CN1885684A - Asynchronous AC motor rotor broken-bar detecting method and its device - Google Patents
Asynchronous AC motor rotor broken-bar detecting method and its device Download PDFInfo
- Publication number
- CN1885684A CN1885684A CN 200510026985 CN200510026985A CN1885684A CN 1885684 A CN1885684 A CN 1885684A CN 200510026985 CN200510026985 CN 200510026985 CN 200510026985 A CN200510026985 A CN 200510026985A CN 1885684 A CN1885684 A CN 1885684A
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- rotor
- bar
- asynchronous
- transducer
- measured
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- Manufacture Of Motors, Generators (AREA)
- Tests Of Circuit Breakers, Generators, And Electric Motors (AREA)
Abstract
The breaking detection for rotor of asynchronous ac generator comprises: rotating the target rotor, putting the sensor made of magnetic iron-core coiling near the target, displaying output waveform on an oscilloscope, and deciding whether there is broken rotor by continuity of waveform pulse. This invention is accurate and convenient.
Description
Technical field
The present invention relates to motor, particularly the detection method of asynchronous AC motor rotor and equipment.
Background technology
At present, make the cage rotor of asynchronous AC motor, be after stamping forming silicon steel sheet is stacked, rivets, be placed in the mould, with die casting machine aluminium die casting is advanced to form the cage bar in the slot for winding of silicon steel sheet or the hole, and, form the cage type winding at the cage circle that formation of the two ends of rotor and cage bar connect as one.Because at press casting procedure, the influence of factors such as the temperature of aluminium, pressure and runner size, the flow direction easily causes the local vacancy of the cage bar moulding fully in the winding hole, promptly disconnected bar phenomenon.In the structure of various rotors, that silicon steel sheet adopts trench structure because slot for winding is for opening wide shape, and die casting can see the cage bar outer that is in rotor in back well, can inspect out by outward appearance to have or not disconnected bar; And adopt pass structure because the winding hole is in the inside of rotor, die casting back cage bar well is hidden in the winding hole, can't detect by outward appearance and judge.Rotor broken bar can cause the motor rotation imbalance, and power descends, and causes and can't work when serious.Can only make the parameters such as power output, torque of back testing of electric motors at present at the motor complete machine, judge by rule of thumb, and can't detect the rotor monomer.
Summary of the invention
It is a kind of to rotor monomer method and the equipment thereof that bar detects that breaks that the object of the invention is to provide, and uses with convenient.
Method of the present invention is: drive rotor uniform rotation to be measured, and vertical the transducer that constitutes at the magnetive cord coiling near rotor to be measured, use the waveform of oscilloscope detecting sensor output, judge by the continuity of waveform pulse to have or not disconnected bar.
Checkout equipment is: be provided with rotor field spider on support, rotor field spider is provided with motor, and machine shaft is provided with chuck, and transducer is located to be pressed close on the support and perpendicular to the position of rotor to be measured, transducer adopts at the magnetive cord coiling and constitutes, and coil is connected with oscillographic input.
Advantage of the present invention is: during rotor rotation, the magnetic line of force of magnetive cord in the cage bar cutting transducer wherein, produce induced current, the coil of the action of a magnetic field in transducer that this induced current produces, produce induced signal on the coil, because the rotation of rotor, every cage bar effect in turn, the signal that produces on the coil is transferred in the oscilloscope, oscilloscope demonstrates corresponding impulse waveform, by the continuity of observed pulse shape, can judge to have or not disconnected bar to have advantage intuitively accurate, easy to use.
Description of drawings
The invention will be further described with embodiment with reference to the accompanying drawings below.
Fig. 1 is the structural scheme of mechanism of support part of the present invention.
Fig. 2 is a circuit connection diagram of the present invention.
Mark among the figure: 1 motor, 2 rotor field spiders, 3 chucks, 4 rotors to be measured, 5 thimbles, 6 transducers, 7 supports, 8 oscilloscopes, 9 connecting lines.11 machine shafts wherein, 41 armature spindles, the cage bar of 42 rotors, the magnetive cord of 61 transducers, the coil of 62 transducers.
Embodiment
Referring to Fig. 1 and 2, the method that embodiment adopts is: drive rotor 4 uniform rotation to be measured with motor 1, the transducer 6 that coiling on magnetive cord 61 62 is constituted is vertical near rotor 4 to be measured, with the waveform of oscilloscope 8 detecting sensors output, judge by the continuity of waveform pulse to have or not disconnected bar.
The equipment that uses comprises support 7, motor 1, transducer 6, oscilloscope 8, on support 7, be provided with rotor field spider 2, rotor field spider 2 is provided with motor 1, machine shaft 11 is provided with chuck 3, transducer 6 is located to be pressed close on the support 7 and perpendicular to the position of rotor 4 to be measured, transducer 6 adopts coiling 62 formations on magnetive cord 61, and coil 62 is connected with the input of oscilloscope 8.
During use, rotating shaft 41 1 ends of rotor 4 to be measured are clipped in the chuck 3, the other end is used thimble 5 jack-up that are located on the rotor field spider 2, be erected on the rotor field spider 2, transducer 6 can be regulated along the radial expansion of rotor 4 to be measured on support 7, regulate transducer 6 this moment, make it near rotor 4 to be measured, connect motor power, motor 1 drives rotor 4 uniform rotation to be measured.
The magnetic line of force of magnetive cord 61 in the cage bar 42 cutting transducers 6 in the rotor 4 to be measured, produce induced current, because cage bar 42 moves with respect to transducer 6, the magnetic field that its induced current produces reacts on the coil 62 in the transducer 6, makes on the coil 62 and produces induced signal.Because the rotation of rotor 4 to be measured, every cage bar 42 effect in turn produces at interval consecutive pulses signal uniformly on the coil 62, this signal is transferred in the oscilloscope 8, oscilloscope 8 demonstrates corresponding impulse waveform, by the continuity of observed pulse shape, can judge to have or not disconnected bar.If disconnected bar, the pulse spacing is even, continuous, waveform is consistent; If disconnected bar is arranged, then impulse waveform is inhomogeneous, interrupted at interval, by observed pulse shape, can judge to have or not disconnected bar.
Claims (2)
1. the method that detects of an asynchronous AC motor rotor broken-bar, it is characterized in that: drive rotor to be measured (4) uniform rotation, go up the vertical close rotor to be measured (4) of transducer (6) that coiling (62) constitutes at magnetive cord (61), with the waveform of oscilloscope (8) detecting sensor (6) output, judge by the continuity of waveform pulse to have or not disconnected bar.
2. according to claim 1, the equipment that asynchronous AC motor rotor broken-bar detects, it is characterized in that: support (7) is provided with rotor field spider (2), rotor field spider (2) is provided with motor (1), machine shaft (11) is provided with chuck (3), transducer (6) is located to be pressed close on the support (7) and perpendicular to the position of rotor to be measured (4), transducer (6) adopts at magnetive cord (61) coiling (62) and constitutes, and coil (62) is connected with the input of oscilloscope (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510026985 CN1885684A (en) | 2005-06-22 | 2005-06-22 | Asynchronous AC motor rotor broken-bar detecting method and its device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510026985 CN1885684A (en) | 2005-06-22 | 2005-06-22 | Asynchronous AC motor rotor broken-bar detecting method and its device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1885684A true CN1885684A (en) | 2006-12-27 |
Family
ID=37583701
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510026985 Pending CN1885684A (en) | 2005-06-22 | 2005-06-22 | Asynchronous AC motor rotor broken-bar detecting method and its device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1885684A (en) |
-
2005
- 2005-06-22 CN CN 200510026985 patent/CN1885684A/en active Pending
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |