CN211046462U - Non-electric quantity protection device for high-voltage motor - Google Patents
Non-electric quantity protection device for high-voltage motor Download PDFInfo
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- CN211046462U CN211046462U CN201922029022.1U CN201922029022U CN211046462U CN 211046462 U CN211046462 U CN 211046462U CN 201922029022 U CN201922029022 U CN 201922029022U CN 211046462 U CN211046462 U CN 211046462U
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- voltage motor
- main control
- control module
- electric quantity
- monitoring
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Abstract
The utility model discloses a high-voltage motor non-electric quantity protection device, which comprises a main control module, a monitoring module, a switch circuit and a display module; the monitoring module comprises a temperature monitoring unit, a tension deformation monitoring unit and a noise monitoring unit; the monitoring module sends the measured non-electric quantity signal to the main control module, the main control module gives an alarm through the switch circuit to cut off the high-voltage motor in time, and the fault type is displayed through the display module. The non-electric quantity change of the high-voltage motor is monitored in real time, the motor fault and the potential fault can be timely found and solved through the variable, the fault type is judged, meanwhile, a corresponding alarm signal is sent, the high-voltage motor is cut off when the fault is serious, and loss and damage expansion are reduced; the high-voltage motor can be protected rapidly and accurately in all directions, the service life of the high-voltage motor is prolonged, the monitoring sensitivity and accuracy are improved, the accident rate is reduced, and the production is effectively guaranteed.
Description
Technical Field
The utility model relates to a motor safety arrangement especially relates to a non-electric quantity protection device of high-voltage motor.
Background
The high-voltage motor occupies an important position in the production of industrial enterprises, and the safe operation of the high-voltage motor plays a decisive role in ensuring the normal work and the electric energy quality of a system. Meanwhile, the motor is a very valuable electronic device, and if a fault occurs, the economic benefit of an enterprise is greatly lost, and the normal production of the device is influenced. Therefore, it is necessary to design a safe and reliable protection device with good performance for the high voltage motor.
The fault of the high-voltage motor can bring serious influence to the production and the life of enterprises, and once a problem occurs, the safe and stable operation of the system can be influenced. In recent years, many high-voltage motor faults occur, and most of the faults are caused by insufficient protection.
The electric quantity protection of the high-voltage motor, such as differential protection, low-voltage protection, overcurrent protection and the like, has poor anti-interference capability and low sensitivity, is difficult to realize simultaneous monitoring of a plurality of signals, and has dangerous hidden danger. High voltage motor non-charge protection has not been a primary level of concern for a long time.
SUMMERY OF THE UTILITY MODEL
Utility model purpose: in order to solve the problems existing in the prior art, the utility model provides a high-voltage motor non-electric quantity protection device with strong anti-interference capability and high sensitivity.
The technical scheme is as follows: a high-voltage motor non-electric quantity protection device comprises a main control module, a monitoring module, a switch circuit and a display module; the monitoring module comprises a temperature monitoring unit, a tension deformation monitoring unit, a noise monitoring unit and a gas monitor, the monitoring module sends a measured non-electric quantity signal to the main control module, and the main control module gives an alarm to cut off the high-voltage motor through the switch circuit and displays a fault type through the display module.
The main control module is connected with an alarm circuit; the alarm circuit comprises a light emitting diode, a triode and a buzzer; the triode is controlled by the main control module to carry out switching state conversion; the P1.6 and P1.7 pins of the main control module respectively control the working states of the buzzer and the diode.
The monitoring module comprises a temperature monitoring unit, a tension deformation monitoring unit, a noise monitoring unit and a gas monitor and is used for monitoring non-electric quantity parameters of the high-voltage motor; the monitoring module sends the measured non-electric quantity signal to the main control module, the main control module gives an alarm through the switch circuit to cut off the high-voltage motor in time, and the fault type is displayed through the display module.
The temperature monitoring unit comprises three-phase temperature sensors and an ambient temperature sensor, wherein the three-phase temperature sensors are respectively arranged on the A, B and C three-phase windings of the high-voltage motor, and the ambient temperature sensor is used for monitoring the ambient temperature. When the temperature rises when a fault occurs inside the high-voltage motor, the temperature sensor can monitor the temperature change in real time and predict the temperature change trend, and the main control module judges the fault type and timely alarms and cuts off the high-voltage motor.
The tension deformation monitoring unit comprises a tension deformation sensor arranged on a winding iron core of the high-voltage motor. When a fault occurs in the high-voltage motor, the expansion tension of the iron core is increased due to temperature rise, the deformation sensor can monitor tension change in real time and predict the change trend at the same time, the tension change rate is calculated through the main control module, and the fault type is judged.
The monitoring module further comprises a noise monitoring unit arranged on the wall of the high-voltage motor box, the noise monitoring unit monitors the noise emitted by the high-voltage motor body in real time, and the noise monitoring unit is controlled by the main control module. The starting state, normal operation and the noise frequency generated when the motor is in failure are different, and when the noise change exceeds the conventional standard, a corresponding alarm circuit can be triggered to remind a worker.
The monitoring module also comprises a gas monitor arranged on the wall of the high-voltage motor box, and the gas monitor is controlled by the main control module. The fault state of the high-voltage motor can give out CH4、CO、SO2And the like; the gas monitor determines whether the high-voltage motor has a fault by monitoring the gas concentration.
Furthermore, the high-voltage motor non-electric quantity protection device also comprises a touch screen, and the touch screen is connected with the main control module; the main control module is connected with a computer, and the touch screen is connected with the computer.
Furthermore, the high-voltage motor non-electric quantity protection device also comprises a communication module and mobile monitoring equipment; the main control module sends a monitoring signal to the mobile monitoring equipment through the communication module.
Has the advantages that: compared with the prior art, the utility model, can the non-electric quantity of real-time supervision high-voltage motor change, in time discover and solve motor trouble or latent fault through the variable, send corresponding alarm signal and cut off high-voltage motor when serious when judging the fault type, reduce the loss, reduce harm. The non-electric quantity signals of a plurality of high-voltage motors can be monitored simultaneously, and the high-voltage motors are protected comprehensively, accurately and rapidly by combining a touch screen, a computer, GPRS communication, a mobile phone display module, an alarm module and the like, so that the service life of the high-voltage motors is prolonged. The sensitivity and the accuracy of monitoring are improved, the accident rate is greatly reduced, and the production is effectively guaranteed.
Drawings
FIG. 1 is a block diagram of the working principle of the present invention;
fig. 2 is a schematic circuit diagram of the main control module of the present invention;
FIG. 3 is a diagram of an alarm circuit of the present invention;
fig. 4 shows the temperature sensor switching circuit of the present invention.
Detailed Description
The technical solution of the present invention is further explained with reference to the drawings and the specific embodiments of the specification.
As shown in fig. 1, the non-electric quantity protection device for the high-voltage motor of the present invention comprises a main control module, various monitoring modules, a switch circuit and an auxiliary display device; the monitoring module is used for monitoring the temperature, tension deformation, noise, gas concentration and other non-electric quantities of the high-voltage motor and comprises a temperature monitoring unit, a tension deformation monitoring unit, a noise monitoring unit and a gas concentration monitoring unit; the auxiliary display equipment comprises a touch screen, a computer, GPRS communication, a mobile phone display end, a remote secondary instrument and the like.
As shown in fig. 2, the main control module is an STC51 single chip microcomputer; the analog-to-digital conversion module utilizes the internal A/D conversion function of the STC51 single chip microcomputer.
As shown in fig. 3, the alarm circuit is composed of a light emitting diode and a triode connected with a buzzer, the switching of the working state of the triode in the alarm circuit is controlled by an STC51 single chip microcomputer, and the switching of the on-off state is realized by the control of a main control module; the pins P1.6 and P1.7 of the main control module are respectively used for controlling the working states of the buzzer and the diode. When one or more variables of the monitored temperature, tension, noise, gas concentration and the like exceed the normal working range, corresponding light emitting diodes of the temperature, the pressure, the noise, the gas concentration and the like can be lightened respectively, fault points can be judged through the specifically lightened diodes, and meanwhile, the main control module can drive a buzzer commonly used by the main control module to realize the alarm function.
As shown in fig. 4, the temperature sensor resistance-voltage conversion circuit uses the temperature of the temperature resistor Pt100 and the approximately linear change in the resistance value thereof, and eliminates the influence of the contact resistance and the lead resistance by using the three-wire method. Wherein R3, R4 and R5 are equivalent resistances of 3 leads. After the resistance signal is amplified by the amplifying circuit and filtered, the resistance signal can be converted into a voltage signal which is transmitted to the main control chip.
The temperature monitoring unit is a temperature sensor which is respectively arranged on the A, B and C three-phase windings of the high-voltage motor, a temperature sensor which is specially used for monitoring the environmental temperature, and the temperature monitoring unit comprises four temperature sensors which are respectively used for carrying out necessary signal amplification and carrying out A/D conversion and memory in the main control module. The temperature sensor measures a signal, if the electric quantity signal is small, the signal is amplified by the amplifying circuit and then transmitted to the single chip microcomputer A/D conversion I/O port, binary data information is obtained by the aid of an analog-to-digital conversion function of the single chip microcomputer, data processing is carried out, and real-time temperature monitoring is achieved. When the temperature is obtained, the temperature is compared with the temperature in a normal range, when the temperature of the high-voltage motor rises, the corresponding light-emitting diode is turned on, and the buzzer is turned on to give an alarm; if the temperature difference is too large while alarming, the temperature switch, namely the relay, can act to realize over-temperature protection and cut off the high-voltage motor.
Meanwhile, the single chip microcomputer obtains the temperature rise rate dT/dT through timing calculation, whether normal temperature rise exists or not can be judged according to the temperature rise rates of the three-phase winding and the environment, if the temperature rise exists, the fault type, the single-phase short-circuit fault, the two-phase short-circuit fault, the three-phase short-circuit fault and the like of the high-voltage motor can be judged according to the four temperature change rates, and real-time monitoring of the temperature change rate and the specific fault type is achieved.
The tension protection utilizes a tension deformation sensor to monitor, also performs signal amplification by a necessary amplifying circuit, and then converts and memorizes the signals in the main control module. The acquisition of tension deformation is synchronous with temperature, a tension deformation sensor is used for monitoring the tension change of a winding and predicting the change trend, signal monitoring is carried out, real-time monitoring of the tension change is realized, the real-time monitoring is the same as the temperature strategy, and the same buzzer is adopted for alarm and over-temperature alarm, but different lamps are lighted. And the high-voltage motor is cut off to protect the motor while alarming. Meanwhile, the tension change rate can be calculated, and the fault type of the high-voltage motor can be judged.
The utility model discloses non-electric quantity protection device of high voltage motor still includes the noise measurement unit, and the noise monitoring unit utilizes sound sensor, can monitor the sound frequency, directly transmits for main control chip, carries out AD conversion and preserves. A noise sensor is adopted to monitor noise signals, the noise signals are converted into electric signals after filtering and amplification and transmitted to an A/D conversion I/O port of a single chip microcomputer, noise is monitored in real time and compared with noise in normal operation, and an alarm circuit is conducted to give an alarm when the noise signals are abnormal.
The utility model discloses the non-electric quantity protection device of high-voltage motor still includes one and installs the gas monitor on installing the high-voltage motor tank wall, by host system control. The fault state of the high-voltage motor can give out CH4、CO、SO2And the like; the gas monitor determines whether the motor is malfunctioning by monitoring the gas concentration.
The main control module is used for storing and accessing data, processing and calculating the change rate, and matching with corresponding external modules such as a GPRS mobile phone display module, a touch screen, a computer and the like, so that the fault and non-fault of the high-voltage motor can be accurately judged, and the fault can be timely removed through a switch circuit, so that the function of protecting the motor through non-electric quantity is achieved. In addition, the data corresponding to each protection module can be connected to the mobile phone through the wireless communication module to carry out data transmission and realize the function of real-time monitoring.
Claims (9)
1. A high-voltage motor non-electric quantity protection device comprises a main control module, a monitoring module, a switch circuit and a display module; the method is characterized in that: the monitoring module comprises a temperature monitoring unit, a tension deformation monitoring unit, a noise monitoring unit and a gas monitor, the monitoring module sends a measured non-electric quantity signal to the main control module, and the main control module gives an alarm to cut off the high-voltage motor through the switch circuit and displays a fault type through the display module.
2. The non-electric quantity protection device of the high-voltage motor according to claim 1, characterized in that: the temperature monitoring unit comprises a three-phase temperature sensor and an environment temperature sensor, and the main control module judges the fault type and timely alarms and cuts off the high-voltage motor.
3. The non-electric quantity protection device of the high-voltage motor according to claim 1, characterized in that: and a tension deformation sensor is arranged in the tension deformation monitoring unit.
4. The non-electric quantity protection device of the high-voltage motor according to claim 1, characterized in that: the noise monitoring unit is controlled by the main control module and monitors the noise emitted by the high-voltage motor body in real time; when the noise changes over the conventional standard, the staff is reminded by triggering the corresponding alarm circuit.
5. The non-electric quantity protection device of the high-voltage motor according to claim 1, characterized in that: the gas monitor is controlled by a main control module; the fault state of the high-voltage motor can give out CH4、CO、SO2And the gas monitor judges whether the high-voltage motor fails or not by monitoring the gas concentration.
6. The non-electric quantity protection device of the high-voltage motor according to claim 1, characterized in that: the main control module is connected with an alarm circuit.
7. The non-electric quantity protection device of the high-voltage motor according to claim 6, characterized in that: the alarm circuit comprises a light emitting diode, a triode and a buzzer; the triode is controlled by the main control module to switch states, and pins P1.6 and P1.7 of the main control module are respectively used for controlling the working states of the buzzer and the diode.
8. The non-electric quantity protection device of the high-voltage motor according to claim 1, characterized in that: the touch screen is connected with the main control module; the main control module is connected with a computer, and the touch screen is connected with the computer.
9. The non-electric quantity protection device of the high-voltage motor according to claim 1, characterized in that: the main control module sends the monitoring signals to the mobile monitoring equipment through the communication module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922029022.1U CN211046462U (en) | 2019-11-22 | 2019-11-22 | Non-electric quantity protection device for high-voltage motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922029022.1U CN211046462U (en) | 2019-11-22 | 2019-11-22 | Non-electric quantity protection device for high-voltage motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211046462U true CN211046462U (en) | 2020-07-17 |
Family
ID=71533219
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922029022.1U Expired - Fee Related CN211046462U (en) | 2019-11-22 | 2019-11-22 | Non-electric quantity protection device for high-voltage motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211046462U (en) |
-
2019
- 2019-11-22 CN CN201922029022.1U patent/CN211046462U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200717 Termination date: 20201122 |