CN111224490A

CN111224490A - Motor device

Info

Publication number: CN111224490A
Application number: CN201910059601.2A
Authority: CN
Inventors: 陈丰田
Original assignee: Individual
Current assignee: Individual
Priority date: 2018-11-26
Filing date: 2019-01-22
Publication date: 2020-06-02

Abstract

A motor device includes a rotor unit, a stator unit, at least one coil unit, and a switch unit. The stator unit is used for relative rotation of the rotor unit. The at least one coil unit comprises a first coil and a second coil which are wound on the stator unit, and the number of wound magnetic poles of the first coil is smaller than that of wound magnetic poles of the second coil. The switch unit is electrically connected with the first coil and the second coil and is controlled to correspondingly switch the first coil and the second coil to receive or not receive electric energy. Therefore, the change-over switch unit can be controlled to switch and select the first coil or the second coil according to different use requirements so as to switch different rotating speeds, and the rotating speed can be adjusted under the condition of cost control.

Description

Motor device

Technical Field

The present invention relates to a motor device, and more particularly, to a motor device capable of switching rotational speeds.

Background

A conventional motor apparatus (not shown) includes a rotor unit, a stator unit, three coil units wound around the stator unit, and a control unit. The control unit controls power supplied to the coil unit to rotate the rotor unit relative to the stator unit to provide power.

Generally, the capacity of a motor device used in an automobile, an air conditioner, an air compressor, etc. is greater than the capacity of the motor device during operation, so that the motor device is designed to have a higher output power and a higher rotation speed for smooth start, and the motor device still provides the same output power and rotation speed for continuous operation after the motor device starts to operate, thereby not only generating redundant energy waste, but also meeting the current time trend of energy conservation.

In order to solve this problem, some motor apparatuses are currently provided with a variable frequency transformer circuit, which changes the output power and the rotation speed of the motor apparatus by adjusting the output voltage or the output current frequency of the ac power supplied to the coil unit.

Disclosure of Invention

The invention aims to provide a motor device which can easily switch rotating speed and has the manufacturing cost.

The motor device comprises a rotor unit, a stator unit, at least one coil unit and a change-over switch unit.

The stator unit is used for relative rotation of the rotor unit.

The at least one coil unit comprises a first coil and a second coil which are wound on the stator unit, and the number of wound magnetic poles of the first coil is smaller than that of wound magnetic poles of the second coil.

The switch unit is electrically connected with the first coil and the second coil and is controlled to correspondingly switch the first coil and the second coil to receive or not receive electric energy.

In the motor apparatus of the present invention, the switch unit is further controlled to switch the first coil and the second coil correspondingly to receive or provide the electric energy.

In the motor device of the present invention, the output power of the first coil is larger than the output power of the second coil.

In the motor device of the present invention, the switch unit is controlled to switch and select the first coil to receive the electric energy when the motor device is started or the first output requirement is met, and the switch unit is controlled to switch and select the second coil to receive the electric energy after the motor device is started or the second output requirement is met.

In the motor device of the present invention, the wire diameter of the first coil is larger than the wire diameter of the second coil.

In the motor apparatus of the present invention, the winding position of the second coil is closer to the rotor unit than the winding position of the first coil.

In the motor device of the present invention, the output power of the first coil is a rated power of the motor device.

In the motor apparatus of the present invention, the stator unit includes a plurality of first wire grooves around which the first coils are wound, and a plurality of second wire grooves around which the second coils are wound.

In the motor apparatus of the present invention, the depth of the first wire guide groove is greater than the depth of the second wire guide groove.

In the motor apparatus of the present invention, the first wire grooves and the second wire grooves are arranged in a staggered and surrounding manner and are respectively arranged at equal angles.

The invention has the beneficial effects that: through setting up the winding magnetic pole number inequality first coil with the second coil to the collocation sets up change over switch unit can be according to different user demands and control change over switch unit switches over the selection and uses first coil or the second coil, with the rotational speed of switching over different, so can have under the condition of cost control concurrently, reach the efficiency of adjustment rotational speed.

Drawings

FIG. 1 is a block diagram of a first embodiment of a motor apparatus of the present invention;

FIG. 2 is a fragmentary schematic view of the first embodiment;

FIGS. 3 and 4 are schematic wiring diagrams of three coil units of the first embodiment; and

fig. 5 is a schematic view of one of the coils of one of the coil units of the first embodiment for illustrating the operation thereof;

fig. 6 and 7 are schematic winding diagrams of a plurality of first coils and a plurality of second coils according to the first embodiment;

fig. 8 is a schematic view illustrating another aspect of a stator unit of the first embodiment;

fig. 9 is a schematic view illustrating another winding pattern of the coil unit of the first embodiment;

FIG. 10 is a block diagram of a second embodiment of the motor apparatus of the present invention;

FIG. 11 is a fragmentary schematic view of the second embodiment;

FIG. 12 is a block schematic view of a third embodiment of the motor apparatus of the present invention;

FIG. 13 is a fragmentary schematic view of the third embodiment;

FIG. 14 is a block diagram of a fourth embodiment of the motor apparatus of the present invention;

fig. 15 and 16 are schematic diagrams illustrating a winding manner of a first coil and a second coil in a stator unit according to the fourth embodiment;

FIG. 17 is a block schematic view of a fifth embodiment of the motor apparatus of the present invention;

fig. 18 and 19 are schematic diagrams illustrating a winding manner of a first coil, a second coil and a third coil in a stator unit in the fifth embodiment;

FIG. 20 is a block schematic view of a sixth embodiment of the motor apparatus of the present invention; and

fig. 21 and 22 are diagrams illustrating a winding manner of a first coil, a second coil, a third coil and a fourth coil in a stator unit according to the sixth embodiment.

Detailed Description

Before the present invention is described in detail, it should be noted that in the following description, like elements are represented by like reference numerals.

Referring to fig. 1 and 2, a first embodiment of the motor apparatus of the present invention is adapted to be electrically connected to a three-phase power source 9, and includes a rotor unit 2, a stator unit 3, three coil units 4, a switch unit 5, and a control unit 6.

The rotor unit 2 rotates about its axis.

The stator unit 3 is disposed around the rotor unit 2, is relatively rotated by the rotor unit 2, and includes a plurality of first wire grooves 31. In the present embodiment, the number of the first wire grooves 31 is 36, but the stator unit 3 can have different numbers of the first wire grooves 31 according to actual requirements, and is not limited thereto.

Each coil unit 4 includes a first coil 41 and a second coil 42 wound around the first wire groove 31, the number of wound magnetic poles of the first coil 41 is smaller than the number of wound magnetic poles of the second coil 42, the output power of the first coil 41 is greater than the output power of the second coil 42, the wire diameter of the first coil 41 is greater than the wire diameter of the second coil 42, and the winding distance (pole distance) of the first coil 41 is greater than the winding distance of the second coil 42. The output power of the first coil 41 is preferably the rated power of the motor device.

Referring to fig. 1, 3 and 4, the coil units 4 can be connected in star (or Y) shape as shown in fig. 3, or in delta (Δ) shape as shown in fig. 4, and are electrically connected to the three-phase power supply 9 respectively.

Since the coil unit 4 is a three-phase coil, and the matching winding manner between the three-phase coils is a matter familiar in the art, it is not described herein, and the winding turns drawn in the

drawings

2, 8, 11, 13, 15, 18, and 21 of the present application are only schematic, and are used for explaining the winding manner, and do not represent a specific number of winding turns, which is described herein.

It is preferable that the first coil 41 and the second coil 42 are both wound by distributed windings (the same shall apply to the third coil 43 (see fig. 11) described below), so that the number of coils wound will be uniformly distributed in the corresponding first wire slots 31, however, for clarity of illustration, only one of the coils is shown in each of the first coil 41 and the second coil 42 in fig. 6, 7 and 9.

Referring to fig. 1 and 2, the switch unit 5 is electrically connected to the power supply 9, the control unit 6, the first coil 41 and the second coil 42.

The control unit 6 controls the changeover switch unit 5 to switch to select the first coil 41 or the second coil 42 to be electrically connected to the power supply 9. The control unit 6 controls the switch unit 5 to switch and select the first coil 41 to be electrically connected to the power supply 9 when the motor device is started or a first output requirement is met, and controls the switch unit 5 to switch and select the second coil 42 to be electrically connected to the power supply 9 after the motor device is started or a second output requirement is met. Wherein the first output requirement is a higher power output and higher speed requirement, and the second output requirement is a lower power output and lower speed requirement.

Referring to fig. 1, 2 and 5, the principle is illustrated as follows:

the output power of a conventional motor device is expressed in horsepower (hp), which is the product of torque and rotation speed.

The torque is expressed by the following formula, wherein T is torque, B is magnetic field, I is current, L is coil length, D is coil width, N is coil number, and theta is the included angle between the magnetic field B and the current I. The current I is proportional to the square of the wire diameter and is related to the number of coils N.

From equation 1, it can be deduced that in the same motor arrangement:

t. varies to B.I.N (equation 2)

The synchronous speed formula of the motor device is as follows, wherein n_sFor synchronous speed, f is the frequency of the power supply 9, P is the number of poles (poles), and in taiwan the frequency f of the power supply 9 is typically 60 Hz.

n_s120f/P (formula 3)

The winding pole pitch formula is as follows:

winding pole pitch slot number/pole number (formula 4)

Referring to fig. 2, 6 and 7, in the present embodiment, the number of the first slots 31 of the stator unit 3 is 36, the number of the magnetic poles wound by each of the first coils 41 and the second coils 42 is set to 4 poles and 12 poles, respectively, so that, according to the

formulas

3 and 4, the winding pole pitch of each of the first coils 41 and the second coils 42 is 9 and 3 as shown in fig. 6 and 7, respectively, and the rotation speed is 1800 revolutions Per Minute (abbreviated as rpm) and 600 revolutions Per Minute, wherein, the tooth pitch (tooth pitch) between the first coils 41 and the second coils 42 is preferably designed to be 1, respectively, but not limited thereto.

It should be noted that the number of the first wire slots 31 and the number of the magnetic poles wound around each of the first coils 41 and the second coils 42 can be determined according to the actual requirement, and is not limited thereto. For example, as shown in fig. 8 and 9, the stator unit 3 may include 24 first wire slots 31, and the number of the magnetic poles wound by each of the first coils 41 and the second coils 42 is set to 4 poles and 8 poles, respectively, so that the winding pitch of each of the first coils 41 and the second coils 42 is 6 and 3, respectively, according to

equations

3 and 4, and the rotation speed is 1800 rpm and 900 rpm. It is preferable to design the pitch between the first coils 41 to be 2, and the pitch between the second coils 42 to be 1, but not limited thereto.

Referring to fig. 1 and fig. 2, in the present embodiment, the output power of each of the first coil 41 and the second coil 42 is designed to be 2 horsepower and 1/4 horsepower, wherein the number of turns of the first coil 41 and the second coil 42 can be adjusted according to formula 1 and actual requirements by persons skilled in the art, and details thereof are not repeated herein.

In practical use, when the motor device is to be started, the control unit 6 controls the switch unit 5 to switch and select the first coils 41 (preferably rated power) to be electrically connected to the three-phase input of the power supply 9, respectively, since the number of poles of the first coils 41 is 4 poles and the output power is 2 horsepower, therefore, the rotation speed of the motor device is 1800 rpm and the output power is 2 horsepower, when the motor device is started and reaches a set load, the control unit 6 can control the switch unit 5 to switch and select the three-phase input of the second coil 42 electrically connected with the power supply 9 respectively, at this time, since the number of poles of the second coil 42 is 12 poles and the output power is 1/4 horsepower, therefore, the speed of the motor is 600 rpm and the output power is 1/4 horsepower.

When the motor apparatus is in operation, if the load changes and requires a larger output power and a higher rotation speed (i.e., the first output requirement), the control unit 6 can control the switch unit 5 to switch back to select the first coil 41 to be electrically connected to the three-phase input of the power supply 9, respectively, and when the load changes and requires a smaller output power and a lower rotation speed (i.e., the second output requirement), the control unit 6 can control the switch unit 5 to switch back to select the second coil 42 to be electrically connected to the three-phase input of the power supply 9, respectively.

It should be noted that the first output requirement and the second output requirement may also be designed according to settings such as temperature and pressure, for example, when the motor device is applied to an air conditioner, the first output requirement may correspond to a larger temperature difference setting, and the second output requirement may correspond to a lower temperature difference setting, that is, when the air conditioner starts to operate, the temperature difference between the room temperature and the set temperature is larger, so that the first coil 41 is switched to operate, and when the air conditioner operates for a period of time, the temperature difference between the room temperature and the set temperature is reduced to a certain value or less, the second coil 42 is switched to operate, so that the output can be switched correspondingly according to different usage requirements.

Through the above description, the advantages of the present embodiment can be summarized as follows:

first, by arranging the first coil 41 and the second coil 42 with different numbers of wound magnetic poles, and arranging the switch unit 5 in a matching manner to be controlled to correspondingly switch the first coil 41 and the second coil 42 to receive or not receive electric energy, the first coil 41 or the second coil 42 can be switched and selected to be used according to different use requirements to switch different rotating speeds, so that the switch unit 5 can be simply used for switching without additionally arranging a frequency conversion and voltage transformation circuit to adjust according to various rotating speed requirements.

And secondly, the first coil 41 and the second coil 42 are designed to have different powers by arrangement and matching, and the required powers can be switched and selected according to different use requirements, so that the energy-saving effect can be achieved under the condition of cost control.

Furthermore, by switching the second coil 42 with lower selection power and rotation speed after the motor device is operated to reach the set load, the abrasion generated during high-speed operation of the motor device can be reduced, and therefore, the maintenance cost can be reduced.

Third, by disposing the second coil 42 with a smaller wire diameter closer to the rotor unit 2, a better magnetic conduction effect can be obtained by reducing the distance between the second coil 42 with a smaller current and the rotor unit 2.

Referring to fig. 10 and 11, a second embodiment of the motor apparatus of the present invention is shown, the second embodiment is similar to the first embodiment, and the difference between the second embodiment and the first embodiment is:

the stator unit 3 comprises 24 first conductor slots 31.

Each coil unit 4 further includes a third coil 43 wound around the first wire groove 31, the number of wound magnetic poles of the third coil 43 is greater than the number of wound magnetic poles of the second coil 42, the output power of the third coil 43 is smaller than the output power of the second coil 42, the wire diameter of the third coil 43 is smaller than the wire diameter of the second coil 42, and the winding pitch of the third coil 43 is smaller than the winding pitch of the second coil 42.

In each coil unit 4, the winding position thereof is the third coil 43, the second coil 42, and the first coil 41 from the near to the far from the rotor unit 2.

In the present embodiment, the number of the first wire grooves 31 of the stator unit 3 is 24, and the number of the magnetic poles wound by each of the first coil 41, the second coil 42 and the third coil 43 is set to 4 poles, 8 poles and 12 poles, respectively, so that the winding pole pitch of each of the first coil 41, the second coil 42 and the third coil 43 is 6, 3 and 2 respectively according to the

formulas

3 and 4, and the corresponding rotation speed is 1800, 900 and 600 revolutions per minute respectively.

In the present embodiment, the output power of each of the first coil 41, the second coil 42 and the third coil 43 is designed to be 2 hp, 1/2 hp and 1/4 hp, wherein the number of turns of the first coil 41, the second coil 42 and the third coil 43 can be adjusted according to formula 1 and actual requirements by persons skilled in the art, and will not be described herein.

In practical use, when the motor apparatus is started or has the first output requirement, the control unit 6 controls the switch unit 5 to switch and select the first coil 41 to be electrically connected to the three-phase input of the power supply 9, when the motor apparatus has the second output requirement, the control unit 5 controls the switch unit 5 to switch and select the second coil 42 to be electrically connected to the three-phase input of the power supply 9, and when a third output requirement exists, the control unit 5 controls the switch unit 5 to switch and select the third coil 43 to be electrically connected to the three-phase input of the power supply 9. Wherein the third output demand is a demand for a lower power output and a lower speed than the second output demand.

In practical use, when the motor apparatus is to be started, the control unit 6 controls the switch unit 5 to switch and select the first coil 41 to be electrically connected to the three-phase input of the power supply 9, respectively, and after the motor apparatus is started and reaches a set load, the control unit 6 may control the switch unit 5 to switch and select the second coil 42 to be electrically connected to the three-phase input of the power supply 9, respectively.

When the motor apparatus is in operation, if the load changes and requires a larger output power and a higher rotation speed (i.e. the first output requirement), the control unit 6 can control the switch unit 5 to switch back to select the first coil 41 to be electrically connected to the three-phase input of the power supply 9, respectively, and when the load changes and requires a smaller output power and a lower rotation speed (i.e. the second output requirement or the third output requirement), the control unit 6 can control the switch unit 5 to switch to select the second coil 42 or the third coil 43 to be electrically connected to the three-phase input of the power supply 9, respectively, according to the requirement.

Thus, the second embodiment can achieve the same purpose and effect as the first embodiment, and by adding the third coil 43, the third output requirement can be provided for the user to switch and select, so as to have better application flexibility.

Referring to fig. 12 and 13, a third embodiment of the motor apparatus of the present invention is shown, the third embodiment is similar to the first embodiment, and the difference between the third embodiment and the first embodiment is:

the motor device is a single-phase motor and includes a coil unit 4, and the coil unit 4 further includes an Auxiliary coil 44 (or Start Winding) wound around the first wire groove 31 and used for assisting starting. The first coil 41 and the second coil 42 are used as main coils (main windings), and the phase of the auxiliary coil 44 is preferably 90 degrees different from that of the corresponding first coil 41 in terms of space, so as to achieve a better starting control effect.

In practical use, when the motor device is to be started, the control unit 6 controls the switch unit 5 to switch and select the first coil 41 and the auxiliary coil 44 to be electrically connected to the single-phase power supply 9, when the motor device is started to a certain extent (preferably, when the rotation speed reaches about 75% of the synchronous rotation speed), the control unit 6 controls the switch unit 5 to switch and select only the first coil 41 to be electrically connected to the power supply 9, that is, the auxiliary coil 44 can be disconnected at this time, and then, when the motor device is started and reaches a set load, the control unit 6 controls the switch unit 5 to switch and select the second coil 42 to be electrically connected to the power supply 9, so as to reduce the output power of the motor device and reduce the rotation speed.

When the motor apparatus is in operation, if the load changes and requires a larger output power and a higher rotation speed (i.e., the first output requirement), the control unit 6 can control the switch unit 5 to switch back to select the first coil 41 to be electrically connected to the power supply 9, and when the load changes and requires a smaller output power and a lower rotation speed (i.e., the second output requirement), the control unit 6 can control the switch unit 5 to switch back to select the second coil 42 to be electrically connected to the power supply 9.

Thus, the third embodiment can achieve the same purpose and effect as the first embodiment, and can be well applied to the single-phase motor device.

Referring to fig. 14, 15 and 16, a fourth embodiment of a motor device according to the present invention is shown, and the fourth embodiment is similar to the first embodiment, and the difference between the fourth embodiment and the first embodiment is:

the motor arrangement is also adapted to electrically connect one battery module 8.

The stator unit 3 further includes a plurality of second wire grooves 32, the depth of the first wire groove 31 is greater than the depth of the second wire groove 32, and the first wire groove 31 and the second wire groove 32 are disposed in a staggered manner, preferably, they are disposed at regular intervals, but not limited thereto.

In the present embodiment, the number of the first wire grooves 31 is 18, the number of the second wire grooves 32 is 18, and the total number is 36, but the stator unit 3 may have different numbers of the first wire grooves 31 and the second wire grooves 32 according to actual requirements, and is not limited thereto.

The first coil 41 is wound around the first wire groove 31. The second coil 42 is wound around the second wire groove 32. The output power of each first coil 41 is designed to be larger than the output power of each second coil 42, the number of wound magnetic poles of each first coil 41 is smaller than the number of wound magnetic poles of each second coil 42, and the wire diameter of each first coil 41 is larger than the wire diameter of each second coil 42.

The depth of the first wire groove 31 and the second wire groove 32 is proportional to the wire diameter and the power of the first coil 41 and the second coil 42, and the power is related to the number of wound magnetic poles. The number of turns of the first coil 41 and the second coil 42 can be adjusted by a person skilled in the art according to formula 1 and actual requirements, which is not described herein.

Here, the first coil 41 and the second coil 42 are both wound by distributed winding (the third coil 43 (see fig. 17) and the fourth coil 45 (see fig. 20) described below are also the same), so the number of coils to be wound is distributed in each of the corresponding first wire groove 31 and second wire groove 32 (the third coil 43 and the fourth coil 45 described below correspond to the third wire groove 33 and the fourth wire groove 34, respectively), however, for the sake of clarity of illustration, only one coil unit 4 is drawn in fig. 16, 19 and 22, and each of the first coil 41, the second coil 42, the third coil 43, and the fourth coil 45 is explained by one coil.

Referring to fig. 14, 15 and 16, the switch unit 5 is electrically connected to the first coil 41, the second coil 42, the control unit 6, the power source 9 and the battery module 8, and is controlled to switch the first coil 41 and the second coil 42 to receive or not receive power, and to switch the first coil 41 and the second coil 42 to receive power from the power source 9 or provide power to the battery module 8.

In this embodiment, since the number of slots of the first wire slot 31 and the number of slots of the second wire slot 32 of the stator unit 3 are 18 and the total number of slots is 36, and the number of poles wound by each of the first coil 41 and the second coil 42 is respectively designed to be 2 poles and 6 poles, the winding pole pitch of each of the first coil 41 and the second coil 42 is respectively 9 and 3 according to the

above equations

3 and 4, and if calculated by the total number of slots, the winding pole pitch is respectively 18 and 6 shown in fig. 16, and the rotation speed of each of the first coil 41 and the second coil 42 is respectively 3600 revolutions per minute and 3601200 revolutions per minute. In fig. 16, the pitch (tooth pitch) between the corresponding first coil 41 and the corresponding second coil 42 is 1, but the invention is not limited thereto.

In actual operation, the control unit 6 controls the switch unit 5 to operate in a motor mode or a generator mode.

In the motor mode, similar to the above, since the torque and power required for starting are large, the control unit 6 can control the switch unit 5 to switch the first coil 41 with large power to use when starting, and switch the first coil 42 with small power to use when maintaining operation after starting, and can switch the first coil 41 or the second coil 42 to use according to the requirement when the output power needs to be increased or decreased or the rotation speed needs to be changed if the load changes during operation.

When the motor apparatus can recover the excess energy, for example, when the motor apparatus is applied to an electric vehicle and the braking deceleration is required, the control unit 6 can control the switch unit 5 to switch to the generator mode, at this time, the control unit 6 controls the switch unit 5 to switch the first coil 41 or the second coil 42 that is idle at present to be electrically connected to the battery module 8, for example, if the first coil 41 is electrically connected to the power supply 9 and used as a drive, the second coil 42 is switched to be electrically connected to the battery module 8, so that the second coil 42 generates power by the operation kinetic energy of the motor apparatus through induction and stores the power to the battery module 8, and thus, the excess energy of the motor apparatus can be recovered and utilized, and further, the energy utilization rate is improved.

Thus, the fourth embodiment can achieve the same purpose and effect as the first embodiment, and also has the following effects:

firstly, by arranging the first coil 41 and the second coil 42, and correspondingly switching the first coil 41 and the second coil 42 through the switch unit 5 to receive electric energy or provide electric energy, the driving and power generation functions can be provided at the same time, the energy utilization rate is improved, and by arranging the first wire groove 31 and the second wire groove 32 to respectively provide for the first coil 41 and the second coil 42, the magnetic force line distribution of the first coil 41 and the second coil 42 can be staggered, the independence of the magnetic fields generated by the two is improved, the magnetic force interaction between the two is reduced, and better driving operation effect and power generation effect are obtained, and because the current technology for manufacturing the stator unit 3 is formed by stacking a plurality of stamped silicon steel sheets, the difference in manufacturing between the present embodiment and the present stator unit 3 is only in that different molds are used, there is no other difference in the manufacturing process and assembly, that is, the stator unit 3 of the present embodiment hardly increases the manufacturing cost, so that the motor device of the present embodiment can provide the driving and power generating functions, improve the energy utilization rate, and also can consider the production and maintenance costs.

Secondly, by designing the first wire grooves 31 and the second wire grooves 32 to be alternately arranged, disposing the first coils 41 with higher output power in the deeper first wire grooves 31, and disposing the second coils 42 with lower output power in the shallower second wire grooves 32, not only can the first coils 41 and the second coils 42 be as close to the rotor unit 2 as possible to obtain better electromagnetic induction effect, but also the situation that the distance between the same coil unit and the rotor unit 2 may be inconsistent in each wire groove when the first coils 41 and the second coils 42 are wound in the same wire groove can be avoided, that is, taking the second coils 42 as an example, the distance when the second coils 42 and the first coils 41 are wound together in the same wire groove, the distance between the first coil 41 and the second coil 42 and the distance between the first coil and the second coil 42 when they are individually wound in a wire slot will be different, which will cause the difference between the electromagnetic induction effect and the expected electromagnetic induction effect.

Referring to fig. 17, 18 and 19, a fifth embodiment of the motor apparatus of the present invention is shown, wherein the fifth embodiment is similar to the fourth embodiment, and the difference between the fifth embodiment and the fourth embodiment is:

the motor arrangement further comprises a third coil 43, and the stator unit 3 further comprises a plurality of third wire grooves 33 around which the third coil 43 is wound, the third wire grooves 33 having a smaller depth than the second wire grooves 32. The first wire groove 31, the second wire groove 32 and the third wire groove 33 are arranged in a staggered and surrounding manner. In this embodiment, since the number of the first wire groove 31, the second wire groove 32 and the third wire groove 33 is 12, it is preferable to design the first wire groove 31, the second wire groove 32 and the third wire groove 33 to be sequentially arranged at intervals in a circulating manner to obtain an effect of uniform distribution. The stator unit 3 may have different numbers of the first wire grooves 31, the second wire grooves 32, and the third wire grooves 33 according to actual requirements, but is not limited thereto.

Wherein the output power of the second coil 42 is greater than the output power of the third coil 43. The second coil 42 has a wire diameter larger than that of the third coil 43.

The depths of the first wire groove 31, the second wire groove 32, and the third wire groove 33 are proportional to the sizes of the wire diameters and the powers of the first coil 41, the second coil 42, and the third coil 43, which are correspondingly disposed.

The changeover switch unit 5 is electrically connected to the third coil 43 and is controlled to switch the third coil 43 to receive electric power, not receive electric power, or supply electric power.

In the present embodiment, since the number of slots of each of the first, second, and third

conductive slots

31, 32, and 33 of the stator unit 3 is 12, the total number is 36, and the number of magnetic poles around which the first, second, and

third coils

41, 42, and 43 are wound is set to 2-pole, 4-pole, and 12-pole, respectively, and according to the

above equations

3 and 4, the winding pole pitches of the first, second, and

third coils

41, 42, and 43 are respectively 6, 3, and 1, and the number of rotations of the first, second, and

third coils

41, 42, and 43 is respectively 3601800 rpm, and 600 rpm, as shown in fig. 19, when calculated by the total number of slots.

In the motor mode, the control unit 6 can control the switch unit 5 to switch and select the first coil 41, the second coil 42 or the third coil 43 with the required power and rotation speed according to the requirement, and in the generator mode, the control unit 6 can also control the switch unit 5 to select the first coil 41, the second coil 42 or the third coil 43 which is idle at present according to the requirement to be electrically connected to the battery module 8 to provide power generation.

Thus, the fifth embodiment can achieve the same purpose and effect as the fourth embodiment, and also provide the third coil 43 for switching the driving or power generation of the switch unit 5, thereby providing better application flexibility.

Referring to fig. 20, 21 and 22, a sixth embodiment of a motor device according to the present invention is shown, and the sixth embodiment is similar to the fourth embodiment, and the difference between the sixth embodiment and the fourth embodiment is:

the motor device further comprises a fourth coil 45, and the stator unit 3 further comprises a plurality of fourth wire grooves 34 for winding the fourth coil 45, wherein the depth of the fourth wire grooves 34 is smaller than that of the third wire grooves 33. The first wire groove 31, the second wire groove 32, the third wire groove 33 and the fourth wire groove 34 are arranged in a staggered and surrounding manner. In this embodiment, since the number of the first wire groove 31, the second wire groove 32, the third wire groove 33 and the fourth wire groove 34 is respectively 6, 12 and 6, and the number of the grooves is not equal, it is preferable to design the first wire groove 31, the second wire groove 32, the third wire groove 33 and the fourth wire groove 34 to be uniformly distributed in an equiangular and staggered manner.

The changeover switch unit 5 is electrically connected to the fourth coil 45 and is controlled to switch the fourth coil 45 to receive electric power, not receive electric power, or supply electric power.

Wherein the output power of the third coil 43 is greater than the output power of the fourth coil 45. The wire diameter of the third coil 43 is larger than that of the fourth coil 45.

The depths of the first wire groove 31, the second wire groove 32, the third wire groove 33, and the fourth wire groove 34 are proportional to the diameters and powers of the first coil 41, the second coil 42, the third coil 43, and the fourth coil 45, which are correspondingly disposed.

In this embodiment, the number of slots of the first, second, third and

fourth wire grooves

31, 32, 33 and 34 is 6, 12 and 6, respectively, and the total number is 36, and the number of magnetic poles wound around the first, second, third and

fourth coils

41, 42, 43 and 45 is set to 2, 4 and 2, respectively, and the winding pole pitch of the first, second, third and

fourth coils

41, 42, 43 and 45 is 3, respectively, and 18, 9 and 18, respectively, when calculated by the total number of slots, and the number of rotations of the first, second, third and

fourth coils

41, 42, 43 and 45 is 3600, 1800 and 3600 revolutions per minute, respectively, according to the

above equations

3 and 4.

In actual use, since the rotation speeds of the first coil 41 and the fourth coil 45, and the second coil 42 and the third coil 43 are the same, in the motor mode, the control unit 6 can simultaneously drive the first coil 41 and the fourth coil 45, and the second coil 42 and the third coil 43 having the same rotation speed, in addition to controlling the switch unit 5 to switch and select the first coil 41, the second coil 42, the third coil 43, or the fourth coil 45 having the required power and rotation speed as required, for example, when the motor apparatus is to be started, only the first coil 41 having the maximum power may be driven, or the first coil 41 and the fourth coil 45 may be driven simultaneously, or the second coil 42 and the third coil 43 may be driven simultaneously to provide a large power, and when steady operation is started, the first coil 41, the second coil 42, the third coil 43, or the fourth coil 45 can be arbitrarily switched to a desired power and rotation speed as required, so that more options in switching control can be provided.

In this way, the sixth embodiment can also achieve the same purpose and efficacy as the fourth embodiment, and further application flexibility can be provided by providing the fourth coil 45 and designing the rotation speeds of the first coil 41 and the fourth coil 45, and the second coil 42 and the third coil 43 to be the same, respectively.

In summary, the motor device of the present invention can achieve the object of the present invention.

The above description is only an example of the present invention, and the scope of the present invention should not be limited thereby, and the invention is still within the scope of the present invention by simple equivalent changes and modifications made according to the claims and the contents of the specification.

Claims

1. A motor device comprises a rotor unit and a stator unit;

the stator unit is used for relative rotation of the rotor unit;

the method is characterized in that:

the motor device also comprises at least one coil unit and a change-over switch unit;

the at least one coil unit comprises a first coil and a second coil which are wound on the stator unit, and the number of wound magnetic poles of the first coil is smaller than that of wound magnetic poles of the second coil;

2. The motor apparatus according to claim 1, wherein: the switch unit is also controlled to correspondingly switch the first coil and the second coil to receive electric energy or provide electric energy.

3. The motor apparatus according to claim 1, wherein: the output power of the first coil is greater than the output power of the second coil.

4. The motor apparatus according to claim 3, wherein: when the motor device is started or the first output requirement is met, the change-over switch unit is controlled to switch and select the first coil to receive the electric energy, and after the motor device is started or the second output requirement is met, the change-over switch unit is controlled to switch and select the second coil to receive the electric energy.

5. The motor apparatus according to claim 3, wherein: the wire diameter of the first coil is larger than that of the second coil.

6. The motor apparatus according to claim 3, wherein: the winding position of the second coil is closer to the rotor unit than the winding position of the first coil.

7. The motor apparatus according to claim 3, wherein: the output power of the first coil is the rated power of the motor device.

8. The motor apparatus according to claim 1, wherein: the stator unit comprises a plurality of first wire grooves for winding the first coils and a plurality of second wire grooves for winding the second coils.

9. The motor apparatus according to claim 8, wherein: the depth of the first wire groove is larger than that of the second wire groove.

10. The motor apparatus according to claim 8, wherein: the first wire groove and the second wire groove are arranged in a staggered surrounding mode and are respectively arranged at equal angles.