# US 2025/0093418 A1 · Motor malfunction monitoring device, drive motor system and motor malfunction monitoring method

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- Number: US 2025/0093418 A1
- Document ID: US20250093418A1
- Status: Published application
- Kind: A1
- Application number: 18/962,928
- Filed: 2024-11-27
- Published: 2025-03-20
- Earliest claimed: 2020-11-13
- Assignees: Yantai Jereh Petroleum Equipment & Technologies Co., Ltd.
- Applicants: Yantai Jereh Petroleum Equipment & Technologies Co., Ltd.
- Inventors: Kaishen LIU; Shouzhe LI; Haiping XING; Zhuqing MAO; Weiwei LIU; Liang LI; Dawei ZHAO; Jun ZHANG
- Web page: https://patentgrep.com/patent/US20250093418A1

## CPC

- G01R 31/343: {in operation}
- E21B 41/00: Equipment or details not covered by groups E21B15/00 - E21B40/00
- G08B 21/185: {Electrical failure alarms}
- H02P 29/024: Detecting a fault condition, e.g. short circuit, locked rotor, open circuit or loss of load
- G01R: MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES (indicating correct tuning of resonant circuits H03J3/12)
- E21B: EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- G08B: SIGNALLING SYSTEMS, e.g. PERSONAL CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- H02P: CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS

## Abstract

A motor malfunction monitoring device for monitoring a malfunction of a drive motor, includes: vibration sensors for detecting for one or more components of the drive motor transverse vibration in a direction parallel to a mounting plane of the drive motor and perpendicular to a longitudinal direction of the drive motor or longitudinal vibration in a direction perpendicular to both the mounting plane and the longitudinal direction of the drive motor; a voltage sensor for detecting a voltage of the drive motor or a current sensor for detecting a current of the drive motor; and a data storage storing a database of normal operation spectrums of one of the transverse vibration or the longitudinal vibration during a normal operation of the drive motor, and of one of the voltage or the current during a normal operation of the drive motor.

## Claims

### Claim 1

A motor malfunction monitoring device for detecting malfunction in a drive motor, comprising:
vibration sensors for detecting vibration in a component of the drive motor in a first direction and a second direction, wherein the first direction is substantially perpendicular to the second direction;
a voltage sensor for detecting a voltage of the drive motor or a current sensor for detecting a current of the drive motor; and
a data storage storing a database comprising normal operation spectrums of vibration during normal operation of the drive motor, and the voltage or the current during normal operation of the drive motor; and
wherein the motor malfunction monitoring device is configured to acquire operation data of the drive motor, extract operation data spectrums from the operation data, compare the operation data spectrums with corresponding normal operation spectrums to obtain a similarity, and when the similarity is lower than a predetermined threshold, determine that the drive motor is malfunctioning.

### Claim 2 (depends on 1)

The motor malfunction monitoring device according to claim 1, wherein the data storage is updated with the operation data spectrums of the drive motor.

### Claim 3 (depends on 2)

The motor malfunction monitoring device according to claim 2, wherein the data storage expands the database with the operation data spectrums of normal operational drive motor, and expands the database with the operation data spectrums of malfunctioning drive motor.

### Claim 4 (depends on 1)

The motor malfunction monitoring device according to claim 1, wherein the motor malfunction monitoring device comprises an alarm device, wherein the alarm device sends out an alarm when the motor malfunction monitoring device determines that the drive motor is malfunctioning.

### Claim 5 (depends on 2)

The motor malfunction monitoring device according to claim 2, wherein the motor malfunction monitoring device comprises an alarm device, wherein the alarm device sends out an alarm when the motor malfunction monitoring device determines that the drive motor is malfunctioning.

### Claim 6 (depends on 3)

The motor malfunction monitoring device according to claim 3, wherein the motor malfunction monitoring device comprises an alarm device, wherein the alarm device sends out an alarm when the motor malfunction monitoring device determines that the drive motor is malfunctioning.

### Claim 7 (depends on 1)

The motor malfunction monitoring device according to claim 1, wherein the component to be detected is a bearing or a base of the drive motor.

### Claim 8 (depends on 1)

A drive motor system comprising: a drive motor, a variable frequency drive for regulating an input current to the drive motor, and the motor malfunction monitoring device according to claim 1, wherein variable frequency drive regulates the input current to the drive motor based on a determining result of the motor malfunction monitoring device.

### Claim 9 (depends on 8)

The drive motor system according to claim 8, wherein the variable frequency drive cuts off the input current when the motor malfunction monitoring device determines that the drive motor is malfunctioning.

### Claim 10 (depends on 8)

The drive motor system according to claim 8, wherein the data storage is updated with the operation data spectrums of the drive motor.

### Claim 11 (depends on 10)

The drive motor system according to claim 10, wherein the data storage expands the database with the operation data spectrums of normal operational drive motor, and expands the database with the operation data spectrums of malfunctioning drive motor.

### Claim 12 (depends on 8)

The drive motor system according to claim 8, wherein the motor malfunction monitoring device comprises an alarm device, wherein the alarm device sends out an alarm when the motor malfunction monitoring device determines that the drive motor is malfunctioning.

### Claim 13 (depends on 9)

The drive motor system according to claim 9, wherein the motor malfunction monitoring device comprises an alarm device, wherein the alarm device sends out an alarm when the motor malfunction monitoring device determines that the drive motor is malfunctioning.

### Claim 14 (depends on 10)

The drive motor system according to claim 10, wherein the motor malfunction monitoring device comprises an alarm device, wherein the alarm device sends out an alarm when the motor malfunction monitoring device determines that the drive motor is malfunctioning.

### Claim 15 (depends on 8)

The drive motor system according to claim 8, wherein the one or more components to be detected comprise bearings and bases of the drive motor.

### Claim 16

A method for monitoring malfunction in a drive motor, comprising:
pre-storing a first database of normal operation spectrums obtained during normal operation of the drive motor;
detecting vibration in one or more components of the drive motor in a first direction and a second direction;
detecting a voltage or a current of the drive motor;
acquiring operation data of the drive motor, wherein the operation data comprises a vibration signal, and at least one of a voltage signal and a current signal;
extracting operation data spectrums from the operation data; and
comparing the operation data spectrums with normal operation spectrums in the first database to obtain a similarity, when the similarity is lower than a predetermined threshold, determining that the drive motor is malfunctioning; and
when determining that the drive motor is malfunctioning, comparing the operation data spectrums with known malfunction spectrums stored in a second database comprising known malfunction spectrums of different types of malfunctions of the drive motor, and determining a malfunction type of the drive motor.

### Claim 17 (depends on 16)

The method according to claim 16, further comprising: storing the operation data spectrums of the drive motor.

### Claim 18 (depends on 17)

The method according to claim 17, further comprising: expanding the first database with the operation data spectrums of normal operational drive motor, and expanding the second database with the operation data spectrums of malfunctioning drive motor.