CN201758355U - Motor protector - Google Patents
Motor protector Download PDFInfo
- Publication number
- CN201758355U CN201758355U CN2010205010365U CN201020501036U CN201758355U CN 201758355 U CN201758355 U CN 201758355U CN 2010205010365 U CN2010205010365 U CN 2010205010365U CN 201020501036 U CN201020501036 U CN 201020501036U CN 201758355 U CN201758355 U CN 201758355U
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- China
- Prior art keywords
- reactor
- wire rod
- prime
- electric motor
- protective device
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- Expired - Fee Related
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Abstract
The utility model discloses a motor protector, which comprises an input terminal set, an output terminal set, a preceding-stage reactor assembly, a posterior-stage reactor assembly and a three-phase super capacitor. The preceding-stage reactor assembly and the posterior-stage reactor assembly are respectively provided with horizontal axial direction and are arranged in the vertical lower position of the three-phase super capacitor; the preceding-stage reactor assembly comprises a plurality of preceding-stage reactors, the posterior-stage reactor assembly comprises a plurality of posterior-stage reactors, and all the preceding-stage reactors and the posterior-stage reactors are correspondingly arranged and share an iron core; and the three-phase super capacitor is also provided with horizontal axial direction. The utility model has the characteristics that the electric harmonic wave is eliminated, the noise, vibration, and heat productivity of a motor are reduced, the electromagnetic interference can be refrained, sinusoidal wave voltage is output accurately, the torque vibration is removed, and the service life of the motor is prolonged.
Description
Technical field
The utility model relates to AC voltage-stabilizing converter technique field, specifically, relates to a kind of electric motor protective device.
Background technology
Current, using prevailing equipment in the Electric Machine Control is exactly variable frequency drives, frequency converter almost is applied in all industrial occasions, and the typical application occasion comprises: various pumps, air-conditioning system, elevator, lift, conveyer, lathe and various new forms of energy equipment.The operation principle of frequency converter is the voltage by the output pulse width modulation waveform, produces the sinusoidal current of different frequency, the control rotating speed of motor.
The particular theory of operation of frequency converter has caused following three kinds of problems: electric harmonic problem, shortening electrical machinery life problem, electromagnetic interference problem.The harm of three kinds of problems:
The electric harmonic problem is to have the rectifier of frequency converter front end to produce, and the ac/ac power converter of any band direct current smoothing capacity all can produce harmonic current problem in various degree when work.The harm of harmonic wave earth-current is, when it flows into public electric wire net, under the effect of electric network impedance, produce harmonic voltage (Ohm's law), cause the grid voltage waveform distortion, thereby other equipment on the interference electrical network, in addition, when the high-frequency harmonic electric current transmits on cable and transformer, can cause electric energy loss to increase.Because the variety of problems that harmonic wave brings, power supply department has proposed requirement for restriction to the harmonic current that the user produces, and international standard is IEEE519, GB14549 during domestic standard.
Shortening the electrical machinery life problem is to have very high frequency by problem, PWM waveform that the PWM waveform voltage that frequency conversion is exported causes, these high frequency voltage compositions are to causing the loss of electric machine to increase the overshoot voltage problems such as (puncturing the insulating barrier of motor windings) of (causing motor overheating), bearing leakage current excessive (burning bearing), motor side, and these problems have seriously shortened the life-span of motor.Particularly driver is when motor (for example more than the 100M) far away, and overshoot voltage can reach normal voltage more than 2 times, and the winding insulation of motor is formed serious threat.
Electromagnetic interference problem comprises the content of two aspects, and one is that frequency converter injects electromagnetic interference to electrical network, and this interference is different from harmonic current, and its frequency is higher, is commonly referred to as radio frequency interference.This interference can be disturbed other equipment on the electrical network, can produce radiation simultaneously, disturbs the electronic equipment that closes on.The another kind of interference is to have the PWM waveform voltage of frequency converter output to produce, and when PWM voltage transmits on the interconnected driving cable of frequency converter and motor, can produce extremely strong electromagnetic interference (EMI) emissions, and this electromagnetic interference (EMI) emissions forms interference to other electronic equipments that close on.
The utility model content
The purpose of this utility model is to provide a kind of electric motor protective device, uses the electric harmonic that brought, shortens defectives such as electrical machinery life, electromagnetic interference to solve traditional frequency conversion device in the prior art.
The technical problem that the utility model solved can realize by the following technical solutions:
A kind of electric motor protective device comprises input terminal group, lead-out terminal group, prime reactor composition, back level reactor composition and a three-phase electrochemical capacitance, it is characterized in that:
Back level reactor composition is connected to the prime reactor and forms, the three-phase electrochemical capacitance is connected to back level reactor and forms, the input terminal group is connected to the prime reactor and forms, the lead-out terminal group is connected to back level reactor and forms, and a described three-phase electrochemical capacitance has the axial of horizontal direction, prime reactor composition also has the axial of horizontal direction respectively with back level reactor composition, and the prime reactor is formed with back level reactor and is formed the vertical lower position that is arranged on a three-phase electrochemical capacitance, the prime reactor is formed and is comprised a plurality of prime reactors, back level reactor is formed and is comprised a plurality of backs level reactor, each prime reactor and corresponding the setting and a shared iron core of each back level reactor.
Electric motor protective device of the present utility model; comprise input terminal group, lead-out terminal group, prime reactor composition, back level reactor composition and a three-phase electrochemical capacitance; has the elimination electric harmonic; reduce noise of motor, vibration and caloric value; can suppress electromagnetic interference; accurately sine wave output voltage is eliminated the moment shake, prolongs characteristics such as electrical machinery life.
Description of drawings
The reader will become apparent various aspects of the present utility model after the reference accompanying drawing has been read embodiment of the present utility model.Wherein:
Fig. 1 is the schematic perspective view of the utility model electric motor protective device primary structure;
Fig. 2 is the schematic perspective view that the utility model prime reactor is formed and back level reactor is formed.
Primary clustering symbol description in the accompanying drawing
Lead-out terminal group 12 lead-out terminals 121,122,123
The prime reactor is formed 13 first reactors 131
Back level reactor is formed 14 the 4th reactors 141
The 5th reactor 142 the 6th reactor 143
Three-phase electrochemical capacitance 15
Iron core 161,162,163 silicon steel sheets 167
First wire rod, 21 second wire rods 22
First wire rod twines core length H
Second wire rod twines core length h
Embodiment
With reference to the accompanying drawings, the specific embodiment of the present invention is described in further detail.
As shown in Figure 1, the utility model comprises input terminal group 11, lead-out terminal group 12, prime reactor composition 13,14 and three-phase electrochemical capacitances 15 of back level reactor composition.Back level reactor is formed 14 and is connected to prime reactor composition 13, a three-phase electrochemical capacitance 15 is connected to back level reactor and forms 14, input terminal group 11 is connected to the prime reactor and forms 13, lead-out terminal group 12 is connected to back level reactor and forms 14, a described three-phase electrochemical capacitance 15 has the axial of horizontal direction, the prime reactor form 13 with back level reactor form 14 also have respectively horizontal direction axially, and the prime reactor is formed 13 and is formed the 14 vertical lower positions that are arranged on a three-phase electrochemical capacitance 15 with back level reactor.See through above-mentioned configuration, can reach preferable space and save effect.
In order to adapt to three-phase alternating current, as shown in Figure 1, prime reactor described in the utility model is formed 13 and is comprised a plurality of prime reactors, is respectively first reactor 131, second reactor 132 and the 3rd reactor 133; Back level reactor is formed 14 and is comprised a plurality of backs level reactor, is respectively the 4th reactor 141, the 5th reactor 142 and the 6th reactor 143.First reactor 131, second reactor 132 all use identical material, long-pending first wire rod winding iron core of same cross-sectional with the 3rd reactor 133, to reach same size; The 4th reactor 141, the 5th reactor 142 use identical material, long-pending second wire rod winding iron core of same cross-sectional with the 6th reactor 143, to reach same size; Wherein, first wire rod can be identical with second wire rod, also can be different.Further, in order to reach preferable effect, the 4th reactor 141 and first reactor, 131 shared iron cores 161, the 5th reactor 142 and second reactor, 132 shared iron cores 162, the 6th reactor 143 and the 3rd reactor 133 shared iron cores 163, described each iron core 161,162,163 has identical material, same cross-sectional is long-pending, to reach same size.In the present embodiment, input terminal group 11 further includes three input terminals 111,112,113, is connected to the prime reactor respectively and forms 13 first reactor 131, second reactor 132 and the 3rd reactor 133.Lead-out terminal group 12 includes three lead-out terminals 121,122,123, is connected to back level reactor respectively and forms 14 the 4th reactor 141, the 5th reactor 142 and the 6th reactor 143.
As shown in Figure 2, each iron core 161 (162 or 163) is repeatedly to put be combined into by a plurality of silicon steel sheets 167.Electric motor protective device described in the utility model further includes resin plate 17; each reactor is provided with a pair of resin plate 17 in the present embodiment; therefore have three pairs of resin plates 17; each is folded in an iron core 161 (162 or 163) wherein resin plate 17; perhaps; also can utilize other non-magnetic materials; for example replace aforesaid resin plate 17 with stainless sheet steel, each can be closely linked by lock member 18 to resin plate 17 (or stainless sheet steel) and iron core 161 (162 or 163).
As shown in Figure 2, described prime reactor composition 13 uses first wire rod 21 and second wire rod, 22 winding iron cores 161 (162 or 163) respectively with back level reactor composition 14.In order to form the reactance that varies in size, can design the sectional area that the sectional area of first wire rod 21 is different from second wire rod 22, for example, first wire rod 21 uses circular enamelled wire, and second wire rod 22 uses flat enamelled wire, but not as limit.Moreover, in order to form the reactance that varies in size, also can design and the prime reactor is formed in 13 the length H that twines iron cores with first wire rod 21 form the length h that twines iron cores in 14 with second wire rod 22 greater than back level reactor.In addition, each reactor surface coverage has insulation to coat, and is not worn, makes moist and the effect of oxidation with the wire rod that plays each reactor composition of protection.
The above is a better embodiment of the present invention only, is not in order to limit interest field of the present invention; Simultaneously above description should be understood and be implemented for those skilled in the art, so other does not break away from the equivalence of being finished under the disclosed spirit and change or modification, all should be included in the claim scope of application.
Claims (10)
1. an electric motor protective device consists predominantly of input terminal group, lead-out terminal group, prime reactor composition, back level reactor composition and a three-phase electrochemical capacitance, it is characterized in that:
This back level reactor composition is connected to this prime reactor and forms;
This three-phase electrochemical capacitance is connected to this back level reactor and forms;
This input terminal group is connected to this prime reactor and forms;
This lead-out terminal group is connected to this back level reactor and forms;
This prime reactor is formed and is comprised a plurality of prime reactors, and this back level reactor is formed and comprised a plurality of backs level reactor, each prime reactor and corresponding the setting and a shared iron core of each back level reactor; And
This prime reactor composition, back level reactor form and the three-phase electrochemical capacitance has the axial of horizontal direction all respectively, and this prime reactor is formed the vertical lower position that all is arranged on this three-phase electrochemical capacitance with back grade reactor composition.
2. according to the described electric motor protective device of claim 1, it is characterized in that: this prime reactor is formed and is comprised first reactor, second reactor and the 3rd reactor; This back level reactor is formed and is comprised the 4th reactor, the 5th reactor and the 6th reactor; And the 4th reactor and the same iron core of this first reactor common, the 5th reactor and the same iron core of this second reactor common, the 6th reactor and the same iron core of the 3rd reactor common, each iron core is repeatedly to put be combined into by a plurality of silicon steel sheets.
3. according to the described electric motor protective device of claim 2, it is characterized in that: this electric motor protective device further comprises three pairs of resin plates, and each is folded in an iron core wherein resin plate.
4. according to the described electric motor protective device of claim 2, it is characterized in that: this electric motor protective device further comprises three pairs of stainless sheet steels, and each is folded in an iron core wherein stainless sheet steel.
5. according to the described electric motor protective device of claim 2, it is characterized in that: this prime reactor is formed use first wire rod and is twined iron core, and this back level reactor is formed use second wire rod and twined iron core.
6. according to the described electric motor protective device of claim 5, it is characterized in that: this first wire rod is identical wire rod with second wire rod.
7. according to the described electric motor protective device of claim 5, it is characterized in that: the wherein a kind of of this first wire rod and second wire rod is flat enamelled wire.
8. according to the described electric motor protective device of claim 5, it is characterized in that: the wherein a kind of of this first wire rod and second wire rod is circular enamelled wire.
9. according to the described electric motor protective device of claim 5, it is characterized in that: first wire rod twined the length of the length of iron core greater than second wire rod winding iron core in this back level reactor composition during this prime reactor was formed.
10. according to the described electric motor protective device of claim 5, it is characterized in that: this first wire rod and second wire rod are wire rod inequality.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205010365U CN201758355U (en) | 2010-08-23 | 2010-08-23 | Motor protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205010365U CN201758355U (en) | 2010-08-23 | 2010-08-23 | Motor protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201758355U true CN201758355U (en) | 2011-03-09 |
Family
ID=43645645
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205010365U Expired - Fee Related CN201758355U (en) | 2010-08-23 | 2010-08-23 | Motor protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201758355U (en) |
-
2010
- 2010-08-23 CN CN2010205010365U patent/CN201758355U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: BEIJING DONGZHAN KEBO TECHNOLOGY CO., LTD. Free format text: FORMER NAME: BEIJING DONGZHAN KEBO ELECTRONIC CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 100039, 36, Fuxing Road, Beijing, Haidian District, A2 section, 812 room Patentee after: Beijing Dongzhan Kebo Technology Co., Ltd. Address before: 100039, 36, Fuxing Road, Beijing, Haidian District, A2 section, 812 room Patentee before: Beijing Dongzhan Kebo Electronic Co., Ltd. |
|
| DD01 | Delivery of document by public notice |
Addressee: Beijing Dongzhan Kebo Technology Co., Ltd. Document name: Notification to Pay the Fees |
|
| DD01 | Delivery of document by public notice |
Addressee: Wang Wei Document name: Notification of Termination of Patent Right |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110309 Termination date: 20130823 |