CN109217577A - Permanent magnet DC motor and food processor - Google Patents
Permanent magnet DC motor and food processor Download PDFInfo
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- CN109217577A CN109217577A CN201710553181.4A CN201710553181A CN109217577A CN 109217577 A CN109217577 A CN 109217577A CN 201710553181 A CN201710553181 A CN 201710553181A CN 109217577 A CN109217577 A CN 109217577A
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- commutator
- permanent magnet
- winding
- commutator segment
- ontology
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K13/00—Structural associations of current collectors with motors or generators, e.g. brush mounting plates or connections to windings; Disposition of current collectors in motors or generators; Arrangements for improving commutation
- H02K13/006—Structural associations of commutators
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K13/00—Structural associations of current collectors with motors or generators, e.g. brush mounting plates or connections to windings; Disposition of current collectors in motors or generators; Arrangements for improving commutation
- H02K13/10—Arrangements of brushes or commutators specially adapted for improving commutation
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K13/00—Structural associations of current collectors with motors or generators, e.g. brush mounting plates or connections to windings; Disposition of current collectors in motors or generators; Arrangements for improving commutation
- H02K13/10—Arrangements of brushes or commutators specially adapted for improving commutation
- H02K13/105—Spark suppressors associated with the commutator
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
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- Dc Machiner (AREA)
Abstract
The present invention provides a kind of permanent magnet DC motors for food processor, comprising: field frame assembly；Rotor assembly comprising shaft, commutator, rotor core and winding, commutator are set in shaft, and rotor core is fixed in shaft, and winding slot is provided on rotor core, and winding is located in winding slot, and the interface line of winding is electrically connected with commutator；Commutator includes ontology and at least one commutator segment, ontology is cylindrical, commutator segment is covered on the outer wall of ontology, multiple commutator segments are uniformly distributed along the circumferential direction of ontology, commutator segment extends along the short transverse of ontology, the ratio of the quantity of the quantity and commutator segment of winding slot is less than or equal to 1/3, the commutator segment quantity on commutator can be increased, so that the pressure drop between commutator segment reduces, and then reduce the electric discharge pressure difference between carbon brush and commutator, discharge current reduces therewith, to reduce the electric spark generated when permanent magnet DC motor operation, it avoids permanent magnet DC motor and commutation deterioration occurs.
Description
Technical field
The present invention relates to household appliance technical fields, more specifically, are related to a kind of permanent magnet DC motor and food processor.
Background technique
As people's living standard is continuously improved, people are to food processing mode it is also proposed that more and more demands, food
Processor (such as wall-breaking machine, juice extractor, cooking machine and soy bean milk making machine) has the diversity of processed food because of it, is able to satisfy different user
Different demands, gradually by the favor of consumer；And important component of the permanent magnet DC motor as food processor, such as
What not only can guarantee its high load revolving speed, but also can guarantee its safety used, become people's urgent problem to be solved.
Permanent magnet DC motor in the related art, when output torque is more than or equal to 0.5N ˙ m, revolving speed is respectively less than
10krpm；When being greater than 10krpm such as revolving speed, motor deteriorates there is commutation, and generation is greater than 2 grades of commutation spark, especially in volume
When constant voltage 220V or more, motor commutation deteriorates more serious；It is same since commutator in the related technology is hook commutator
When meet the load speed performance of motor, the line footpath of rotor electromagnetism winding must be increased to 0.5mm or more, to make two neighboring change
It is less than 0.5mm to around group distance, and the risk of short circuit occurs.It is greater than in view of the above-mentioned problems, mentioning can be used in the related technology
Rotor core equal to 16 slots or the rotor core using 12 to 14 slots, to guarantee the load speed of motor, but due to by
Structure to hook commutator limits, and the commutator the piece number in both the above scheme is at maximum up to 36, therefore in motor operation
It cannot be effectively reduced the pressure drop on commutator between commutator segment, cause commutation spark to be still greater than 2 grades, also not can guarantee food preparation
The safety of machine in use.
Summary of the invention
The present invention is directed to solve at least one of the technical problems existing in the prior art or related technologies.
For this purpose, it is an object of the present invention to proposing a kind of permanent magnet DC motor.
It is another object of the present invention to propose a kind of food processor.
In view of this, a purpose according to the present invention, provides a kind of permanent magnet DC motor, it is used for food processor,
It include: field frame assembly；Rotor assembly comprising shaft, commutator, rotor core and winding, commutator are set in shaft, are turned
Sub- iron core is fixed in shaft, and winding slot is provided on rotor core, and winding is located in winding slot, the interface line of winding and commutation
Device electrical connection；Commutator includes ontology and at least one commutator segment, and ontology is cylindrical, and commutator segment is covered in the outer wall of ontology
On, multiple commutator segments are uniformly distributed along the circumferential direction of ontology, and commutator segment extends along the short transverse of ontology；The quantity of winding slot with change
It is less than or equal to 1/3 to the ratio of the quantity of piece.
Permanent magnet DC motor provided by the invention, multiple commutator segments are uniformly distributed along the circumferential direction of the ontology of commutator, and are changed
Short transverse to piece along ontology extends, and the ratio by limiting the quantity of winding slot and the quantity of commutator segment is less than or equal to 1/
3, the commutator segment quantity on commutator can be increased, so that the pressure drop between commutator segment reduces, and then make conductive component and commutator
Between electric discharge pressure difference reduce, discharge current reduces therewith, to reduce the electric spark generated when permanent magnet DC motor operation,
It avoids permanent magnet DC motor and commutation deterioration occurs, and then improve the safety that permanent magnet DC motor uses.Rotor core
On be provided with winding slot, for winding provide winding space.
In addition, the permanent magnet DC motor in the above-mentioned technical proposal provided according to the present invention, can also have following additional
Technical characteristic:
In the above-mentioned technical solutions, it is preferable that commutator is groove type reverser, and the value range of the diameter of commutator is
28mm to 45mm；And/or the quantity of commutator segment is greater than or equal to 36；And/or winding slot quantity and commutator segment quantity
Ratio be less than or equal to 1/4.
It in the technical scheme, can be when the diameter of commutator reaches 28mm to 45mm just by using groove type reverser
Large number of commutator segment can be set, compared to hook commutator, be not required to too greatly increase commutator diameter, thus meeting
Spark is reduced in the case where the safety used under high revolving speed.When the diameter of commutator is set greater than 28mm, commutator
Possess bigger outer perimeter, and then guarantee that commutator segment thereon can possess sufficiently large size setting reversing groove, to change
The winding that diameter is more than or equal to 0.5mm is accommodated into slot；When the diameter of commutator is set smaller than 45mm, can avoid to change
Too much to the setting of the diameter of device, linear velocity when commutator being caused to rotate on its periphery is excessive, and then causes commutator in height
The problem of commutator segment is thrown away, causes film flying by the centrifugal force generated when speed rotation, thereby ensures that the security performance of product, simultaneously
Material is saved, is reduced costs.The quantity ratio angle of number of angle and winding slot and commutator segment from commutator segment is limited
Fixed, two conditions at least meet one, can fully ensure that the pressure drop between commutator segment reduces.In general, guaranteeing to commutate
While device moderate dimensions, and enough installation spaces are provided for 36 or more commutator segments.Commutator is groove type reverser, phase
The corresponding winding coil of two commutator segments of neighbour can be isolated from each other, in the case where not increasing commutator diameter, even if increase line footpath
The case where being not in adjacent winding coil contact short circuit, so that the power of permanent magnet DC motor is increased, so that Permanent magnet DC
The torque that motor can meet output simultaneously at work, which is more than or equal to the performance of 0.5Nm and revolving speed more than or equal to 10krpm, to be wanted
Ask, this ensures that when needing to process more food in food processor, can also have enough revolving speeds to food into
The processing such as row high-speed cutting polishing, instantaneous speed and the cutting frequency when guaranteeing the blade cutting of cooking machine or hit food,
To reach balanced processing effect, the mouthfeel of food is improved, the market of product is improved.
In any of the above-described technical solution, it is preferable that the quantity of commutator segment is 48.
In the technical scheme, the quantity of commutator segment is preferably 48, helps to reduce the pressure drop between commutator segment, reduce
The electric spark that permanent magnet DC motor generates when running；The case where quantity corresponding to winding slot is 12 and 16, can satisfy coiling
The quantity ratio of slot and commutator segment is respectively 1/4 and 1/3, meets coiling needs；It is unlikely to simultaneously because the quantity of commutator segment is excessive
And increase difficulty of processing, help to control cost.
In any of the above-described technical solution, it is preferable that each commutator segment radially prolongs towards one end of rotor core
Stretching has a boss, and a line embedding groove is provided on each boss, and line embedding groove extends along the length direction of commutator segment, and interface line is embedding
It is located in line embedding groove；The value range of the ratio between the width of the width of line embedding groove and commutator segment is 1/6 to 1/3.
In the technical scheme, one end of each commutator segment towards rotor core extended radially outward one it is convex
Platform, ensure that on commutator segment has enough spaces to remove setting line embedding groove, and since boss protrudes from the surface of commutator segment, right
When winding is fixed, it can be convenient for being operated in line embedding groove.The value of the ratio between the width of the width of line embedding groove and commutator segment
Range is 1/6 to 1/3, and line embedding groove can place the winding of different-diameter, when the ratio between the width of line embedding groove and the width of commutator segment
When up to 1/3, the winding being relatively large in diameter can be placed, keeps the resistance of winding smaller, and then the electric current for flowing through winding is larger, correspondingly
Improve the power of permanent magnet DC motor.Interface line is embedded in line embedding groove, and winding is enable to be securely fixed in line embedding groove,
Prevent winding from falling off.
In any of the above-described technical solution, it is preferable that commutator further includes at least one insulation division, and an insulation division is located at
Between two commutator segments；The width of insulation division is greater than or equal to 0.5mm.
In the technical scheme, at least one insulation division of commutator is located between two commutator segments, can effectively prevent changing
To being connected to each other when hypotelorism between piece, conducting generates short circuit, not only ensure that the normal work of permanent magnet DC motor, but also avoid
Cause fire, improves the safety that permanent magnet DC motor uses；The width of insulation division is greater than or equal to 0.5mm, Ke Yibao
The electrical distance having between adjacent commutator segment more than or equal to 0.5mm is demonstrate,proved, the reliability of motor is improved.
In any of the above-described technical solution, it is preferable that insulation division is insulating trip or insulation tank.
In the technical scheme, insulation division is insulating trip or insulation tank, and structure is simple, manufacture easy to process, and can be effective
The conducting that is connected to each other between barrier winding generates short circuit.
In any of the above-described technical solution, it is preferable that ontology is bakelite.
In the technical scheme, ontology is bakelite, and bakelite has non-conductive, high temperature resistant, intensity height, good insulating, plastic
Property good advantage, further prevent commutator segment to pass through the ontology being connected and be conducted, and then lead the winding on commutator segment each other
Logical, short circuit occurs for entire circuit, causes permanent magnet DC motor to break down or even causes fire.
In any of the above-described technical solution, it is preferable that further include: carbon brush comprising anode carbon brush and cathode carbon brush, the two
The two sides of commutator are symmetrically distributed in, carbon brush is rectangular strip, and carbon brush is its thickness a, carbon along the size of the length direction of shaft
Brushing the size in the line direction of anode carbon brush and cathode carbon brush is its length, another having a size of its width b, the thickness a of carbon brush
It is greater than or equal to 1.7 with the ratio a/b of width b.
In the technical scheme, anode carbon brush and cathode carbon brush are symmetrically distributed in the two sides of commutator, change motor completion
To movement.In commutation process, the winding completely attached to carbon brush can become invalid winding because of short circuit, and invalid winding is more, turn
Torque of the sub- assembly under electromagnetic force can reduce the whole torque of permanent magnet DC motor with regard to smaller, while also increase accordingly
Electric current in other effective windings, damages motor.Ratio a/b by limiting the thickness a and width b of carbon brush is greater than
Or it is equal to 1.7, it can reduce the width of carbon brush, and then reduce single contact the piece number of the carbon brush with commutator in operational process, make
The quantity for obtaining invalid winding reduces, it is ensured that the torque and reliability of permanent magnet DC motor.
In any of the above-described technical solution, it is preferable that further include: first support assembly and second support assembly, the two point
It is not set in the both ends of shaft, first support assembly, second support assembly and field frame assembly enclose cavity, and rotor assembly is located at
In cavity.
In the technical scheme, first support assembly and second support assembly are respectively sleeved at the both ends of shaft, and first
Frame assembly, second support assembly and field frame assembly enclose cavity, provide installation space for rotor assembly, while avoiding and turning
Sub- assembly is by extraneous pollution.
To sum up, hook commutator in the related technology is enameled wire to be wound on the copper hook of commutator, is made on commutator
Copper sheet be connected with winding, so that contact of the electric current by carbon brush with commutator segment be allowed to flow through winding, rotor assembly is made to generate electricity
Magnetic effect and turning moment；Since the interface line of winding and commutator segment is exposed at outside commutator segment, be such as greater than using line footpath or
Equal to 0.5mm (or sectional area be greater than or equal to 0.2mm2) enameled wire when, adjacent two panels commutator will occur short circuit, to limit
Permanent magnet DC motor processed cannot meet the property that output torque is greater than or equal to 10krpm more than or equal to 0.5N.m and revolving speed simultaneously
It can require, simultaneously because the high rotary speed property of motor, the outer diameter for also limiting commutator cannot be greater than 45mm, thus commutator
The piece number at most can only be 36.And groove type reverser of the invention, it can be when the diameter of commutator reaches 28mm to 45mm just
48 commutator segments are realized, compared to hook commutator, without too greatly increasing commutator diameter, and due to the line embedding groove of commutator
Maximum can be worked into commutator segment it is wide 1/3, make the line footpath of winding can bigizationner；When each group of winding is completed to twine on rotor core
Around rear, the interface line of winding is directly embedded into the line embedding groove per a piece of commutator segment of commutator, then soldering and sealing connection, makes commutator segment
It is connected with winding, so that contact of the electric current by carbon brush with commutator segment be allowed to flow through winding, rotor assembly is made to generate galvanomagnetic-effect
And turning moment, while improving the electric property of permanent magnet DC motor, significantly reduce the commutation of permanent magnet DC motor
Spark.
Another purpose according to the present invention, provides a kind of food processor, comprising: such as any of the above-described technical solution institute
The permanent magnet DC motor stated.
Food processor provided by the invention including permanent magnet DC motor described in any of the above-described technical solution, therefore has
There are whole beneficial effects of the permanent magnet DC motor, details are not described herein.
In any of the above-described technical solution, it is preferable that food processor is at least one of: wall-breaking machine, blender, material
Reason machine, soy bean milk making machine and juice extractor.
In the technical scheme, food processor is at least one of: wall-breaking machine, blender, cooking machine, soy bean milk making machine and
Juice extractor, wherein especially wall-breaking machine needs motor to have biggish power, could smash the cell wall of food, make food
Become extremely fine and smooth, but the power of motor will generate biggish spark, cause security risk once increasing；The present invention provides
Permanent magnet DC motor apply in wall-breaking machine, by commutator be arranged 48 be provided between commutator segment and commutator segment absolutely
Edge, it is ensured that permanent magnet DC motor will not generate biggish spark, improve the safety of use under biggish power.
Additional aspect and advantage of the invention will become obviously in following description section, or practice through the invention
Recognize.
Detailed description of the invention
Above-mentioned and/or additional aspect of the invention and advantage will become from the description of the embodiment in conjunction with the following figures
Obviously and it is readily appreciated that, in which:
Fig. 1 shows cross-sectional view of the permanent magnet DC motor of one embodiment of the present of invention offer on longitudinal section；
Fig. 2 shows the explosion cross-sectional views for the permanent magnet DC motor that one embodiment of the present of invention provides；
Fig. 3 shows cross-sectional view of the commutator of one embodiment of the present of invention offer on longitudinal section；
Fig. 4 shows the top view of the commutator of one embodiment of the present of invention offer；
Fig. 5 shows partial enlarged view of the Fig. 4 of one embodiment of the present of invention at A.
Wherein, corresponding relationship of the Fig. 1 into Fig. 5 between appended drawing reference and component names are as follows:
1 permanent magnet DC motor, 10 field frame assemblies, 20 rotor assemblies, 22 shafts, 24 commutators, 242 ontologies, 244 commutations
Piece, 246 boss, 2462 line embedding grooves, 248 insulation divisions, 26 rotor cores, 28 windings, 30 first support assemblies, 32 first bearings,
40 second support assemblies, 42 second bearings, 50 bolts.
Specific embodiment
To better understand the objects, features and advantages of the present invention, with reference to the accompanying drawing and specific real
Applying mode, the present invention is further described in detail.It should be noted that in the absence of conflict, the implementation of the application
Feature in example and embodiment can be combined with each other.
In the following description, numerous specific details are set forth in order to facilitate a full understanding of the present invention, still, the present invention may be used also
To be implemented using other than the one described here other modes, therefore, protection scope of the present invention is not by described below
Specific embodiment limitation.
The permanent magnet DC motor 1 described according to some embodiments of the invention is described referring to Fig. 1 to Fig. 5.
As depicted in figs. 1 and 2, the embodiment of first aspect present invention proposes a kind of permanent magnet DC motor 1, is used for food
Processor, comprising: field frame assembly 10；Rotor assembly 20 comprising shaft 22, commutator 24, rotor core 26 and winding 28 change
It is set in shaft 22 to device 24, rotor core 26 is fixed in shaft 22, and winding slot, winding 28 are provided on rotor core 26
In winding slot, the interface line of winding 28 is electrically connected with commutator 24；Commutator 24 includes ontology 242 and at least one commutation
Piece 244, ontology 242 is cylindrical, and commutator segment 244 is covered on the outer wall of ontology 242, and multiple commutator segments 244 are along ontology 242
It is circumferentially uniformly distributed, commutator segment 244 extends along the short transverse of ontology 242；The ratio of the quantity of the quantity and commutator segment of winding slot
Value is less than or equal to 1/3.
Permanent magnet DC motor 1 provided by the invention, multiple commutator segments 244 are uniform along the circumferential direction of the ontology 242 of commutator 24
Distribution, and commutator segment 244 extends along the short transverse of ontology 242, by limiting the quantity of winding slot and the quantity of commutator segment 244
Ratio be less than or equal to 1/3, the quantity of the commutator segment 244 on commutator 24 can be increased, so that the pressure drop between commutator segment 244
Reduce, and then reduce the electric discharge pressure difference between conductive component and commutator 24, discharge current reduces therewith, to reduce forever
The electric spark that magnetic direct current generator 1 generates when running avoids permanent magnet DC motor 1 and commutation deterioration occurs, and then improves forever
The safety that magnetic direct current generator 1 uses.It is provided with winding slot on rotor core 26, provides winding space for winding 28.Specifically
Ground, is arranged between any two winding slot with teeth, and winding 28 is located in winding slot and is wrapped on tooth, guarantees that winding 28 is secured
Ground is fixed on rotor core 26, the winding 28 on different teeth, avoids short circuit because winding does not occur each other.It can
Selection of land, commutator segment 244 are copper sheet.
As shown in figure 4, in one embodiment of the invention, it is preferable that commutator 24 is groove type reverser, commutator 24
Diameter value range be 28mm to 45mm；And/or the quantity of commutator segment 244 is greater than or equal to 36；And/or winding slot
Quantity and commutator segment 244 quantity ratio be less than or equal to 1/4.
It in this embodiment, can be when the diameter of commutator 24 reaches 28mm to 45mm just by using groove type reverser
Large number of commutator segment 244 can be set, compared to hook commutator, do not need too greatly to increase commutator diameter, thus
Spark is reduced in the case where the safety used under meeting high revolving speed.When the diameter of commutator 24 is set greater than 28mm
When, commutator 24 possesses bigger outer perimeter, and then the commutator segment 244 of guarantee thereon can possess sufficiently large size setting and change
To slot, to accommodate the winding that diameter is more than or equal to 0.5mm in reversing groove；It is set smaller than when by the diameter of commutator 24
When 45mm, the avoidable diameter setting by commutator 24 is too much, and linear speed when commutator 24 being caused to rotate on its periphery is spent
Greatly, the problem of and then commutator segment 244 is thrown away, causes film flying by the centrifugal force that causes commutator 24 to generate in high-speed rotation, by
This ensure that the security performance of product, while save material, reduce costs.Number of angle and coiling from commutator segment 244
The quantity ratio angle of slot and commutator segment 244 is limited, and two conditions at least meet one, can fully ensure that commutator segment
Pressure drop between 244 reduces.In general, while guaranteeing 24 moderate dimensions of commutator, and the commutator segment for being 36 or more
244 provide enough installation spaces.Commutator 24 is groove type reverser, the corresponding winding coil of adjacent two commutator segment can each other every
From will not occur the feelings of adjacent winding coil contact short circuit increasing line footpath in the case where not increasing commutator diameter
Condition, so that the power of permanent magnet DC motor 1 is increased, so that permanent magnet DC motor 1 can meet the torsion of output simultaneously at work
Square is more than or equal to 0.5Nm and revolving speed is more than or equal to the performance requirement of 10krpm, this ensures that in food processor domestic demand
When processing more food, can also have enough revolving speeds to carry out the processing such as high-speed cutting polishing to food, to guarantee to arrange
Instantaneous speed and the cutting frequency when blade of machine cuts or hit food improve food to reach balanced processing effect
Mouthfeel, improve the market of product.Preferably, the diameter of commutator 24 is 36mm.
In one embodiment of the invention, it is preferable that the quantity of commutator segment 244 is 48.
In this embodiment, the quantity of commutator segment 244 is preferably 48, helps to reduce the pressure drop between commutator segment 244, subtract
The electric spark that small permanent magnet DC motor 1 generates when running；The case where quantity corresponding to winding slot is 12 and 16, can satisfy
The quantity ratio of winding slot and commutator segment 244 is respectively 1/4 and 1/3, meets coiling needs；It is unlikely to simultaneously because of commutator segment 244
Quantity it is excessive and increase difficulty of processing, help to control cost.
As shown in Figure 3 and Figure 4, in one embodiment of the invention, it is preferable that each commutator segment 244 is towards rotor iron
One end of core 26 has extended radially outward a boss 246, and a line embedding groove 2462 is provided on each boss 246, embedding
Slot 2462 extends along the length direction of commutator segment 244, and interface line is embedded in line embedding groove 2462；The width of line embedding groove 2462 with change
The value range of the ratio between width to piece 244 is 1/6 to 1/3.
In this embodiment, one has been extended radially outward in one end of each commutator segment 244 towards rotor core 26
Boss 246, ensure that has enough spaces to remove setting line embedding groove 2462 on commutator segment 244, and changes since boss 246 protrudes from
To the surface of piece 244, when winding 28 is fixed, can be convenient for being operated in line embedding groove 2462.Line embedding groove 2462
The value range of the ratio between the width of width and commutator segment 244 is 1/6 to 1/3, line embedding groove 2462 can place different-diameter around
Group 28 can place the winding 28 being relatively large in diameter when the ratio between width of the width of line embedding groove 2462 and commutator segment 244 is up to 1/3,
Such as the copper wire of diameter 0.8mm, keep the resistance of winding 28 smaller, and then the electric current for flowing through winding 28 is larger, has correspondingly improved forever
The power of magnetic direct current generator 1.Interface line is embedded in line embedding groove 2462, and winding 28 is enable to be securely fixed in line embedding groove 2462
In, prevent winding 28 from falling off.
As shown in figure 5, in one embodiment of the invention, it is preferable that commutator 24 further includes at least one insulation division
248, an insulation division 248 is located between two commutator segments 244；The width of insulation division 248 is greater than or equal to 0.5mm.
In this embodiment, at least one insulation division 248 of commutator 24 is located between two commutator segments 244, can be effective
The conducting generation short circuit that is connected to each other when hypotelorism between commutator segment 244 is prevented, both ensure that the normal work of permanent magnet DC motor 1
Make, in turn avoids causing fire, improve the safety that permanent magnet DC motor 1 uses；The width of insulation division 248 is greater than or equal to
0.5mm, it is ensured that have the electrical distance more than or equal to 0.5mm between adjacent commutator segment, improve the reliability of motor.
In one embodiment of the invention, it is preferable that insulation division 248 is insulating trip or insulation tank.
In this embodiment, insulation division 248 is insulating trip or insulation tank, and structure is simple, manufacture easy to process, and can be effective
The conducting that is connected to each other between barrier winding 28 generates short circuit.
As shown in Figure 3 and Figure 4, in one embodiment of the invention, it is preferable that ontology 242 is bakelite.
In this embodiment, ontology 242 is bakelite, and bakelite has non-conductive, high temperature resistant, intensity height, good insulating, plastic
Property good advantage, further prevent commutator segment 244 to pass through the ontology 242 being connected and be conducted, so make on commutator segment 244 around
Group 28 is connected each other, and short circuit occurs for entire circuit, causes permanent magnet DC motor 1 to break down or even causes fire.
In one embodiment of the invention, it is preferable that further include: carbon brush comprising anode carbon brush and cathode carbon brush, two
Person is symmetrically distributed in the two sides of commutator 24, and carbon brush is rectangular strip, and carbon brush is that it is thick along the size of the length direction of shaft 22
A is spent, size of the carbon brush in the line direction of anode carbon brush and cathode carbon brush is its length, it is another having a size of its width b, carbon brush
The ratio a/b of thickness a and width b is greater than or equal to 1.7.
In this embodiment, anode carbon brush and cathode carbon brush are symmetrically distributed in the two sides of commutator 24, change motor completion
To movement.In commutation process, the winding 28 completely attached to carbon brush can become invalid winding because of short circuit, and invalid winding is more,
Torque of the rotor assembly 20 under electromagnetic force can reduce the whole torque of permanent magnet DC motor 1 with regard to smaller, while also corresponding
The electric current in other effective windings is increased, motor is damaged.It is big by the thickness a and the ratio of width b that limit carbon brush
In or be equal to 1.7, can reduce the width of carbon brush, and then reduce the contact chip of single carbon brush and commutator 24 in operational process
Number, so that the quantity of invalid winding reduces, it is ensured that the torque of permanent magnet DC motor 1 and 22 commutator segment 244 of reliability shaft change
To piece 244.
As depicted in figs. 1 and 2, in one embodiment of the invention, it is preferable that further include: 30 He of first support assembly
Second support assembly 40, the two are respectively sleeved at the both ends of shaft 22, first support assembly 30, second support assembly 40 and stator
Assembly 10 encloses cavity, and rotor assembly 20 is located in cavity.
In this embodiment, first support assembly 30 and second support assembly 40 are respectively sleeved at the both ends of shaft 22, the
One bracket assembly 30, second support assembly 40 and field frame assembly 10 enclose cavity, provide installation space for rotor assembly 20,
Rotor assembly 20 is avoided simultaneously by extraneous pollution.Specifically, by bolt 50 by field frame assembly 10, rotor assembly 20,
First support assembly 30 and second support assembly 40 tighten together；In first support assembly 30 and second support assembly 40 respectively
Equipped with first bearing 32 and second bearing 42 so that shaft 22 rotate it is smooth.
To sum up, hook commutator in the related technology is enameled wire to be wound on the copper hook of commutator, is made on commutator
Copper sheet be connected with winding, so that contact of the electric current by carbon brush with commutator segment be allowed to flow through winding, generate rotor assembly 20
Galvanomagnetic-effect and turning moment；Since the interface line of winding and commutator segment is exposed at outside commutator segment, such as it is greater than using line footpath
Or be equal to 0.5mm (or sectional area be greater than or equal to 0.2mm2) enameled wire when, adjacent two panels commutator segment will occur short circuit, thus
Limitation permanent magnet DC motor cannot meet output torque more than or equal to 0.5Nm and revolving speed more than or equal to 10krpm's simultaneously
Performance requirement, simultaneously because the high rotary speed property of motor, the outer diameter for also limiting commutator cannot be greater than 45mm, thus commutator
The piece number at most can only be 36.And the present invention uses groove type reverser, can reach 28mm to 45mm in the diameter of commutator 24
When just realize 48 commutator segments 244, compared to hook commutator, without too greatly increasing commutator diameter, and due to commutator
24 line embedding groove 2462 maximum can be worked into wide 1/3 of commutator segment, make the line footpath of winding 28 can bigizationner；When each group of winding 28
After being completely wound on rotor core 26, the interface line of winding 28 is directly embedded into every a piece of commutator segment 244 of commutator 24
In line embedding groove 2462, then soldering and sealing connection, commutator segment 244 and winding 28 is connected, so that electric current be allowed to pass through carbon brush and commutator segment 244
Contact and flow through winding, so that rotor assembly 20 is generated galvanomagnetic-effect and turning moment, improve the electrical of permanent magnet DC motor 1
While performance, the commutation spark of permanent magnet DC motor 1 is significantly reduced.
The embodiment of second aspect of the present invention proposes a kind of food processor, comprising: as described in above-mentioned any embodiment
Permanent magnet DC motor 1.
Food processor provided by the invention including permanent magnet DC motor 1 described in any of the above-described embodiment, therefore has
Whole beneficial effects of the permanent magnet DC motor 1, details are not described herein.
In one embodiment of the invention, it is preferable that food processor is at least one of: wall-breaking machine, blender,
Cooking machine, soy bean milk making machine and juice extractor.
In this embodiment, food processor is at least one of: wall-breaking machine, blender, cooking machine, soy bean milk making machine and squeezing
Juice machine, wherein especially wall-breaking machine needs motor to have biggish power, could smash the cell wall of food, become food
Extremely exquisiteness is obtained, but the power of motor will generate biggish spark, cause security risk once increasing；It is provided by the invention
Permanent magnet DC motor 1 is applied in wall-breaking machine, by being arranged between 48 commutator segments 244 and commutator segment 244 on commutator 24
It is provided with insulation division 248, it is ensured that permanent magnet DC motor 1 will not generate larger spark under biggish power, improve use
Safety.
In the present invention, term " multiple " then refers to two or more, unless otherwise restricted clearly.Term " peace
Dress ", " connected ", " connection ", the terms such as " fixation " shall be understood in a broad sense, can also be with for example, " connection " may be a fixed connection
It is to be detachably connected, or be integrally connected；" connected " can be directly connected, can also be indirectly connected through an intermediary.It is right
For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific conditions.
In the description of this specification, the description of term " one embodiment ", " some embodiments ", " specific embodiment " etc.
Mean that particular features, structures, materials, or characteristics described in conjunction with this embodiment or example are contained at least one reality of the invention
It applies in example or example.In the present specification, schematic expression of the above terms are not necessarily referring to identical embodiment or reality
Example.Moreover, description particular features, structures, materials, or characteristics can in any one or more of the embodiments or examples with
Suitable mode combines.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of permanent magnet DC motor is used for food processor characterized by comprising
Field frame assembly；
Rotor assembly comprising shaft, commutator, rotor core and winding, the commutator is set in the shaft, described
Rotor core is fixed in the shaft, and winding slot is provided on the rotor core, and the winding is located in the winding slot,
The interface line of the winding is electrically connected with the commutator；
The commutator includes ontology and at least one commutator segment, and the ontology is cylindrical, and the commutator segment is covered in described
On the outer wall of ontology, multiple commutator segments are uniformly distributed along the circumferential direction of the ontology, height of the commutator segment along the ontology
Direction is spent to extend；
The ratio of the quantity of the winding slot and the quantity of the commutator segment is less than or equal to 1/3.
2. permanent magnet DC motor according to claim 1, which is characterized in that
The commutator is groove type reverser, and the value range of the diameter of the commutator is 28mm to 45mm；And/or
The quantity of the commutator segment is greater than or equal to 36；And/or
The ratio of the quantity of the winding slot and the quantity of the commutator segment is less than or equal to 1/4.
3. permanent magnet DC motor according to claim 2, which is characterized in that
The quantity of the commutator segment is 48.
4. permanent magnet DC motor according to claim 1, which is characterized in that
One end of each commutator segment towards the rotor core has extended radially outward a boss, each boss
On be provided with a line embedding groove, the line embedding groove extends along the length direction of the commutator segment, and the interface line is embedded described
In line embedding groove；
The value range of the ratio between the width of the width of the line embedding groove and the commutator segment is 1/6 to 1/3.
5. permanent magnet DC motor according to claim 1, which is characterized in that
The commutator further includes at least one insulation division, and an insulation division is located between two commutator segments；
The width of the insulation division is greater than or equal to 0.5mm.
6. permanent magnet DC motor according to claim 5, which is characterized in that
The insulation division is insulating trip or insulation tank.
7. permanent magnet DC motor according to any one of claim 1 to 6, which is characterized in that
The ontology is bakelite.
8. permanent magnet DC motor according to any one of claim 1 to 6, which is characterized in that further include:
Carbon brush comprising anode carbon brush and cathode carbon brush, the two are symmetrically distributed in the two sides of the commutator, and the carbon brush is side
Shape strip, the carbon brush are its thickness a along the size of the length direction of the shaft, and the carbon brush is in the anode carbon brush and institute
The size for stating the line direction of cathode carbon brush is its length, another having a size of its width b, the thickness a's and width b of the carbon brush
Ratio a/b is greater than or equal to 1.7.
9. permanent magnet DC motor according to any one of claim 1 to 6, which is characterized in that further include:
First support assembly and second support assembly, the two are respectively sleeved at the both ends of the shaft, the first support assembly,
The second support assembly and the field frame assembly enclose cavity, and the rotor assembly is located in the cavity.
10. a kind of food processor characterized by comprising
Permanent magnet DC motor as claimed in any one of claims 1-9 wherein.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710553181.4A CN109217577B (en) | 2017-07-07 | 2017-07-07 | Permanent magnet direct current motor and food processor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710553181.4A CN109217577B (en) | 2017-07-07 | 2017-07-07 | Permanent magnet direct current motor and food processor |
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| Publication Number | Publication Date |
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| CN109217577A true CN109217577A (en) | 2019-01-15 |
| CN109217577B CN109217577B (en) | 2020-09-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710553181.4A Active CN109217577B (en) | 2017-07-07 | 2017-07-07 | Permanent magnet direct current motor and food processor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110492693A (en) * | 2019-08-05 | 2019-11-22 | 江西森阳科技股份有限公司 | A kind of flat winding wire process equipment of Nd-Fe-B permanent-magnet motor |
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| CN110492693A (en) * | 2019-08-05 | 2019-11-22 | 江西森阳科技股份有限公司 | A kind of flat winding wire process equipment of Nd-Fe-B permanent-magnet motor |
| CN110492693B (en) * | 2019-08-05 | 2024-03-29 | 江西森阳科技股份有限公司 | Flat winding wire processing equipment of neodymium iron boron permanent magnet motor |
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| CN109217577B (en) | 2020-09-04 |
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