JP7276617B2 - MOTOR MONITORING DEVICE, MOTOR MONITORING METHOD, AND COMPUTER PROGRAM - Google Patents

Description

The present disclosure relates to a motor monitoring device, a motor monitoring method, and a computer program. This application claims priority from Japanese Patent Application No. 2020-176745 filed on October 21, 2020. All the contents described in the Japanese patent application are incorporated herein by reference.

Patent Literature 1 discloses a fault diagnosis device for electric machines. The fault diagnosis device of Patent Document 1 detects a leakage current of an electric machine, and diagnoses an insulation state of the electric machine based on the detected leakage current.

JP 2020-26967 A

One aspect of the present disclosure is a motor monitor. The disclosed motor monitoring device acquires sensor data output from a plurality of sensors for monitoring motor equipment in which mechanical and electrical abnormalities may occur; and a second display unit indicating a second state of the motor equipment on the same screen based on the sensor data; generating monitoring screen information; on a screen, wherein the first state is the state of the motor equipment caused by the mechanical abnormality, and the second state is It is the state of the motor equipment resulting from the electrical anomaly.

Another aspect of the present disclosure is a motor monitoring method. In the disclosed motor monitoring method, a motor monitoring device acquires sensor data output from a plurality of sensors for monitoring motor equipment in which mechanical and electrical abnormalities may occur, and based on the sensor data, the motor equipment detects a first The motor monitoring device generates monitoring screen information configured to display on the same screen a first display section showing the first state and a second display section showing the second state of the motor equipment based on the sensor data. and displaying the monitoring screen information on the screen by the motor monitoring device, wherein the first state is the state of the motor facility caused by the mechanical abnormality, and the second state is the state of the motor equipment caused by the electrical abnormality. This is the state of the motor equipment.

Another aspect of the disclosure is a computer program product. The disclosed computer program is a computer program for causing a computer to execute monitoring processing, wherein the monitoring processing is sensor data output from a plurality of sensors for monitoring motor equipment in which mechanical and electrical abnormalities may occur. and a first display unit showing the first state of the motor equipment based on the sensor data and a second display unit showing the second state of the motor equipment based on the sensor data on the same screen. a process of generating monitoring screen information configured to be displayed; and a process of displaying the monitoring screen information on a screen, wherein the first state is a state of the motor equipment caused by the mechanical abnormality; The second state is a state of the motor equipment caused by the electrical abnormality.

FIG. 1 is an overall configuration diagram of a system including motor equipment and a motor monitoring device. FIG. 2 is a configuration diagram of the motor monitoring device. FIG. 3 is an explanatory diagram of the monitoring process. FIG. 4 is a flowchart of current value determination processing. FIG. 5 is a flowchart of current difference determination processing. FIG. 6 is a diagram showing a monitoring screen. FIG. 7 is a diagram showing the first motor equipment screen (normal). FIG. 8 is a diagram showing an R-phase current value time-series data display section. FIG. 9 is a diagram showing an S-phase current value time-series data display section. FIG. 10 is a diagram showing a T-phase current value time-series data display section. FIG. 11 is a diagram showing first current difference time-series data display portions of the R phase and the S phase. FIG. 12 is a diagram showing the R-phase and T-phase second current difference time-series data display portions. FIG. 13 is a diagram showing the S-phase and T-phase third current difference time-series data display portions. FIG. 14 is a diagram showing the first motor equipment screen (at the time of abnormality). FIG. 15 is a diagram showing an R-phase current value time-series data display section. FIG. 16 is a diagram showing an S-phase current value time-series data display section. FIG. 17 is a diagram showing a T-phase current value time-series data display section. FIG. 18 is a diagram showing first current difference time-series data display portions of the R phase and the S phase. FIG. 19 is a diagram showing the R-phase and T-phase second current difference time-series data display portions. FIG. 20 is a diagram showing the S-phase and T-phase third current difference time-series data display portions.

[Problems to be Solved by the Present Disclosure]
Anomalies that occur in motor equipment include mechanical anomalies and electrical anomalies. A mechanical anomaly is an anomaly that occurs in a mechanical system in a motor installation, such as motor bearing deterioration or lack of motor shaft alignment. An electrical fault is a failure that occurs in the electrical system of a motor installation, such as motor insulation deterioration or motor circuit failure.

When some trouble occurs in the motor equipment, it is desirable to distinguish whether the trouble is caused by a mechanical abnormality or an electrical abnormality. However, the device of Patent Literature 1 only diagnoses a single condition caused by an electrical abnormality, the insulation condition. Therefore, even if the apparatus of Patent Document 1 is used, it is difficult to distinguish between mechanical and electrical abnormalities in motor equipment.

Therefore, it is desirable to facilitate a determination that distinguishes between mechanical and electrical abnormalities in motor equipment.
[Effect of the present disclosure]
Advantageous Effects of Invention According to the present disclosure, it is possible to facilitate a determination that distinguishes between a mechanical abnormality and an electrical abnormality in motor equipment.
[Description of Embodiments of the Present Disclosure]
(1) A motor monitoring device according to an embodiment includes a process of acquiring sensor data output from a plurality of sensors for monitoring motor equipment that may cause mechanical and electrical abnormalities, and a process of acquiring the motor equipment based on the sensor data. monitoring screen information configured to display on the same screen a first display section showing a first state of the equipment and a second display section showing a second state of the motor equipment based on the sensor data; and a process of displaying the monitoring screen information on a screen. The first state is the state of the motor equipment resulting from the mechanical malfunction. The second state is a state of the motor equipment caused by the electrical abnormality. In this case, a user who refers to the screen based on the monitoring screen information can easily make a judgment by distinguishing between mechanical and electrical abnormalities in the motor equipment.
(2) The process of acquiring sensor data includes a process of acquiring sensor data output from a plurality of current sensors for measuring motor current. Since the motor current can be affected by both mechanical and electrical faults, a plurality of sensors, including at least a current sensor, to determine the first and second states of the motor installation. can be done.
(3) The process of acquiring the sensor data includes a plurality of sensors for measuring vibration of the motor equipment, a plurality of sensors for measuring temperature of the motor equipment, a plurality of sensors for measuring sound of the motor equipment, and the A process of obtaining sensor data output from at least one of a plurality of sensors for measuring leakage current of the motor equipment is included. In this case, since it is possible to display more states of the motor equipment, it becomes easier to grasp the state of the motor equipment.
(4) It is preferable that the monitoring screen information is configured to display the first state and the second state of each of the plurality of motor installations on the same screen. In this case, a plurality of motor installations can be monitored while being compared.
(5) The motor equipment includes a converter that converts a polyphase alternating current to a direct current, and a direct current motor that is driven by the direct current output from the converter. It is preferable to include a process of acquiring sensor data output from a plurality of alternating current sensors that measure the current of each phase in the multiphase alternating current. Even if the motor is a direct current motor, if the power supplied to the motor equipment is polyphase alternating current, electrical faults can occur in each phase of the polyphase alternating current. Having an AC sensor that measures the current of each phase in the multiphase AC current makes it easier to monitor electrical abnormalities that occur in each phase.
(6) Preferably, the second state includes a state of current difference between at least two phases in the polyphase alternating current. In this case, the current differential facilitates the monitoring of open phases in polyphase alternating current. The two phases in the polyphase alternating current are, for example, two phases in the R phase, the S phase, and the T phase in the case of a three-phase alternating current having an R phase, an S phase, and a T phase. Specifically, the two phases are R phase and S phase, R phase and T phase, or S phase and T phase. The current difference is, for example, a current difference between the R phase and the S phase, a current difference between the R phase and the T phase, or a current difference between the S phase and the T phase. The current difference as the second state may be one or more of the current difference between the R phase and the S phase, the current difference between the R phase and the T phase, and the current difference between the S phase and the T phase.
(7) The monitoring process further includes a current difference determination process for comparing the current difference with a current difference threshold value for determining an abnormality of the current difference, and the second display unit performs the current difference determination. Preferably, it is arranged to display the results of the processing. In this case, it becomes easier to monitor an abnormality in the current difference.
(8) It is preferable that the current difference threshold is set to be adjustable. If the threshold is adjustable, the threshold can be changed to an appropriate value according to the conditions of the motor equipment.
(9) The polyphase alternating current is an alternating current of three or more phases, and the monitoring process further comprises obtaining a current difference between each of a plurality of phases from the sensor data, and is displayed on the second display unit. Preferably, the second state is the maximum value of current differences between the plurality of phases. In this case, even if the current differences between the plurality of phases are obtained, the maximum value among the current differences between the plurality of phases may be displayed as the second state on the second display unit, so that the display area can be saved.
(10) Preferably, the first state includes a current value state of at least one phase in the polyphase alternating current. In this case, the state of the current value of at least one phase in the polyphase alternating current can be monitored.
(11) The monitoring process further includes a current value determination process for comparing the current value and a current value threshold value for determining an abnormality of the current value, and the first display unit performs the current value determination Preferably, it is arranged to display the results of the processing. In this case, it becomes easier to monitor an abnormality in the current value.
(12) It is preferable that the current value threshold is set to be adjustable. If the threshold is adjustable, the threshold can be changed to an appropriate value according to the conditions of the motor equipment.
(13) The monitoring process further comprises obtaining the phase having the largest current value in the polyphase alternating current, and the first state displayed on the first display unit is the It is preferably the current value of the phase with the largest current value. In this case, the current value of the phase having the largest current value in the multiphase alternating current may be displayed as the first state on the first display unit, so that the display area can be saved.
(14) In the motor monitoring method according to the embodiment, a motor monitoring device acquires sensor data output from a plurality of sensors for monitoring motor equipment in which mechanical and electrical abnormalities may occur, and based on the sensor data, monitoring screen information configured to display on the same screen a first display section showing a first state of the motor equipment and a second display section showing a second state of the motor equipment based on the sensor data; The motor monitoring device generates and causes the motor monitoring device to display the monitoring screen information on the screen, the first state is the state of the motor equipment caused by the mechanical abnormality, and the second state is the electrical It is the state of the motor equipment caused by the abnormality. In this case, a user who refers to the screen based on the monitoring screen information can easily make a judgment by distinguishing between mechanical and electrical abnormalities in the motor equipment.
(15) A computer program according to an embodiment is a computer program for causing a computer to execute a monitoring process, wherein the monitoring process is performed from a plurality of sensors for monitoring motor equipment in which mechanical and electrical abnormalities may occur. A process of acquiring output sensor data, a first display section showing a first state of the motor equipment based on the sensor data, and a second display section showing a second state of the motor equipment based on the sensor data. and a process of displaying the monitoring screen information on the same screen, wherein the first state is the motor equipment caused by the mechanical abnormality and the second state is the state of the motor equipment caused by the electrical abnormality. In this case, a user who refers to the screen based on the monitoring screen information can easily make a judgment by distinguishing between mechanical and electrical abnormalities in the motor equipment. A computer program according to an embodiment is stored in a computer-readable, non-transitory storage medium.
[Details of the embodiment of the present disclosure]
FIG. 1 shows a system including a motor monitoring device 10 according to an embodiment. The system comprises one or more motor installations 51 , 53 , 55 , 57 to be monitored and a motor monitoring device 10 . The motor facilities 51, 53, 55, 57 are installed, for example, in factories. Motor monitoring device 10 is connected to motor installations 51 , 53 , 55 and 57 via network 70 . Motor monitoring device 10 may be configured to remotely monitor motor installations 51 , 53 , 55 , 57 or may be configured to monitor near motor installations 51 , 53 , 55 , 57 . Network 70 is, for example, a wired network or a wireless network.

The plurality of motor installations 51 , 53 , 55 , 57 shown in FIG. 1 includes a first motor installation 51 , a second motor installation 53 , a third motor installation 55 and a fourth motor installation 57 . The number of motor installations 51, 53, 55, 57 to be monitored by the motor monitoring device 10 is not particularly limited. The second motor equipment 53, the third motor equipment 55, and the fourth motor equipment 57 shown in FIG. 1 have the same configuration as the first motor equipment 51. However, the configuration of each motor equipment 51, 53, 55, 57 may be different.

Although the monitoring of the first motor installation 51 by the motor monitoring device 10 will be described below as an example, the motor monitoring device 10 can monitor the other motor installations 53 , 55 and 57 in the same way.

As shown in FIG. 1, the first motor arrangement 51 comprises a motor 518 and a motor circuit 510 for driving the motor. Motor 518 is, for example, a direct current driven direct current motor or an alternating current driven alternating current motor. In the following description, as an example, the motor 518 is a DC motor. A motor circuit 510 of the first motor equipment 51 is supplied with a polyphase AC current from a polyphase AC power supply 501 for driving a motor 518 . A polyphase alternating current is a combination of two or more single-phase alternating currents with different phases. In the following description, as an example, polyphase alternating current is three-phase alternating current. A three-phase alternating current is an alternating current obtained by combining three single-phase alternating currents of an R-phase, an S-phase, and a T-phase. The three phases are 120 degrees apart from each other.

A motor circuit 510 shown in FIG. 1 includes a converter 520 that converts three-phase alternating current supplied from a power supply 501 into direct current. Converter 520 shown in FIG. 1 is a three-phase full-wave rectifier circuit. Converter 520 includes a primary side 520A to which three-phase alternating current is input, and a secondary side 520B that outputs direct current. A power source 501 is connected to the primary side 520A. A motor 518 is connected to the secondary side 520B. Motor 518 is driven by the direct current output from converter 520 .

The current flowing through the primary side 520A of the converter 520 is hereinafter referred to as primary side current. Among the currents on the primary side, the current flowing through the R phase is called the R phase current, the current flowing through the S phase is called the S phase current, and the current flowing through the T phase is called the T phase current. The current flowing through secondary side 520B of converter 520 is referred to as secondary side current. The primary side current and the secondary side current are collectively referred to as motor current. Note that an inductor 517 is provided between the secondary side 520B and the motor 518 in the motor circuit 510 shown in FIG.

Converter 520 includes thyristors 521, 522, 524, 525, 527, and 528 as rectifying elements. In FIG. 1, thyristors 521 and 522 are R-phase rectifying elements, thyristors 524 and 525 are S-phase rectifying elements, and thyristors 527 and 528 are T-phase rectifying elements.

In converter 520, thyristor phase control is performed by a control circuit (not shown). Thyristor phase control is a method of controlling the output voltage of converter 520 by changing the phase (timing) for turning on 521, 522, 524, 525, 527, and 528. FIG.

Motor circuit 510 includes an electromagnetic switch (not shown). The electromagnetic switch opens and closes the electric circuit through which the current flows to the motor 518 by the operation of the electromagnet. An electromagnetic switch can turn ON/OFF the current flowing to the motor 518 . An electromagnetic switch is also called a magnet switch.

In addition, the first motor equipment 51 includes mechanical equipment (not shown) that is connected to a rotating shaft (not shown) of the motor 518 and driven to rotate, and a mechanical structure (not shown) for installing the motor 518 in the factory. Prepare. The rotating shaft of the motor 518 and the rotating shaft of the machinery rotationally driven by the motor are rotatably supported by bearings. The rotating shaft of the motor 518 and the rotating shaft of the machinery that is rotationally driven by the motor are axially aligned (shaft alignment) so that they are positioned on the same axis.

The aforementioned motor circuit 510 is an electrical system element in the first motor equipment 51 . On the other hand, the mechanical equipment to be rotationally driven by the motor 518 and the mechanical structure for installing the motor 518 are mechanical elements of the first motor equipment 51 . The motor 518 is both an electrical element and a mechanical element in the first motor equipment 51 . For example, the electrical wiring provided to the motor 518 is an element of the electrical system, and the rotating shaft provided to the motor 518 is an element of the mechanical system. Further, the casing provided in the motor 518 is a mechanical element because it has a mechanical structure, and is also an electrical element because it is a portion through which leakage current flows.

Motor equipment such as the first motor equipment 51 may malfunction. Malfunctions include a mechanical abnormality that occurs in the mechanical system of the first motor equipment 51 and an electrical abnormality that occurs in the electrical system of the first motor equipment 51 . Mechanical anomalies are, for example, motor bearing deterioration, shaft misalignment, and mechanical overload. The electrical abnormality is, for example, insulation deterioration, failure or contact failure of the thyristors 521, 522, 524, 525, 527, 528, or an open state in an electromagnetic switch (magnet switch).

For the detection of mechanical and electrical anomalies occurring in the first motor installation 51, the first motor installation 51 is equipped with one or more sensors. It should be noted that the other motor installations 53, 55, 57 are similarly equipped with one or more sensors. The first motor installation 51 shown in FIG. 1 comprises a plurality of sensors 511, 512, 513, 514, 515, 516, by way of example. The plurality of sensors are, for example, a current sensor 511, a vibration sensor 512, a temperature sensor 513, a sound sensor 514, a leakage current sensor 515, and a contact sensor 516 of an electromagnetic switch.

Below, the measured value output from the current sensor 511 is the first sensor data 130, the measured value output from the vibration sensor 512 is the second sensor data 135, and the measured value output from the temperature sensor 513 is the third sensor data 136. , the measured value output from the sound sensor 514 is referred to as fourth sensor data 137, the measured value output from the leakage current sensor 515 is referred to as fifth sensor data 138, and the measured value output from the contact sensor 516 is referred to as sixth sensor data 139. Sometimes. In the embodiment, each sensor data 130, 135, 136, 137, 138, 139 is time-series data that changes over time. These sensor data 130 , 135 , 136 , 137 , 138 and 139 are collectively referred to as sensor data 90 . The sensor data 90 are stored in a database 13 which will be described later.

A current sensor 511 measures the motor current. If the load on the motor 518 becomes too large, the current flowing through the motor 518 will increase. Further, if the converter 520 malfunctions, an abnormality occurs in the motor current.

In an embodiment, current sensor 511 is an AC sensor arranged to measure the current of each of the three phases on primary side 520A of converter 520 . That is, the current sensor 511 is arranged to measure the primary side current. The current sensor 511 of the embodiment outputs an R-phase current value 131 , an S-phase current value 132 , and a T-phase current value 133 as first sensor data 130 . By providing the current sensor 511 on the primary side 520A of the converter 520, it becomes easy to grasp a failure or a sign of failure of each phase of the converter 520. FIG. Current sensor 511 may be provided on secondary side 520B of converter 520 so as to measure the secondary side current flowing to motor 518 .

A vibration sensor 512 measures the vibration of the first motor equipment 51 . When bearing deterioration of the motor 518 occurs, vibration increases. In addition, if the shaft is not centered enough, the vibration will increase. In general, bearing deterioration of the motor 518 causes high-frequency vibration to increase, and shaft misalignment causes low-frequency vibration to increase. A vibration sensor 512 measures these vibrations.

A temperature sensor 513 measures the temperature of the first motor installation 51 . A temperature sensor 513 is provided to measure the temperature of the casing of the motor 518, for example. The temperature of the motor 518 may rise due to causes such as leakage current due to insulation deterioration of the casing. A temperature sensor 513 measures such a temperature rise.

The sound sensor 514 measures the sound (motor equipment sound) generated in the first motor equipment 51 . Mechanical and electrical anomalies in the first motor equipment 51 may appear as abnormal noises. Sound sensor 514 measures such noise.

A leakage current sensor 515 measures the leakage current occurring in the first motor installation 51 . Leakage current sensor 515 is provided to measure the leakage current of motor 518, for example. Insulation deterioration of the casing of the motor 518 may increase leakage current. A leakage current sensor 515 measures such leakage current.

The contact sensor 516 measures the connection state (ON/OFF state) of the contact in the electromagnetic switch included in the first motor equipment 51 . When the motor 518 is overloaded, the electromagnetic switch opens and cuts off the current supply to the motor 518 . A contact sensor 516 detects the set connection state (ON/OFF state) of such an electromagnetic switch.

The first motor installation 51 comprises a transmitter 519 for transmitting sensor data 90 to the motor monitoring device 10 . A transmitter 519 is wired or wirelessly connected to each sensor 511 , 512 , 513 , 514 , 515 , 516 so as to acquire sensor data 90 . The transmitter 519 transmits the acquired sensor data 90 to the motor monitoring device 10 via the network 70 .

The motor monitoring device 10 shown in FIG. 2 constantly monitors the first motor equipment 51 based on the acquired sensor data 90 . A motor monitoring device 10 according to the embodiment is configured by a computer including a processor 11 and a memory 12 connected to the processor 11 . The computer configuring the motor monitoring device 10 further includes a communication interface 15 .

The processing device 11 is, for example, a CPU. The memory 12 has, for example, a primary storage device and a secondary storage device. A primary storage device is, for example, a RAM. The secondary storage device is, for example, a hard disk drive (HDD) or solid state drive (SSD). The communication interface 15 is used, for example, for communication with the transmitter 519 and communication with the user terminal 30 described below.

A computer forming the motor monitoring device 10 executes a monitoring process 100 . Memory 12 stores a computer program 14 for operating a computer as motor monitoring device 10 . The computer program 14 comprises program code for causing the processing device 11 to execute the monitoring process 100 . The processing device 11 reads the computer program 14 from the memory 12 and executes it. The monitoring process 100 will be described later.

Memory 12 comprises database 13 . Database 13 is configured to store sensor data 90 received from transmitter 519 . That is, the database 13 stores the first sensor data 130 including the R-phase current value, the S-phase current value 132 and the T-phase current value 133, the second sensor data 135, the third sensor data 136, the fourth sensor data 137, the 5 sensor data 138 and sixth sensor data 139 are stored. Note that the sensor data 90 stored in the database 13 is time series data of the sensor data 90 .

Also, the database 13 is configured to store a determination result 95 from a determination process 160, which will be described later. Further, the database 13 is configured to store threshold data 220 indicating various thresholds used in the determination process 160, which will be described later. The threshold will be described later. Note that the database 13 may be provided on a computer separate from the motor monitoring device 10 .

As shown in FIG. 3, the monitoring process 100 comprises a sensor data acquisition process 150. FIG. The sensor data acquisition process 150 according to the embodiment is configured such that the motor monitoring device 10 acquires the sensor data 90 from the sensors 511 , 512 , 513 , 514 and 516 . In the sensor data acquisition process 150 , the motor monitoring device 10 receives sensor data 90 from the network 70 via the communication interface 15 . The sensor data acquisition process 150 may be configured to acquire sensor data 90 stored in an external database.

Since the sensors 511 , 512 , 513 , 514 , 516 constantly monitor the first motor equipment 51 , the sensor data acquisition process 150 always acquires the sensor data 90 . The sensor data acquisition process 150 saves the acquired sensor data 90 in the database 13 .

The monitoring process 100 shown in FIG. 3 includes a decision process 160 . In the determination processing 160 according to the embodiment, determination is performed on each of the first sensor data 130, the second sensor data 135, the third sensor data 136, the fourth sensor data 137, the fifth sensor data 138, and the sixth sensor data 139. configured to The determination process 160 is executed each time new sensor data 90 is accumulated in the database 13 in order to realize constant monitoring. In determination processing 160, it is determined whether each sensor data 130, 135, 136, 137, 138, 139 is normal or abnormal. The threshold indicated by the threshold data 220 is used in the determination process 160 .

The determination process 160 according to the embodiment includes a current value determination process 161A, a current difference determination process 161B, a vibration determination process 162, a temperature determination process 163, a sound determination process 164, a leakage current determination process 165, and a switch connection determination process 166. .

Based on the first sensor data 130, the current value determination process 161A determines whether the motor current is overcurrent. Overcurrents are caused by both mechanical and electrical faults. For example, if the motor 518 is overloaded due to a mechanical fault, an overcurrent will occur. An electrical abnormality such as an open phase may also cause an overcurrent.

FIG. 4 shows the procedure of the current value determination process 161A. First, the processor 11 of the motor monitoring device 10 reads out the current R-phase current value 131, S-phase current value 132, and T-phase current value 133 from the database 13 (step S101). Subsequently, the processing device 11 compares each of the R-phase current value 131, the S-phase current value 132, and the T-phase current value 133 with the current value threshold (step S102). The current value threshold is one of the thresholds included in the threshold data 220 . If the current values 131, 132, 133 exceed the current value threshold, the current values 131, 132, 133 are determined to be abnormal, ie, overcurrent. If the current values 131, 132, 133 do not exceed the current value threshold, the current values 131, 132, 133 are determined to be normal.

In current value determination processing 161A of the embodiment, abnormality/normality is determined for current values 131, 132, and 133 of each of the three phases, so abnormality of each phase in converter 520 included in motor circuit 510 is detected.

The processing device 11 saves the determination result 95 using the current value threshold in the database 13 for each of the R-phase current value 131, the S-phase current value 132, and the T-phase current value 133 (step S103). The stored judgment result 95 is reflected in the display on the monitoring screen 300, which will be described later.

The processor 11 also obtains the phase with the largest current values 131, 132, 133 among the R-phase, S-phase, and T-phase (step S104). The current value in the phase with the largest current value is displayed as the motor current value on the monitor screen 300, which will be described later.

Based on the first sensor data 130, the current difference determination process 161B determines the current difference between each phase in the three-phase alternating current. Here, the current difference between each phase includes a first current difference between the R phase and the S phase, a second current difference between the R phase and the T phase, and a third current difference between the S phase and the T phase. . If the current difference between the phases becomes large, there is a risk of open phase. An open phase can be detected by determining the current difference.

FIG. 5 shows the procedure of the current difference determination process 161B. First, the processor 11 of the motor monitoring device 10 reads the current R-phase current value 131, S-phase current value 132, and T-phase current value 133 from the database 13 (step S111). Subsequently, the processing device 11 calculates the first current difference between the R-phase and the S-phase, the second current between the R-phase and the T-phase, and the A difference and a third current difference between the S phase and the T phase are calculated (step S112).

The processing device 11 compares each of the first current difference, the second current difference, and the third current difference with the current difference threshold (step S113). The current difference threshold is one of thresholds included in the threshold data 220 . Here, the current difference threshold includes a lower limit threshold and an upper limit threshold that define the normal range of the current difference. If the current difference is within the normal range between the lower threshold and the upper threshold, the current difference is determined to be normal. If the current difference is outside the normal range, it is determined that the current difference is abnormal. That is, if the current difference is smaller than the lower limit threshold or larger than the upper limit threshold, it is determined that the current difference is abnormal.

When one or more phases out of the three phases are open, one or more current differences among the first current difference, the second current difference, and the third current difference increase and fall outside the normal range.

The processing device 11 saves the determination result 95 using the current difference threshold for each of the first current difference, the second current difference, and the third current difference in the database 13 (step S114). The stored judgment result 95 is reflected in the display on the monitoring screen 300, which will be described later.

Also, the processing device 11 obtains the largest current difference among the first current difference, the second current difference, and the third current difference (step S115). The largest current difference is displayed as the current difference on the monitoring screen 300, which will be described later.

Vibration determination processing 162 shown in FIG. 3 determines whether the vibration in the first motor equipment 51 is normal or abnormal based on the second sensor data 135 . In the vibration determination process 162, high frequency components and low frequency components of the second sensor data 135, which are vibration measurements, are obtained. High frequency components and low frequency components are obtained, for example, by filtering the second sensor data 135 . The high-frequency component of the second sensor data 135 is high-frequency vibration caused by bearing deterioration of the motor 518 or the like. The low-frequency component of the second sensor data 135 is low-frequency vibration caused by insufficient shaft alignment. In the vibration determination process 162 , determination is made by comparing each of the high-frequency vibration and the low-frequency vibration with the vibration threshold indicated by the threshold data 220 . If the vibration exceeds the threshold for vibration, it is determined to be abnormal, and if it does not exceed the threshold for vibration, it is determined to be normal. The determination result 95 is stored in the database 13 and reflected in the display on the monitoring screen 300, which will be described later. In the vibration determination process 162, high frequency vibration and low frequency vibration need not be distinguished.

A temperature determination process 163 shown in FIG. 3 determines whether the temperature of the first motor equipment 51 is normal or abnormal based on the third sensor data 136 . In the temperature determination process 163 , determination is made by comparing the third sensor data 136 with the temperature threshold indicated by the threshold data 220 . If the temperature indicated by the third sensor data 136 exceeds the threshold for temperature, it is determined to be abnormal, and if it does not exceed the threshold for temperature, it is determined to be normal. The determination result 95 is stored in the database 13 and reflected in the display on the monitoring screen 300, which will be described later.

The sound determination process 164 shown in FIG. 3 determines whether the sound of the first motor equipment 51 is normal or abnormal based on the fourth sensor data 137 . In other words, in the sound determination process 164, it is determined whether or not abnormal noise is generated. In the sound determination process 164 , determination is made by comparing the fourth sensor data 137 with the threshold for sound indicated by the threshold data 220 . If the loudness of the sound indicated by the fourth sensor data 137 exceeds the threshold for sound, it is determined to be abnormal, and if it does not exceed the threshold for sound, it is determined to be normal. The determination result 95 is stored in the database 13 and reflected in the display on the monitoring screen 300, which will be described later.

A leakage current determination process 165 shown in FIG. 3 determines whether the leakage current in the first motor equipment 51 is normal or abnormal based on the fifth sensor data 138 . In the leakage current determination process 165 , determination is made by comparing the fifth sensor data 138 with the leakage current threshold indicated by the threshold data 220 . If the magnitude of the leakage current indicated by the fifth sensor data 138 exceeds the threshold for leakage current, it is determined to be abnormal, and if it does not exceed the threshold for leakage current, it is determined to be normal. The determination result 95 is stored in the database 13 and reflected in the display on the monitoring screen 300, which will be described later.

The switch connection determination process 166 shown in FIG. 3 determines opening/closing (ON/OFF) of the electromagnetic switch based on the sixth sensor data 139 . The determination result 95 is stored in the database 13 and reflected in the display on the monitoring screen 300, which will be described later.

The monitoring process 100 shown in FIG. 3 includes a generation process 170 of the monitor screen information 300A and an output process 180 of the monitor screen information 300A. The monitoring screen information 300A is generated based on the sensor data 90 accumulated in the database 13 and the judgment result 95 by the judgment processing 160. FIG.

The monitoring screen information 300A is used for displaying the monitoring screen 300. FIG. The monitoring screen information 300A is display data for configuring the monitoring screen 300 displayed on a display (not shown). The monitor screen 300 is a screen that is referred to by a monitor for monitoring the motor equipment 51 , 53 , 55 , 57 . In the embodiment, the monitor screen information 300A is transmitted to the user terminal 30 (see FIG. 1) used by the monitor by the monitor screen information output process 180. FIG. The user terminal 30 causes the monitor screen 300 based on the monitor screen information 300A to be displayed on the display of the user terminal 30 . Note that the user terminal 30 is connected to the motor monitoring device 10 via the network 70 . Also, the monitoring screen 300 may be displayed on a display included in the motor monitoring device 10 .

In the generation process 170 of the monitoring screen information 300A, the processing device 11 updates the monitoring screen information 300A so that the latest sensor data 90 and determination result 95 are reflected. The updated monitor screen information 300A is transmitted to the user terminal 30 one by one.

The monitoring process shown in FIG. 3 includes threshold adjustment process 200 . The threshold adjustment processing 200 is processing for adjusting various thresholds stored in the database 13 . Adjustment is performed by user operation such as an observer. A user operation is performed, for example, by operating an input device such as a keyboard or a mouse provided in the user terminal 30 (see FIG. 1). The operation of adjusting the threshold includes, for example, selecting the threshold to be adjusted and inputting the adjusted threshold. The adjusted threshold is stored in database 13 and used in subsequent decision processing 160 . The adjustable threshold allows appropriate modification of the threshold according to the conditions of the motor installation.

FIG. 6 shows an example of a monitor screen 300 based on monitor screen information 300A generated and updated by the generation process 170. FIG. Here, the monitoring screen 300 is also referred to as a "motor diagnosis board". The monitoring screen 300 includes a first motor equipment screen 301 indicating the state of the first motor equipment 51 , a second motor equipment screen 302 indicating the state of the second motor equipment 53 , and a third motor equipment screen 302 indicating the state of the third motor equipment 55 . A motor equipment screen 303 and a fourth motor equipment screen 304 showing the state of the fourth motor equipment 57 are provided. As shown in FIG. 6, the monitor screen 300 is configured to simultaneously display the status of multiple motor installations. By simultaneously displaying the states of the plurality of motor installations 51, 53, 55, 57 within the single monitoring screen 300, the observer can compare the states of the plurality of motor installations 51, 53, 55, 57. This makes it easy to detect changes and abnormalities in the motor equipment 51, 53, 55, 57.

Among the plurality of motor equipment screens 301, 302, 303, 304, the first motor equipment screen 301 will be described below, but in FIG. 6, the other motor equipment screens 302, 303, 304 have the same configuration. ing. However, the other motor equipment screens 302 , 303 , 304 may differ from the first motor equipment screen 301 .

FIG. 7 shows an enlarged view of the first motor equipment screen 301 included in the monitoring screen 300. As shown in FIG. The first motor equipment screen 301 includes a vibration display section 311, a heat generation display section 312, an abnormal sound display section 313, an overcurrent display section 314, a vibration display section 315, a switch display section 316, an earth leakage display section 317, and an open phase display section. 318. In addition, in the monitoring screen 300 shown in FIG. 7, the values displayed on all the display units 311, 312, 313, 314, 315, 316, 317, and 318 are normal.

The vibration display section 311 shown in FIG. 7 is configured to display the vibration value of the shaft of the blower included in the first motor equipment 51 . The vibration display unit 311 displays the second sensor data 135 (vibration value), which is the value measured by the vibration sensor 512 provided to measure the vibration value of the shaft of the blower included in the first motor equipment 51. . In the vibration display section 311 , the determination result 95 of the vibration determination processing 162 is displayed as a difference in color of the vibration display section 311 . For example, if the vibration is normal, the entire vibration display section 311 is displayed in green, and if the vibration is abnormal, the entire vibration display section 311 is displayed in red.

The heat generation display section 312 is configured to display the temperature of the first motor equipment 51 . The heat generation display section 312 displays the third sensor data 136 (temperature), which is the value measured by the temperature sensor 513 . In the heat generation display section 312, the determination result 95 of the temperature determination processing 163 is displayed as a difference in color of the heat generation display section 312. FIG. For example, if the temperature is normal, the entire heat generation display section 312 is displayed in green, and if the temperature is abnormal, the entire heat generation display section 312 is displayed in red.

The noise display section 313 is configured to display the volume of the sound of the first motor equipment 51 . The abnormal sound display section 313 displays the fourth sensor data 137 (loudness of the sound), which is the value measured by the sound sensor 514 . In the abnormal sound display section 313, the determination result 95 of the sound determination processing 164 is displayed as a difference in color of the abnormal sound display section 313. FIG. For example, if the sound is normal, the entire abnormal sound display section 313 is displayed in green, and if the occurrence of the abnormal sound is determined to be abnormal, the entire abnormal sound display section 313 is displayed in red.

The overcurrent display section 314 is configured to display the value of the motor current. On the overcurrent display unit 314, the current value in the phase having the largest current values 131, 132, 133 among the R-phase, S-phase, and T-phase is typically displayed as the motor current value. By displaying the maximum value among the three current values 131, 132, 133, the display area for the overcurrent display section 314 can be saved. Therefore, as shown in FIG. 6, even if a plurality of motor equipment screens 301, 302, 303, and 304 are provided in the monitor screen 300, the screen display can be simplified. In the overcurrent display section 314, the determination result 95 of the current value determination processing 161A is displayed as a difference in color of the overcurrent display section 314. FIG. For example, if the current value is normal, the entire overcurrent display section 314 is displayed in green, and if it is determined that there is an overcurrent, the entire overcurrent display section 314 is displayed in red.

The vibration display unit 315 is configured to display the vibration value of the rotor of the blower included in the first motor equipment 51 . The vibration display section 315 displays the second sensor data (vibration value), which is the value measured by the vibration sensor provided to measure the vibration value of the rotor of the blower included in the first motor equipment 51 . In the vibration display section 315, the determination result 95 of the vibration determination processing 162 is displayed as a difference in color of the vibration display section 315. FIG. For example, if the vibration is normal, the entire vibration display section 315 is displayed in green, and if the vibration is abnormal, the entire vibration display section 315 is displayed in red.

The switch display unit 316 is configured to display the opening/closing (ON/OFF) of the electromagnetic switch. The determination result 95 of the switch connection determination process 166 is displayed in characters on the switch display section 316 . For example, if the electromagnetic switch is closed, the character display is "Good connection", and if the electromagnetic switch is open, "Bad connection". In the switch display section 316, the determination result 95 of the switch connection determination processing 166 is also displayed as a difference in the color of the switch display section 316. FIG. For example, if the electromagnetic switch is closed, the entire switch display section 316 is displayed in green, and if the electromagnetic switch is open, the entire switch display section 316 is displayed in red.

The leakage display unit 317 is configured to display the leakage current value in the first motor equipment 51 . The leakage current display portion 317 displays the fifth sensor data 138 (leakage current value), which is the measured value by the leakage current sensor 515 . In the earth leakage display section 317, the judgment result 95 of the leakage current judgment processing 165 is displayed as a difference in color of the earth leakage display section 317. FIG. If the leakage current value is normal, the entire earth leakage display portion 317 is displayed in green, and if the leakage current value is abnormal, the entire earth leakage display portion 317 is displayed in red.

The open-phase display unit 318 is configured to display a current difference between phases in the primary side current, which is multiphase alternating current. Among the first current difference between the R phase and the S phase, the second current difference between the R phase and the T phase, and the third current difference between the S phase and the T phase, the open phase display unit 318 displays the largest current. Differences are displayed representatively. By displaying the maximum value of the three current differences, the display area for the open phase display section 318 can be saved. Therefore, as shown in FIG. 6, even if a plurality of motor equipment screens 301, 302, 303, and 304 are provided on the monitoring screen 300, the screen display can be simplified. In the open-phase display section 318, the determination result 95 of the current difference determination processing 161B is displayed as a difference in color of the open-phase display section 318. FIG. For example, if the current difference is normal, the entire open phase display section 318 is displayed in green, and if it is determined that the current difference is abnormal due to the open phase, the entire open phase display section 318 is displayed in red.

On the monitor screen 300, for one motor equipment 51, multiple items such as vibration, heat, sound, current value, current difference, leakage current, and switch connection status are displayed simultaneously, so that the motor equipment When some abnormality or failure occurs in 51, the observer can distinguish whether the abnormality is a mechanical abnormality or an electrical abnormality.

Here, vibration is a condition of the motor equipment 51 that may change due to mechanical faults. Heat is a condition of the motor equipment 51 that can change due to electrical anomalies such as leakage current due to insulation degradation. Sound is a condition of the motor equipment 51 that may change due to mechanical or electrical faults. The current value, current difference, and leakage current are states of the motor equipment 51 that may change due to an electrical abnormality. Current values can also change due to mechanical anomalies. The switch connection state is a state of the motor installation 51 that can change due to an electrical fault.

In the embodiment, the state of the motor equipment 51 that can change due to a mechanical abnormality is called the first state. Also, the state of the motor equipment 51 that can change due to an electrical abnormality is called a second state. A state that can change due to both a mechanical abnormality and an electrical abnormality, such as a current value, is both the first state and the second state.

Here, among the plurality of display units 311, 312, 313, 314, 315, 316, 317, and 318 shown in FIG. It is the 1st display part which shows. Further, the heat generation display portion 312, the switch display portion 316, the electric leakage display portion 317, and the open phase display portion 318 are second display portions that indicate a second state that can change due to an electrical abnormality. An abnormal sound display section 313 and an overcurrent display section 314 are a first display section that indicates a first state that may change due to a mechanical abnormality, and a second display section that indicates a second state that may change due to an electrical abnormality. In this embodiment, since the first display section and the second display section are displayed at the same time, the observer can distinguish whether the abnormality is a mechanical abnormality or an electrical abnormality.

Each of the display units 311, 312, 313, 314, 315, 316, 317, and 318 included in the monitoring screen 300 can be selected on the monitoring screen 300 by an operation by an observer who is a user. The operation for selection is, for example, clicking on any of the display units 311, 312, 313, 314, 315, 316, 317, 318 with a pointing device such as a mouse connected to the user terminal 30. FIG.

When one of the display units 311, 312, 313, 314, 315, 316, 317, and 318 is selected, the detailed data of the values displayed in the selected display unit are displayed on the monitoring screen 300. FIG. Detailed data is, for example, time-series data. The values displayed on the display units 311, 312, 313, 314, 315, 316, 317, and 318 are current values. Changes in values can be grasped.

FIGS. 8 to 10 show current value time-series data display sections 331, 332, and 333 displayed when the overcurrent display section 314 is selected on the monitoring screen 300 shown in FIG. All of the current values 131, 132, and 133 of each phase displayed in the current value time-series data display units 331, 332, and 333 shown in FIGS. It is. An R-phase current value time series data display section 331 shown in FIG. 8 is displayed in the monitoring screen 300 and shows time series data of the R phase current value 131 . An S-phase current value time-series data display section 332 shown in FIG. 9 is displayed in the monitoring screen 300 and shows time-series data of the S-phase current value 132 . A T-phase current value time series data display section 333 shown in FIG. 10 is displayed in the monitoring screen 300 and shows time series data of the T-phase current value 133 .

FIGS. 11 to 13 show current difference time-series data display sections 351, 352, and 353 displayed when the open phase display section 318 is selected on the monitoring screen 300 shown in FIG. The current differences displayed in the current difference time-series data display sections 351, 352, and 353 shown in FIGS. 11 to 13 are within the normal range indicated by the lower threshold and upper threshold. The R-phase and S-phase first current difference time-series data display section 351 shown in FIG. 11 is displayed in the monitoring screen 300 and shows the time-series data of the R-phase and S-phase first current difference. A second current difference time series data display section 352 between the R phase and the T phase shown in FIG. 12 is displayed in the monitoring screen 300 and shows time series data of the second current difference between the R phase and the T phase. The S-phase and T-phase third current difference time-series data display section 353 shown in FIG. 13 is displayed in the monitoring screen 300 and shows the time-series data of the third current difference between the S-phase and the T-phase.

FIG. 14 shows the monitoring screen 300 when the motor current value displayed on the overcurrent display section 314 and the differential current displayed on the open phase display section 318 are abnormal. In FIG. 14, the hatching applied to the overcurrent display section 314 and the open phase display section 318 indicates red display in case of abnormality.

Even if the motor current value displayed on the overcurrent display section 314 is abnormal, the overcurrent may be caused by a mechanical abnormality caused by a mechanical overload or by an electrical abnormality in the motor circuit 510 such as a malfunction of the converter 520. Sometimes it happens and sometimes it happens. Therefore, it is not possible to know whether the overcurrent is caused by a mechanical or an electrical abnormality by only displaying the overcurrent display section 314 on the monitoring screen 300 . However, in the present embodiment, the monitoring screen 300 includes an open-phase display section 318, and the open-phase display section 318 indicates an abnormality due to an open-phase. Therefore, the observer can determine from the overcurrent display section 314 and the open phase display section 318 that the abnormality is an electrical abnormality. As an electrical abnormality here, for example, failure or contact failure of any one of the thyristors 521, 522, 524, 525, 527, and 528 of each phase in the converter 520 is suspected.

15 to 17 show current value time-series data display sections 331, 332, and 333 displayed when the overcurrent display section 314 is selected on the monitoring screen 300 shown in FIG. All of the R-phase and S-phase current values 131 and 132 displayed in the current value time-series data display portions 331 and 332 shown in FIGS. 15 and 16 are below the current value threshold and are normal. However, the T-phase current value 133 shown in FIG. 17 sometimes exceeds the current value threshold value, which indicates an abnormality, that is, an overcurrent.

FIGS. 18 to 20 show current difference time-series data display sections 351, 352, and 353 displayed when the open phase display section 318 is selected on the monitoring screen 300 shown in FIG. The first current difference displayed on the first current difference time-series data display section 351 shown in FIG. 18 is generally within the normal range indicated by the lower limit threshold and the upper limit threshold, and is normal. On the other hand, the second current difference displayed in the second current difference time-series data display section 352 shown in FIG. 19 and the third current difference displayed in the third current difference time-series data display section 353 shown in FIG. , is below the lower threshold and is outside the normal range.

15 to 20, the observer who referred to the display units 331, 332, 333, 351, 352, and 353 had an electrical abnormality in which the R phase and the S phase were open-phased, and the T phase became overcurrent. can be determined to be This is because the T-phase current value 133 is overcurrent, the first current difference between the R-phase and S-phase is small, and the second current difference between the R-phase and T-phase and the third current difference between the S-phase and T-phase are This is because is large.

It should be noted that the embodiments disclosed this time should be considered as examples in all respects and not restrictive. The scope of the present invention is indicated by the scope of the claims rather than the meaning described above, and is intended to include meanings equivalent to the scope of the claims and all modifications within the scope.

10 motor monitoring device, 11 processing device, 12 memory, 13 database, 14 computer program, 15 communication interface, 30 user terminal, 51 first motor equipment, 53 second motor equipment, 55 third motor equipment, 57 fourth motor equipment , 70 network, 90 sensor data, 95 determination result, 100 monitoring process, 130 first sensor data, 131 R-phase current value, 132 S-phase current value, 133 T-phase current value, 135 second sensor data, 136 third sensor data, 137 fourth sensor data, 138 fifth sensor data, 139 sixth sensor data, 150 sensor data acquisition processing, 160 determination processing, 161A current value determination processing, 161B current difference determination processing, 162 vibration determination processing, 163 temperature determination Processing 164 Sound determination processing 165 Current determination processing 166 Switch connection determination processing 170 Generation processing 180 Monitoring screen output processing 200 Threshold adjustment processing 220 Threshold data 300 Monitoring screen 300A Monitoring screen information 301 First motor Equipment screen 302 Second motor equipment screen 303 Third motor equipment screen 304 Fourth motor equipment screen 311 Vibration display section (first display section) 312 Heat generation display section (second display section) 313 Abnormal sound display part (first display part; second display part), 314 overcurrent display part (first display part; second display part), 315 vibration display part (first display part), 316 switch display part (second display part ), 317 earth leakage display section (second display section), 318 open phase display section (second display section), 331 R-phase current value time-series data display section, 332 S-phase current value time-series data display section, 333 T-phase Current value time-series data display unit 351 First current difference time-series data display unit 352 Second current difference time-series data display unit 353 Third current difference time-series data display unit 501 Polyphase AC power supply 510 Motor circuit , 511 current sensor (AC sensor), 512 vibration sensor, 513 temperature sensor, 514 sound sensor, 515 leakage current sensor, 516 contact sensor, 517 inductor, 518 motor, 519 transmitter, 520 converter, 520A primary side, 520B secondary side, 521 thyristor, 522 thyristor, 524 thyristor, 525 thyristor, 527 thyristor, 528 thyristor.

Claims (15)

A process of acquiring sensor data output from a plurality of sensors for monitoring motor equipment in which mechanical and electrical anomalies may occur;
A first display unit indicating a first state of the motor equipment based on the sensor data, a second display unit indicating a second state of the motor equipment based on the sensor data, and a display unit indicating a second state of the motor equipment based on the sensor data a process of generating monitoring screen information configured to simultaneously display on the same screen a third display section showing the third state so as to be comparable ;
a process of displaying the monitoring screen information on a screen;
a processing unit configured to perform a monitoring process comprising
the first state is a state of the motor equipment caused only by the mechanical abnormality;
the second state is a state of the motor equipment caused only by the electrical abnormality;
the third state is a state of the motor equipment caused by the mechanical abnormality and the electrical abnormality;
The process of acquiring the sensor data includes sensors output from a plurality of sensors for measuring vibration of the motor equipment, a plurality of sensors for measuring temperature of the motor equipment, and a plurality of sensors for measuring sound of the motor equipment. Motor monitoring device including processing for acquiring data. 2. The motor monitoring device according to claim 1, wherein the process of acquiring the sensor data further includes a process of acquiring sensor data output from a plurality of current sensors for measuring motor current. 3. The monitoring screen information is configured to simultaneously display the first state, the second state, and the third state of each of the plurality of motor equipment on the same screen so as to be comparable . The motor monitoring device according to . A process of acquiring sensor data output from a plurality of sensors for monitoring motor equipment in which mechanical and electrical anomalies may occur;
A first display unit indicating a first state of the motor equipment based on the sensor data, a second display unit indicating a second state of the motor equipment based on the sensor data, and a display unit indicating a second state of the motor equipment based on the sensor data a process of generating monitoring screen information configured to simultaneously display on the same screen a third display section showing the third state so as to be comparable ;
a process of displaying the monitoring screen information on a screen;
a processing unit configured to perform a monitoring process comprising
the first state is a state of the motor equipment caused only by the mechanical abnormality;
the second state is a state of the motor equipment caused only by the electrical abnormality;
the third state is a state of the motor equipment caused by the mechanical abnormality and the electrical abnormality;
The motor monitoring device, wherein the monitoring screen information is configured to simultaneously display the first state, the second state, and the third state of each of a plurality of motor installations within the same screen so as to be comparable . The motor equipment includes a converter that converts a multiphase alternating current to a direct current, and a direct current motor that is driven by the direct current output from the converter,
5. Any one of claims 1 to 4, wherein the process of acquiring the sensor data includes a process of acquiring sensor data output from a plurality of alternating current sensors that measure the current of each phase in the multiphase alternating current. The motor monitoring device according to . 6. The motor monitoring device according to claim 5, wherein said second state includes a state of a current difference between at least two phases in said polyphase alternating current. The monitoring process further includes a current difference determination process for comparing the current difference and a current difference threshold value for determining an abnormality of the current difference,
The motor monitoring device according to claim 6, wherein the second display section is configured to display a result of the current difference determination process. The motor monitoring device according to claim 7, wherein the current difference threshold is set to be adjustable. The polyphase alternating current is an alternating current of three or more phases,
The monitoring process further comprises obtaining a current difference between each of a plurality of phases from the sensor data,
9. The motor monitoring device according to claim 7, wherein the second state indicated on the second display section is a maximum value among current differences between the plurality of phases. The motor monitoring device according to any one of claims 5 to 9 , wherein the first state includes a state of a current value of at least one phase in the polyphase alternating current. The monitoring process further comprises a current value determination process for comparing the current value and a current value threshold value for determining an abnormality of the current value,
The motor monitoring device according to claim 10 , wherein the first display section is configured to display a result of the current value determination process. The motor monitoring device according to claim 11 , wherein the threshold for current value is set to be adjustable. The monitoring process further comprises obtaining a phase with the largest current value in the multiphase alternating current,
12. The motor monitoring device according to claim 10 , wherein the first state displayed on the first display unit is the current value of the phase with the largest current value in the polyphase alternating current. A motor monitoring device acquires sensor data output from a plurality of sensors for monitoring motor equipment in which mechanical and electrical abnormalities may occur,
A first display unit indicating a first state of the motor equipment based on the sensor data, a second display unit indicating a second state of the motor equipment based on the sensor data, and a display unit indicating a second state of the motor equipment based on the sensor data The motor monitoring device generates monitoring screen information configured to simultaneously display a third display section showing a third state on the same screen so as to be comparable ,
causing the motor monitoring device to display the monitoring screen information on the screen;
the first state is a state of the motor equipment caused only by the mechanical abnormality;
the second state is a state of the motor equipment caused only by the electrical abnormality;
the third state is a state of the motor equipment caused by the mechanical abnormality and the electrical abnormality;
When the motor monitoring device acquires sensor data from a plurality of sensors measuring vibration of the motor equipment, a plurality of sensors measuring temperature of the motor equipment, and a plurality of sensors measuring sound of the motor equipment. A motor monitoring method that acquires output sensor data. A computer program for causing a computer to execute a monitoring process,
The monitoring process includes
A process of acquiring sensor data output from a plurality of sensors for monitoring motor equipment in which mechanical and electrical anomalies may occur;
A first display unit indicating a first state of the motor equipment based on the sensor data, a second display unit indicating a second state of the motor equipment based on the sensor data, and a display unit indicating a second state of the motor equipment based on the sensor data a process of generating monitoring screen information configured to simultaneously display on the same screen a third display section showing the third state so as to be comparable ;
a process of displaying the monitoring screen information on a screen;
with
the first state is a state of the motor equipment caused only by the mechanical abnormality;
the second state is a state of the motor equipment caused only by the electrical abnormality;
the third state is a state of the motor equipment caused by the mechanical abnormality and the electrical abnormality;
The process of acquiring the sensor data includes sensors output from a plurality of sensors for measuring vibration of the motor equipment, a plurality of sensors for measuring temperature of the motor equipment, and a plurality of sensors for measuring sound of the motor equipment. A computer program that includes a process of obtaining data.

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