CN111917263A - Permanent magnet alternating current servo motor - Google Patents

Permanent magnet alternating current servo motor Download PDF

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Publication number
CN111917263A
CN111917263A CN202010888742.8A CN202010888742A CN111917263A CN 111917263 A CN111917263 A CN 111917263A CN 202010888742 A CN202010888742 A CN 202010888742A CN 111917263 A CN111917263 A CN 111917263A
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motor
permanent magnet
heat dissipation
speed
fan
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CN202010888742.8A
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CN111917263B (en
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许志锋
唐开胜
张志文
李娟�
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Shanghai Shanghai Shandong Driving Technology Co ltd
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Shanghai Shanghai Shandong Driving Technology Co ltd
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
    • H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
    • H02K21/14—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/14—Stator cores with salient poles
    • H02K1/146—Stator cores with salient poles consisting of a generally annular yoke with salient poles
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/27—Rotor cores with permanent magnets
    • H02K1/2706—Inner rotors
    • H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
    • H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
    • H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
    • H02K1/278—Surface mounted magnets; Inset magnets
    • 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
    • H02K11/25—Devices for sensing temperature, or actuated thereby
    • 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
    • H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
    • H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Motor Or Generator Cooling System (AREA)

Abstract

The invention discloses a permanent magnet alternating current servo motor which comprises a motor body, a front end cover and a rear end cover, wherein the front end cover is covered at the front port of the motor body and is fixed through screws, the rear end cover is covered at the rear port of the motor body and is fixed through screws, the motor body consists of a protective shell, a stator iron core, a rotor iron core and a circuit board, the stator iron core is inserted in the protective shell, the rotor iron core is inserted in the stator iron core, and the circuit board is installed at one end of the stator iron core. This permanent magnetism alternating current servo motor, overall structure adopt the modularized design for assembling between each part is convenient, swift, utilizes the radiator fan who installs on the rear end cover to discharge the heat that gathers in the organism simultaneously, thereby improves the holistic heat-sinking capability of motor, ensures motor efficient operating condition.

Description

Permanent magnet alternating current servo motor
Technical Field
The invention relates to the technical field of motors, in particular to a permanent magnet alternating current servo motor.
Background
With the rapid development of industrial automation technology, the basic technology of automation, namely servo technology, has revolutionary development, the alternating current driving technology is mature day by day, and commercial products are increasingly popularized. The motor has good controllability, flexibility and accuracy, and is widely applied to the field of industrial manufacturing.
However, after the existing motor is used for a long time, a large amount of heat can be accumulated in the motor, so that the normal working state is influenced; secondly, the whole structure of the motor is complex, the number of parts is large, the assembly process is complicated and inconvenient, and the current conversion of the motor needs to be controlled by the electric brush and the commutator, so that the problem of later-stage carbon brush maintenance exists.
Disclosure of Invention
The invention aims to provide a permanent magnet alternating current servo motor, the whole structure of which adopts a modular design, so that the assembly of all parts is convenient and quick, and meanwhile, a heat dissipation fan arranged on a rear end cover is utilized to discharge heat accumulated in a motor body, so that the heat dissipation capability of the whole motor is improved, the efficient working state of the motor is guaranteed, and the problems in the prior art can be solved.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a permanent magnetism alternating current servo motor, includes organism, front end housing and rear end cap, the front end housing lid is adorned in the front end port department of organism to through the screw fixation, the rear end cap lid is adorned in the rear end port department of organism to through the screw fixation, the organism comprises protecting sheathing, stator core, rotor core and circuit board, stator core cartridge is in protecting sheathing, rotor core cartridge is in stator core, the one end in stator core is installed to the circuit board.
Preferably, the stator core further comprises a core body a, a framework and a coil winding; the inner surface of the core body A is provided with a mounting groove which is correspondingly matched with the framework, the framework is inserted into the core body A and is embedded into the mounting groove, and the coil winding is wound on four end convex plates of the framework.
Preferably, the rotor core further comprises a core body B, a rotating shaft A, a rotating shaft B, magnetic steel A and magnetic steel B; the core body B is inserted into the framework, the rotating shaft A and the rotating shaft B are respectively installed at two ends of the core body B, the magnetic steel A is attached to the arc surface of one side of the core body B and fixed through screws, and the magnetic steel B is attached to the arc surface of the other side of the core body B and fixed through screws.
Preferably, the middle part of the front end cover is provided with a shaft hole, the shaft hole is correspondingly matched with the rotating shaft A, and one end of the rotating shaft A is inserted into the shaft hole and extends out of the front end cover; and a bearing seat is arranged in the middle of the rear end cover and correspondingly matched with the rotating shaft B, and one end of the rotating shaft B is inserted into the bearing seat.
Preferably, the rear end cover is further provided with heat dissipation holes, and heat dissipation fans are installed at the heat dissipation holes and comprise plate bases, motors and fan blades; the plate base is fixed on the rear end cover through screws, the motor is installed in the middle of the plate base, and the fan blades are installed on an output shaft of the motor.
Preferably, a motor overheating protection circuit is further arranged on the circuit board, and the motor overheating protection circuit 141 comprises a triode V1, a triode V2, a relay K, a thermistor RT1, a thermistor RT2 and a thermistor RT 3.
Preferably, thermistor RT1, thermistor RT2 and thermistor RT3 are established ties to be connected with triode V1's base, triode V2's base connecting resistance R4, and resistance R4 connects triode V1's collecting electrode, the collecting electrode of triode V2 is connected to relay K to and +12V voltage.
Compared with the prior art, the invention has the following beneficial effects:
according to the permanent magnet alternating current servo motor, the rotor core is composed of permanent magnet steel A, magnetic steel B and the like, and the coil winding arranged in the stator core is located at outside the rotor core, so that the permanent magnet alternating current servo motor is easy to dissipate heat accumulated in a motor body by using a cooling fan arranged on a rear end cover, the cooling capacity is further improved, and the efficient operation of the motor is ensured; secondly, the permanent magnet alternating current servo motor does not need a commutator, and the problem of maintenance of carbon brushes is solved, so that the permanent magnet alternating current servo motor can be widely applied to the technical field of automatic manufacturing equipment.
Drawings
Fig. 1 is an overall structural view of a motor of the present invention;
FIG. 2 is a block diagram of the present invention;
FIG. 3 is a structural view of a stator core of the present invention;
FIG. 4 is an exploded view of a stator core structure of the present invention;
FIG. 5 is an assembly view of a rotor core structure of the present invention;
FIG. 6 is a front view of the rear end cap of the present invention;
FIG. 7 is a structural view of a heat dissipation fan of the present invention;
FIG. 8 is a circuit diagram of the motor overheat protection of the present invention;
fig. 9 is a schematic view of the diameter r of the fan blade 53.
In the figure: 1. a body; 11. a protective housing; 12. a stator core; 121. a core body A; 122. a framework; 123. a coil winding; 13. a rotor core; 131. a core body B; 132. a rotating shaft A; 133. a rotating shaft B; 134. magnetic steel A; 135. magnetic steel B; 14. a circuit board; 141. a motor overheat protection circuit; 2. a front end cover; 21. a shaft hole; 3. a rear end cap; 31. a bearing seat; 32. heat dissipation holes; 4. installing a slot position; 5. a heat radiation fan; 51. a plate base; 52. a motor; 53. a fan blade.
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. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-8, a permanent magnet ac servo motor includes a body 1, a front end cover 2 and a rear end cover 3, the front end cover 2 is covered on the front end of the body 1 and fixed by screws, the rear end cover 3 is covered on the rear end of the body 1 and fixed by screws, the body 1 is composed of a protective casing 11, a stator core 12, a rotor core 13 and a circuit board 14, the stator core 12 is inserted in the protective casing 11, the rotor core 13 is inserted in the stator core 12, and the circuit board 14 is installed on one end of the stator core 12.
The stator core 12 further includes a core a121, a bobbin 122, and a coil winding 123; the inner surface of the core body a121 is provided with a mounting groove 4, and the mounting groove 4 is correspondingly matched with the framework 122, so that the framework 122 can be inserted into the core body a121 and embedded into the mounting groove 4, and the coil winding 123 is wound on the four-end convex plate of the framework 122.
The rotor core 13 further includes a core B131, a rotating shaft a132, a rotating shaft B133, a magnetic steel a134, and a magnetic steel B135; the core body B131 is inserted into the frame 122, the rotating shaft a132 and the rotating shaft B133 are respectively installed at two ends of the core body B131, the magnetic steel a134 is attached to the arc surface at one side of the core body B131 and fixed by screws, and the magnetic steel B135 is attached to the arc surface at the other side of the core body B131 and fixed by screws.
The middle part of the front end cover 2 is provided with a shaft hole 21, the shaft hole 21 is correspondingly matched with the rotating shaft A132, so that one end of the rotating shaft A132 can be inserted into the shaft hole 21 and extends out of the front end cover 2; the middle part in the rear end cover 3 is provided with a bearing seat 31, the bearing seat 31 is correspondingly matched with the rotating shaft B133, and one end of the rotating shaft B133 is inserted into the bearing seat 31.
The rear end cover 3 is further provided with heat dissipation holes 32, the heat dissipation holes 32 are provided with heat dissipation fans 5, and each heat dissipation fan 5 comprises a plate base 51, a motor 52 and fan blades 53; the plate base 51 is fixed on the rear end cover 3 through screws, the motor 52 is arranged in the middle of the plate base 51, and the fan blades 53 are arranged on an output shaft of the motor 52; the motor 52 drives the fan blades 53 to rotate at a high speed to generate eddy currents, so as to suck out heat accumulated in the machine body 1 and discharge the heat through the heat dissipation holes 32, thereby improving the efficient operation state of the motor.
The circuit board 14 is further provided with a motor overheating protection circuit 141, and the motor overheating protection circuit 141 comprises a triode V1, a triode V2, a relay K, a thermistor RT1, a thermistor RT2 and a thermistor RT 3; wherein the content of the first and second substances,
thermistor RT1, thermistor RT2 and thermistor RT3 are connected in series and are connected with the base of triode V1, the base of triode V2 is connected with resistor R4, resistor R4 is connected with the collector of triode V1, relay K is connected with the collector of triode V2, and +12V voltage.
The thermistor RT1, the thermistor RT2 and the thermistor RT3 are arranged at corresponding positions of the stator core 12 where heat is generated, when the heat of the stator core 12 is too high, the resistance values of the thermistor RT1, the thermistor RT2 and the thermistor RT3 are reduced, the base of the triode V1 is in a low level and no current passes through, the triode V1 is cut off, the collector of the triode V1 is in a high level, the base of the triode V2 is in a high level and enough current passes through and is in saturation conduction, the relay K is electrified and attracted, and the motor power supply is cut off under the control of contact action, so that the protection of the motor is realized.
According to the permanent magnet alternating current servo motor, the rotor core 13 is composed of permanent magnet steel A134, permanent magnet steel B135 and the like, the coil winding 123 arranged in the stator core 12 is located at the outer of the rotor core 13, so that the permanent magnet alternating current servo motor is easy to perform heat dissipation, and meanwhile, heat accumulated in the motor body 1 is discharged by the cooling fan 5 arranged on the rear end cover 3, so that the heat dissipation capacity is further improved, and the efficient operation of the motor is guaranteed; secondly, the permanent magnet alternating current servo motor does not need a commutator, and the problem of maintenance of carbon brushes is solved, so that the permanent magnet alternating current servo motor can be widely applied to the technical field of automatic manufacturing equipment.
In summary, the following steps: this permanent magnetism alternating current servo motor, overall structure adopt the modularized design for the assembly between each part is convenient, swift, utilizes the radiator fan 5 of installation to discharge the heat that gathers in the organism 1 on the rear end cap 3 simultaneously, thereby improves the holistic heat-sinking capability of motor, ensures motor efficient operating condition, therefore effectively solves prior art problem.
In one embodiment, the present permanent magnet ac servomotor may further include a controller for performing the following steps a 1-A3:
step A1: the formula (1) is utilized to obtain the axial speed of the air flow required by the heat dissipation of the permanent magnet alternating current servo motor,
Figure BDA0002656301580000051
wherein ω iszThe axial speed of the airflow required by the heat dissipation of the permanent magnet alternating current servo motor is represented; u represents the voltage across the said permanent magnet ac servomotor; i represents the current through said one permanent magnet ac servomotor; r represents the diameter of the fan blade (53); ρ represents the air density (preferably 1.128 kg/m)3) (ii) a C represents the specific heat capacity of air (an advisable value is 1.005kJ/kg. k); delta E represents the preset temperature difference before and after heat dissipation of the permanent magnet alternating current servo motor;
step A2: obtaining a relational expression between the torsional speed of the heat radiation fan (5) and the rotating speed of the motor (52) by using the formula (2):
Figure BDA0002656301580000061
wherein Δ V represents the torsional speed of the heat-dissipating fan (5); n represents the rotational speed of the motor (52); mu represents the total pressure efficiency of the cooling fan (5); p represents the total pressure of the cooling fan (5); wherein, the twisting speed represents the change of the air flow in the rotating speed of the fan blade (53) of the cooling fan; the total pressure of the cooling fan (5) is equal to the pressure at the outlet of the cooling fan (5) minus the pressure at the inlet of the cooling fan (5); the full-pressure efficiency of the heat radiation fan (5) is the ratio of the effective power of the heat radiation fan (5) to the shaft power of the heat radiation fan (5);
step A3: substituting the axial speed of the airflow obtained by the formula (1) and the twisting speed of the heat dissipation fan (5) obtained by the formula (2) into the formula (3) to obtain a relational expression between the average relative speed of the airflow of the heat dissipation fan (5) and the rotating speed of the motor (52),
Figure BDA0002656301580000062
wherein ω represents the average relative speed of the air flow of the cooling fan (5);
deriving n from ω in equation (3)To
Figure BDA0002656301580000063
Order to
Figure BDA0002656301580000064
The value of n is obtained, the obtained value of n is brought back to the formula (3), and the value of n which can obtain the maximum value of omega is selected and recorded as n0The rotational speed of the motor (52) is controlled to n0The average relative speed of the air flow of the heat dissipation fan (5) can be enabled to reach a larger degree, and the heat dissipation degree is also higher.
The beneficial effects of the above technical scheme are: obtaining the axial speed of the airflow required by heat dissipation of the permanent magnet alternating current servo motor by using a formula (1), in order to convert the temperature required by heat dissipation into the axial speed of the airflow required by heat dissipation through the formula, so that information can be estimated to the side of the heat dissipation fan (5) to facilitate subsequent calculation, obtaining a relational expression of the torsional speed of the heat dissipation fan (5) relative to the rotating speed of the motor (52) by using a formula (2), in order to macroscopically reflect the work amount of the heat dissipation fan (5) on the air through the torsional speed, determining the relation of the torsional speed and the rotating speed of the motor (52) through the expression to facilitate subsequent control, obtaining a relational expression of the average relative speed of the airflow of the heat dissipation fan (5) relative to the rotating speed of the motor (52) by using a formula (3), and thus obtaining the relation of the average relative speed of the airflow of the heat dissipation fan (5) relative to the rotating speed of the motor (52) according to the, the rotation speed of the motor (52) which can enable the average relative speed of the air flow of the cooling fan (5) to reach the maximum is obtained by utilizing a derivation mode, and the rotation speed of the motor (52) is further controlled, so that the cooling degree of the cooling fan (5) is higher, and the automation and the high efficiency of the whole system are reflected.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (8)

1. The utility model provides a permanent magnetism alternating current servo motor, includes organism (1), front end housing (2) and rear end cap (3), its characterized in that: front end housing (2) lid is adorned in the front end port department of organism (1) to through the screw fixation, rear end housing (3) lid is adorned in the rear end port department of organism (1) to through the screw fixation, organism (1) comprises protecting sheathing (11), stator core (12), rotor core (13) and circuit board (14), stator core (12) cartridge is in protecting sheathing (11), rotor core (13) cartridge is in stator core (12), the one end in stator core (12) is installed in circuit board (14).
2. A permanent magnet ac servomotor according to claim 1, wherein: the stator core (12) further comprises a core body A (121), a framework (122) and a coil winding (123); the inner surface of core A (121) sets up installation trench (4), and installation trench (4) correspond with skeleton (122) and match, in skeleton (122) inserted core A (121) to in embedding installation trench (4), coil winding (123) coil on the four-end flange of skeleton (122).
3. A permanent magnet ac servomotor according to claim 1, wherein: the rotor core (13) further comprises a core body B (131), a rotating shaft A (132), a rotating shaft B (133), magnetic steel A (134) and magnetic steel B (135); the core body B (131) is inserted into the framework (122), the rotating shaft A (132) and the rotating shaft B (133) are respectively installed at two ends of the core body B (131), the magnetic steel A (134) is attached to the cambered surface of one side of the core body B (131) and fixed through screws, and the magnetic steel B (135) is attached to the cambered surface of the other side of the core body B (131) and fixed through screws.
4. A permanent magnet ac servomotor according to claim 1, wherein: the middle part of the front end cover (2) is provided with a shaft hole (21), the shaft hole (21) is correspondingly matched with a rotating shaft A (132), and one end of the rotating shaft A (132) is inserted into the shaft hole (21) and extends out of the front end cover (2); and a bearing seat (31) is arranged in the middle of the rear end cover (3), the bearing seat (31) is correspondingly matched with a rotating shaft B (133), and one end of the rotating shaft B (133) is inserted into the bearing seat (31).
5. A permanent magnet ac servomotor according to claim 1, wherein: the rear end cover (3) is further provided with heat dissipation holes (32), heat dissipation fans (5) are installed at the heat dissipation holes (32), and each heat dissipation fan (5) comprises a plate seat (51), a motor (52) and fan blades (53); the plate base (51) is fixed on the rear end cover (3) through screws, the motor (52) is installed in the middle of the plate base (51), and the fan blades (53) are installed on an output shaft of the motor (52).
6. A permanent magnet ac servomotor according to claim 1, wherein: still set up motor overheat protection circuit (141) on circuit board (14), motor overheat protection circuit (141) include triode V1, triode V2, relay K, thermistor RT1, thermistor RT2 and thermistor RT 3.
7. A permanent magnet ac servomotor according to claim 6, wherein: thermistor RT1, thermistor RT2 and thermistor RT3 establish ties to be connected with triode V1's base, triode V2's base connecting resistance R4, triode V1's collecting electrode is connected to resistance R4, triode V2's collecting electrode is connected to relay K to and +12V voltage.
8. A permanent magnet ac servomotor according to claim 5, wherein:
the controller is further included for performing the following steps A1-A3:
step A1: the formula (1) is utilized to obtain the axial speed of the air flow required by the heat dissipation of the permanent magnet alternating current servo motor,
Figure FDA0002656301570000021
wherein ω iszThe axial speed of the airflow required by the heat dissipation of the permanent magnet alternating current servo motor is represented; u represents the voltage across the said permanent magnet ac servomotor; i represents the current through said one permanent magnet ac servomotor; r represents the diameter of the fan blade (53); ρ represents an air density; c represents the specific heat capacity of air; delta E represents the preset temperature difference before and after heat dissipation of the permanent magnet alternating current servo motor;
step A2: obtaining a relational expression between the torsional speed of the heat radiation fan (5) and the rotating speed of the motor (52) by using the formula (2):
Figure FDA0002656301570000031
wherein Δ V represents the torsional speed of the heat-dissipating fan (5); n represents the rotational speed of the motor (52); mu represents the total pressure efficiency of the cooling fan (5); p represents the total pressure of the cooling fan (5);
step A3: substituting the axial speed of the airflow obtained by the formula (1) and the twisting speed of the heat dissipation fan (5) obtained by the formula (2) into the formula (3) to obtain a relational expression between the average relative speed of the airflow of the heat dissipation fan (5) and the rotating speed of the motor (52):
Figure FDA0002656301570000032
wherein ω represents the average relative speed of the air flow of the cooling fan (5);
will be shown in formula (3)Is derived from n
Figure FDA0002656301570000033
Order to
Figure FDA0002656301570000034
The value of n is obtained, the obtained value of n is brought back to the formula (3), and the value of n which can obtain the maximum value of omega is selected and recorded as n0The rotational speed of the motor (52) is controlled to n0The value is obtained.
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6037692A (en) * 1997-12-16 2000-03-14 Miekka; Fred N. High power low RPM D.C. motor
CN203027047U (en) * 2013-01-05 2013-06-26 江苏上骐集团有限公司 Permanent magnet motor
CN103812249A (en) * 2014-02-21 2014-05-21 南通大青节能科技有限公司 Variable frequency motor
CN207868971U (en) * 2018-02-09 2018-09-14 重庆新登奇机电技术有限公司 A kind of permanent magnet synchronous servo motor stator structure and permanent magnet synchronous servo motor
JP2019129570A (en) * 2018-01-23 2019-08-01 株式会社荏原製作所 Electric motor assembly and control unit
CN209375385U (en) * 2019-01-11 2019-09-10 日电产伺服电机（常州）有限公司 A kind of brush DC compressor electric motor
CN111082602A (en) * 2020-01-21 2020-04-28 浙江绿源电动车有限公司 Hub motor with built-in control system

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6037692A (en) * 1997-12-16 2000-03-14 Miekka; Fred N. High power low RPM D.C. motor
CN203027047U (en) * 2013-01-05 2013-06-26 江苏上骐集团有限公司 Permanent magnet motor
CN103812249A (en) * 2014-02-21 2014-05-21 南通大青节能科技有限公司 Variable frequency motor
JP2019129570A (en) * 2018-01-23 2019-08-01 株式会社荏原製作所 Electric motor assembly and control unit
CN207868971U (en) * 2018-02-09 2018-09-14 重庆新登奇机电技术有限公司 A kind of permanent magnet synchronous servo motor stator structure and permanent magnet synchronous servo motor
CN209375385U (en) * 2019-01-11 2019-09-10 日电产伺服电机（常州）有限公司 A kind of brush DC compressor electric motor
CN111082602A (en) * 2020-01-21 2020-04-28 浙江绿源电动车有限公司 Hub motor with built-in control system

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