CN103217582A - System for detecting internal resistance of three-phase motor of electric water pump - Google Patents
System for detecting internal resistance of three-phase motor of electric water pump Download PDFInfo
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- CN103217582A CN103217582A CN2013101221327A CN201310122132A CN103217582A CN 103217582 A CN103217582 A CN 103217582A CN 2013101221327 A CN2013101221327 A CN 2013101221327A CN 201310122132 A CN201310122132 A CN 201310122132A CN 103217582 A CN103217582 A CN 103217582A
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Abstract
The invention discloses a system for detecting the internal resistance of a three-phase motor of an electric water pump. The system mainly comprises a combined switch (1), a central processor, a storage unit, a setting unit, a work condition switching unit, a detection control device and a display device, wherein the central processor and the storage unit are electrically connected with the setting unit, the work condition switching unit, the detection control device and the display device; an input terminal of the detection control device is connected with an output terminal of the combined switch (1); the combined switch (1) consists of three normally-open switches K1, K2 and K3 and is provided with three input terminals and two output terminals, and the switches K1, K2 and K3 of the combined switch (1) are provided with interlocking mechanisms; the three input terminals of the combined switch (1) are respectively connected with wiring terminals A, B and C of three windings of the three-phase motor; and the central processor and the storage unit are provided with external interfaces. The system has the advantages of simple and reasonable structure, simplicity and convenience in operation and high safety performance.
Description
Technical field
The present invention relates to the detection system of a kind of electric water pump threephase motor internal resistance.
Background technology
The three-phase electric water pump all is used widely in industry, agricultural and family, and the user often feels to be difficult to after the threephase motor winding of electric water pump goes wrong to find, causes leading to heavy losses.The main method of at present resistance of motor winding being checked is, motor is disassembled from electrical network, detects the internal resistance of three terminals of ABC then with universal meter, and whether assess winding in conjunction with star-like or delta connection and the internal resistance value that records good.Its weak point: need the professional to disassemble from electrical network, install again then, time-consuming, the general user is difficult to accomplish.
Summary of the invention
The objective of the invention is to overcome deficiency of the prior art, providing a kind of does not need the professional to operate, do not need motor is disassembled from electrical network yet, easy to operate simple, the detection system of the electric water pump threephase motor internal resistance that electrical safety performance is high.
Purpose of the present invention is achieved by following technical proposals:
Mainly by combined switch, central processing unit and storage element, unit, operating mode switch unit, measuring and controlling device and display device be set form, described central processing unit and storage element with unit, operating mode switch unit, measuring and controlling device and display device be set be electrically connected; The input end of described measuring and controlling device connects the output terminal of combined switch; Described combined switch is made up of three K switch 1, K2 and K3 that often open type, and three input terminals and two lead-out terminals are arranged, and K switch 1, K2 and the K3 of combined switch are provided with mutual interlocking gear; Three input terminals of described combined switch connect A, the B of three windings of threephase motor and the connection terminal of C respectively; Described central processing unit and storage element are provided with external interface.
Motor outage detection unit is set in the described measuring and controlling device, and the sensor of motor outage detection unit is installed in the power main switch of threephase motor.
Touring switch triggering unit is set in the described measuring and controlling device, and touring switch triggering unit is electrically connected with K switch 1, K2 and K3 electric control system separately, touring switch triggering unit and power main switch interlocking.
The output terminal of described central processing unit and storage element is provided with warning device.
In described central processing unit and the storage element special software is installed.
Compared with prior art, the present invention has the following advantages: simple structure is reasonable, and is simple to operation, the security performance height.
Description of drawings
Fig. 1 is the structure block diagram of one embodiment of the invention.
Among the figure: the 1-combined switch.
Embodiment
The invention will be further described below in conjunction with drawings and Examples:
Mainly by combined switch 1, central processing unit and storage element, unit, operating mode switch unit, measuring and controlling device and display device be set form, described central processing unit and storage element with unit, operating mode switch unit, measuring and controlling device and display device be set be electrically connected; The input end of described measuring and controlling device connects the output terminal of combined switch 1; Described combined switch 1 is made up of three K switch 1, K2 and K3 that often open type, and three input terminals and two lead-out terminals are arranged, and K switch 1, K2 and the K3 of combined switch 1 are provided with mutual interlocking gear; Three input terminals of described combined switch 1 connect A, the B of three windings of threephase motor and the connection terminal of C respectively; Described central processing unit and storage element are provided with external interface.
Motor outage detection unit is set in the described measuring and controlling device, and the sensor of motor outage detection unit is installed in the power main switch of threephase motor.
Touring switch triggering unit is set in the described measuring and controlling device, and touring switch triggering unit is electrically connected with K switch 1, K2 and K3 electric control system separately, touring switch triggering unit and power main switch interlocking.
The output terminal of described central processing unit and storage element is provided with warning device.
In described central processing unit and the storage element special software is installed.
Described combined switch 1 adopts dotted line to represent in the accompanying drawings, adopts known technology to design and produce or the commercially available prod.
Described central processing unit and storage element are provided with interface, and special software is installed in central processing unit and the storage element, can preserve data and with extraneous swap data.
Described measuring and controlling device has the Data Receiving function, and switch control functions is also arranged, and the Data Receiving function mainly contains motor outage detection unit, and its module and block diagram omit; Switching control section mainly contains touring switch triggering unit, and its module and block diagram omit; Motor outage detection unit and touring switch triggering unit adopt known technology to design and produce or the commercially available prod.
The described unit that is provided with has interactive function, and the unit adopts known technology to design and produce or the commercially available prod.
Described operating mode switch unit mainly be at threephase motor be wye connection or or delta connection be provided with two state positions, adopt known technology to design and produce or the commercially available prod.
Described warning device adopts known technology to design and produce or the commercially available prod.
Embodiment 1:
Combined switch 1 is made up of three K switch 1, K2 and K3 that often open type, and three input terminals and two lead-out terminals are arranged, and K switch 1, K2 and the K3 of combined switch 1 are provided with mutual interlocking gear; Three input terminals of combined switch 1 connect A, the B of three windings of threephase motor and the connection terminal of C respectively, and two lead-out terminals of combined switch 1 are electrically connected with the input end of measuring and controlling device; Measuring and controlling device is electrically connected with central processing unit and storage element, in central processing unit and the storage element special software is installed, central processing unit and storage element also with the unit is set, the operating mode switch unit is electrically connected; The operating mode switch unit has only two states, that is: be that wye connection still is or delta connection is determined state according to threephase motor.The output terminal of measuring and controlling device is electrically connected with display device.In the present embodiment, K switch 1, K2 and the K3 of combined switch 1 are manual switch, and be mechanical interlocked between K switch 1, K2 and the K3, at every turn can only be by next switch, that is: by certain switch when wanting half stroke, two other all gets back to normally open automatically, if loose one's grip this moment, three switches are all got back to normally open.During use, the main power switch of at first confirming motor is in off-state, the line terminals of ABC of the present invention is connected to the ABC terminal of threephase motor with clip or other modes, K switch 1, K2 and K3 are respectively by next time, just can obtain the resistance value of threephase motor winding AB, BC and AC, in conjunction with being that wye connection or delta connection judge always whether winding is good.Present embodiment can be made into handheld.
Embodiment 2:
On the basis of embodiment 1, motor outage detection unit is set in the measuring and controlling device, the sensor of motor outage detection unit is installed in the power main switch of threephase motor.The sensor of motor outage detection unit, motor outage detection unit, power main switch all adopt prior art to design and produce.Present embodiment can be made into handheld.
Embodiment 3:
On the basis of embodiment 2, touring switch triggering unit is set in measuring and controlling device, go the rounds the switch triggering unit and be electrically connected, touring switch triggering unit and power main switch interlocking with K switch 1, K2 and K3 electric control system separately.In the present embodiment, K switch 1, K2 and K3 adopt automatically controlled.As: the button of pressing detection, start working in touring switch triggering unit, according to the order of the setting break-make of trigger switch K1, K2 and K3 one by one, write down the resistance value of threephase motor winding AB, BC and AC automatically, in conjunction with being star-like or delta connection judges always whether winding is good.The device of present embodiment can be produced on various types of electric water pump supervising devices.
Embodiment 4-6:
On the basis of embodiment 1-3, the output terminal of measuring and controlling device is provided with warning device respectively.Warning device is light or acoustic-optic alarm.Embodiment 4-5 is a handle type, and embodiment 6 can be produced on various types of electric water pump supervising devices.
Claims (6)
1. the detection system of electric water pump threephase motor internal resistance, it is characterized in that: mainly by combined switch (1), central processing unit and storage element, unit, operating mode switch unit, measuring and controlling device and display device be set form, described central processing unit and storage element with unit, operating mode switch unit, measuring and controlling device and display device be set be electrically connected; The input end of described measuring and controlling device connects the output terminal of combined switch (1); Described combined switch (1) is made up of three K switch 1, K2 and K3 that often open type, and three input terminals and two lead-out terminals are arranged, and K switch 1, K2 and the K3 of combined switch (1) are provided with mutual interlocking gear; Three input terminals of described combined switch (1) connect A, the B of three windings of threephase motor and the connection terminal of C respectively; Described central processing unit and storage element are provided with external interface.
2. the detection system of electric water pump threephase motor according to claim 1 internal resistance, it is characterized in that: motor outage detection unit is set in the described measuring and controlling device, and the sensor of motor outage detection unit is installed in the power main switch of threephase motor.
3. the detection system of electric water pump threephase motor according to claim 2 internal resistance, it is characterized in that: touring switch triggering unit is set in the described measuring and controlling device, touring switch triggering unit is electrically connected with K switch 1, K2 and K3 electric control system separately, touring switch triggering unit and power main switch interlocking.
4. according to the detection system of the optional described electric water pump threephase motor internal resistance of claim 1-3, it is characterized in that: the output terminal of described central processing unit and storage element is provided with warning device.
5. according to the detection system of the optional described electric water pump threephase motor internal resistance of claim 1-3, it is characterized in that: in described central processing unit and the storage element special software is installed.
6. the detection system of electric water pump threephase motor according to claim 4 internal resistance is characterized in that: in described central processing unit and the storage element special software is installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310122132.7A CN103217582B (en) | 2013-04-10 | 2013-04-10 | System for detecting internal resistance of three-phase motor of electric water pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310122132.7A CN103217582B (en) | 2013-04-10 | 2013-04-10 | System for detecting internal resistance of three-phase motor of electric water pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103217582A true CN103217582A (en) | 2013-07-24 |
| CN103217582B CN103217582B (en) | 2015-03-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310122132.7A Active CN103217582B (en) | 2013-04-10 | 2013-04-10 | System for detecting internal resistance of three-phase motor of electric water pump |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4083001A (en) * | 1976-12-29 | 1978-04-04 | Westinghouse Electric Corporation | Measurement of motor winding temperature |
| JP2003164159A (en) * | 2001-11-29 | 2003-06-06 | Denso Corp | Current detection device for three-phase inverter |
| CN201096839Y (en) * | 2007-10-18 | 2008-08-06 | 武汉铁工科技发展有限公司 | An AC electromotor insulation resistance detection device |
| CN102288827A (en) * | 2011-07-01 | 2011-12-21 | 天津天安起重电器有限公司 | Circuit and methods for detecting resistance value, temperature and state of motor winding in real time |
| CN102866290A (en) * | 2011-07-07 | 2013-01-09 | 天翼经鸿（北京）新能源科技发展有限公司 | Detecting circuit and detecting method for measuring current of motor winding |
| CN203133179U (en) * | 2013-04-10 | 2013-08-14 | 湖南主导科技发展有限公司 | A detecting device of the internal resistance of an electric water pump three-phase motor |
-
2013
- 2013-04-10 CN CN201310122132.7A patent/CN103217582B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4083001A (en) * | 1976-12-29 | 1978-04-04 | Westinghouse Electric Corporation | Measurement of motor winding temperature |
| JP2003164159A (en) * | 2001-11-29 | 2003-06-06 | Denso Corp | Current detection device for three-phase inverter |
| CN201096839Y (en) * | 2007-10-18 | 2008-08-06 | 武汉铁工科技发展有限公司 | An AC electromotor insulation resistance detection device |
| CN102288827A (en) * | 2011-07-01 | 2011-12-21 | 天津天安起重电器有限公司 | Circuit and methods for detecting resistance value, temperature and state of motor winding in real time |
| CN102866290A (en) * | 2011-07-07 | 2013-01-09 | 天翼经鸿（北京）新能源科技发展有限公司 | Detecting circuit and detecting method for measuring current of motor winding |
| CN203133179U (en) * | 2013-04-10 | 2013-08-14 | 湖南主导科技发展有限公司 | A detecting device of the internal resistance of an electric water pump three-phase motor |
Non-Patent Citations (1)
| Title |
|---|
| 孙秋花等: "电机绕组阻值的精密测量", 《大连轻工业学院学报》, vol. 18, no. 4, 31 December 1999 (1999-12-31), pages 329 - 332 * |
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| CN103217582B (en) | 2015-03-25 |
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