CN111952936A - Motor protection control device based on power line carrier communication technology - Google Patents
Motor protection control device based on power line carrier communication technology Download PDFInfo
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- CN111952936A CN111952936A CN202010837196.5A CN202010837196A CN111952936A CN 111952936 A CN111952936 A CN 111952936A CN 202010837196 A CN202010837196 A CN 202010837196A CN 111952936 A CN111952936 A CN 111952936A
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- 238000004891 communication Methods 0.000 title claims abstract description 32
- 238000005516 engineering process Methods 0.000 title claims abstract description 22
- 238000012544 monitoring process Methods 0.000 claims abstract description 26
- 239000013078 crystal Substances 0.000 claims description 5
- 230000004048 modification Effects 0.000 abstract description 5
- 238000012986 modification Methods 0.000 abstract description 5
- 230000004044 response Effects 0.000 abstract description 3
- 238000004904 shortening Methods 0.000 abstract description 2
- 230000009471 action Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
- H02H7/0822—Integrated protection, motor control centres
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
- H02H7/0833—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors for electric motors with control arrangements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/54—Systems for transmission via power distribution lines
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Control Of Ac Motors In General (AREA)
Abstract
The invention discloses a motor protection control device based on a power line carrier communication technology. The device comprises a first carrier terminal and a second carrier terminal, wherein the acquisition terminal acquires the operating parameters of the motor, the first carrier terminal transmits the operating parameters to the second carrier terminal in a carrier mode, the second carrier terminal transmits the operating parameters to the motor monitoring module, when the operating parameters exceed a threshold value, the motor monitoring module outputs a control instruction to the first carrier terminal, and the first carrier terminal controls the motor to operate according to the control instruction. The invention adopts the scheme of carrying out carrier communication on the line, and can realize the control function which is not existed before without modifying the line when the technology is upgraded, thereby effectively saving the investment cost and the modification cost of equipment, greatly shortening the control response time of the motor, providing powerful guarantee for the safety of the motor, being also applied to corresponding control ends of a frequency converter and the like of the motor and having good compatibility.
Description
Technical Field
The invention relates to the technical field of motor protection control, in particular to a motor protection control device based on a power line carrier communication technology.
Background
The power carrier is a communication method specific to a power system, and is a technology for transmitting an analog or digital signal at a high speed by a carrier method using an existing power line, and the power carrier communication is used for controlling a motor, so that the convenience can be brought to the field of application of a plurality of motors. The power transmission line has high mechanical strength and good reliability, so that the communication mode is economical and stable. At present, most motors in China do not adopt a method of integrating monitoring and protection actions, but a monitoring device sends a signal to a terminal, and the signal is controlled by the terminal, or parameters are directly read on a motor monitoring screen and relevant operations are carried out, so that the requirement of automation is not met. For example, when a motor has a small fault which can be adjusted in time, the motor may be stopped, and a signal is received by the terminal and then an indication signal is sent to the action device, so that the action device cannot respond in time. In addition, the purpose can be achieved by additionally adding a communication line, but the cost is increased, and the modification of special occasions is difficult. The power carrier communication technology can utilize lower cost to carry out carrier communication on any phase power line of the motor, and signals are transmitted from the motor end to the control end and related protection actions are controlled, so that the aim of integrating monitoring and control is fulfilled.
Disclosure of Invention
The invention aims to provide a motor protection control device based on a power carrier communication technology, aiming at the defects in the prior art.
In order to achieve the above object, the present invention provides a motor protection control device based on power carrier communication technology, including a first carrier terminal and a second carrier terminal, where a first power line and a second power line are connected between the first carrier terminal and the second carrier terminal, the first carrier terminal is connected to a collection terminal, the collection terminal is used to collect operation parameters of a motor, the first carrier terminal is used to receive the operation parameters and send the operation parameters to the second carrier terminal through the first power line, the second carrier terminal is connected to a motor monitoring module to send the operation parameters to the motor monitoring module, when the operation parameters exceed a set threshold, the motor monitoring module outputs a control instruction, and the second carrier terminal sends the control instruction to the first carrier terminal through the second power line, and the first carrier terminal is connected with the motor control unit so as to control the motor to operate according to the control instruction.
Further, first carrier wave terminal and second carrier wave terminal include first carrier wave chip and second carrier wave chip respectively, first carrier wave chip is connected with the acquisition terminal, and it is connected with relay control circuit, relay control circuit is connected with motor control unit, second carrier wave chip is connected with motor monitoring module, and it is connected with first carrier wave chip through first power line and second power line.
Further, the first carrier chip and the second carrier chip are connected with a FLASH memory and a crystal oscillator circuit.
Furthermore, the first carrier chip and the second carrier chip are respectively connected with a power module, and the power module comprises a switch power supply and a voltage stabilizing chip connected with the switch power supply.
Further, the relay control circuit comprises a triode Q1 with an emitting electrode connected with the positive electrode of the power supply, the base electrode of the triode Q1 is connected with the second carrier chip, a relay is connected between the emitting electrode of the triode Q1 and the ground, and a normally open contact of the relay is connected with the motor control unit.
Furthermore, the first carrier chip and the second carrier chip are respectively connected with a reset chip.
Furthermore, the first carrier chip and the second carrier chip are respectively connected with a JTAG debug interface.
Furthermore, the models of the first carrier chip and the second carrier chip are both HT8550, and the model of the FLASH memory is W25Q80 DVSNIG.
Further, the operating parameters include voltage, current, temperature, and power factor.
Further, the first carrier chip and the acquisition terminal and the second carrier chip and the motor monitoring module are in communication connection through an SPI (serial peripheral interface) or an I2C interface or a serial port respectively.
Has the advantages that: the invention adopts the scheme of carrying out carrier communication on the line, and can realize the control function which is not existed before without modifying the line when the technology is upgraded, thereby effectively saving the equipment investment cost and the modification cost, greatly shortening the control response time of the motor, providing powerful guarantee for the safety of the motor, being also applied to corresponding control ends of a frequency converter and the like of the motor and having good compatibility.
Drawings
Fig. 1 is a schematic structural diagram of a motor protection control device based on a power carrier communication technology according to an embodiment of the invention;
FIG. 2 is a wiring schematic of a first carrier chip;
FIG. 3 is a circuit diagram of a power module of an embodiment of the invention;
fig. 4 is a circuit diagram of a relay control circuit according to an embodiment of the present invention.
Detailed Description
The present invention will be further illustrated with reference to the accompanying drawings and specific examples, which are carried out on the premise of the technical solution of the present invention, and it should be understood that these examples are only for illustrating the present invention and are not intended to limit the scope of the present invention.
As shown in fig. 1 to 4, an embodiment of the present invention provides a motor protection control device based on a power carrier communication technology, including a first carrier terminal 100 and a second carrier terminal 200, where a first power line 3 and a second power line 4 are connected between the first carrier terminal 100 and the second carrier terminal 200, the first carrier terminal 100 is connected with a collection terminal 5, the collection terminal 5 is existing, and the collection terminal 5 is used to collect operation parameters of a motor, where the operation parameters include, but are not limited to, voltage, current, temperature, and power factor. The first carrier wave terminal 100 is used for receiving the operation parameters of the motor collected by the collection terminal 5, the operation parameters of the motor are sent to the second carrier wave terminal 200 through the first power line 3, the second carrier wave terminal 200 is connected with the motor monitoring module 6, the operation parameters of the motor are sent to the motor monitoring module 6, the motor monitoring module 6 is used for monitoring the operation parameters of the motor, when the operation parameters of the motor exceed a set threshold value, the motor monitoring module 6 outputs a control instruction, the second carrier wave terminal 200 receives the control instruction output by the motor monitoring module 6, the control instruction is sent to the first carrier wave terminal 100 through the second power line 4, the first carrier wave terminal 100 is connected with the motor control unit 8, and then the motor is controlled to operate according to the control instruction.
The first carrier terminal 100 of the embodiment of the present invention includes a first carrier chip 1, the second carrier terminal 200 includes a second carrier chip 2, the first carrier chip 1 and the second carrier chip 2 are connected through a first power line 3 and a second power line 4, specifically, a carrier sending terminal signal OUT of the first carrier chip 1 is connected to a carrier receiving terminal signal IN of the second carrier chip 2 through the first power line 3, the carrier sending terminal signal OUT of the second carrier chip 2 is connected to the carrier receiving terminal signal IN of the first carrier chip 1 through the second power line 4, further, the carrier signals transmitted from the first carrier chip 1 and the second carrier chip 2 are received by the other party, and the first power line 3 and the second power line 4 may be power lines newly added at the time of installation, or may be any two power lines that are used conventionally.
Specifically, the first carrier chip 1 is connected to the acquisition terminal 5, the first carrier chip 1 is configured to receive the operation parameters of the motor acquired by the acquisition terminal 5 and send the operation parameters of the motor to the second carrier chip 2 through the first power line 3, the second carrier chip 2 is connected to the motor monitoring module 6, and the second carrier chip 2 sends the operation parameters of the motor to the motor monitoring module 6. When the operating parameters of the motor exceed the set threshold value, the control instruction output by the motor monitoring module 6 is received by the second carrier chip 2, the second carrier chip 2 sends the control instruction to the first carrier chip 1 through the second power line 4, the first carrier chip 1 is connected with the relay control circuit 7, the first carrier chip 1 controls the relay control circuit 7 to output a switching value control signal according to the received control instruction, the relay control circuit 7 is connected with the motor control unit 8, the switching value control signal is provided for the motor control unit 8, and then the motor is controlled to operate.
The first carrier chip 1 and the second carrier chip 2 of the embodiment of the invention are connected with a FLASH memory 9 and a crystal oscillator circuit 10. The crystal oscillator circuit 10 uses a 24Mhz passive crystal oscillator to perform external clock input to the chip, so as to provide a stable and high-speed system clock for the chip. The FLASH memory 9 is connected through the 4-line SPI, the communication speed is high, and the effective storage space reaches 8M. Furthermore, the first carrier chip 1 and the second carrier chip 2 may store, for example, an operation state of the motor, a received control command, operation information of the electromechanical control unit, and a time corresponding thereto in a predetermined manner.
The first carrier chip 1 and the second carrier chip 2 of the embodiment of the invention are respectively connected with a power module 11, and the power module 11 comprises a switching power supply U4 and a voltage stabilizing chip U5 connected with the switching power supply U4. The input voltage of the switching power supply U4 is preferably alternating current 90-265V, the power can be directly obtained from a power supply in a cabinet, and the output voltage of the switching power supply U4 is direct current 5V.
The relay control circuit 7 of the embodiment of the invention comprises a triode Q1 of which the emitting electrode is connected with the positive electrode of a power supply, the base electrode of the triode Q1 is connected with the second carrier chip 2, a relay is connected between the emitting electrode and the ground, and a normally open contact of the relay is connected with the motor control unit 8. The working principle is explained by taking the control motor to stop as an example, when the voltage, the current or the temperature of the motor is monitored to exceed the threshold value, the motor monitoring module 6 outputs a stop instruction, when the second carrier chip 2 receives the stop instruction, the Ctrl IO through the second carrier chip 2 outputs a high level signal, thereby the control triode Q1 is switched on, the relay is powered on, the normally open contact of the relay is closed, a switching value signal is provided to the motor control unit 8, the control contactor of the motor is controlled to be powered off or the breaker is disconnected, further the motor is controlled to stop, the operation of quick response is achieved, the switching value signal output by the relay can also be simultaneously provided to the alarm module, and when the motor is controlled to stop, the alarm is output. It should be noted that the control command of the embodiment of the present invention is not limited to the stop control, and other motor control variables are controlled by a similar method, such as providing the switching value signal output by the relay to the frequency converter controlling the motor to realize the speed control of the motor.
The first carrier chip 1 and the second carrier chip 2 of the embodiment of the present invention are respectively connected to a reset chip 12. VDD and VSS of the reset chip 12 are connected to a positive electrode and a negative electrode connected out of the power module, the working condition of the power supply is monitored by an RC circuit, the reset operation is started through a determined voltage value (threshold value), meanwhile, the influence of transient interference is eliminated, misoperation of the chip during the starting and the closing of the power supply is prevented, and data safety is guaranteed.
The first carrier chip 1 and the second carrier chip 2 of the embodiment of the invention are respectively connected with a JTAG debugging interface 13, and download programs or debug through the JTAG debugging interface 13.
The models of the first carrier chip 1 and the second carrier chip 2 in the embodiment of the present invention are preferably HT 8550. The power line data communication with low power consumption, high sensitivity and high interference resistance can be provided.
In the embodiment of the invention, the first carrier chip 1 and the acquisition terminal 5 are preferably in communication connection through an SPI (serial peripheral interface) or an I2C interface or a serial port, and the second carrier chip 2 and the motor monitoring module 6 are preferably in communication connection through an SPI or an I2C interface or a serial port.
Fig. 2 illustrates a specific connection relationship between the first carrier chip 1 and other components, where U1 is the first carrier chip, U2 is a FLASH memory, U3 is a reset chip, and U4 is a JTAG debug interface. Note that, since the second carrier chip 2 lacks only an output connection with the relay control circuit 7 as compared with the first carrier chip 1, a wiring diagram of the second carrier chip is not provided.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that other parts not specifically described are within the prior art or common general knowledge to those of ordinary skill in the art. Without departing from the principle of the invention, several improvements and modifications can be made, and these improvements and modifications should also be construed as the scope of the invention.
Claims (10)
1. A motor protection control device based on a power carrier communication technology is characterized by comprising a first carrier terminal and a second carrier terminal, wherein a first power line and a second power line are connected between the first carrier terminal and the second carrier terminal, the first carrier terminal is connected with a collection terminal, the collection terminal is used for collecting operating parameters of a motor, the first carrier terminal is used for receiving the operating parameters and sending the operating parameters to the second carrier terminal through the first power line, the second carrier terminal is connected with a motor monitoring module so as to send the operating parameters to the motor monitoring module, when the operating parameters exceed a set threshold value, the motor monitoring module outputs a control instruction, and the second carrier terminal sends the control instruction to the first carrier terminal through the second power line, and the first carrier terminal is connected with the motor control unit so as to control the motor to operate according to the control instruction.
2. The motor protection control device based on the power carrier communication technology as claimed in claim 1, wherein the first carrier terminal and the second carrier terminal respectively include a first carrier chip and a second carrier chip, the first carrier chip is connected to the collection terminal and connected to a relay control circuit, the relay control circuit is connected to the motor control unit, the second carrier chip is connected to the motor monitoring module and connected to the first carrier chip through a first power line and a second power line.
3. The motor protection control device based on the power carrier communication technology according to claim 2, wherein a FLASH memory and a crystal oscillator circuit are connected to the first carrier chip and the second carrier chip.
4. The motor protection control device based on the power carrier communication technology as claimed in claim 2, wherein a power module is connected to each of the first carrier chip and the second carrier chip, and the power module includes a switching power supply and a voltage regulation chip connected to the switching power supply.
5. The motor protection control device based on the power carrier communication technology as claimed in claim 2, wherein the relay control circuit comprises a triode Q1 with an emitter connected with the positive electrode of the power supply, the base of the triode Q1 is connected with the second carrier chip, a relay is connected between the emitter and the ground, and a normally open contact of the relay is connected with the motor control unit.
6. The motor protection control device based on the power carrier communication technology according to claim 2, wherein a reset chip is connected to each of the first carrier chip and the second carrier chip.
7. The motor protection control device based on power carrier communication technology of claim 2, wherein the first carrier chip and the second carrier chip are respectively connected with a JTAG debug interface.
8. The motor protection control device based on the power carrier communication technology as claimed in claim 3, wherein the first carrier chip and the second carrier chip are both HT8550, and the FLASH memory is W25Q80 DVSNIG.
9. The power-carrier communication technology-based motor protection control device according to claim 1, wherein the operating parameters include voltage, current, temperature, and power factor.
10. The motor protection control device based on the power carrier communication technology of claim 2, wherein the first carrier chip and the collection terminal and the second carrier chip and the motor monitoring module are respectively connected through an SPI interface, an I2C interface or a serial port in a communication manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010837196.5A CN111952936A (en) | 2020-08-19 | 2020-08-19 | Motor protection control device based on power line carrier communication technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010837196.5A CN111952936A (en) | 2020-08-19 | 2020-08-19 | Motor protection control device based on power line carrier communication technology |
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| Publication Number | Publication Date |
|---|---|
| CN111952936A true CN111952936A (en) | 2020-11-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010837196.5A Pending CN111952936A (en) | 2020-08-19 | 2020-08-19 | Motor protection control device based on power line carrier communication technology |
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| CN (1) | CN111952936A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107341954A (en) * | 2017-07-27 | 2017-11-10 | 北京无线电测量研究所 | A kind of monitoring method and system based on power carrier |
| CN206775117U (en) * | 2017-04-27 | 2017-12-19 | 国网安徽省电力公司芜湖供电公司 | A kind of taiwan area anti-islanding protection system based on low pressure carrier wave |
-
2020
- 2020-08-19 CN CN202010837196.5A patent/CN111952936A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206775117U (en) * | 2017-04-27 | 2017-12-19 | 国网安徽省电力公司芜湖供电公司 | A kind of taiwan area anti-islanding protection system based on low pressure carrier wave |
| CN107341954A (en) * | 2017-07-27 | 2017-11-10 | 北京无线电测量研究所 | A kind of monitoring method and system based on power carrier |
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Application publication date: 20201117 |
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| RJ01 | Rejection of invention patent application after publication |