Patent Description:
The traditional permanent magnet motor can be divided into internal rotor motor and external rotor motor according to the position of the rotor, wherein the rotor is arranged in the circular zone of stators in an internal rotor motor, and the rotor is arranged outside the stators in an external rotor motor. In a traditional permanent magnet motor, the windings on the stator are energized and automatically commutated under the action of magnetic induction hall or magnetic induction coil, which generates a rotating magnetic field of magnetic induction line and drives the rotor to rotate.

When the stator of a traditional permanent magnet motor is energized, only one side of the magnetic field generated by the winding has an effect on the rotor, while the magnetic field on the other side cannot have an effect on the rotor, resulting in a waste of energy. <CIT>discloses a double-rotor motor, in which a stator and a rotor are arranged. A stator core of the stator is a cylinder structure with an opening. The inner surface of the stator core is wound with at least two-phase windings. The rotor comprises a double layer, cylindrical yoke steel sleeve with another opening. The outer surface of the steel sleeve provides an inner rotor magnet and the inner surface of the outer layer of the yoke outer sleeve is provided with an outer rotor magnet. The first end of the stator core is inserted through the inner surface of the yoke The second end is inserted between the inner layer and the outer layer so that the stator core is located between the inner rotor magnet and the outer rotor magnet. The inner magnetic steel pole-plates and the outer magnetic steel pole-plate are directly opposed to each other, and the polarities of the two are the same. <CIT> discloses an embodiment for modular-pole double-sided electrical machines with yokeless stators that are particularly useful for direct-drive or medium-speed geared wind turbines and ship propulsion motors. The stator includes a plurality of stator tooth modules configured for radial magnetic flux flow. The stator tooth modules, in which one or more coils are wound around a respective modular lamination stack. The Coils have one or more leads which extend out from the coil. Each stator tooth module includes stack compression bolts and nuts for compressing the modular I-shaped lamination stack, and conductor wire. The stator tooth modules include at least one end plate, and the end plates have extensions for mounting onto a stator frame. The stator is concentrically disposed in relation to the rotor of the electrical machine. <CIT> discloses a brushless direct-current motor comprising a double rotor with an inner rotor and an outer rotor in which magnets consisting of opposite polarity are alternately arranged at opposite positions of the inner rotor and the outer rotor facing each other. The stator having split cores that are disposed between the inner rotor and the outer rotor, and on which coils of three phases are connected and wound in a three-phase drive method, wherein the split cores comprising core groups in which the coils are wound on three consecutive split cores in sequence of a forward direction, while the three consecutive split cores generate magnetic flux in opposite directions to each other.

To overcome the defects of the existing technology, the technical problem to be resolved in the present invention is: how to use the magnetic fields on both sides of the stator winding to drive the rotor. A solution to this technical object is defined in claim <NUM>.

To achieve this, the present invention adopts the following technical scheme:
The new type of mixed-wave permanent magnet energy-saving motor comprises a motor shell, a stator and a rotor, wherein the stator comprises a plurality of circularly distributed stator cores, and the stator cores are wound with magnetic induction lines passing through the coils at both sides thereof; the rotor comprises an outer rotor part, inner outer part and a flange; the external rotor part is arranged outside the cylindrical inner rotor part, a stator zone is formed between the outer rotor part and the inner rotor part, the stator is arranged in the stator zone of rotor, and the outer rotor part and the inner rotor part are connected by flange; the inner side of the outer rotor part and the outer side of the inner rotor part are provided with a plurality of circularly distributed permanent magnet modules, and two adjacent permanent magnet modules have opposite polarity.

Beneficially or exemplarily, the stator also includes a fixing ring on which a plurality of the stator iron cores are distributed, and the stator also comprises a fixing support for fixing the stator iron cores on the fixing ring; the stator iron cores are a I-shaped structure, which comprises a first arch part, a second arch part and a middle part connecting the first arch part and the second arch part, the coils are winding on the middle part with slots on both sides, the first arch part faces towards the outer rotor part, and the second arch part faces towards the inner rotor part; a fixing hole of the first arch part vertically runs through the first arch part, and the fixing support is fixedly connected to the fixing ring after passing through the fixing hole.

According to the invention, each of the permanent magnet modules comprises a plurality of permanent magnets, wherein the permanent magnets of each permanent magnet module of the inner rotor part are vertically mounted along the outer side of the inner rotor part and the permanent magnets of the outer rotor part are inclinedly mounted along the inner side of the outer rotor part.

According to the invention, each of the permanent magnet modules includes a plurality of permanent magnets, wherein the permanent magnets of each permanent magnet module of the inner rotor part are inclinedly mounted along the outer side of the inner rotor part and the permanent magnets of the outer rotor part is vertically mounted along the inner side of the outer part.

Beneficially or exemplarily, the angle of inclination of the inclinedly mounted permanent magnets of is <NUM> to <NUM> degrees.

Beneficially or exemplarily, the permanent magnet modules of the inner rotor part and the outer rotor part have corresponding position and identical quantity, and the permanent magnet modules at the corresponding positions of the inner rotor part and the outer rotor part have opposite polarity facing towards the stator zone.

The scope of the claims does not comprise a plurality of permanent magnets of the permanent magnet module of the inner rotor part are vertically mounted along the outer side of the inner rotor part, and a plurality of permanent magnets of the permanent magnet module of the outer rotor part are vertically mounted along the inner side of the outer rotor part.

Beneficially or exemplary, it also includes a rotating shaft connected to the inner rotor part through the frontend cover and connected to the frontend cover by rotation of a bearing, and the stator is fixedly mounted on the frontend cover.

The beneficial effect of the present invention:
By designing the structure of the stator and rotor, the present invention makes full use of the magnetic field on both sides of the stator acting with the inner rotor part and the outer rotor part, and the overall output power of the motor is equal to the sum of the powers of the inner rotor part and the outer rotor part, making full use of the magnetic field on both sides of the stator and avoiding the waste of energy.

In the drawing:
<NUM>-motor shell; <NUM>-stator; <NUM>-fixing ring; <NUM>-stator iron core; <NUM>-frist arch part; <NUM>-second arch part; <NUM>-middle part; <NUM>-fixing hole; <NUM>-coil; <NUM>-fixing support; <NUM>-rotor; <NUM>-outer rotor part; <NUM>-inner rotor part; <NUM>-flange; <NUM>-rotating shaft; <NUM>-permanent magnet module; <NUM>-stator zone; <NUM>-frontend cover; <NUM>-rear end cover.

In <FIG>, the structural relationship between stator <NUM> and rotor <NUM> is shown from a sectional view, and stator <NUM> is located between the outer rotor part <NUM> and the inner rotor part <NUM> of rotor <NUM>. <FIG> shows the overall picture of the motor. <FIG> show the structural relationship of each component of stator <NUM> from different angles. <FIG> shows the distribution relationship of stator iron cores <NUM> in the stator <NUM>. <FIG> shows the structural relationship of each component in the rotor <NUM>. <FIG> shows the structure of the rotor of a mixed-wave motor, the permanent magnet modules <NUM> of the outer rotor part <NUM> are inclinedly mounted along the side thereof, and the permanent magnet modules <NUM> of the inner rotor part <NUM> are vertically mounted along the side thereof. <FIG> shows the structural relationship between stator <NUM> and rotor <NUM> in three dimensions. <FIG> shows the structural relationship between stator <NUM> and rotor <NUM> from another sectional view. <FIG> shows the direction of the magnetic induction lines of the permanent magnet modules <NUM> on the inner rotor part <NUM> and the outer rotor part <NUM> of rotor <NUM>. <FIG> show the structure of the rotor in different embodiments of the present invention, wherein <FIG> shows the structure of the rotor of a mixed-wave motor. <FIG> shows the structure of the rotor of a square-wave motor, and <FIG> shows the structure of the rotor of a sinusoidal-wave motor that are not encompassed by the invention. <FIG> shows the structure of the fixing support <NUM> for fixing stator <NUM> to frontend cover <NUM>. <FIG> shows the structure of the frontend cover <NUM> in <FIG> from another view. <FIG> shows the structure of frontend cover <NUM> fixing the stator <NUM> in <FIG>. <FIG> shows the direction of the magnetic induction line of the coils <NUM> on the stator <NUM>, wherein each coil <NUM> acts as a separate magnet emitting magnetic induction lines towards two radial sides of the stator iron core <NUM>.

The technical scheme of the present invention is further explained in combination with the attached drawings and through specific embodiments below.

The new type of mixed-wave permanent magnet energy-saving motor in the embodiment comprises a motor shell <NUM>, a stator <NUM> and a rotor <NUM>, and the stator <NUM> and the rotor <NUM> are arranged in the motor shell <NUM>, wherein the stator <NUM> includes a plurality of circularly distributed stator iron cores <NUM>, and the stator cores <NUM> are wound with magnetic induction lines passing through the coils <NUM> at both radial sides thereof; the rotor <NUM> includes an outer rotor part <NUM>, an inner rotor part <NUM> and a flange <NUM>; the circular outer rotor part <NUM> is arranged outside the cylindrical inner rotor part <NUM>, a stator zone <NUM> is formed between the outer rotor part <NUM> and the inner rotor part <NUM>, the stator <NUM> is arranged in the stator zone <NUM> of the rotor <NUM>, and the outer rotor part <NUM> and the inner rotor part <NUM> are connected by flange <NUM>; the inner side of the outer rotor part <NUM> and the outer side of the inner rotor part <NUM> are provided with a plurality of circularly distributed permanent magnet modules <NUM>, and two adjacent permanent magnet modules <NUM> have opposite polarity.

There are various winding modes on stator iron cores, and the ratio of the coils <NUM> and the permanent magnet module <NUM> is the same as that of an ordinary motor. In an embodiment, the quantity ratio of the permanent magnet module <NUM> of the outer rotor part <NUM>, the coil <NUM> and the permanent magnet module <NUM> of the inner rotor part <NUM> is <NUM>:<NUM>:<NUM>. The quantity ratio may change in other embodiments.

The permanent magnet energy-saving motor in the embodiment can be used as an electric motor and can also be used an electric generator.

When used as an electric motor, the coil <NUM> of the stator iron core <NUM> is supplied with a three-phase current. Since the stator iron core <NUM> is made of magnetic material, after the coil <NUM> of the stator iron core <NUM> is energized, the magnetic induction line of the coil <NUM> can pass through both radial sides of the stator iron core <NUM>, and meanwhile the outer rotor part <NUM> and the inner rotor part <NUM> are respectively arranged at both radial sides of the stator iron core <NUM>, thus the magnetic induction line generated by the coil <NUM> acts on the outer rotor part <NUM> and the inner rotor part <NUM> from both radial sides. At this moment, each stator iron core <NUM> forms a separate magnet, which generates a magnetic field with different phases, wherein the north pole and the south pole are respectively at both radial sides of the stator iron core and respectively face towards the outer rotor part <NUM> and the inner rotor part <NUM>, the direction and the intensity of the magnetic field generated by the coil <NUM> on the stator iron core <NUM> change with time, and the coils <NUM> of two adjacent stator iron cores <NUM> have different phases.

When the three-phase current changes, the magnetic field of the stator iron core <NUM> changes, the stator <NUM> forms a rotating magnetic field to drive the outer rotor part <NUM> and the inner rotor part <NUM> provided with permanent magnet module <NUM> to rotate.

<FIG> shows the direction of the magnetic induction line of permanent magnet module <NUM> in an embodiment.

When used as a motor, there are two functions that increase the output power of rotor <NUM>.

First, as described above, since the magnetic induction line passes through the two radial sides of the stator iron core <NUM>, the magnetic induction line of the coil <NUM> is fully utilized; the rotating magnetic field drives the inner rotor part <NUM> and the outer rotor part <NUM> to rotate simultaneously, and the output power of the rotor <NUM> is the sum of the output power of the inner rotor part <NUM> and the outer rotor part <NUM>.

Second, within a certain range of angles, the magnetic induction line of the inner rotor part <NUM> can enhance the magnetic field generated by the stator iron core <NUM>, thus increasing the force of the magnetic field on the outer rotor part <NUM>. Specifically, when rotor <NUM> rotates within a certain angle range, the stator core <NUM> with good magnetic permeability is affected by the magnetic induction line of permanent magnet module <NUM> of inner rotor part <NUM>, which generates an induced magnetic field. Within this specific angle range, the induced magnetic field generated by stator core <NUM> is in the same direction as the magnetic field generated by coil <NUM>. At this point, the two magnetic fields are superimposed, and the magnetic field intensity generated on the stator core <NUM> is equal to the sum of the rotating magnetic field of coil <NUM> and the induced magnetic field of stator core <NUM>. As a result, the magnetic field generated on the stator core <NUM> is strengthened, leading to the strengthening of the magnetic field acting on the outer rotor part <NUM>, thereby increasing the acting force on the outer rotor part <NUM>. Similarly, within another specific angle range, the magnetic induction line of the outer rotor part <NUM> can also enhance the magnetic field generated on the stator core <NUM>, thus enhancing the force exerted by the magnetic field on the inner rotor part <NUM>. In an implementation mode, the period of the three-phase current is adjusted adaptively to obtain the specific angle.

The conditions of obtaining this specific angle: The induction magnetic field generated by the stator core <NUM> via the permanent magnet module <NUM> is in the same direction as the rotating magnetic field of the coil <NUM>.

Taking the rotating magnetic field of coil <NUM> on a stator core <NUM> enhanced by inner rotor part <NUM> as an example, the occurrence of one of the specific angles is described: The directional strength of magnetic field on a certain coil <NUM> varies with time. During a certain period of time, coil <NUM> on a certain stator core <NUM> generates a magnetic field in one direction. At the same time, one of the permanent magnet modules with inner rotor part <NUM> generates a magnetic induction line in a direction opposite to that of coil <NUM> toward stator zone <NUM>. When the permanent magnet module <NUM> rotates from one side of the stator core <NUM> to the position of the opposite stator core <NUM>, the magnetic flux on the stator core <NUM> increases slightly, so the induction magnetic field of the stator core <NUM> is opposite to the magnetic field of the permanent magnet module <NUM>. At this point, the direction of the induced magnetic field generated is the same as that of the magnetic induction line of coil <NUM>, thus enhancing the rotating magnetic field of coil <NUM>. In the actual situation, the magnetic field of coil <NUM> can be effectively enhanced with more positions meeting the occurrence conditions of this particular angle.

Above two actions coordinate with each other, increasing the output power of rotor <NUM>.

Compared with traditional motor, through the structural design of stator <NUM> and rotor <NUM> in the embodiment, each stator iron core <NUM> of the stator <NUM> is used as a separate magnet winding, thus utilizing the magnetic fields on both sides of the separate electromagnetic windings to drive the outer rotor part <NUM> and the inner rotor part <NUM> of rotor <NUM>. In other words, the magnetic fields of stator <NUM> are used to drive inner rotor part <NUM> and outer rotor part <NUM>, the overall output power of rotor <NUM> is equal to the sum of the output power of inner rotor part <NUM> and outer rotor part <NUM>, which makes full use of the magnetic field on both sides of stator <NUM> and avoids energy waste. Compared with the traditional motor, the present invention uses fewer winding sets to realize the same power, thus reducing size of stator <NUM>, using fewer winding materials, and realizing higher economic benefit.

When used as a generator, since the stator iron core is made of magnetic material, the magnetic induction lines of the permanent magnet module <NUM> of the inner rotor part <NUM> and the outer rotor part <NUM> can act on the coil <NUM> through the radial sides of the stator core <NUM>. At this time, when the rotor <NUM> rotates, the permanent magnet module <NUM> thereof rotates to form a rotating magnetic field, and the coil <NUM> on stator <NUM> generates electromagnetic induction, generating electrodynamic force and outputting electric energy.

Compared with a traditional generator, the coil <NUM> of stator <NUM> in the embodiment is affected by the magnetic induction line of the permanent magnet module <NUM> of outer rotor part <NUM> and the magnetic induction line of the permanent magnet module <NUM> of inner rotor part <NUM>, and the flux of coil <NUM> on stator <NUM> changes more, generating more electrodynamic force.

As shown in <FIG>, a fixing method of stator <NUM> of a new mixed-wave permanent magnet energy-saving motor is provided in the embodiment. The stator <NUM> further comprises a fixing ring <NUM>, a plurality of stator iron cores <NUM> and a fixing support <NUM>, wherein the stator iron cores <NUM> are circularly distributed on the fixing ring <NUM>, and the fixing support <NUM> is used for fixing the stator iron cores <NUM> on the fixing ring <NUM>.

The stator iron core <NUM> in an embodiment is an I-shaped structure, comprising a first arch part <NUM>, a second arch part <NUM> and a middle part <NUM>, wherein the middle part <NUM> connects the first arch part <NUM> and the second arch part <NUM>, the coil <NUM> is wound on the middle part <NUM> with slots at both sides, the first arch part <NUM> faces towards the outer rotor part <NUM>, and the second arch part <NUM> faces towards the inner rotor part <NUM>.

In a further implementation, a fixing hole <NUM> of the first arch part <NUM> is vertically runs through the first arch part <NUM>, and the fixing support <NUM> is fixedly connected to the fixing ring <NUM> after passing through the fixing hole <NUM>, to maintain the relative position of the stator iron cores <NUM>. Preferably, two fixing rings <NUM> are set, the stator iron core <NUM> is fixed between the two fixing rings <NUM>, and one end of the fixing support <NUM> penetrates into the fixing hole <NUM> from one side of fixing ring <NUM>, going further to extend towards the other fixing ring <NUM> and to be fixedly connected to the fixing ring <NUM>. Further, the other end of the fixing support <NUM> is fixed on the frontend cover <NUM>, which is opposite to the backend cover <NUM> and is arranged on both sides of the motor shell <NUM> respectively.

As shown in <FIG>, the embodiment provides a new type of mixed-wave permanent magnet energy-saving motor, which can send out mixed waves. <FIG> shows the structure of the rotor of a mixed-wave motor, and each permanent magnet module <NUM> includes a plurality of permanent magnets, wherein the permanent magnets of the permanent magnet module <NUM> of the inner rotor part <NUM> are vertically mounted along the outer side of the inner rotor part, and the permanent magnets of the permanent magnet module <NUM> of the outer rotor part <NUM> are inclinedly mounted along the inner side of the outer rotor part. Or, <FIG> shows the structure of the rotor of another mixed-wave motor, wherein the permanent magnets of the permanent magnet module <NUM> of the inner rotor part <NUM> are inclinedly mounted along the outer side of the inner rotor part, and the permanent magnets of the permanent magnet module <NUM> of the outer rotor part <NUM> are vertically mounted along the inner side of the outer rotor part.

When used as a motor, the working process of the embodiment is similar to that of the above embodiment <NUM>.

When used as a generator, as the embodiment describes in particular, the inclinedly mounted permanent magnet module <NUM> can make stator <NUM> generate sinusoidal-wave alternating current; meanwhile, the vertically mounted permanent magnet module <NUM> can make stator <NUM> generate square-wave alternating current. Thus, the stator <NUM> can generate a mixed wave of sinusoidal wave and square wave, which realizes an output of mixed wave. According to the need, the waveform of alternating current can be selected adaptively to make it suitable for practical application.

In the embodiment, since the output waveform is a mixed wave of sinusoidal wave combined with square wave, the sinusoidal wave controller or square wave controller can be selected when selecting the controller, which improves the applicability of the motor of this embodiment.

Further, the angle of inclination of the inclinedly mounted permanent magnets is <NUM> to <NUM> degrees, preferably to be <NUM> degrees. As shown in <FIG> and <FIG>, the angle of inclination of the inclinedly mounted permanent magnets is <NUM> degrees.

Further, the number of permanent magnet modules <NUM> on the inner rotor part <NUM> and the outer rotor part <NUM> is the same.

The example (not encompassed by the invention) provides a new type of sinusoidal-wave or square-wave permanent magnet energy-saving motor, which can send out sinusoidal wave or square wave. As shown in <FIG> and <FIG>, the permanent magnet modules <NUM> of the inner rotor part <NUM> and the outer rotor part <NUM> have corresponding position and identical quantity, and the permanent magnet modules <NUM> at the corresponding positions of the inner rotor part <NUM> and the outer rotor part <NUM> have opposite polarity facing towards the stator zone.

When used as a motor in the example, the output power of rotor <NUM> can be further enhanced as below:
Since the permanent magnet modules <NUM> at the corresponding positions of the outer rotor part <NUM> and the inner rotor part <NUM> have opposite polarity, and the magnetic induction lines of the permanent magnet module <NUM> of the outer rotor part <NUM> and the inner rotor part <NUM> are mutually constrained, thus constraining most of the magnetic induction lines of the permanent magnet module <NUM> within the corresponding permanent magnet modules <NUM>; therefore, the magnetic induction lines in stator zone <NUM> are more concentrated and the magnetic field is stronger. Therefore, when coil <NUM> is energized and generates a rotating magnetic field, the force exerted by the rotating magnetic field on the permanent magnet module <NUM> on both sides of the rotor is enhanced, thus improving the output power of the rotor.

When used as a generator, it is similar to that used as a motor. There is also the situation that the magnetic induction lines are mutually constrained so that the magnetic induction lines get more concentrated and the output power of generator is enhanced.

In a further example (not encompassed by the claims), <FIG> shows the structure of the rotor of a sinusoidal-wave motor, wherein the permanent magnet modules <NUM> of the inner rotor part <NUM> and the outer rotor part <NUM> are inclinedly mounted along the corresponding side thereof. The permanent magnets of the two parts are preferably to have the same angle of inclination.

In an implementation, the angle of inclination of the inclinedly mounted permanent magnets is <NUM> to <NUM> degrees, preferably to be <NUM> degrees. As shown in <FIG>, the angle of inclination of the permanent magnets is <NUM> degrees.

When used as a motor, the working process of the embodiment is similar to that of the above. When used as a generator, sinusoidal-wave alternating current is generated, and the waveform of the sinusoidal wave of the stator <NUM> is affected by the angle of inclination of the inclinedly mounted permanent magnets of permanent magnet module <NUM>.

According to the actual application, the angle of inclination is selected reasonably.

In another further example (not encompassed by the claims), <FIG> shows the structure of the rotor of a square-wave motor, wherein the permanent magnets of the permanent magnet module <NUM> of the inner rotor part are vertically mounted along the outer side of the inner rotor part, and the permanent magnets of the permanent magnet module <NUM> of the outer rotor part are vertically mounted along the inner side of the outer rotor part.

When used as a motor, the implementation is similar to that of the above. When used as a generator, square-wave alternating current is generated in the implementation.

In the example, when the permanent magnet modules <NUM> are vertically mounted, the motor can be used as a damper motor. When used a damper motor, the permanent magnet modules <NUM> on the inner side of the outer rotor part and the outer side of the inner rotor part <NUM> have corresponding position and identical magnetic field direction. At his time, due to their corresponding positions, the magnetic fields of the permanent magnet module <NUM> of the inner rotor part <NUM> and the permanent magnet module <NUM> of the outer rotor part <NUM> can be superposed directly, so that the magnetic field acting on stator <NUM> is larger than that of one of the permanent magnets mounted inclinedly. When rotor <NUM> rotates, especially between two permanent magnet modules <NUM>, the magnetic flux of coil <NUM> on stator <NUM> changes direction from facing one side to facing the other side, and the numerical value changes greatly, which causes stator <NUM> to generate a great induced electrodynamic force and prevents rotor <NUM> from rotating further.

In this example, similarly, since the two parts of permanent magnet module <NUM> can be superposed. Thus, compared with the traditional damper motor, the induction electrodynamic force generated on stator <NUM> is larger and the damping effect is better.

The embodiment provides a setting method of the rotating shaft of a new type of mixed-wave permanent magnet energy-saving motor, further comprising a rotating shaft <NUM>, wherein the rotating shaft <NUM> is connected to the inner rotor part and is connected to the frontend cover <NUM> through rotation of a bearing after passing through the frontend cover <NUM>, and the stator <NUM> is fixedly mounted on the frontend cover <NUM>.

When a fixing ring <NUM> is mounted on both vertical sides of the stator iron core <NUM>, the fixing ring <NUM> facing towards the frontend cover <NUM> is provided with a hole where the fixing support <NUM> passes through, the fixing support <NUM> passes through the hole and penetrates into the fixing hole <NUM> of the stator iron core <NUM>, and the stator core <NUM> is extended and fixed on the fixed ring <NUM> far from the frontend cover <NUM> of the stator iron core <NUM>.

In this embodiment, a water-cooled heat dissipation structure can be set to dissipate heat from stator <NUM>, whose specific structure is similar to that disclosed by <CIT>.

Claim 1:
A mixed-wave permanent magnet motor, comprising a motor shell (<NUM>), a stator (<NUM>) and a rotor (<NUM>), wherein, the stator (<NUM>) and the rotor (<NUM>) are arranged in the motor shell (<NUM>);
wherein the stator (<NUM>) comprises a plurality of circularly distributed stator cores (<NUM>), and the stator cores (<NUM>) are wound with magnetic induction lines passing through the coils (<NUM>) at both radial sides thereof; wherein the rotor (<NUM>) comprises an outer rotor part (<NUM>), an inner rotor part (<NUM>) and a flange (<NUM>); wherein the outer rotor part (<NUM>) is arranged outside the cylindrical inner rotor part (<NUM>), a stator zone (<NUM>) is formed between the outer rotor part (<NUM>) and the inner rotor part (<NUM>), the stator (<NUM>) is arranged in the stator zone (<NUM>) of the rotor (<NUM>), and the outer rotor part (<NUM>) and the inner rotor part (<NUM>) are connected by a flange (<NUM>);
wherein a plurality of permanent magnet modules (<NUM>) is circularly distributed on the inner side of the outer rotor part (<NUM>) and the outer side of the inner rotor part (<NUM>), and two adjacent permanent magnet modules (<NUM>) have opposite polarity, characterized in that each permanent magnet module (<NUM>) comprises a plurality of permanent magnets, wherein the permanent magnets of each permanent magnet module (<NUM>) of the inner rotor part (<NUM>) are vertically mounted along the outer side of the inner rotor part (<NUM>), and the permanent magnets of each permanent magnet module (<NUM>) of the outer rotor part (<NUM>) are inclinedly mounted on the inner side of the outer rotor part (<NUM>) or the permanent magnets of each permanent magnet module (<NUM>) of the inner rotor part (<NUM>) are inclinedly mounted on the outer side of the inner rotor part (<NUM>), and the permanent magnets of each permanent magnet module (<NUM>) of the outer rotor part (<NUM>) are vertically mounted on the inner side of the outer rotor part (<NUM>).