CN106300264B - Submersible motor protector - Google Patents
Submersible motor protector Download PDFInfo
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- CN106300264B CN106300264B CN201610718550.6A CN201610718550A CN106300264B CN 106300264 B CN106300264 B CN 106300264B CN 201610718550 A CN201610718550 A CN 201610718550A CN 106300264 B CN106300264 B CN 106300264B
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- 230000001012 protector Effects 0.000 title claims abstract description 29
- 238000004891 communication Methods 0.000 claims abstract description 96
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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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- Control Of Ac Motors In General (AREA)
Abstract
The present invention provides a kind of submersible motor protectors; it is related to the technical field of submersible motor protection; directly setting number adopts plate at underwater submersible motor; the number adopts the need physical index data to be protected that plate measures submersible motor; and these physical index data are uploaded to by serial ports the master control borad of the water surface or more; the physical index data that master control borad is obtained according to it judge whether to send out alarm signal or cut off the power supply of submersible motor, to play the purpose of protection submersible motor；The number is adopted the communication between plate and master control borad and is carried out by the way of power carrier modulation；It is microcontroller that the number, which adopts plate and the control core of master control borad,.
Description
Technical field
The present invention provides a kind of submersible motor protector, is related to the technical field of submersible motor protection.
Background technology
Submersible motor is widely used, but due to environmental work under water, easily damaged, protection difficulty is big, so diving
The protection technique of motor becomes the important technical for reducing submersible motor damage.
Existing submersible motor protector is used is arranged posive temperature coefficient thermistor PTC and leak electricity in submersible motor
The excessively high sensing element with leak of temperature that pole is popped one's head in respectively as submersible motor, posive temperature coefficient thermistor PTC are opposite
In temperature switch, the interior setting leak float of submersible motor also having is to detect whether leak, these sensing elements are respectively by leading
Line is connected in the submersible motor protector of the water surface or more, by the submersible motor protector according to the response feelings of these sensing elements
Condition decides whether to send out alarm signal or cuts off the power supply of submersible motor.
The physical index of existing submersible motor protector detection is few, so the protection project being capable of providing is few, also
It is there is protection blind area for submersible motor.
Each sensing element of existing submersible motor protector is connected to the diving electricity of the water surface or more by conducting wire respectively
In machine protector, the usage amount of conducting wire is big, and investment is high, and invests and can rapidly increase with the increase youngster of conducting wire radical or conductor length
Add, nevertheless, when submersible motor depths under water tens of rice even hundreds of meters when, existing submersible motor protector at all cannot
Meet the requirement of protection.
Existing submersible motor protector function is very simple, be not easy to function extension and with digital automation equipment
Interconnection.
Invention content
According to the above-mentioned deficiencies of the prior art, the technical problem to be solved by the present invention is to：A kind of no protection blind area of offer,
Digital automation submersible motor protector more than small investment and function etc..
Scheme is used by the present invention solves its technical problem：Number is directly set at the underwater submersible motor of the present invention
Plate is adopted, which adopts plate and measure the need physical index data to be protected of submersible motor, and these physical index data are led to
The master control borad that serial ports is uploaded to the water surface or more is crossed, the physical index data that master control borad is obtained according to it judge whether to send out report
Alert signal or the power supply for cutting off submersible motor, to play the purpose of protection submersible motor；The number adopts plate and master control borad
Between communication using power carrier modulate by the way of carry out；It is microcontroller that the number, which adopts plate and the control core of master control borad,.
The present invention provides a kind of submersible motor protectors, including number to adopt plate and master control borad, and the number adopts plate and diving electricity
Machine exists together under water, and the number adopts plate and is mounted on the outside of submersible motor outer wall, and impose water-proof thermal insulation material and motor outer wall or
External world's isolation, the number adopts the physical index in plate detection submersible motor operational process, and testing result is uploaded to master control
Plate, the master control borad provide power supply by DC power source adapter, are adopted in number and DC power supply is arranged on plate, direct current supply electricity
Source is transformed to the single-phase AC voltage provided between the firewire L and zero curve N of power supply system to stablize accurate DC power supply
Voltage adopts the supply voltage of plate as number, and the number, which is adopted, to be connected between plate and master control borad using conducting wire LA and zero curve N, using one
Root cable connection to underwater submersible motor sum number adopts plate.
Trap is installed between the conducting wire LA and the firewire L of power supply system, which is low-pass filtering
Device, which allows power frequency ac voltage to pass through, and is impermissible for high-frequency voltage signal and passes through, so that number adopts plate and master control
The signal of communication of plate will not influence normal communication between the two by system impedance short circuit, while will not be let out to power supply system
Reveal high-frequency signal and interferes.
The firewire L and zero curve N of the power supply system are power input ends, and conducting wire LA and zero curve N are power output ends.
The underwater submersible motor sum number adopts plate using equipment more than cable connection to the water surface, in the cable
Core includes the conducting wire LA, zero curve N and the power cord of submersible motor and the protective wire of submersible motor, the conducting wire LA and zero
Line N is that number adopts the power supply line that the communication line sum number between plate and master control borad adopts plate.
The communications adopted between plate and master control borad of number are carried out using carrier modulation by the way of, with overcome serious electric power interfere with
Meet the accuracy stability of signal transmission.
It is set with current transformer in the phase line of conducting wire on the water, the current signal of the current transformer inputs master control
Plate, to realize the current protection to submersible motor.
The number adopts temperature parameter, leak state parameter, exsiccosis parameter and the electric moter voltage of plate detection submersible motor
The physical indexs such as parameter, wherein the temperature parameter of detection submersible motor includes the winding temperature parameter of submersible motor, upper bearing (metal)
Temperature parameter and lower bearing temperature parameter, the leak state parameter for detecting submersible motor include the grease chamber leak state of submersible motor
Parameter, submersible motor cavity of resorption leak state parameter and submersible motor wire connection cavity leak state parameter, detection submersible motor voltage ginseng
Number is derived from the connecting position of wires of the wire connection cavity of submersible motor.
The master control borad, DC power source adapter, trap and current transformer are mounted in control room or control cabinet, and
It does not reside at underwater.
The physical index data that the master control borad is obtained according to it judge whether to send out alarm signal or cut-out diving
The power supply of motor, to play the purpose of protection submersible motor.
The firewire L and zero curve N of one end connection power supply system of the trap, other end connecting wire LA and zero curve
One end of N, fuse FU0 connect firewire L, and the other end connects one end of varistor RY0, resistance R0, capacitance C0 and inductance L0,
Varistor RY0, resistance R0 and the other end of capacitance C0 connect zero curve N, the other end connecting wire LA of inductance L0.
The number adopts core element of the plate using microcontroller IC1 as its control, the model of microcontroller IC1
The pin 14 that the pin 12 of STC15W402AS, microcontroller IC1 connect DC power supply anode 5V, microcontroller IC1 is grounded, should
Ground terminal is the cathode of DC power supply, be connected in parallel between the pin 12 of microcontroller IC1 and 14 filtering and decoupling capacitance C1,
The pin 3,4 and 5 of C2, microcontroller IC1 are set as the analog input end of A/D converter, are separately connected submersible motor voltage detecting
Circuit, diode D1, resistance R1, resistance R2, resistance R3, adjustable resistance RW1 and resistance R4 are sequentially connected in series, diode D2, resistance
R5, resistance R6, resistance R7, adjustable resistance RW2 and resistance R8 are sequentially connected in series, diode D3, resistance R9, resistance R10, resistance R11,
Adjustable resistance RW3 and resistance R12 are sequentially connected in series, the anode of wherein diode D1~D3 be separately connected phase line U, V of submersible motor,
W, the cathode of diode D1~D3 are separately connected one end of resistance R1, R5, R9, the other end ground connection of resistance R4, R8, R12, two poles
The cathode of the plus earth of pipe D0, diode D0 connects zero curve N, and the adjustable tap of adjustable resistance RW1~RW3 is separately connected monolithic
The pin 3,4,5 of machine IC1, the pin 3,4,5 of microcontroller IC1 are separately connected the cathode of zener diode DW1~DW3, voltage stabilizing two
The three phase supply voltage of submersible motor is rectified into the straight of pulsation by the plus earth of pole pipe DW1~DW3, diode D1~D3 respectively
It after galvanic electricity, is inputted respectively in microcontroller IC1 after resistor network divides, through the A/D converter in microcontroller IC1 to the peak of input
After threshold voltage Signal coding, so that it may which, to obtain the supply voltage virtual value of corresponding submersible motor, adjustable resistance RW1~RW3 is used
In the voltage value of calibration measurement, diode D0 plays the role of that backward voltage is isolated, and is caused to light current circuit to prevent backward voltage
Adverse effect, zener diode DW1~DW3 can limit possible overvoltage；The pin 7,8,9 and 10 of microcontroller IC1 is arranged
For the analog input end of A/D converter, it is separately connected submersible motor water shortage and leak state detection circuit, resistance R13~R16's
One end is separately connected one end of electrode probe RLS1~RLS4, and the other end of electrode probe RLS1~RLS4 is grounded, and resistance R13~
The resistance value of the other end connection DC power supply anode 5V, electrode probe RLS1~RLS4 of R16 are with the aqueous of institute contact position
The increase of rate and reduce, resistance R13~R16 forms bleeder circuit, partial pressure value difference with electrode probe RLS1~RLS4 respectively
The pin 7,8,9 and 10 for inputting microcontroller IC1, after the A/D converter in microcontroller IC1 is to the voltage signal coding of input,
After the comparison by being encoded to the voltage signal just it is available whether the status parameter values of water shortage or leak；Microcontroller IC1's
Pin 24,25 and 26 is separately connected one end of thermistor RT1~RT3, and the pin 23 of microcontroller IC1 connects the one of capacitance C4
End, the other end of the other end connection capacitance C4 of quick resistance RT1~RT3 and the cathode and microcontroller IC1 of zener diode DW4
Pin 13, the plus earth of zener diode DW4, in the charge and discharge process of corresponding thermistor and capacitance C4, by monolithic
Digital clock in machine IC1 realizes the coding of corresponding thermistor resistance value, is then carried out according to the resistivity-temperature characteristics of thermistor
It searches and then temperature value, zener diode DW4 provides discharge path for capacitance C4 and limit possible induced overvoltage, list
The pin 11 and 13 of piece machine IC1 is respectively set to the reverse phase and in-phase input end of comparator, is gone here and there between resistance R17 and resistance R18
Join adjustable resistance RW4, the other end ground connection of the other end connection DC power supply anode 5V, resistance R18 of resistance R17 are adjustable
The adjustable tap of resistance RW4 is connected between resistance R17 and adjustable resistance RW4 and the pin of microcontroller IC1 11；Using Communication Set
Data, the model RS485 of communication integrated circuit IC2, to increase communication distance, the monolithic are sent and received at IC circuit 2
The pin 2 and 3 of the 2 connection communication Integrated circuit IC 2 of pin of machine IC1, it is single to control the working condition of communication integrated circuit IC2
The pin 20 of piece machine IC1 connects an input terminal of NAND gate U1, and the pin 22 of microcontroller IC1 connects another of NAND gate U1
The pin 20 of input terminal, wherein microcontroller IC1 exports high-frequency carrier signal, and the pin 22 of microcontroller IC1 is set as serial data
Transmitting terminal, the pin 21 of microcontroller IC1 are set as serial data receiving terminal, 22 outputting data signals of pin of microcontroller IC1, with
NOT gate U1 is two input nand gates, by NAND gate U1 outgoing carrier modulated signals, the output end connection reverser U2 of NAND gate U1
Input terminal, the pin 4 of the output end connection communication Integrated circuit IC 2 of phase inverter U2, communication integrated circuit IC2 is by pin 4
The carrier (boc) modulated signals of input are exported by pin 6 and 7, the carrier (boc) modulated signals that communication integrated circuit IC2 is inputted by pin 6 and 7
It is exported by pin 1, inverted device U3 isolation output, one end of output end the connection resistance 20 and resistance 21 of phase inverter U3, resistance
The base stage of 20 other end connecting triode Q1, triode Q1 are NPN type triode, and the collector of triode Q1 connects resistance
The other end of one end of R19, resistance R19 connects power supply 5V, emitter, the capacitance of the other end connecting triode Q1 of resistance R21
One end of C3 and the pin 21 of microcontroller IC1, the other end ground connection of capacitance C3, the pin 21 of phase inverter U3 and microcontroller IC1 it
Between circuit network be that filter filters out carrier component, retention data ingredient, while improving output level value, make filtered electricity
Level values meet the level demand of microcontroller IC1, and the data-signal received is made to finally enter the pin 21 of microcontroller IC1, communication
The pin 5 that the pin 8 of Integrated circuit IC 2 connects DC power supply anode 5V, communication integrated circuit IC2 is grounded, and communication is integrated
Resistance R22 is connected between the pin 6 of IC circuit 2 and 7, the both ends of resistance R22 are separately connected one end of capacitance C5 and capacitance C6, electricity
The other end for holding C5 and capacitance C6 is separately connected firewire LA and zero curve N, single-phase works of the resistance R22 between firewire LA and zero curve N
Frequency forceful electric power voltage provides access, and capacitance C5 and capacitance C6 are very high to power frequency ingredient impedance, but very to the impedance of high-frequency carrier signal
It is low, keep the power-frequency voltage ingredient at the both ends resistance R22 very low so that can ignore completely, and the high frequency at the both ends resistance R22 is made to carry
Wave voltage ingredient is very high.
Core element of the master control borad using microcontroller IC3 as its control, it is characterised in that：The type of microcontroller IC3
Number it is STC15W408AS, the pin 14 that the pin 12 of microcontroller IC3 connects DC power source adapter anode 5V, microcontroller IC3 connects
Ground, the ground terminal are the cathode of DC power source adapter, and filtering and decoupling are connected in parallel between the pin 12 of microcontroller IC3 and 14
Capacitance C19, C20, the pin 3,4,5 and 8 of microcontroller IC3 are set as the analog input end of A/D converter, current transformer TA1
~TA3 is connected in parallel with diode D8~D9 and resistance R35~R37 respectively, wherein one end of current transformer TA1~TA3 with
The other end of the plus earth of diode D8~D9, current transformer TA1~TA3 is separately connected the pin 3 of microcontroller IC3,4 and
After A/D converter in 5, microcontroller IC3 respectively encodes the voltage peak of resistance R35~R37 and then obtain current value；Electricity
It hinders R29~R33 and button SB0~SB4 forms key circuit, the parameter of master control borad is arranged, the key circuit passes through monolithic
A/D converter in machine IC3 detects the voltage range corresponding to each button to obtain key assignments, and resistance R29~R33 goes here and there successively
Connection, one end ground connection of one end connection DC power source adapter the anode 5V, button SB0~SB4 of resistance R29, button SB0~SB4
The other end be separately connected the other end of resistance R29~R33, one end connection resistance R29, resistance R30 and the button of resistance R34
One end of SB0, the pin 8 of one end and microcontroller IC3 of the other end connection capacitance C11 of resistance R34；Timing ic IC5
Warning circuit is formed with timing ic IC6 and its peripheral component, which is controlled by the pin 13 of microcontroller IC3
System, timing ic IC5 and timing ic IC6 are 555 integrated timers, after capacitance C12 and capacitance C13 parallel connections,
One end is grounded, and the other end connects DC power source adapter anode 5V, timing ic IC5 and its peripheral component forms low frequency
Square-wave oscillator circuit, timing ic IC6 and its peripheral component form high-frequency oscillating circuits, and the high-frequency oscillating circuits is by institute
The control for stating low-frequency square-wave oscillating circuit makes the high-frequency oscillating circuits export intermittent high-frequency signal, the high-frequency signal
For audio signal, the low frequency signal frequency is about 1Hz or so, the luminous first device of the low-frequency square-wave oscillating circuit output driving
Part, and then luminous alarm signal is exported, the high-frequency oscillating circuits output driving loud speaker HW sends out audio alarming signal；It is single
The pin 9 of piece machine IC3 connects one end of resistance R23, the base stage of the other end connecting triode Q2 of resistance R23, and triode Q2 is
The collector of PNP type triode, emitter connection DC power source adapter the anode 5V, triode Q2 of triode Q2 connects relay
One end of the coil of device KA, the other end ground connection of the coil of relay KA, the coil of relay KA is in parallel with diode D12, after
The normally-closed contact of electric appliance KA is connected to the control circuit of submersible motor, the wherein plus earth of diode D12, and microcontroller IC3 is logical
Its pin 9 control triode Q2 is crossed, and then controls relay KA, the purpose for whether stopping submersible motor being finally reached；Setting one
A liquid crystal display is to show relevant information, and the model of the liquid crystal display is 1602A, and the P2 mouths of microcontroller IC3 connect liquid
The data port of crystal display screen, with the data exchange both realized, the pin 15,16 and 19 of microcontroller IC3 is separately connected described
The pin 4,5 and 6 of liquid crystal display, to realize the control to liquid crystal display working condition, adjustable resistance RW5 is to adjust for setting
The contrast of liquid crystal display, the pin 6 of microcontroller IC3 connect one end of resistance R44, and the other end of resistance R44 connects three poles
The base stage of pipe Q3, triode Q3 are PNP type triodes, the emitter connection DC power source adapter anode 5V of triode Q3, three
The pin 15 of the collector connection liquid crystal display of pole pipe Q3, microcontroller IC3 control LCD screen backlight by triode Q3
The light on and off of lamp；The pin 1 and 16 of liquid crystal display is grounded, and the pin 2 of liquid crystal display connects DC power source adapter anode 5V；
Data are sent and received using communication integrated circuit IC4, the model RS485 of communication integrated circuit IC4, with increase communication away from
From the pin 2 and 3 of the 7 connection communication Integrated circuit IC 2 of pin of the microcontroller IC3, to control communication integrated circuit IC2's
Working condition, the pin 20 of microcontroller IC3 connect an input terminal of NAND gate U4, the connection of pin 22 of microcontroller IC3 with it is non-
The pin 20 of another input terminal of door U4, wherein microcontroller IC3 exports high-frequency carrier signal, and the pin 22 of microcontroller IC3 is set
It is set to serial data transmitting terminal, the pin 21 of microcontroller IC3 is set as serial data receiving terminal, and the pin 22 of microcontroller IC3 is defeated
Go out data-signal, NAND gate U4 is two input nand gates, by NAND gate U4 outgoing carrier modulated signals, the output end of NAND gate U4
Connect the input terminal of reverser U5, the pin 4 of the output end connection communication Integrated circuit IC 4 of phase inverter U5, communication integrated circuit
IC4 is exported the carrier (boc) modulated signals inputted by pin 4 by pin 6 and 7, and communication integrated circuit IC4 is inputted by pin 6 and 7
Carrier (boc) modulated signals are exported by pin 1, inverted device U6 isolation output, the output end connection resistance 46 and resistance 47 of phase inverter U6
One end, the base stage of the other end connecting triode Q4 of resistance 46, triode Q4 be NPN type triode, the current collection of triode Q4
Pole connects one end of resistance R45, and the other end of the other end connection DC power source adapter anode 5V, resistance R47 of resistance R45 connect
Connect the emitter of triode Q4, one end of capacitance C21 and microcontroller IC3 pin 21, capacitance C21 the other end ground connection, reverse phase
Circuit network between device U6 and the pin 21 of microcontroller IC3 is that filter filters out carrier component, and retention data ingredient carries simultaneously
Height output level value makes filtered level value meet the level demand of microcontroller IC3, keeps the data-signal received finally defeated
Enter the pin 21 of microcontroller IC3, the pin 8 of communication integrated circuit IC4 connects DC power source adapter anode 5V, communicates integrated electricity
The pin 5 of road IC4 is grounded, and resistance R48 is connected between the pin 6 of communication integrated circuit IC4 and 7, the both ends of resistance R48 connect respectively
Connect one end of capacitance C22 and capacitance C23, the other end of capacitance C22 and capacitance C23 are separately connected firewire LA and zero curve N, resistance
Single phase industrial frequence forceful electric power voltages of the R48 between firewire LA and zero curve N provides access, capacitance C22 and capacitance C23 and hinders power frequency ingredient
It is anti-very high but very low to the impedance of high-frequency carrier signal, keep the power-frequency voltage ingredient at the both ends resistance R48 very low so that can be complete
Ignore entirely, and keeps the high frequency carrier voltage component at the both ends resistance R48 very high.
DC power source adapter for master control borad power supply is transformer isolation formula, and the direct current supply electricity being arranged on plate is adopted in number
Source is transformer isolation formula, and to ensure that the normal table of circuit works, wave arrestment is arranged in the DC power supply that number adopts plate
Inductance L1, the wave arrestment inductance L1 have very strong inhibiting effect to high frequency carrier voltage component, so that number adopts the logical of plate and master control borad
Letter signal will not influence normal communication between the two by the input impedance short circuit of the DC power supply.
The frequency that the number adopts the carrier wave communicated between plate and master control borad is 100KHz~500KHz, the transmission baud of data
Rate is 9600b/s or so.
Number adopts the data that plate is sent to master control borad and uses double byte unsigned number, and first character section is data description code, uses
In the type and attribute that describe transmitted data, second byte is numeric data code, for the specific magnitude of the data transmitted.
High 4 of the data description code are main description code, the type for describing data, the data description code
Low 4 be auxiliary description code, the feature for the data to respective type is described in more detail.
The agreement of the main description code is：0000 indicates leak, and 0001 indicates temperature, and 0010 indicates voltage, 0011 table
Show that electric current, wherein leak and water shortage use identical main description code, be distinguish by aid illustration code；The aid illustration code
Agreement be：For leak, leak data are indicated when lowest order is 1, water shortage data are indicated when lowest order is 0, for temperature
Degree, the position of low 3 expressions thermometric, the 4th indicates the positive and negative of temperature value, wherein 0 indicates positive temperature, 1 indicates negative temperature, for
Voltage and current, the phase ordinal number of low 2 expressions voltage and current.
When the number adopts plate and sends a data to the master control borad, transmission data description code first retransmits numeric data code,
Transmission interval time between each two data should be much larger than between the transmission between the data description code and numeric data code of each data
Every the time, so that master control borad can isolate each data well.
The number adopts plate and master control borad sends and receives data using serial ports.
The number is adopted and adopts plate only transmission data without connecing using half-duplex operation or the number between plate and master control borad
Receive data.
As soon as after the number, which adopts plate, completes the measurement of a physical index data, start transmission data program at once,
The physical index data are sent to the master control borad.
The serial ports interruption of the master control borad is set as highest priority interrupt, when the serial ports of the master control borad receives number
According to when, just stop the operation of other programs immediately, then operation data receives program, to ensure the normally receiving without quilt of data
It omits.
When submersible motor is shut down, master control borad operation data stores program, is preserved in its data storage EEPROM each
The last one or several data of a physical index, the last one or several data of each physical index are diving
Each data master control borad last time or obtained for several times before motor stopping.
It is had the beneficial effect that possessed by submersible motor protector of the present invention：Number is installed at underwater submersible motor
The physical index data that plate directly detects submersible motor are adopted, the physical index data of detection are more, eliminate submersible motor
Protect blind area；Number, which is adopted, uses serial communication between plate and master control borad, and uses power frequency supply line as communication line, the conducting wire used
It is few, small investment；Number is adopted and is communicated using carrier modulation by the way of between plate and master control borad, and uses the RS485 communication technologys, communicate away from
From remote；The control core element of plate and master control borad is adopted as number using microcontroller, high degree of automation is powerful, convenient for
The interconnection of other digital automation equipment；Current transformer is mounted on the water surface or more, and what current signal included contains much information, and expands
The range of current protection；Master control borad can automatically save submersible motor shut down before finally obtained by the master control borad it is each
The individual data of physical index contributes to the analysis of data and the judgement of failure.
Description of the drawings
Fig. 1 show the schematic diagram of submersible motor protector of the present invention；
Fig. 2 show the circuit diagram that number of the present invention adopts plate；
Fig. 3 show the DC power supply circuit diagram that number of the present invention adopts plate；
Fig. 4 show master control borad circuit diagram of the present invention；
Fig. 5 show the partial circuit diagram of circuit diagram shown in Fig. 4；
Fig. 6 show the partial circuit diagram of circuit diagram shown in Fig. 4；
Fig. 7 show the connection relation schematic diagram for counting and adopting between plate, master control borad and trap.
Wherein, R0~R48, resistance C0~C23, capacitance L0, L1, inductance D0~D12, diode Q1, Q4,
The normally opened contact of NPN type triode Q2, Q3, PNP type triode DF, light emitting diode HW, loud speaker KM, contactor
KA, relay FU0, FU2, fuse TA1, TA2, TA3, current transformer RY0, RY1, varistor T, transformer
It is MCR, thyristor TL431, voltage stabilizing triode DW1~DW5, zener diode SB0~SB5, button U1~U6, two defeated
Enter NAND gate 1602A, liquid crystal display IC1, IC3, microcontroller IC2, IC4, communication integrated circuit IC5, IC6, determine
When integrated circuit RW1~RW5, adjustable resistance L, the firewire N of power supply system, zero curve LA, conducting wire.
In addition, the model of microcontroller IC1 is STC15W402AS, the model of microcontroller IC3 is STC15W408AS, Communication Set
Signal at IC circuit 2 and IC4 is RS485, and timing ic IC5 and IC6 are 555 integrated timers, and U, V and W are diving
3 terminals of motor, A, B, C be power supply system 3 phase power supplys, PE is protective wire, respectively two input nand gate U2,
Two input terminals of U3, U5 and U6 link together, and two input nand gate U2, U3, U5 and U6 is made to play the role of phase inverter.
Specific implementation mode
The specific implementation mode of submersible motor protector of the present invention is made below in conjunction with the accompanying drawings further detailed
Explanation.
Technical solution is used by submersible motor protector of the present invention:It is directly set at underwater submersible motor
It sets number and adopts plate, which adopts the need physical index data to be protected that plate measures submersible motor, and these physical index numbers
According to the master control borad for being uploaded to the water surface or more by serial ports, the physical index data that master control borad is obtained according to it judge whether to send out
Go out alarm signal or cut off the power supply of submersible motor, to play the purpose of protection submersible motor；The number adopts plate and master
Communication between control plate is carried out by the way of power carrier modulation；It is monolithic that the number, which adopts plate and the control core of master control borad,
Machine.
As shown in Fig. 1, a kind of submersible motor protector of the present invention, including number adopt plate and master control borad, the number
It adopts plate and submersible motor exists together under water, the number adopts plate and is mounted on the outside of submersible motor outer wall, and imposes water-proof thermal insulation material
It is isolated with motor outer wall or the external world, the number adopts the physical index in plate detection submersible motor operational process, and detection is tied
Fruit is uploaded to master control borad, and the master control borad provides power supply by DC power source adapter, is adopted in number and DC power supply is arranged on plate,
The DC power supply is transformed to the single-phase AC voltage provided between the firewire L and zero curve N of power supply system to stablize essence
True direct current power source voltage adopts the supply voltage of plate as number, and the number, which is adopted, uses conducting wire LA and zero curve N between plate and master control borad
It is connected, plate is adopted using a cable connection to underwater submersible motor sum number.
Trap is installed between the conducting wire LA and the firewire L of power supply system, which is low-pass filtering
Device, which allows power frequency ac voltage to pass through, and is impermissible for high-frequency voltage signal and passes through, so that number adopts plate and master control
The signal of communication of plate will not influence normal communication between the two by system impedance short circuit, while will not be let out to power supply system
Reveal high-frequency signal and interferes；The firewire L and zero curve N of the power supply system are power input end, conducting wire LA and zero curve N
It is power output end.
The underwater submersible motor sum number adopts plate using equipment more than cable connection to the water surface, in the cable
Core includes the conducting wire LA, zero curve N and the power cord of submersible motor and the protective wire of submersible motor, the conducting wire LA and zero
Line N is that number adopts the power supply line that the communication line sum number between plate and master control borad adopts plate.
The communications adopted between plate and master control borad of number are carried out using carrier modulation by the way of, with overcome serious electric power interfere with
Meet the accuracy stability of signal transmission.
It is set with current transformer in the phase line of conducting wire on the water, the current signal of the current transformer inputs master control
Plate, to realize the current protection to submersible motor.
The number adopts temperature parameter, leak state parameter, exsiccosis parameter and the electric moter voltage of plate detection submersible motor
The physical indexs such as parameter, wherein the temperature parameter of detection submersible motor includes the winding temperature parameter of submersible motor, upper bearing (metal)
Temperature parameter and lower bearing temperature parameter, the leak state parameter for detecting submersible motor include the grease chamber leak state of submersible motor
Parameter, submersible motor cavity of resorption leak state parameter and submersible motor wire connection cavity leak state parameter, detection submersible motor voltage ginseng
Number is derived from the connecting position of wires of the wire connection cavity of submersible motor.
The master control borad, DC power source adapter, trap and current transformer are mounted in control room or control cabinet, and
It does not reside at underwater.
The physical index data that the master control borad is obtained according to it judge whether to send out alarm signal or cut-out diving
The power supply of motor, to play the purpose of protection submersible motor.
As shown in Fig. 1, the firewire L and zero curve N of one end connection power supply system of the trap, other end connection
One end of conducting wire LA and zero curve N, fuse FU0 connects firewire L, the other end connect varistor RY0, resistance R0, capacitance C0 and
One end of inductance L0, varistor RY0, resistance R0 and the other end of capacitance C0 connect zero curve N, and the other end connection of inductance L0 is led
Line LA.
As shown in Fig. 2, the number adopts core element of the plate using microcontroller IC1 as its control, the type of microcontroller IC1
Number it is STC15W402AS, the pin 14 that the pin 12 of microcontroller IC1 connects DC power supply anode 5V, microcontroller IC1 connects
Ground, the ground terminal are the cathode of DC power supply, and filtering and decoupling electricity are connected in parallel between the pin 12 of microcontroller IC1 and 14
Hold C1, C2, the pin 3,4 and 5 of microcontroller IC1 is set as the analog input end of A/D converter, is separately connected submersible motor voltage
Detection circuit, diode D1, resistance R1, resistance R2, resistance R3, adjustable resistance RW1 and resistance R4 are sequentially connected in series, diode D2,
Resistance R5, resistance R6, resistance R7, adjustable resistance RW2 and resistance R8 are sequentially connected in series, diode D3, resistance R9, resistance R10, resistance
R11, adjustable resistance RW3 and resistance R12 are sequentially connected in series, and the anode of wherein diode D1~D3 is separately connected the phase line of submersible motor
U, V, W, the cathode of diode D1~D3 are separately connected one end of resistance R1, R5, R9, and the other end of resistance R4, R8, R12 are grounded,
The cathode of the plus earth of diode D0, diode D0 connects zero curve N, and the adjustable tap of adjustable resistance RW1~RW3 is separately connected
The pin 3,4,5 of microcontroller IC1, the pin 3,4,5 of microcontroller IC1 are separately connected the cathode of zener diode DW1~DW3, surely
Press the plus earth of diode DW1~DW3, diode D1~D3 that the three phase supply voltage of submersible motor is rectified into pulsation respectively
Direct current after, inputted respectively in microcontroller IC1 after resistor network divides, through the A/D converter in microcontroller IC1 to input
Peak voltage signal coding after, so that it may to obtain the supply voltage virtual value of corresponding submersible motor, adjustable resistance RW1~
RW3 is used for the voltage value of calibration measurement, and diode D0 plays the role of that backward voltage is isolated, to prevent backward voltage to light current circuit
It adversely affects, zener diode DW1~DW3 can limit possible overvoltage；The pin 7,8,9 and 10 of microcontroller IC1
It is set as the analog input end of A/D converter, is separately connected submersible motor water shortage and leak state detection circuit, resistance R13~
One end of R16 is separately connected one end of electrode probe RLS1~RLS4, the other end ground connection of electrode probe RLS1~RLS4, resistance
The resistance value of the other end connection DC power supply anode 5V, electrode probe RLS1~RLS4 of R13~R16 are with institute contact position
The increase of moisture content and reduce, resistance R13~R16 forms bleeder circuit, partial pressure value with electrode probe RLS1~RLS4 respectively
The pin 7,8,9 and 10 of input microcontroller IC1 respectively encodes the voltage signal of input through the A/D converter in microcontroller IC1
Afterwards, after the comparison by being encoded to the voltage signal just it is available whether the status parameter values of water shortage or leak；Microcontroller IC1
Pin 24,25 and 26 be separately connected one end of thermistor RT1~RT3, the pin 23 of microcontroller IC1 connects capacitance C4's
One end, the other end of the other end connection capacitance C4 of quick resistance RT1~RT3 and the cathode and microcontroller of zener diode DW4
The pin 13 of IC1, the plus earth of zener diode DW4, in the charge and discharge process of corresponding thermistor and capacitance C4, by list
Digital clock in piece machine IC1 realizes the coding of corresponding thermistor resistance value, then according to the resistivity-temperature characteristics of thermistor into
Row is searched and then temperature value, and zener diode DW4 provides discharge path for capacitance C4 and limits possible induced overvoltage,
The pin 11 and 13 of microcontroller IC1 is respectively set to the reverse phase and in-phase input end of comparator, between resistance R17 and resistance R18
Serial adjustable hinders RW4, and the other end ground connection of the other end connection DC power supply anode 5V, resistance R18 of resistance R17 can
The adjustable tap of tune resistance RW4 is connected between resistance R17 and adjustable resistance RW4 and the pin of microcontroller IC1 11；Using communication
Integrated circuit IC 2 sends and receives data, the model RS485 of communication integrated circuit IC2, to increase communication distance, the list
The pin 2 and 3 of the 2 connection communication Integrated circuit IC 2 of pin of piece machine IC1, to control the working condition of communication integrated circuit IC2,
The pin 20 of microcontroller IC1 connects an input terminal of NAND gate U1, and the pin 22 of microcontroller IC1 connects the another of NAND gate U1
The pin 20 of a input terminal, wherein microcontroller IC1 exports high-frequency carrier signal, and the pin 22 of microcontroller IC1 is set as serial ports number
According to transmitting terminal, the pin 21 of microcontroller IC1 is set as serial data receiving terminal, 22 outputting data signals of pin of microcontroller IC1,
NAND gate U1 is two input nand gates, and by NAND gate U1 outgoing carrier modulated signals, the output end of NAND gate U1 connects reverser
The input terminal of U2, the pin 4 of the output end connection communication Integrated circuit IC 2 of phase inverter U2, communication integrated circuit IC2 is by pin
The carrier (boc) modulated signals of 4 inputs are exported by pin 6 and 7, the carrier (boc) modulated signals that communication integrated circuit IC2 is inputted by pin 6 and 7
It is exported by pin 1, inverted device U3 isolation output, one end of output end the connection resistance 20 and resistance 21 of phase inverter U3, resistance
The base stage of 20 other end connecting triode Q1, triode Q1 are NPN type triode, and the collector of triode Q1 connects resistance
The other end of one end of R19, resistance R19 connects power supply 5V, emitter, the capacitance of the other end connecting triode Q1 of resistance R21
One end of C3 and the pin 21 of microcontroller IC1, the other end ground connection of capacitance C3, the pin 21 of phase inverter U3 and microcontroller IC1 it
Between circuit network be that filter filters out carrier component, retention data ingredient, while improving output level value, make filtered electricity
Level values meet the level demand of microcontroller IC1, and the data-signal received is made to finally enter the pin 21 of microcontroller IC1, communication
The pin 5 that the pin 8 of Integrated circuit IC 2 connects DC power supply anode 5V, communication integrated circuit IC2 is grounded, and communication is integrated
Resistance R22 is connected between the pin 6 of IC circuit 2 and 7, the both ends of resistance R22 are separately connected one end of capacitance C5 and capacitance C6, electricity
The other end for holding C5 and capacitance C6 is separately connected firewire LA and zero curve N, single-phase works of the resistance R22 between firewire LA and zero curve N
Frequency forceful electric power voltage provides access, and capacitance C5 and capacitance C6 are very high to power frequency ingredient impedance, but very to the impedance of high-frequency carrier signal
It is low, keep the power-frequency voltage ingredient at the both ends resistance R22 very low so that can ignore completely, and the high frequency at the both ends resistance R22 is made to carry
Wave voltage ingredient is very high.
As shown in attached drawing 4 to attached drawing 6, core element of the master control borad using microcontroller IC3 as its control, microcontroller
The pin 12 of the model STC15W408AS of IC3, microcontroller IC3 connect DC power source adapter anode 5V, microcontroller IC3's
Pin 14 is grounded, which is the cathode of DC power source adapter, and filter is connected in parallel between the pin 12 of microcontroller IC3 and 14
Wave and decoupling capacitance C19, C20, the pin 3,4,5 and 8 of microcontroller IC3 are set as the analog input end of A/D converter, and electric current is mutual
Sensor TA1~TA3 is connected in parallel with diode D8~D9 and resistance R35~R37 respectively, wherein current transformer TA1~TA3's
The other end of the plus earth of one end and diode D8~D9, current transformer TA1~TA3 is separately connected drawing for microcontroller IC3
Foot 3,4 and 5 after the A/D converter in microcontroller IC3 respectively encodes the voltage peak of resistance R35~R37 and then obtains electricity
Flow valuve；Resistance R29~R33 and button SB0~SB4 form key circuit, and the parameter of master control borad is arranged, the key circuit is logical
The A/D converter crossed in microcontroller IC3 detects the voltage range corresponding to each button to obtain key assignments, resistance R29~R33 according to
Secondary series connection, one end ground connection of one end connection DC power source adapter the anode 5V, button SB0~SB4 of resistance R29, button SB0~
The other end of SB4 is separately connected the other end of resistance R29~R33, and one end of resistance R34 connects resistance R29, resistance R30 and presses
One end of key SB0, the pin 8 of one end and microcontroller IC3 of the other end connection capacitance C11 of resistance R34；Timing ic
IC5 and timing ic IC6 and its peripheral component form warning circuit, pin 13 of the warning circuit by microcontroller IC3
Control, timing ic IC5 and timing ic IC6 are 555 integrated timers, after capacitance C12 and capacitance C13 parallel connections,
One end is grounded, and the other end connects power supply 5V, timing ic IC5 and its peripheral component composition low-frequency square-wave oscillation electricity
Road, timing ic IC6 and its peripheral component form high-frequency oscillating circuits, and the high-frequency oscillating circuits is by the low-frequency square-wave
The control of oscillating circuit makes the high-frequency oscillating circuits export intermittent high-frequency signal, and the high-frequency signal is audio signal,
The low frequency signal frequency is about 1Hz or so, the low-frequency square-wave oscillating circuit output driving light emitting component, and then exports hair
Visual alarm, the high-frequency oscillating circuits output driving loud speaker HW, sends out audio alarming signal；The pin 9 of microcontroller IC3
Connecting one end of resistance R23, the base stage of the other end connecting triode Q2 of resistance R23, triode Q2 is PNP type triode, three
The emitter connection power supply 5V of pole pipe Q2, one end of the coil of the collector connection relay KA of triode Q2, relay KA's
The other end of coil is grounded, and the coil of relay KA is in parallel with diode D12, and the normally-closed contact of relay KA is connected to diving electricity
The control circuit of machine, the wherein plus earth of diode D12, microcontroller IC3 controls triode Q2 by its pin 9, and then controls
Relay KA processed, is finally reached the purpose for whether stopping submersible motor；One liquid crystal display of setting is to show relevant information, institute
The model for stating liquid crystal display is 1602A, the data port of the P2 mouths connection liquid crystal display of microcontroller IC3, to realize the two
Data exchange, the pin 15,16 and 19 of microcontroller IC3 is separately connected the pin 4,5 and 6 of the liquid crystal display, to realize
Control to liquid crystal display working condition, adjustable resistance RW5 is to adjust the contrast of liquid crystal display, microcontroller IC3 for setting
Pin 6 connect one end of resistance R44, the base stage of the other end connecting triode Q3 of resistance R44, triode Q3 is positive-negative-positive three
The collector of pole pipe, emitter connection DC power source adapter the anode 5V, triode Q3 of triode Q3 connects liquid crystal display
Pin 15, microcontroller IC3 passes through the light on and off that triode Q3 controls LCD screen backlight lamp；1 He of pin of liquid crystal display
The pin 2 of 16 ground connection, liquid crystal display connects DC power source adapter anode 5V；It sends and connects using communication integrated circuit IC4
Data are received, the model RS485 of communication integrated circuit IC4, to increase communication distance, the connection of pin 7 of the microcontroller IC3 is logical
The pin 2 and 3 for believing Integrated circuit IC 2, to control the working condition of communication integrated circuit IC2, the pin 20 of microcontroller IC3 connects
An input terminal of NAND gate U4, the pin 22 of microcontroller IC3 connect another input terminal of NAND gate U4, wherein microcontroller
The pin 20 of IC3 exports high-frequency carrier signal, and the pin 22 of microcontroller IC3 is set as serial data transmitting terminal, microcontroller IC3's
Pin 21 is set as serial data receiving terminal, 22 outputting data signals of pin of microcontroller IC3, NAND gate U4 be two inputs with it is non-
Door, by NAND gate U4 outgoing carrier modulated signals, the output end of NAND gate U4 connects the input terminal of reverser U5, phase inverter U5's
The pin 4 of output end connection communication Integrated circuit IC 4, communication integrated circuit IC4 the carrier (boc) modulated signals inputted by pin 4 by
Pin 6 and 7 exports, and the carrier (boc) modulated signals that communication integrated circuit IC4 is inputted by pin 6 and 7 are exported by pin 1, inverted device
U6 isolation outputs, one end of output end the connection resistance 46 and resistance 47 of phase inverter U6, the other end connecting triode of resistance 46
The base stage of Q4, triode Q4 are NPN type triode, and one end of the collector connection resistance R45 of triode Q4, resistance R45's is another
The emitter of the other end connecting triode Q4 of one end connection DC power source adapter anode 5V, resistance R47, the one of capacitance C21
The pin 21 at end and microcontroller IC3, the other end ground connection of capacitance C21, the electricity between phase inverter U6 and the pin 21 of microcontroller IC3
Road network is that filter filters out carrier component, retention data ingredient, while improving output level value, keeps filtered level value full
The level demand of sufficient microcontroller IC3 makes the data-signal received finally enter the pin 21 of microcontroller IC3, communicates integrated electricity
The pin 5 that the pin 8 of road IC4 connects DC power source adapter anode 5V, communication integrated circuit IC4 is grounded, communication integrated circuit
Resistance R48 is connected between the pin 6 of IC4 and 7, the both ends of resistance R48 are separately connected one end of capacitance C22 and capacitance C23, capacitance
The other end of C22 and capacitance C23 are separately connected firewire LA and zero curve N, single-phase works of the resistance R48 between firewire LA and zero curve N
Frequency forceful electric power voltage provides access, and capacitance C22 and capacitance C23 are very high to power frequency ingredient impedance, but to the impedance of high-frequency carrier signal
It is very low, keep the power-frequency voltage ingredient at the both ends resistance R48 very low so that can ignore completely, and make the high frequency at the both ends resistance R48
Carrier voltage ingredient is very high.
Due to master control borad sum number adopt plate ground terminal be possible to the same current potential of the ground terminal of electric system, so be master control borad
The DC power source adapter of power supply is transformer isolation formula, and it is transformer isolation formula to adopt the DC power supply being arranged on plate in number
, to ensure that the normal table of circuit works.
Wave arrestment inductance L1 is set in the DC power supply that number adopts plate, and the wave arrestment inductance L1 is to high frequency carrier voltage component
There is very strong inhibiting effect, so that number adopts plate and the signal of communication of master control borad will not be short by the input impedance of the DC power supply
Road and influence normal communication between the two.
As shown in Fig. 3, which is the DC power supply circuit diagram that number of the present invention adopts plate, this is a kind of
Easy DC power supply, in the figure, the voltage between conducting wire LA and zero curve N are inputted from the primary side of transformer T, from transformation
The secondary side of device T exports, the secondary side connection of primary side parallel connection the varistor RY1, transformer T of wherein transformer T by diode D4~
The bridge rectifier of D7 compositions, the output of the bridge rectifier connect the filter circuit being made of inductance L1 and capacitance C8,
Transformer T provides good isolation effect, after the rectified filtering of output voltage of transformer T, finally by voltage stabilizing triode TL431
Accurate DC voltage is stablized in output, and resistance R25 is the current-limiting resistance or load resistance of thyristor MCR, when output voltage is excessively high
When, zener diode DW5 conducting, and then thyristor MCR conductings makes output voltage be zero or very low, make number adopt plate circuit from
Damage.
It is provided with wave arrestment inductance L1 in figure 3, wave arrestment inductance L1 can greatly improve the defeated of DC power supply circuit
Enter impedance, to which the signal of communication for making number adopt plate and master control borad will not be influenced by the input impedance short circuit of the DC power supply
Normal communication between the two, while wave arrestment inductance L1 is also good smoothing filter, contributes to the flat of DC power supply
Sliding filtering.
Attached drawing 7 show the connection relation schematic diagram for counting and adopting between plate, master control borad and trap, can be more preferable by the figure
Ground understands the connection relation of communication and the supply of electric power of whole system.
The communication integrated circuit IC4 for the communication integrated circuit IC2 and master control borad that number adopts plate uses RS485, wherein number adopts plate
The pin 7 of communication integrated circuit IC2 connect one end of resistance R22 and capacitance C5, the communication integrated circuit IC2 that number adopts plate draws
The other end of one end of the other end and capacitance C6 of the connection resistance of foot 8 R22, capacitance C5 and capacitance C6 are separately connected conducting wire LA and zero
The pin 7 of line N, the communication integrated circuit IC4 of master control borad connect one end of resistance R48 and capacitance C22, and the communication that number adopts plate is integrated
The pin 8 of IC circuit 4 connects one end of the other end and capacitance C23 of resistance R48, the other end difference of capacitance C22 and capacitance C23
Connecting wire LA and zero curve N, the firewire L and zero curve N of one end connection power supply system of the trap, other end connection are led
Line LA and zero curve N, electric energy are inputted between the firewire L and zero curve N of power supply system, are exported between conducting wire LA and zero curve N,
One end of fuse FU0 connects firewire L, and the other end connects one end of varistor RY0, resistance R0, capacitance C0 and inductance L0, pressure
Quick resistance RY0, resistance R0 and the other end of capacitance C0 connect zero curve N, the other end connecting wire LA of inductance L0.
Conducting wire LA and zero curve N is both the supply of electric power line that number adopts plate, and counts the communication line adopted between plate and master control borad, institute
The firewire L by power supply system and zero curve N inputs with electric system electric energy, by conducting wire LA and zero curve N output electric energy, and by
It is adopted in number and transmits signal between plate and master control borad by the way of carrier modulation, so number, which is adopted, uses electric power between plate and master control borad
The mode of carrier modulation is communicated, the benefit using technique scheme be can improve signal transmission quality and reduction lead
The usage amount of line.
The frequency that the number adopts the carrier wave communicated between plate and master control borad is 100KHz~500KHz, the transmission baud of data
Rate is 9600b/s or so.
Communicating requirement between plate and master control borad is adopted in order to meet number, it is necessary to work out communication protocol between the two, this hair
Communication protocol is used by bright：Number adopts data that plate is sent to master control borad using double byte unsigned number, and first character section is
Data description code, the type for describing transmitted data and attribute, second byte is numeric data code, for the data transmitted
Specific magnitude.
High 4 of the data description code are main description code, the type for describing data, the data description code
Low 4 be auxiliary description code, the feature for the data to respective type is described in more detail.
The agreement of the main description code is：0000 indicates leak, and 0001 indicates temperature, and 0010 indicates voltage, 0011 table
Show that electric current, wherein leak and water shortage use identical main description code, be distinguish by aid illustration code.
The agreement of the aid illustration code is：For leak, leak data are indicated when lowest order is 1, work as lowest order
Water shortage data are indicated when being 0；For temperature, the position of low 3 expressions thermometric, the 4th indicates the positive and negative of temperature value, wherein 0 table
Show positive temperature, 1 indicates negative temperature；For voltage and current, the phase ordinal number of low 2 expressions voltage and current.
When the number adopts plate and sends a data to the master control borad, transmission data description code first retransmits numeric data code,
Transmission interval time between each two data should be much larger than between the transmission between the data description code and numeric data code of each data
Every the time, so that master control borad can isolate each data well.
The number adopts plate and master control borad sends and receives data using serial ports；The number is adopted and is adopted between plate and master control borad
Plate only transmission data is adopted without receiving data with half-duplex operation or the number；Plate, which is adopted, when the number completes a physical quantity ginseng
After the measurement of number data, just start transmission data program at once, which is sent to the master control borad；
The serial ports interruption of the master control borad is set as highest priority interrupt, just vertical when the serial ports of the master control borad receives data
Stop the operation of other programs, then operation data receives program, to ensure that data are received normally and are not missed.
When submersible motor is shut down, master control borad operation data stores program, is preserved in its data storage EEPROM each
The last one or several data of a physical index, the last one or several data of each physical index are diving
Each data master control borad last time or obtained for several times before motor stopping, this contributes to the analysis of data and failure
Lookup.
Certainly, in the case where not departing from the frame of the present invention, there can also be other select and development and our energy
It is enough it is envisioned that equivalent device.
Claims (10)
1. a kind of submersible motor protector, including number adopt plate and master control borad, the number adopts plate and submersible motor exists together under water, described
Number adopts plate and is mounted on the outside of submersible motor outer wall, and imposes water-proof thermal insulation material and be isolated with motor outer wall or the external world, the number
Adopt the physical index in plate detection submersible motor operational process, and testing result be uploaded to master control borad, the master control borad by
DC power source adapter provides power supply, is adopted in number and DC power supply is arranged on plate, the DC power supply is power supply system
The single-phase AC voltage provided between the firewire L and zero curve N of system is transformed to stablize accurate direct current power source voltage adopts plate as number
Supply voltage, the number, which is adopted, to be connected between plate and master control borad using conducting wire LA and zero curve N, it is characterised in that：The conducting wire
Trap is installed between LA and the firewire L of power supply system, which is low-pass filter, which allows power frequency to hand over
Galvanic electricity pressure passes through, and is impermissible for high-frequency voltage signal and passes through, so that number adopts plate and the signal of communication of master control borad and will not is
System impedance is short-circuit and influences normal communication between the two, while will not reveal high-frequency signal to power supply system and cause to do
It disturbs；The firewire L and zero curve N of the power supply system are power input ends, and conducting wire LA and zero curve N are power output ends；It is described
Underwater submersible motor sum number adopts the equipment that plate uses a cable connection to the water surface or more, and the core in the cable includes described
The protective wire of conducting wire LA, the power cord of zero curve N and submersible motor and submersible motor, the conducting wire LA and zero curve N are that number adopts plate
Communication line sum number between master control borad adopts the power supply line of plate；Number adopts the communication between plate and master control borad and uses carrier modulation
Mode carry out, to overcome serious electric power to interfere and meet the accuracy stability of signal transmission；The phase line of conducting wire on the water
On be set with current transformer, the current signal of the current transformer inputs master control borad, to realize the electric current to submersible motor
Protection；The number adopts temperature parameter, leak state parameter, exsiccosis parameter and the electric moter voltage parameter of plate detection submersible motor
Equal physical indexs, wherein the temperature parameter of detection submersible motor includes the winding temperature parameter of submersible motor, upper bearing (metal) temperature
Parameter and lower bearing temperature parameter, the leak state parameter for detecting submersible motor include the grease chamber leak state ginseng of submersible motor
Number, submersible motor cavity of resorption leak state parameter and submersible motor wire connection cavity leak state parameter detect submersible motor voltage parameter
It is derived from the connecting position of wires of the wire connection cavity of submersible motor；The master control borad, DC power source adapter, trap and current transformer
In control room or control cabinet, and do not reside at underwater；The physical index data that the master control borad is obtained according to it
Judge whether to send out alarm signal or cut off the power supply of submersible motor, to play the purpose of protection submersible motor.
2. submersible motor protector according to claim 1, the fire of one end connection power supply system of the trap
Line L and zero curve N, the other end connecting wire LA and zero curve N of the trap, it is characterised in that：One end of fuse FU0 connects
Firewire L, the other end connect one end of varistor RY0, resistance R0, capacitance C0 and inductance L0, varistor RY0, resistance R0 and
The other end of capacitance C0 connects zero curve N, the other end connecting wire LA of inductance L0.
3. submersible motor protector according to claim 1, the number adopts core of the plate using microcontroller IC1 as its control
Heart element, it is characterised in that：The pin 12 of the model STC15W402AS of microcontroller IC1, microcontroller IC1 connect direct current supply
The pin 14 of positive pole 5V, microcontroller IC1 are grounded, which is the cathode of DC power supply, the pin of microcontroller IC1
Filtering and decoupling capacitance C1, C2 are connected in parallel between 12 and 14, the pin 3,4 and 5 of microcontroller IC1 is set as A/D converter
Analog input end is separately connected submersible motor voltage detecting circuit, diode D1, resistance R1, resistance R2, resistance R3, adjustable electric
Resistance RW1 and resistance R4 is sequentially connected in series, and diode D2, resistance R5, resistance R6, resistance R7, adjustable resistance RW2 and resistance R8 go here and there successively
Connection, diode D3, resistance R9, resistance R10, resistance R11, adjustable resistance RW3 and resistance R12 are sequentially connected in series, wherein diode D1
The anode of~D3 is separately connected phase line U, V, W of submersible motor, and the cathode of diode D1~D3 is separately connected resistance R1, R5, R9
One end, the other end ground connection of resistance R4, R8, R12, the plus earth of diode D0, the cathode of diode D0 connects zero curve N,
The adjustable tap of adjustable resistance RW1~RW3 is separately connected the pin 3,4,5 of microcontroller IC1, the pin 3 of microcontroller IC1,4,5 points
Not Lian Jie zener diode DW1~DW3 cathode, the plus earth of zener diode DW1~DW3, diode D1~D3 is latent
After the three phase supply voltage of hydroelectric machine is rectified into the direct current of pulsation respectively, microcontroller is inputted respectively after resistor network divides
In IC1, after the A/D converter in microcontroller IC1 is to the peak voltage signal coding of input, so that it may to be dived under water accordingly
The supply voltage virtual value of motor, adjustable resistance RW1~RW3 are used for the voltage value of calibration measurement, and it is anti-that diode D0 plays isolation
Effect to voltage adversely affects light current circuit to prevent backward voltage, and zener diode DW1~DW3 can be limited can
The overvoltage of energy；The pin 7,8,9 and 10 of microcontroller IC1 is set as the analog input end of A/D converter, is separately connected diving electricity
Machine water shortage and leak state detection circuit, one end of resistance R13~R16 are separately connected one end of electrode probe RLS1~RLS4,
The other end of electrode probe RLS1~RLS4 is grounded, and the other end of resistance R13~R16 connects DC power supply anode 5V, electricity
Pole probe RLS1~RLS4 resistance value reduced with the increase of the moisture content of institute contact position, resistance R13~R16 respectively with electrode
RLS1~the RLS4 that pops one's head in forms bleeder circuit, and partial pressure value inputs the pin 7,8,9 and 10 of microcontroller IC1 respectively, through microcontroller
It is just available after the comparison by being encoded to the voltage signal after A/D converter in IC1 encodes the voltage signal of input
Whether the status parameter values of water shortage or leak；The pin 24,25 and 26 of microcontroller IC1 is separately connected thermistor RT1~RT3's
One end, the pin 23 of microcontroller IC1 connect one end of capacitance C4, and the other end connection capacitance C4's of quick resistance RT1~RT3 is another
End and the cathode of zener diode DW4 and the pin 13 of microcontroller IC1, the plus earth of zener diode DW4, in corresponding heat
Quick resistance realizes corresponding thermistor resistance value with the charge and discharge process of capacitance C4 by the digital clock in microcontroller IC1
Then coding according to the resistivity-temperature characteristics of thermistor search and then temperature value, zener diode DW4 is that capacitance C4 is carried
For discharge path and possible induced overvoltage is limited, the pin 11 and 13 of microcontroller IC1 is respectively set to the reverse phase of comparator
And in-phase input end, serial adjustable hinders RW4 between resistance R17 and resistance R18, and the other end of resistance R17 connects direct current supply
The other end of positive pole 5V, resistance R18 are grounded, and the adjustable tap of adjustable resistance RW4 is connected to resistance R17 and adjustable resistance
Between RW4 and the pin of microcontroller IC1 11；Data, communication integrated circuit IC2 are sent and received using communication integrated circuit IC2
Model RS485, the microcontroller IC1 2 connection communication Integrated circuit IC 2 of pin pin 2 and 3, to control Communication Set
At the working condition of IC circuit 2, the pin 20 of microcontroller IC1 connects an input terminal of NAND gate U1, the pin of microcontroller IC1
Another input terminal of 22 connection NAND gate U1, the pin 20 of wherein microcontroller IC1 export high-frequency carrier signal, microcontroller IC1
Pin 22 be set as serial data transmitting terminal, the pin 21 of microcontroller IC1 is set as serial data receiving terminal, microcontroller IC1
22 outputting data signals of pin, NAND gate U1 is two input nand gates, by NAND gate U1 outgoing carrier modulated signals, NAND gate
The input terminal of the output end connection reverser U2 of U1, the pin 4 of the output end connection communication Integrated circuit IC 2 of phase inverter U2 lead to
Believe that Integrated circuit IC 2 is exported the carrier (boc) modulated signals inputted by pin 4 by pin 6 and 7, communication integrated circuit IC2 is by pin 6
It is exported by pin 1 with the carrier (boc) modulated signals of 7 inputs, inverted device U3 isolation output, the output end of phase inverter U3 connects resistance
20 and resistance 21 one end, the base stage of the other end connecting triode Q1 of resistance 20, triode Q1 be NPN type triode, three poles
The other end of one end of the collector connection resistance R19 of pipe Q1, resistance R19 connects power supply 5V, the other end connection three of resistance R21
The emitter of pole pipe Q1, one end of capacitance C3 and microcontroller IC1 pin 21, capacitance C3 the other end ground connection, phase inverter U3 with
Circuit network between the pin 21 of microcontroller IC1 is that filter filters out carrier component, retention data ingredient, while improving output
Level value makes filtered level value meet the level demand of microcontroller IC1, and the data-signal received is made to finally enter monolithic
The pin 8 of the pin 21 of machine IC1, communication integrated circuit IC2 connects DC power supply anode 5V, communication integrated circuit IC2's
Pin 5 is grounded, and resistance R22 is connected between the pin 6 of communication integrated circuit IC2 and 7, the both ends of resistance R22 are separately connected capacitance
The other end of one end of C5 and capacitance C6, capacitance C5 and capacitance C6 are separately connected firewire LA and zero curve N, and resistance R22 is firewire LA
Single phase industrial frequence forceful electric power voltage between zero curve N provides access, and capacitance C5 and capacitance C6 are very high to power frequency ingredient impedance, but to height
The impedance of frequency carrier signal is very low, keeps the power-frequency voltage ingredient at the both ends resistance R22 very low so that can ignore completely, and makes electricity
The high frequency carrier voltage component for hindering the both ends R22 is very high.
4. submersible motor protector according to claim 1, core of the master control borad using microcontroller IC3 as its control
Heart element, it is characterised in that：The pin 12 of the model STC15W408AS of microcontroller IC3, microcontroller IC3 connect DC power supply
The pin 14 of adapter anode 5V, microcontroller IC3 are grounded, which is the cathode of DC power source adapter, microcontroller IC3's
Filtering and decoupling capacitance C19, C20 are connected in parallel between pin 12 and 14, the pin 3,4,5 and 8 of microcontroller IC3 is set as A/D
The analog input end of converter, current transformer TA1~TA3 is in parallel with diode D8~D9 and resistance R35~R37 respectively to be connected
It connects, wherein the plus earth of one end of current transformer TA1~TA3 and diode D8~D9, current transformer TA1~TA3's
The other end is separately connected the pin 3,4 and 5 of microcontroller IC3, and the A/D converter in microcontroller IC3 is respectively resistance R35~R37
Voltage peak coding after so that obtain current value；Resistance R29~R33 and button SB0~SB4 form key circuit, to set
The parameter of master control borad is set, the key circuit detects the voltage corresponding to each button by the A/D converter in microcontroller IC3
Range obtains key assignments, and resistance R29~R33 is sequentially connected in series, and one end of resistance R29 connects DC power source adapter anode 5V, presses
One end of key SB0~SB4 is grounded, and the other end of button SB0~SB4 is separately connected the other end of resistance R29~R33, resistance R34
One end connection resistance R29, resistance R30 and button SB0 one end, one end of the other end connection capacitance C11 of resistance R34 and list
The pin 8 of piece machine IC3；Timing ic IC5 and timing ic IC6 and its peripheral component form warning circuit, should
Warning circuit is controlled by the pin 13 of microcontroller IC3, and timing ic IC5 and timing ic IC6 are 555 integrated timings
After device, capacitance C12 and capacitance C13 parallel connections, one end ground connection, the other end connects DC power source adapter anode 5V, and timing is integrated
IC circuit 5 and its peripheral component form low-frequency square-wave oscillating circuit, and timing ic IC6 and its peripheral component composition are high
Frequency oscillator circuit, the high-frequency oscillating circuits are controlled by the low-frequency square-wave oscillating circuit, and the high-frequency oscillating circuits is made to export
Intermittent high-frequency signal, the high-frequency signal are audio signal, and the low frequency signal frequency is 1Hz or so, the low frequency side
Wave oscillating circuit output driving light emitting component, and then luminous alarm signal is exported, the high-frequency oscillating circuits output driving is raised
Sound device HW, sends out audio alarming signal；The pin 9 of microcontroller IC3 connects one end of resistance R23, the other end connection of resistance R23
The base stage of triode Q2, triode Q2 are PNP type triode, the emitter connection DC power source adapter anode of triode Q2
One end of the coil of the collector connection relay KA of 5V, triode Q2, the other end ground connection of the coil of relay KA, relay
The coil of KA is in parallel with diode D12, and the normally-closed contact of relay KA is connected to the control circuit of submersible motor, wherein diode
The plus earth of D12, microcontroller IC3 by its pin 9 control triode Q2, and then control relay KA, be finally reached whether
Stop the purpose of submersible motor；A liquid crystal display is arranged is to show relevant information, the model of the liquid crystal display
The data port of the P2 mouths connection liquid crystal display of 1602A, microcontroller IC3, to realize the data exchange of the two, microcontroller IC3
Pin 15,16 and 19 be separately connected the pin 4,5 and 6 of the liquid crystal display, to realize to liquid crystal display working condition
Control, for setting adjustable resistance RW5 to adjust the contrast of liquid crystal display, the pin 6 of microcontroller IC3 connects resistance R44's
One end, the base stage of the other end connecting triode Q3 of resistance R44, triode Q3 are PNP type triode, the emitter of triode Q3
The pin 15 of the collector connection liquid crystal display of DC power source adapter anode 5V, triode Q3 is connected, microcontroller IC3 passes through
The light on and off of triode Q3 control LCD screen backlight lamps；The pin 1 and 16 of liquid crystal display is grounded, the pin of liquid crystal display
2 connection DC power source adapter anode 5V；Data are sent and received using communication integrated circuit IC4, communication integrated circuit IC4's
The pin 2 and 3 of the 7 connection communication Integrated circuit IC 2 of pin of model RS485, the microcontroller IC3, it is integrated with control communication
The working condition of IC circuit 2, the pin 20 of microcontroller IC3 connect an input terminal of NAND gate U4, the pin 22 of microcontroller IC3
Another input terminal of NAND gate U4 is connected, the pin 20 of wherein microcontroller IC3 exports high-frequency carrier signal, microcontroller IC3's
Pin 22 is set as serial data transmitting terminal, and the pin 21 of microcontroller IC3 is set as serial data receiving terminal, microcontroller IC3's
22 outputting data signals of pin, NAND gate U4 are two input nand gates, by NAND gate U4 outgoing carrier modulated signals, NAND gate U4
Output end connection reverser U5 input terminal, the pin 4 of the output end connection communication Integrated circuit IC 4 of phase inverter U5, communication
Integrated circuit IC 4 is exported the carrier (boc) modulated signals inputted by pin 4 by pin 6 and 7, and communication integrated circuit IC4 is by 6 He of pin
The carrier (boc) modulated signals of 7 inputs are exported by pin 1, and inverted device U6 isolation output, the output end of phase inverter U6 connects resistance 46
With one end of resistance 47, the base stage of the other end connecting triode Q4 of resistance 46, triode Q4 is NPN type triode, triode
One end of the collector connection resistance R45 of Q4, the other end of resistance R45 connect DC power source adapter anode 5V, resistance R47's
The emitter of other end connecting triode Q4, one end of capacitance C21 and microcontroller IC3 pin 21, another termination of capacitance C21
Circuit network between the pin 21 of ground, phase inverter U6 and microcontroller IC3 is that filter filters out carrier component, retention data at
Point, while output level value is improved, so that filtered level value is met the level demand of microcontroller IC3, makes the data received
Signal finally enters the pin 21 of microcontroller IC3, and the pin 8 of communication integrated circuit IC4 connects DC power source adapter anode 5V,
The pin 5 of communication integrated circuit IC4 is grounded, and resistance R48 is connected between the pin 6 of communication integrated circuit IC4 and 7, resistance R48's
Both ends are separately connected one end of capacitance C22 and capacitance C23, and the other end of capacitance C22 and capacitance C23 are separately connected firewire LA and zero
The single phase industrial frequence forceful electric power voltage of line N, resistance R48 between firewire LA and zero curve N provides access, and capacitance C22 and capacitance C23 are to work
Frequency ingredient impedance is very high, but very low to the impedance of high-frequency carrier signal, keep the power-frequency voltage ingredient at the both ends resistance R48 very low so that
In can ignore completely, and keep the high frequency carrier voltage component at the both ends resistance R48 very high.
5. submersible motor protector according to claim 1, it is characterised in that：For the DC power supply adaptation of master control borad power supply
Device is transformer isolation formula, and it is transformer isolation formula to adopt the DC power supply being arranged on plate in number, and the direct current of plate is adopted in number
Wave arrestment inductance L1 is set in power supply, which has very strong inhibiting effect to high frequency carrier voltage component, so that
Number, which adopts plate and the signal of communication of master control borad, to be influenced therebetween just by the input impedance short circuit of the DC power supply
Normal open is believed.
6. submersible motor protector according to claim 1, it is characterised in that：The number is adopted and is communicated between plate and master control borad
The frequency of carrier wave be 100KHz~500KHz, the transmission baud rates of data is 9600b/s or so.
7. submersible motor protector according to claim 1, it is characterised in that：Number is adopted the data that plate is sent to master control borad and is adopted
With double byte unsigned number, first character section is data description code, the type for describing transmitted data and attribute, second
A byte is numeric data code, for the specific magnitude of the data transmitted；High 4 of the data description code are main description code, are used
Low 4 in the type of description data, the data description code are used for the spy to the data of respective type to assist description code
Sign is described in more detail.
8. submersible motor protector according to claim 7, it is characterised in that：The agreement of the main description code is：
0000 indicates leak, and 0001 indicates temperature, and 0010 indicates voltage, and 0011 indicates electric current, and wherein leak and water shortage are using identical
Main description code is distinguish by aid illustration code；The agreement of the aid illustration code is：For leak, when lowest order is 1
It indicates leak data, water shortage data is indicated when lowest order is 0, for temperature, the position of low 3 expressions thermometric, the 4th expression
Temperature value it is positive and negative, wherein 0 indicates positive temperature, 1 indicates negative temperature, for voltage and current, low 2 expressions voltage and current
Phase ordinal number.
9. submersible motor protector according to claim 7, it is characterised in that：The number is adopted plate and is sent to the master control borad
When one data, transmission data description code first retransmits numeric data code, the transmission interval time between each two data answers long-range
Transmission interval time between the data description code and numeric data code of each data, so that master control borad can be isolated often well
A data.
10. according to the submersible motor protector described in any claim of claim 1,3,4,7, it is characterised in that：It is described
Number adopt plate and master control borad sends and receives data using serial ports；The number, which is adopted, uses half-duplex operation between plate and master control borad
Or the number adopts plate only transmission data without receiving data；When the number adopts the measurement that plate completes a physical index data
Afterwards, just start transmission data program at once, which is sent to the master control borad；The master control borad
Serial ports interruption is set as highest priority interrupt, when the serial ports of the master control borad receives data, just stops other journeys immediately
The operation of sequence, then operation data receives program, is not missed with ensureing normally receiving for data；When submersible motor is shut down
When, master control borad operation data stores program, and the last one of each physical index is preserved in its data storage EEPROM
Or several data, the last one or several data of each physical index are before submersible motor is shut down by the master control borad
Last time or each data obtained for several times.
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| CN201610718550.6A CN106300264B (en) | 2016-08-24 | 2016-08-24 | Submersible motor protector |
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| CN201610718550.6A CN106300264B (en) | 2016-08-24 | 2016-08-24 | Submersible motor protector |
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| CN106300264B true CN106300264B (en) | 2018-09-07 |
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| CN109141539A (en) * | 2018-10-26 | 2019-01-04 | 中国科学院深海科学与工程研究所 | A kind of underwater Multifunctional AC motor control and test device |
| CN114336498B (en) * | 2020-09-29 | 2024-03-19 | 中国移动通信集团设计院有限公司 | DC circuit breaker and DC circuit breaking system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2731096Y (en) * | 2004-09-20 | 2005-10-05 | 杨厚荣 | Downhole intelligent multi-parameter tester for submerged electric pump set |
| CN204731595U (en) * | 2015-06-15 | 2015-10-28 | 四川农业大学 | The online failure monitoring device of a kind of submersible electric motor |
| CN204989416U (en) * | 2015-06-15 | 2016-01-20 | 四川农业大学 | Online trouble monitored control system of submersible electric motor based on DSP |
-
2016
- 2016-08-24 CN CN201610718550.6A patent/CN106300264B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2731096Y (en) * | 2004-09-20 | 2005-10-05 | 杨厚荣 | Downhole intelligent multi-parameter tester for submerged electric pump set |
| CN204731595U (en) * | 2015-06-15 | 2015-10-28 | 四川农业大学 | The online failure monitoring device of a kind of submersible electric motor |
| CN204989416U (en) * | 2015-06-15 | 2016-01-20 | 四川农业大学 | Online trouble monitored control system of submersible electric motor based on DSP |
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Effective date of registration: 20191211 Address after: No.199, Huafeng section, Pinglang Road, LindaI Town, Pinghu City, Jiaxing City, Zhejiang Province Patentee after: Pinghu Yikun power equipment factory Address before: Rushan City Xinping street Weihai city Shandong province 264500 Building 2 Unit No. 503 18-3 Patentee before: Xiao Guoxuan |
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