 1, 1980. In the figure, 1 is the inverter. The transistor in the circuit, 2 is also a diode, and 3 is a current transformer (hereinafter referred to as C) for the transistor 10 base drive circuit.
T5), 4 is a DC reactor, 5 is a DC voltage detection resistor, 6 is an electrolytic capacitor, 7 is a current limiting reactor,
8 is a shunt, 9 is a transformer (hereinafter referred to as PT 5), 10 is a CT, 11 is a DC control power supply circuit, 12 is a DC voltage detection circuit, 13 is a DC current detection circuit, 14 is an AC voltage detection circuit, 15 is an alternating current detection circuit, 16 is a base drive circuit, 1
7 is a high frequency modulation circuit, 18 is a voltage correction circuit, 19 is a pattern generation circuit, 20 is a failure detection circuit, 21 is a start/stop circuit, 22 is a slope signal generation circuit, and 23 is a battery externally connected to the device as its power source. , 24 is a no-fuse breaker for switching on and off the power supply, 25 is an electromagnetic contactor for initial charging of an electrolytic capacitor, 26 is a resistor for initial charging of an electrolytic capacitor, 27
is an electric motor connected to the outside of the device as its load.

Next, the operation will be explained. First, the electromagnetic contactor 25 for initial charging is turned on, and the electrolytic capacitor 6 is connected to the charging resistor 26.
After charging and establishing a DC voltage, the no-fuse breaker 24 for switching on and off the power supply is turned on to complete preparation for operation. At this stage, each control circuit is supplied with control power by the DC control power supply circuit 11. The start/stop circuit 21 determines a start command given from the outside, and starts the slope signal generation circuit 22 and the high frequency modulation circuit 17. Next, when the speed command is given as a step signal, it is converted into a ramp signal by the slope signal generation circuit 22, and inputted to the pattern generation circuit 19, where it is converted into a voltage pattern signal and a frequency pattern signal. The voltage pattern signal output from the pattern generation circuit 19 is converted by the voltage correction circuit 18 into a voltage pattern signal corresponding to the DC power supply voltage, and is input to the high frequency modulation circuit 17 together with the frequency pattern signal. Here, it is converted into a pulse signal that realizes pulse width modulation control and input to the base drive circuit 16, and a base signal corresponding to the pulse signal is sent to the base drive circuit 16. ) is applied to the base of transistor 1, and 9) transistor 1 is controlled to turn on and off. Therefore, an AC output having a voltage and frequency according to the speed command is obtained in the inverter circuit. By providing the AC output to the electric motor 27, the speed of the electric motor 27 can be controlled. On the other hand, the failure detection circuit 20 determines the levels of DC low voltage, DC overvoltage, DC overcurrent, AC overvoltage, and AC overcurrent using analog values.
If it exceeds 0%, an abnormal signal is output, and if it exceeds 150% of the rated value, a failure signal is output. However, since voltage-resistant connectors are expensive, the number of bins that can be used is limited, and each abnormal signal and failure signal is routed through an OR gate, and is treated as one abnormal signal and one failure signal. Outputting externally.

[Problem that the invention seeks to solve]

Since the conventional inverter device is configured as described above, if a failure occurs in the inverter device inside the pressure bulb during deep sea diving, a failure signal is output to the outside of the device and the no-fuse breaker 24 for switching on/off the power is output. , After opening the electromagnetic contactor 25, the deep-sea submersible is brought to the surface, so when it comes to the surface, even when investigating the details of the failure, a single failure signal can detect DC low voltage, DC overvoltage, DC overcurrent, AC overvoltage, It is impossible to determine whether it is an AC overcurrent or not, and since the power supply has been cut off, there is nothing stored inside the inverter, and failure analysis requires a lot of time. There was a problem. Furthermore, even if failure information is stored using a fault indicator, etc. that has a mechanical interlock inside the inverter, the device is covered by the pressure resistance method, so in order to investigate the failure mode, it is necessary to use the voltage resistance method. There were problems, such as the need to remove and disassemble the ship from the hull, and the investigation required a lot of time and work.

This invention was made to solve the above-mentioned problems, and provides an inverter device for a deep-sea submersible vessel that can determine abnormalities and failure details from the outside without dismantling the inverter device housed in a pressure-resistant method. The purpose is to

[Means for solving problems]

The inverter device according to the present invention converts analog signals output from detection circuits for various currents, voltages, etc. into a A supercapacitor is connected in parallel with the power supply for the control power supply of this random access memory, and various abnormality and failure signals output from the microcomputer are input to the random access memory and stored. data into erasable read-only memory,
It is configured to be memorized.

[For production]

The storage means in this invention stores the DC voltage and DC current sampled during the operation of the inverter circuit.

Among AC voltage and AC current detection signals, the data for a predetermined period before and after a failure is stored, and this data is retained even after control power is lost using the charge stored in the supercapacitor. , the above data is read out as necessary, and the above accident/failure analysis is made possible without opening the pressure bulb.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. 1st
In the figure, 28 is each detection circuit 12.13.14.15
An analog/digital converter 29 converts the detection output of the analog/digital converter 28 into a digital signal, and a microcomputer 29 that processes the DC and AC voltages and determines whether there is an abnormality in the flow or a failure in the circuit, based on the output of the analog/digital converter 28
30 is a random access memory (hereinafter referred to as
31 is a supercapacitor with a capacity of, for example, 0.33 Farads, for holding the data contents in the RAM 30 for a certain period of time; 32 is a signal of the above-mentioned abnormality or failure; Electrically erasable read-only memory (hereinafter referred to as E'FROM) that also stores specific data on failures
It is. Other blocks that are the same as those shown in FIG. 2 are given the same reference numerals, and the 0th-order operation will be described without redundant explanation. The operation preparation operation, start-up, stop operation, and speed control operation will be explained with reference to FIG. 2 and will be the same as in the next case, so a redundant explanation of the operations will be omitted.

First, while the inverter is operating, the DC voltage, DC current, and
The AC voltage and AC current detection signals are held in the RAM 30 for 200 m5ec, and are replaced with new detection signals after 200 m56c or more. Therefore, if a failure occurs, for example, if the data stored in the RAM 30 is retained for 200 msec before the last data input, the control power will be lost due to the failure, and the operation will resume 10 m5ec after the failure occurs. If it is to be stopped, 190 m5ec before the failure occurs and 1 after the failure occurs.
The data for 0 m5ec will be stored in the RAM 30, and the information on which failure caused the power to be disconnected will also be stored in the RAM 30 and the E"FROM 32.

Next, when the deep-sea research submersible is surfacing, even if the control power is lost, the contents of the RAM 30 are stored in the supercapacitor 31.
By applying an external power source during investigation, a control power supply is established, and by giving a signal to the investigation input bin via real transmission from the outside, the failure details can be determined by serial transmission as well. Reading becomes possible. One! The signal indicating the item of error or failure (what kind of abnormality or failure it was) is stored in RAM3.
0 and E" are stored in the ROM 32, so in the event of an abnormality or failure, for example, a failure item readout signal is input from the outside, the outputted failure item is confirmed, and each detection signal readout signal is used to read out DC current before and after the failure. voltage, direct current, alternating voltage.

The status of the alternating current can be checked, and failure analysis can be easily performed without opening the pressure bulb.

〔Effect of the invention〕

As described above, according to the present invention, the abnormal state or failure state of the inverter device is stored using the storage means, and each detection signal of DC voltage, DC current, AC voltage, and AC current is similarly stored for a certain period of time. Since the configuration is configured to The effect is that it can be implemented in a short period of time.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an inverter device for a deep sea diving research vessel according to an embodiment of the present invention, and FIG. 2 is a block diagram showing a similar conventional inverter device. 11.12, 13.14 are detection circuits, 28 is analog/
Digital converter, 29, microcomputer, 30
is a random access memory (storage means), 31 is a supercapacitor, and 32 is a read-only memory (E”FROM).
). In addition, in the figures, the same reference numerals are the same, and the following indicates corresponding parts. Patent applicant Mitsubishi Electric Co., Ltd. agent Patent attorney 1) Hiroshi Sawa, 1) (Other 2)
name) “--P Figure 1

Claims (4)

[Claims] (1) A detection circuit that detects DC voltage, DC current, AC voltage, AC current, etc. of the inverter circuit, an analog/digital converter that converts the output of this detection circuit into digital, and a digital output of this analog/digital converter. a microcomputer that determines an abnormality or failure of the inverter circuit based on the above, and a microcomputer that stores the detected output while replacing it with a new one at regular intervals;
An inverter device for a deep-sea submersible vessel, comprising: storage means for storing details of the abnormality or failure; and a pressure bulb housing the detection circuit, analog/digital converter, microcomputer, and storage means together with the inverter circuit. (2) A patent claim characterized in that the storage device stores detection outputs within a certain period of time from the time when an abnormality or failure occurs, and the progress of the abnormality or failure can be read by a read command. An inverter device for a deep-sea submersible vessel according to item 1. (3) The inverter device for a deep-sea submersible vessel according to claim 1, wherein the storage means is a random access memory and an electrically erasable read-only memory. (4) The inverter device for a deep-sea submersible vessel according to claim 1, wherein a supercapacitor for retaining data contents for a certain period of time is connected to the random access memory.