TWI808910B - Energy-saving drive generator - Google Patents

Abstract

An energy-saving driving generator includes a driving unit and two generating units. The driving unit includes a main stator module fixed in the shell, and two first rotor modules located on two opposite sides of the main stator module, each first rotor module has a first ring support. Each power generation unit includes a second rotor module, a third rotor module, a primary stator module, and a rotating shaft fixed to the first annular support. When the first annular support of each first rotor module rotates, it drives the respective rotating shaft and the third rotor module to rotate, so that the respective secondary stator modules generate induced currents. The present invention improves the energy conversion efficiency and reduces the overall required cost by co-arranging the plurality of first magnetic parts of each first rotor module and the corresponding second rotor module on the first ring support.

Description

Energy-saving drive generator

The invention relates to a generator, in particular to an energy-saving drive generator.

A conventional generator (as shown in Taiwan Patent Publication No. TW202226719A) includes a drive motor, a generator module, and a controller. The generator module has a plurality of constant magnetic flywheels and a plurality of coil ring groups arranged alternately, and a flywheel rotating shaft passing through the constant magnetic flywheels and the coil ring groups.

In actual use, the existing generator will drive the rotation shaft of the flywheel of the generator module through the drive motor, thereby driving the permanent magnet flywheels to rotate around the rotation axis of the flywheel, and then keep the coil ring groups stationary, and then make the coil ring groups sense the magnetic field changes caused by the rotation of the permanent magnet flywheels to generate induced electromotive force.

However, the existing generators need to supply the drive motor with direct current to rotate first, and then drive the rotation shaft of the flywheel to rotate, and then the permanent magnet flywheels are rotated, and finally the coil ring groups are induced to generate electromotive force, and the transmission process of mechanical energy still produces certain losses, which leads to unsatisfactory conversion efficiency.

Therefore, the object of the present invention is to provide an energy-saving drive generator that can overcome the above-mentioned disadvantages.

Therefore, the energy-saving driving generator of the present invention is suitable for a driving power supply. The energy-saving driving generator includes a casing, a driving unit, and two generating units. The shell extends along a length direction and defines a chamber. The drive unit includes a main stator module located in the chamber and fixed to the casing, and two first rotor modules located in the chamber and located on two opposite sides of the main stator module along the length direction respectively. The main stator module has a ring-shaped main ring support, a plurality of main coil groups fixed to the main ring support, and a drive input terminal electrically connected to the main coil groups. The main ring support has a main through hole passing through the length direction, and each first rotor module has a ring shape. The first annular support, and a plurality of first magnetic parts fixed to the first annular support, the first annular support has a first through hole passing through the length direction, and the first magnetic parts are adjacent to the main coil groups, and the driving input end is used to electrically connect the driving power supply to provide electric energy to the main coil groups. The generating units are located in the chamber and are respectively located on two opposite sides of the drive unit along the length direction. Each generating unit includes a second rotor module, a third rotor module arranged apart from the main annular support along the length direction and spaced apart from the respective first annular support, a secondary stator module arranged at intervals along the length direction between the second rotor module and the third rotor module, and a rotating shaft. Each second rotor module has a plurality of first magnetic parts opposite to the corresponding first rotor module and is fixed to the respective first The second magnetic part of the ring support, each third rotor module has a ring-shaped third ring support, and a plurality of third magnetic parts fixed to the third ring support, the third ring support has a third through hole penetrating along the length direction, the third magnetic parts of each third rotor module are respectively arranged opposite to the second magnetic parts of the corresponding second rotor module along the length direction and are magnetically opposed to each other (attract each other), each primary stator module has a ring-shaped sub ring support, and multiple secondary coils fixed to the sub ring support group, and a power generation output end electrically connected to the secondary coil groups, each primary annular support has a secondary through hole penetrating along the length direction, each rotating shaft passes through the respective first through hole and the third perforation and is fixedly connected to the respective first annular support and the third annular support, and each rotating shaft passes through the respective secondary through hole and is rotatably arranged on the respective secondary annular support, when the driving power supply provides electric energy to the primary coil groups, the primary coil groups generate a magnetic field to communicate with the first magnetic fields of each first rotor module The components generate magnetic force, and then drive the first annular support of each first rotor module to rotate, and drive the respective rotating shaft and the respective third rotor module to rotate relative to the respective sub-stator modules, and then make the respective sub-stator modules The sub-coil groups cut the magnetic fields generated by the respective second rotor modules of the respective second rotor modules and the respective third rotor modules of the third magnetic components, so that the sub-coil groups generate induced currents and output them at the respective output terminals of the power generation.

The effect of the present invention is: by aligning the main stator modules of the drive unit with the first rotor modules, the first magnetic parts of the first rotor modules are driven by the magnetic field generated by the main coil groups to drive the first ring supports to rotate, and then drive the rotating shafts to rotate relative to the sub ring supports, so that the second magnetic parts of the second rotor modules and the third magnetic parts of the third rotor modules rotate relative to the sub stator modules, so that the sub stators The secondary coil groups of the module generate induced current. Therefore, by arranging the first magnetic parts of each first rotor module and the second magnetic parts of the corresponding second rotor module on the corresponding first annular support, the structures of the drive unit and the power generation units are effectively simplified, and the energy-saving drive generator of the present invention can simultaneously improve the energy conversion efficiency and reduce the overall required cost.

Before the present invention is described in detail, it should be noted that in the following description, similar elements are denoted by the same numerals.

Referring to FIG. 1 and FIG. 2 , a first embodiment of the energy-saving driving generator of the present invention is applicable to a driving power supply (not shown).

The first embodiment includes a casing 1 , a drive unit 2 , two power generation units 3 , and a coolant 4 .

The housing 1 extends along a length direction D1 and defines a chamber 10 . The casing 1 includes an outer cylinder 11 penetrating along the length direction D1, an inner cylinder 13 penetrating through the length direction D1 and located in the outer cylinder 11 and spaced from the outer cylinder 11, two side covers 12 covering both sides of the outer cylinder 11 and the inner cylinder 13 along the length direction D1, and a plurality of stoppers 14 fixed to the inner peripheral surface of the inner cylinder 13. The inner cylinder 13 and the side covers 12 jointly define the chamber 10. The barrel 11 , the inner barrel 13 and the side covers 12 jointly define a cooling chamber 16 for the cooling liquid 4 to accelerate the dissipation of heat. The limiting members 14 clamp the driving unit 2 and the generating units 3 together.

Referring to FIG. 1, FIG. 4 and FIG. 5, the drive unit 2 includes a main stator module 21 located in the chamber 10 and fixed to the housing 1, and two first rotor modules 22 located in the chamber 10 and located on two opposite sides of the main stator module 21 along the length direction D1.

Referring to FIG. 3 and FIG. 5 , the main stator module 21 has a ring-shaped main ring support 211 , a plurality of main coil sets 214 affixed to the main ring support 211 , and a driving input terminal 215 electrically connected to the main coil sets 214 . In the first embodiment, the number of the main coil groups 214 is nine.

The main annular support 211 has a main through hole 212 penetrating along the length direction D1 , and a main inner ring surface 213 defining the main through hole 212 . The main ring bracket 211 is clamped and positioned on the inner barrel 13 by the limiting members 14 , thereby positioning the main stator module 21 .

Each first rotor module 22 has a ring-shaped first ring frame 221 and a plurality of first magnetic elements 224 fixed on the first ring frame 221 . In the first embodiment, the number of the first magnetic elements 224 is 12.

Each first annular bracket 221 has a first through hole 222 penetrating along the length direction D1, and a plurality of openings 223 penetrating along the length direction D1. In the first embodiment, the number of the openings 223 is twelve.

The first magnetic pieces 224 are respectively located in the openings 223 to be fixedly connected to the corresponding first ring brackets 221 , and the first magnetic pieces 224 are adjacent to the main coil sets 214 .

It is worth mentioning that the first magnetic components 224 of one of the first rotor modules 22 are magnetically opposite to the first magnetic components 224 of the other first rotor module 22 . In other words, if the magnetic pole of one of the first magnetic components 224 of one of the first rotor modules 22 facing the corresponding main coil set 214 is the S pole, the corresponding first magnetic component 224 of the other first rotor module 22 is facing the corresponding magnetic pole of the main coil set 214 is the N pole.

The driving input end 215 is used to electrically connect the driving power, so that the main coil sets 214 generate a magnetic field, so that the first magnetic parts 224 of the first rotor modules 22 are driven by the magnetic field generated by the main coil sets 214 to drive the first annular supports 221 to rotate.

Referring to FIG. 1 and FIG. 2 , the generating units 3 are located in the housing chamber 10 and are respectively located on two opposite sides of the driving unit 2 along the length direction D1 . It should be noted that, in order to briefly describe the arrangement relationship between the power generating units 3 and the drive unit 2 , the following description uses one of the power generating units 3 for illustration, but there are two power generating units 3 in the drawings.

Referring to FIG. 3 and FIG. 5 , the power generation unit 3 includes a second rotor module 31 fixedly connected to the respective first annular support 221, a third rotor module 32 spaced apart from the respective first annular support 221 along the length direction D1 away from the main annular support 211, a secondary stator module 33 disposed between the second rotor module 31 and the third rotor module 32 along the length direction D1 at intervals, and a second stator module 33 disposed between the second rotor module 31 and the third rotor module 32 along the length direction D1, and a second stator module 33 passing through the respective first annular rotor support 221 and the third module. The set 32 and the rotating shaft 34 of the sub-stator module 33 , a first bearing set 35 disposed between the sub-stator module 33 and the rotating shaft 34 , and two rotating shaft seats 36 fixedly connected to the rotating shaft 34 .

Referring to FIG. 3 , FIG. 5 and FIG. 6 , the second rotor module 31 has a plurality of second magnetic members 311 opposite to the corresponding first magnetic members 224 of the first rotor module 22 and fixedly connected to the corresponding first annular bracket 221 . In the first embodiment, the number of the second magnetic elements 311 is 12.

The number of the second magnetic pieces 311 is the same as the number of the corresponding first magnetic pieces 224 of the first rotor module 22 , and is the same as the number of the corresponding openings 223 of the first ring support 221 . Each second magnetic piece 311 and the corresponding first magnetic piece 224 are located in the respective openings 223 along the length direction D1, and are fixedly connected to the corresponding first ring bracket 221 . In addition, in this embodiment, each first magnetic piece 224 is integrally formed with the respective second magnetic piece 311 , that is, a single permanent magnet passes through the respective opening 223 to be fixedly connected to the corresponding first ring bracket 221 .

The third rotor module 32 has a ring-shaped third ring frame 321 and a plurality of third magnetic elements 323 fixedly connected to the third ring frame 321 . In the first embodiment, the number of the third magnetic elements 323 is 12.

The third ring bracket 321 has a third through hole 322 extending along the length direction D1.

The third magnetic pieces 323 are disposed opposite to the corresponding second magnetic pieces 311 of the second rotor module 31 along the length direction D1 , and are magnetically opposite to each other. In other words, if the magnetic pole of one of the third magnetic elements 323 facing the corresponding second magnetic element 311 is the S pole, the corresponding magnetic pole of the second magnetic element 311 facing the third magnetic element 323 is the N pole.

The secondary stator module 33 has a ring-shaped secondary ring frame 331 , a plurality of secondary coil sets 334 fixedly connected to the secondary ring frame 331 , and a generator output terminal 335 electrically connected to the secondary coil sets 334 . In the first embodiment, the number of the secondary coil groups 334 is 18.

The secondary annular support 331 has a secondary through hole 332 penetrating along the length direction D1 , and a secondary inner ring surface 333 defining the secondary through hole 332 . The sub-annular brackets 331 are clamped and positioned on the inner cylinder 13 by the limiting members 14 , thereby positioning the sub-stator modules 33 .

The rotating shaft 34 passes through the first through hole 222 and the third through hole 322 respectively and is fixedly connected to the first annular support 221 and the third annular support 321 respectively.

The first bearing group 35 has a positioning block 351 fixed to the respective secondary inner ring surface 333 and penetrating along the length direction D1, two first bearing elements 352 positioned between the positioning block 351 and the rotating shaft 34, and two clamping pieces 355 arranged on both sides of the positioning block 351 corresponding to the secondary through holes 332 along the length direction D1 and facing against the first bearing elements 352. 4, and a first outer bearing surface 354 opposite to the first inner bearing surface 353 and fixed to the positioning block 351. The clamping pieces 355 can jointly limit the positioning block 351 on the secondary through hole 332 .

One of the rotating shaft seats 36 is fixedly connected to the rotating shaft 34 and the third ring frame 321 , and the other of the rotating shaft seats 36 is fixedly connected to the rotating shaft 34 and the first ring frame 221 . More precisely, one of the shaft seats 36 locks the rotation shaft 34 in the radial direction, and locks the third ring bracket 321 in the axial direction. The other one of the rotating shaft seats 36 locks the rotating shaft 34 in the radial direction, and locks the first ring bracket 221 in the axial direction.

Therefore, the rotating shaft 34 can be positioned in the secondary through hole 332 and the first bearings 352 without offset, and the friction force during rotation can be reduced through the first bearings 352 .

Referring to FIG. 3 , FIG. 5 and FIG. 6 , in actual use, the driving unit 2 will drive the generating units 3 to generate electricity. More precisely, when the driving power supplies electric energy to the main coil sets 214, the main coil sets 214 generate a magnetic field to interact with the first magnetic members 224 of each first rotor module 22, thereby driving the first annular support 221 of each first rotor module 22 to rotate, thereby driving the respective rotating shaft 34 and the respective third rotor module 32 to rotate relative to the respective sub-stator modules 33, thereby making the respective sub-stator modules 33 of the respective sub-stator modules 33 rotate. The secondary coil set 334 cuts the magnetic fields generated by the second magnetic elements 311 of the second rotor module 31 and the third magnetic elements 323 of the third rotor module 32 respectively, so that the secondary coil sets 334 generate induced currents and output them at the power generation output terminals 335 respectively.

It is worth mentioning that, in the variation of the first embodiment, the number of the power generating units 3 is not limited to two, and may also be a multiple of two. For example, if the number of the generating units 3 is four, based on the first embodiment, two generating units 3 are added on both sides of the first embodiment along the longitudinal direction D1, and the added second rotor modules 31 will be respectively installed on the original two and third annular brackets 321. At this time, the second and second rotor modules 31 and the original second and third rotor modules 32 are provided with the original second and third annular brackets 321 , which also has the effect of improving energy conversion efficiency and reducing the overall required cost.

Referring to FIG. 7 and FIG. 8 , a second embodiment of the energy-saving driving generator of the present invention is applicable to the driving power supply (not shown).

However, the difference between the second embodiment and the first embodiment is as follows.

First, in the second embodiment, the side covers 12 respectively have two side holes 121 , and two side ring surfaces 122 respectively defining the side holes 121 .

Moreover, the casing 1 also includes two second bearings 15 respectively located in the side holes 121 and sleeved on the rotating shafts 34 respectively. Each second bearing 15 is disposed between the respective side ring surfaces 122 and the respective rotating shafts 34. Each second bearing 15 has a second inner bearing surface 151 fixed to the respective rotating shaft 34, and a second outer bearing surface 15 opposite to the second inner bearing surface 151 and fixed to the respective side ring surface 122. 2. In the second embodiment, the side holes 121 are all blind holes and are adjacent to the chamber 10 .

The driving unit 2 includes the main stator module 21 , the first rotor modules 22 , and a linkage shaft 23 passing through the main through hole 212 of the main stator module 21 and fixedly connected between the rotating shafts 34 . In the second embodiment, the rotating shafts 34 and the linkage shaft 23 are integrally formed.

Since the rotating shafts 34 and the interlocking shaft 23 are fixedly connected to each other, the rotating shafts 34 and the interlocking shaft 23 can be co-located in the second bearings 15 without offset, and the friction force during rotation can be reduced through the second bearings 15.

In other words, in the second embodiment, the first bearings 352 are not necessary components (as shown in FIG. 3 ), and the rotating shafts 34 and the interlocking shaft 23 can only pass through the second bearings 15 to produce the same positioning and friction reduction effects as the first embodiment.

Therefore, the energy-saving drive generator of the present invention can summarize the following effects:

(1) The energy-saving drive generator of the present invention, by arranging the first magnetic parts 224 of each first rotor module 22 and the second magnetic parts 311 of the corresponding second rotor module 31 on the corresponding first ring support 221, effectively simplifies the structure of the drive unit 2 and the power generation units 3, so the energy-saving drive generator of the present invention can simultaneously have the effect of improving energy conversion efficiency and reducing the overall required cost.

(2) The energy-saving drive generator of the present invention, by the outer tube 11, the inner tube 13 and the side covers 12 jointly defining the cooling chamber 16 for the cooling liquid 4 to accelerate the dissipation of the heat generated by the drive unit 2 and the power generation units 3 during operation.

(3) The energy-saving driving generator of the present invention, by positioning the rotating shaft 34 in the first bearings 352 , no deviation will occur, and the friction force during rotation can be reduced through the first bearings 352 .

(4) The energy-saving drive generator of the present invention, by co-locating the rotating shafts 34 and the interlocking shaft 23 in the second bearings 15, no offset will occur, and the friction force during rotation can be reduced through the second bearings 15.

To sum up, the energy-saving drive generator of the present invention, by providing the first ring brackets 221 and other mechanisms, can improve the energy conversion efficiency, reduce the overall required cost, and reduce the friction force generated by the relative rotation of the rotating shafts 34, etc., and the purpose of the present invention can indeed be achieved.

But the above are only embodiments of the present invention, and should not limit the scope of the present invention. All simple equivalent changes and modifications made according to the patent scope of the present invention and the content of the patent specification are still within the scope of the patent of the present invention.

1: shell 10: Containment room 11: Outer cylinder 12: side cover 121: side hole 122: side annulus 13: Inner cylinder 14: Limiting parts 15: The second bearing 151: Second inner bearing surface 152: Second outer bearing surface 16: Cooling room 2: Drive unit 21: Main stator module 211: main ring bracket 212: main perforation 213: Main inner ring surface 214: Main coil group 215: drive input terminal 22: The first rotor module 221: The first ring bracket 222: First piercing 223: opening 224: The first magnetic piece 23: Linkage shaft 3: Power generation unit 31: Second rotor module 311: the second magnetic part 32: The third rotor module 321: The third ring bracket 322: The third piercing 323: The third magnetic piece 33: Secondary stator module 331: secondary ring bracket 332: secondary perforation 333: sub-inner torus 334: secondary coil group 335: Generating output terminal 34: Rotation axis 35: The first bearing group 351: positioning block 352: The first bearing 353: the first inner bearing surface 354: the first outer bearing surface 355: clamping piece 36: shaft seat 4: Coolant D1: Length direction

Other features and effects of the present invention will be clearly presented in the implementation manner with reference to the drawings, wherein: Fig. 1 is a three-dimensional assembled view of a first embodiment of an energy-saving drive generator of the present invention; Fig. 2 is a three-dimensional exploded view of the first embodiment; Fig. 3 is a partial perspective exploded view of the first embodiment with a shell removed; Fig. 4 is a side view combined view of the first embodiment; Fig. 5 is a side view combined view of the first embodiment after removing the shell; Fig. 6 is an exploded side view of the first embodiment with the casing removed; Fig. 7 is a partial side exploded view of a second embodiment of the energy-saving drive generator of the present invention; and Fig. 8 is a combined side view of the second embodiment with the casing removed.

2: Drive unit

21: Main stator module

211: main ring bracket

212: main perforation

213: Main inner ring surface

214: Main coil group

215: drive input terminal

22: The first rotor module

221: The first ring bracket

222: First piercing

223: opening

3: Power generation unit

31: Second rotor module

311: the second magnetic part

32: The third rotor module

321: The third ring bracket

322: The third piercing

323: The third magnetic piece

33: Secondary stator module

331: secondary ring bracket

332: secondary perforation

333: sub-inner torus

334: secondary coil group

335: Generating output terminal

34: Rotation axis

35: The first bearing group

351: positioning block

352: The first bearing

353: the first inner bearing surface

354: the first outer bearing surface

355: clamping piece

36: shaft seat

D1: Length direction

Claims (9)

An energy-saving drive generator suitable for a drive power supply, the energy-saving drive generator includes: a shell extending along a length direction and defining a chamber; A drive unit, including a main stator module located in the chamber and fixed to the housing, and two first rotor modules located in the chamber and located on two opposite sides of the main stator module along the length direction, the main stator module has a ring-shaped main ring support, a plurality of main coil groups fixed to the main ring support, and a drive input end electrically connected to the main coil groups, the main ring support has a main through hole penetrating along the length direction, and each first rotor module has a ring A first ring-shaped bracket, and a plurality of first magnetic parts fixed to the first ring bracket, the first ring bracket has a first through hole penetrating along the length direction, and the first magnetic parts are adjacent to the main coil groups, and the drive input end is used to electrically connect the drive power supply to provide electrical energy to the main coil groups; and Two power generation units are located in the chamber and are respectively located on two opposite sides of the drive unit along the length direction. Each power generation unit includes a second rotor module, a third rotor module spaced away from the main annular support along the length direction and spaced apart from the respective first ring support, a secondary stator module spaced between the second rotor module and the third rotor module along the length direction, and a rotating shaft. The second magnetic part of the ring support, each third rotor module has a ring-shaped third ring support, and a plurality of third magnetic parts fixed to the third ring support, the third ring support has a third through hole penetrating along the length direction, the third magnetic parts of each third rotor module are arranged opposite to the second magnetic parts of the corresponding second rotor module along the length direction and are magnetically opposed to each other, each stator module has a ring-shaped sub ring support, a plurality of secondary coil groups fixed to the sub ring support, and a Electrically connected to the power generation output ends of the secondary coil sets, each primary annular support has a secondary through hole penetrating along the length direction, each rotating shaft passes through the respective first through hole and the third through hole and is fixedly connected to the respective first annular support and the third annular support, and each rotating shaft passes through the respective secondary through hole and is rotatably arranged on the respective secondary annular support, when the driving power supplies electric energy to the primary coil sets, the primary coil sets generate a magnetic field to generate magnetic force with the first magnetic parts of each first rotor module function, and then drive the first annular support of each first rotor module to rotate, and drive the respective rotation shaft and the respective third rotor module to rotate relative to the respective sub-stator modules, and then make the respective sub-stator modules The sub-coil groups cut the magnetic fields generated by the respective second rotor modules of the respective second rotor modules and the respective third rotor modules The magnetic fields generated by the respective third rotor modules generate induced currents and output them at the respective output terminals of the power generation. The energy-saving drive generator as described in Claim 1, wherein, the sub-annular support of each primary stator module also has a sub-inner ring surface that defines the sub-perforation, each power generation unit also includes a first bearing group disposed between the sub-stator module and the rotating shaft, each first bearing group has a positioning block that is fixed to the respective sub-inner ring surface and penetrates along the length direction, two first bearing parts that are positioned between the positioning block and the rotating shaft, and two covers are arranged on both sides of the positioning block along the length direction and snap against each other For the clamping pieces of the first bearing pieces, each first bearing piece has a first inner bearing surface fixed to the rotating shaft, and a first outer bearing surface opposite to the first inner bearing surface and fixed to the positioning block. The energy-saving drive generator as described in Claim 1, wherein the casing includes an outer cylinder penetrating along the length direction, and two side covers arranged on both sides of the outer cylinder along the length direction, each side cover has a side hole, and a side ring surface defining the side hole, the main annular support of the main stator module also has a main inner ring surface defining the main through hole, the drive unit also includes a linkage shaft passing through the main through hole and fixed between the rotating shafts, and the casing also includes two positions respectively The side holes are respectively sleeved on the second bearing parts of the rotating shafts. Each second bearing part is arranged between the respective side ring surface and the respective rotating shaft. Each second bearing part has a second inner bearing surface fixed to the respective rotating shaft, and a second outer bearing surface opposite to the second inner bearing surface and fixed to the respective side ring surface. The energy-saving drive generator as claimed in claim 3, wherein the rotating shafts and the linkage shaft are integrally formed. The energy-saving drive generator according to claim 1, wherein the casing includes an outer cylinder penetrating along the length direction, an inner cylinder penetrating through the length direction and located in the outer cylinder and spaced from the outer cylinder, and two side covers arranged on both sides of the outer cylinder and the inner cylinder along the length direction, and the inner cylinder and the side covers jointly define the chamber. The energy-saving drive generator as described in Claim 5, wherein the housing further includes a plurality of stoppers fixedly connected to the inner peripheral surface of the inner cylinder, and the stoppers jointly clamp the main annular support and the secondary annular supports to position the main stator module and the secondary stator modules, and the outer cylinder, the inner cylinder and the side covers jointly define a cooling chamber. The energy-saving driving generator as claimed in claim 6 further includes a cooling liquid located in the cooling chamber. The energy-saving drive generator as described in Claim 1, wherein each first annular support further has a plurality of openings penetrating along the length direction, the number of the first magnetic parts of each first rotor module is the same as the number of the second magnetic parts of the corresponding second rotor module, and the same as the number of openings of the corresponding first annular support, each first magnetic part and the corresponding second magnetic part are located in the respective openings along the length direction, and are fixed to the corresponding first annular support. The energy-saving driving generator as claimed in item 8, wherein each first magnetic part is integrally formed with the respective second magnetic part.

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