CN103216452B - Draining pump - Google Patents
Draining pump Download PDFInfo
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- CN103216452B CN103216452B CN201310149559.6A CN201310149559A CN103216452B CN 103216452 B CN103216452 B CN 103216452B CN 201310149559 A CN201310149559 A CN 201310149559A CN 103216452 B CN103216452 B CN 103216452B
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Abstract
The invention discloses a kind of draining pump, it is characterized in that, described draining pump comprises impeller and the brushless motor for drives impeller, this impeller comprises wheel disc and multiple blade being arranged on wheel disc, described blade extends away from sheave surface from sheave surface along impeller axis direction, and have the first end of adjacent impeller axis with away from impeller axis and second end relative with first end; Its Leaf has the cross sectional shape of smooth curved in the plane perpendicular to impeller axis, described cross sectional shape at least comprises the first curved section of contiguous first end and the second curved section of contiguous the second end, the first curved section has first curvature radius, and the second curved section has the second curvature radius that is different from first curvature radius. Draining pump provided by the present invention is simple in structure, and the life-span is longer, and is applicable to batch production.
Description
Technical field
The present invention relates to draining pump technical field, more specifically, the present invention relates to a kind of draining pump and leaf thereofWheel.
Background technology
At present, the household electrical appliance such as dish-washing machine, washing machine recirculated water or draining draining pump motor used is logicalNormal is induction conductivity or single-phase permanent-magnet synchronous motor. Induction conductivity is because efficiency is lower, structure is multipleAssorted, volume is large, cost is higher, progressively exiting the drainage pump of household electric appliance such as dish-washing machine, washing machine shouldUse field. Single-phase permanent-magnet synchronous motor itself cannot be realized directional-rotation, need on rotor structure, increaseNon-return mechanism prevents motor reverse rotation, and the electric machine structure of single-phase permanent-magnet synchronous motor is more complicated,Start noise larger.
On the other hand, the existing draining pump of the household electrical appliance such as washing machine, dish-washing machine impeller used is generally by pacifyingThe some blades that are contained on axle sleeve form, and blade is prismatic blade, in drainage procedure, make water centrifugal force,Tangential shearing action is issued to draining object, and its shortcoming is that draining pump discharge is little, and in-fighting is large, and currentAxially also there is Partial Shear power, can push end cap and motor shaft, cause end cap distortion, rotor assembly skewAnd cisco unity malfunction forms noise. Meanwhile, because there being certain gap between impeller and pump seat, at axleJust produced eddy current to water under the effect of shearing force, and picture washing machine, dish-washing machine class household electrical appliance are requiredIn the sewage of discharging, can contain the foreign material such as fiber, cotton yarn more or less, these foreign material are followed the whirlpool of waterRevolve, arrive bearing place, be wrapped on the axle of water pump, after long-play, the foreign material of winding increase gradually,Make pump shaft produce resistance, normally draining, can make water pump stall when serious, burn out.
Along with the proposition of green home appliance theory and the enhancing of environmental consciousness, existing draining pump cannot meetThe requirement that everybody is more and more higher to living environment comfort level. Therefore, need a kind of novel draining pump, itsSimple in structure, small volume, efficiency is higher, and operating noise is less.
Summary of the invention
In order to solve the problems of the technologies described above, according to a first aspect of the invention, provide a kind of draining pump to useBrushless motor, comprising: motor casing; Motor shaft; Rotor assembly, be arranged on described motor shaft and withThe rotation of described motor shaft and synchronous rotary comprises rotor core and embeds on described rotor coreRotor magnetic pole; Stator module, comprise stator core and be wound on threephase stator in stator core slot aroundGroup; And control panel, comprise three-phase inverting circuit, and comprise circuit control assembly, this circuit controlParts adopt three-phase inverting circuit described in space vector pulse width modulation control on described stator moduleThe three-phase voltage of threephase stator winding output, wherein, described control panel is accommodated in described motor casing.
Thus, this brushless motor can be realized directional-rotation, and without adopting non-return mechanism. Preferably,Control panel also comprises circuit control assembly, and this circuit control assembly adopts space vector pulse width modulation controlMake the three-phase voltage that described three-phase inverting circuit is exported to the stator winding on described stator module.
Preferably, stator module adopts fractional-slot structure. Preferably, the single rotor magnetic in rotor assemblyThe utmost point shared electric angle scope within the scope of corresponding pole span is 90 °-120 °. Preferably, control panel alsoComprise detection part and analog-to-digital conversion parts, described detection part for detection of described three-phase inverting circuit toThe three-phase voltage of the threephase stator winding output on described stator module and three-phase current and output three-phase electricityPress detection signal and three-phase current detection signal; Described analog-to-digital conversion parts detect described detection partTo three-phase voltage detection signal and three-phase current converting sensed signals be digital voltage signal and digital currentSignal, and the digital voltage signal being converted to and digital current signal are offered to described circuit control partPart. Preferably, circuit control assembly utilize the digital voltage signal that receives from described analog-to-digital conversion parts andDigital current signal, adopts sliding-mode control to estimate the position of the rotor magnetic pole of described rotor assembly. ExcellentSelection of land, circuit control assembly utilizes position and the described digital voltage signal of estimated rotor magnetic poleWith digital current signal, adopt space vector pulse width modulation to produce and be used for controlling described three-phase inversion electricityThe pulse signal of the device for power switching in road. Preferably, control panel also comprises differential amplification parts, instituteState differential amplification parts and receive described three-phase voltage detection signal and three-phase current detection from described detection partSignal, amplifies described three-phase voltage detection signal and three-phase current detection signal, and by the three-phase after amplifyingVoltage detection signal and three-phase current detection signal output to described analog-to-digital conversion parts. Preferably, circuitControl assembly is one or more microprocessors or digital signal processor. Preferably, control panel also comprisesThree-phase output end and earth terminal, described three-phase output end is exported with the three-phase of described three-phase inverting circuit respectivelyEnd connects and is connected respectively described earth terminal and described three-phase inverting circuit with described threephase stator windingCentral point connect and be connected with the central point of described threephase stator winding. Preferably, in described controlOn plate, described three-phase inverting circuit and described detection part are arranged together, and described circuit control assembly,Described differential amplification parts and described analog-to-digital conversion parts and described three-phase inverting circuit and described detection partArranged apart. Preferably, control panel coordinates by machinery mode and described stator module are fixed together.Preferably, brushless motor is for the draining pump of dish-washing machine or washing machine. Preferably, motor casing is not completeTotally-enclosed, a part for stator module is exposed.
In addition, according to a second aspect of the invention, provide a kind of draining pump, comprised as aforementioned aspect instituteThe brushless motor of stating and the water pump part being driven by brushless motor. Described water pump part comprises water pump shellAnd impeller, the side that described motor casing stretches out at motor shaft has for fixing of fixing with described water pump shellStructure, and described impeller is fixedly attached to described motor shaft so that under the driving of described brushless motorRotate together with described motor shaft.
Compared with prior art, adopt and can realize directional-rotation according to brushless motor of the present invention, andWithout adopting non-return mechanism, also make thus draining pump of the present invention more efficient and compact.
According to a third aspect of the invention we, provide a kind of draining pump, described draining pump comprises impeller and useIn the brushless motor of drives impeller, this impeller comprises wheel disc and multiple blade being arranged on wheel disc, instituteState blade and extend away from sheave surface from sheave surface along impeller axis direction, and there is adjacent impeller axisFirst end with away from impeller axis and second end relative with first end; Its Leaf is perpendicular to impellerIn the plane of axis, have the cross sectional shape of smooth curved, described cross sectional shape at least comprises contiguous first endThe first curved section and the second curved section of contiguous the second end, the first curved section has first curvatureRadius, and the second curved section has the second curvature radius that is different from first curvature radius.
Preferably, first curvature radius is greater than second curvature radius. What preferably, first end was blade entersThe port of export that mouth end and the second end are blade. Preferably, the song of the first curved section and the second curved sectionRate center is in the same side of blade. Preferably, blade also comprises and is positioned at the first curved section and the second arcThe 3rd section of the linearity between section or arc. Preferably, the 3rd section is for having the 3rd curvature halfThe 3rd curved section in footpath, the 3rd radius of curvature is greater than the first and second radius of curvature. Preferably, shouldThe 3rd section is the 3rd curved section with the 3rd radius of curvature, and the 3rd radius of curvature is first andBetween two radius of curvature. Preferably, the first curved section the tangent line at first end place with in the footpath of this positionThe inlet angle α that is blade to the angle of direction, the inlet angle α of described blade is 0-25 °; And the second arcThe angle of outlet β that shape section is blade at the tangent line at the second end place and the angle of the radial direction in this position,The angle of outlet β of described blade is 70-90 °. Preferably, wheel disk center has impeller bore, for electronicArbor connects, and in the annular section between impeller bore and the first end of blade, is provided with at least one relief hole.Preferably, described wheel disc and blade are integrally formed as single-piece. Preferably, described draining pump also comprises asDescribed brushless motor on the one hand.
According to a forth aspect of the invention, also provide a kind of impeller for drainage pump, comprised as the aforementioned the 3rdThe blade wheel structure that aspect limits.
By adopting arc shaped blade, make blade adopt the most rationally curved pattern, and inlet blade angle and leafThe sheet angle of outlet, reduces flow losses, has improved operating efficiency. Design by wheel disc, prevented current pairThe impact of end cap and the damage causing thus, meanwhile, the axial force producing due to current is less, has avoidedThe impact of current to motor shaft and rotor, prevents from causing thus rotor off-axis, produces noise, protectsDemonstrate,prove it in axially normal work, extended its working life. The design of the wheel disc also foreign material in anti-sealing is followedWith the vortex of water, arrive bearing place, be wrapped on the axle of water pump, after long-play, make pump shaft produceResistance, normally draining, makes water pump stall when serious, burns out. The design of relief hole, has ensured wheelCoil two side hydraulic pressures identical, avoid the excessive damage that wheel disc is caused of a side water impact. Provided by the present inventionDrain pump impeller and draining pump simple in structure, the life-span is longer, and be applicable to batch production.
According to a fifth aspect of the invention, the motor that provides a kind of draining pump to use, this motor comprisesShell, motor shaft, rotor assembly and stator module, motor shaft is connected in an end of motorThe impeller of draining pump, for drives impeller, is wherein provided with on the sidewall of this shell and holds binding postTerminal mouth and terminal protection structure, terminal protection structure comprises the baffle that terminal mouth top is set, this guarantorBackplate stretches out from the outside cantilever of outer surface of outer cover, and has a down dip and tiltedly extend towards a side direction of terminal mouth.
Preferably, in the direction of insertion in terminal insertion end rim of the mouth, this baffle extends along direction of insertion.Preferably, this baffle along electrical axis direction another relative with a described end towards shellEnd dips down and tiltedly extends. Preferably, angle of inclination is less than 30 °. Preferably, terminal protection structureAlso comprise from baffle lowest edge or near the batten plate to downward-extension, baffle and batten plate are formedAt least in part around the L shaped structure of inversion of terminal mouth. Preferably, terminal protection structure also comprises from protectingThe wall portion that backplate outermost edges protrudes upward. Preferably, terminal protection structure also comprises from baffleThe wall portion that high rim and outermost edges protrude upward, makes baffle, wall portion and shell shape in a rowTank. Preferably, motor is brushless motor. Preferably, baffle is across the whole width of terminal mouthExtend, or extend beyond the both sides of terminal mouth.
Also provide according to a sixth aspect of the invention one to comprise aforementioned electric motivation and by electric motor drivenThe draining pump of impeller.
Thus, in the time that motor top has water droplet to fall, owing to there being the existence of terminal protection structure, water can be alongIts inclined-plane slides into side drippage, thereby has effectively protected binding post, has ensured that itself and external power source connectThe reliability connecing and security. Electric machine structure simplicity of design provided by the present invention is easily gone, and production cost is low,Be suitable for industrial production.
A first aspect of the present invention is applicable to the of the present invention second to the 6th aspect comparably, and vice versa.
Other features and advantages of the present invention will be set forth in the following description, and, partly fromIn bright book, become apparent, or understand by implementing the present invention. Object of the present invention is excellent with otherPoint can be realized and be obtained by specifically noted structure in description, claims and accompanying drawing.
Brief description of the drawings
Accompanying drawing is used to provide a further understanding of the present invention, and forms a part for description, with thisInventive embodiment one is used from explanation the present invention, is not construed as limiting the invention. In the accompanying drawings:
Fig. 1 illustrates the draining pump external structure schematic diagram according to the embodiment of the present invention;
Fig. 2 illustrates the draining pump STRUCTURE DECOMPOSITION schematic diagram according to the embodiment of the present invention;
Fig. 3 illustrates according to the cutaway view of the draining pump of embodiment of the present invention brushless motor;
Fig. 4 illustrates according to the fractional-slot structure of the draining pump of embodiment of the present invention brushless motor;
Fig. 5 illustrates according to the distributed polar rotor magnetic pole of the draining pump of embodiment of the present invention brushless motorThe schematic diagram of structure;
Fig. 6 illustrates according to the salient pole type rotor magnetic pole of the draining pump of embodiment of the present invention brushless motorThe schematic diagram of structure;
Fig. 7 illustrates according to the three phase sine winding of the draining pump of embodiment of the present invention brushless motor and dividesButut;
Fig. 8 illustrates the employing space vector pulse width modulation control draining pump according to the embodiment of the present inventionWith the inverter circuit figure of brushless motor;
Fig. 9 illustrates according to the control block diagram of the draining pump of embodiment of the present invention brushless motor;
Figure 10 illustrates according to the air-gap field waveform of the draining pump of embodiment of the present invention brushless motorSchematic diagram;
Figure 11 illustrates according to the electricity of the stator winding of the draining pump of embodiment of the present invention brushless motorThe schematic diagram of stream waveform;
Figure 12 illustrates according to the three-dimensional view of the impeller for drainage pump of the embodiment of the present invention;
Figure 13 illustrates according to the front view of the impeller for drainage pump of the embodiment of the present invention;
Figure 14 illustrates the amplification partial elevation view according to the impeller for drainage pump of the embodiment of the present invention; And
Figure 15 illustrates according to the three-dimensional view of the terminal protection structure of the embodiment of the present invention.
Detailed description of the invention
Describe in detail with reference to the accompanying drawings according to each embodiment of the present invention. Here it should be noted that,In the accompanying drawings, identical Reference numeral is given and substantially there is composition identical or similar structures and functionPart, and will omit being repeated in this description about them. Should be understood that term " on ", D score, " upwards "," downwards " directional terms is the description for the orientation shown in accompanying drawing, and these orientation are not limitProperty processed. If not otherwise specified, term " inwardly " herein, " outwards ", " interior ", " outward "," inner side ", " outside " refer to the scope with respect to parts center, for example, using electrical axis as reference,Interior and inner side refers to position or orientation more close or sensing electrical axis, and outer and outside refers to further from motor shaftThe orientation of line or orientation, and for the each position on electrical axis, outside or outside refers to further from motorCentre. In addition, the term such as term " level ", " vertically ", " dangling " does not represent to require partsAbswolute level or dangle, but can tilt a little. As " level " only refers to that its direction is relatively " perpendicularDirectly " level more, is not to represent this structure level completely, but can tilts a little.
As depicted in figs. 1 and 2, show the draining pump external structure schematic diagram according to the embodiment of the present inventionAnd draining pump STRUCTURE DECOMPOSITION schematic diagram.
As shown in Figure 1, can comprise water pump part 1 and motor according to the draining pump of the embodiment of the present inventionPart 2.
As shown in Figure 2, described water pump part 1 can comprise water pump shell 11 and impeller 13. In addition institute,State water pump part 1 and can also comprise sealing ring 12, sealing ring 12 is arranged on water pump part 1 and motorBetween part 2, for guaranteeing the watertightness of the connecting portion between described water pump part and motor portion.
Water pump shell 11 is for defining the general cylindrical parts of pump chamber, and its first end opens wide, for connectingTo motor portion, and be provided with water inlet on relative the second end. On the sidewall of water pump shell 11, establishBe equipped with delivery port, and described delivery port is connected with described pump chamber.
Impeller 13 is arranged in the pump chamber of water pump shell 11. The motor shaft 221 of motor portion 2 extend intoIn pump chamber, and impeller is fixedly attached to motor shaft 221 so that can be under Motor Drive and motorAxle 221 rotates together.
As shown in Figure 2, motor portion 2 comprises brushless motor 22. Brushless motor 22 comprises electricityArbor 221, rotor assembly 222, stator module 223 and control panel 224. Brushless motor 22 wrapsDraw together motor casing, motor casing comprises main casing 21 and insulating boot 23.
Control panel 224 is contained in motor casing, and particularly, control panel 224 is contained in the present embodimentIn insulating boot 23. Preferably, described control panel 224 is by any suitable mechanical fit system and brushlessThe stator module 223 of motor 22 is fixed together. Control panel 224 also can be fixed to as motor casing thisOn other stationary parts of sample. The stator module of promising described brushless motor 22 is set on control panel 224The circuit of the threephase stator winding power supply on 223. In addition, consider the draining according to the embodiment of the present inventionThe working environment of pump preferably, also applies the insulated paint for circuit insulation protection on described control panelOr insulating cement.
In addition, the main casing 21 of motor portion 2 for example, by machanical fastener (threaded fastener or cardBuckle structure etc.) connect together with insulating boot 23, to described brushless motor 22 is closed.Between main casing 21 and insulating boot 23, be preferably provided with another sealing ring, to keep connection between the twoThe sealing of portion. Alternatively, motor casing can not be also completely enclosed, and only partly seals motorParts. As shown in the preferred embodiment of Fig. 3, between the main casing 21 of motor casing and insulating boot 23, depositIn certain gap, thereby the stator module of motor 223 partly exposes, and has realized thus loose betterThermal effect.
As shown in Figure 2, on described control panel 224, power supply terminal 2241 is also set, power supply terminal is with outerPortion's power supply (not shown) connects, to power to described control panel 224 and brushless motor 22.
In connection with Fig. 3-Fig. 7, the draining pump brushless electric according to the embodiment of the present invention is described below,The structure of machine.
As previously mentioned, the household electrical appliance such as dish-washing machine, washing machine recirculated water or draining draining pump used is electronicMachine is generally induction conductivity or single-phase permanent-magnet synchronous motor, but due to induction conductivity or forever single-phaseThe characteristic of magnetic-synchro motor can not meet augmented performance demand day by day. Consider the spy of brushless motorProperty, therefore, propose in the present invention brushless motor to be applied to the household electrical appliance such as dish-washing machine, washing machine.At present, in the draining pump of the household electrical appliance such as dish-washing machine, washing machine, not yet adopted brushless motor,The application that does not particularly also adopt three-phase inverting circuit to drive with brushless motor draining pump. LogicalCross employing inverter circuit and control to brushless motor and apply sense of current, can realize brushless motorDirectional-rotation, therefore do not need to increase in the case non-return mechanism yet.
As shown in Figure 3, show according to the cutaway view of the draining pump of embodiment of the present invention brushless motor.In Fig. 3, for same parts, adopt and reference number identical in Fig. 2.
As previously mentioned, described brushless motor 22 can comprise described motor shaft 221, rotor assembly 222,Stator module 223 and control panel 224.
Described rotor assembly 222 comprises rotor core and embeds the rotor magnetic on described rotor coreThe utmost point, described rotor magnet is preferably permanent magnet, described stator module 223 comprise stator core and aroundThreephase stator winding in stator core slot.
Described brushless motor 22 is preferably fractional-slot motor, and described threephase stator winding is preferably 3Positive chorded winding mutually, described rotor assembly can adopt hidden pole type field structure or salient pole type field structure.
As shown in Figure 4, show according to the fractional-slot of the draining pump of embodiment of the present invention brushless motorStructure. In Fig. 4, for same parts, adopt and reference number identical in Fig. 2. Wherein,Reference number 223 represents stator module, and reference number 2221 represents the rotor core in rotor assembly, ginsengExamine label 2222 and represent the permanent magnet in rotor assembly.
Every grade of every phase groove number that integer groove structure specifically refers in the stator module of brushless motor equals 1Stator slot structure, and that fractional-slot structure specifically refers in the stator module of brushless motor every grade is everyThe stator slot structure that phase groove number is less than 1. For integer groove structure, fractional-slot structure can reduceGroove number, this is convenient to the making of stator core, and can reduce the torque fluctuation that slot effect causes.
But, no matter be integer groove structure or fractional-slot structure, all must there is symmetrical stator winding,Between three phase windings, phase difference is 120 °, to obtain symmetrical electromotive force and magnetomotive force. With magnetic pole logarithmP is 3, and the brushless motor that number of phases m is 3 is example, in the time adopting integer groove structure, right in order to obtainThe armature winding claiming, required groove is counted Z=2 × p × m=18; In the time adopting fractional-slot structure, in order to obtainSymmetrical armature winding, simultaneously following three conditions:
(1) groove is counted the integral multiple that Z is number of phases m;
(2) groove is counted Z and magnetic pole logarithm p has the common divisor t that is not equal to 1, and Z/t=Z0, Z0/mFor integer;
(3) every extremely every phase groove is counted q=Z/2pm and is less than 1 mark.
Preferably, q gets 0.5, and when magnetic pole logarithm p is 3, number of phases m is 3 o'clock, adopts fractional-slot structureNumber of stator slots Z be 9. Particularly, as shown in Figure 4, show 6 rotor magnetic poles, i.e. pole pairsNumber p is 3, and in the situation that adopting three phase windings, number of stator slots is 9, and stator has adopted every extremely every phaseGroove number is 0.5 fractional-slot structure.
As shown in Figure 5, show according to the hidden pole type of the draining pump of embodiment of the present invention brushless motorThe schematic diagram of rotor magnetic pole structure. Described distributed polar rotor field structure is surface-type rotor magnetic pole structure,Permanent magnet is fixedly mounted on the surface of rotor core, the quadrature axis direction magnetic resistance of non-salient pole structure and d-axis direction magneticResistance is equal, and quadrature axis direction synchronous reactance and d-axis direction synchronous reactance equate, and described non-salient pole structureMagnetic leakage factor is smaller, and the air-gap flux that can produce is larger, because non-salient pole structure can produce comparisonLarge load torque, is suitable for bearing power to require larger occasion.
As shown in Figure 6, show according to the salient pole type of the draining pump of embodiment of the present invention brushless motorThe schematic diagram of rotor magnetic pole structure. Described salient pole type rotor field structure is built-in rotor field structure,Permanent magnet is fixedly mounted on the inside of rotor core, and the quadrature axis direction magnetic resistance of salient-pole structure is less than d-axis directionMagnetic resistance, quadrature axis direction synchronous reactance is greater than d-axis direction synchronous reactance, and the electromagnetism of described salient-pole structureTorque, except comprising basic torque part, also comprises reluctance torque part, so salient-pole structure canProduce larger detent torque, be suitable for startability to require higher occasion, in addition, salient poleStructure is because its magnetic leakage factor is relatively large, and air-gap flux is relatively little, can be relatively easy to by weakMagnetic speed governing, is applicable to electromotor velocity to have the occasion of requirement.
As shown in Figure 5 and Figure 6, also on described rotor assembly, be provided with by plastics or epoxy resin and formShell 2223.
In order to make motor obtain less torque pulsation and noise, rotor magnetic poles place producesIt is sinusoidal wave that air-gap field waveform is preferably, but in actual design process, take into account the performance of motorRequirement, it is sinusoidal wave that the air-gap field waveform that motor rotor field structure produces can only be approximately conventionally,If rotor magnetic pole shared electric angle within the scope of corresponding pole span is excessive, air-gap field waveform flatTop width is spent greatly, and the air-gap field waveform producing is similar to square wave, the torque pulsation that motor producesExcessive, cause motor noise to become large; Otherwise, rotor magnetic pole shared electricity within the scope of corresponding pole spanGas angle too small, although the air-gap field waveform producing can be similar to sine wave better, due toThe shared scope of pole span scope internal rotor magnetic pole is too small, causes air-gap flux to diminish, thereby causes listThe power density of position volume motor diminishes, and cannot meet actual performance requirement.
In the present invention, in order to optimize the performance requirement of air-gap field waveform and guarantee motor, preferably,Single rotor magnetic pole shared electric angle scope within the scope of corresponding pole span is defined as to 90 °-120 °.The brushless motor of the non-salient pole structure taking magnetic pole logarithm p as 3 is as example, the mechanical angle that an one pole span is sharedDegree δ is 360 °/2p=60 °, if the mechanical angle of corresponding pole span scope internal rotor magnetic poleBe 30 °,Rotor magnetic pole shared electric angle within the scope of corresponding pole span isIf rightThe mechanical angle of the pole span scope internal rotor magnetic pole of answeringBe 40 °, rotor magnetic pole is at corresponding pole span modelEnclosing interior shared electric angle is
Therefore,, in the rotor magnetic pole structure shown in Fig. 5 and Fig. 6, preferably, single rotor magnetic pole existsWithin the scope of corresponding pole span, shared electric angle scope is 90 °-120 °.
As shown in Figure 7, according to the three-phase of the draining pump of embodiment of the present invention brushless motor just showChorded winding distribution map.
Existing threephase motor adopts three phase windings of 60 ° of facies tracts conventionally, and this three phase winding can adoptDelta connection or star connection, it belongs to six-phase motor in essence.
Three phase sine winding distribution map as shown in Figure 7, wherein, connects employing delta connection and starTwo parts windings in series of method or be parallel to form three phase windings, its for three-phase of adopting 30 ° of facies tracts aroundGroup, belongs to phase motor in essence.
In Fig. 7, taking the fractional-slot brushless motor of 4 utmost point 6 grooves as example, its three phase winding be sinusoidal aroundWhen component cloth, each groove have respectively the delta windings of 1 30 ° of facies tract and the star of 1 30 ° of facies tract aroundGroup, the electric angle between delta windings and star winding differs 30 °.
Three phase sine winding is as shown in Figure 7 two parts windings in series of delta connection and star connectionOr be parallel in a motor, can eliminate or significantly reduce the higher hamonic wave in winding magnetic potential, carryHigh fundamental wave winding coefficient; Can effectively reduce spuious consumption and copper loss in motor, improve rising of motorMove and runnability, reduce vibrating noise.
Next, describe according to the brushless electricity of the draining pump of the embodiment of the present invention with reference to Fig. 8-Figure 11The control method of motivation, realizes described control by described draining pump with the control panel 224 of brushless motorMethod processed.
According to the embodiment of the present invention, by control to the threephase stator of described draining pump brushless motor aroundThe amplitude of the three-phase alternating voltage that group applies and phase place are controlled the rotation of described draining pump brushless motorDirection and rotary speed. In the present invention, adopt three-phase inverting circuit to described draining pump with brushlessThe threephase stator winding power supply of motor.
As shown in Figure 8, shown for to powering according to the draining pump of embodiment of the present invention brushless motorThe schematic diagram of three-phase inverting circuit, described three-phase inverting circuit is arranged on described control panel 224. LogicalCross dc bus and input substantially invariable DC voltage to this three-phase inverting circuit, this substantially invariable direct currentVoltage can be by obtaining Domestic single-phase AC rectification. In Fig. 8, in order to simplify, do not illustrateBe used for Domestic single-phase AC rectification, filtering, voltage stabilizing to obtain the circuit of substantially invariable DC voltageFigure, and only with dc source UdForm shows described substantially invariable DC current. Therefore, Ying LiaoSeparate, the invention is not restricted to the form shown in Fig. 8, those skilled in the art can adopt any equivalence to replaceForm is come to the described substantially invariable DC voltage of described three-phase inverting circuit input.
Described three-phase inverting circuit comprises six brachium pontis S1-S6, and each brachium pontis comprises 180 ° of conductingsDevice for power switching and respectively with the diode of this device for power switching reverse parallel connection. Brachium pontis S1-S2For to described draining pump with the first-phase stator winding of the threephase stator winding of brushless motor (for exampleA phase stator winding) first-phase voltage is provided, brachium pontis S3-S4 is used for to described draining pump brushless electricSecond-phase stator winding (for example B phase stator winding) in the threephase stator winding of machine provides second-phase electricityPress, brachium pontis S5-S6 is for the third phase with the threephase stator winding of brushless motor to described draining pumpStator winding (for example C phase stator winding) provides third phase voltage.
As shown in Figure 9, show according to the controller chassis of the draining pump of embodiment of the present invention brushless motorFigure.
In the household electrical appliance such as washing machine, dish-washing machine, be all conventionally according to preset program move washing,The processes such as draining, rinsing, draining, in these processes, may have not the discharge in draining pumpSame requirement, correspondingly may have different requirements to draining pump by the speed of service of brushless motor.Can be according to described preset program, correspondingly according to waiting in described washing, draining, rinsing, drainingThe requirement by the speed of service of brushless motor to draining pump in journey, described draining pump prepared in advance is with brushlessThe speed of service curve of motor, comes described row according to described speed of service curve prepared in advance thenWater pump is realized closed-loop control by the speed of service of brushless motor, makes described draining pump brushless electricThe operation of machine is carried out in strict accordance with described speed of service curve prepared in advance.
According to the embodiment of the present invention, adopt space vector pulse width modulation to realize described three-phase inversionThe control of circuit, and at described draining pump with adopting position-sensor-free technology to enter in brushless motorThe estimation of row rotor of motor having no brush position and speed.
Traditional rotor magnetic pole position detection method includes position sensor detection method and position sensorlessDevice detection method, position sensor detection method need to increase position probing conventionally on motor bodySensor, such as Hall components and parts, photoelectric encoder etc., although the method can ensure higher detectionPrecision, but because the increase of position sensor will cause the rising of cost, and position sensor relatively holdsBe vulnerable to the impact of extraneous factor, its anti-interference is not very good, so its position detection accuracy will be subject toTo certain impact; And the position-sensor-free method conventionally adopting is counter electromotive force zero passage method, although shouldMethod is comparatively simple comparatively speaking, but the accuracy of detection of rotor-position is not too high.
As shown in Figure 9, in the time that described brushless motor starts and in running, adopt without positionSensor technology is estimated position and the speed of described rotor of motor having no brush. Particularly, according to the present inventionEmbodiment, adopts sliding-mode control to detect position and the speed of described rotor of motor having no brush, and this is slidingMould control method can be described as again sliding mode observer method. Described sliding-mode control is to become structure controlA kind of control strategy of system, this strategy has the switching characteristic that the system architecture of making changes at any time, this controlFor control system designs a special diverter surface in advance in state space, utilize discontinuous control ruleRule, the constantly structure of transformation system, under certain condition along regulation state trajectory do by a small margin,High-frequency moves up and down. Force the state of system to slide to equalization point along this specific diverter surface,In the field of rear progressive certain permission that is stable at equalization point or equalization point, i.e. sliding mode motion. SystemOnce enter sliding formwork state, the transfer of system mode is changed and external disturbance by the original parameter of system just no longerImpact, there is very strong robustness. Sliding-mode control of the present invention is carried out detection rotor magnetic polePosition has higher accuracy of detection and stronger anti-interference.
In addition, the general principle of described space vector pulse width modulation is: when three-phase alternating voltage passes through(6 set of power switches of three-phase inverting circuit have become 8 kinds of space voltage vectors to three-phase inverting circuitState, i.e. 6 effective vector states and 2 zero vector state) connect with the three phase sine winding of motorWhile connecing, by reasonable selection and 8 space voltage vectors of combination, and regulate and control selected space voltage arrowThe action time of amount can produce more circular rotating excitation field in the air gap of motor, and it exports electricityPress and electric current closer to sine wave, thereby can effectively control the torque pulsation of motor, make motorEven running, noise is lower. And the frequency that is input to the electric current of stator winding after inverter circuit can rootSituation according to actual loading regulates.
Correspondingly, on described control panel 224, except being furnished with three-phase inverting circuit, be also furnished withCircuit control assembly, this circuit control assembly adopts three contraries described in space vector pulse width modulation controlThe three-phase voltage of the threephase stator winding output described in power transformation road direction on stator module.
In addition, on described control panel 224, be also furnished with detection part and analog-to-digital conversion parts, described inspectionSurvey parts are exported to the threephase stator winding on described stator module for detection of described three-phase inverting circuitThree-phase voltage and three-phase current and output three-phase voltage detection signal and three-phase current detection signal; DescribedAnalog-to-digital conversion parts are by detected described detection part three-phase voltage detection signal and three-phase current detectionSignal is converted to digital voltage signal and digital current signal, and by the digital voltage signal being converted to andDigital current signal offers described circuit control assembly.
In addition, described control panel 224 also comprises can differential amplification parts, described differential amplification parts clothPut between described detection part and described analog-to-digital conversion parts, and described in receiving from described detection partThree-phase voltage detection signal and three-phase current detection signal, amplify described three-phase voltage detection signal and three-phaseCurrent detection signal, and three-phase voltage detection signal and three-phase current detection signal after amplifying are outputed toDescribed analog-to-digital conversion parts.
In addition, described circuit control assembly also utilizes the digital voltage letter receiving from described analog-to-digital conversion partsNumber and digital current signal, adopt sliding-mode control to estimate the position of the rotor magnetic pole of described rotor assembly.Should be appreciated that, described circuit control assembly can be real by one or more microprocessors or digital signal processorExisting. Particularly, for example described circuit control assembly is realized by a slice MCU, and it had both adopted space vectorPulse modulation technique realizes the control to described inverter circuit, also adopts sliding formwork control mode estimated rotor magneticThe position of the utmost point. Alternatively, described circuit control assembly is realized by two MCU, and wherein a slice MCU adoptsRealize the control to described three-phase inverting circuit by space vector pulse modulation technique, another sheet MCU adoptsWith the position of sliding formwork control mode estimated rotor magnetic pole.
Then, described circuit control assembly utilizes position and the described numeral of estimated rotor magnetic poleVoltage signal and digital current signal, adopt space vector pulse width modulation to produce and be used for controlling described threeThe pulse signal of the device for power switching in phase inverter circuit.
According to the embodiment of the present invention, detect three-phase current Ia, the Ib and the Ic that obtain described brushless motor,Through clark conversion, be plane by detected three-phase current Ia, Ib and Ic from spatial coordinate transformationI α under coordinate system and I β, then convert again by the I α under plane coordinate system and I β conversion by parkFor the excitation current component Id under rotating coordinate system and torque current component Iq.
Clark conversion
Park conversion
Wherein, θ represents the position of the rotor magnetic pole of described brushless motor, i.e. the angle of d axle and α axle.As previously mentioned, can adopt sliding-mode control to estimate θ.
According to the embodiment of the present invention, preferably, adopt the control of direct-axis current desired value/reference value Idref=0System strategy; In addition, calculate to obtain quadrature axis according to the PID of the difference of desired speed value and values for actual speedElectric current desired value/reference value Iqref. As known in the art, direct-axis current component is excitation current component,And quadrature axis current component is torque current component, according to the embodiment of the present invention, by making Idref=0, andAdopt maximum torque control method to obtain the torque capacity of motor.
According to the embodiment of the present invention, according to direct-axis current desired value Idref and quadrature axis electric current desired value IqrefPID calculate to obtain direct-axis voltage Vd and quadrature-axis voltage Vq, adopt current feedback and employingPID mode control current deviation, then passes through park inverse transformation by direct-axis voltage Vd and quadrature-axis voltage VqBe converted into V α and I β under plane coordinate system, and then process clark inverse transformation is by under plane coordinate systemV α and V β be converted into three-phase voltage Va, Vb and Vc.
Park inverse transformation
Clark inverse transformation
Particularly, adopt space vector pulse width modulation to control described three-phase inverting circuit, although logicalCross park inverse transformation and clark inverse transformation has obtained three-phase voltage Va, Vb and Vc, but should be appreciated that,Adopting PWM to control in the process of described three-phase inverting circuit, still need according to obtained three-phase voltageVa, Vb and Vc correspondingly produce the pulse signal of six brachium pontis S1-S6 shown in control chart 8.
In addition, described control panel also comprises three-phase output end and earth terminal, described three-phase output end respectively withThe three-phase output end of described three-phase inverting circuit connects and is connected respectively institute with described threephase stator windingState that earth terminal is connected with the central point of described three-phase inverting circuit and with the center of described threephase stator windingPoint connects.
It should be noted that at the cloth of described control panel and be set up, high pressure and low pressure should be separated, particularly, by instituteState three-phase inverting circuit and described detection part is arranged together, and by described circuit control assembly, instituteState differential amplification parts and described analog-to-digital conversion parts and described three-phase inverting circuit and described detection part everyOpen layout. In addition, also should just large current signal and little current signal separate, particularly, by described inspectionThe detection signal wiring of surveying parts separates with control signal wiring. In addition, preferably, at described control panelUpper, adopt the distance between centers of tracks of walking more than 8mil.
As shown in figure 10, show according to the air gap magnetic of the draining pump of embodiment of the present invention brushless motorThe schematic diagram of field wave shape, can find out, the gas according to the draining pump of the embodiment of the present invention with brushless motorBreath magnetic field is approximately sinusoidal wave. As shown in figure 11, show the draining pump nothing according to the embodiment of the present inventionThe schematic diagram of current waveform of the stator winding of brush motor, can find out, according to the embodiment of the present inventionDraining pump approaches sinusoidal wave with the current waveform of the stator winding of brushless motor very much.
Realized the real-time control of the speed to described draining pump brushless motor by said process. To the greatest extentPipe launches as an example of speed of service curve prepared in advance example to describe above, but should be appreciated that, also can adoptTorque curve prepared in advance is controlled with brushless motor described draining pump.
Can adopt cheap with the control of brushless motor according to the described draining pump of the embodiment of the present inventionMCU realizes, and is applicable to being very much applied to the draining pump class motor applications field of household electrical appliance.
According to a preferred embodiment of the invention, also provide a kind of impeller for drainage pump 130. This draining pumpBe configured to be particularly suitable for use together with brushless motor of the present invention with impeller 130, realize higherDrainage efficiency. As shown in figure 12, show according to the impeller for drainage pump 130 of the embodiment of the present inventionThree-dimensional view, as shown in figure 13, shows according to the front view of the impeller for drainage pump of the embodiment of the present invention,And Figure 14 shows the amplification partial elevation view according to the impeller for drainage pump of the embodiment of the present invention.
As shown in figure 12, drain pump impeller 130 according to a preferred embodiment of the invention, comprise wheel hub 131,Wheel disc 132 and multiple blade 133 being arranged on wheel disc 132, described wheel hub 131, wheel disc 132 and leafSheet 133 can be one-body molded. According to the embodiment of the present invention, by adopting wheel disc design, current are preventedImpact to end cap and the damage causing thus, meanwhile, the axial force producing due to current is less, avoidsThe impacts of current to motor shaft and rotor, prevent from causing thus rotor off-axis, produce noise,Ensure that it,, in axially normal work, has extended its working life. In addition, adopt wheel disc design, also can preventForeign material in sealing are followed the vortex of water, arrive bearing place, are wrapped on the axle of water pump long-playAfter make pump shaft produce resistance, normally draining, makes water pump stall seriously time, burns out.
Described blade 133 around impeller bore 134 be evenly spaced apart and arranged on wheel disc 132 and shape identical,Described blade 133 with impeller axis (in the time that impeller is connected to motor shaft, this impeller axis and motor shaftAxis conllinear) cross sectional shape in vertical plane is arc, two end parts of described blade 133Cloth is on two unequal circumference of radius, and the arrival end of each blade 133 is arranged on equably at toolHave on the circumference of minor radius, the port of export is arranged on the circumference with large radius equably, and these two circlesZhou Junyu impeller bore 134 is concentric circles. Blade 133 in the plane vertical with impeller axis cross sectionShape is consistent in blade height direction (being impeller axis direction).
As shown in figure 14, the described cross section of blade 133 is curved shape. This bending sections shape comprises neighbourFirst curved section at nearly blade inlet end place, and second curved section at blades adjacent port of export place. EnterFirst curved section at mouth end place has first curvature radius R1, and the second curved section tool at port of export placeThere is second curvature radius R2. And in this embodiment, the center of curvature of the first and second curved section is positioned atThe same side of blade. Radius of curvature is herein that the cross sectional shape of the working surface based on blade limits.First curvature radius R1 is different from second curvature radius R2. In this embodiment, first curvature radius R1Be greater than second curvature radius R2. The first curved section and the second curved section smooth connection. Smooth connection isRefer to can lead continuously at tie point place and first derivative continuous. From angle directly perceived, smooth connection refers to and connects twoBe connected the tangential direction conllinear of section at contact place. In addition the first curved section and the second curved section,Between can also pass through the 3rd curved section smooth connection, the 3rd curved section is straight line or smoothed curve.Preferably, the 3rd curved section has the 3rd radius of curvature, and the 3rd radius of curvature can be firstBetween radius of curvature R 1 and second curvature radius R2. As shown in figure 13, above-mentioned section of blade 133In face shape, the tangent line at arrival end place and impeller 133 are at radial direction (this position and the leaf of this positionThe wheel line of centres residing direction) angle be the inlet angle α of blade 133, the arc of described blade 133Shape is being positioned at the tangent line of end of circumference of relatively large radius and impeller 133 folder at the radius of this positionAngle is the angle of outlet β of blade 133, and the inlet angle α of described blade 133 is 0-25 °, described blade 133Angle of outlet β be 70-90 °. According to the embodiment of the present invention, by adopting arc shaped blade, blade is adoptedThe most reasonably inlet blade angle and outlet blade angle, reduce flow losses, improved operating efficiency.
In addition, on described wheel disc 132, the disk-shaped regions between impeller bore 134 and blade 133 arrival ends is alsoCan be provided with several relief holes 135. According to the embodiment of the present invention, design by relief hole, ensureWheel disc two side hydraulic pressures identical, avoid the excessive damage that wheel disc is caused of a side water impact.
Embodiment as shown in Figures 12 and 13 comprises 133 and 4 relief holes 135 of 11 blades.But, the invention is not restricted to this, can comprise blade 133 and any right quantity of any right quantityRelief hole 135, preferably the quantity of blade 133 is 8-12, the quantity of relief hole is 2-6.
Blade in above-described embodiment can be integrally formed as single-piece, makes thus to manufacture to simplify, easilyRealize batch production. Can be by integrally formed this blades of variety of way such as injection moulding, molded, machineds.Simple in structure according to the impeller for drainage pump of the embodiment of the present invention, operating efficiency is higher, and the life-span is longer, andBe applicable to batch production.
As shown in figure 15, show insulating boot 230 according to a preferred embodiment of the invention. Insulating boot 230On be provided with terminal protection structure 141. Insulating boot 230 is an end opening, the tubular knot of other end sealingStructure. The open end of insulating boot 230 receives some parts of motor portion 2, and connects with main casing 21Connect. On the sidewall of insulating boot 230, comprise the terminal mouth 142 for binding post is set. Terminal protecting knotStructure 141 is from the outwardly directed inversion L shaped plate of insulating boot 230 above the terminal mouth 142 of insulating boot.
Terminal protection structure 141 is included in terminal mouth 142 tops and extends to form the substrate 143 of dash penthouseWith the batten plate 144 dangling in terminal mouth 142 side direction. In the direction of insertion in terminal insertion end rim of the mouth 142,Substrate 143 is parallel to this direction of insertion and extends. In addition, substrate 143 along electrical axis towards insulating bootClosed end direction is downward-sloping slightly. The angle of 45 ° is preferably selected to be less than in this angle of inclination, more preferablyBeing chosen in the angle between 5 ° to 30 °, is 10 ° in the present embodiment. Batten plate 144 is at substrate 143Base along (along the most close insulating boot closed end of electrical axis direction) locate or near be connected to substrate143 and from its extension of dangling downwards.
In addition, terminal protection structure 141 preferably includes flash edge and the outermost edge from substrate 143Wall portion 145 and the wall portion 146 that upwards hold up at place.
The substrate 143 of terminal protection structure 141 and batten plate 144 forming sections are around the inversion L of terminal mouthShape structure, and substrate 143 and the wall portion 145 of holding up from substrate and wall portion 146 and insulating boot 230Sidewall forms a rhone, and in the time having water droplet to drop on substrate, water just can slide to side along substrate 143,And flow down along batten plate 144, thereby prevent that water droplet from falling in terminal and terminal mouth, prevent that short circuit from occurring,Thereby play a protective role.
Describe each embodiment of the present invention in the above in detail. But those skilled in the art should manageSeparate, without departing from the principles and spirit of the present invention, can carry out various amendments to these embodiment,Combination or sub-portfolio, and such amendment should fall within the scope of the present invention.
Claims (20)
1. a draining pump, is characterized in that, described draining pump comprises impeller and the nothing for drives impellerBrush motor, this impeller comprises wheel disc and multiple blade being arranged on wheel disc, described blade is from roulette tableFace extends away from sheave surface along impeller axis direction, and have the first end of adjacent impeller axis and away fromImpeller axis and second end relative with first end;
Its Leaf has the cross sectional shape of smooth curved, described section in the plane perpendicular to impeller axisFace shape at least comprises the first curved section of contiguous first end and the second curved section of contiguous the second end,The first curved section has first curvature radius, and the second curved section has the first curvature radius of being different fromSecond curvature radius, wherein first curvature radius is greater than second curvature radius, the first curved section isThe tangent line at one end place and the inlet angle α that is blade at the angle of the radial direction of this position, described bladeInlet angle α is 0-25 °; And the second curved section the tangent line at the second end place with this position radially sideTo the angle angle of outlet β that is blade, the angle of outlet β of described blade is 70-90 °.
2. draining pump as claimed in claim 1, is characterized in that, the entrance that wherein first end is bladeThe port of export that end and the second end are blade.
3. draining pump as claimed in claim 1, is characterized in that, the first curved section and the second arcThe center of curvature of section is in the same side of blade.
4. draining pump as claimed in claim 1, is characterized in that, blade also comprises and is positioned at the first arcThe 3rd section of the linearity between section and the second curved section or arc.
5. draining pump as claimed in claim 4, is characterized in that, the 3rd section is for having the 3rd songThe 3rd curved section of rate radius, the 3rd radius of curvature is greater than the first and second radius of curvature.
6. draining pump as claimed in claim 4, is characterized in that, the 3rd section is for having the 3rd songThe 3rd curved section of rate radius, the 3rd radius of curvature is between the first and second radius of curvature.
7. draining pump as claimed in claim 1, is characterized in that, wheel disk center has impeller bore, usesIn being connected with motor reel, in the annular section between impeller bore and the first end of blade, be provided with at least oneIndividual relief hole.
8. draining pump as claimed in claim 1, is characterized in that, described wheel disc and blade are integrally formedFor single-piece.
9. draining pump claimed in claim 1, is characterized in that, described brushless motor comprises:
Motor casing;
Motor shaft;
Rotor assembly, is arranged on synchronous rotary on described motor shaft and with the rotation of described motor shaft, bagDraw together rotor core and embed the rotor magnetic pole on described rotor core;
Stator module, comprises stator core and is wound on the threephase stator winding in stator core slot; WithAnd
Control panel, comprises three-phase inverting circuit, and comprises circuit control assembly, this circuit control assemblyAdopt three-phase inverting circuit described in space vector pulse width modulation control to the three-phase on described stator moduleThe three-phase voltage of stator winding output,
Wherein, described control panel is all contained in described motor casing.
10. draining pump as claimed in claim 9, is characterized in that, described stator module adopts markGroove structure.
11. draining pumps as claimed in claim 9, is characterized in that, single in described rotor assemblyRotor magnetic pole shared electric angle scope within the scope of corresponding pole span is 90 °-120 °.
12. draining pumps as claimed in claim 9, is characterized in that, described control panel also comprises detectionParts and analog-to-digital conversion parts, described detection part for detection of described three-phase inverting circuit to described statorThe three-phase voltage of the threephase stator winding output on assembly and three-phase current and output three-phase voltage detect letterNumber and three-phase current detection signal; Described analog-to-digital conversion parts are by detected described detection part three-phaseVoltage detection signal and three-phase current detection signal are converted to digital voltage signal and digital current signal, andThe digital voltage signal being converted to and digital current signal are offered to described circuit control assembly.
13. draining pumps as claimed in claim 12, is characterized in that, described circuit control assembly utilizesThe digital voltage signal and the digital current signal that receive from described analog-to-digital conversion parts, adopt sliding formwork controlling partyMethod is estimated the position of the rotor magnetic pole of described rotor assembly.
14. draining pumps as claimed in claim 13, is characterized in that, described circuit control assembly utilizesThe position of estimated rotor magnetic pole and described digital voltage signal and digital current signal, adopt emptyBetween vector pulse modulation technology produce the arteries and veins of device for power switching for controlling described three-phase inverting circuitRush signal.
15. draining pumps as claimed in claim 14, is characterized in that, described control panel also comprises differenceAmplifier unit, described differential amplification parts from described detection part receive described three-phase voltage detection signal andThree-phase current detection signal, amplifies described three-phase voltage detection signal and three-phase current detection signal, and willThree-phase voltage detection signal after amplification and three-phase current detection signal output to described analog-to-digital conversion parts.
16. draining pumps as claimed in claim 9, is characterized in that, described circuit control assembly is oneIndividual or multi-microprocessor or digital signal processor.
17. draining pumps as claimed in claim 9, is characterized in that, described control panel also comprises three-phaseOutput and ground, described three-phase output end connects with the three-phase output end of described three-phase inverting circuit respectivelyConnect and be connected with described threephase stator winding respectively, in described earth terminal and described three-phase inverting circuitHeart point connects and is connected with the central point of described threephase stator winding.
18. draining pumps as claimed in claim 15, is characterized in that, on described control panel, described inThree-phase inverting circuit and described detection part are arranged together, and described circuit control assembly, described differenceAmplifier unit and described analog-to-digital conversion parts and described three-phase inverting circuit and described detection part separate clothPut.
19. draining pumps as claimed in claim 9, is characterized in that, described control panel is joined by machineryThe mode of closing and described stator module are fixed together.
20. draining pumps as claimed in claim 1, is characterized in that, described draining pump is for dish-washing machineOr in washing machine.
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| CN201310149559.6A CN103216452B (en) | 2013-04-25 | 2013-04-25 | Draining pump |
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| CN201310149559.6A CN103216452B (en) | 2013-04-25 | 2013-04-25 | Draining pump |
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| CN103216452B true CN103216452B (en) | 2016-05-11 |
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| CN104124849B (en) * | 2013-04-25 | 2018-03-27 | 常州雷利电机科技有限公司 | Draining pump brushless motor and draining pump |
| CN104564804B (en) * | 2013-10-22 | 2018-04-13 | 珠海格力电器股份有限公司 | The design method of wind wheel blade and tubular wine wheel and wind wheel blade |
| CN103629119A (en) * | 2013-12-10 | 2014-03-12 | 东莞市深鹏电子有限公司 | Direct-current brushless mute water pump |
| CN105873818A (en) * | 2013-12-23 | 2016-08-17 | 海德罗布拉斯特因派勒公司 | Marine propulsion unit |
| CN104929973A (en) * | 2015-05-08 | 2015-09-23 | 江苏大学 | Multiple-stage centrifugal pump impeller matched with radial guide vane |
| CN111306071B (en) * | 2015-07-24 | 2021-06-15 | 浙江三花汽车零部件有限公司 | Rotor assembly and electronic pump |
| CN105715445A (en) * | 2016-02-19 | 2016-06-29 | 于法周 | Rotary driving type water-wheel body |
| TWI632302B (en) * | 2017-08-10 | 2018-08-11 | 奇鋐科技股份有限公司 | Cooling fan structure of cylindrical fan blade |
| CN109873581A (en) * | 2017-12-04 | 2019-06-11 | 北京自动化控制设备研究所 | A kind of direct method for control speed of permanent magnet synchronous motor neural network based |
| CN107938266A (en) * | 2017-12-29 | 2018-04-20 | 南京乐金熊猫电器有限公司 | Foreign matter cognitive method and method is broken away from a kind of drainage pump of washing machine |
| TWI704291B (en) * | 2019-08-12 | 2020-09-11 | 訊凱國際股份有限公司 | Magnetic drive pump |
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