CN113708522A - High-reliability permanent magnet fault-tolerant steering motor - Google Patents
High-reliability permanent magnet fault-tolerant steering motor Download PDFInfo
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- 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
- H02K1/16—Stator cores with slots for windings
- H02K1/165—Shape, form or location of the slots
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- 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
- H02K1/278—Surface mounted magnets; Inset magnets
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/12—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors arranged in slots
- H02K3/16—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors arranged in slots for auxiliary purposes, e.g. damping or commutating
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/28—Layout of windings or of connections between windings
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2201/00—Specific aspects not provided for in the other groups of this subclass relating to the magnetic circuits
- H02K2201/15—Sectional machines
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
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- 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
- H02K2213/06—Machines characterised by the presence of fail safe, back up, redundant or other similar emergency arrangements
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Permanent Magnet Type Synchronous Machine (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The invention discloses a high-reliability permanent magnet fault-tolerant steering motor, which belongs to the technical field of fault-tolerant motors, wherein the motor adopts a structure of matching 20 poles with 24 slots, a winding mode adopts a tooth-separating winding mode of fractional slot single-layer concentrated windings, armature teeth are spanned with a high-voltage winding and a low-voltage winding, fault-tolerant teeth have no winding, and a magnetic circuit is provided; the stator adopts a large and small tooth distribution mode, and the stator teeth are of a parallel tooth type; the rotor adopts half embedded SPM topological structure, and the rotor includes permanent magnet and rotor core, and the permanent magnet is the surface-mounted structure, and rotor core is the design of forked tail cell type, is equipped with evenly spaced circular port on the rotor punching to it is the same with permanent magnet quantity. The invention solves the problem that the switching time of the high-voltage winding to the low-voltage winding is overlong because the double-winding motor applied to the double-source steering system can not realize the simultaneous operation of the high-voltage winding and the low-voltage winding, and ensures that the interphase mutual inductance of the motor and the high-voltage winding and the low-voltage winding are almost 0, thereby improving the fault-tolerant capability of the motor and reducing the interphase short-circuit fault probability.
Description
Technical Field
The invention relates to the technical field of fault-tolerant motors, in particular to a high-reliability permanent magnet fault-tolerant steering motor.
Background
The double-source steering system is applied to the field of electric automobiles at present, a steering motor is a key execution part of the steering system, the steering motor in the double-source steering system is a high-voltage and low-voltage double-source steering motor which is a double-winding permanent magnet fault-tolerant motor, and independent high-voltage windings and low-voltage windings are arranged in the double-source steering system, so that the 24V low voltage is automatically connected under the condition that high-voltage electric faults occur in the driving process of a vehicle, the vehicle can keep the power-assisted steering capacity, and the safe parking of the vehicle is realized.
At present, in the traditional double-winding motor technology, a motor adopts double-layer winding distribution and comprises double-layer distributed windings and double-layer concentrated windings, namely two sets of windings are positioned in the same slot, the double-layer distributed windings and the double-layer concentrated windings have larger phase-to-phase mutual inductance and high-low voltage winding mutual inductance, the fault-tolerant capability of the motor is poor, a motor body only has electric and electric isolation, the magnetic and heat of the high-low voltage windings are in a coupling state, the physical isolation cannot be realized, and the reliability of the motor is lower. In addition, because the traditional double-winding motor cannot realize the simultaneous operation of double windings, when a main fault occurs, the redundant winding can be switched in for backup operation only when the rotating speed of the motor drops to be close to 0, and the switching time is long. Zhengrong discloses the structure of offset armature teeth and tooth shoes in stator tooth offset permanent magnet fault-tolerant motor design and analysis, fully utilizes the area of an armature slot, improves the output torque of the motor, reduces torque pulsation, solves the problem that the fault-tolerant capability, power density and torque pulsation of the traditional permanent magnet fault-tolerant motor are difficult to be considered simultaneously, and has yet to be further deepened for the problems that the fault rate of the motor is increased and the fault-tolerant capability is reduced due to the uneven distribution of stator slot holes when the motor rotates. Chinese patent publication No. CN107011720X, published japanese patent No. 2017.08.04, entitled "double-winding stator" and motor, discloses that the double-winding stator makes two sets of windings belong to different polar-phase groups, thereby avoiding the coupling of the common magnetic paths between the two, and further solving the problem of high probability of interphase short-circuit fault caused by the contact of the armature winding ends.
Disclosure of Invention
The invention aims to solve the technical problem of the prior art, provides a high-reliability permanent magnet fault-tolerant steering motor, solves the problem that the switching time of switching a high-voltage winding into a low-voltage winding is too long due to the fact that a double-winding motor applied to a double-source steering system in the prior art cannot realize the simultaneous operation of the high-voltage winding and the low-voltage winding, enables the interphase mutual inductance of the motor and the high-voltage winding and the low-voltage winding to be almost 0, improves the fault-tolerant capability of the motor and reduces the interphase short-circuit fault probability.
The invention adopts the following technical scheme for solving the technical problems:
a high-reliability permanent-magnet fault-tolerant steering motor adopts 20-pole 24-slot matching, the electrical angle between two adjacent tooth slots is 150 degrees, the winding mode adopts a fractional-slot single-layer concentrated winding separated tooth winding mode, and a high-voltage side winding A is included1、B1、C1The low-voltage side winding is A2、B2、C2Three phases, wherein the windings adopt a high-voltage and low-voltage parallel structure, the two sets of windings are positioned in different slots, the fault-tolerant teeth provide loops for the permanent magnet and the armature windings, and the fault-tolerant teeth are used for physical isolation; the high-voltage winding adopts the number of parallel branches 1, the number of parallel winding is 3, the number of turns per tooth is 57, the number of parallel branches of low-voltage winding is 2, the number of parallel winding is 10, the number of turns per tooth is 7, the connection form of the high-voltage winding and the low-voltage winding is Y-shaped, each phase winding of the motor is supplied with power by an independent H-bridge driving circuit, the stator adopts a large tooth and small tooth distribution mode, the stator teeth are parallel teeth type, the rotor adopts a semi-embedded SPM topological structure, the rotor adopts a segmentation mode, the segmentation number of the rotor sections is 3, each section is 30mm, the staggered angle of the adjacent sections is 0 degree, the rotor comprises a permanent magnet and a rotor iron core, the permanent magnet is of a surface-mounted structure, the shape, the thickness and the pole arc width of each permanent magnet are the same, the neodymium iron boron is selected as a permanent magnet material, the rotor iron core is designed into a dovetail groove type, and is used for fixing magnetic steel。
Furthermore, the fractional-slot single-layer concentrated winding has a structure that 24 slots and 24 teeth are unfolded in the inner circle of a stator core, the ratio of the number of poles of a rotor to the number of slots of a stator is 5:6, a winding coil of each phase is independently wound on one stator tooth, only one coil is arranged in each slot, the end part of each tooth is provided with a pole shoe, the coil is directly wound on the stator tooth, and the pitch of the coil is 1.
Furthermore, the windings adopt a tooth-spaced winding structure, the two sets of windings are distributed at intervals according to vectors, and armature windings, namely a high-voltage winding and a low-voltage winding, are spanned on the armature teeth; the rated voltage of a high-voltage winding bus is 540V, the rated power is 3kW, the rated rotating speed is 1500r/min, and the rated current is 8.5A; the rated voltage of a low-voltage winding bus is 24V, the rated power is 1kW, the rated rotating speed is 1200r/min, and the rated current is 60A; each phase winding is formed by connecting two pole windings which are radially opposite in space in series, the fault-tolerant teeth have no winding, and the phases are isolated by the fault-tolerant teeth.
Furthermore, the stator adopts an unequal tooth structure, the outer diameter of the stator is 160mm, the inner diameter of the stator is 112mm, the width of a stator notch is 0.6mm, the depth of the notch is 2.7mm, the thickness of a stator slot yoke is 7.7mm, the length of a minimum air gap is 0.8mm, the armature teeth are large teeth, the fault-tolerant teeth are small teeth, the large teeth and the small teeth are arranged alternately, and the ratio of the armature teeth to the fault-tolerant teeth is 1.8: 1.
Furthermore, the rotor adopts a semi-embedded SPM topological structure, the outer diameter of the rotor is 110.4mm, the inner diameter of the rotor is 38mm, the stack height of a stator and a rotor is 90mm, the thickness of rotor magnetic steel is 4.5mm, the arc cutting eccentricity of the magnetic steel is 40mm, the pole arc coefficient is 0.78, and the magnetic steel is embedded in a rotor iron core; the iron core on the rotor is formed by laminating magnetic silicon steel sheets, and the silicon steel sheets are supported by high-performance rare earth.
Further, the permanent magnets are in a tile shape, magnetic fields are magnetized along the radial direction, the magnetic field directions of the permanent magnets in adjacent slots are oppositely arranged, and the permanent magnets are arranged around the rotor core in the sequence of NSNSNSNS.
Compared with the prior art, the invention adopting the technical scheme has the following beneficial effects:
1. the fractional-slot single-layer concentrated winding is adopted, physical isolation is realized among winding phases and between the main winding and the redundant winding through fault-tolerant teeth, so that electric isolation, magnetic isolation and thermal isolation among the winding phases, the main winding and the redundant winding are realized, the fault-tolerant performance is strong, the safety and the reliability are high, and the probability of phase-to-phase short circuit fault is small;
2. the interphase mutual inductance of the motor windings and the mutual inductance between the high-voltage windings and the low-voltage windings are almost 0, the fault-tolerant capability is strong, the high-voltage windings and the low-voltage windings can run simultaneously, and the switching time is short and is less than 0.25 s;
3. the semi-embedded SPM structure absorbs the characteristics of a convex rotor and an inserted rotor, the generation of larger magnetic leakage by the embedded structure is reduced, the armature reaction is reduced, the radial electromagnetic force is reduced, and the electromagnetic noise is reduced;
4. the width of the armature teeth is increased, namely the span of the tooth tips is increased, so that the width of the fault-tolerant teeth is reduced, the pitch of the fault-tolerant teeth is improved, and the aim of improving the winding factor is fulfilled;
5. the stator adopts a large tooth and a small tooth design so as to improve the slot filling rate and the power density, the overload capacity is improved, and the weakening of the cogging torque is better;
6. the invention designs the rotor of the motor in sections, simplifies the assembly complexity of the motor rotor and simplifies the processing of the motor.
Drawings
FIG. 1 is a schematic diagram of a highly reliable permanent magnet fault tolerant steering motor;
FIG. 2 is a half-plane development of the stator winding;
FIG. 3 is high and low voltage winding-no load line back EMF;
FIG. 4 is a radial force wave FFT analysis of the motor;
FIG. 5 is the variation of the low voltage winding quadrature-direct axis inductance with the armature current;
fig. 6 is a high voltage winding external characteristic curve.
In the figure: 1-high voltage side winding, 2-low voltage side winding, 3-fault-tolerant teeth, 4-armature teeth, 5-rotor iron core, 6-rotor, 7-permanent magnet, 8-stator, 9-stator iron core, 10-stator notch width, 11-stator notch depth,
Are stator slots.
Detailed Description
The present invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
The technical scheme of the invention is further explained in detail by combining the attached drawings:
as shown in fig. 1, a structural schematic diagram of a highly reliable permanent magnet fault-tolerant steering motor is shown, the motor adopts 20-pole 24-slot matching, a high-voltage side winding 1, a low-voltage side winding 2, fault-tolerant teeth 3, armature teeth 4, and a rotor core 5 is designed in a dovetail slot shape, fixed magnetic steel is used, a rotor 6 adopts a semi-embedded SPM topological structure, the rotor adopts a segmentation mode, the number of rotor segments is 3, each segment is 30mm, the staggered angle of adjacent segments is 0 °, the rotor comprises a permanent magnet 7 and a rotor core, the permanent magnet is in a surface-mounted structure, the shape, thickness and pole arc width of each permanent magnet are the same, the permanent magnet material is neodymium iron boron, the rotor core is designed in a dovetail slot shape, the fixed magnetic steel is provided with uniformly-spaced circular holes on a rotor punching sheet, and the number of the circular holes is the same as that of the permanent magnet; stator 8 adopts big or small tooth structure, and the stator tooth is parallel teeth, and stator notch width 10 is 0.6mm, and notch degree of depth 11 is 2.7mm for the increase of groove leakage inductance, the self-inductance of every looks winding of increase makes the winding can restrain short-circuit current under the short circuit state, and the stator of motor contains stator core 9 and coil and constitutes. The motor stator outer diameter is 160mm, the stator inner diameter is 112mm, the stator slot yoke thickness is 7.7mm, the minimum air gap length is 0.8mm, the rotor outer diameter is 110.4mm, the rotor inner diameter is 38mm, the stator and rotor stack height is 90mm, the rotor magnetic steel thickness is 4.5mm, the magnetic steel arc cutting eccentricity is 40mm, and the polar arc coefficient is 0.78.
The motor adopts 24-pole 20-slot, the electrical angle between two adjacent tooth slots is 150 degrees, the motor selects symmetrical six-phase windings, and magnetomotive force harmonic waves generated by corresponding fractional slot concentrated windings can cause smaller eddy current loss under the condition of a higher pole number of pole pairs; the winding coefficient of a 12s10p symmetrical six-phase winding reaches the highest, the motor is provided with two sets of armature windings, when one set of armature winding works, magnetomotive force harmonic waves are increased, the electromagnetic force order is reduced by half, namely unilateral electromagnetic force exists, large electromagnetic vibration is caused, and the 24s20p matching can be achieved by multiplying the 12s10p unit motor by 2. The motor adopts fractional slot single-layer concentrated windings, and physical isolation is realized between winding phases and between the main winding and the redundant winding through fault-tolerant teeth, so that electric isolation, magnetic isolation and thermal isolation among the winding phases, the main winding and the redundant winding are realized, and the fault-tolerant performance of the double three-phase motor is fully exerted. Rotor 6 adopts half embedded SPM topological structure, inlays the magnet steel in the rotor core, avoids the rotor too big centrifugal force to get rid of it and hold away when high-speed rotating, and half embedded SPM structure has absorbed protruding formula and bayonet rotor characteristics, reduces the embedded great magnetic leakage that produces.
The permanent magnet fault-tolerant steering motor is internally provided with an independent high-voltage winding and an independent low-voltage winding. The high-voltage winding receives high-voltage three-phase alternating current from the controller and drives the steering motor to work; the low-voltage winding receives low-voltage three-phase alternating current from the controller and drives the steering motor to work, and the high-voltage winding and the low-voltage winding are arranged in parallel and can work independently without mutual influence.
As shown in fig. 2, which is a half-plane development of a stator winding, the stator adopts an unequal tooth structure, thereby improving the slot filling rate, increasing the current flowing between slots, promoting the power density to be improved,
is a stator slot of an electric machine, wherein
And
between the two parts is an armature tooth,
and
between them is fault-tolerant teeth, the ratio of armature teeth to fault-tolerant teeth is 1.8:1, the windings adopt a spaced-tooth winding structure, the two sets of windings are distributed at intervals according to vectors, and the fault-tolerant teeth have no windingsArmature windings, namely a high-voltage winding and a low-voltage winding, are spanned on the armature teeth. The high-voltage winding is A1、B1、C1The rated voltage of a bus is 540V, the rated power is 3kW, the rated rotating speed is 1500r/min, the rated frequency is 250Hz, and the rated current is 8.5A, the number of parallel branches of a high-voltage winding is 1, the number of turns of each tooth is 57, the number of winding turns of the winding is 3, and the slot filling rate is 71%; the low-voltage winding is A2、B2、C2The bus has the rated voltage of 24V, the rated power of 1kW, the rated rotation speed of 1200r/min, the rated frequency of 200Hz, the rated current of 60A, the number of parallel branches of the low-voltage winding of 2, the number of turns of each tooth of 7, the number of parallel windings of 10, the slot filling rate of 29 percent and the connection forms of the high-voltage winding and the low-voltage winding of Y type. The windings are in high-voltage and low-voltage parallel connection, each phase of winding is formed by connecting two pole windings which are opposite in radial direction in space in series, the two sets of windings are positioned in different slots, the fault-tolerant teeth provide loops for the permanent magnet and the armature winding, and physical isolation is carried out through the fault-tolerant teeth.
As shown in FIG. 3, the back electromotive force of the no-load wire of the high-voltage winding and the low-voltage winding of the motor is 1500rpm in no-load operation, the sine of the back electromotive force of the high-voltage winding and the sine of the back electromotive force of the low-voltage winding are high, and the effective values are 212.06V and 13.02V respectively.
The stator adopts the design that big and small teeth are distributed at intervals, so that the motor can generate larger vibration and noise in the operation process. The main source of motor vibration noise is during radial electromagnetic force, and vibration and noise caused by radial electromagnetic force waves are related to force wave amplitude and force wave times, and stator core bending deformation is directly proportional to force wave amplitude and inversely proportional to the fourth power of force wave times, so the times (mainly four times) of electromagnetic force waves are increased, and the radial electromagnetic force influencing motor vibration and noise increase can be effectively reduced. For the stator magnetic field and the main pole magnetic field of the motor adopting fractional slot concentrated winding, the harmonic distribution is denser than that of integral slots, and the interaction of the stator magnetic field and the main pole magnetic field can generate radial force waves with the force wave times less than 4 more easily, so that the noise is reduced. As shown in fig. 4, in the FFT analysis of the radial force wave, the direct current component only causes the static deformation of the stator core, and does not cause vibration, and may not be considered, the main force wave component is a 2-fold power frequency component, i.e., a 500Hz force wave, and the corresponding main force wave modulus is 2 or 4 orders, where the 2-order modulus is higher and the electrical characteristic is higherThe magnetic vibration amplitude is small. Therefore, the primary modulus of the induced electromagnetic vibrations is a 4 th order force wave with an amplitude of approximately 3.5N/m2The frequency is 500 Hz.
As shown in fig. 5, a graph of the change of the quadrature-direct axis inductance of the low-voltage winding with the axis current shows that the low-voltage winding is switched to work under the fault of the high-voltage winding, the d-axis inductance is almost unchanged, Lq is not changed greatly and the linearity is very good by changing the armature current, the reluctance torque of the motor exists, and the reluctance torque of the motor is reduced along with the increase of the armature current.
As shown in fig. 6, the external characteristic curve of the high-voltage winding includes a bus voltage Ud =540V, a limit peak current Imax =22A, a base speed of the high-voltage winding is about 1900rpm, an output peak torque is about 48Nm, and considering that harmonic leakage inductance of a single-layer concentrated winding is larger than that of a distributed winding and a double-layer concentrated winding, even if an SPM structure is adopted, a direct-axis inductance is larger, so that weak magnetic rate is larger, and peak power of the high-voltage winding can reach 10.8 kW.
The above-mentioned embodiments, objects, technical solutions and advantages of the present invention are further described in detail, it should be understood that the above-mentioned embodiments are only illustrative of the present invention and are not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. A high-reliability permanent magnet fault-tolerant steering motor is characterized in that the motor adopts 20-pole 24-slot matching, the electrical angle between two adjacent tooth slots is 150 degrees, the winding mode adopts a fractional-slot single-layer concentrated winding separated tooth winding mode, and a high-voltage side winding A is included1、B1、C1The low-voltage side winding is A2、B2、C2Three phases, wherein the windings adopt a high-voltage and low-voltage parallel structure, the two sets of windings are positioned in different slots, the fault-tolerant teeth provide loops for the permanent magnet and the armature windings, and the fault-tolerant teeth are used for physical isolation; the high-voltage winding adopts 1 parallel branch number, 3 parallel winding number, 57 turns per tooth, 2 low-voltage winding parallel branch number, 10 parallel winding number, 7 turns per tooth, the connection form of the high-voltage winding and the low-voltage winding is Y-shaped, and each phase of the motor consists ofIndependent H bridge drive circuit power supply, the stator takes big or small tooth distribution mode, the stator tooth is the parallel teeth type, the rotor adopts half embedded SPM topological structure, the rotor adopts the segmentation mode, the rotor segmentation number is 3 sections, every section 30mm, adjacent section angle 0 that staggers, the rotor includes permanent magnet and rotor core, the permanent magnet is the surface-mounted structure, the shape of every permanent magnet, thickness and pole arc width are the same, neodymium iron boron is selected to permanent magnet material, rotor core is the design of forked tail cell type, with fixed magnet steel, be equipped with evenly spaced circular port on the rotor punching, and the same with permanent magnet quantity.
2. The fault-tolerant steering motor of claim 1, wherein the fractional-slot single-layer concentrated winding is of a structure that 24 slots and 24 teeth are spread out in the inner circle of a stator core, the ratio of the number of rotor poles to the number of stator slots is 5:6, a winding coil of each phase is wound on one stator tooth independently, only one coil is arranged in each slot, a pole shoe is arranged at the end of each tooth, the coils are wound on the stator teeth directly, and the coil pitch is 1.
3. The fault-tolerant steering motor of a high-reliability permanent magnet according to claim 1, wherein the windings adopt a spaced-apart tooth winding structure, the two windings are distributed at intervals according to vectors, armature windings, namely a high-voltage winding and a low-voltage winding, are spanned on the armature teeth; the rated voltage of a high-voltage winding bus is 540V, the rated power is 3kW, the rated rotating speed is 1500r/min, and the rated current is 8.5A; the rated voltage of a low-voltage winding bus is 24V, the rated power is 1kW, the rated rotating speed is 1200r/min, and the rated current is 60A; each phase winding is formed by connecting two pole windings which are radially opposite in space in series, the fault-tolerant teeth have no winding, and the phases are isolated by the fault-tolerant teeth.
4. The fault-tolerant steering motor of high-reliability permanent magnet according to claim 1, wherein the stator is of an unequal tooth structure, the outer diameter of the stator is 160mm, the inner diameter of the stator is 112mm, the width of a stator notch is 0.6mm, the depth of the notch is 2.7mm, the thickness of a stator slot yoke is 7.7mm, the length of a minimum air gap is 0.8mm, the armature teeth are large teeth, the fault-tolerant teeth are small teeth, the large teeth and the small teeth are arranged alternately, and the ratio of the armature teeth to the fault-tolerant teeth is 1.8: 1.
5. The fault-tolerant steering motor of a high-reliability permanent magnet is characterized in that the rotor adopts a semi-embedded SPM topological structure, the outer diameter of the rotor is 110.4mm, the inner diameter of the rotor is 38mm, the stack height of a stator and a rotor is 90mm, the thickness of rotor magnetic steel is 4.5mm, the arc cutting eccentricity of magnetic steel is 40mm, and the pole arc coefficient is 0.78, and the magnetic steel is embedded in a rotor iron core; the iron core on the rotor is formed by laminating magnetic silicon steel sheets, and the silicon steel sheets are supported by high-performance rare earth.
6. The fault-tolerant steering motor according to claim 1, wherein the permanent magnets are "tegular" in shape, the magnetic field is charged in the radial direction, the magnetic field directions of the permanent magnets in adjacent slots are oppositely arranged, and the permanent magnets are arranged around the rotor core in the order of NSNSNS.
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| CN202111262156.3A CN113708522A (en) | 2021-10-28 | 2021-10-28 | High-reliability permanent magnet fault-tolerant steering motor |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114268207A (en) * | 2021-12-25 | 2022-04-01 | 上海鎏汇达高科技发展集团有限公司 | Dual-redundancy permanent magnet synchronous motor |
| CN114285204A (en) * | 2021-12-31 | 2022-04-05 | 华中科技大学 | Permanent magnet fault-tolerant motor |
| CN115664078A (en) * | 2022-12-23 | 2023-01-31 | 南通大任永磁电机制造有限公司 | Multi-armature winding permanent magnet motor and control method thereof |
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| CN107070016A (en) * | 2017-04-18 | 2017-08-18 | 苏州汇川联合动力系统有限公司 | Double remaining stators and double remaining motors |
| CN109510558A (en) * | 2018-12-10 | 2019-03-22 | 南京理工大学 | A kind of fault tolerant permanent magnet machine drive system |
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2021
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| CN107070016A (en) * | 2017-04-18 | 2017-08-18 | 苏州汇川联合动力系统有限公司 | Double remaining stators and double remaining motors |
| CN109510558A (en) * | 2018-12-10 | 2019-03-22 | 南京理工大学 | A kind of fault tolerant permanent magnet machine drive system |
| CN109962551A (en) * | 2019-02-19 | 2019-07-02 | 华中科技大学 | A kind of double winding fault tolerant permanent magnet machine |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114268207A (en) * | 2021-12-25 | 2022-04-01 | 上海鎏汇达高科技发展集团有限公司 | Dual-redundancy permanent magnet synchronous motor |
| CN114285204A (en) * | 2021-12-31 | 2022-04-05 | 华中科技大学 | Permanent magnet fault-tolerant motor |
| CN114285204B (en) * | 2021-12-31 | 2023-03-28 | 华中科技大学 | Permanent magnet fault-tolerant motor |
| CN115664078A (en) * | 2022-12-23 | 2023-01-31 | 南通大任永磁电机制造有限公司 | Multi-armature winding permanent magnet motor and control method thereof |
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