CN109256874A - Stepper motor and valve gear with the stepper motor - Google Patents
Stepper motor and valve gear with the stepper motor Download PDFInfo
- Publication number
- CN109256874A CN109256874A CN201710570763.3A CN201710570763A CN109256874A CN 109256874 A CN109256874 A CN 109256874A CN 201710570763 A CN201710570763 A CN 201710570763A CN 109256874 A CN109256874 A CN 109256874A
- Authority
- CN
- China
- Prior art keywords
- stator
- rotor
- stepper motor
- core
- width
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
Links
Classifications
-
- 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
- H02K1/2706—Inner rotors
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K37/00—Motors with rotor rotating step by step and without interrupter or commutator driven by the rotor, e.g. stepping motors
- H02K37/10—Motors with rotor rotating step by step and without interrupter or commutator driven by the rotor, e.g. stepping motors of permanent magnet type
- H02K37/12—Motors with rotor rotating step by step and without interrupter or commutator driven by the rotor, e.g. stepping motors of permanent magnet type with stationary armatures and rotating magnets
- H02K37/14—Motors with rotor rotating step by step and without interrupter or commutator driven by the rotor, e.g. stepping motors of permanent magnet type with stationary armatures and rotating magnets with magnets rotating within the armatures
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
- Electrically Driven Valve-Operating Means (AREA)
Abstract
Stepper motor and valve gear with the stepper motor, the valve gear include stepper motor and valve module, and stepper motor drives valve module rotation；Stepper motor includes stator assembly and rotor assembly, stator module is set to the outer peripheral surface of rotor assembly, stator module includes stator core, slot insulation and stator winding, stator core includes stator yoke and stator teeth, stator teeth includes stator tooth neck and stator pole shoes, and stator winding is wound in stator tooth neck；Rotor assembly includes rotor core and rotor magnetic steel；Stator core is formed by silicon steel plate stacking, and rotor core is formed by silicon steel plate stacking, and rotor magnetic steel is fixed on rotor core periphery；In this way, stator core and rotor core are formed by silicon steel plate stacking, it is not easy to be saturated when the stator winding of stator module is passed through high current, is conducive to generate biggish magnetic field strength.
Description
[technical field]
The present invention relates to a kind of motors, and in particular to a kind of stepper motor.
[background technique]
Currently, having Hybrid stepping motor, PM Claw-pole stepping motors, variable reluctance stepper motor in the motor of stepper drive.
Under the conditions of equal volume, input power: Hybrid stepping motor torque is big, air gap is minimum；PM Claw-pole stepping motors torque is small,
Air gap is big；Variable reluctance stepper motor torque is moderate, air gap is small；Turn in the application environment of big air gap, export big motor
Square, it usually needs increase the volume and weight of stepper motor.
It does not use the scheme of magnetic material accordingly, with respect to stator core, to realize in the case where big air gap, only increases
Output torque does not increase the purpose of the volume and weight of stepper motor.
[summary of the invention]
The purpose of the present invention is to provide a kind of stepper motor and with the valve gear of the stepper motor, relative to stator
Iron core does not use the scheme of magnetic material, and in the case where guaranteeing that stepper motor volume and weight is constant, it is defeated to improve stepper motor
Torque out.
To achieve the above object, one embodiment of the present invention discloses a kind of stepper motor, including stator module and
Rotor assembly, the stator module are set to the rotor assembly periphery, the stator module include stator core, slot insulation with
And stator winding, the stator core include stator yoke and stator teeth, the stator teeth includes stator tooth neck and determines
Sub- pole shoe, the stator winding is wound in the stator tooth neck, forms stator slot between the adjacent stator teeth, described
Stator core is formed by silicon steel plate stacking, and the rotor assembly includes rotor core and rotor magnetic steel, and the rotor magnetic steel is solid
The rotor core described in the rotor core outer peripheral surface is formed by silicon steel plate stacking.
Embodiments of the present invention also disclose a kind of valve gear, and the valve gear includes stepper motor and valve module, institute
It states stepper motor and drives the valve module rotation, the stepper motor includes the stator assembly and rotor assembly stator module
It is set to the rotor assembly periphery, the stator module includes stator core, slot insulation and stator winding, the stator iron
Core includes stator yoke and stator teeth, and the stator teeth includes stator tooth neck and stator pole shoes, and the stator winding twines
It is around in the stator tooth neck, forms stator slot between the adjacent stator teeth, the rotor assembly includes rotor core
And rotor magnetic steel, the stator core are formed by silicon steel plate stacking, the rotor core is formed by silicon steel plate stacking, described
Rotor magnetic steel is fixed on the rotor core outer peripheral surface.
Compared with the background art, in technical solution provided by the invention, stator core and rotor core pass through silicon steel sheet
It is overrided to form, silicon steel sheet resistivity with higher and magnetic conductivity, and the mode laminated can reduce vortes interference, reduce iron core
Calorific value, extend the iron core service life.It is not easy to be saturated when the stator winding of stator module is passed through high current in this way, can generates
Biggish magnetic field strength.
[Detailed description of the invention]
Fig. 1 is a kind of broken section structural schematic diagram of refrigerant valve；
Fig. 2 is the schematic perspective view of stepper motor stator assembly and rotor assembly combined；
Fig. 3 is the structural schematic diagram of the first embodiment of stator core；
Fig. 4 is the magnetic line of force direction schematic diagram of stator winding A phase；
Fig. 5 is the magnetic line of force direction schematic diagram of stator winding B phase；
Fig. 6 is that stator winding A/B phase power-up sequence corresponds to schematic table；
Fig. 7 is the positive structure schematic of stepper motor stator assembly and rotor assembly combined；
Fig. 8 is the structural schematic diagram of second of embodiment of stator core；
Fig. 9 is the structural schematic diagram of the third embodiment of stator core；
[specific embodiment]
The present invention will be further explained below with reference to the attached drawings and specific examples:
In general, in air conditioner refrigerating field, valve gear be used to control refrigerant flow or refrigerant circulation whether, valve
Device includes stepper motor 1, and stepper motor 1 is mainly used in the aperture or on-off of control valve gear, and the present invention provides one kind
Stepper motor；Below by taking the stepper motor 1 of refrigerant valve 100 as an example, technical solution of the present invention is illustrated, certainly, we
Case is also applied for water valve or other valve gears using the stepper motor 1.
Referring to Fig. 1, refrigerant valve 100 includes stepper motor 1, upper end cover 2, casing 3 and valve module 4；Stepper motor 1 includes fixed
Sub-component 10 and rotor assembly 20, the gap between stator module 10 and rotor assembly 20 are air gap, the rotation of rotor assembly 20
The flux density in air gap is relied primarily on, so the size of air gap will affect magnetic field strength and output torque；Stator module 10 includes fixed
Sub- iron core 11, slot insulation 12 and stator winding 13, stator core 11 are formed by silicon steel plate stacking, are passed through arteries and veins in stator winding 13
It rushes electric current and forms magnetic field to drive rotor assembly 20 to rotate, rotor assembly 20 includes rotor core 21 and rotor magnetic steel 22, is turned
Sub- iron core 21 is formed by silicon steel plate stacking, and silicon steel sheet is for other permeability magnetic materials, resistivity with higher and magnetic
Conductance, and can reduce vortes interference by the way of laminating, reduce the calorific value of iron core, extends the iron core service life；Rotor magnetic steel
22 materials can be permanent-magnet ferrite, rare earth permanent magnet or composite permanent-magnetic material such as, can be sintered Nd-Fe-B permanent magnetic material or iron
Ferrite is fixed on 21 outer peripheral surface of rotor core in tile, relative to the rotor magnetic steel of other shapes, tile rotor magnetic
Steel 22 is easier to make the magnetic flux density waveforms in air gap close to sine wave, and waveform is not susceptible to distort, to reduce harmonic content and turn
The fluctuation of square keeps the operation of stepper motor 1 more stable；Upper end cover 2 is set to the top of rotor assembly 20, upper end cover 2 and rotor
Shaft in iron core 21 is connected, and shaft is equipped with upper limit site and lower limit site, and for limiting the rotation of rotor, upper end cover 2 is used
In rotor assembly 20 positioning and rotor assembly 20 is played a certain protective role；Between stator module 10 and rotor assembly 20
Casing 3 is set, and casing 3 can be by being welded and fixed with upper end cover 2, and casing 3 passes through the modes phase such as screw or fastener with valve module 4
To being fixedly connected, completely cut off the space outside chamber and casing 3 in valve gear；Valve module 4 is located at stator module 10 and rotor assembly
20 lower section, valve module 4 include valve seat and spool；Stepper motor 1 drives the spool of valve module 4 under the driving of pulse signal
Movement, to control the on-off in the channel of refrigeration system and the flow of refrigerant.
In conjunction with Fig. 1, Fig. 2 and Fig. 3, in the present embodiment, stepper motor 1 includes stator module 10 and rotor assembly 20, stator
10 are set to 20 periphery of rotor assembly, and the gap between stator module 10 and rotor assembly 20 is air gap；Stator module 10 includes
Stator core 11, slot insulation 12 and stator winding 13, stator core 11 include stator yoke 14 and stator teeth 15；The present embodiment
In, stator yoke 14 is to be process using silicon steel plate stacking with stator teeth 15, wherein stator yoke 14 and stator teeth 15
Be composed of multilayer silicon steel sheet, wherein composition stator yoke 14 and stator teeth 15 any layer silicon steel sheet be it is stamped and
At integral structure, be conducive in this way improve stator teeth and stator yoke bonding strength；It is fixed by taking two-phase stepping motor as an example
Sub- winding 13 includes A phase stator winding 13A and B phase stator winding 13B, stator winding 13A and stator winding 13B along stator core
11 circumferential sequence interaction arrangement, electric current is sequentially passed through in stator winding 13A and stator winding 13B, is produced in stator winding 13
Magnetisation field, driving rotor assembly 20 rotate, and stator teeth 15 includes stator tooth neck 16 and stator pole shoes 17, stator tooth neck 16
Connecting stator yoke portion 14 and stator pole shoes 17, stator pole shoes 17 are arranged than stator yoke 14 closer to the center of stator core 11；
Stator winding 13 is wound in stator tooth neck 16, forms stator slot 30 between adjacent stator teeth 15, slot insulation 12 be around
It, can be to avoid winding possible leaky when the energization of stator winding 13 in the insulating layer of 30 inner peripheral surface of stator slot.
In conjunction with referring to fig. 4 and Fig. 5, stator winding 13 generates magnetic field after being powered, in the general direction such as figure in magnetic line of force path
Shown in dotted line.Fig. 4 dotted line is the magnetic line of force path direction schematic diagram of A phase stator winding 13A, and Fig. 5 dotted line is B phase stator winding
The magnetic line of force path direction schematic diagram of 13B, stator winding 13 are wound in stator tooth neck 16, connect in parallel or in series with phase winding
It connects.
Referring to Fig. 6, when A phase stator winding 13A and B phase stator winding 13B is sequentially passed through high current, the magnetic field of formation is not
It is easily saturated, for refrigerant valve, high current is generally referred to as electric current >=1A electric current, due to the high magnetic conductivity of silicon steel sheet
Can, the magnetic field formed in air gap is not easy to be saturated, and can export biggish torque and rotor assembly 20 is driven to rotate.In order to improve essence
Degree reduces the vibration of stepper motor 1 and guarantees the stability that stepper motor 1 is run, can be finely divided, segment to current impulse
Each movement of stepper motor 1 is set to become multiple micro-steppings by a synchronizing afterwards, so that the stability of the operation of stepper motor 1 is improved,
The current waveform of 13A and 13B two-phase makes A, 90 ° of phase difference of B biphase current phase, can reduce humorous closer to sine wave after subdivision
Wave component reduces the fluctuation of output torque.Since stator core 11 and rotor core 21 are all made of silicon steel sheet, in stator winding 13
In in the case where same electric current, relatively large magnetic field strength and biggish output torque can be generated.Measure rotor action performance
Parameter include rotor speed and rotor step angle.Rotor speed is mainly related to pulse current frequency, rotor step angle it is big
It is small mainly related to the stator number of phases and rotor number of poles.
The number for defining rotor magnetic steel 22 is rotor number of poles Nr, and rotor number of poles meets following equation:
Wherein, p is the number of phases of stepper motor 1, that is, the group number of stator winding 13, and n 1, z are the number of stator slot 30, and m is stator
The ratio of the number of phases p of the number z and stepper motor 1 of slot 30；Rotor number of poles is more, and the positioning accuracy of valve gear is higher, rotor magnetic
The size of steel 22 will be smaller, but simultaneously, and the requirement to the processing of rotor magnetic steel 22, installation and technique for fixing also can be higher.?
In the present embodiment, the number of phases p of stepper motor 1 is 2, and the number z of stator slot 30 is 8, and rotor number of poles Nr is 12.Practical situations
In, the number z and rotor number of poles Nr of stator slot 30 at least have there are two types of combining, in the number z and rotor pole for meeting stator slot 30
The fit structure of number Nr can obtain on the basis of symmetrical winding magnetic field can unrestricted choice z and Nr coordinated scheme, such as 8 slots 12
Pole, 8 slot, 20 pole, 12 slot, 18 pole, 12 slots 30 extremely etc., will not enumerate, so the number z and rotor number of poles of stator slot 30 herein
Nr should be selected according to the actual situation.According to theoretical calculation, if the stator of stepper motor 1 uses 8 slot structures, rotor
Number of poles Nr calculation formula are as follows: Nr=16*n ± 4.N=1, Nr=16 ± 4.Since stepper motor 1 is small in size and is in the present embodiment
Unite, n=1 not high to the positioning accuracy request of stepper motor 1, and the number of phases p of stepper motor 1 is 2, and the number z of stator slot 30 is 8,
Use rotor number of poles Nr for 12 scheme.The stepper motor of this slot number fit structure be powered when can be generated in air gap compared with
Big magnetic field strength and output torque, driving stepper motor movement.The construction rotor number of poles is few, can guarantee processing and installation
Precision, while it being able to satisfy required precision of the system to stepper motor step angle again.
When step angle θ refers to stator excitation state of every switching, the angle that the rotor assembly 20 of stepper motor 1 turns over,
It directly affects the positioning accuracy of stepper motor 1, its size is determined by the number of phases and rotor number of poles of stepper motor 1, step pitch
Angle θ meets following formula:Wherein Nr is rotor number of poles, and p is the number of phases of stepper motor 1, and a is stepper motor
The error coefficient of step angle generation is often turned over, the value range of a is 0~0.5 °.Under actual working conditions, step angle will not
It is consistent every time with theoretical value, it will receive the influence of valve gear machining accuracy He the amount of magnetizing, and machining accuracy is higher, magnetize
Amount is bigger, and the value of a is smaller, and practical step angle is closer to theoretical value.Since there is the control system of stepper motor signal to feed back function
Can, the error that a upper step angle generates can be compensated in rotational action next time, so that the step pitch angle error of entire stroke
It is 0.In the embodiment of the present invention, error coefficient a is defined as 0.By formula it is found that 1 rotor number of poles of stepper motor is more, the number of phases more
More, step angle is with regard to smaller, and the positioning accuracy of stepper motor 1 is higher, but Nr is limited by mechanical processing technique.Due in this implementation
In example, the number of phases p=2 of rotor number of poles Nr=12, stepper motor 1, step angleAs rotor number of poles Nr=
20, the number of phases p=2 of stepper motor 1, step angleCan also use the number z of stator slot 30 for 12 side
Case, then rotor number of poles Nr is 18 or 30, when the number of phases p of stepper motor 1 is 2, the number z of stator slot 30 is 12, n 1, rotor
When number of poles Nr is 18, step angleWhen the number of phases p of stepper motor 1 is 2, the number z of stator slot 30 is 12,
N is 1, when rotor number of poles Nr is 30, step angleThe number of stator slot 30 should carry out according to the actual situation
Selection, to guarantee to obtain optimal slot number coordinated scheme.
Referring to Fig. 7, define along stator core 11 the radial inner circumferential from 11 outer rim of stator core to stator yoke 14 most
Short distance is stator yoke width W, defines the minimum range between circumferential 16 two sidewalls of stator tooth neck of stator core 11
For stator tooth neck width t, wherein forming stator slot 30 between the adjacent wall of adjacent stator tooth neck 16, stator yoke is wide
Spend the ratio of W and stator tooth neck width tRange be 0.3 to 1；Under actual operating conditions, select stator yoke width W with
The ratio of stator tooth neck width tRange be 0.4 to 0.6, to guarantee under equal conditions that output torque is maximum；Definition is along fixed
The distance between the two sidewalls of the circumferential stator pole shoes 14 of sub- iron core 11 are stator pole shoes width k, adjacent stator teeth 15
It is nearest in the side-walls distance of stator pole shoes 17, it defines along the distance between the two sidewalls of the circumferential rotor magnetic steel 22 of rotor core 21
For rotor magnetic pole width h, the ratio of stator pole shoes width k and rotor magnetic pole width hRange be 0.7 to 1；Further selection
The ratio of stator pole shoes width k and rotor magnetic pole width hRange be 0.8 to 0.9, to obtain the optimal output of valve gear
Energy；This design can guarantee that the magnetic field of rotor magnetic steel 22 acts on rotor iron to the maximum extent when stator winding 13 is powered
Core 21 improves the reaction speed and working efficiency of stepper motor 1.
In conjunction with referring to Fig. 1, Fig. 2 and Fig. 8, structural schematic diagram of the Fig. 8 for second of embodiment of stator core, refrigerant valve
100 include stepper motor 1, upper end cover 2, casing 3 and valve module 4；Stepper motor 1 includes stator module 10 and rotor assembly 20,
Air gap is formed between stator module 10 and rotor assembly 20；Stator module 10 include stator core 11, slot insulation 12 and stator around
Group 13, stator core 11 is formed by silicon steel plate stacking, and rotor assembly 20 includes rotor core 21 and rotor magnetic steel 22, rotor iron
Core 21 is formed by silicon steel plate stacking, and rotor magnetic steel 22 is sintered Nd-Fe-B permanent magnetic material, is fixed on rotor core in tile
21 outer peripheral surfaces, stator winding 13 include A phase stator winding 13A and B phase stator winding 13B.Connection relationship between each structure and
Effect with it is consistent above, details are not described herein again.Stator pole shoes 17 include 1 groove 18, axis of the groove 18 along stator core 11
Divide to by stator pole shoes 17 for the small tooth 19 of 2 stators.
The number for defining rotor magnetic steel 22 is rotor number of poles Nr, and rotor number of poles meets following equation:
Wherein, p is the number of phases of stepper motor 1, that is, the group number of stator winding 13, and n is that the corresponding stator of each stator pole shoes 17 is small
The number of tooth 19, n 2, z are the number of stator slot 30, and m is the ratio of the number z of stator slot 30 and the number of phases p of stepper motor 1.
In the present embodiment, the number of phases p of stepper motor 1 is 2, and the number z of stator slot 30 is 8, the corresponding stator of each stator pole shoes 17
The number n of small tooth 19 is 2, and rotor number of poles Nr is 28 or 36.Step angle θ meets following formula:Wherein Nr is
Rotor number of poles, p are the number of phases of stepper motor 1, and a is the error coefficient that stepper motor often turns over the generation of a step angle, the value of a
Range is 0~0.5 °.Under actual working conditions, step angle will not be consistent with theoretical value every time, it will receive valve gear
The influence of machining accuracy and the amount of magnetizing, machining accuracy is higher, and the amount of magnetizing is bigger, and the value of a is smaller, and practical step angle is closer to theoretical
Value.Since the control system of stepper motor has signal feedback function, the error that a upper step angle generates can turn next time
It is compensated in movement, so that the step pitch angle error of entire stroke is 0.In the embodiment of the present invention, error coefficient a is defined as 0.
It is the number of the small tooth 19 of the corresponding stator of each stator pole shoes 17, n for 8, n since the present embodiment uses the number z of stator slot 30
For 2 scheme, rotor number of poles Nr=28 or Nr=36, as rotor number of poles Nr=28, step angle
As rotor number of poles Nr=36, step angleCan also use the number z of stator slot 30 for 12 scheme, that
Rotor number of poles Nr=42 or Nr=54, when the number of phases p of stepper motor 1 is 2, the number z of stator slot 30 is 12, n 2, rotor
When number of poles Nr is 42, step angleWhen the number of phases p of stepper motor 1 is 2, the number z of stator slot 30 is
When 12, n 2, rotor number of poles Nr are 54, step angle
In conjunction with referring to Fig. 1, Fig. 2 and Fig. 9, structural schematic diagram of the Fig. 9 for the third embodiment of stator core, refrigerant valve
100 include stepper motor 1, upper end cover 2, casing 3 and valve module 4；Stepper motor 1 includes stator module 10 and rotor assembly 20,
Air gap is formed between stator module 10 and rotor assembly 20；Stator module 10 include stator core 11, slot insulation 12 and stator around
Group 13, stator core 11 is formed by silicon steel plate stacking, and rotor assembly 20 includes rotor core 21 and rotor magnetic steel 22, rotor iron
Core 21 is formed by silicon steel plate stacking, and rotor magnetic steel 22 is sintered Nd-Fe-B permanent magnetic material, is fixed on rotor core in tile
21 outer peripheral surfaces, stator winding 13 include A phase stator winding 13A and B phase stator winding 13B.Connection relationship between each structure and
Effect with it is consistent above, details are not described herein again.Stator pole shoes 17 include 2 grooves 18, axis of the groove 18 along stator core 11
Divide to by stator pole shoes 17 for the small tooth 19 of 3 stators.
The number for defining rotor magnetic steel 22 is rotor number of poles Nr, and rotor number of poles meets following equation:
Wherein, p is the number of phases of stepper motor 1, that is, the group number of stator winding 13, and n is that the corresponding stator of each stator pole shoes 17 is small
The number of tooth 19, n 3, z are the number of stator slot 30, and m is the ratio of the number z of stator slot 30 and the number of phases p of stepper motor 1.
In the present embodiment, the number of phases p of stepper motor 1 is 2, and the number z of stator slot 30 is 8, the corresponding stator of each stator pole shoes 17
The number n of small tooth 19 is 3, and rotor number of poles Nr is 44 or 52.Step angle θ meets following formula:Wherein Nr is
Rotor number of poles, p are the number of phases of stepper motor 1, and a is the error coefficient that stepper motor often turns over the generation of a step angle, the value of a
Range is 0~0.5 °.Under actual working conditions, step angle will not be consistent with theoretical value every time, it will receive valve gear
The influence of machining accuracy and the amount of magnetizing, machining accuracy is higher, and the amount of magnetizing is bigger, and the value of a is smaller, and practical step angle is closer to theoretical
Value.Since the control system of stepper motor has signal feedback function, the error that a upper step angle generates can turn next time
It is compensated in movement, so that the step pitch angle error of entire stroke is 0.In the embodiment of the present invention, error coefficient a is defined as 0.
It is the number of the small tooth 19 of the corresponding stator of each stator pole shoes 17, n for 8, n since the present embodiment uses the number z of stator slot 30
For 3 scheme, rotor number of poles Nr=44 or Nr=52, as rotor number of poles Nr=44, step angle
As rotor number of poles Nr=52, step angleCan also use the number z of stator slot 30 for 12 side
Case, then rotor number of poles Nr=66 or Nr=78, when the number of phases p of stepper motor 1 is 2, the number z of stator slot 30 is 12, n 3,
When rotor number of poles Nr is 66, step angleWhen stepper motor 1 number of phases p be 2, the number z of stator slot 30
For 12, n 3, when rotor number of poles Nr is 78, step angle
The number n of the small tooth 19 of stator corresponding to each stator pole shoes 17 should be selected according to the actual situation.Each stator
The number n of the small tooth 19 of stator corresponding to pole shoe 17 is related with the number of groove 18, n=groove number+1.Step angle θ is smaller,
The positioning accuracy of rotor is higher, and therefore, suitably fluting can effectively improve the work effect of stepper motor 1 on stator pole shoes 17
Rate, but step angle is smaller, the requirement to processing technology and mounting process is also higher.In practical application, need according to specific
Parameter request reasonably selects the number of groove 18 on stator pole shoes 17, selects the number z and rotor of appropriate stator slot 30
The coordinated scheme of number of poles Nr, to optimize the overall performance of valve gear.For the other details of this programme, including stator yoke width
The ratio of W and stator tooth neck width tRange and optimized scope and stator pole shoes width k and rotor magnetic pole width h
RatioRange and optimized scope etc. are all identical as a upper embodiment, and details are not described herein again.
It should be understood that above embodiments are merely to illustrate the present invention and not limit technical side described in the invention
Case, although this specification is referring to the above embodiments, the present invention has been described in detail, the common skill of this field
Art personnel should be appreciated that person of ordinary skill in the field still can modify or equivalently replace the present invention, and
All do not depart from the technical solution and its improvement of the spirit and scope of the present invention, should all cover in scope of the presently claimed invention
It is interior.
Claims (10)
1. a kind of stepper motor, including stator assembly and rotor assembly, the stator module is set to the rotor assembly periphery,
The stator module includes stator core, slot insulation and stator winding, and the stator core includes stator yoke and stator tooth
Portion, the stator teeth include stator tooth neck and stator pole shoes, and the stator winding is wound in the stator tooth neck, adjacent
The stator teeth between form stator slot, it is characterised in that: the stator core is formed by silicon steel plate stacking, described turn
Sub-component includes rotor core and rotor magnetic steel, and the rotor magnetic steel is fixed on rotor core described in the rotor core outer peripheral surface
It is formed by silicon steel plate stacking.
2. stepper motor according to claim 1, which is characterized in that the number for defining the rotor magnetic steel is rotor number of poles
Nr, the rotor number of poles Nr meet following formula: Wherein, p is the stepper motor
The number of phases, n 1, z are the number of the stator slot, and m is the ratio of the number z of the stator slot and the number of phases p of the stepper motor
Value；Preferably, the number of phases p of the stepper motor is 2, and the number z of the stator slot is 8, and the rotor number of poles Nr is 12.
3. stepper motor according to claim 1, it is characterised in that: the stator pole shoes include groove, the groove edge
The stator pole shoes are divided into the small tooth of stator, define the number of the rotor magnetic steel by the axial direction of the stator core, the groove
Meet following formula for rotor number of poles Nr, the rotor number of poles Nr:Wherein, p is described
The number of phases of stepper motor, n are the number of the corresponding small tooth of stator of each stator teeth, and z is of the stator slot
Number, m are the ratio of the number z of the stator slot and the number of phases p of the stepper motor.
4. stepper motor according to claim 2 or 3, it is characterised in that: the stepper motor includes step angle θ, described
When step angle θ refers to stator excitation state of every switching, the angle that the rotor assembly of the stepper motor turns over, the step pitch
Angle θ meets following formula:Wherein, Nr is the rotor number of poles, and p is the number of phases of the stepper motor, and a is
Stepper motor often turns over the error coefficient of step angle generation, and the value range of a is 0~0.5 °.
5. stepper motor according to any one of claims 1 to 4, it is characterised in that: define the diameter along the stator core
It is stator yoke width W to the shortest distance of the inner circumferential from the stator core outer rim to the stator yoke, defines along described
Minimum range between the circumferential direction of stator core stator tooth neck two sidewalls is stator tooth neck width t, wherein adjacent
The stator slot, the stator yoke width W and the stator tooth neck are formed between the adjacent wall of the stator tooth neck
The ratio of width tRange be 0.3 to 1；Preferably, the ratio of the stator yoke width W and the stator tooth neck width t
ValueRange be 0.4 to 0.6.
6. stepper motor according to any one of claims 1 to 5, it is characterised in that: definition is circumferential along the stator core
The distance between two sidewalls of the stator pole shoes are stator pole shoes width k, and the adjacent stator teeth is in the stator poles
Recently, definition is rotor along the distance between two sidewalls of the circumferentially described rotor magnetic steel of the rotor core to the side-walls distance of boots
The ratio of magnet pole widths h, the stator pole shoes width k and the rotor magnetic pole width hRange be 0.7 to 1；Preferably, institute
State the ratio of stator pole shoes width k Yu the rotor magnetic pole width hRange be 0.8 to 0.9.
7. stepper motor according to any one of claims 1 to 6, it is characterised in that: the material of the rotor magnetic steel is to burn
Nd-Fe-B permanent magnet material is tied, the rotor magnetic steel is in tile, and the rotor magnetic steel fits in the outer peripheral surface of the rotor core.
8. stepper motor according to claim 1, it is characterised in that: the number for defining the rotor magnetic steel is rotor number of poles
Nr, the rotor number of poles Nr meet following formula: Wherein, p is the stepper motor
The number of phases, n 1, z are the number of the stator slot, and m is the ratio of the number z of the stator slot and the number of phases p of the stepper motor
Value；Preferably, the number of phases p of the stepper motor is 2, and the number z of the stator slot is 8, and the rotor number of poles Nr is 12；
The stator pole shoes include groove, and the groove is along the axial direction of the stator core, and the groove is by the stator pole shoes
It is divided into the small tooth of stator, the number for defining the rotor magnetic steel is rotor number of poles Nr, and the rotor number of poles Nr meets following formula:Wherein, p is the number of phases of the stepper motor, and n is that each stator teeth is corresponding
The number of the small tooth of stator, z are the number of the stator slot, and m is the phase of the number z and the stepper motor of the stator slot
The ratio of number p；
Define the shortest distance of the radial inner circumferential from the stator core outer rim to the stator yoke along the stator core
For stator yoke width W, the minimum range defined between the circumferential direction stator tooth neck two sidewalls of the stator core is
Stator tooth neck width t, wherein forming the stator slot, the stator between the adjacent wall of the adjacent stator tooth neck
The ratio of yoke portion width W and the stator tooth neck width tRange be 0.3 to 1；Preferably, the stator yoke width W
With the ratio of the stator tooth neck width tRange be 0.4 to 0.6；
Definition is stator pole shoes width k along the distance between two sidewalls of the circumferentially described stator pole shoes of the stator core, adjacent
The stator teeth the stator pole shoes side-walls distance recently, define along the circumferentially described rotor magnetic of the rotor core
The distance between two sidewalls of steel are rotor magnetic pole width h, the ratio of the stator pole shoes width k and the rotor magnetic pole width h
ValueRange be 0.7 to 1；Preferably, the ratio of the stator pole shoes width k and the rotor magnetic pole width hRange be
0.8 to 0.9；
The stepper motor includes step angle θ, when the step angle θ refers to stator excitation state of every switching, the stepping
The angle that the rotor assembly of motor turns over, the step angle θ meet following formula:Wherein, Nr is described turns
Sub- number of poles, p are the number of phases of the stepper motor, and a is the error coefficient that stepper motor often turns over the generation of a step angle, and a's takes
Being worth range is 0~0.5 °；
The material of the rotor magnetic steel is sintered Nd-Fe-B permanent magnetic material, and the rotor magnetic steel is in tile, the rotor magnetic steel
Fit in the outer peripheral surface of the rotor core；
The stator yoke and the stator teeth are integrally formed.
9. a kind of valve gear, the valve gear includes stepper motor and valve module, and the stepper motor drives the valve module to turn
It is dynamic, which is characterized in that the stepper motor includes stator assembly and rotor assembly that the stator module is set to the rotor set
Part periphery, the stator module include stator core, slot insulation and stator winding, the stator core include stator yoke and
Stator teeth, the stator teeth include stator tooth neck and stator pole shoes, and the stator winding is wound in the stator tooth neck
Portion, forms stator slot between the adjacent stator teeth, and the rotor assembly includes rotor core and rotor magnetic steel, described fixed
Sub- iron core is formed by silicon steel plate stacking, and the rotor core is formed by silicon steel plate stacking, and the rotor magnetic steel is fixed on institute
State rotor core outer peripheral surface.
10. valve gear according to claim 9, it is characterised in that: the number for defining the rotor magnetic steel is rotor number of poles
Nr, the rotor number of poles Nr meet following formula: Wherein, p is the stepper motor
The number of phases, n 1, z are the number of the stator slot, and m is the ratio of the number z of the stator slot and the number of phases p of the stepper motor
Value；Preferably, the number of phases p of the stepper motor is 2, and the number z of the stator slot is 8, and the rotor number of poles Nr is 12；
The stator pole shoes include groove, and the groove is along the axial direction of the stator core, and the groove is by the stator pole shoes
It is divided into the small tooth of stator, the number for defining the rotor magnetic steel is rotor number of poles Nr, and the rotor number of poles Nr meets following formula:Wherein, p is the number of phases of the stepper motor, and n is that each stator teeth is corresponding
The number of the small tooth of stator, z are the number of the stator slot, and m is the phase of the number z and the stepper motor of the stator slot
The ratio of number p；
Define the shortest distance of the radial inner circumferential from the stator core outer rim to the stator yoke along the stator core
For stator yoke width W, the minimum range defined between the circumferential direction stator tooth neck two sidewalls of the stator core is
Stator tooth neck width t, wherein forming the stator slot, the stator between the adjacent wall of the adjacent stator tooth neck
The ratio of yoke portion width W and the stator tooth neck width tRange be 0.3 to 1；Preferably, the stator yoke width W
With the ratio of the stator tooth neck width tRange be 0.4 to 0.6；
Definition is stator pole shoes width k along the distance between two sidewalls of the circumferentially described stator pole shoes of the stator core, adjacent
The stator teeth the stator pole shoes side-walls distance recently, define along the circumferentially described rotor magnetic of the rotor core
The distance between two sidewalls of steel are rotor magnetic pole width h, the ratio of the stator pole shoes width k and the rotor magnetic pole width h
ValueRange be 0.7 to 1；Preferably, the ratio of the stator pole shoes width k and the rotor magnetic pole width hRange be
0.8 to 0.9；
The stepper motor includes step angle θ, when the step angle θ refers to stator excitation state of every switching, the stepping
The angle that the rotor assembly of motor turns over, the step angle θ meet following formula:Wherein, Nr is described turns
Sub- number of poles, p are the number of phases of the stepper motor, and a is the error coefficient that stepper motor often turns over the generation of a step angle, and a's takes
Being worth range is 0~0.5 °；
The material of the rotor magnetic steel is sintered Nd-Fe-B permanent magnetic material, and the rotor magnetic steel is in tile, the rotor magnetic steel
Fit in the outer peripheral surface of the rotor core；
The stator yoke and the stator teeth are integrally formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710570763.3A CN109256874A (en) | 2017-07-13 | 2017-07-13 | Stepper motor and valve gear with the stepper motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710570763.3A CN109256874A (en) | 2017-07-13 | 2017-07-13 | Stepper motor and valve gear with the stepper motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109256874A true CN109256874A (en) | 2019-01-22 |
Family
ID=65051153
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710570763.3A Pending CN109256874A (en) | 2017-07-13 | 2017-07-13 | Stepper motor and valve gear with the stepper motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109256874A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101379674A (en) * | 2006-02-02 | 2009-03-04 | 株式会社美姿把 | Electric power steering device |
| CN102263445A (en) * | 2010-05-31 | 2011-11-30 | 德昌电机(深圳)有限公司 | Brushless motor |
| CN103427509A (en) * | 2012-05-17 | 2013-12-04 | 深圳市配天电机技术有限公司 | Concentrated-winding motor, generator and motor |
| CN103812241A (en) * | 2014-03-13 | 2014-05-21 | 山东大学 | Stator permanent magnet mixed stepping motor |
| CN105422915A (en) * | 2014-09-18 | 2016-03-23 | 杭州三花研究院有限公司 | Electromagnetic control valve |
-
2017
- 2017-07-13 CN CN201710570763.3A patent/CN109256874A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101379674A (en) * | 2006-02-02 | 2009-03-04 | 株式会社美姿把 | Electric power steering device |
| CN102263445A (en) * | 2010-05-31 | 2011-11-30 | 德昌电机(深圳)有限公司 | Brushless motor |
| CN103427509A (en) * | 2012-05-17 | 2013-12-04 | 深圳市配天电机技术有限公司 | Concentrated-winding motor, generator and motor |
| CN103812241A (en) * | 2014-03-13 | 2014-05-21 | 山东大学 | Stator permanent magnet mixed stepping motor |
| CN105422915A (en) * | 2014-09-18 | 2016-03-23 | 杭州三花研究院有限公司 | Electromagnetic control valve |
Non-Patent Citations (1)
| Title |
|---|
| 坂本正文: "《步进电机应用技术》", 科学出版社, pages: 37 - 38 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| AU2004247246B2 (en) | Radial airgap, transverse flux motor | |
| US7034427B2 (en) | Selective alignment of stators in axial airgap electric devices comprising low-loss materials | |
| JP4821902B2 (en) | Motor and motor drive system including the same | |
| JP6215913B2 (en) | Multi-phase permanent magnet motor with adjustable leakage inductance | |
| US6211595B1 (en) | Armature structure of toroidal winding type rotating electric machine | |
| US20080246362A1 (en) | Radial airgap, transverse flux machine | |
| US20040251761A1 (en) | Radial airgap, transverse flux motor | |
| US20070024147A1 (en) | Selective alignment of stators in axial airgap electric devices comprising low-loss materials | |
| JP2006060952A (en) | Permanent magnet embedded motor | |
| US20150048704A1 (en) | Double stator permanent magnet machine | |
| CN109802501A (en) | A kind of divided stator carnassial tooth flux switching motor | |
| CN102005879B (en) | Electric excitation part double stator brushless mixed excitation synchronous generator | |
| JP2008136348A (en) | Electric motor or generator | |
| WO2005046022A1 (en) | Permanent-magnet synchronous motor and compressor using this | |
| CN208285086U (en) | Stepper motor and valve gear with the stepper motor | |
| KR102339220B1 (en) | New two-stator and two-rotor combined energy-saving motor | |
| JP4484922B2 (en) | Electric motor or generator | |
| Madhavan et al. | A novel technique for minimizing torque ripple in axial flux segmented rotor SRM | |
| KR101546794B1 (en) | BLDC motor with rotor equipped with the modular permanent magnet | |
| CN109256874A (en) | Stepper motor and valve gear with the stepper motor | |
| JP2006254621A (en) | Permanent magnet type motor | |
| JP4402713B2 (en) | Electric motor or generator | |
| JP2007166798A (en) | Dynamo-electric machine, compressor, blower, and air conditioner | |
| KR101558156B1 (en) | Outer rotor for switching reluctance motor | |
| JP2014054097A (en) | Rotary electric machine system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |