CN203166829U - Contactor for switching series-parallel connection mode of motor winding - Google Patents
Contactor for switching series-parallel connection mode of motor winding Download PDFInfo
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- CN203166829U CN203166829U CN 201320070679 CN201320070679U CN203166829U CN 203166829 U CN203166829 U CN 203166829U CN 201320070679 CN201320070679 CN 201320070679 CN 201320070679 U CN201320070679 U CN 201320070679U CN 203166829 U CN203166829 U CN 203166829U
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- normally closed
- closed switch
- switch group
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Abstract
The utility model discloses a contactor for switching series-parallel connection modes of motor windings, so as to realize the series-parallel connection mode switching between salient poles of motor windings which are required for efficient operation of an SR motor at both low and high speed. The contactor comprises a switch contact connecting-disconnecting mechanism, and is characterized by further comprises upper, middle and lower layers of switch groups, the number of switches in each layer of switch group is identical, two layers of switch group are normally opened switch groups, the other layer of switch group is a normally closed switch group, normally opened switch output ends of one-half normally opened switches in the normally opened switch groups are sequentially connected to input ends of normally closed switches in the normally closed switch group in a one-to-one correspondence relation, and normally opened switch input ends of the other one-half normally opened switches are sequentially connected to output ends of the normally closed switches in the normally closed switch group in a one-to-one correspondence relation.
Description
Technical field
The utility model relates to a kind of contactor, relates in particular to a kind of contactor that is exclusively used in changing-over SR motor winding series and parallel mode.
Background technology
The power consumption of motor is about 60% of whole electrical network power consumption according to statistics.Therefore, improving the motor operational efficiency is energy-conservation important behave, especially in the speed adjusting technique application since motor when running on specified high speed stage efficient higher, and in order to satisfy the high, low speed service requirement of driven equipment simultaneously, need by the transmission of mechanical speed change shifter usually.Namely increase mechanical transfer gap and gearing friction loss thus, also reduced efficient and the dynamic response of whole governing system.And be the direct Drive Structure of this motor that produces, its efficient is also just lower at low speed segment.
Electric automobile has been acknowledged as the following automobile of energy-conserving and environment-protective.Any class electric automobile also all needs to drive wheel with motor as actuator and travels, and it is significant therefore to select preferable Drive Structure that electric automobile is applied.Comprehensive dynamics of vehicle, motor drags and multinomial theory analysis such as Control Engineering, adopting wheel hub motor directly to drive electric automobile can conclude and sum up following plurality of advantages: simplify mechanical structure and reduce vehicle-mounted deadweight in order to the vehicle structure layout, can save all huge and heavy mechanical drive trains, vacate big quantity space for the storage battery layout; Reduce automobile barycenter and bodywork height; Improve wheel control fast-response; Easily realize that the four-wheel drive four-wheel steering improves wheel to traction, steering behaviour and recover kinetic energy rate etc., easily realize the more unfeasible various high performance control of traditional car, thereby greatly improve ride safety of automobile, handling and stable.
Also recognize at present the superiority that adopts wheel hub motor directly to drive in the world more and more, states such as American and Britain, method, moral are applied to wheel hub motor on military offroad vehicle and the light tank one after another in recent years, and obtain corresponding achievement.Confirm by theory analysis and practice that namely all the best, the final type of drive of the electric automobile that wheel hub electric motor approved directly driven in explanation both at home and abroad, but thus the speed adjusting performance of motor etc. is also proposed higher unique requirement.At running car in changeable road conditions, and be characteristics such as the energy with storage battery, proposed to directly driving wheel hub electric motor that staring torque is big, starting current is little, short-time overload capacity is strong, dynamic response is fast, can efficient electrification feedback braking, failure tolerant and the high requirement of system reliability.
By permanent-magnet DC brushless, AC frequency conversion vector control and switched reluctance machines being driven the comparative analysis of all kinds of motor speed regulation systems such as SRD, wherein SR motor (switched reluctance motor) is to satisfy above-mentioned unique motor that requires more all sidedly for this reason.Particularly wheel hub motor adopts and directly drives automotive wheel, save conventional all driving-chains such as mechanical reduction, low speed segment operation characteristic to motor has proposed higher unique requirement, bigger output torque is arranged when namely wanting low speed, need limit corresponding electric current again and damage to avoid the storage battery heavy-current discharge.And be that the torque of provable AC and DC motor is lowered into first power with rotating speed and increases by the corresponding electromagnetic theory of motor; And the SR motor torque will become the quadratic power index to increase with the rotating speed reduction, and adopt the copped wave Current limited Control can realize above-mentioned unique requirement at low speed segment.
Non-linear characteristics at the operation of SR motor, utilize computer finite element analysis emulation to obtain AC and DC motor and SR efficiency of motor and speed curves figure again, compare by the simulation curve to this three classes motor, the intrinsic governor control characteristics of brushless permanent magnet motor and threephase asynchronous machine is all higher in high regime efficient as can be known, and this also is the characteristics of most of buncher; And the SR motor can obtain greater efficiency at low speed segment, and by revising the relevant design parameter of motor, also can change the corresponding tachometer value of efficient curved section.But speed was lower when automobile travelled in the urban district usually, and higher at the fastlink speed of operation.In order to make the SR motor all can obtain higher operational efficiency at low speed segment and high regime, every phase winding of SR motor is divided into the sub-winding identical with this phase salient pole number to be wound on this each salient pole under mutually, and every phase winding is changed required wiring by the desired mode that is connected in series with the mode of being connected in parallel in motor stator, draw, carry out changing-over more on request, the contactor in the existing product can not satisfy this demand.
Open day is on 02 13rd, 2002, publication number is that the patent documentation of CN2476874Y discloses the technical scheme that name is called a kind of electromagnetic contactor, it comprises bobbin, coil on the bobbin and the iron core that is positioned at bobbin thereof are cylinder or square body, on the bobbin of coil outside iron core, be positioned at the positive upper and lower of iron core, namely at the anode up and down of corresponding connecting frame a ndfeb magnet that magnetic pole is corresponding is installed respectively, the working power of coil is supplied with by filter rectifier, and its advantage is that coil can not generate heat, working stability, antijamming capability is stronger.But the contactless contactor of this technical scheme is conventional the setting still, and make and break contact is few, the position of switch etc. can not satisfy SR motor winding series and parallel mode changing-over necessary requirement.
The utility model content
The utility model main purpose is a kind of contactor for changing-over motor winding series-parallel system, to realize that the SR motor is low, all can efficiently move desired winding carries out the series and parallel mode between each salient pole switching at a high speed.
The utility model is mainly solved by following technical proposals at the prior art problem, a kind of contactor for changing-over motor winding series-parallel system, comprise that switch contact cut-offs mechanism, also comprise, in, following three layers of switches set, the number of switches of every layer of switches set is identical, wherein two-layer switches set is the normally closed switch group, another layer switches set is the normally closed switch group, in described normally closed switch group each normally closed switch output of 1/2nd normally closed switch is connected to the input of each normally closed switch in the described normally closed switch group according to the order of sequence with one-to-one relationship, the input of each normally closed switch of other 1/2nd normally closed switch is connected to the output of each normally closed switch in the described normally closed switch group according to the order of sequence with one-to-one relationship.
The corresponding connection of switch that to be the switch gone up mutually of A go up mutually with A that one-to-one relationship wherein connects according to the order of sequence, the corresponding connection of switch that the switch that B goes up mutually and B go up mutually, by that analogy.
Switch contact cut-offs mechanism and comprises moving armature, fixed core, coil, spring and moving contact bracing frame, and moving contact is supported on this moving contact bracing frame, so that realize the switch motion of normally closed switch group and normally closed switch group by the motion of this moving contact bracing frame.
During use normally closed switch and normally closed switch are connected on the corresponding SR motor salient pole lead-out wires of coil, realize the series and parallel conversion between the salient pole coil.
As preferably, in described two-layer normally closed switch group, one deck is the first normally closed switch group, another layer is the second normally closed switch group, the input of each normally closed switch in the described normally closed switch group that in the described first normally closed switch group, the output of each normally closed switch connected one to one in proper order, the output of each normally closed switch in the described normally closed switch group that in the described second normally closed switch group, the input of each normally closed switch connected one to one in proper order.
Such floor switch group structure, function is clearly demarcated, easy-to-connect, wherein order connects one to one, i.e. the switch gone up mutually of A and the A corresponding connection of switch of going up mutually, the corresponding connection of switch that the switch that B goes up mutually and B go up mutually, by that analogy.
As preferably, normally closed switch and normally closed switch are the bridge-shaped contact switch.It is simple in structure, and resistance fusion welding is good.
As preferably, normally closed switch and described normally closed switch lock mutually.To increase the electrical security of handoff procedure.Contactor is conventional electromagnetic structure.Normally closed switch and normally closed switch interlocking, i.e. during contactor coil outage, normally closed switch is in closure state, and normally closed switch is in off-state; And contactor coil when energising, normally closed switch is in closure state, and normally closed switch is in off-state.Moving contact is supported on the moving contact bracing frame, realizes the interlocking of normally closed switch group and normally closed switch group by the motion of this moving contact bracing frame.
As preferably, the number of switches of every layer of switches set is 4.For four mutually 16/12 utmost point SR motor winding adopt four and with two and two strings a kind of mode of connection of conversion each other, 4 normally closed switchs and 8 normally closed switch need be arranged altogether, for reducing wiring, exit point with 4 normally closed switch in contactor directly links to each other with the input endpoint of 4 normally closed switchs respectively, and the exit point of 4 normally closed switchs directly links to each other with the input endpoint of other 4 normally closed switch respectively, namely substitutes corresponding 8 binding posts by 8 conductor adapting pieces.
Switch number that can every layer of switches set of this contactor is set to 3(or other quantity should be come to determine as required) individual.Change each other for three-phase 6/4 utmost point SR motor winding employing two and with two strings, or three-phase 12/8 utmost point SR motor winding adopt four and with the conversion each other of two and two strings, 3 normally closed switchs and 6 normally closed switch need be arranged equally altogether, for reducing wiring, requirement directly links to each other the exit point of 3 normally closed switch with the input endpoint of 3 normally closed switchs respectively in contactor, and the exit point of 3 normally closed switchs needs directly to link to each other with the input endpoint of other 3 normally closed switch respectively, namely substitutes corresponding 6 binding posts by 6 conductor adapting pieces.This contactor of every layer of 4 switch also can satisfy this demand.
The beneficial effects of the utility model mainly show: 1, only reach by compact shape structural design and just can finish the control switching that SR motor changing-over winding series and parallel is low to realize, high speed all can efficiently be moved desired winding series and parallel mode between each salient pole with a contactor; 2, reduce connecting line between SR motor and its driving governor to greatest extent, improved its reliability with this.
Description of drawings
Fig. 1 be to four mutually four windings of the every phase of 16/12 utmost point SR motors adopt two parallel connections earlier the circuit theory diagrams of its a kind of mode that is connected changed in two series connection and four parallel connections each other again;
Fig. 2 be to four mutually four windings of the every phase of 16/12 utmost point SR motors adopt two parallel connections earlier the circuit theory diagrams of the mode of priority that is connected changed in two series connection and four parallel connections each other again;
Fig. 3 is the winding diagram that four windings of the four phase every phases of 16/12 utmost point SR motor adopt four parallel connections;
Fig. 4 is that four windings of the every phase of four phase 16/12 utmost point SR motors adopt the winding diagrams of two series connection again of two parallel connections earlier;
Fig. 5 be four mutually four windings of the every phase of 16/12 utmost point SR motors adopt two series connection and the four parallel connections exit winding diagram changing each other to be connected again of two parallel connections earlier.
Among the figure: KM is the mechanism of cut-offfing of contactor, A+, B+, C+, D+, A-, B-, C-, D-, A
1, B
1, C
1, D
1, A
2, B
2, C
2, D
2Be the binding post of sub-winding lead-out wire, K1-K4, K5-K8 are two-layer normally closed switch groups, and S1-S4 is one deck normally closed switch group.
Embodiment
Below by embodiment, and by reference to the accompanying drawings, the technical solution of the utility model is further described in detail.
Embodiment: to shown in Figure 5, the utility model is a kind of contactor for changing-over motor winding series-parallel system as Fig. 1.
Present embodiment with low cruise better performances, torque pulsation less four mutually the SR motor of 16/12 electrode structure be example, two and two polyphones that carry out the salient pole winding with contactor connect with four conversions in parallel and are connected.
For four four windings of the every phases of 16/12 utmost point SR motor mutually, adopt two modes that are connected in series again of two parallel connections earlier, change each other with four modes that are connected in parallel.
The switch of contactor is divided into upper, middle and lower-ranking to be placed, in the present embodiment, upper and lower two-layer be K1-K4 and K5-K8 as the normally closed switch group, the middle level is that S1-S4 is as the normally closed switch group.Normally closed switch K1-K8 and normally closed switch S1-S4 are the bridge-shaped contact switch, normally closed switch and normally closed switch interlocking, be that the make and break often of normally closed switch closure close to disconnect, disconnect often closing in the normally closed switch closure equally and disconnect that energising and outage by the contactor control coil realize.
When switching on according to the every phase winding of SR motor, requirement makes polarity of the magnetic field that its adjacent salient pole produces opposite principle each other, for four mutually four windings of the every phases of 16/12 utmost point SR motor adopt four parallel connections wiring as shown in Figure 3, and four windings of every phase adopt two parallel connections earlier again two series connection wiring as shown in Figure 4, comparison diagram 3 and Fig. 4 can draw as shown in Figure 5 four windings of every phase and adopt the two exit winding diagrams of connecting and changing each other to be connected with four parallel connections again of two parallel connections earlier.By Fig. 5 comparison diagram 3 and Fig. 4 as can be known: when dual mode was changed each other and is connected, every phase winding needed normally closed and two contact switchs of often opening to realize transferring.Be example mutually with A, when motor runs on low speed speed governing section, require A
1With A
2Connect into the mode of connection of the two poles of the earth windings the two poles of the earth in parallel windings in series by a normally-closed contact, when motor runs on high speed speed governing section, require A+ and A
2, A
1Connect into the equal mode of connection in parallel of four utmost point windings by two normally opened contacts respectively with A-.
To four phase SR motors 4 normally closed and 8 normally opened contacts need be arranged altogether by above-mentioned analysis, so can obtain as shown in Figure 1 four mutually 16/12 utmost point SR motor four windings of every phase are adopted two parallel connections earlier the circuit diagram of a kind of mode that is connected are changed in two series connection and four parallel connections each other again; As shown in Figure 2 four mutually 16/12 utmost point SR motor four windings of every phase are adopted two parallel connections earlier the circuit diagram of the mode of priority that is connected are changed in two series connection and four parallel connections each other again.
For reducing each the associated wiring between SR motor and its driving governor as far as possible, require only to realize that with a contactor conversion of described winding series and parallel mode connects, namely need contactor to have the upper, middle and lower-ranking switches set, wherein two-layer is normally closed switch group layer, every layer has four normally closed switch, another layer is normally closed switch group layer, and every layer has four normally closed switchs equally.Wherein the output of 1/2nd normally closed switch directly is connected with the input of corresponding each normally closed switch of normally closed switch group layer by conductor spare, thereby can save four respective terminal; The input of other 1/2nd normally closed switch directly is connected with the output of corresponding each normally closed switch of normally closed switch group layer by conductor spare, thereby also can save four respective terminal.
In the connected mode of Fig. 1, the upper and lower be K1-K4 and K5-K8 as the normally closed switch group, the middle level is that S1-S4 is as the normally closed switch group.Wherein the output of 1/2nd normally closed switch K1, K3, K5, K7 is with the corresponding input that connects S1-S4 according to the order of sequence one by one, and the input of other 1/2nd normally closed switch K2, K4, K6, K8 is with the corresponding output that connects S1-S4 according to the order of sequence one by one; In connected mode shown in Figure 2 (being mode of priority), the upper strata is that K1-K4 is as the first normally closed switch group, the middle level is that S1-S4 is as the normally closed switch group, lower floor is that K5-K8 is as the second normally closed switch group, connect one to one the in proper order output of S1-S4 of connect one to one the in proper order input of S1-S4 of the output of K1-K4, the input of K5-K8.
Claims (5)
1. contactor that is used for changing-over motor winding series-parallel system, comprise that switch contact cut-offs mechanism, it is characterized in that: also comprise, in, following three layers of switches set, the number of switches of every layer of switches set is identical, wherein two-layer switches set is the normally closed switch group, another layer switches set is the normally closed switch group, in described normally closed switch group each normally closed switch output of 1/2nd normally closed switch is connected to the input of each normally closed switch in the described normally closed switch group according to the order of sequence with one-to-one relationship, each normally closed switch input of other 1/2nd normally closed switch is connected to the output of each normally closed switch in the described normally closed switch group according to the order of sequence with one-to-one relationship.
2. according to the described a kind of contactor for changing-over motor winding series-parallel system of claim 1, it is characterized in that: in described two-layer normally closed switch group, one deck is the first normally closed switch group, another layer is the second normally closed switch group, the input of each normally closed switch in the described normally closed switch group that in the described first normally closed switch group, the output of each normally closed switch connected one to one in proper order, the output of each normally closed switch in the described normally closed switch group that in the described second normally closed switch group, the input of each normally closed switch connected one to one in proper order.
3. according to the described a kind of contactor for changing-over motor winding series-parallel system of claim 1, it is characterized in that: described normally closed switch and described normally closed switch are the bridge-shaped contact switch.
4. according to claim 1 or 2 or 3 described a kind of contactors for changing-over motor winding series-parallel system, it is characterized in that: described normally closed switch and described normally closed switch lock mutually.
5. according to the described a kind of contactor for changing-over motor winding series-parallel system of claim 1, it is characterized in that: the number of switches of described every layer of switches set is 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320070679 CN203166829U (en) | 2013-02-07 | 2013-02-07 | Contactor for switching series-parallel connection mode of motor winding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320070679 CN203166829U (en) | 2013-02-07 | 2013-02-07 | Contactor for switching series-parallel connection mode of motor winding |
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| Publication Number | Publication Date |
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| CN203166829U true CN203166829U (en) | 2013-08-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320070679 Expired - Fee Related CN203166829U (en) | 2013-02-07 | 2013-02-07 | Contactor for switching series-parallel connection mode of motor winding |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105871290A (en) * | 2016-05-24 | 2016-08-17 | 江西工埠机械有限责任公司 | Series connection and parallel connection switching device for windings of novel permanent magnet synchronous motor |
-
2013
- 2013-02-07 CN CN 201320070679 patent/CN203166829U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105871290A (en) * | 2016-05-24 | 2016-08-17 | 江西工埠机械有限责任公司 | Series connection and parallel connection switching device for windings of novel permanent magnet synchronous motor |
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Legal Events
| 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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130828 Termination date: 20220207 |