113 results about "Pole number" patented technology

The invention discloses a motor, a compressor and refrigeration equipment, and relates to the technical field of permanent magnet motors, the motor comprises a stator iron core and a rotor iron core, rotor holes are formed in the inner circumference of the stator iron core, the number of stator grooves is Q, the width of each stator groove opening in the circumferential direction is W, and the minimum radius of each rotor hole is R; an inter-pole groove is concavely arranged between every two adjacent magnetic steel grooves and on the periphery of the rotor core, n harmonic grooves distributed at intervals are further concavely arranged on the periphery of the rotor core in sequence, central angles of the n harmonic grooves are A1, A2, and An in sequence on the circle center of the rotor core, a central angle of the inter-pole groove is As, and the number of poles of the motor is 2P, and the formula is satisfied. The technical scheme provided by the invention aims to suppress harmonic waves, reduce torque pulsation and further reduce the operation noise of the motor.

The invention discloses a motor, a compressor and refrigeration equipment, and relates to the technical field of refrigeration equipment, the motor comprises a rotor and a stator, the rotor is rotatably arranged in the stator, the thickness of a permanent magnet in the magnetizing direction is hm, and the coercive force is Hcj; the number of poles of the rotor is p; the stator comprises a stator core, the stator core comprises a plurality of first stator punching sheets and a plurality of second stator punching sheets which are laminated, the first stator punching sheets are made of silicon steel materials, and the total length of the first stator punching sheets in the axial direction of the stator is h1; the second stator punching sheets are made of amorphous alloy materials, the total length of the second stator punching sheets in the axial direction of the stator is h2, and at least one first stator punching sheet is located at the lowest end of the axial direction of the stator iron core. According to the technical scheme provided by the invention, balance is found between reservation of the low iron loss advantage of the amorphous alloy material and realization of reliable assembly of the stator and the main shell through relevant parameter constraints, so that the amorphous iron core can be prevented from being extruded, the cost is reduced, and the energy efficiency of the compressor is improved.

To provide a method for estimating an axis error between a d-q axis and a γ-δ axis in a synchronous motor.SOLUTION: In a control method for driving a synchronous motor by sensorless vector control, a magnetic axis of a permanent magnet of the synchronous motor is defined as a d-axis, a direction orthogonal to the d-axis is defined as a q-axis, a designated magnetic axis of the synchronous motor is defined as a γ-axis, and a direction orthogonal to the γ-axis is defined as a δ-axis, and when vγ iγ+vδ iδ=P / 2 ωR ΦM iδ+R (iδ^2+iγ^2) is established, it is estimated that the d-q axis and the γ-δ axis coincide with each other without an error, and when the above expression is not established, an amount of the error is estimated from a difference between the left side and the right side. vγ represents a γ-axis voltage [V], iγ represents a γ-axis current [A], vδ represents a δ-axis voltage [V], iδ represents a δ-axis current [A], P represents a motor pole number, R represents a motor one-phase resistance value [Ω], ωR represents a motor electrical angular speed [rad / s], and ΦM represents a magnet flux [wb].SELECTED DRAWING: Figure 2

The invention relates to the technical field of motors, and discloses a flywheel energy storage motor stator-rotor structure and an optimization method thereof, and the flywheel energy storage motor stator-rotor structure comprises a stator body, a rotor body and a motor air gap. The method further comprises the following steps: step 1, designing an air-gap magnetic field: by adjusting the shape and the arrangement mode of a motor air gap or a permanent magnet, enabling a flux density waveform to be close to a sine wave when the motor air gap is in a no-load state so as to suppress harmonic waves; step 2, slot-pole matching design: a stator winding adopts a fractional slot concentrated winding form, a high fundamental wave winding factor is obtained by adjusting the matching relation between stator slots and permanent magnet pole numbers, and specific subharmonics are suppressed from a winding magnetomotive force level; 3, magnetic circuit and structure design: magnetic circuit saturation is suppressed by adjusting the geometric dimensions of stator teeth and a yoke part; according to the invention, the comprehensive performance targets of high torque density, high efficiency and low torque pulsation of the flywheel motor can be realized at the same time.

The invention discloses an axial flux permanent magnet synchronous reluctance motor rotor based on modular harmonic counteracting, the rotor is designed in a three-in-one mode of structure modularization, magnetic barrier gradient and phase computable dislocation, a rotor assembly is formed by splicing N fan-shaped rotor modules along the circumference, and the adjacent modules are provided with optimal dislocation angles calculated according to the harmonic counteracting principle. The sum of target harmonic magnetic field vectors generated by each module is zero; a U-shaped magnetic barrier array of which geometric parameters are monotonically changed in a gradient manner is arranged in the fan-shaped rotor module, and a permanent magnet group is embedded in the fan-shaped rotor module; main electromagnetic harmonic waves are offset from the source, magnetism gathering and resistance increasing functions are decoupled, the mechanical robustness and the electromagnetic performance of the motor are improved, meanwhile, overall machining is converted into standardized module assembling, the manufacturing cost and the maintenance difficulty are reduced, different motor pole numbers can be flexibly adapted, and the service life of the motor is prolonged. The method is suitable for high-end application scenes such as new energy automobiles, industrial driving and aerospace.

This application relates to an odd-even mixed-layer winding structure, a stator assembly, and a motor device. The stator assembly has 2p poles, and the stator core has Z stator slots, where Z = 12p. Each pair of stator slots forms a group. Within the same group, the stator slot on the left side has slot layers 1, 2, ..., m sequentially, and the stator slot on the right side has slot layers 1, 2, ..., (m+1) sequentially. Each winding branch includes several hairpin coils. The hairpin coils have m / 2+1 cross-layer configurations: crossing slot layers 1 and 2, slot layers 3 and 4, ..., slot layers (m-1) and m, and slot layers (m+1) and (m+1) respectively. This application can effectively avoid generating large stator-side magnetomotive force harmonics during motor device operation, thereby reducing the proportion of back EMF harmonics and preventing the performance of the motor device from being affected.

The application provides a stator of a flat wire motor and the flat wire motor, the slot number of each pole and each phase of the stator is 3, the pole number of the stator is an even multiple of 3, the layer number formed by the flat wire stator winding in the winding slot is 2M, M is an even number greater than or equal to 2; the winding comprises a three-phase winding, each phase winding comprises two parallel branches, each branch is formed by a plurality of U-shaped sub-conductors in series; each phase winding comprises a plurality of conductor groups, each conductor group comprises three sub-conductors, and the span is K+1, K and K-1 respectively; each sub-conductor spans two adjacent layers, which are the 2N layer and the 2N-1 layer respectively; the slots occupied by the sub-conductor are in the M layers located on the radial inner side, three continuous inner slots are occupied by each pole and each phase, three continuous outer slots are occupied by each pole and each phase in the M layers located on the radial outer side, and the three inner slots and the three outer slots of each pole and each phase are staggered by one slot position in the circumferential direction. According to the stator structure, the manufacturing cost is low, the harmonic influence is small, and the working performance is good.

The application discloses a rotary compressor and a refrigeration equipment, the rotary compressor comprises a shell, a motor and a compression mechanism, the motor and the compression mechanism are arranged in the shell, the motor comprises a stator and a rotor, the compression mechanism comprises a crankshaft, the crankshaft is connected with the rotor, the rotary compressor satisfies 5<=GCD(Q,P)<=6; wherein, Q is the slot number of the stator, P is the pole number of the rotor, D2 is the inner diameter of the stator, D1 is the outer diameter of the stator, T1 is the thickness of the stator core of the stator, and d is the diameter of the crankshaft. The rotary compressor provided by the application adopts reasonable ratio settings for the slot number Q of the stator, the pole number P of the rotor, the outer diameter D1 of the stator, the inner diameter D2 of the stator, the thickness T1 of the stator core and the diameter d of the crankshaft, thereby improving the operation stability and energy efficiency of the rotary compressor.

The application discloses a motor, a compressor and a refrigeration device, and relates to the technical field of compressors, wherein the motor comprises a stator and a rotor, the stator is provided with a plurality of stator slots, and the number of the stator slots is Q; the rotor is arranged on the inner side of the stator; wherein the rotor pole number of the rotor lamination is 2P, the maximum distance from the outer edge of the rotor lamination to the center of the rotor is Ro, the minimum distance from the outer edge of the rotor lamination to the center of the rotor is Ri, the magnet slot has a first end point and a second end point closest to the outer edge of the rotor lamination, the included angle between the first end point and the second end point and the center of the rotor is alpha, the angle occupied by each magnetic pole on the rotor lamination is beta, 0.03mm<=Ro<=0.1mm, 0.12<=Ri<=0.15; the technical scheme provided by the application can improve the energy efficiency of the motor.

The invention discloses a motor, a compressor and refrigeration equipment, and relates to the technical field of motors, and the motor comprises a stator and a rotor; the stator comprises a stator core and a plurality of windings, the stator punching sheet comprises a stator yoke and a plurality of stator teeth which are distributed along the inner circumference of the stator yoke at intervals, two adjacent stator teeth and the stator yoke enclose a stator slot, and the windings are wound on the stator teeth; the rotor comprises a rotor iron core and a plurality of magnetic steels, and the magnetic steels are distributed along the circumferential direction of the rotor iron core; the number of the stator grooves is Q, the number of turns of the winding is N, the wire diameter of the winding is phi, the phase number of the motor is M, the number of poles of the rotor is P, and phi * M * P / (Q * N) is larger than or equal to 0.007 and smaller than or equal to 0.021. According to the technical scheme, the energy efficiency of the motor is improved, the use requirement of the compressor is met, and the cost of the motor is reduced.

The invention discloses a permanent magnet ring V-shaped asymmetric skewed pole magnetizing clamp and a using method thereof, and relates to the technical field of motor magnetizing. The invention aims to solve the problems of large bearing wear and poor harmonic suppression effect in the existing method for realizing the integral skewed pole. A magnetizing clamp inner yoke and a magnetizing clamp outer yoke can be coaxially connected to the inner side and the outer side of a permanent magnet ring to be magnetized in a sleeving mode correspondingly, and the number of pole heads of the magnetizing clamp inner yoke and the number of pole heads of the magnetizing clamp outer yoke are the same as the number of poles of the permanent magnet ring; coils with the same number of turns are wound on the pole heads of the magnetizing clamp inner yoke and the magnetizing clamp outer yoke, the winding directions of the coils on the adjacent pole heads are opposite, and the coils on all the pole heads are connected in series; the axial length of the magnetizing clamp inner yoke and the axial length of the magnetizing clamp outer yoke meet the requirement.

The invention provides a salient pole reluctance rotor switch flux linkage motor with maximum fundamental wave ratio magnetic conductance, which belongs to the technical field of stator permanent magnet synchronous motors and comprises a stator iron core, permanent magnets, armature windings and a salient pole reluctance rotor. The stator iron core is composed of a plurality of identical U-shaped iron cores. The permanent magnets are arranged between two adjacent U-shaped iron cores; the armature windings are wound on the adjacent U-shaped iron cores; the salient pole reluctance rotor is arranged in the stator core, and the overall dimension of the salient pole reluctance rotor is calculated and determined according to the inner diameter of the stator, the length of an air gap and the number of poles of the stator, so that the salient pole reluctance rotor is of a salient pole rotor structure with the maximum fundamental wave ratio magnetic conductance, and the torque pulsation of the switched flux linkage motor is reduced. The motor has the advantages of low torque pulsation, simple structure, high reliability and the like, and is suitable for occasions with high requirements on motor torque pulsation performance, such as numerical control machine tools, intelligent robots and the like.

The application provides a rotor wireless excitation type variable magnetic flux reluctance motor, which comprises a DC input end, an inverter circuit, a resonance capacitor, a transmitting coil, a receiving coil, a rectification filter circuit and a motor DC winding; the inverter circuit is connected with an external DC power supply, and the DC power supply is inverted into high-frequency AC power of a set frequency through the inverter circuit, high-frequency current is generated in the transmitting coil and the resonance capacitor element, the high-frequency current generates a high-frequency magnetic field through the transmitting coil, then the high-frequency magnetic field transmits energy to the receiving coil and the resonance capacitor, and the DC winding of the backward motor is powered through the rectification filter circuit and the DC winding. The rotor wireless excitation type variable magnetic flux reluctance motor has the beneficial effects that the DC winding is placed on the rotor, the mutual interference of the magnetic fields in the motor is reduced, the core loss is lower, the heating and heat dissipation are more uniform, and when the number of rotor poles is odd, the electromagnetic force balance can be ensured and the torque density of the motor is increased by adjusting the rotor DC current according to the actual situation.

The present invention provides an electric motor allowing stable drive control to be performed even when, in multipole motors, a resolver is used in a position sensor and combinations are realized in which the pole number ratio between the number of poles in the electric motor and the number of poles in the resolver is an indivisible non-integer multiple. This electric motor is characterized in that: said electric motor comprises an electric motor body, a position sensor that detects the position of a rotor of the electric motor body, and a control device that controls driving of the electric motor body; the control device includes a vector control unit that calculates a voltage command value on the basis of information on current flowing in the electric motor body and information on the position of the rotor detected by the position sensor, and an electrical angle phase calculation unit that calculates the electrical angle phase of the electric motor body; the electrical angle phase conversion unit includes an electrical angle conversion unit that converts sensor phase information, which is phase information for the motor body as acquired from the position sensor, into electrical angle phase information, which is phase information for the electrical angle of the rotor, in accordance with the pole number ratio, which is the ratio of the number of rotor poles, which is the number of poles of the rotor, and the number of position sensor poles, which is the number of poles of the position sensor, and outputs the electrical angle phase information, a rotor phase estimation unit that estimates the phase information of the electrical angle of the rotor and outputs the resulting estimate as a position estimation result, a phase correction amount calculation unit that calculates a phase correction amount according to the sensor phase information and the position estimation result, and a phase correction amount addition unit that generates corrected electrical angle phase information according to the value obtained by adding the phase correction amount to the electrical angle phase information; and the phase correction amount calculation unit calculates an initial phase correction amount according to the position estimation result for when the position sensor outputs 0-degree-phase information as the sensor phase information, calculates, once the initial phase correction amount has been calculated, a correction unit amount whereby 1 is added when the sensor phase information outputted by the phase sensor when the initial value is 0 has changed from 360 degrees to 0 degrees and 1 is subtracted when the sensor phase information outputted by the phase sensor when the initial value is 0 has changed from 0 degrees to 360 degrees, calculates a unit correction amount, which is the value obtained by multiplying the pole number ratio decimal value by 360 degrees, said pole number ratio decimal value being the value of the pole number ratio after the decimal point, and calculates as the phase correction amount a value obtained by multiplying the unit correction amount by the correction unit number and adding the resulting product to the initial phase correction amount.

The invention relates to an electric motor for a steering system of a motor vehicle and to a steering system for a motor vehicle, having a stator and a rotor mounted in the stator so as to be rotatable about a rotor axis. In order to realize improved use options and adaptation convenience, the invention provides that the number of stator teeth is 12 or a multiple of 12; the number of poles is 8 or a multiple of 8; the ratio of the magnet thickness to the magnet width is between 0.2 and 0.3; the ratio of the width of the stator gap to the width of the stator tooth is between 0.3 and 0.4; the ratio of the inner diameter of the stator to the outer diameter of the stator is between 0.45 and 0.55; the ratio of the inner diameter of the stator to the width of the air gap is between 45 and 55; the ratio of the magnet angle to the polar angle is between 0.85 and 0.95; the ratio of the outer radius of the magnet to the diameter of the rotor is between 0.2 and 0.3; the ratio of the thickness of the stator magnet yoke to the width of the stator teeth is between 0.65 and 0.75.

The invention relates to an electric machine (1) for driving a rail vehicle. The invention relates to a motor comprising a closed active arrangement (3) which is arranged in a housing (2) and has a stator (4) and a rotor (5). An external cooling path (6) is provided for conducting cooling air drawn in from the environment (U) outside the closed active arrangement (3), and an internal cooling path (7) is provided for conducting cooling air inside the closed active arrangement (3). The rotor (5) has a number (N) of magnetic poles (P), each of which is formed by two permanent magnets (11) arranged in a V-shape. The rotor (5) has, for each magnetic pole (P), at least one cooling hole (13) axially penetrating the rotor lamination stack (8), through which cooling hole the internal cooling path (7) passes. According to the invention, the ratio of the intermediate angle (WZ) to the polar angle (WP) is in the range of 0.2 to 0.4, the polar angle (WP) representing the angular range covered by the permanent magnets (11) of one magnetic pole (P), and the intermediate angle (WZ) representing the angular range extending between the polar angles (WP) of adjacent magnetic poles (P). Furthermore, the ratio of the hole angle (WL) to the polar angle (WP) is in the range of 0.925 to 1.075, where the hole angle (WL) represents the angular range covered by the two cooling holes (13). As a result, optimization of the electric machine (1) in terms of energy efficiency, noise emission, production costs and in particular cooling behavior is provided for the operating condition behavior of the rail vehicle.

This application relates to a hybrid layer winding structure, a stator assembly, and a motor. The stator assembly has 2p poles, and the core has Z stator slots evenly spaced circumferentially, where Z = 18p. Every three stator slots form a group. The two stator slots on either side are sequentially arranged with slot layers 1, 2, ..., (m+1), and the stator slot in the middle is sequentially arranged with slot layers 1, 2, ..., m, where m is an even number not less than 4. Each phase winding circuit includes n parallel winding branches, and each winding branch includes several lapped coils. The lapped coils are arranged in m / 2+1 cross-layer configurations. The hybrid layer winding structure provided by this application can improve the peak power of the motor at high speeds, increase the area of ​​the motor's high-efficiency range, and significantly reduce the proportion of back EMF harmonics, thereby effectively improving the problem of low power density or low torque density in the motor.

This application relates to an odd-even layer winding structure, a stator assembly, and a motor. The stator assembly has 2p poles, and the stator core has Z stator slots. Within these Z slots, every three slots form a group. In each group, the left and middle slots are sequentially arranged with slot layers L1, L2…Lm-1, and the right slot is also sequentially arranged with slot layers L1, L2…Lm. The odd-even layer winding structure includes three phases of winding lines. Each phase includes n winding branches, and each branch includes several hairpin coils. The hairpin coils are configured with m / 2+1 different layer crossing methods: crossing slot layers L1 and L2, L3 and L4…Lm-1 and Lm, and Lm-1 and Lm-1. The odd-even layer winding structure provided by this application can effectively improve the motor's peak power, high-efficiency area ratio, and maximum efficiency.

The present disclosure relates to a brushless motor and a manufacturing method and device thereof, wherein the brushless motor comprises: at least one stator core (1) comprising a plurality of tooth groups (11) arranged at intervals along the circumferential direction, the total number of tooth groups (11) being Z; a rotor (2) rotatable relative to the stator core (1), the rotor (2) comprising a magnetic ring (21) with a pole number P, P being an even number; and at least two phase conductors (3) wound on the tooth groups (11) to form coils (31) on the tooth groups (11), the total number of phase conductors (3) being X, each phase conductor (3) having an independent first end and a second end; for the same phase conductor (3), the number of tooth groups (11) spaced between the coils (31) on the adjacent two tooth groups (11) is X-1, and the winding directions of the coils (31) on the adjacent two tooth groups (11) along the circumferential direction of the tooth groups (11) are opposite; wherein Z=P*X.

The application relates to the technical field of motors, in particular to a motor rotor punching sheet design method and a motor rotor punching sheet. The motor rotor punching sheet design method comprises the following steps: S1, setting the number m of modulation hollow structures on the motor rotor punching sheet; S2, setting a first slope value k and a second slope value -k; S3, determining the expression of a plurality of first inclined lines and the expression of a plurality of second inclined lines; S4, solving the numerical value; S5, converting the numerical value from the electrical period radian to the mechanical radian according to the motor pole number; S6, judging whether the width of the modulation hollow structure under the corresponding mechanical radian satisfies the punching requirement; if yes, the next step is performed; S7, judging whether the magnetic field harmonic of the motor rotor composed of the motor rotor punching sheet satisfies the requirement; if yes, the design is completed. The motor rotor punching sheet design method can improve the air gap magnetic flux density sinusoidal degree of the motor rotor punching sheet, thereby facilitating the motor to realize high efficiency, low fluctuation and low electromagnetic noise.

The invention discloses a motor, a compressor and refrigeration equipment, and relates to the technical field of refrigeration equipment, the motor comprises a rotor and a stator, and the number of poles of the rotor is p; the residual magnetism of the permanent magnets is Br, and the sum of the cross sectional areas, perpendicular to the axial direction of the rotor, of all the permanent magnets under each magnetic pole is S; the stator comprises a plurality of laminated stator punching sheets, the stator punching sheets are made of an amorphous alloy material, the lamination coefficient of the stator is F, and the thickness of the stator punching sheets is h; the stator punching sheet comprises a stator yoke part and a plurality of stator tooth parts arranged on the inner side of the stator yoke part, stator grooves are formed between adjacent stator tooth parts, the width of the stator tooth parts in the circumferential direction is w1, and the number of the stator grooves is a. According to the scheme, the width of the stator tooth part is designed according to the thickness of the stator punching sheet made of the single amorphous alloy material, and the flux density of the motor is below the saturation point of the amorphous alloy material through the related constraint parameter relation, so that the energy efficiency reduction of the motor caused by oversaturation is avoided.

The application discloses a generator with constant-speed frequency modulation function, which comprises a stator and a rotor, the stator comprises a stator core, a first winding and a second winding, the first winding and the second winding are both wound on the stator core, the second winding is closer to the rotor in the radial direction of the stator than the first winding, the rotor comprises a rotating shaft, a first rotor magnetic pole group and a second rotor magnetic pole group arranged in the circumferential direction of the rotating shaft, the second rotor magnetic pole group is closer to the stator in the radial direction of the rotor than the first rotor magnetic pole group, the polarity of the magnets constituting the first rotor magnetic pole group and the second rotor magnetic pole group changes alternately in the respective circumferential directions, the pole number of the first rotor magnetic pole group and the second rotor magnetic pole group is different, the pole number of the first rotor magnetic pole group is the same as that of the first winding, and the pole number of the second rotor magnetic pole group is the same as that of the second winding. The application can realize variable frequency output under constant rotating speed without adopting power power electronic devices frequency conversion.

A flux concentrate type motor includes a rotor core including an inner diameter portion core, a plurality of outer diameter portion cores, and a plurality of bridges connecting the plurality of outer diameter portion cores to the inner diameter portion core; and a plurality of arc type permanent magnets each inserted between two adjacent outer diameter portion cores. A first angle θ1 formed between a first extension line connecting a center of the arc type permanent magnet and a center of the inner diameter portion core and a second extension line connecting a center of an outer arc of the outer diameter portion core and the center of the inner diameter portion core may satisfy: θ1=k1×PA (k1 is 0.16 to 0.55, and PA=360° / (2×P(a number of pole of the permanent magnet)), where the first angle θ1 may be between 4° and 10°.

The invention provides a motor, a compressor and an air conditioner, the motor comprises a stator, a rotor and a stator winding, and the wiring mode of the stator winding can be switched between a star connection wiring mode and an angle connection wiring mode; the stator is provided with stator teeth which are uniformly arranged along the circumferential direction, the stator winding comprises coil windings which are wound on the stator teeth, and each coil winding is provided with N turns of coils which are connected in series; the motor is a three-phase motor, m parallel branches are arranged in a single-phase stator winding of the motor, and if no parallel branch exists in the single-phase stator winding of the motor, m is equal to 1; the number of poles of the rotor is P, the width of magnetic steel in a single magnetic pole of the rotor is W, the thickness of the magnetic steel is D, and the axial height of the magnetic steel is H; 0.5 < = N * N / m / m / (W * D * H * P) < = 1.2, and the units of W, D and H are millimeter. According to the invention, the rotating speed fluctuation of the motor adopting the winding cutting technology can be reduced, and the motor efficiency is improved.

The invention discloses a motor, a compressor and refrigeration equipment, and relates to the technical field of motors, the motor comprises a stator and a rotor, the stator comprises a stator iron core and a winding, the stator iron core comprises a stator yoke and a plurality of stator teeth, the stator yoke is annularly arranged, the minimum inner circle contour radius of the stator iron core is R2, and the winding is arranged in the stator yoke. The stator teeth are arranged at intervals along the circumferential direction of the inner ring surface of the stator yoke, so that a stator slot is formed between any two adjacent stator teeth, the winding is wound on the stator teeth, the number of the stator slots is Q, and the length of the stator slots is H; the rotor is rotatably arranged in the stator, the number of poles of the rotor is P, the largest common divisor of Q and P is X, and (H * X2-60X) / 2R2 is set to be larger than or equal to 0.4 and smaller than or equal to 1.3; according to the technical scheme, the slot fullness rate can be improved, and the power density of the motor is improved.

The invention provides a stator of a flat wire motor. The stator comprises a stator core and a three-phase winding, the stator core is provided with a plurality of stator grooves which are spaced in the circumferential direction. The three-phase winding is arranged in the stator slot in a penetrating manner; the layer number of flat wires of the stator winding is 2n or 2n-1; for each phase winding, the n layers of windings close to the inner circle of the stator and the other layers of windings are staggered by one stator slot; wherein the distance spanned between the conductors in the two stator slots of the adjacent layer windings without staggered stator slots is an integral distance; the distance between the conductors in the two stator slots of the adjacent layer windings staggered by one stator slot is a short distance; the total number of parallel branches of each phase of winding can be a divisor of P / 2, and P is the number of poles of the flat wire motor; on each parallel branch, the windings on the same layer are mutually staggered in different stator slots, and the number of the leading windings is equal to the number of the lagging windings. The method is suitable for multiple winding layer numbers and different parallel branch numbers, proper parameters are matched for the power performance of the motor, and the operation efficiency and adaptability of the motor are improved.

The invention discloses a stator and rotor punching sheet, a motor, a compressor and an air conditioner, and the stator and rotor punching sheet comprises a rotor punching sheet which is provided with a plurality of magnet grooves suitable for accommodating magnetic parts, and the plurality of magnet grooves are arranged at intervals in the circumferential direction of the rotor punching sheet; wherein the sum of the groove areas of the plurality of magnet grooves is S1, the outer diameter of the rotor punching sheet is D1, and the number of poles of the rotor punching sheet is P. The stator and rotor punching sheet provided by the embodiment of the invention has the characteristic of high rotational inertia of a rotor, so that low-frequency stable operation is realized.

By appropriately setting the circumferential angle of the region from the start point to the end point of the ribs formed on the motor housing, both axial and circumferential vibrations of the electric motor are reduced. [Solution] An electric compressor is provided comprising a motor housing 10 and a motor, wherein the motor has a stator fixed inside the motor housing and a rotor positioned on the inner circumference side of the stator, and a rib 10b is formed on the outer circumferential surface 10a of the motor housing 10 so as to extend in a direction inclined at a predetermined angle α from the direction along the axis X and to pivot in the circumferential direction CD about the axis X, and when the angle θ is the angle obtained by dividing 360 degrees of one rotation of the circumferential direction CD by the greatest common divisor of the number of slots of the stator and the number of poles of the rotor, the angle φ of the circumferential direction CD in the region from the starting point 10b1 to the ending point 10b2 of the rib 10b is set to be greater than 0.5θ and less than 1.5θ.

A rotor arrangement (50) comprises a rotor core (52), first permanent magnets (71) and second permanent magnets (72), wherein the first permanent magnets (71) have a first magnetic material with a first magnetic coercive field strength and the second permanent magnets (72) have a second magnetic material with a second magnetic coercive field strength, wherein the first magnetic coercive field strength is higher than the second magnetic coercive field strength, wherein the rotor arrangement (50) alternately comprises two adjacent first pole regions (68, 61; 64, 65) with the first permanent magnets (71) and two adjacent second pole regions (62, 63; 66, 67) with the second permanent magnets (72), wherein the two adjacent first pole regions (68, 61;64, 65) are magnetized oppositely to each other in order to enable a first number of poles of the rotor arrangement (50) by remagnetizing the second pole regions (62, 63, 66, 67) opposite to the respective adjacent first pole region (68, 61, 64, 65) and to enable a second number of poles of the rotor arrangement (50) by remagnetizing the second pole regions (62, 63, 66, 67) in accordance with the respective adjacent first pole region (68, 61, 64, 65), wherein the first number of poles is twice as large as the second number of poles.;