CN111130272A - Low-noise direct current motor and use method thereof - Google Patents
Low-noise direct current motor and use method thereof Download PDFInfo
- Publication number
- CN111130272A CN111130272A CN202010003609.XA CN202010003609A CN111130272A CN 111130272 A CN111130272 A CN 111130272A CN 202010003609 A CN202010003609 A CN 202010003609A CN 111130272 A CN111130272 A CN 111130272A
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- fixedly connected
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- low
- noise
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- 238000000034 method Methods 0.000 title claims abstract description 21
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 11
- 229910052782 aluminium Inorganic materials 0.000 claims description 11
- 239000011888 foil Substances 0.000 claims description 11
- 230000002441 reversible effect Effects 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 claims description 3
- 230000003313 weakening effect Effects 0.000 claims description 3
- 239000000314 lubricant Substances 0.000 claims 1
- 230000003472 neutralizing effect Effects 0.000 claims 1
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 22
- 238000004519 manufacturing process Methods 0.000 description 6
- 230000003139 buffering effect Effects 0.000 description 4
- 239000007787 solid Substances 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 2
- 239000010687 lubricating oil Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000030279 gene silencing Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
Images
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/02—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for suppression of electromagnetic interference
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/30—Structural association with control circuits or drive circuits
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/30—Structural association with control circuits or drive circuits
- H02K11/35—Devices for recording or transmitting machine parameters, e.g. memory chips or radio transmitters for diagnosis
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
- H02K5/161—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields radially supporting the rotary shaft at both ends of the rotor
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/24—Casings; Enclosures; Supports specially adapted for suppression or reduction of noise or vibrations
Abstract
The invention discloses a low-noise direct current motor and a using method thereof, relates to the technical field of motor design, and aims at the problem of noise generation of the existing motor, the invention provides a scheme which comprises a machine shell, wherein a rotating shaft is fixedly connected in the middle of the machine shell, a rotor is fixedly connected to the outer wall of the rotating shaft, a fixing pad fixedly connected with the machine shell is arranged on the outer side of the rotor, a stator is fixedly connected to the outer wall of the fixing pad, a plurality of connecting devices are fixedly connected to the outer wall of the machine shell, a fixing ring is fixedly connected to one side of each connecting device, and a harmonic generator is fixedly connected to the inner wall of the fixing ring. The service life of the motor is prolonged, and the use cost is reduced.
Description
Technical Field
The invention relates to the technical field of motor design, in particular to a low-noise direct current motor and a using method thereof.
Background
The direct current motor is a motor which converts direct current electric energy into mechanical energy, is widely applied to electric dragging due to good speed regulation performance, and in the working process, a stator iron core and a machine base periodically deform along with time due to radial force which changes along with time and space generated by the interaction of magnetic fields in an air gap of the motor, namely, the stator vibrates; the electromagnetic noise is mainly due to the fact that the vibration of the stator causes the pulsation of surrounding air to cause airborne noise, mechanical vibration and noise generated by centrifugal force caused by the mechanical unbalance of the rotor, bearing vibration noise, sliding contact noise of an electric brush and a collecting ring or a commutator, and axial vibration noise of an end cover excited by the vibration of the bearing can cause larger noise of the motor, so that the targeted improvement is needed, the vibration of the whole motor in the working process is reduced, the noise is reduced, and the mute environment is adapted.
Disclosure of Invention
The invention provides a low-noise direct current motor and a using method thereof, which solve the problem of noise generated by the motor.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a low noise direct current motor, includes the casing, the middle fixedly connected with pivot of casing, the outer wall fixedly connected with rotor of pivot, the rotor outside is provided with the fixed bolster with casing fixed connection, the outer wall fixedly connected with stator of fixed bolster, a plurality of connecting device of outer wall fixedly connected with of casing, one side fixedly connected with retainer plate of connecting device, the inner wall fixedly connected with harmonic generator of retainer plate, one side fixedly connected with of casing has photoelectric sensor, there is controlling means one side of casing through the connection of electric lines, one side fixedly connected with oil tank of casing, the honeycomb duct that one side fixedly connected with of oil tank and bearing are linked together.
Preferably, the fixing pad comprises an outermost rubber layer, an aluminum foil layer is fixedly connected to the inner side of the rubber layer, and a shielding net is fixedly connected to the inner side of the aluminum foil layer.
Preferably, the connecting device comprises a fixed cylinder fixedly connected with the casing, a connecting rod fixedly connected with the fixed ring is sleeved in the fixed cylinder in a sliding manner, a volume cavity is arranged in the fixed cylinder, and high-pressure oil is filled in the volume cavity.
Preferably, the control device comprises an outer control box, and a controller, an electronic switching device and a memory are fixedly connected in the control box.
Preferably, the flow guide pipe is connected with a flow control valve, and the flow guide pipe adopts a Z-shaped structure.
Preferably, one side of the oil tank is fixedly connected with an oil inlet pipe, and the oil inlet pipe is connected with a valve.
A use method of a low-noise direct current motor comprises the following steps:
s1, sequentially mounting the rotating shaft, the rotor, the fixed pad and the stator on the shell for fixing, then sleeving the fixed ring on the shell, extruding the connecting device between the shell and the fixed ring through a tool, and then fixing;
s2: connecting the device in the step S1 to a control device through a wire, inputting a control program to a controller through an external computer, and switching on a power supply to work the motor;
s3: when the electric switch device works, the controller controls the electronic switch device, controls the current frequency introduced into the rotor, controls the rotating speed, and controls signals received by the photoelectric sensor, the controller controls the harmonic generator to generate low-intensity reverse electromagnetic wave signals, and the low-intensity reverse electromagnetic wave signals are neutralized with electromagnetic wave signals generated by the rotor, and the electromagnetic wave signals generated by the rotor are subjected to double shielding and weakening through the aluminum foil layer and the shielding net in the transmission process, so that the influence on the shell is reduced, and the vibration caused by the heavy load of the rotor or the output end is absorbed and buffered through high-pressure oil in the connecting device, so that the energy of the vibration is reduced;
s4: in the continuous working process, the bearing is lubricated by generating certain negative pressure due to the rotation of the bearing driven by the rotating shaft and oiling the bearing through the guide pipe and the oil tank.
Preferably, the amount of the lubricating oil added in step S4 is determined according to the number of revolutions of the rotary shaft and the output heavy load, and the flow control valve is controlled.
The invention has the beneficial effects that:
1: through the energy absorption and the buffering of connecting device and fixed bolster, reduce the production of vibrations, through the production of harmonic simultaneously, reduce the electromagnetic energy to make whole device offset or absorb at the produced mechanical energy of working process, and then reduce the energy of vibrations, and then the production of noise reduction guarantees the work of device silence.
2: through mutually supporting of different devices, when can reduce vibrations, carry out the maintenance that fluid added, and then carried out certain maintenance work to the motor in the course of the work, and then prolonged the life of motor, reduce use cost.
Drawings
FIG. 1 is a schematic cross-sectional front view of a low noise DC motor and a method for using the same according to the present invention;
FIG. 2 is a schematic left-side cross-sectional view of a low-noise DC motor and a method for using the same according to the present invention;
FIG. 3 is a schematic cross-sectional front view of a connecting device of a low-noise DC motor and a method for using the same according to the present invention;
FIG. 4 is a schematic cross-sectional front view of a control device for a low-noise DC motor and a method for using the same according to the present invention;
FIG. 5 is a schematic view of a fixing pad structure of a low-noise DC motor and a method for using the same according to the present invention;
fig. 6 is a connection diagram of a low-noise dc motor and a method for using the same according to the present invention.
Reference numbers in the figures: the device comprises a machine shell 1, a control device 2, a photoelectric sensor 3, a connecting device 4, a fixing ring 5, a harmonic generator 6, a fixing pad 7, a stator 8, an oil tank 9, a flow guide pipe 10, a rotating shaft 11, a rotor 12, a control box 21, an electronic switching device 22, a controller 23, a memory 24, a fixing cylinder 41, a volume cavity 42, a connecting rod 43, a rubber layer 71, an aluminum foil layer 72 and a shielding net 73.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Referring to fig. 1-6, a low noise dc motor includes a housing 1, a rotating shaft 11 fixedly connected to the middle of the housing 1, a rotor 12 fixedly connected to the outer wall of the rotating shaft 11, a fixing pad 7 fixedly connected to the housing 1 and disposed on the outer side of the rotor 12, a stator 8 fixedly connected to the outer wall of the fixing pad 7, a plurality of connecting devices 4 fixedly connected to the outer wall of the housing 1, a fixing ring 5 fixedly connected to one side of the connecting devices 4, a harmonic generator 6 fixedly connected to the inner wall of the fixing ring 5, a photoelectric sensor 3 fixedly connected to one side of the housing 1, a control device 2 connected to one side of the housing 1 through an electric wire, an oil tank 9 fixedly connected to one side of the housing 1, a flow guide tube 10 connected to a bearing and fixedly connected to one side of the oil tank 9, wherein, during operation, the control device 2 controls the device 12, through the effect with between the stator 8, guarantee the rotation of pivot 11, in the course of the work, carry out certain buffering through connecting device 4 and fixed bolster 7, carry out the shielding of signal through fixed bolster 7 simultaneously, guarantee to reduce the vibrations that casing 1 or other soft magnetic materials said to take place, the production of noise abatement, simultaneously through controlling means 2's control, avoid the use of brush, reduce the produced impulsive sound of brush, here through the oil feed of oil tank 9 to honeycomb duct 10, reduce the produced noise of bearing friction, in this process, harmonic generator 6 is through controlling means 2's control, carry out the cancellation of electromagnetic wave, reduce the electromagnetic energy and to the produced vibrations of attraction and the extrusion of soft magnetic device, and then reduced the produced noise of motor work, guarantee the pivoted environment.
The fixing pad 7 includes an outermost rubber layer 71, an aluminum foil layer 72 is fixedly connected to an inner side of the rubber layer 71, and a shielding net 73 is fixedly connected to an inner side of the aluminum foil layer 72, and is buffered by the rubber layer 71 to a certain extent, and is electromagnetically shielded by the aluminum foil layer 72 and the shielding net 73.
Connecting device 4 includes the solid fixed cylinder 41 with casing 1 fixed connection, and sliding sleeve has the connecting rod 43 with 5 fixed connection of retainer plate in the solid fixed cylinder 41, is provided with volume chamber 42 in the solid fixed cylinder 41, and volume chamber 42 intussuseption is filled with high pressure oil, through the buffering of high pressure oil, can convert the mechanical energy of impact into internal energy, reduces the production of shaking, the production of noise abatement.
The control device 2 comprises a control box 21 on the outer side, a controller 23, an electronic switching device 22 and a memory 24 are fixedly connected in the control box 21, the direction of current is changed through the electronic switching device 22, the rotating work is guaranteed, and meanwhile, the control is carried out through the controller 23.
The flow control valve is connected to the flow guide pipe 10, the flow guide pipe 10 is of a Z-shaped structure, an oil inlet pipe is fixedly connected to one side of the oil tank 9, a valve is connected to the oil inlet pipe, and the oil inlet pipe is used for inputting oil.
A use method of a low-noise direct current motor comprises the following steps:
s1, the rotating shaft 11, the rotor 12, the fixing pad 7 and the stator 8 are sequentially installed on the machine shell 1 to be fixed, then the fixing ring 5 is sleeved on the rotating shaft, the connecting device 4 is extruded and installed between the machine shell 1 and the fixing ring 5 through a tool to be fixed, and after the fixing is finished, the device can work.
S2: the device in step S1 is connected to the control device 2 by an electric wire, and a control program is input to the controller 23 via an external computer, and the power is turned on to perform the operation of the motor, and the control of the whole device is performed via the control program, thereby ensuring the generation of subsequent harmonics and the completion of speed regulation.
S3: when the machine works, the controller 23 controls the electronic switching device 22 to control the frequency of current introduced into the rotor 12 and control the rotating speed, and signals received by the photoelectric sensor 3 pass through, the controller 23 controls the harmonic generator 6 to generate low-intensity reverse electromagnetic wave signals, the low-intensity reverse electromagnetic wave signals are neutralized with electromagnetic wave signals generated by the rotor 12, the electromagnetic wave signals generated by the rotor 12 are subjected to double shielding and weakening through the aluminum foil layer 72 and the shielding net 73 in the transmission process to reduce the influence on the machine shell 1, vibration caused by the heavy load of the rotor 12 or the output end again passes through high-pressure oil in the connecting device to be subjected to energy absorption and buffering, the energy of the vibration is reduced, and the noise of the machine can reach the minimum state through multiple energy dissipation and silencing treatment.
S4: in the continuous process of work, because the rotation of the bearing that pivot 11 drove produces certain negative pressure, refuels through honeycomb duct 10 and oil tank 9 and handles, lubricates the bearing, and the noise that the friction produced is reduced in the lubrication.
The amount of the lubricating oil added in step S4 is determined according to the number of rotations of the rotary shaft 11 and the output heavy load, and the flow rate control valve is controlled.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (8)
1. The low-noise direct current motor comprises a casing (1) and is characterized in that a rotating shaft (11) is fixedly connected in the middle of the casing (1), a rotor (12) is fixedly connected to the outer wall of the rotating shaft (11), a fixing pad (7) fixedly connected with the casing (1) is arranged on the outer side of the rotor (12), a stator (8) is fixedly connected to the outer wall of the fixing pad (7), a plurality of connecting devices (4) are fixedly connected to the outer wall of the casing (1), a fixing ring (5) is fixedly connected to one side of each connecting device (4), a harmonic generator (6) is fixedly connected to the inner wall of each fixing ring (5), a photoelectric sensor (3) is fixedly connected to one side of the casing (1), one side of the casing (1) is connected with a control device (2) through an electric wire, an oil tank (9) is fixedly connected to one side of the casing (1, and one side of the oil tank (9) is fixedly connected with a flow guide pipe (10) communicated with the bearing.
2. A low noise dc motor according to claim 1, wherein the fixing pad (7) comprises an outermost rubber layer (71), an aluminum foil layer (72) is fixedly connected to an inner side of the rubber layer (71), and a shielding mesh (73) is fixedly connected to an inner side of the aluminum foil layer (72).
3. The low-noise direct-current motor according to claim 1, wherein the connecting device (4) comprises a fixed cylinder (41) fixedly connected with the housing (1), a connecting rod (43) fixedly connected with the fixed ring (5) is slidably sleeved in the fixed cylinder (41), a volume cavity (42) is arranged in the fixed cylinder (41), and the volume cavity (42) is filled with high-pressure oil.
4. A low noise direct current motor according to claim 1, characterized in that said control means (2) comprises an outer control box (21), said control box (21) having fixedly connected therein a controller (23), an electronic switching device (22) and a memory (24).
5. A low noise dc motor according to claim 1, wherein a flow control valve is connected to the flow guide tube (10), and the flow guide tube (10) has a zigzag structure.
6. A low noise dc motor according to claim 1, wherein an oil inlet pipe is fixedly connected to one side of the oil tank (9), and a valve is connected to the oil inlet pipe.
7. The use method of the low-noise direct current motor is characterized by comprising the following steps of:
s1, sequentially mounting the rotating shaft (11), the rotor (12), the fixing pad (7) and the stator (8) on the machine shell (1) for fixing, then sleeving the fixing ring (5), extruding and mounting the connecting device (4) between the machine shell (1) and the fixing ring (5) through a tool, and then fixing;
s2: connecting the device in the step S1 to a control device (2) through a wire, inputting a control program to a controller (23) through an external computer, and switching on a power supply to operate a motor;
s3: when the machine works, the controller (23) is used for controlling the electronic switching device (22), controlling the frequency of current introduced into the rotor (12), controlling the rotating speed, and controlling the harmonic generator (6) through signals received by the photoelectric sensor (3), the controller (23) is used for generating low-intensity reverse electromagnetic wave signals, neutralizing the electromagnetic wave signals generated by the rotor (12), and the electromagnetic wave signals generated by the rotor (12) are subjected to double shielding and weakening through the aluminum foil layer (72) and the shielding net (73) in the transmission process to reduce the influence on the machine shell (1), and the vibration caused by the heavy load of the rotor (12) or the output end is absorbed and buffered through high-pressure oil in the connecting device to reduce the vibration energy;
s4: in the continuous working process, the bearing is lubricated by generating certain negative pressure due to the rotation of the bearing driven by the rotating shaft (11) and performing oiling treatment through the guide pipe (10) and the oil tank (9).
8. The method of claim 7, wherein the amount of the lubricant added in step S4 is determined according to the number of rotations of the rotating shaft (11) and the heavy load of the output, and the flow control valve is controlled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010003609.XA CN111130272B (en) | 2020-01-03 | 2020-01-03 | Low-noise direct current motor and use method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010003609.XA CN111130272B (en) | 2020-01-03 | 2020-01-03 | Low-noise direct current motor and use method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111130272A true CN111130272A (en) | 2020-05-08 |
| CN111130272B CN111130272B (en) | 2021-11-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN202010003609.XA Expired - Fee Related CN111130272B (en) | 2020-01-03 | 2020-01-03 | Low-noise direct current motor and use method thereof |
Country Status (1)
| Country | Link |
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| CN (1) | CN111130272B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1429071A (en) * | 2001-12-26 | 2003-07-09 | 神达电脑股份有限公司 | Electromagnetic interference bucking circuit with phase-shifting unit |
| CN101356716A (en) * | 2005-12-14 | 2009-01-28 | 李玉宰 | Constant-power brushless DC motor and generator |
| CN102324822A (en) * | 2011-10-17 | 2012-01-18 | 永济新时速电机电器有限责任公司 | Variable frequency speed control three-phase asynchronous motor for high-speed rolling test bed |
| CN204886501U (en) * | 2015-08-05 | 2015-12-16 | 泰州市汇宇不锈钢有限公司 | Flame -proof type motor |
| CN107834913A (en) * | 2017-11-24 | 2018-03-23 | 安徽黄河水处理科技股份有限公司 | A kind of solar energy brushless controller |
| CN208241453U (en) * | 2018-04-08 | 2018-12-14 | 东莞市天一精密机电有限公司 | A kind of improved motor |
| CN208508704U (en) * | 2018-07-11 | 2019-02-15 | 惠州市博晟电机有限公司 | A kind of permanent magnet DC motor on electric folding curtain and office furniture driving |
| CN209016862U (en) * | 2018-12-08 | 2019-06-21 | 丁强 | A kind of noise reduction shock-absorbing type three-phase motor |
-
2020
- 2020-01-03 CN CN202010003609.XA patent/CN111130272B/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1429071A (en) * | 2001-12-26 | 2003-07-09 | 神达电脑股份有限公司 | Electromagnetic interference bucking circuit with phase-shifting unit |
| CN101356716A (en) * | 2005-12-14 | 2009-01-28 | 李玉宰 | Constant-power brushless DC motor and generator |
| CN102324822A (en) * | 2011-10-17 | 2012-01-18 | 永济新时速电机电器有限责任公司 | Variable frequency speed control three-phase asynchronous motor for high-speed rolling test bed |
| CN204886501U (en) * | 2015-08-05 | 2015-12-16 | 泰州市汇宇不锈钢有限公司 | Flame -proof type motor |
| CN107834913A (en) * | 2017-11-24 | 2018-03-23 | 安徽黄河水处理科技股份有限公司 | A kind of solar energy brushless controller |
| CN208241453U (en) * | 2018-04-08 | 2018-12-14 | 东莞市天一精密机电有限公司 | A kind of improved motor |
| CN208508704U (en) * | 2018-07-11 | 2019-02-15 | 惠州市博晟电机有限公司 | A kind of permanent magnet DC motor on electric folding curtain and office furniture driving |
| CN209016862U (en) * | 2018-12-08 | 2019-06-21 | 丁强 | A kind of noise reduction shock-absorbing type three-phase motor |
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| CN111130272B (en) | 2021-11-09 |
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Granted publication date: 20211109 |