CN101834551A - Dual-purpose energy-saving motor for limiting starting current by changing winding connection method - Google Patents
Dual-purpose energy-saving motor for limiting starting current by changing winding connection method Download PDFInfo
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- CN101834551A CN101834551A CN 201010183558 CN201010183558A CN101834551A CN 101834551 A CN101834551 A CN 101834551A CN 201010183558 CN201010183558 CN 201010183558 CN 201010183558 A CN201010183558 A CN 201010183558A CN 101834551 A CN101834551 A CN 101834551A
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Abstract
The invention provides a dual-purpose energy-saving motor for limiting starting current by changing a winding connection method. A winding adopting double-wire parallel winding (connection) is changed into series connection when starting up so as to limit the starting current in the way of increasing the total impedance of a circuit, therefore, the influence of large current to a power grid can be overcome when the motor starts up, the starting characteristic indexes of the motor can be improved, an energy-saving operation mode can be provided for light load application, and the application modes of a single-phase and three-phase motors are respectively provided, and the specific structure of a special centrifugal switch in the single-phase application is provided.
Description
Technical field:
The present invention relates to a kind of use two-wire and around winding, the in parallel use when normally moving; When starting (or underload energy-saving run), change series connection into, with the double-purpose energy-conserving asynchronous motor of the mode limiting starting current that increases the circuit total impedance.
Background technology:
Threephase asynchronous can directly utilize the rotating magnetic field of three-phase alternating current electric forming, and single-phase motor just have to rely on " splitting phase " effect of electric capacity, uses the auxiliary winding and the main winding arranged in dislocation of series capacitance, constitutes the rotating magnetic field of motor stator.
Though reach the monopole asynchronous motor behind certain rotating speed, can rely on rotator inertia to ignore the effect of the auxiliary winding of series capacitance, only just can reliably turn round with main winding, but the auxiliary winding that reduces behind the series capacitance capacity can be kept stable rotation power better, have both simultaneously and start and the monophase machine of the two groups of electric capacity that turn round, the characteristic of monophase machine of one is better than only having.What Fig. 1 provided is modern general, starts and the two single-phase motor circuit theory diagrams that dispose of running electric capacity.
No matter three-phase or monopole asynchronous motor, all be by the required Winding Design of carrying out of normal operation, inevitable reality, be the several times that electric current when starting initial (or stall) surpasses normal operating current, running current reduces along with the raising of rotating speed, just reduces to normal numerical value after only reaching rated rotational frequency.In the practical application of motor device,, reactance causes the influence of super-high-current because of reducing significantly for overcoming the electric motor starting process to electrical network, usually take the start-up course adjunct circuit or change the mode of connection (startup of star angle), suppress excessive electric current, promptly so-called reduced-voltage starting in the mode that reduces voltage.
Patent of invention " from the asynchronous motor of tape starting step-down winding " has been introduced a kind ofly at the main winding position, and the way of the auxiliary winding of additional in-phase coiling needs to increase extra winding, and relatively harsh to the designing requirement of grooved.
Summary of the invention:
Purpose of the present invention is the winding construction that makes full use of motor self, reduces the influence that the big electric current of start-up course causes electrical network, improves the starting characteristic index of monophase machine; And use the energy-saving run mode that provides for light load.
Concrete technical measures are to use the winding (monophase machine is only for main winding) of two-wire shunt-wound motor, whole (Fig. 2,3) of one of parallel wound coil or part (Fig. 4,6) winding and another coil series operation when electric motor starting; Change the mode of connection after reaching desired speed, enter the full normal operating condition in parallel of two groups of coils; At the slight relatively applied environment of motor load, can change the switch or the mode of connection, allow motor windings not enter state in parallel and keep series operation (power save mode).
[please note: so-called " two-wire and around ", be not two strands of coils of simple finger with the parallel coiling of diameter enamelled wire, two paths of meaning but circuit circulates respectively, in fact all windings of every path can use the enamelled wire of the satisfactory any number of share of stock of total sectional area.】
Three phase electric machine circuit shown in Figure 2, come into plain view three-phase and around six windings, the unit switch of three-phase needs the combination of six groups of normal opened contacts and three groups of normally closed contacts altogether, can use two to three A.C. contactor synchronous workings, or makes special unit switch.
At the light load operational environment,, just can not enter the parallel operation state as long as unit switch is failure to actuate.Because motor is original to be the electromagnetic parameter of long-term work comprehensive Design under full-load conditions, and light load when work umber of turn is the twice of design standard, following (rough theoretical value is for after reducing by half because of sectional area so though electric current is reduced to half of design standard, electric current 1/2), essence operating efficiency even surpass half of design power is in the state of energy conservation.
This theory seems utterly unjustifiable, and reality theory or practice all suffice to show that its authenticity.The electromagnetic parameter of tracing it to its cause and choosing when being design of electrical motor, be based on saving most electricity (winding) magnetic (punching) material, substantially belonging to the exchange that motor benefit and manufacturing cost accept or reject (is difficult to the imagination and has that artificially to satisfy the 5KW motor fully energy-conservation, and, give no thought to for example way of 10KW motor data parameter of efficient to even indivedual electromagnetic component is chosen and can be used for even " humble and shabby ").
Monophase machine circuit shown in Figure 3, use two-wire and around the main winding of motor, two windings in series operation when electric motor starting reaches special duplex centrifugal switch action behind the desired speed, when cutting off startup electric capacity, change the mode of connection, enter the full normal operating condition in parallel of two groups of coils.The work of monophase machine light load keeps the method for series connection, illustrates in an embodiment after a while.
The advantage of the single-phase utilization of the present invention is obvious, and for three phase electric machine, shortcoming of the present invention is to increase the quantity of outlet, motor cost slightly improves, but in the application that needs limiting starting current really, and add reduced-voltage starting electrical equipment relatively, reduced overall cost widely; Compare with the wye-delta conversion, under the situation of same starting current, possess bigger detent torque because of the increase of the number of turn is obvious.
Description of drawings:
Fig. 1 is the single-phase motor circuit theory diagrams of the two capacitance arrangement of common startup/running.
Fig. 2 is the two-wire winding three-phase Principle of Electric Engine schematic diagram of unit switch conversion series and parallel wiring.
Fig. 3 is to use the two-wire main winding monophase machine schematic diagram of special centrifugal switch conversion series and parallel wiring.
Fig. 4 is to use special centrifugal switch conversion portion coil series connection, or the two-wire main winding monophase machine schematic diagram of complete and tie.
Fig. 5 is the supporting Converting terminal combination of Fig. 4 circuit, makes things convenient for changing of transformation to be used for the connection status of common mode or energy-saving run mode.
Fig. 6 is the two-wire main winding monophase machine schematic diagram that common centrifugal switch drives the wiring of relay conversion series and parallel.
Fig. 7 is that L series monophase machine starts the structural representation with centrifugal switch.
Fig. 8 is the structural representation according to the special centrifugal switch of Fig. 7 prototype transformation.
Fig. 9 is the series connection of unit switch conversion portion coil, or the two-wire winding three-phase Principle of Electric Engine schematic diagram of complete and tie.
The unified numbering of each map logo is as follows:
LZ is a main winding; LF is an auxiliary winding; QC is for starting electric capacity; YC is running electric capacity; K is a centrifugal switch; A, B, C are that three phase mains, O are center line; LA1, LA2, LB1, LB2, LC1, LC2 be respectively two-wire and around three phase windings; ZKA, ZKB, ZKC are respectively the unit switch of corresponding three-phase; LZ1, LZ2 be two-wire and around two main windings; LZ3, LZ4 are two-wire and the part that does not change connection in main winding; XD is the Converting terminal combination; TK is the centrifugal switch of special two changeover contacts; J is a switching relay, and R is a current-limiting resistance.
The centrifugal switch numerical reference: 1 is the normally opened contact frame; 2 is insulating base; 3 are moving disconnected contact bracket; 4 is rivet; 5 is reed; 6 contact points for the sedimentator promotion; 7 is installing hole; 8 for connecting the insulation board of reed.
Embodiment: further introduce embodiments of the present invention below in conjunction with accompanying drawing.
Embodiment one: centrifugal switch changing of transformation coil sections series and parallel state, two-wire and around the monophase machine of main winding
Be subjected to the compressing of sedimentator to be in closure state when special duplex centrifugal switch TK is flat in Fig. 4 circuit, one road normally opened contact is communicated with power supply and starts electric capacity QC, another road is the coil sections LZ1 of one of winding in parallel, connect with another winding L Z2-LZ4 combinational circuit and to constitute the path of power supply current-limited startup (or underload energy-saving run), after general load normal mode reaches desired speed, TK action deenergization is connected reconfiguration to the LZ2-LZ4 series circuit with QC's, simultaneously LZ1 changes another path of formation of connect with former unsettled LZ3, and the two-way parallel connection enters the normal running status of monophase machine.
Because line transfer is all carried out at motor internal, need the Converting terminal combination on one group of outer lead road of individual processing, be used for the energy-saving run mode.Converting terminal that Fig. 5 describes combination XD is simplified illustration, and the partial circuit of having used Fig. 4 shows the connection status under the normal operation; Depict the connection status that the Converting terminal combination is used for the energy-saving run mode among the figure in the frame of broken lines.
The special duplex centrifugal switch of Fig. 8 signal uses common monophase machine shown in Figure 7 to start with simple transformation of (for example L series) centrifugal switch and forms.Method is to block to re-use insulation board behind the reed and link and be one, cuts off the both sides that are electrically connected reed normally opened contact and moving disconnecting point are set respectively.
Embodiment two: common centrifugal switch drives relay conversion series and parallel wiring, two-wire and around the monophase machine of main winding
Under the situation that load is heavier relatively when more high-power monophase machine starts, use the centrifugal switch conversion line of duplex contact merely, will can not finish because of the inertia deficiency causes conversion.Fig. 6 is to use common centrifugal switch, drives the relay conversion when start finishing to enter operation, change coil the series and parallel operating state two-wire and around the monophase machine of main winding.The relay coil of circuit design conversion and control uses to be lower than supply voltage and to add the effect of current-limiting resistance of going here and there, and is the accelerating relay start-up course.Can use full-wave rectification bridge to drive direct current relay work (the diagram circuit does not comprise rectifier bridge).
This example is used for the way of energy-saving run mode and explains that with preamble Fig. 2 " light load operational environment " is the same, as long as relay J is failure to actuate " just can not enter the parallel operation state ".
Embodiment three: the two-wire winding three-phase motor of unit switch conversion series and parallel wiring
Fig. 9 is the series connection of unit switch conversion portion coil, or the two-wire winding three-phase Principle of Electric Engine schematic diagram of complete and tie.Be connected to the centre tap of another winding with the difference of Fig. 2 one of the winding that is to connect, tap position can design arbitrarily according to the needs of different energy-saving run peak loads, does not do concrete qualification.
Claims (5)
1. dual-purpose energy-saving motor that changes the winding connection method limiting starting current, limiting starting current or underload energy-saving run mode are characterised in that: the winding that uses the two-wire shunt-wound motor, all (or coil sections) series operations of winding during electric motor starting, change the parallel running state into after reaching desired speed, or allow to keep the series operation state.
2. according to the dual-purpose energy-saving motor of the described change winding connection method of claim 1 limiting starting current, the unit switch conversion that is applied to the three phase electric machine use is characterised in that: six groups of normal opened contacts and three groups of normally closed contact synchronization actions.
3. according to the dual-purpose energy-saving motor of the described change winding connection method of claim 1 limiting starting current, the special centrifugal switch of monophase machine start-up control is characterised in that: drive two groups of changeover contacts simultaneously.
4. according to the dual-purpose energy-saving motor of the described change winding connection method of claim 1 limiting starting current, special duplex centrifugal switch is characterised in that: block the electrical connection on common centrifugal switch reed both sides, both sides are provided with normally opened contact and moving disconnecting point respectively.
5. according to the dual-purpose energy-saving motor of the described change winding connection method of claim 1 limiting starting current, solving monophase machine startup inertia deficiency method is characterised in that: use common centrifugal switch to drive the wiring of relay conversion series and parallel, relay uses and is lower than supply voltage adjunction string current-limiting resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010183558 CN101834551A (en) | 2010-05-27 | 2010-05-27 | Dual-purpose energy-saving motor for limiting starting current by changing winding connection method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201010183558 CN101834551A (en) | 2010-05-27 | 2010-05-27 | Dual-purpose energy-saving motor for limiting starting current by changing winding connection method |
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| CN101834551A true CN101834551A (en) | 2010-09-15 |
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| CN 201010183558 Pending CN101834551A (en) | 2010-05-27 | 2010-05-27 | Dual-purpose energy-saving motor for limiting starting current by changing winding connection method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104393792A (en) * | 2014-11-17 | 2015-03-04 | 陕西航空电气有限责任公司 | Low-voltage starting/power generation machine winding and transformation method |
| CN105186814A (en) * | 2015-09-03 | 2015-12-23 | 徐东旭 | Dual-power energy-efficient asynchronous motor |
| CN106684846A (en) * | 2016-07-18 | 2017-05-17 | 丛伟滋 | Protective circuit used in starting and operating processes of single-phase asynchronous motor |
| CN106961195A (en) * | 2017-05-03 | 2017-07-18 | 珠海格力节能环保制冷技术研究中心有限公司 | Single-phase asynchronous motor winding connection in series-parallel changing method, single-phase asynchronous motor and equipment |
| CN107086841A (en) * | 2017-06-02 | 2017-08-22 | 陈秀清 | A kind of series parallel control circuit |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2098730U (en) * | 1991-04-19 | 1992-03-11 | 时广平 | Double-contact centrifugal switch and protector for motor |
| CN2147682Y (en) * | 1993-02-22 | 1993-11-24 | 文登市金龙电机厂 | Three-phase power-changing asynchronous motor |
| CN2212283Y (en) * | 1994-11-05 | 1995-11-08 | 黄忠益 | Automatic/manual multifunctional protection pressure-reducing starter |
| CN2324686Y (en) * | 1998-05-22 | 1999-06-16 | 王国祥 | Single-phase motor protector |
| CN2724292Y (en) * | 2004-08-30 | 2005-09-07 | 崔长利 | Low start current three phase asynchronous motor |
| WO2009030542A2 (en) * | 2007-08-29 | 2009-03-12 | Robert Bosch Gmbh | Electrical machine |
| CN201270486Y (en) * | 2008-10-10 | 2009-07-08 | 林仕供 | Control circuit for enhance starting torque of single phase motor |
-
2010
- 2010-05-27 CN CN 201010183558 patent/CN101834551A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2098730U (en) * | 1991-04-19 | 1992-03-11 | 时广平 | Double-contact centrifugal switch and protector for motor |
| CN2147682Y (en) * | 1993-02-22 | 1993-11-24 | 文登市金龙电机厂 | Three-phase power-changing asynchronous motor |
| CN2212283Y (en) * | 1994-11-05 | 1995-11-08 | 黄忠益 | Automatic/manual multifunctional protection pressure-reducing starter |
| CN2324686Y (en) * | 1998-05-22 | 1999-06-16 | 王国祥 | Single-phase motor protector |
| CN2724292Y (en) * | 2004-08-30 | 2005-09-07 | 崔长利 | Low start current three phase asynchronous motor |
| WO2009030542A2 (en) * | 2007-08-29 | 2009-03-12 | Robert Bosch Gmbh | Electrical machine |
| CN201270486Y (en) * | 2008-10-10 | 2009-07-08 | 林仕供 | Control circuit for enhance starting torque of single phase motor |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104393792A (en) * | 2014-11-17 | 2015-03-04 | 陕西航空电气有限责任公司 | Low-voltage starting/power generation machine winding and transformation method |
| CN105186814A (en) * | 2015-09-03 | 2015-12-23 | 徐东旭 | Dual-power energy-efficient asynchronous motor |
| CN106684846A (en) * | 2016-07-18 | 2017-05-17 | 丛伟滋 | Protective circuit used in starting and operating processes of single-phase asynchronous motor |
| CN106961195A (en) * | 2017-05-03 | 2017-07-18 | 珠海格力节能环保制冷技术研究中心有限公司 | Single-phase asynchronous motor winding connection in series-parallel changing method, single-phase asynchronous motor and equipment |
| CN107086841A (en) * | 2017-06-02 | 2017-08-22 | 陈秀清 | A kind of series parallel control circuit |
| CN107086841B (en) * | 2017-06-02 | 2019-08-16 | 陈秀清 | A kind of series parallel control circuit |
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Application publication date: 20100915 |