CN215344313U - Parallel motor model structure - Google Patents

Abstract

The utility model provides a parallel motor model structure, which comprises a rotor and a stator, wherein the rotor comprises at least two independent coils which are independent from each other; the stator comprises at least one pair of magnet pairs and at least one pair of conductive ring pairs consisting of a positive conductive ring and a negative conductive ring, each pair of magnet pairs comprises a first magnet and a second magnet, and the N pole of the first magnet and the S pole of the second magnet are respectively used for acting on an electrified independent coil; each independent coil is provided with two power connection endpoints, one power connection endpoint is used for being electrically connected with the conductive ring pair, the other power connection endpoint is used for being electrically connected with the conductive ring pair or the grounding electrical ring, and the power connection endpoints electrically connected with the conductive ring pair change the electrically connected conductive rings through the rotation of the rotor; in one rotation period, there is a moment when at least two independent coils are connected in parallel with each other. The parallel motor structure of the scheme can realize parallel connection of all coils, and effectively improves the working efficiency of the motor.

Description

Parallel motor model structure

Technical Field

The utility model belongs to the technical field of motors, and particularly relates to a parallel motor model structure.

Background

The motor comprises a brush motor and a brushless motor, wherein the brush motor is widely used in occasions with low requirements due to the advantages of stable performance, low manufacturing cost and the like.

Under the condition of only one coil, the continuous rotation of the rotating shaft cannot be ensured, so that the current motor adopts a multi-coil mode. However, the existing multi-coil motor has a defect that, for example, the mutual influence relationship exists among the coils, the state of one coil can influence the state of the other coil, and the independence of the coils cannot be ensured; and the parallel operation of the coils cannot be realized. For example, three-coil motors are typical, the coil connections of which include star connections and delta connections, in which there is no possibility of parallel connection at all. In the case of the angle type connection, as shown in fig. 1 and 2, although there is a parallel circuit, when there is only one set of coils connected in parallel at most, for example, when there are two brush contacts A, B, the equivalent circuit is as shown in fig. 2, L2 is connected in series with L3, L1 is connected in parallel with the series circuit of L2 and L3, and the series-parallel relationship between the coils is changed at two points of brush contact B, C and A, C similarly to the equivalent circuit of fig. 2. The applicant finds that the motor of the parallel model has obvious advantages in the aspects of motor performance, torque output and the like compared with the motor of the series model, but the current motor can only realize one group of parallel circuits at most, influence relationships exist among coils, the parallel connection of all the coils cannot be realized, the performance of the motor is influenced, and the motor field is revolutionary if the parallel connection of all the coils can be realized.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the problems and provides a parallel motor model structure and an operation method thereof.

In order to achieve the purpose, the utility model adopts the following technical scheme:

a parallel motor model structure comprises a rotor and a stator, and is characterized in that the rotor comprises at least two independent coils which are independent of each other;

the stator comprises at least one pair of magnet pairs and at least one pair of conductive ring pairs consisting of positive conductive rings and negative conductive rings, each pair of magnet pairs comprises a first magnet and a second magnet, and the N pole of the first magnet and the S pole of the second magnet are respectively used for acting on electrified independent coils;

each independent coil is provided with two power connection endpoints, one power connection endpoint is used for being electrically connected with the conductive ring pair, the other power connection endpoint is used for being electrically connected with the conductive ring pair or the grounding electrical ring, and the power connection endpoints electrically connected with the conductive ring pair change the electrically connected conductive rings through the rotation of the rotor;

and there is a moment when at least two independent coils are connected in parallel with each other in one rotation period.

In the parallel motor model structure, at least three/four/five/six independent coils are connected in parallel in one rotation period;

in each rotation period, the time when at least two/three/four/five/six independent coils are connected in parallel is larger than 1/Z rotation period, and Z is equal to 2, 3, 4 or 5;

the two power connection end points are used for electrically connecting the conductive ring pairs, a positive conductive ring in the conductive ring pairs is used for connecting a positive power supply, and a negative conductive ring in the conductive ring pairs is used for grounding;

or one of the power connection end points is used for electrically connecting the grounding electric ring, the positive conductive ring in the conductive ring pair is used for connecting a positive power supply, and the negative conductive ring is used for connecting a negative power supply;

the electric connection end point is directly or indirectly in sliding contact with the grounding electric ring/conductive ring pair in the rotating process so as to be electrically connected with the grounding electric ring/conductive ring pair.

In the parallel motor model structure, the number of the magnet pairs is consistent with that of the conductive ring pairs, when a plurality of pairs of magnets and a plurality of pairs of conductive rings are provided, the plurality of pairs of magnets are circumferentially distributed in sequence, and the plurality of pairs of conductive rings are circumferentially distributed in sequence;

when the number of the magnet pairs/the conductive ring pairs is one, the coil angle theta is less than or equal to 180 degrees; when the number of the magnet pairs/the conductive ring pairs is more than 1 pair, the relationship between the coil angle theta and the number of the magnet pairs/the conductive ring pairs is as follows:

n is the number of magnet pairs/conductive ring pairs.

In the parallel motor model structure described above, the relationship between the coil angle θ and the number of magnet pairs/conductive ring pairs is:

the central angle alpha of the track formed by the two power connection end points of each independent coil is as follows:

when the number of the magnet pairs/the conductive ring pairs is one pair, alpha is less than or equal to 180,

when the number of the magnet pairs/the conductive ring pairs is more than one pair, alpha is less than 360/N,

and alpha is larger than beta, wherein beta represents the vacant radian between the effective sections of the adjacent conductive rings.

In the parallel motor model structure, the track central angle α is equal to the coil angle θ, or the angle difference between the track central angle α and the coil angle θ is smaller than a preset difference value;

the conducting rings are uniformly distributed in the circumferential direction, and the vacant radians between the effective sections of the adjacent conducting rings are smaller than a set angle;

and the preset difference is 50 degrees, 30 degrees, 20 degrees or 10 degrees;

the set angle is 30 degrees, 20 degrees, 10 degrees or 5 degrees

The utility model has the advantages that:

the conductive ring pairs are used for replacing the brush pairs, the commutator is omitted, the commutator is not required to distribute electrifying time, electrifying and current reversing are realized by the electric connection end points of the independent coils in sliding contact with the conductive ring pairs, and the parallel connection form of all the independent coils can be realized;

all independent coils are mutually independent, the state of any one independent coil cannot influence other independent coils, and the independence of all coils is ensured, so that the stability of output torque is ensured;

under an ideal state, when the radian of the effective section of the conducting ring and the central angle alpha of the track meet certain conditions, all coils can work in full time, and the running efficiency of the motor is improved;

the coils are connected in parallel, so that the loss can be reduced on the premise of ensuring that the torque output is unchanged;

through the independent coil that circumference distribution multiunit is comparatively intensive, make the effort distribution in magnetic field fill the circumference of whole rotor, improve magnetic field force effect, guarantee the output effect, improve work efficiency.

Drawings

FIG. 1 is a prior art three coil motor coil wiring schematic;

FIG. 2 is an equivalent circuit diagram of the three coils of FIG. 1;

FIG. 3 is a schematic view of a pair of conductive rings and magnets angularly offset from a spatial position;

FIG. 4 is a schematic diagram of the independent coils wound on the core according to the present invention;

FIG. 5 is a schematic diagram of a pair of three independent coils of magnetic poles in the present invention;

FIG. 6 is a schematic diagram of three 180-degree independent coil electrical terminals on a pair of conductive rings in accordance with the present invention;

FIG. 7 is a diagram of the motor effect of two sets of 180 degree coils of the present invention;

FIG. 8 is a diagram of another motor effect of the two sets of 180 degree coils of the present invention;

FIG. 9 is a schematic diagram of two pairs of poles with three independent coils according to the present invention;

FIG. 10 is a schematic diagram of three 90-degree independent coil electrical terminals on a pair of conductive rings in accordance with the present invention;

FIG. 11 is a diagram of the motor effect of the 90 degree coil of the present invention;

fig. 12 is an equivalent circuit diagram of a conventional motor;

fig. 13 is an equivalent circuit diagram of the present parallel scheme.

Reference numerals: a magnet pair 1; a first magnet 11; a second magnet 12; a pair of conductive rings 2; a separate coil 3; the power connection terminal 31.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

The embodiment discloses a parallel motor model structure and an operation method thereof, the parallel motor model innovatively improves a traditional motor, a commutator is eliminated, an electric ring pair is used for replacing a traditional electric brush pair, a coil is provided with two electric connection end points, and the electric ring comprises a positive conducting ring and a negative conducting ring; or the electric rings comprise a positive conductive ring, a negative conductive ring and a grounding electric ring. In the coil rotating process, one power connection end point 31 in each independent coil 3 is electrically connected with the positive conducting ring and the negative conducting ring in sequence, and the other power connection end point 31 is electrically connected with the grounding conducting ring all the time to realize coil reversing; or two power connection end points of each independent coil are respectively and sequentially electrically connected with the positive conducting ring and the negative conducting ring to realize coil commutation; each independent coil is electrically connected to the electrical loop independently of the other so that each energized independent coil is connected in parallel.

The electric connection end point is directly or indirectly in sliding contact with the grounding electric ring/conductive ring pair in the rotating process so as to be electrically connected with the grounding electric ring/conductive ring pair;

the technical personnel in the field receive the inspiration of this application can combine together this application and prior art's motor coil setting mode, if with partial coil series connection, partial coil independent setting, or will be established ties the series connection coil that forms by the multiunit coil and regard as independent coil, then with modes such as independent coil each other parallelly connected, no matter which kind of mode, as long as applied this application independent coil each other parallelly connected thinking, all should be in the protection scope of this application. In order to show the superiority of the present invention, the following description will be made in detail by taking an example in which all coils are independently provided. In addition, the electrical connection terminal can directly or indirectly slide in contact with the electrical ring during the rotation process to achieve electrical connection with the electrical ring pair, and direct sliding contact is taken as an example below.

Example one

The embodiment discloses a multi-coil parallel motor, which comprises at least one pair of magnets 1, at least one pair of conducting rings 2 consisting of two positive conducting rings and two negative conducting rings for providing positive electricity and negative electricity respectively, and at least two independent coils 3 which are independent from each other, such as three, four, five, six and the like. Each pair of magnets 1 comprises a first magnet 11 and a second magnet 12, and the N-pole of the first magnet 11 and the S-pole of the second magnet 12 are used to act on the energized independent coil 3, respectively. Each independent coil 3 has two power connection terminals 31 for electrically connecting the pair of conductive rings 2, specifically, two power connection terminals 31 for slidably contacting the positive conductive ring or the negative conductive ring, and in a rotation period, there is a time when at least two independent coils are connected in parallel, that is, after all the conductive rings are powered on, immediately or after rotating for a certain angle, at least two independent coils of two power connection terminals 31 electrically connected to the conductive rings with different polarities are powered on and connected in parallel. Preferably, in each rotation cycle, the moment at which at least two/three/four/five/six independent coils are connected in parallel with each other is greater than 1/Z rotation cycle, Z being equal to 2, 3, 4 or 5.

It is further preferred that at all times two separate coils are connected in parallel with each other. All the energized independent coils respectively form magnetic fields, the formed N pole/S pole is attracted by the S pole/N pole of the first magnet of the adjacent second magnet to drive the rotor to rotate, and the two electrical connection end points 31 of each group of independent coils 3 are sequentially in sliding contact with the positive conductive ring and the negative conductive ring through the rotation of the rotor to realize the coil commutation.

The conducting ring can be installed on the non-rotating part such as the motor shell according to the requirement, each electric connection terminal 31 can be fixed on the rotating shaft in any mode to realize stable sliding contact with the conducting ring in the rotating process, and the electric connection terminals 31 are not limited in the above, and can realize electrification and reversing through sliding contact with the upper surface, the lower surface, the inner surface or the outer surface of the conducting ring.

The independent coils 3 of this embodiment connect electric end point 31 and conducting ring sliding contact through two, connect every independent coil 3 independently to connect the conducting ring in the rotor rotation process, switch over through the rotatory conducting ring that connects electric end point 31 to contact and realize the switching-over, each does not influence each other between each independent coil 3, can realize that a plurality of independent coils 3 are circular telegram simultaneously, thereby connect in parallel each other between a plurality of independent coils 3 of circular telegram simultaneously and realize the motor model that connects in parallel.

Preferably, the number of the magnet pairs 1 is the same as that of the conductive ring pairs 2, and in this embodiment, when the magnet is put into use, it is preferable that all the conductive rings have the same arc, all the magnets have the same arc, and the conductive rings and the magnets have the same or similar arc.

When the number of pairs of the conducting rings and the number of pairs of the magnets are both one pair, the positive conducting ring and the negative conducting ring are symmetrically arranged by taking the rotating shaft A as a center line, and the first magnet 11 and the second magnet 12 are also symmetrically arranged by taking the rotating shaft A as a center line. When there are a plurality of pairs of conducting rings and pairs of magnets, the first magnets 11 and the second magnets 12 are circumferentially alternately arranged around the rotation shaft, and the positive conducting rings and the negative conducting rings are circumferentially alternately arranged around the rotation shaft. The pairs of magnets 1 and the pairs of conductive rings 2 are uniformly and circumferentially distributed in sequence. Specifically, the spatial positions of the conductive ring pair 2 and the magnet pair 1 may correspond to each other, or may be staggered by a certain angle as shown in fig. 3, and the specific staggered angle is designed according to the actual situation, and is not limited herein.

It should be noted that the same conductive ring/magnet may be a whole, or may be cut into two or more adjacent conductive rings/magnets as shown in fig. 8, and the form of cutting into two or more conductive rings/magnets should be regarded as one, so that the form of cutting one conductive ring/magnet into multiple conductive rings/magnets cannot avoid the protection scope of the present solution in practical use.

Specifically, the concept of the central angle α of the trajectory formed by the two electrical connection terminals 31 of each independent coil 3 is as follows: the two electrical connection terminals 31 are located on a plane perpendicular to the rotation axis a, and an included angle between the two electrical connection terminals 31 and the rotation axis a on the plane is a track central angle α. In one motor model, all individual coils preferably have the same coil angle and tracking center angle, but in practical applications, different coil angles and tracking center angles should not be excluded from the scope of the present invention.

Further, when the number of the magnet pairs 1/the pair of conductive rings 2 is one, the coil angle θ is less than or equal to 180 degrees, and when the number of the magnet pairs 1/the pair of conductive rings 2 is two or more, the relationship between the coil angle θ and the pair number of the magnet pairs/the pair number of conductive rings is:

and N is the number of the magnet pairs 1 or the conductive ring pairs 2.

The independent coils 3 are formed by winding enameled wires on any two winding slots of the iron core, the coil angle refers to the angle occupied by the coil on the 360-degree circumference of the iron core, and ideally, the coil angle θ of each independent coil is as follows:

m is the number of winding slots spanned by the independent coils;

m is the number of winding slots of the iron core.

As shown in fig. 4, when the core has 12 winding slots, the coil angle of the individual coil 3 is 30(m +1), as in fig. 4, the number of individual coils L4, L6 crossing the winding slots is 5, and the coil angle is 180 degrees, i.e., the coil occupies 180 degrees on the 360-degree circumference of the core; the number of individual coils L7 spanning the winding slots was 2 and the coil angle was 90 degrees, i.e. the coils occupied a 90 degree angle over a 360 degree circumference of the core. In practical applications, the coil angle θ will not generally be absolutely equal to

But rather that

Preferably, the coil angle θ is related to the number of magnet pairs 1/conductive ring pairs 2 by:

the central angle alpha of the track formed by the two power connection end points of each independent coil is as follows:

when the number of the magnet pairs/the conductive ring pairs is one pair, alpha is less than or equal to 180,

when the number of the magnet pairs/the conductive ring pairs is more than one pair, alpha is less than 360/N,

and alpha is larger than beta, wherein beta represents the vacant radian between the effective sections of the adjacent conductive rings.

The coil angle and the central trajectory angle α of each individual coil 3 may be identical, may be different, and preferably identical or similar.

Preferably, at least one individual coil is energized with a rotational angle of 360-2N β during a rotational cycle when in use. Namely, the central angle alpha of the track formed by two electric connection end points of at least one independent coil is consistent with the radian of the effective section of the conductive ring.

It is further preferred that all individual coils are in the energized state with a rotation angle of 360-2N β during one rotation period. Namely, the central angle alpha of the track formed by the two electric connection end points of all the independent coils is consistent with the radian of the effective section of the conducting ring.

Preferably, in a rotation period, the energization angle of at least one independent coil approaches 360 degrees, which means that the radian of the vacancy between the effective segments of all adjacent conductive rings approaches zero degrees to satisfy that the energization angle approaches 360 degrees, and the central angle α of the trajectory of at least one independent coil is consistent with the radian of the effective segments of the conductive rings.

The approach here means that the offset difference from 360 degrees (zero degrees) and from 360 degrees (zero degrees) is within a small range, such as a small angle range of 1 degree, 2 degrees, 5 degrees, 10 degrees, etc.

Two adjacent conducting rings can be separated by an insulating film so that the radian of the vacancy approaches zero, and the thinner the insulating film is, the better the condition allows. The energization angle refers to an angle occupied by the independent coil in an energized state in the process of rotating for one circle (360 degrees).

Further preferably, the energization angle of all the individual coils approaches 360 degrees infinitely during one rotation period. That is, the radian of the vacancy between the effective sections of all the adjacent conducting rings approaches to zero. And the central angle alpha of the track of all the independent coils is consistent with the radian of the effective section of the conductive ring. The coil angle can be further made to be the same as or similar to the track central angle, and the similarity means that the angle difference between the track central angle alpha and the coil angle theta is smaller than a preset difference value, and the preset difference value can be 50 degrees, 30 degrees, 20 degrees or 10 degrees.

The following description is given of the number of the pairs of magnets 1/the pairs of conductive rings 2:

as shown in fig. 5, in the case of arranging three independent coils, the skilled person can set the coil angle of each independent coil and the positional relationship between the coils according to the actual situation.

When the number of the magnet pairs 1/the conductive ring pairs 2 is one, as shown in fig. 6, the coil angle θ is preferably 180 degrees, and the central angle α of the trace is preferably 180 degrees, and when the magnetic pole is put into use, the magnetic pole may be as close to 180 degrees as possible, for example, 170 degrees, due to the process, the number of the iron core winding slots, and the like. When there are a plurality of independent coils, such as three independent coils, as shown in fig. 6, the three independent coils may be distributed to intersect circumferentially around the rotation axis a as a center line. In the state of fig. 6, the three independent coils L4, L5, and L6 are all in the energized state, and the three independent coils are connected in parallel, and in the rotation process, the three independent coils 3 are always in the energized state in most cases, unless one of the power connection terminals 31 moves to the gap between the positive conductive ring and the negative conductive ring, when the radians of the two conductive rings approach 180 degrees (i.e., the radians of the gap approach zero), the time passing through the gap is negligible, so that the full-time operation of all the independent coils 3 can be realized. Of course, if more coils are needed, the independent coils 3 can be directly added, and all the added independent coils 3 are connected with the rest independent coils 3 in parallel.

As shown in fig. 9 to 11, when the number of the magnet pairs/the conductive ring pairs is two, three independent coils 3 may be provided, the coil angle θ is preferably 90 degrees, the central angle α of the trajectory is preferably 90 degrees, and the radian of the conductive ring approaches 90 degrees, and when the magnetic-field-sensitive magnetic-field sensor is put into use, the three may be the same or different and all approach 90 degrees as much as possible. The three independent coils L7, L8 and L9 may be arranged in sequence, and of course, more independent coils may be arranged when the device is put into use; when the number of the magnet pairs 1/the conductive ring pairs 2 is three, the coil angle theta is preferably 60 degrees, the central angle alpha of the track is preferably 60 degrees, and the radian of the conductive ring approaches 60 degrees, and when the magnetic pole pair and the conductive ring pairs are put into use, the three are all close to 60 degrees as much as possible.

As shown in fig. 12 and 13, the following analysis shows the effect of the coil parallel connection scheme of the present scheme:

the comparison between each set of parameters and the conventional motor is performed by using a motor model in which a pair of magnets and two pairs of coils are arranged at an included angle of 90 degrees in space as shown in fig. 7:

and (one) analyzing the same current i value:

loss:

P_{conveying appliance}＝i²R

Torque:

T_{conveying appliance}＝T_New＝Ci

P_{Conveying appliance}The loss of the traditional motor; p_NewThe motor loss is realized by the scheme; r is resistance; t is_{Conveying appliance}The torque of the traditional motor is adopted; t is_NewThe motor torque is obtained according to the scheme; c is a constant; i is current; r is resistance.

Conclusion at the same current:

firstly, the power consumption is lost, and the scheme is 50 percent less than that of the traditional motor

② the torque output is equally large.

(II) analysis under the same voltage U:

loss:

torque:

the same voltage conclusion is that: the loss and torque output are both 1 times greater than conventional motors.

(III) loss under the same torque T:

loss:

same torque T_New＝T_{Conveying appliance}

Ci₁＝2Ci₂I.e. i₁＝2i₂I.e. by

And (4) conclusion: under the equal torque, the loss traditional motor is twice as large as the motor of the scheme.

Taking two independent coils as an example, the more independent coils are arranged, the more the above advantages are obvious, and the detailed description is omitted here.

The scheme changes the traditional current switching mode and the current power connection mode, the power-on time of each independent coil 3 is longer, the time of the magnet pair 1 acting on each independent coil 3 is correspondingly longer, and the working state of other coils 3 cannot be influenced by the switching of the current direction of any coil. This scheme magnet can be acted on all distribution coils of rotor all the time in theory, can have the power output all the time to all independent coils promptly, effectively improves motor work efficiency. In addition, all coils of the motor model are arranged in parallel, and compared with a traditional motor, the motor model can greatly reduce motor loss on the premise of unchangeable torque.

Example two

At present, two power supply modes of the motor are provided, one is 0-positive voltage power supply, such as 0-5V, 0-35V and the like, and the other is negative voltage-positive voltage power supply, such as-2.5V-2.5V, -12V-12V and the like. Taking 0-5V and-2.5V as examples, in the first embodiment, when the single-phase motor is put into use, the positive conducting ring is connected with a 5V power supply, and the negative conducting ring is grounded to realize 0-5V power supply, in the first embodiment, the positive conducting ring is connected with a 2.5V power supply, and the negative conducting ring is connected with a-2.5V power supply, in two power connection end points 31 of each independent coil 3, one of the two power connection end points is used for sliding and alternately contacting all the positive conducting rings and the negative conducting rings, and the other is used for fixedly or slidably contacting the grounding electric ring. When the device is put into use, one of the two power connection terminals 31 of each independent coil 3 is always in contact with the grounding electric ring, the other power connection terminal 31 changes the contacted conductive ring through sliding contact, when the other power connection terminal 31 is in contact with a-2.5V conductive ring, the voltage of the independent coil 3 is-2.5V, and when the other power connection terminal 31 is in contact with a 2.5V conductive ring, the voltage of the independent coil 3 is 2.5V. At this time, since one of the power connection terminals 31 is always in contact with the ground ring, the power connection terminal 31 can be located at any position of the ground ring, so the central angle of the formed track can be any angle, and the power connection terminals 31 of all the independent coils 31 in contact with the ground ring can be combined into one. The concept of the trajectory center angle α at this time is: the two electric connection end points axially translate along the rotating shaft A to the same plane vertical to the rotating shaft A, and then the included angle between the two electric connection end points and the rotating shaft A on the plane is the track central angle alpha. The grounding electric ring is arranged at the axial outer side of the rotating shaft, one end of the conductive ring pair far away from the coil is fixed on the motor shell together with the conductive ring, and the circle center of the grounding electric ring and the common circle center of the conductive ring are both arranged on the rotating shaft A.

The specific embodiments described herein are merely illustrative of the spirit of the utility model. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the utility model as defined in the appended claims.

Although magnet pair 1 is used more herein; a pair of conductive rings 2; a coil 3; electrical connection 31, etc., but does not exclude the possibility of using other terms. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed as being without limitation to any additional limitations that may be imposed by the spirit of the present invention.

Claims (10)

1. A parallel motor model structure comprises a rotor and a stator, and is characterized in that the rotor comprises at least two independent coils which are independent of each other;

the stator comprises at least one pair of magnet pairs and at least one pair of conductive ring pairs consisting of positive conductive rings and negative conductive rings, each pair of magnet pairs comprises a first magnet and a second magnet, and the N pole of the first magnet and the S pole of the second magnet are respectively used for acting on electrified independent coils;

each independent coil is provided with two power connection endpoints, one power connection endpoint is used for being electrically connected with the conductive ring pair, the other power connection endpoint is used for being electrically connected with the conductive ring pair or the grounding electrical ring, and the power connection endpoints electrically connected with the conductive ring pair change the electrically connected conductive rings through the rotation of the rotor;

and there is a moment when at least two independent coils are connected in parallel with each other in one rotation period.

2. The parallel motor model structure of claim 1, wherein there are times when at least three/four/five/six independent coils are connected in parallel with each other in one rotation period.

3. The parallel motor model structure of claim 2, wherein in each rotation period, there is a moment when at least two/three/four/five/six independent coils are connected in parallel with each other more than 1/Z rotation period, Z being equal to 2, 3, 4 or 5.

4. The parallel motor model structure of claim 3, wherein both of the two power connection terminals are used for electrically connecting the pair of conductive rings, and a positive conductive ring in the pair of conductive rings is used for connecting a positive power supply, and a negative conductive ring is used for grounding;

or one of the power connection end points is used for being electrically connected with the grounding electric ring, the positive electric ring in the electric ring pair is used for being connected with a positive power supply, and the negative electric ring is used for being connected with a negative power supply.

5. The parallel motor model structure of claim 4, wherein the electrical connection terminal directly or indirectly slides in contact with the grounding ring/conductive ring pair to be electrically connected with the grounding ring/conductive ring pair during rotation.

6. The parallel motor model structure of claim 5, wherein the number of magnet pairs is the same as the number of conductive ring pairs, and when there are a plurality of pairs of magnet pairs and a plurality of pairs of conductive rings, the plurality of pairs of magnet pairs are distributed circumferentially in sequence, and the plurality of pairs of conductive rings are distributed circumferentially in sequence.

7. The parallel motor model structure according to claim 6, wherein when the number of the magnet pairs/conductive ring pairs is one, the coil angle θ is less than or equal to 180 degrees; when the number of the magnet pairs/the conductive ring pairs is more than 1 pair, the relationship between the coil angle theta and the number of the magnet pairs/the conductive ring pairs is as follows:

n is the number of magnet pairs/conductive ring pairs.

8. The parallel motor model structure of claim 7, wherein the coil angle θ is related to the number of magnet pairs/conducting ring pairs by:

9. the parallel motor model structure of claim 8, wherein the central angle α of the trajectory formed by the two power connection terminals of each independent coil is:

when the number of the magnet pairs/the conductive ring pairs is one pair, alpha is less than or equal to 180,

when the number of the magnet pairs/the conductive ring pairs is more than one pair, alpha is less than 360/N,

and alpha is larger than beta, wherein beta represents the vacant radian between the effective sections of the adjacent conductive rings.

10. The parallel motor model structure according to claim 9, wherein the trajectory center angle α is equal to the coil angle θ, or an angle difference between the trajectory center angle α and the coil angle θ is smaller than a preset difference value;

the conducting rings are uniformly distributed in the circumferential direction, and the vacant radians between the effective sections of the adjacent conducting rings are smaller than a set angle;

and the preset difference is 50 degrees, 30 degrees, 20 degrees or 10 degrees;

the set angle is 30 degrees, 20 degrees, 10 degrees or 5 degrees.

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