WO2019169828A1 - 食品料理机和用于食品料理机的电机 - Google Patents

食品料理机和用于食品料理机的电机 Download PDF

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Publication number
WO2019169828A1
WO2019169828A1 PCT/CN2018/098625 CN2018098625W WO2019169828A1 WO 2019169828 A1 WO2019169828 A1 WO 2019169828A1 CN 2018098625 W CN2018098625 W CN 2018098625W WO 2019169828 A1 WO2019169828 A1 WO 2019169828A1
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WO
WIPO (PCT)
Prior art keywords
stator
motor
food processor
rotor core
food
Prior art date
Application number
PCT/CN2018/098625
Other languages
English (en)
French (fr)
Inventor
梁显堂
陈连城
庞从善
王志锋
肖磊
杨振峰
Original Assignee
广东美的生活电器制造有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN201810187842.0A external-priority patent/CN110247484A/zh
Priority claimed from CN201810187834.6A external-priority patent/CN110247531A/zh
Priority claimed from CN201820316060.8U external-priority patent/CN207939278U/zh
Priority claimed from CN201820315628.4U external-priority patent/CN207939273U/zh
Application filed by 广东美的生活电器制造有限公司 filed Critical 广东美的生活电器制造有限公司
Priority to EP18908712.5A priority Critical patent/EP3731374A4/en
Priority to JP2020540417A priority patent/JP7070975B2/ja
Priority to KR1020207019898A priority patent/KR102434245B1/ko
Priority to US16/968,876 priority patent/US11936259B2/en
Publication of WO2019169828A1 publication Critical patent/WO2019169828A1/zh

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K29/00—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices
    • H02K29/03—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with a magnetic circuit specially adapted for avoiding torque ripples or self-starting problems
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
    • H02K1/185—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures to outer stators
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23N—MACHINES OR APPARATUS FOR TREATING HARVESTED FRUIT, VEGETABLES OR FLOWER BULBS IN BULK, NOT OTHERWISE PROVIDED FOR; PEELING VEGETABLES OR FRUIT IN BULK; APPARATUS FOR PREPARING ANIMAL FEEDING- STUFFS
    • A23N1/00—Machines or apparatus for extracting juice
    • A23N1/02—Machines or apparatus for extracting juice combined with disintegrating or cutting
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J19/00—Household machines for straining foodstuffs; Household implements for mashing or straining foodstuffs
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J43/00—Implements for preparing or holding food, not provided for in other groups of this subclass
    • A47J43/04—Machines for domestic use not covered elsewhere, e.g. for grinding, mixing, stirring, kneading, emulsifying, whipping or beating foodstuffs, e.g. power-driven
    • A47J43/046—Machines for domestic use not covered elsewhere, e.g. for grinding, mixing, stirring, kneading, emulsifying, whipping or beating foodstuffs, e.g. power-driven with tools driven from the bottom side
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J43/00—Implements for preparing or holding food, not provided for in other groups of this subclass
    • A47J43/04—Machines for domestic use not covered elsewhere, e.g. for grinding, mixing, stirring, kneading, emulsifying, whipping or beating foodstuffs, e.g. power-driven
    • A47J43/07—Parts or details, e.g. mixing tools, whipping tools
    • A47J43/0716—Parts or details, e.g. mixing tools, whipping tools for machines with tools driven from the lower side
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J43/00—Implements for preparing or holding food, not provided for in other groups of this subclass
    • A47J43/04—Machines for domestic use not covered elsewhere, e.g. for grinding, mixing, stirring, kneading, emulsifying, whipping or beating foodstuffs, e.g. power-driven
    • A47J43/07—Parts or details, e.g. mixing tools, whipping tools
    • A47J43/08—Driving mechanisms
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J43/00—Implements for preparing or holding food, not provided for in other groups of this subclass
    • A47J43/04—Machines for domestic use not covered elsewhere, e.g. for grinding, mixing, stirring, kneading, emulsifying, whipping or beating foodstuffs, e.g. power-driven
    • A47J43/07—Parts or details, e.g. mixing tools, whipping tools
    • A47J43/08—Driving mechanisms
    • A47J43/085—Driving mechanisms for machines with tools driven from the lower side
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/14—Stator cores with salient poles
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/14—Stator cores with salient poles
    • H02K1/146—Stator cores with salient poles consisting of a generally annular yoke with salient poles
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/27—Rotor cores with permanent magnets
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/27—Rotor cores with permanent magnets
    • H02K1/2706—Inner rotors
    • H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
    • H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
    • H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
    • H02K1/276—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/30—Structural association with control circuits or drive circuits
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
    • H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
    • H02K21/14—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures
    • H02K21/16—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures having annular armature cores with salient poles
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2211/00—Specific aspects not provided for in the other groups of this subclass relating to measuring or protective devices or electric components
    • H02K2211/03—Machines characterised by circuit boards, e.g. pcb
    • 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

Definitions

  • the invention relates to the technical field of food cooking machines, and more particularly to a food cooking machine and a motor for a food cooking machine.
  • the ratio of the rotor diameter to the stator diameter of the motor has no fixed value, and is usually 0.60-0.75. In this range, although the motor can output a large torque, the high-speed performance of the motor is poor, and the teeth of the motor are As the slot torque increases, the motor is prone to vibration and loud noise. If the above problem is solved by adding a weak magnetic effect to the algorithm of the drive control circuit, the energy efficiency of the motor is reduced.
  • the present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a motor for a food processor that effectively solves the problem of low motor output low speed and high speed vibration noise.
  • the invention also proposes a food processor having the above motor.
  • An electric machine for a food processor includes: a stator core including an annular stator yoke portion and a plurality of stator tooth portions provided on an inner circumferential surface of the stator yoke portion, A stator cogging is formed between two adjacent stator teeth, and the plurality of stator teeth define a stator hole coaxial with the stator yoke, and an outer contour of a radial section of the stator yoke a substantially circular shape having a maximum radial dimension D; a rotor core rotatably disposed within the stator bore and coaxial with the stator bore, a maximum radial dimension of the rotor core Is d, wherein D and d satisfy: 0.4 ⁇ d / D ⁇ 0.55.
  • the motor for a food processor effectively solves the problem that the low-speed output force of the motor is small and the high-speed vibration noise is large, and the efficiency and safety performance of the motor are improved.
  • the motor for a food processor may further have the following additional technical features:
  • D and d further satisfy: 0.5 ⁇ d / D ⁇ 0.55.
  • the rotor core is provided with a plurality of magnet slots disposed along the circumferential direction thereof for interposing permanent magnets, and both ends of the magnet slots respectively extend to the rotor iron At both axial ends of the core, each of the magnet slots is provided with a positioning groove for positioning the permanent magnet at at least one end in the circumferential direction of the rotor core.
  • a minimum distance of the magnet slot from an outer circumferential surface of the rotor core is a1
  • the magnet slot is an elongated arcuate groove or a linear groove and a bisector of a length direction of the magnet groove passes through a center of the rotor core.
  • the stator core further includes: a plurality of positioning protrusions, the plurality of positioning protrusions are circumferentially spaced apart from the outer circumference of the stator yoke The positioning projections extend in a radial direction of the stator yoke.
  • the outer peripheral edge of the rotor core is formed with a plurality of pole teeth distributed along the circumferential direction thereof and protruding outward, and a tooth groove is formed between two adjacent pole teeth.
  • the stator yoke has a width W and the width of the stator yoke is equal
  • the width of each of the stator tooth bodies is equal.
  • stator yoke is a circular ring whose inner contour and outer contour are both circular.
  • two ends of the stator toothed shoes respectively extend beyond the stator tooth body, adjacent ends of two adjacent stator teeth Interspersed or connected.
  • the motor is a brushless DC motor with a power P of 500W-2000W.
  • the motor is a variable frequency brushless motor.
  • a food processor includes: a cooking container having a food receiving chamber for containing food therein; a motor for a food processor according to an embodiment of the present invention; for processing food
  • the food processing member extends into the food receiving chamber and is rotated relative to the food container by the motor.
  • the food processing machine further includes: a cooking cup, the cooking container is a cup assembly detachably disposed on the base, the motor is mounted on the base, and the food processing component is The knife assembly to which the cup assembly is coupled, the motor being in driving connection with the knife assembly to drive the knife assembly to rotate relative to the cup assembly when the cup assembly is disposed on the base.
  • a food processor further includes: an electronic control system including an electronic control board mounted to the base and electrically connected to the motor to control the motor Working; a display assembly for displaying an operating state of the food processor, the display assembly being mounted to the base and electrically connected to the electronic control system.
  • the food processor is a blender, a wall breaker, a juice machine, a juicer or a soybean milk machine.
  • FIG. 1 is a schematic view showing the assembly of a stator core and a rotor core of a motor according to an embodiment of the present invention
  • FIG. 2 is a schematic structural view of a rotor core of a motor according to an embodiment of the present invention
  • FIG. 3 is a schematic structural view of a rotor core of a motor according to another embodiment of the present invention.
  • FIG. 4 is a schematic structural view of a food processor according to an embodiment of the present invention.
  • Food processor 200 cooking container 210; base 220; electronic control system 230; display assembly 240;
  • Stator core 10 stator slot 101; stator bore 102; stator yoke 11; stator tooth portion 12; stator tooth body 121; stator tooth shoe 122; positioning projection 13; winding 14;
  • Rotor core 20 pole teeth 21; slots 22; magnet slots 23; positioning slots 24; permanent magnets 25.
  • a motor 100 for a food processor 200 may include a stator core 10 and a rotor core 20.
  • the stator core 10 may include a stator yoke portion 11 and a plurality of stator tooth portions 12, wherein the stator yoke portion 11 is annular, and a plurality of stator tooth portions 12 may be provided on an inner circumferential surface of the annular stator yoke portion 11,
  • the stator yoke 11 can provide mechanical support for the plurality of stator teeth 12 to position the stator teeth 12.
  • the outer contour of the radial cross section of the stator yoke portion 11 may be substantially circular, and the structure of the stator yoke portion 11 is more stable, and at the same time, the connection between the stator yoke portion 11 and the stator tooth portion 12 is facilitated.
  • the plurality of stator tooth portions 12 may be spaced apart in the circumferential direction of the stator yoke portion 11, and the stator tooth grooves 101 may be formed between the adjacent two stator tooth portions 12, and the motor 100 windings may be wound around the stator teeth through the stator slots 101. Department 12.
  • the plurality of stator teeth 12 may define a stator bore 102 that is coaxial with the stator yoke 11 , the rotor core 20 may be disposed within the stator bore 102 , and the rotor core 20 may be coaxial with the stator bore 102 .
  • the rotor core 20 is rotatable about the axis within the stator bore 102, and the rotor core 20 is spaced apart from the inner peripheral surface of the stator bore 102 by a predetermined distance to make the rotor core 20 rotate more smoothly.
  • the plurality of stator teeth 12 form a plurality of pairs of magnetic poles, and a magnetic field is generated in the stator hole 102.
  • the rotor core 20 located in the stator hole 102 can be wound around the axis by the magnetic field. Rotate to achieve the conversion and output of electrical energy.
  • stator teeth 12 can be flexibly set according to actual conditions, and the stator teeth 12 in FIG. 1 are six for the purpose of illustration only, in other embodiments of the present invention.
  • the stator teeth 12 may also be two, four or more, which are all within the scope of the present invention.
  • the ratio of the rotor diameter to the stator diameter of the motor has no fixed value, and is usually 0.60-0.75. In this range, although the motor can output a large torque, the high-speed performance of the motor is poor, and the teeth of the motor are As the slot torque increases, the motor is prone to vibration and loud noise. If the above problem is solved by adding a weak magnetic effect to the algorithm of the drive control circuit, the energy efficiency of the motor is lowered.
  • the maximum radial dimension D of the stator yoke 11 and the maximum radial dimension d of the rotor core 20 satisfy 0.4 ⁇ d / D ⁇ 0.55.
  • the ratio d/D of the maximum radial dimension D of the stator yoke 11 to the maximum radial dimension d of the rotor core 20 may be 0.45, 0.48, 0.51, and 0.54, respectively.
  • the stator core 10 of the equal shape that is, the maximum radial dimension D of the stator yoke portion 11 is constant
  • the maximum radial dimension d of the rotor core 20 is too small, if the motor 100 has a low speed.
  • the rotation speed of the motor 100 is less than 5000 rpm
  • the load capacity of the rotor core 20 is too small, and under the condition of driving the same load, the rotor core 20 whose outer diameter d is too small may be severely heated, affecting the normality of the motor 100. Operation, reducing the efficiency of the motor 100, and even damage may occur.
  • the maximum radial dimension D of the stator yoke 11 and the maximum radial dimension d of the rotor core 20 satisfy 0.4 ⁇ d / D ⁇ 0.55, which can improve the output force of the rotor core 20 of the motor 100, and the motor 100 is more efficient.
  • the rotor core 20 is prevented from generating heat and is safer, and the maximum radial dimension d of the rotor core 20 can be made small to eliminate the inertia generated by the rotor core 20 during high-speed rotation, and the motor 100 is prevented from generating large vibration noise.
  • the outer contours of the stator core 10 and the rotor core 20 are circular, and the maximum radial dimension specifies the circular shape of the sub-core 10 and the rotor core 20.
  • the diameter of the outer contour In still other embodiments of the present invention, the outer contours of the stator core 10 and the rotor core 20 are not circular, and the maximum radial dimension can be understood as the over-axis of the outer contours of the stator core 10 and the rotor core 20.
  • the size of the radial position is the largest position.
  • the maximum radial dimension D of the stator yoke portion 11 of the motor 100 for the food processor 200 according to the embodiment of the present invention and the maximum radial dimension d of the rotor core 20 satisfy 0.4 ⁇ d / D ⁇ 0.55, effectively solving the motor
  • the low speed output of 100 and the high speed vibration noise increase the efficiency and safety of the motor 100.
  • the maximum radial dimension D of the stator yoke 11 and the maximum radial dimension d of the rotor core 20 may further satisfy: 0.5 ⁇ d / D ⁇ 0.55.
  • a plurality of magnet slots 23 may be disposed in the rotor core 20, and the plurality of magnet slots 23 may be spaced apart along the circumferential direction of the rotor core 20, and Both ends of the magnet groove 23 may extend to the axial ends of the rotor core 20, respectively, and the plurality of permanent magnets 25 may be inserted into the plurality of magnet slots 23 in one-to-one correspondence.
  • the permanent magnet 25 can extend to both axial ends of the rotor core 20 in the magnet groove 23, and the position of the permanent magnet 25 is fixed and reliable, and the permanent magnet 25 can be effectively prevented from coming loose.
  • the plurality of permanent magnets 25 can form a plurality of pairs of magnetic poles to generate a magnetic field, thereby generating an induced electromotive force to realize conversion of electric energy.
  • the rotor core 20 using the permanent magnet 25 does not need to be provided with an exciting coil, which is advantageous for reducing the weight of the motor 100, reducing the volume of the motor 100, and eliminating the need to start excitation at the time of starting, which is quicker and more energy efficient.
  • the number of the magnet slots 23 and the permanent magnets 25 is not particularly limited, and only a plurality of permanent magnets 25 are required to be inserted into the plurality of magnet slots 23 one by one to realize the fixing of the permanent magnets 25. And the requirements of forming a plurality of magnetic poles can be.
  • the magnet slots 23 and the permanent magnets 25 are respectively four, and the four permanent magnets 25 are respectively inserted in the four magnet slots 23.
  • the magnet slots 23 and the permanent magnets 25 may also be two, six, eight or more, respectively, which are all within the scope of the present invention.
  • each of the magnet slots 23 may be provided with a positioning groove 24 at least at one end in the circumferential direction of the rotor core 20, and the permanent magnet 25 may be inserted into the positioning groove 24 while being inserted into the magnet groove 23, and the positioning groove 24 may further define the permanent magnet 25 The position of the permanent magnet 25 is fixed more accurately and firmly.
  • the linear distance of each of the magnet grooves 23 at both ends in the circumferential direction of the rotor core 20 is b, and the center of the rotor core 20 is the largest path from the outer peripheral surface of the rotor core 20.
  • b: R 0.95
  • the length of the permanent magnet 25 in the magnet slot 23 is too short, reducing the utilization of the rotor core 20, thereby reducing the energy efficiency of the motor 100; when b: R > 1, the rotor iron is increased.
  • the magnetic flux leakage of the core 20 also reduces the energy efficiency of the motor 100.
  • b:R 0.95-1.0
  • b:R may be 0.95, 0.96, 0.97, 0.98, 0.99, and 1.0, respectively. , effectively ensure the energy efficiency of the motor 100.
  • the minimum distance between the magnet groove 23 and the outer circumferential surface of the rotor core 20 is a1, and the minimum distance between the stator groove 24 and the outer circumferential surface of the rotor core 20 is a2.
  • the minimum distance between the permanent magnet 25 and the outer circumferential surface of the rotor core 20 can be understood as the value of the smaller one of a1 and a2, that is, min(a1, a2).
  • min(a1, a2) is too small, the mechanical strength of the rotor core 20 is lowered, thereby reducing the reliability of the rotor core 20; and when min(a1, a2) is too large, the leakage of the rotor core 20 is increased. Magnetic, which in turn reduces the energy efficiency of the motor 100.
  • min(a1, a2) 0.8 mm - 1.8 mm while ensuring the mechanical strength and energy efficiency of the rotor core 20.
  • min(a1, a2) may be 0.8 mm, 1.0 mm, 1.2 mm, 1.4 mm, 1.6 mm, and 1.8 mm, respectively.
  • the shape of the magnet groove 23 is not particularly limited in the present invention, and it is only required to satisfy the requirement that the bisector of the longitudinal direction of the magnet groove 23 passes through the center of the rotor core 20, and the magnetic field generated by the permanent magnet 25 in the magnet groove 23 is obtained.
  • the distribution is more uniform.
  • the magnet groove 23 is an elongated linear groove extending in the chord direction of the rotor core 20, and the distance b between both ends of the linear groove is the extension length of the linear groove.
  • the magnet groove 23 is an elongated arcuate groove extending in the circumferential direction of the rotor core 20, and the distance b between the both ends of the arcuate groove is the chord of the curved groove. long.
  • the stator core 10 may further include a plurality of positioning protrusions 13 which may be opened in the circumferential direction of the stator yoke portion 11 to the stator yoke portion 11
  • the outer peripheral surface, and each of the positioning projections 13 may extend in the radial direction of the stator yoke portion 11. Therefore, when the motor 100 is assembled, the stator core 10 can be positioned with the bracket of the motor 100 through the positioning protrusions 13, so that the assembly of the motor 100 is simpler and more convenient and accurate.
  • the present invention does not particularly limit the number and position of the positioning protrusions 13.
  • the number of the positioning protrusions 13 is equal to the number of the stator teeth 12.
  • the positioning projections 13 are disposed in one-to-one correspondence with the positions of the stator teeth 12 on the outer circumferential surface of the stator yoke portion 11, facilitating the mold design and molding of the stator core 10.
  • the number and position of the positioning protrusions 13 may not be in one-to-one correspondence with the stator teeth 12, and only the positioning protrusions 13 are required to be spaced apart from the outer peripheral surface of the stator yoke 11. The requirement for positioning the stator core 10 can be achieved.
  • each stator slot 101 may be in communication with the stator bore 102, respectively, such that the winding 14 of the stator core 10 is open from the stator slot 101 to the stator bore 102. Winding is easy and fast.
  • the outer peripheral edge of the rotor core 20 may be formed with a plurality of pole teeth 21, which may be distributed along the circumferential direction of the rotor core 20 and Protruding outwardly, a tooth groove 22 is formed between adjacent two pole teeth 21, and in the embodiment having a plurality of magnet slots 23, the magnet groove 23 and the pole teeth 21 can be disposed in one-to-one correspondence.
  • the rotor core 20 is formed as a salient pole structure rotor, and the salient pole structure rotor can prevent leakage magnetic flux and cogging effect between the rotor poles, thereby improving the rotor core, compared with the full-circular rotor in the related art. 20 efficiency.
  • the maximum outer diameter dimension d of the rotor core 20 refers to the two pole teeth 21 of the addendum that are connected to the axis of the rotor core 20.
  • the connection size of the crest is the connection size of the crest.
  • the normal tooth profile of the pole tooth 21 may be formed in a circular arc shape, and the outer peripheral edge of the axial section of the rotor core 20 may be sequentially connected by a plurality of arc shapes.
  • a tooth groove 22 is formed in the adjacent two arc-shaped joints.
  • the radius of the circle whose groove bottom is tangent and centered on the center of the rotor core 20 is r. If r: R ⁇ 0.96, the extension length of the pole teeth 21 in the circumferential direction of the rotor core 20 is too short, which reduces the performance of the motor 100; if r: R > 0.98, the slot 22 is too small, in the motor When 100 is running, it can't effectively reduce the noise interference caused by the corresponding cogging.
  • r: R 0.96-0.98
  • r:R may be 0.96, 0.97, and 0.98, respectively, to effectively reduce cogging At the same time, the efficiency of the motor 100 is ensured.
  • the ratio of the yoke width to the tooth width of the motor stator has no fixed value, and the ratio is usually 0.4-0.6, so that the stator yoke portion bears a larger proportion of iron loss to reduce the heat of the stator tooth portion.
  • the temperature rises but it brings about the problem that the temperature rise of the stator yoke is too high. If the above problem is solved by adding a magnetically permeable outer casing to the motor, the magnetic flux density of the stator yoke portion can be reduced to a certain extent, and the iron loss of the stator yoke portion can be reduced, but the material and process cost are increased.
  • each of the stator teeth 12 may include a stator tooth main body 121 and a stator tooth shoe 122.
  • the stator tooth body 121 is connected to the stator yoke 11 so that the stator tooth portion 12 and the stator yoke portion 11 can be integrally connected.
  • the stator toothed shoe 122 is disposed at the inner end of the stator tooth main body 121.
  • the air gap reluctance between the stator tooth portion 12 and the rotor core 20 can be reduced to improve the magnetic field distribution, and on the other hand, the stator teeth can be wound around the stator teeth.
  • the winding 14 on the portion 12 is fixed to prevent the winding 14 from being loosened by the inner end of the stator tooth portion 12, and the winding 14 is more securely fixed.
  • the widths of the stator yoke portions 11 are equal to each other to facilitate the molding of the stator core 10.
  • the width of the stator yoke 11 may be W, and the width of each of the stator tooth main bodies 121 may be V.
  • W the maximum radial dimension D of the stator core 10 is constant
  • W: V the magnetic flux density of the stator tooth portion 12 is too high, and even the magnetic flux density is saturated.
  • the stator slots 101 between the adjacent two stator tooth portions 12 are too small, and the distance between the adjacent two stator tooth portions 12 is too short, which easily forms an electromagnetic circuit, thereby reducing the energy efficiency of the motor 100.
  • the magnetic flux density of the stator core 10 is reasonably distributed to make the temperature rise of the motor 100 more balanced to improve the service life and safety performance of the motor 100.
  • the ratio W:V of the width W of the stator yoke 11 to the width V of the stator tooth body 121 may be 0.6, 0.63, 0.65, 0.68, and 0.7, respectively.
  • the width W of the stator yoke portion 11 can be understood as the distance between the inner circumferential surface and the outer circumferential surface of the annular stator yoke portion 11, and the width V of the stator tooth portion main body 121 can be understood as a stator. The distance between the two side faces of the tooth main body 121 in the circumferential direction of the stator yoke portion 11.
  • the distance between the inner circumferential surface and the outer circumferential surface of the annular stator yoke portion 11 may be the same everywhere.
  • the distance between the inner circumferential surface and the outer circumferential surface of the annular stator yoke portion 11 may not be completely the same.
  • the distance between the inner circumferential surface and the outer circumferential surface of the annular stator yoke portion 11 may or may not be the same everywhere.
  • the width of each of the stator tooth main bodies 121 may be equal everywhere to facilitate the mold design of the stator core 10 forming process, and the process is simpler.
  • the stator yoke portion 11 may have a circular shape in which the inner contour and the outer contour are both circular, and the stator yoke portion 11 has a simple structure and is convenient for molding.
  • each of the stator tooth main bodies 121 may pass through the center of the stator hole 102, that is, each stator tooth main body 121 extends in the radial direction of the stator hole 102, which is advantageous in making the magnetic field distribution more symmetrical and uniform.
  • both ends of the stator toothed shoe 122 may extend beyond the stator tooth main body 121, and adjacent ends of the adjacent two stator toothed shoes 122 are spaced apart or Connected.
  • the winding 14 wound around the stator tooth portion 12 can be fixed to prevent the winding 14 from being loosened by the inner end of the stator tooth portion 12, and the winding 14 is more reliably fixed.
  • the motor 100 can be a brushless DC motor with a power P of 500W-2000W.
  • the brushless DC motor does not need a carbon brush for commutation, so there is no carbon brush wear, and the motor 100 has lower noise. And the life of the motor 100 is longer.
  • the motor 100 for the food processor 200 may be a variable frequency brushless motor. According to different types of foods to be processed by the food processor 200, the variable frequency brushless motor can provide different speeds, torques, time, and the like.
  • the food processor 200 having the motor 100 is intelligentized.
  • the variable frequency brushless motor does not need to be commutated by a structure such as a carbon brush, and there is no wear of the carbon brush, and the running noise is lower, which is beneficial to improving the service life of the food processor 200 and improving the user experience.
  • the food processor 200 may include a food container 210, a food processing member, and a motor 100 for the food processor 200 according to an embodiment of the present invention.
  • the food container 210 may be formed with a food receiving chamber for holding the food, the food processing member may be drivingly coupled to the motor 100, and the food processing member may protrude into the food receiving chamber. Thereby, the food processing member can be rotated relative to the vessel container 210 by the motor 100, so that the food in the food accommodating chamber can be processed.
  • the food processor 200 for the food processor 200 according to the embodiment of the present invention effectively solves the problem that the low speed output of the motor 100 is small and the high-speed vibration noise is large. The problem is to improve the efficiency and safety performance of the motor 100.
  • the food processor 200 may further include a base 220.
  • the cooking container 210 may be a cup assembly, and the cup assembly is detachably disposed on the base 220 to facilitate food handling and cleaning of the cup assembly.
  • the motor 100 can be mounted to the base 220.
  • the food processing component can be a knife assembly connected to the cup assembly. When the cup assembly is disposed on the base 220, the motor 100 can be drivingly coupled to the knife assembly, whereby the motor 100 can be driven. The knife assembly is rotated relative to the cup assembly to allow the knife assembly to cut food and the like.
  • the food processor 200 can further include an electronic control system 230 and a display assembly 240.
  • the electronic control system 230 includes an electric control board.
  • the electric control board can be mounted on the base 220, and the electric control board can be electrically connected to the motor 100 to control the operation of the motor 100.
  • the display assembly 240 can also be mounted to the base 220, and the display assembly 240 can be electrically coupled to the electronic control system 230 such that the display assembly 240 can be used to display the operational status of the food processor 200.
  • the display component 240 can have an operation button, and the user can control the electronic control system 230 by operating the button, thereby controlling the working mode and state of the food processor 200, and the use is more convenient.
  • the food processor 200 may be a blender, a wall breaker, a juice machine, a juicer or a soybean milk machine or the like.
  • the mixer has a high rotation speed, and the food can be mixed more evenly by high-speed agitation; the high speed of the broken machine can be used to treat hard foods, and can fully enrich the food with a large amount of phytochemicals present in the peel, the core and the rhizome.
  • the broken wall is released; the speed of the juice machine is low, and the food is processed by push-type extrusion and low-flex extraction; the speed of the juicer is higher, and more kinds of food can be pulverized and mixed; the soymilk machine has a higher rotation speed. Realize the functions of preheating, beating, boiling and delaying the cooking process.
  • the motor 100 according to an embodiment of the present invention can be applied to a wider variety of food processor 200, which meets more use requirements and is more practical.
  • connection In the description of the present invention, it should be noted that the terms “installation”, “connected”, and “connected” are to be understood broadly, and may be fixed or detachable, for example, unless otherwise explicitly defined and defined. Connected, or integrally connected; can be mechanical or electrical; can be directly connected, or indirectly connected through an intermediate medium, can be the internal communication of the two components.
  • Connected, or integrally connected can be mechanical or electrical; can be directly connected, or indirectly connected through an intermediate medium, can be the internal communication of the two components.
  • the specific meaning of the above terms in the present invention can be understood in a specific case by those skilled in the art.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Food Science & Technology (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Polymers & Plastics (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
  • Food-Manufacturing Devices (AREA)

Abstract

一种食品料理机(200)和用于食品料理机(200)的电机(100)，电机(100)包括：定子铁芯(10)，定子铁芯(10)包括环形的定子轭部(11)和设于定子轭部(11)的内周面的多个定子齿部(12)，相邻两个定子齿部(12)之间形成有定子齿槽(101)，多个定子齿部(12)限定出与定子轭部(11)同轴的定子孔(102)，定子轭部(11)的径向截面的外轮廓大体为圆形且最大径向尺寸为D；转子铁芯(20)，转子铁芯(20)可转动地设在定子孔(102)内且与定子孔(102)同轴，转子铁芯(20)的最大径向尺寸为d，其中，D和d满足：0.4≤d/D≤0.55。

Description

食品料理机和用于食品料理机的电机
相关申请的交叉引用
本公开要求广东美的生活电器制造有限公司于2018年03月07日提交的、中国专利申请号为“201820316060.8”、“201810187842.0”、“201820315628.4”和“201810187834.6”的优先权。
技术领域
本发明涉及食品料理机技术领域，更具体地，涉及一种食品料理机和用于食品料理机的电机。
背景技术
在相关技术中，电机的高速性能较差，且容易产生振动。
发明内容
本申请是基于发明人对以下事实和问题的发现和认识作出的：
在相关技术中，电机的转子直径与定子直径比值没有固定值，通常多为0.60-0.75，在此范围内，电机虽然可以输出较大的扭矩，但是电机的高速性能较差，并且电机的齿槽转矩增大，电机容易产生振动和较大的噪音。若通过在驱动控制电路的算法中增加弱磁效果来解决上述问题，则会降低电机的能效。
本发明旨在至少解决现有技术中存在的技术问题之一。为此，本发明提出一种用于食品料理机的电机，所述用于食品料理机的电机有效解决了电机的低速输出力小和高速振动噪音大的问题。
本发明还提出了一种具有上述电机的食品料理机。
根据本发明实施例的用于食品料理机的电机，包括：定子铁芯，所述定子铁芯包括环形的定子轭部和设于所述定子轭部的内周面的多个定子齿部，相邻两个所述定子齿部之间形成有定子齿槽，多个所述定子齿部限定出与所述定子轭部同轴的定子孔，所述定子轭部的径向截面的外轮廓大体为圆形且最大径向尺寸为D；转子铁芯，所述转子铁芯可转动地设在所述定子孔内且与所述定子孔同轴，所述转子铁芯的最大径向尺寸为d，其中，D和d满足：0.4≤d/D≤0.55。
根据本发明实施例的用于食品料理机的电机有效解决了电机的低速输出力小和高速振动噪音大的问题，提高了电机的效率和安全性能。
另外，根据本发明上述实施例的用于食品料理机的电机还可以具有如下附加的技术特征：
根据本发明实施例的用于食品料理机的电机，D和d进一步满足：0.5≤d/D≤0.55。
根据本发明的一些实施例，所述转子铁芯内设有沿其周向间隔开设置且用于插设永磁体的多个磁体槽，所述磁体槽的两端分别延伸至所述转子铁芯的轴向两端，每个所述磁体槽在所述转子铁芯的周向上的至少一端设有用于对所述永磁体进行定位的定位槽。
进一步地，每个所述磁体槽在所述转子铁芯的周向上的两端的直线距离为b，所述转子铁芯的中心距离所述转子铁芯的外周面的最大径向距离为R，其中，b:R＝0.95-1.0。
进一步地，所述磁体槽距离所述转子铁芯的外周面的最小距离为a1，所述定位槽距离所述转子铁芯的外周面的最小距离为a2，其中，min(a1，a2)＝0.8mm-1.8mm。
根据本发明的一些实施例，所述磁体槽为长条形的弧形槽或直线槽且所述磁体槽的长度方向的平分线经过所述转子铁芯的中心。
在本发明的一些实施例中，所述定子铁芯还包括：多个定位凸起，多个定位凸起沿所述定子轭部的周向间隔开设于所述定子轭部的外周面，每个所述定位凸起沿所述定子轭部的径向延伸。
根据本发明的一些实施例，所述转子铁芯的外周沿形成有多个沿其周向分布且向外凸出的极齿，相邻两个所述极齿之间形成有齿槽。
进一步地，所述极齿的法向齿廓形成为圆弧形，以所述转子铁芯的中心为圆心且与所述极齿的齿顶相切的圆的半径为R，与所述齿槽的槽底相切且以所述转子铁芯的中心为圆心的圆的半径为r，其中，r:R＝0.96-0.98。
在本发明的一些实施例中，所述定子轭部的宽度为W且所述定子轭部的宽度处处相等，每个所述定子齿部包括与所述定子轭部相连的定子齿部主体和设在所述定子齿部主体的内端的定子齿靴，每个所述定子齿部主体的宽度为V，其中，W：V＝0.6-0.7。
进一步地，W和V进一步满足：W：V＝0.64-0.66。
根据本发明的一些实施例，每个所述定子齿部主体的宽度处处相等。
进一步地，所述定子轭部为内轮廓和外轮廓均为圆形的圆环形。
在本发明的一些实施例中，在所述定子轭部的周向上，所述定子齿靴的两端分别延伸超出所述定子齿部主体，相邻两个所述定子齿靴的相邻端间隔开或相连。
根据本发明的一些实施例，所述电机为无刷直流电机，功率P为500W-2000W。
根据本发明的一些实施例，所述电机为变频无刷电机。
根据本发明实施例的食品料理机包括：料理容器，所述料理容器内形成有用于盛放食物的食物容纳腔；根据本发明实施例的用于食品料理机的电机；用于对食物进行处理的食品处 理件，所述食品处理件伸入所述食物容纳腔内且在所述电机的带动下相对于所述料理容器转动。
进一步地，所述食品料理机还包括：机座，所述料理容器为可拆卸地设于所述机座的杯体组件，所述电机安装于所述机座，所述食品处理件为与所述杯体组件相连的刀组件，所述电机在所述杯体组件设于所述机座时与所述刀组件传动连接以驱动所述刀组件相对于所述杯体组件转动。
根据本发明进一步实施例的食品料理机还包括：电控***，所述电控***包括电控板，所述电控板安装于所述机座且与所述电机电连接以控制所述电机工作；用于显示所述食品料理机的工作状态的显示组件，所述显示组件安装于所述机座且与所述电控***电连接。
可选地，所述食品料理机为搅拌机、破壁机、原汁机、榨汁机或豆浆机。
本发明的附加方面和优点将在下面的描述中部分给出，部分将从下面的描述中变得明显，或通过本发明的实践了解到。
附图说明
本发明的上述和/或附加的方面和优点从结合下面附图对实施例的描述中将变得明显和容易理解，其中：
图1是根据本发明一个实施例的电机的定子铁芯和转子铁芯的装配示意图；
图2是根据本发明一个实施例的电机的转子铁芯的结构示意图；
图3是根据本发明另一个实施例的电机的转子铁芯的结构示意图；
图4是根据本发明实施例的食品料理机的结构示意图。
附图标记：
食品料理机200；料理容器210；机座220；电控***230；显示组件240；
电机100；
定子铁芯10；定子齿槽101；定子孔102；定子轭部11；定子齿部12；定子齿部主体121；定子齿靴122；定位凸起13；绕组14；
转子铁芯20；极齿21；齿槽22；磁体槽23；定位槽24；永磁体25。
具体实施方式
下面详细描述本发明的实施例，所述实施例的示例在附图中示出。下面通过参考附图描述的实施例是示例性的，旨在用于解释本发明，而不能理解为对本发明的限制，本领域的普通技术人员在不脱离本发明的原理和宗旨的情况下可以对这些实施例进行多种变化、修改、替换和变型，本发明的范围由权利要求及其等同物限定。
在本发明的描述中，需要理解的是，术语“中心”、“长度”、“宽度”、“厚度”、“上”、“下”、“前”、“后”、“左”、“右”、“内”、“外”、“轴向”、“径向”、“周向”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本发明和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本发明的限制。此外，在本发明的描述中，除非另有说明，“多个”的含义是两个或两个以上。
下面参考附图描述根据本发明实施例的用于食品料理机200的电机100。
参照图1-图4所示，根据本发明实施例的用于食品料理机200的电机100可以包括：定子铁芯10和转子铁芯20。
具体而言，定子铁芯10可以包括定子轭部11和多个定子齿部12，其中定子轭部11为环形，多个定子齿部12可以设于环形的定子轭部11的内周面，定子轭部11可以为多个定子齿部12提供机械支撑，使定子齿部12位置固定。并且定子轭部11的径向截面的外轮廓可以大体为圆形，定子轭部11结构更加稳定，同时便于定子轭部11与定子齿部12的连接固定。多个定子齿部12可以沿定子轭部11的周向间隔开分布，相邻两个定子齿部12之间可以形成有定子齿槽101，电机100绕组可以经过定子齿槽101缠绕在定子齿部12。
此外，多个定子齿部12可以限定出与定子轭部11同轴的定子孔102，转子铁芯20可以设在定子孔102内，并且转子铁芯20可以与定子孔102同轴。转子铁芯20在定子孔102内可以绕轴线转动，并且转子铁芯20的与定子孔102的内周面之间可以间隔开预定距离，以使转子铁芯20转动更加顺畅。
由此，电机100的绕组14流通电流后，会使多个定子齿部12形成多对磁极，定子孔102内产生磁场，位于定子孔102内的转子铁芯20在磁场的作用下可以绕轴线转动，以实现电能的转换和输出。
需要说明的是，在本发明中，定子齿部12的数量可以根据实际情况需要灵活设置，图1中定子齿部12为六个仅用于示例说明的目的，在本发明的另一些实施例中，定子齿部12也可以为两个、四个或者更多个，这都在本发明的保护范围之内。
在相关技术中，电机的转子直径与定子直径比值没有固定值，通常多为0.60-0.75，在此范围内，电机虽然可以输出较大的扭矩，但是电机的高速性能较差，并且电机的齿槽转矩增大，电机容易产生振动和较大的噪音。如果通过在驱动控制电路的算法中增加弱磁效果来解决上述问题，则会降低电机的能效。
而在本发明中，定子轭部11的最大径向尺寸D与转子铁芯20的最大径向尺寸d满足0.4≤d/D≤0.55。例如，在本发明的一些具体实施例中，定子轭部11的最大径向尺寸D与转子铁芯20的最大径向尺寸d的比值d/D可以分别为0.45、0.48、0.51和0.54等。
对于等外形的定子铁芯10，即定子轭部11的最大径向尺寸D一定的情况下，当d/D＜0.4时，转子铁芯20的最大径向尺寸d过小，如果电机100低速运行，例如，电机100的转速＜5000rpm，转子铁芯20的负载能力过小，带动同等负载的工况下，最大径向尺寸d过小的转子铁芯20会严重发热，影响电机100的正常运行，降低电机100效率，甚至可能发生损坏。
定子轭部11的最大径向尺寸D一定的情况下，当d/D＞0.55时，会导致电机100的齿槽转矩变大，转子铁芯20的转动惯量变大，如果电机100高速运行，例如，电机100的转速＞10000rpm时，电机100会产生振动，进而产生较大的噪音，影响电机100性能和用户的使用感受。
因此，定子轭部11的最大径向尺寸D与转子铁芯20的最大径向尺寸d满足0.4≤d/D≤0.55，可以提高电机100的转子铁芯20的输出力，电机100效率更高，防止转子铁芯20发热，更加安全，并且可以将转子铁芯20的最大径向尺寸d做小，以消除高速转动时转子铁芯20产生的惯量，防止电机100产生较大的振动噪音。
另外，需要说明的是，在本发明的一些实施例中，定子铁芯10和转子铁芯20的外轮廓为圆形，则最大径向尺寸指定子铁芯10和转子铁芯20的圆形外轮廓的直径。而在本发明的另一些实施例中，定子铁芯10和转子铁芯20的外轮廓不是圆形，则最大径向尺寸可以理解为定子铁芯10和转子铁芯20的外轮廓的过轴线的径向尺寸最大的位置的尺寸。
根据本发明实施例的用于食品料理机200的电机100的定子轭部11的最大径向尺寸D与转子铁芯20的最大径向尺寸d满足0.4≤d/D≤0.55，有效解决了电机100的低速输出力小和高速振动噪音大的问题，提高了电机100的效率和安全性能。
为进一步提高电机100的低速输出力和降低电机100的高速噪音，根据本发明进一步的实施例，定子轭部11的最大径向尺寸D与转子铁芯20的最大径向尺寸d可以进一步满足：0.5≤d/D≤0.55。
根据本发明的一些实施例，如图1-图3所示，转子铁芯20内可以设有多个磁体槽23，多个磁体槽23可以沿转子铁芯20的周向间隔开设置，并且磁体槽23的两端可以分别延伸至转子铁芯20的轴向两端，多个永磁体25可以一一对应地插设在多个磁体槽23内。
由此，永磁体25在磁体槽23内可以延伸至转子铁芯20的轴向两端，永磁体25的位置固定牢固可靠，可以有效防止永磁体25松脱。并且多个永磁体25可以形成多对磁极，以产生磁场，进而产生感应电动势，实现电能的转换。采用永磁体25的转子铁芯20无需设置励磁线圈，既有利于减轻电机100的重量，缩小电机100的体积，而且在启动时无需启动励磁，启动更加快捷，更加节能。
需要说明的是，本发明对磁体槽23和永磁体25的数量不做特殊限制，只需要满足多个 永磁体25一一对应地插设在多个磁体槽23内以实现永磁体25的固定并形成多个磁极的要求即可。例如，在如图2和图3所示的具体实施例中，磁体槽23和永磁体25分别为四个，四个永磁体25分别插设在四个磁体槽23内。再例如，在本发明的另一些实施例中，磁体槽23和永磁体25也可以分别为两个、六个、八个或者更多个，这都在本发明的保护范围之内。
此外，每个磁体槽23在转子铁芯20的周向上的至少一端可以设有定位槽24，永磁体25在***磁体槽23的同时可以***定位槽24，定位槽24可以进一步限定永磁体25的位置，使永磁体25位置固定更加准确牢固。
进一步地，如图2和图3所示，每个磁体槽23在转子铁芯20的周向上的两端的直线距离为b，转子铁芯20的中心距离转子铁芯20的外周面的最大径向距离为R，并且b和R满足b:R＝0.95-1.0。
当b:R＜0.95时，磁体槽23内永磁体25的长度过短，降低转子铁芯20的利用率，从而降低了电机100的能效；当b:R＞1时，会增大转子铁芯20的漏磁，也会降低电机100的能效。因此，在本发明的一些实施例中，b:R＝0.95-1.0时，例如，在本发明的一些具体实施例中，b:R可以分别为0.95、0.96、0.97、0.98、0.99和1.0等，有效保证了电机100的能效。
根据本发明的一些实施例，如图2和图3所示，磁体槽23与转子铁芯20的外周面的最小距离为a1，定子槽24与转子铁芯20的外周面的最小距离为a2，永磁体25与转子铁芯20的外周面的最小距离可以理解为a1和a2中的较小的一个的值，即min(a1，a2)。min(a1，a2)过小时，会使转子铁芯20的机械强度降低，从而降低了转子铁芯20的可靠性；而min(a1，a2)过大时，会增加转子铁芯20的漏磁，进而降低了电机100的能效。
因此，在本发明的一些实施例中，min(a1，a2)＝0.8mm-1.8mm，同时保证了转子铁芯20的机械强度和能效。例如，在本发明的一些具体实施例中，min(a1，a2)可以分别为0.8mm、1.0mm、1.2mm、1.4mm、1.6mm和1.8mm等。
另外，本发明对磁体槽23的形状不做特殊限制，只需要满足磁体槽23的长度方向的平分线经过转子铁芯20的中心的要求即可，使磁体槽23内永磁体25产生的磁场分布更加均匀。例如，在如图2所示的示例中，磁体槽23为长条形的直线槽，直线槽沿转子铁芯20的弦线方向延伸，直线槽的两端的距离b即为直线槽的延伸长度。在如图3所示的示例中，磁体槽23为长条形的弧形槽，弧形槽沿转子铁芯20的周向延伸，弧形槽的两端的距离b即为弧形槽的弦长。
在本发明的一些实施中，如图1所示，定子铁芯10还可以包括多个定位凸起13，多个定位凸起13可以沿定子轭部11的周向间隔开设于定子轭部11的外周面，并且每个定位凸起13可以沿定子轭部11的径向延伸。由此，在电机100进行装配时，定子铁芯10可以通 过定位凸起13与电机100的支架进行定位，使电机100装配更加简单方便且定位准确。
需要说明的是，本发明对定位凸起13的数量和设置位置不做特殊限制，例如，在如图1所示的具体实施例中，定位凸起13的数量与定子齿部12的数量相等，并且定位凸起13与定子齿部12位置一一对应的设置在定子轭部11的外周面，便于定子铁芯10的模具设计和成型。在本发明的一些未示出的实施例中，定位凸起13的数量和位置也可以与定子齿部12不一一对应，只需要满足定位凸起13间隔开设于定子轭部11的外周面以实现对定子铁芯10定位的要求即可。
根据本发明的一些实施例，如图1所示，每个定子齿槽101可以分别与定子孔102连通，以便于定子铁芯10的绕组14由定子齿槽101的与定子孔102连通的开口进行绕线，绕线方便快捷。
在本发明的一些实施例中，如图2和图3所示，转子铁芯20的外周沿可以形成有多个极齿21，多个极齿21可以沿转子铁芯20的周向分布且向外凸出，相邻两个极齿21之间形成有齿槽22，并且，在具有多个磁体槽23的实施例中，磁体槽23与极齿21可以一一对应的设置。此时，转子铁芯20形成为凸极结构转子，与相关技术中的全圆状的转子相比，凸极结构转子可以防止转子极间的漏磁以及齿槽效应，从而提高了转子铁芯20的效率。
另外，需要说明的是，对于具有多个极齿21的转子铁芯20，转子铁芯20的最大外径尺寸d是指齿顶的连线过转子铁芯20的轴线的两个极齿21的齿顶的连线尺寸。
进一步地，继续参照图2和图3所示，极齿21的法向齿廓可以形成为圆弧形，转子铁芯20的轴截面的外周沿可以由多个圆弧形依次相连形成，相邻两个圆弧形的连接处形成有齿槽22。
此外，如图2和图3所示，以转子铁芯20的中心为圆心且与极齿21的齿顶相切的圆的半径为R(此时，R＝0.5d)，与齿槽22的槽底相切且以转子铁芯20的中心为圆心的圆的半径为r。若r:R＜0.96，会导致极齿21的沿转子铁芯20的周向的延伸长度过短，降低电机100的性能；若r:R＞0.98，会导致齿槽22过小，在电机100运行时，不能有效降低齿槽相应而产生的噪音干扰。因此，在本发明的一些实施例中，r:R＝0.96-0.98，例如，在本发明的一些具体实施例中，r:R可以分别为0.96、0.97和0.98等，有效降低了齿槽效应，同时保证了电机100的效率。
另外，在相关技术中，电机定子的磁轭宽和齿部宽的比值没有固定值，通常比值多为0.4-0.6，使定子轭部承担更大比例的铁损，以降低定子齿部的发热温升，但是会带来定子轭部温升过高的问题。若通过在电机上加套一个可导磁的外壳解决上述问题，在一定程度上可以降低定子轭部的磁通密度，降低定子轭部的铁损，但是会增加物料和工艺成本。
而在本发明中，参照图1所示，每个定子齿部12可以包括：定子齿部主体121和定子 齿靴122。其中，定子齿部主体121与定子轭部11相连，使定子齿部12与定子轭部11可以连接为一体。定子齿靴122设在定子齿部主体121的内端，一方面可以减小定子齿部12与转子铁芯20之间气隙磁阻，改善磁场分布，另一方面可以对绕设在定子齿部12上的绕组14进行固定，防止绕组14由定子齿部12的内端松脱，绕组14固定更加可靠。
此外，定子轭部11的宽度处处相等，以便于定子铁芯10成型。定子轭部11的宽度可以为W，每个定子齿部主体121的宽度可以为V。对于等外形的定子铁芯10，即定子铁芯10的最大径向尺寸D一定时，若W：V过小，会导致定子齿部12的磁通密度过高，甚至出现磁通密度饱和，在电机100工作过程中，定子齿部12的铁损较大，定子齿部12的温升过高。并且相邻两个定子齿部12之间的定子齿槽101过小，相邻两个定子齿部12距离过短，容易形成电磁回路，进而降低电机100的能效。
若W：V过大，会导致定子轭部11的磁通密度过高，甚至出现磁通密度饱和，在电机100工作过程中，定子轭部11的铁损较大而出现温升过高的现象。
因此，在本发明的一些实施例中，定子轭部11的宽度W和每个定子齿部主体121的宽度V可以满足W：V＝0.6-0.7，定子轭部11和定子齿部12可以更合理地分配定子铁芯10的磁通密度，使电机100的温升更加均衡，以提高电机100使用寿命和安全性能。例如，在本发明的一些具体实施例中，定子轭部11的宽度W与定子齿部主体121的宽度V的比值W：V可以分别为0.6、0.63、0.65、0.68和0.7等。
需要说明的是，在本发明中，定子轭部11的宽度W可以理解为环形的定子轭部11的内周面和外周面之间的距离，定子齿部主体121的宽度V可以理解为定子齿部主体121的沿定子轭部11周向的两个侧面之间的距离。
另外，环形的定子轭部11的内周面和外周面之间的距离可以处处相同，当然，环形的定子轭部11的内周面和外周面之间的距离也可以是不完全相同的，环形的定子轭部11的内周面和外周面之间的距离可以处处相同也可以不完全相同。但是，在本发明中，定子轭部11的任意位置处的宽度W和定子齿部主体121的任意位置处的宽度V都满足W：V＝0.6-0.7。
根据本发明实施例的电机100的定子铁芯10的定子轭部11的宽度W和定子齿部主体121的宽度V满足W：V＝0.6-0.7，磁通密度分配更合理，温升更加均衡，有利于提高使用寿命和安全性。
为进一步降低定子铁芯10的温升，根据本发明进一步的实施例，定子轭部11的宽度W和定子齿部主体121的宽度V可以进一步满足：W：V＝0.64-0.66。
根据本发明的一些实施例，如图1所示，每个定子齿部主体121的宽度可以处处相等，以便于定子铁芯10成型过程的模具设计，工艺更加简单。
进一步地，继续参照图1所示，定子轭部11可以为内轮廓和外轮廓均为圆形的圆环形， 定子轭部11的结构简单且便于成型。
此外，每个定子齿部主体121的宽度平分线可以经过定子孔102的中心，也就是说，每个定子齿部主体121沿定子孔102的径向延伸，有利于使磁场分布更对称均匀。
进一步地，参照图1所示，在定子轭部11的周向上，定子齿靴122的两端可以分别延伸超出定子齿部主体121，相邻两个定子齿靴122的相邻端间隔开或者相连。由此，可以对绕设在定子齿部12的绕组14进行固定，防止绕组14由定子齿部12的内端松脱，绕组14固定更加可靠。
根据本发明的一些实施例，电机100可以为无刷直流电机，功率P为500W-2000W，无刷直流电机无需碳刷进行换向，因此不存在碳刷磨损的现象，电机100的噪音更低，并且电机100的使用寿命更长。
根据本发明实施例的用于食品料理机200的电机100可以为变频无刷电机，根据食品料理机200所需要处理的食物种类的不同，变频无刷电机可以提供不同的转速、扭矩以及时间等，使具有电机100的食品料理机200智能化。此外，变频无刷电机无需碳刷等结构进行换向，不存在碳刷磨损，运行噪音更低，有利于提高食品料理机200的使用寿命和提高用户的使用感受。
如图4所示，根据本发明实施例的食品料理机200可以包括：料理容器210、食品处理件和根据本发明实施例的用于食品料理机200的电机100。
具体而言，料理容器210内可以形成有用于盛放食物的食物容纳腔，食品处理件可以与电机100传动连接，并且食品处理件可以伸入食物容纳腔内。由此，食品处理件可以在电机100的带动下相对于料理器容器210转动，进而可以对食物容纳腔内的食物进行处理。
由于根据本发明实施例的用于食品料理机200的电机100具有上述有益的技术效果，因此根据本发明实施例的食品料理机200有效解决了电机100的低速输出力小和高速振动噪音大的问题，提高了电机100的效率和安全性能。
进一步地，食品料理机200还可以包括机座220，料理容器210可以为杯体组件，杯体组件可拆卸地设于机座220，以便于取放食物和对杯体组件进行清洗。电机100可以安装于机座220，食品处理件可以为与杯体组件相连的刀组件，在杯体组件设于机座220时，电机100可以与刀组件传动连接，由此，电机100可以驱动刀组件相对于杯体组件转动，以使刀组件可以对食物进行切割等处理。
继续参照图4所示，食品料理机200还可以包括：电控***230和显示组件240。其中，电控***230包括电控板，电控板可以安装于机座220，并且电控板可以与电机100电连接以控制电机100工作。
显示组件240也可以安装于机座220，并且显示组件240可以与电控***230电连接， 使显示组件240可以用于显示食品料理机200的工作状态。在本发明的进一步的实施例中，显示组件240上可以具有操作按键，用户可以通过操作按键控制电控***230，进而控制食品料理机200的工作模式和状态等，使用更加方便。
可选地，在本发明中，食品料理机200可以为搅拌机、破壁机、原汁机、榨汁机或者豆浆机等。搅拌机转速较高，通过高速搅拌可以使食物混合更加均匀；破壁机转速高，可以用于处理较硬的食物，并且能够将食物中存在于果皮、果核以及根茎处的大量植化素充分破壁释放；原汁机转速较低，通过推进式挤压、低柔性提取的方式处理食物；榨汁机转速较高，可以实现更多种类的食物的粉碎混合；豆浆机转速较高，可以实现预热、打浆、煮浆和延时熬煮过程全自动化等功能。根据本发明实施例的电机100可以应用于更多种类的食品料理机200，满足更多使用需求，实用性更强。
根据本发明实施例的食品料理机200和电机100的其他构成以及操作对于本领域的普通技术人员来说是可知的，在此不再详细描述。
在本发明的描述中，需要说明的是，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通。对于本领域的普通技术人员而言，可以具体情况理解上述术语在本发明中的具体含义。
在本说明书的描述中，参考术语“实施例”、“具体实施例”、“示例”等的描述意指结合该实施例或示例描述的具体特征、结构、材料或者特点包含于本发明的至少一个实施例或示例中。在本说明书中，对上述术语的示意性表述不一定指的是相同的实施例或示例。而且，描述的具体特征、结构、材料或者特点可以在任何的一个或多个实施例或示例中在不干涉、不矛盾的情况下均可以以合适的方式相互结合。

Claims (20)

  1. 一种用于食品料理机的电机，其特征在于，包括：
    定子铁芯，所述定子铁芯包括环形的定子轭部和设于所述定子轭部的内周面的多个定子齿部，相邻两个所述定子齿部之间形成有定子齿槽，多个所述定子齿部限定出与所述定子轭部同轴的定子孔，所述定子轭部的径向截面的外轮廓大体为圆形且最大径向尺寸为D；
    转子铁芯，所述转子铁芯可转动地设在所述定子孔内且与所述定子孔同轴，所述转子铁芯的最大径向尺寸为d，其中，D和d满足：0.4≤d/D≤0.55。
  2. 根据权利要求1所述的用于食品料理机的电机，其特征在于，D和d进一步满足：0.5≤d/D≤0.55。
  3. 根据权利要求1或2所述的用于食品料理机的电机，其特征在于，所述转子铁芯内设有沿其周向间隔开设置且用于插设永磁体的多个磁体槽，所述磁体槽的两端分别延伸至所述转子铁芯的轴向两端，每个所述磁体槽在所述转子铁芯的周向上的至少一端设有用于对所述永磁体进行定位的定位槽。
  4. 根据权利要求3所述的用于食品料理机的电机，其特征在于，每个所述磁体槽在所述转子铁芯的周向上的两端的直线距离为b，所述转子铁芯的中心距离所述转子铁芯的外周面的最大径向距离为R，其中，b:R＝0.95-1.0。
  5. 根据权利要求3或4所述的用于食品料理机的电机，其特征在于，所述磁体槽距离所述转子铁芯的外周面的最小距离为a1，所述定位槽距离所述转子铁芯的外周面的最小距离为a2，其中，min(a1，a2)＝0.8mm-1.8mm。
  6. 根据权利要求3-5中任一项所述的用于食品料理机的电机，其特征在于，所述磁体槽为长条形的弧形槽或直线槽且所述磁体槽的长度方向的平分线经过所述转子铁芯的中心。
  7. 根据权利要求1-6中任一项所述的用于食品料理机的电机，其特征在于，所述定子铁芯还包括：
    多个定位凸起，多个定位凸起沿所述定子轭部的周向间隔开设于所述定子轭部的外周面，每个所述定位凸起沿所述定子轭部的径向延伸。
  8. 根据权利要求1-7中任一项所述的用于食品料理机的电机，其特征在于，所述转子铁芯的外周沿形成有多个沿其周向分布且向外凸出的极齿，相邻两个所述极齿之间形成有齿槽。
  9. 根据权利要求8所述的用于食品料理机的电机，其特征在于，所述极齿的法向齿廓形成为圆弧形，以所述转子铁芯的中心为圆心且与所述极齿的齿顶相切的圆的半径为R，与 所述齿槽的槽底相切且以所述转子铁芯的中心为圆心的圆的半径为r，其中，r:R＝0.96-0.98。
  10. 根据权利要求1-9中任一项所述的用于食品料理机的电机，其特征在于，所述定子轭部的宽度为W且所述定子轭部的宽度处处相等，每个所述定子齿部包括与所述定子轭部相连的定子齿部主体和设在所述定子齿部主体的内端的定子齿靴，每个所述定子齿部主体的宽度为V，其中，W：V＝0.6-0.7。
  11. 根据权利要求10所述的用于食品料理机的电机，其特征在于，W和V进一步满足：W：V＝0.64-0.66。
  12. 根据权利要求10或11所述的用于食品料理机的电机，其特征在于，每个所述定子齿部主体的宽度处处相等。
  13. 根据权利要求12所述的用于食品料理机的电机，其特征在于，所述定子轭部为内轮廓和外轮廓均为圆形的圆环形。
  14. 根据权利要求12或13所述的用于食品料理机的电机，其特征在于，在所述定子轭部的周向上，所述定子齿靴的两端分别延伸超出所述定子齿部主体，相邻两个所述定子齿靴的相邻端间隔开或相连。
  15. 根据权利要求1-14中任一项所述的用于食品料理机的电机，其特征在于，所述电机为无刷直流电机，功率P为500W-2000W。
  16. 根据权利要求1-14中任一项所述的用于食品料理机的电机，其特征在于，所述电机为变频无刷电机。
  17. 一种食品料理机，其特征在于，包括：
    料理容器，所述料理容器内形成有用于盛放食物的食物容纳腔；
    根据权利要求1-16中任一项所述的用于食品料理机的电机；
    用于对食物进行处理的食品处理件，所述食品处理件伸入所述食物容纳腔内且在所述电机的带动下相对于所述料理容器转动。
  18. 根据权利要求17所述的食品料理机，其特征在于，还包括：
    机座，所述料理容器为可拆卸地设于所述机座的杯体组件，所述电机安装于所述机座，所述食品处理件为与所述杯体组件相连的刀组件，所述电机在所述杯体组件设于所述机座时与所述刀组件传动连接以驱动所述刀组件相对于所述杯体组件转动。
  19. 根据权利要求18所述的食品料理机，其特征在于，还包括：
    电控***，所述电控***包括电控板，所述电控板安装于所述机座且与所述电机电连接以控制所述电机工作；
    用于显示所述食品料理机的工作状态的显示组件，所述显示组件安装于所述机座且与所 述电控***电连接。
  20. 根据权利要求17-19中任一项所述的食品料理机，其特征在于，所述食品料理机为搅拌机、破壁机、原汁机、榨汁机或豆浆机。
PCT/CN2018/098625 2018-03-07 2018-08-03 食品料理机和用于食品料理机的电机 WO2019169828A1 (zh)

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EP18908712.5A EP3731374A4 (en) 2018-03-07 2018-08-03 KITCHEN PROCESSOR AND ELECTRIC MOTOR FOR KITCHEN PROCESSOR
JP2020540417A JP7070975B2 (ja) 2018-03-07 2018-08-03 食品調理機及び食品調理機用のモータ
KR1020207019898A KR102434245B1 (ko) 2018-03-07 2018-08-03 식품 요리기 및 식품 요리기에 사용되는 모터
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