CN2530382Y

CN2530382Y - Dynamo having multiple control modes

Info

Publication number: CN2530382Y
Application number: CN 02226312
Authority: CN
Inventors: 丁振荣
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-03-19
Filing date: 2002-03-19
Publication date: 2003-01-08
Anticipated expiration: 2012-03-19

Abstract

The utility model relates to a dynamo having multiple control modes, comprising rotor, stator and winding of the rotor and the stator. The winding of the stator or the rotor is divided into two or more than two mutually insulating branch winding; the thread of the identical branch winding has the same geometrical size, same windings number and wind direction; to the different windings, the thread can be identical in geometrical size, windings number and wind direction( or the same); every branch winding has respective control device, single power supply and individual run without cooperating with other branch winding. For example, when the every winding of the windings U, V, W of the three phase AC motor are divided into L(more than two) mutually insulating branch winding, the 3*L branch windings have primary tips: UA1, VA1, WA1, UA2, VA2, WA2,-UAL, VAL and WAL and have terminals: UB1, VB1, WB1, UB2, VB2, WB2, UBL, VBL and WBL; thus, L independent parallel branch three-phase winding with respective control device are formed. Therefore, when the dynamo is used, partial branch three-phase windings can be controlled to electrify and run in different period with help of a plurality of controllers and a plurality of power, the rest of branch three-phase winding is power off and not at work; or all the L group three-phase windings are electrified to work, increasing the control mode of the motor, therefore, the economic and the energy saving effect are reached.

Description

Motor with multiple control modes

Technical field the utility model relates to a kind of motor, relates in particular to a kind of by changing the diversified motor of motor windings structure realization Electric Machine Control mode.

The background technology prior motor, no matter watt level, also no matter whether have multiple branch circuit in parallel, last winding all connects into one group of terminal, does as a whole use, three phase alternating current motor for example, the mode of connection of its winding is as shown in Figure 1.This traditional winding connection mode does not consider that motor need use the wherein special circumstances of branch road separately sometimes.

The summary of the invention the purpose of this utility model is to avoid the deficiencies in the prior art part and a kind of motor that can select preferable control mode according to actual instructions for use is provided.

The purpose of this utility model can realize by adopting following technical measures, design a kind of motor with multiple control modes, comprise rotor and stator and winding thereof, it is characterized in that: the branch's winding that the winding of described stator or rotor is divided into two or more mutual insulatings, have identical physical dimension, the identical number of turn and winding direction with a coiling of branch's winding, and between the different branches winding, the physical dimension of its coiling, the number of turn and winding direction are inequality or identical; Each branch's winding respectively has its independently control device, switches on work separately and does not get in touch with other sub-winding; Described motor operate at full capacity state and sub-load operating state;

The state of operating at full capacity: all branches' winding work of all switching on;

The sub-load operating state: have only the winding energising work of part branch, all the other branch's winding outages are not worked.With modal three phase alternating current motor is example, and the three phase winding U, V, the W that embed round recessed in the stator have first end UA, VA, WA and terminal UB, VB, WB; Each phase winding all is divided into branch's winding of L mutual insulating, more than the L value 2 or 2; At this moment three original phase windings have just become 3 * L branch's winding, and have just end UA1, VA1, WA1, UA2, VA2, WA2 ... UAL, VAL, WAL and terminal UB1, VB1, WB1, UB2, VB2, WB2 ... UBL, VBL, WBL; Constitute L branch's three phase windings arranged side by side and can implement independently to control thus, coiling in same group branch three phase windings has identical physical dimension, the identical number of turn and winding direction, and not between on the same group branch's three phase windings, the physical dimension of its coiling, the number of turn and winding direction are generally inequality, can certainly be identical;

Like this, when using motor, just can use various control device, multiple power supply (civil power, variable frequency power supply etc.) control section branch three phase winding energising work, allow all the other branch's three phase windings outages do not work (sub-load operating state) according to the different periods; Or allow whole L group of branches three phase winding energising work (full-load operation state).

Compared with prior art, the motor that the utlity model has multiple control modes has the sub-winding branch road, can produce multiple Electric Machine Control mode, makes to select the preferable control mode of motor to become possibility.

The drawing of appended drawings is described as follows:

Fig. 1 is the wiring schematic diagram of existing three phase alternating current motor winding;

Fig. 2 is the wiring signal of the three phase alternating current motor winding after the enforcement technical solutions of the utility model.

The utility model is described in further detail below in conjunction with drawings and Examples.

The existing three phase alternating current motor of embodiment comprises rotor and stator, and round recessed embeds three phase winding U, V, W in stator, and this three phase winding has just holds UA, VA, WA and terminal UB, VB, WB, as shown in Figure 1.The motor that the utlity model has multiple control modes improves the method for winding of winding, the branch's winding that promptly winding of described stator or rotor is divided into two or more mutual insulatings, have identical physical dimension, the identical number of turn and winding direction with a coiling of branch's winding, and between the different branches winding, the physical dimension of its coiling, the number of turn and winding direction are inequality or identical; Each branch's winding respectively has its independently control device, switches on work separately and does not get in touch with other sub-winding.When whole branches winding was all switched on work, described motor was in the state of operating at full capacity; When having only the winding energising work of part branch, when all the other branch's winding outages were not worked, motor was in the sub-load operating state.

Three phase alternating current motor with Fig. 1 is an example, the branch's winding that each phase winding all is divided into the individual mutual insulating of L (L is more than or equal to 2), therefore 3 * L branch's winding arranged, they have just end UA1, VA1, WA1, UA2, VA2, WA2 ... UAL, VAL, WAL and terminal UB1, VB1, WB1, UB2, VB2, WB2, ... UBL, VBL, WBL, as shown in Figure 2; Constitute L branch's three phase windings arranged side by side and can independently control its enforcement respectively thus, coiling in same group branch three phase windings has identical physical dimension, the identical number of turn and winding direction, and not between on the same group branch's three phase windings, the physical dimension of its coiling, the number of turn and winding direction can be inequality, also can be identical; Because branch's three phase windings of 1 to L group have separately independently control system and working power, therefore can make wherein 1 group or some groups be in and be switched on or switched off, form multiple Electric Machine Control mode thus;

For an example under simple scenario, promptly the L value 2, and two branch's three phase windings are arranged.If represent in two branch's windings coiling sectional area sum with S, the sectional area S1=80%S of one of them branch's three phase windings coiling then, the sectional area S2=20%S of another branch's three phase windings coiling, wherein S=S1+S2; Big branch road three phase windings are controlled by contactor, and ramuscule road three phase windings are by Frequency Converter Control.

Enumerate the application example of some technical solution of the present invention below:

Application examples 1: now, the frequency-conversion voltage-varying speed device of making a 500KW is relatively difficult, but making one, the phase asynchronous electrode of the 500KW of five branch roads is arranged is easy, just on original basis, be divided into five branch roads of insulation relatively, the frequency-conversion voltage-varying speed device of available five common 100KW is controlled the ac three-phase asynchronous motor of this 500KW, just can break through above-mentioned technical limitations.

Application examples 2: above-mentioned example, when motor is in the light hours, the frequency-conversion voltage-varying speed device that part is expensive can be deviate from, then other motor of control, realize system synthesis decline originally, as central air conditioner system, for energy-conservation, main frame, refrigerating water pump, coolant pump all is necessary to install frequency converter, but it is so expensive, can change main frame into five same little Frequency Converter Control, coolant pump, refrigerating water pump is not adorned frequency converter, when air-conditioner host is operated at full capacity, five frequency converter full speed operations of main frame, coolant pump, refrigerating water pump connects civil power work, and when cooling load is light (as being lower than 60%), five frequency converters of main control system need reduce frequency work, at this moment, wherein two frequency converters can be deviate from, then the control refrigerating water pump, coolant pump is realized refrigerating water pump, coolant pump energy-conservation.

Application examples 3: it is very necessary that large-scale turbine central air conditioner main machine is installed frequency converter, energy-saving effect is very good, but large-size variable-frequency device price is very expensive, volume is also very big, and can be divided into sectional area to the main frame winding is two branch roads of 70%, 30%, and big branch road is controlled with contactor, ramuscule road Frequency Converter Control, when coolant water temperature was higher, contactor, frequency converter were all devoted oneself to work, the main frame oepration at full load; When dropping under the set point, water temperature prescribes a time limit, the stator of main control system load is closed gradually, make main unit load be lower than 30%, at this moment, contactor is deviate from, and only stays frequency converter speed Control main frame (for making the frequency converter nonoverload, the frequency converter output frequency is reduced to a certain degree, stator is just opened gradually), the operating efficiency when improving the main frame underload reaches purpose of energy saving.Prescribe a time limit when water temperature rises on the set point, close stator, frequency converter is transferred to power frequency, drop into contactor, open the stator full-load operation.And so forth, realize the energy-saving run that main frame does not cut off the power supply fully with less frequency converter.

Application examples 4: on the basis of application examples 3, can replace star---triangle, from start modes such as lotus root step-downs, realize the soft start of motor.It is two branch roads of 80%, 20% that motor windings can be divided into sectional area, and big branch road is controlled with contactor, ramuscule road variable frequency control, during starting, drop into earlier frequency converter from stall start at full speed, and then input contactor operate as normal.Tell the bad phenomenon of electric motor starting mode motor short supply interruption before can avoiding.

Above-mentioned example, motor will be considered frequency, phase angle unanimity at civil power, frequency converter or when organizing frequency converter more and working simultaneously, can analogize the motor of other types.

Claims

1, a kind of motor with multiple control modes, comprise rotor and stator and winding thereof, it is characterized in that: the branch's winding that the winding of described stator or rotor is divided into two or more mutual insulatings, have identical physical dimension, the identical number of turn and winding direction with a coiling of branch's winding, and between the different branches winding, the physical dimension of its coiling, the number of turn and winding direction are inequality or identical; Each branch's winding respectively has its independently control device, switches on work separately and does not get in touch with other sub-winding; Described motor operate at full capacity state and sub-load operating state;

The sub-load operating state: have only the winding energising work of part branch, all the other branch's winding outages are not worked.

2, round recessed embeds three phase winding U, V, W in the motor with multiple control modes according to claim 1, the stator of this motor, and described three phase windings have just holds UA, VA, WA and terminal UB, VB, WB; It is characterized in that: described each phase winding all is divided into branch's winding of L mutual insulating, more than the L value 2 or 2;

Described 3 * L branch's winding has just end UA1, VA1, WA1, UA2, VA2, WA2 ... UAL, VAL, WAL and terminal UB1, VB1, WB1, UB2, VB2, WB2 ... UBL, VBL, WBL; Constitute L branch's three phase windings arranged side by side and can implement independently to control thus, coiling in same group branch three phase windings has identical physical dimension, the identical number of turn and winding direction, and not between on the same group branch's three phase windings, the physical dimension of its coiling, the number of turn and winding direction are inequality or identical;

3, the motor with multiple control modes according to claim 2, it is characterized in that: described L value is 2, promptly have two group of branches, three phase windings, the sectional area S1=80%S of one of them branch's three phase windings coiling, the sectional area S2=20%S of another branch's three phase windings coiling, wherein S=S1+S2; Big branch road three phase windings are controlled by contactor, and ramuscule road three phase windings are by Frequency Converter Control.