CN202651998U - Series machine - Google Patents

Series machine Download PDF

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Publication number
CN202651998U
CN202651998U CN2012201789675U CN201220178967U CN202651998U CN 202651998 U CN202651998 U CN 202651998U CN 2012201789675 U CN2012201789675 U CN 2012201789675U CN 201220178967 U CN201220178967 U CN 201220178967U CN 202651998 U CN202651998 U CN 202651998U
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CN
China
Prior art keywords
exciting coil
magnet exciting
ptc thermistor
series machine
clip
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN2012201789675U
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Chinese (zh)
Inventor
李力
蒲润昌
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenzhen Wondhope Electric Co ltd
Original Assignee
Shenzhen Wondhope Electric Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Priority to CN2012201789675U priority Critical patent/CN202651998U/en
Application granted granted Critical
Publication of CN202651998U publication Critical patent/CN202651998U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model discloses a series machine. The series machine comprises a series machine stator, a series machine rotor, a magnet exciting coil and a PTC thermistor. The PTC thermistor is serially connected into the magnet exciting coil, and the PTC thermistor is in thermal contact with the magnet exciting coil. According to the utility model, good overcurrent protection performance and good over-temperature protection performance are realized at the same time to replace bimetallic temperature controller over-temperature protection performance and thermal fuse overcurrent protection performance in the traditional technology, and advantages of low production cost, simple structure, economization, environmental protection, good practicability and wide market application prospect are realized.

Description

Series machine
Technical field
The utility model relates to overheat protector and the overcurrent protection field of motor, relates in particular to a kind of series machine.
Background technology
PTC is a kind of thermistor of self recovery, can be divided into ceramic PTC and high molecular PTC, and its temperature resistance characteristic can extraordinaryly be applied to circuit overcurrent, overheat protector field.When running current passed through, PTC was low resistive state.And when in the circuit unusual overcurrent being arranged, PTC is high-impedance state.Only have after overcurrent in the circuit disappears, it is normal that PTC recovers, and is again low resistive state.
Directional series excitation electric machine is comprised of magnet exciting coil, rotor, carbon brush, carbon brush holder etc., when motor works long hours or load is excessive even occur in the situation of stall, electric current by motor coil can increase, and coil temperature is risen, until cause burning of whole motor.The security incident that the motor burning causes is of common occurrence; so countries in the world have strict and harsh safety to require the series machine in the conventional art to adopt bimetal strip thermostat to do over-temperature protection to motor more; the protection of overload or overcurrent or stall then needs the protective circuit of in addition design complexity to finish; and bimetallic temperature controller has the contact; easily produce the out of control and EMI of adhesion and disturb that (bimetallic temperature controller does not possess the maintenance function; when the fault of motor is not got rid of; can again power to motor; make motor under failure condition, repeatedly work).
Novel series machine of the prior art is because of cost and process technology limit; many application copper-clad aluminum conductors or aluminum steel coiling; silicon steel sheet is folded thick also to be reduced; thermal capacity diminishes; the applicant is by long-term application in practice; find that temperature sharply raises when overload, overcurrent, the generation of stall situation, at this moment traditional bimetallic temperature controller can't be protected too slowly because of reaction.
For these reasons; be necessary the structure of novel series machine is further improved; so that novel series machine reaches the misgivings of disturbing without MEI, finish simultaneously series machine and product that series machine arranged are protected in overcurrent, excess temperature, overload, the stall situation timely occurring.
The utility model content
The utility model mainly provides a kind of series machine; novel series machine is used copper-clad aluminum conductor or aluminum steel coiling because of cost and process technology limit more in the solution prior art, and silicon steel sheet is folded thick also to be reduced; thermal capacity diminishes, the problem that traditional bimetallic temperature controller can't be protected too slowly because of reaction.
For solving the problems of the technologies described above, the technical scheme that this new utility model adopts is: a kind of magnet exciting coil is provided, comprise motor stator, rotor and magnet exciting coil, also comprise a PTC thermistor, described PTC thermistor is serially connected with in the magnet exciting coil, and described PTC thermistor and magnet exciting coil thermo-contact.
Wherein, also comprise one for the fixture that the PTC thermistor is fixed on the magnet exciting coil, the Surface Contact of described PTC thermistor and magnet exciting coil.
Wherein, also comprise one for the fixture that the PTC thermistor is fixed on the magnet exciting coil, be folded with thermal conductive insulation glue between described PTC thermistor and the magnet exciting coil.
Wherein, described thermal conductive insulation glue is heat conductive silica gel.
Wherein, described fixture is binding strap.
Wherein, described fixture is a clip, and a pinch of described clip is close to magnet exciting coil, and another pinch of described clip is close to the PTC thermistor.
Wherein, the material of described clip is plastics.
Wherein, described fixture is a metal clip, is provided with insulating barrier between described metal clip and magnet exciting coil and the PTC thermistor, and described insulating barrier is wrapped in magnet exciting coil and PTC thermistor.
Wherein, described PTC thermistor is serially connected with the end of magnet exciting coil.
The beneficial effects of the utility model are: be different from the novel series machine of prior art because of cost and process technology limit; many application copper-clad aluminum conductors or aluminum steel coiling; silicon steel sheet is folded thick also to be reduced; thermal capacity diminishes; the problem that traditional bimetallic temperature controller can't be protected too slowly because of reaction; a kind of series machine of the utility model is serially connected with the PTC thermistor in the magnet exciting coil in the series machine by adopting, equating with size of current in the magnet exciting coil through the electric current of PTC thermistor after the series connection.In the magnet exciting coil electric current when excessive; the faradic variation of PTC thermistor; make its resistance value become large; to flow through in the series machine the interior resistive in magnet exciting coil loop large thereby make, and loop current reduces, and the magnet exciting coil of series machine is played the effect of current protection; circuit after the protection of PTC thermistor; only after fault was got rid of, after outage recovered the cooling of PTC thermistor again, series machine just can be reworked.The utility model also adopts PTC thermistor and magnet exciting coil thermo-contact; the series machine work that works for a long time can make the temperature of magnet exciting coil wherein progressively raise; when the temperature of magnet exciting coil surpasses default temperature; the variation of PTC thermistor temperature sensor; make its resistance become large, to flow through in the series machine the interior resistive in magnet exciting coil loop large thereby make, and loop current reduces; can play to magnet exciting coil the effect of temperature protection, prevent that magnet exciting coil is burned.In sum, the utility model has better overcurrent protection and the performance of overheat protector simultaneously, replaces overheat protector and the Thermal Cutoffs overcurrent protection of bimetallic temperature controller in the conventional art; production cost is low, and structure is simplified, and saves environmental protection; practical, have wide market application foreground.
Description of drawings
Fig. 1 is the structural representation of the utility model series machine;
Fig. 2 is the structural representation of the utility model one embodiment;
Fig. 3 is the structural representation of another embodiment of the utility model;
Fig. 4 is the circuit theory diagrams of the utility model series machine.
Label declaration:
The 1-series machine, 10-motor stator, 11-rotor, 13-magnet exciting coil, 14-fixture, 15-PTC thermistor, 16-thermal conductive insulation glue, 17-carbon brush holder, 18-motor shaft, 19-commutator, 20-insulating barrier.
Embodiment
By describing technology contents of the present utility model, structural feature in detail, being realized purpose and effect, below in conjunction with execution mode and cooperate accompanying drawing to give in detail explanation.
See also Fig. 1 and Fig. 4, a kind of series machine of the utility model, comprise motor stator 10, rotor 11, motor shaft 18, carbon brush holder 17, commutator 19 and magnet exciting coil 13, also comprise a PTC thermistor 15, described PTC thermistor 15 is serially connected with the end of magnet exciting coil 13, and described PTC thermistor 15 and magnet exciting coil 13 thermo-contacts, wherein, thermo-contact refers to that magnet exciting coil 13 can carry out the heat conduction with PTC thermistor 15, the heat of magnet exciting coil 13 can pass to PTC thermistor 15, so that the variations in temperature of PTC thermistor 15 accurate induced excitation coils 13, Fig. 4 is the circuit theory diagrams of the utility model series machine, and PTC thermistor 15 is serially connected with in the series machine 1.
Consult Fig. 2, in a specific embodiment, PTC thermistor 15 is fixing by fixture 14 with magnet exciting coil 13, the Surface Contact of PTC thermistor 15 and magnet exciting coil 13.Series machine is worked for a long time; the temperature of magnet exciting coil 13 can rise gradually; because the Surface Contact of magnet exciting coil 13 and PTC thermistor 15; magnet exciting coil 13 is passed to PTC thermistor 15 with its temperature; the variation of PTC thermistor 15 temperature sensors; and changed to high resistant by low-resistance according to the rising of the temperature resistance value with self, reach protection magnet exciting coil 13, prevent the effect that magnet exciting coil 13 is burned.
Consult Fig. 3, in another embodiment, PTC thermistor 15 is fixing by fixture 14 with magnet exciting coil 13, is provided with thermal conductive insulation glue 16 between the PTC thermistor 15 of series machine and the magnet exciting coil 13.Concrete; thermal conductive insulation glue 16 is heat conductive silica gels; PTC thermistor 15 is by heat conductive silica gel and magnet exciting coil 13 thermo-contacts; greatly increased the effective area of thermo-contact; can make the variation of PTC thermistor 15 accurate induced excitation coil 13 temperature; so that PTC thermistor 15 in time with self resistance value from low resistive state to the high-impedance state adjustment, more be conducive to protect magnet exciting coil.
Above-mentioned fixture 14 is binding strap, and binding strap passes the space that magnet exciting coil 13 surrounds, and all sides that are around in magnet exciting coil 13 and PTC thermistor 15 are with magnet exciting coil 13 and 15 bindings of PTC thermistor.Binding strap is tied up the mode of solid magnet exciting coil 13 and PTC thermistor 15, simple to operate, production cost is low, and efficient is high, above-mentioned fixture 14 is plastics clip also, one pinch of described clip is close to magnet exciting coil 13, another pinch of described clip is close to PTC thermistor 15, the plastic clip anchor clamps have simple to operate, fixing effect is better, above-mentioned fixture 14 can also be the metal clip, is provided with insulating barrier 20 between metal clip and magnet exciting coil 13 and the PTC thermistor 15, and insulating barrier 20 is wrapped in magnet exciting coil and PTC thermistor.Insulating barrier 20 can be the oilpaper layer, mainly plays isolating metal clip and magnet exciting coil 13 and PTC thermistor 15, prevents that the metal clip from contacting with magnet exciting coil 13 and the direct of PTC thermistor 15, avoids the problem that occurs leaking electricity.
In the above-described embodiments, be assembling and the production that makes things convenient for series machine, PTC thermistor 15 can be serially connected with the end of magnet exciting coil 13, series excitation coil can be by existing technological process production like this, can be easy to operation in the end during serial connection PCT thermistor.Certainly as other positions that as purpose PTC thermistor 15 are serially connected in magnet exciting coil 13 take protection magnet exciting coil 13, also all be carrying into execution a plan of the present embodiment.
Other overload phenomenon also can appear in series machine in the prior art; such as stall overload, stall overload etc.; when the electric current of its generation and temperature surpass predetermined value, also can by the respective change protection magnet exciting coil of PTC thermistor, improve the reliability and security of series machine.When stall overload refers to the motor operation, might occur stopping up, load increases the weight of or other mechanical breakdowns, causes motor stall slack-off.When motor stall was slack-off, coil current can increase greatly, and temperature can raise gradually, continued supply power and can cause the damage of motor or the damage of drive unit.The stall overload refers to be stuck when motor, and in the time of can not rotating fully, coil current will increase severely, and temperature also will increase severely, and continues supply power and can cause the damage of motor or the damage of drive unit.
The utility model is different from the novel series machine of prior art because of cost and process technology limit; many application copper-clad aluminum conductors or aluminum steel coiling; silicon steel sheet is folded thick also to be reduced; thermal capacity diminishes; the problem that traditional bimetallic temperature controller can't be protected too slowly because of reaction; a kind of series machine of the utility model is serially connected with the PTC thermistor in the magnet exciting coil in the series machine by adopting, equating with size of current in the magnet exciting coil through the electric current of PTC thermistor after the series connection.In the magnet exciting coil electric current when excessive; the faradic variation of PTC thermistor; make its resistance value become large; to flow through in the series machine the interior resistive in magnet exciting coil loop large thereby make, and loop current reduces, and the magnet exciting coil of series machine is played the effect of current protection; circuit after the protection of PTC thermistor; only after fault was got rid of, after outage recovered the cooling of PTC thermistor again, series machine just can be reworked.The utility model also adopts PTC thermistor and magnet exciting coil thermo-contact; the series machine work that works for a long time can make the temperature of magnet exciting coil wherein progressively raise; when the temperature of magnet exciting coil surpasses default temperature; the variation of PTC thermistor temperature sensor; make its resistance become large, to flow through in the series machine the interior resistive in magnet exciting coil loop large thereby make, and loop current reduces; can play to magnet exciting coil the effect of temperature protection, prevent that magnet exciting coil is burned.In sum, the utility model has better overcurrent protection and the performance of overheat protector simultaneously, replaces overheat protector and the Thermal Cutoffs overcurrent protection of bimetallic temperature controller in the conventional art; production cost is low, and structure is simplified, and saves environmental protection; practical, have wide market application foreground.
The above only is embodiment of the present utility model; be not so limit claim of the present utility model; every equivalent structure transformation that utilizes the utility model specification and accompanying drawing content to do; or directly or indirectly be used in other relevant technical fields, all in like manner be included in the scope of patent protection of the present utility model.

Claims (9)

1. a series machine comprises motor stator, rotor and magnet exciting coil, it is characterized in that, also comprises a PTC thermistor, and described PTC thermistor is serially connected with in the magnet exciting coil, and described PTC thermistor and magnet exciting coil thermo-contact.
2. series machine according to claim 1 is characterized in that, also comprises one for the fixture that the PTC thermistor is fixed on the magnet exciting coil, the Surface Contact of described PTC thermistor and magnet exciting coil.
3. series machine according to claim 1 is characterized in that, also comprises one for the fixture that the PTC thermistor is fixed on the magnet exciting coil, is folded with thermal conductive insulation glue between described PTC thermistor and the magnet exciting coil.
4. series machine according to claim 3 is characterized in that, described thermal conductive insulation glue is heat conductive silica gel.
5. each described series machine is characterized in that according to claim 2~4, and described fixture is binding strap.
6. each described series machine is characterized in that according to claim 2~4, and described fixture is a clip, and a pinch of described clip is close to magnet exciting coil, and another pinch of described clip is close to the PTC thermistor.
7. series machine according to claim 6 is characterized in that, the material of described clip is plastics.
8. series machine according to claim 6 is characterized in that, described fixture is a metal clip, is provided with insulating barrier between described metal clip and magnet exciting coil and the PTC thermistor, and described insulating barrier is wrapped in magnet exciting coil and PTC thermistor.
9. series machine according to claim 1 is characterized in that, described PTC thermistor is serially connected with the end of magnet exciting coil.
CN2012201789675U 2012-04-24 2012-04-24 Series machine Expired - Fee Related CN202651998U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2012201789675U CN202651998U (en) 2012-04-24 2012-04-24 Series machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2012201789675U CN202651998U (en) 2012-04-24 2012-04-24 Series machine

Publications (1)

Publication Number Publication Date
CN202651998U true CN202651998U (en) 2013-01-02

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN2012201789675U Expired - Fee Related CN202651998U (en) 2012-04-24 2012-04-24 Series machine

Country Status (1)

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CN (1) CN202651998U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111740557A (en) * 2019-03-25 2020-10-02 奥迪股份公司 Method for producing a component
CN112234580A (en) * 2020-10-22 2021-01-15 山东臣乔电气科技股份有限公司 Motor protector and control method thereof

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111740557A (en) * 2019-03-25 2020-10-02 奥迪股份公司 Method for producing a component
US11489412B2 (en) 2019-03-25 2022-11-01 Audi Ag Method for producing a component
CN112234580A (en) * 2020-10-22 2021-01-15 山东臣乔电气科技股份有限公司 Motor protector and control method thereof
CN112234580B (en) * 2020-10-22 2022-07-22 山东臣乔电气科技股份有限公司 Motor protector and control method thereof

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Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20130102

Termination date: 20160424

CF01 Termination of patent right due to non-payment of annual fee