CN102290788B - Measurement protective device of submersible pump motor - Google Patents
Measurement protective device of submersible pump motor Download PDFInfo
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- CN102290788B CN102290788B CN201110225986.9A CN201110225986A CN102290788B CN 102290788 B CN102290788 B CN 102290788B CN 201110225986 A CN201110225986 A CN 201110225986A CN 102290788 B CN102290788 B CN 102290788B
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Abstract
The invention discloses a measurement protective device of a submersible pump motor, and the device provided by the comprises a master controller and a cavity water seepage detection module, wherein the cavity water seepage detection module comprises a water seepage detection voltage sampling unit, a water seepage detection signal conversion unit and a cavity water seepage output module used for disconnecting the submersible pump motor, wherein the water seepage detection voltage sampling unit comprises an input terminal used for being circumscribed with a reed switch liquid level inductor embedded in the cavity of the motor; the input end of a difference amplifying circuit of the water seepage detection signal conversion unit is electrically connected with the output end of the water seepage detection voltage sampling unit; a frequency signal of the output characterization cavity liquid level is output by the output end to the master controller for processing; the liquid level relation of the frequency signal of the output characterization cavity liquid level and the reed switch liquid level inductor is compared by the master controller; and the cavity water seepage output module is started according to the comparison result. By utilizing the measurement protective device provided by the invention, the power supply source of the submersible pump motor can be timely disconnected when water seeps from the cavity, so that the submersible pump motor is stopped from operating, and working personnel is timely notified to carry out rush reparation.
Description
Technical field
The present invention relates to a kind of device of it being protected by detecting the running status of diving pump motor.
Background technology
In food processing, papermaking, brewage, iron and steel, the dreg slurry of the industrial enterprise such as cement is pumped, the occasions such as sewage disposal all need to use diving pump motor, the measuring and protecting device of existing diving pump motor only relates to for the voltage detecting circuit of phase voltage and the current detection circuit of phase current, but, for diving pump motor, it is far from being enough only having overvoltage and overcurrent protection, particularity due to diving pump motor operational environment, it is very important that the infiltration of its cavity detects, if there is infiltration or overload and will cause immersible pump to work in cavity, if do not disconnect in time at this moment diving pump motor, to diving pump motor be caused to larger infringement, even can cause cable electric leakage, bring great loss to enterprise or personal safety.
Summary of the invention
The present invention, in order to address the above problem, provides a kind of measuring and protecting device that cavity infiltration detects that at least can carry out.
The technical solution used in the present invention is: a kind of measuring and protecting device of diving pump motor, comprise main controller and cavity infiltration detection module, described cavity infiltration detection module comprises that an infiltration detects voltage sample unit and a signal conversion unit as infiltration detection signal converting unit, and one for disconnecting the cavity infiltration output module of diving pump motor;
Described infiltration detects voltage sample unit and has the input terminal that is embedded in advance the tongue tube level sensor in motor cavity body for external, characterizes the resistance variations of tongue tube level sensor to detect the variation of the output voltage of voltage sample unit by infiltration;
Described signal conversion unit comprises differential amplifier circuit, frequency to voltage converter, optocoupler and switching tube, the output of described differential amplifier circuit is electrically connected to the comparison input of frequency to voltage converter, the frequency output terminal of described frequency to voltage converter is connected with the cathodic electricity of the light-emitting diode of optocoupler, the first voltage output end is electrically connected to the anode of the light-emitting diode of optocoupler, and is electrically connected to frequency output terminal; Second voltage output one branch road is electrically connected to the collector electrode of the sensitization triode of optocoupler, another branch road is electrically connected to the emitter as signal conversion unit output of switching tube, the collector electrode of sensitization triode is electrically connected to the base stage of switching tube, the emitter of sensitization triode and the equal ground connection of the collector electrode of switching tube;
The input of the differential amplifier circuit of described infiltration detection signal converting unit and infiltration detect the corresponding electrical connection of output of voltage sample unit, the output output of infiltration detection signal converting unit characterizes the frequency signal of cavity liquid level and processes to main controller, main controller compares characterizing the frequency signal of cavity liquid level and the Relationship between Liquid Level of tongue tube level sensor, and starts described cavity infiltration output module according to comparative result.
Preferably, described cavity infiltration output module adopts outputting circuit for relay, and described outputting circuit for relay comprises relay, and the coil of relay is electrically connected between the infiltration signal output port of tertiary voltage output and main controller; The normally opened contact of described relay is electrically connected on two for making between the cavity infiltration output module execution lead-out terminal in parallel with diving pump motor.
Preferably, the measuring and protecting device of diving pump motor also comprises electromotor winding temperature detection module, described electromotor winding temperature detection module comprises that a winding temperature detects voltage sample unit and another signal conversion unit as winding temperature signal conversion unit, and one for disconnecting the overheated output module of winding of diving pump motor;
Described winding temperature detects voltage sample unit to be had for the input terminal of the corresponding electrical connection of output of PTC transducer with being embedded in advance three series connection of motor winding, to detect the resistance variations of variation sign PTC transducer of the output voltage of voltage sample unit by winding temperature; Winding temperature detects the output of voltage sample unit and the corresponding electrical connection of input of the differential amplifier circuit of winding temperature detection signal converting unit, the output output of winding temperature detection signal converting unit characterizes the frequency signal of winding temperature and processes to main controller, main controller compares characterizing the frequency signal of winding temperature and the frequency signal of different resistances, and starts the overheated output module of winding according to comparative result.
Preferably, the measuring and protecting device of described diving pump motor also comprises bearing of motor temperature detecting module, described bearing of motor temperature detecting module comprises that a bearing temperature detects voltage sample unit and another signal conversion unit as bearing temperature signal conversion unit, and one for disconnecting the bearing running hot output module of diving pump motor;
Described bearing temperature detects voltage sample unit to be had for the input terminal of the corresponding electrical connection of output with being embedded in advance the PTC transducer of bearing of motor, to detect the resistance variations of variation sign PTC transducer of the output voltage of voltage sample unit by bearing temperature; Bearing temperature detects the output of voltage sample unit and the corresponding electrical connection of input of the differential amplifier circuit of bearing temperature detection signal converting unit, the output output of bearing temperature detection signal converting unit characterizes the frequency signal of bearing temperature and processes to main controller, main controller compares characterizing the frequency signal of bearing temperature and the frequency signal of different resistances, and starts bearing running hot output module according to comparative result.
Beneficial effect of the present invention is: measuring and protecting device of the present invention at least can cut off the power supply of diving pump motor in time when cavity seeps water; it is quit work; and notify in time staff to rush to repair; its cavity infiltration detection module adopts the mode that voltage signal is converted to frequency signal to be conducive to main controller to carry out analyzing and processing, make judgement promptly and accurately.
Accompanying drawing explanation
Fig. 1 shows a kind of circuit structure of execution mode of the voltage detection module of measuring and protecting device of the present invention;
Fig. 2 shows a kind of circuit structure of execution mode of the current detection module of measuring and protecting device of the present invention;
Fig. 3 shows a kind of circuit structure of execution mode of the bearing of motor temperature detecting module of measuring and protecting device of the present invention;
Fig. 4 shows a kind of circuit structure of execution mode of the cavity infiltration detection module of measuring and protecting device of the present invention;
Fig. 5 shows a kind of circuit structure of execution mode of the electronic winding temperature detection module of measuring and protecting device of the present invention;
Fig. 6 shows a kind of circuit structure of execution mode of the relay output module of measuring and protecting application of installation of the present invention.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited to this.
Measuring and protecting device of the present invention mainly comprises cavity infiltration detection module as shown in Figure 4, it comprises that infiltration detects voltage sample unit and infiltration detection signal converting unit, this infiltration detects the input terminal LLS1 of voltage sample unit, the external tongue tube level sensor being embedded in advance in motor cavity body of LLS2, and then the resistance variations of collection tongue tube level sensor, this infiltration detection signal converting unit adopts following signal conversion unit, signal conversion unit comprises differential amplifier circuit, frequency to voltage converter U17, optocoupler U32 and switching tube Q1, the output of this differential amplifier circuit is electrically connected to the comparison input VIN of frequency to voltage converter U17, the frequency output terminal FOUT of this frequency to voltage converter U17 is connected with the cathodic electricity of the light-emitting diode of optocoupler U32, the first voltage output end (12V voltage is provided in the present embodiment) is electrically connected to the anode of the light-emitting diode of optocoupler U32 through resistance R 98, and be electrically connected to frequency output terminal FOUT through resistance R 101, second voltage output (3.3V voltage is provided in a present embodiment) branch road is electrically connected to the collector electrode of the sensitization triode of optocoupler U32 through resistance R 100, another branch road is electrically connected to the emitter as signal conversion unit output of switching tube Q1 through resistance R 103, the collector electrode of sensitization triode is electrically connected to the base stage of switching tube Q1 through resistance R 102, the equal ground connection of collector electrode of the emitter of sensitization triode and switching tube Q1.The input of the differential amplifier circuit of infiltration detection signal converting unit and the corresponding electrical connection of output of infiltration detection voltage sample unit, the frequency signal PWM_1 that the output of infiltration detection signal converting unit (being also the output of cavity infiltration detection module) output characterizes cavity liquid level processes to main controller, main controller compares the Relationship between Liquid Level of frequency signal PWM_1 and tongue tube level sensor, when comparative result represents cavity infiltration, main controller will be controlled diving pump motor by a cavity infiltration output module and suddenly stop, and report to the police simultaneously, notify staff to rush to repair.
Other pin of this frequency to voltage converter U17 (being for example that model is the frequency to voltage converter of LM331), as meet the pin R/C of RC timing circuit, the pin RS of input reference electric current, electric current output pin CO, and threshold value pin VX etc., all can adopt conventional peripheral circuit, at this, no longer illustrate.
This cavity infiltration output module can adopt outputting circuit for relay as shown in Figure 6, this outputting circuit for relay comprises relay, the coil K4-B of relay is electrically connected between two power supply terminals, at this, the all right reversal connection diode D6 in parallel with coil K4-B between an another power supply terminal, for coil K4-8 back discharge; The normally opened contact K4-A of this relay is electrically connected on two and carries out lead-out terminal J8-1, between J8-2.Two power supply terminals of this cavity infiltration output module are electrically connected to the infiltration signal output port RLY-4 of tertiary voltage output (output+5V in the present embodiment) and main controller respectively, this cavity infiltration output module can be carried out lead-out terminal J8-1 by it, J8-2 and diving pump motor (for example its control loop) are parallel between power supply, like this, at main controller, know after cavity infiltration, will be in infiltration signal output port RLY-4 output low level, make the relay of cavity infiltration output module obtain electric, and then by control loop short circuit, make diving pump motor in a safe condition.
In addition, this outputting circuit for relay can be carried out lead-out terminal J8-1 at two, is electrically connected to the series circuit of capacitor C 84 and resistance R 48 between J8-2.
This infiltration detects voltage sample unit can comprise two thermistor R1, R2 and two Transient Suppression Diodes (TVS) Z1, Z2, the first voltage output end is in turn through two Transient Suppression Diode Z1, Z2 and resistance R 30 ground connection (AGND), wherein, two Transient Suppression Diode Z1, the anode of Z2 is electrically connected, and ground connection; This input terminal LLS1 is electrically connected to the first voltage output end (being also the negative electrode of Transient Suppression Diode Z1) through thermistor R1, and input terminal LLS2 is connected with the cathodic electricity of Transient Suppression Diode Z2 through thermistor R2.The hot end of resistance R 30 and earth terminal detect voltage sample unit output as infiltration is electrically connected to the input of the differential amplifier circuit of infiltration detection signal converting unit, and wherein, this resistance R 30 can be in parallel with a capacitor C 5, to carry out filtering.
This differential amplifier circuit can comprise two operational amplifier U31-B, U31-A, the homophase of operational amplifier U31-B and inverting input are as the input of differential amplifier circuit respectively through resistance R 116 with R104 is corresponding detects the output of voltage sample unit with infiltration, and the hot end of resistance R 30 and earth terminal are electrically connected to; The inverting input of operational amplifier U31-B is electrically connected to its output through the parallel circuits of capacitor C 67 and resistance R 105, the output of operational amplifier U31-B is electrically connected to the in-phase input end of operational amplifier U31-A, the inverting input of operational amplifier U31-A is through resistance R 120 ground connection, and is electrically connected to its output through resistance R 106.The output of this operational amplifier U31-A is electrically connected to the comparison input VIN of frequency to voltage converter U17 through resistance R 86 as the output of differential amplifier circuit.
This measuring and protecting device can also comprise electromotor winding temperature detection module as described in Figure 5; this electromotor winding temperature detection module comprises that winding temperature detects voltage sample unit and winding temperature signal conversion unit; the above-mentioned signal conversion unit of the same employing of this winding temperature signal conversion unit; this winding temperature detects the input terminal OUT2-of voltage sample unit; OUT2+ and the corresponding electrical connection of output that is embedded in advance the PTC transducer of three series connection in motor winding, three PTC wherein and the corresponding configuration one by one of three phase windings.Winding temperature detects the output of voltage sample unit and the corresponding electrical connection of input of the differential amplifier circuit of winding temperature detection signal converting unit, the frequency signal PWM_2 that the output output of winding temperature detection signal converting unit characterizes winding temperature processes to main controller, (resistance of PTC transducer is larger from different resistances by frequency signal PWM_2 for main controller, characterize temperature higher) frequency signal compare, when comparative result represents that winding temperature surpasses winding temperature set point, main controller will be controlled diving pump motor by the overheated output module of a winding and suddenly stop, and report to the police simultaneously, notify staff to rush to repair.
The overheated output module of this winding also can adopt outputting circuit for relay as shown in Figure 6, two power supply terminals of the overheated output module of this winding are electrically connected to the winding heat alarm output port of tertiary voltage output (output+5V in the present embodiment) and main controller respectively, the overheated output module of this winding can be carried out lead-out terminal J8-1 by it, and the control loop of J8-2 and diving pump motor is parallel between power supply.It is anxious stops the identical of principle and above-mentioned explanation, at this, is not described further.
This winding temperature detects voltage sample unit and comprises two thermistor R1 ', R2 ' and two Transient Suppression Diodes (TVS) Z1 ', Z2 ', the 4th voltage output end VAN is in turn through two resistance R 107, R117 ground connection (AGND), input terminal OUT2-is electrically connected to input terminal OUT2+ through thermistor R1 ', Transient Suppression Diode Z1 ', Transient Suppression Diode Z2 ' and thermistor R2 ' in turn, two Transient Suppression Diode Z1 ', the anode of Z2 ' is electrically connected, and ground connection; The negative electrode of Transient Suppression Diode Z1 ' is electrically connected to the hot end of resistance R 117 through resistance R 118, and the negative electrode of Transient Suppression Diode Z2 ' is through resistance R 119 ground connection.The hot end of resistance R 117 and earth terminal are electrically connected to the input of the differential amplifier circuit of winding temperature detection signal converting unit as the output of winding temperature voltage sample unit.
This measuring and protecting device can also comprise bearing of motor temperature detecting module; as shown in Figure 3; this bearing of motor temperature detecting module comprises that bearing temperature detects voltage sample unit and bearing temperature signal conversion unit; the above-mentioned signal conversion unit of the same employing of this bearing temperature signal conversion unit; this bearing temperature detects the input terminal PT100-1 of voltage sample unit, PT100-2 and the corresponding electrical connection of the output that is embedded in advance the PTC transducer in bearing of motor.Bearing temperature detects the output of voltage sample unit and the corresponding electrical connection of input of the differential amplifier circuit of bearing temperature detection signal converting unit, the frequency signal PC13 that the output output of bearing temperature detection signal converting unit characterizes bearing temperature processes to main controller, (resistance of PTC transducer is larger from different resistances by frequency signal PC13 for main controller, characterize temperature higher) frequency signal compare, when comparative result represents that bearing temperature surpasses bearing temperature set point, main controller will be controlled diving pump motor by a bearing running hot output module and suddenly stop, and report to the police simultaneously, notify staff to rush to repair.
This bearing running hot output module also can adopt outputting circuit for relay as shown in Figure 6, two power supply terminals of bearing running hot output module are electrically connected to the bearing running hot signal output port of tertiary voltage output (output+5V in the present embodiment) and main controller respectively, this bearing running hot output module can be carried out lead-out terminal J8-1 by it, the control loop of J8-2 and diving pump motor is parallel between power supply, it is anxious stops the identical of principle and above-mentioned explanation, at this, is not described further.
This bearing temperature detects voltage sample unit and can comprise and be electrically connected on input terminal PT100-1, two Transient Suppression Diodes (TVS) Z3 between PT100-2, and Z4, two Transient Suppression Diode Z3, the anode of Z4 is electrically connected, and ground connection; The 5th voltage output end (2.5V voltage is provided in a present embodiment) branch road is electrically connected to input terminal PT100-1 through resistance R 20, and another branch road is electrically connected to input terminal PT100-2 through resistance R 18 and R19; In addition, input terminal PT100-1 is through resistance R 14 and resistance R 21 ground connection.The hot end of the hot end of resistance R 19 and resistance R 21 is electrically connected to the input of the differential amplifier circuit of bearing temperature detection signal converting unit as the output of bearing temperature voltage sample unit.Wherein, resistance R 21 can be in parallel with a capacitor C 13, to carry out filtering.
This measuring and protecting device is also provided with the voltage detection module of three phase voltages for detection of three-phase four-wire system as shown in Figure 1; voltage detection module input terminal J6-10; J6-7 accesses and corresponding separately phase voltage; two input terminal J6-10, are electrically connected with the series circuit of the parallel circuits of resistance R 12, R18, R19, R22 and R29 and resistance R 21, capacitor C 18 and Transient Suppression Diode D32 between J6-7.The voltage signal UA-1 of the hot end output of resistance R 221 inputs in the voltage acquisition port of main controller, and the cold end of resistance R 221 is electrically connected to (as ground connection) with reference potential end VREF.These those skilled in the art, all it should be understood that main controller generally should be by the corresponding voltage signal that receives three voltage detection module outputs of three voltage acquisition ports.Equally, main controller equally can be by adopting the overvoltage output module protection diving pump motor of outputting circuit for relay as shown in Figure 6.
This measuring and protecting device is also provided with the current detection module of three phase currents for detection of three-phase four-wire system as shown in Figure 2, the input terminal J6-5 of current detection module, J6-6 access and various corresponding phase currents, input terminal J6-5, between J6-6, be electrically connected with divider resistance R154 and R56, the hot end of resistance R 154 is electrically connected to the in-phase input end of operational amplifier U2-A with the switch member U16-A that is controlled by the control signal CHA1 of main controller output through resistance R 2, the hot end of resistance R 56 is electrically connected to the in-phase input end of operational amplifier U2-A with the switch member U16-B that is controlled by the control signal CHA2 of main controller output through resistance R 59, the cold end of resistance R 56 is electrically connected to the inverting input of operational amplifier U2-A through resistance R 152, the inverting input of operational amplifier U2-A is electrically connected to its output through resistance R 153, the output of operational amplifier U2-A characterizes the voltage signal IA of phase current size to the current sample port of main controller as the lead-out terminal output of current detection module.Equally, main controller equally can be by adopting the overcurrent output module protection diving pump motor of outputting circuit for relay as shown in Figure 6.In addition, main controller can be given tacit consent to and selects opening switch part U16-B, when the electric current that detects when its judgement is too small, can closing switch part U16-B, and opening switch part U16-A.
This input terminal J6-5 can be after thermistor R11 a branch road through Transient Suppression Diode D19 ground connection, the first Transient Suppression Diode ground connection that another branch road is electrically connected through two anodes, input terminal J6-5 after thermistor R20 a branch road through Transient Suppression Diode D2 ground connection, the second Transient Suppression Diode ground connection that another branch road is electrically connected through two anodes, two the first Transient Suppression Diodes and two the second Transient Suppression Diodes form Transient Suppression Diode group Z1; Above-mentioned divider resistance can be electrically connected between resistance R 11 and R20, in addition, also can be electrically connected to a capacitor C 2 between resistance R 11 and R20.
Those skilled in the art is all clear, and above-mentioned each thermistor of mentioning and each Transient Suppression Diode are all effects of playing protection corresponding module, and it is not the functional unit that each module realizes corresponding function.
In addition, for the ease of for PLC provides signal, measuring and protecting device of the present invention can also configure the analogue quantity output circuit that the signal that controller is converted to the output of PWM ripple according to the data that respectively collect is converted to analog output.
The above-mentioned various protection modules of measuring and protecting device sets of the present invention, have just formed composite measurement protective device, for diving pump motor provides omnibearing protection.
Be only preferred embodiment of the present invention in sum, be not used for limiting practical range of the present invention, i.e. all equivalences of doing according to the content of the present patent application the scope of the claims change and modify, and all should belong to technology category of the present invention.
Claims (4)
1. the measuring and protecting device of a diving pump motor, it is characterized in that: comprise main controller and cavity infiltration detection module, described cavity infiltration detection module comprises that an infiltration detects voltage sample unit and a signal conversion unit as infiltration detection signal converting unit, and one for disconnecting the cavity infiltration output module of diving pump motor;
Described infiltration detects voltage sample unit and has the input terminal that is embedded in advance the tongue tube level sensor in motor cavity body for external, characterizes the resistance variations of tongue tube level sensor to detect the variation of the output voltage of voltage sample unit by infiltration;
Described signal conversion unit comprises differential amplifier circuit, frequency to voltage converter, optocoupler and switching tube, the output of described differential amplifier circuit is electrically connected to the comparison input of frequency to voltage converter, the frequency output terminal of described frequency to voltage converter is connected with the cathodic electricity of the light-emitting diode of optocoupler, the first voltage output end is electrically connected to the anode of the light-emitting diode of optocoupler, and is electrically connected to frequency output terminal; Second voltage output one branch road is electrically connected to the collector electrode of the sensitization triode of optocoupler, another branch road is electrically connected to the emitter as signal conversion unit output of switching tube, the collector electrode of sensitization triode is electrically connected to the base stage of switching tube, the emitter of sensitization triode and the equal ground connection of the collector electrode of switching tube; The input of the differential amplifier circuit of described infiltration detection signal converting unit and infiltration detect the corresponding electrical connection of output of voltage sample unit, the output output of infiltration detection signal converting unit characterizes the frequency signal of cavity liquid level and processes to main controller, main controller compares characterizing the frequency signal of cavity liquid level and the Relationship between Liquid Level of tongue tube level sensor, and starts described cavity infiltration output module according to comparative result.
2. the measuring and protecting device of diving pump motor according to claim 1, it is characterized in that: described cavity infiltration output module adopts outputting circuit for relay, described outputting circuit for relay comprises relay, and the coil of relay is electrically connected between the infiltration signal output port of tertiary voltage output and main controller; The normally opened contact of described relay is electrically connected on two for making between the cavity infiltration output module execution lead-out terminal in parallel with diving pump motor.
3. the measuring and protecting device of diving pump motor according to claim 1, it is characterized in that: also comprise electromotor winding temperature detection module, described electromotor winding temperature detection module comprises that a winding temperature detects voltage sample unit and another signal conversion unit as winding temperature detection signal converting unit, and one for disconnecting the overheated output module of winding of diving pump motor;
Described winding temperature detects voltage sample unit to be had for the input terminal of the corresponding electrical connection of output of PTC transducer with being embedded in advance three series connection of motor winding, to detect the resistance variations of variation sign PTC transducer of the output voltage of voltage sample unit by winding temperature; Winding temperature detects the output of voltage sample unit and the corresponding electrical connection of input of the differential amplifier circuit of winding temperature detection signal converting unit, the output output of winding temperature detection signal converting unit characterizes the frequency signal of winding temperature and processes to main controller, main controller compares characterizing the frequency signal of winding temperature and the frequency signal of different resistances, and starts the overheated output module of winding according to comparative result.
4. the measuring and protecting device of diving pump motor according to claim 1, it is characterized in that: also comprise bearing of motor temperature detecting module, described bearing of motor temperature detecting module comprises that a bearing temperature detects voltage sample unit and another signal conversion unit as bearing temperature detection signal converting unit, and one for disconnecting the bearing running hot output module of diving pump motor;
Described bearing temperature detects voltage sample unit to be had for the input terminal of the corresponding electrical connection of output with being embedded in advance the PTC transducer of bearing of motor, to detect the resistance variations of variation sign PTC transducer of the output voltage of voltage sample unit by bearing temperature; Bearing temperature detects the output of voltage sample unit and the corresponding electrical connection of input of the differential amplifier circuit of bearing temperature detection signal converting unit, the output output of bearing temperature detection signal converting unit characterizes the frequency signal of bearing temperature and processes to main controller, main controller compares characterizing the frequency signal of bearing temperature and the frequency signal of different resistances, and starts bearing running hot output module according to comparative result.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110225986.9A CN102290788B (en) | 2011-08-08 | 2011-08-08 | Measurement protective device of submersible pump motor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110225986.9A CN102290788B (en) | 2011-08-08 | 2011-08-08 | Measurement protective device of submersible pump motor |
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| CN102290788A CN102290788A (en) | 2011-12-21 |
| CN102290788B true CN102290788B (en) | 2014-01-29 |
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| CN201110225986.9A Expired - Fee Related CN102290788B (en) | 2011-08-08 | 2011-08-08 | Measurement protective device of submersible pump motor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103018780B (en) * | 2012-12-31 | 2015-11-04 | 中国科学院合肥物质科学研究院 | A kind of Probe-type high-frequency-respoliquid liquid metal leakage detector |
| CN103454048B (en) * | 2013-05-30 | 2016-05-11 | 明达实业(厦门)有限公司 | The testing agency of leaking |
| CN109813373A (en) * | 2019-01-30 | 2019-05-28 | 济南大学 | A kind of detection circuit and detection method of built-in mining diving pump |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6690131B1 (en) * | 1999-08-02 | 2004-02-10 | Kabushiki Kaisha Tokai Rika Denki Seisakusho | Power window switch circuit |
| CN2672933Y (en) * | 2003-12-30 | 2005-01-19 | 彭勇 | Intelligent start controller for water pump |
| CN2716847Y (en) * | 2004-01-16 | 2005-08-10 | 北京工业大学 | An intelligent monitor for submersible motor |
| CN202268679U (en) * | 2011-08-08 | 2012-06-06 | 深圳市亚特尔科技有限公司 | Measuring and protecting device of submersible pump motor |
-
2011
- 2011-08-08 CN CN201110225986.9A patent/CN102290788B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6690131B1 (en) * | 1999-08-02 | 2004-02-10 | Kabushiki Kaisha Tokai Rika Denki Seisakusho | Power window switch circuit |
| CN2672933Y (en) * | 2003-12-30 | 2005-01-19 | 彭勇 | Intelligent start controller for water pump |
| CN2716847Y (en) * | 2004-01-16 | 2005-08-10 | 北京工业大学 | An intelligent monitor for submersible motor |
| CN202268679U (en) * | 2011-08-08 | 2012-06-06 | 深圳市亚特尔科技有限公司 | Measuring and protecting device of submersible pump motor |
Non-Patent Citations (1)
| Title |
|---|
| 潜水排污泵电机漏水保护器;沈正兴;《设备管理与维修》;20011231;第39页 * |
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