CN112134417A - Novel variable frequency motor - Google Patents
Novel variable frequency motor Download PDFInfo
- Publication number
- CN112134417A CN112134417A CN202011143225.4A CN202011143225A CN112134417A CN 112134417 A CN112134417 A CN 112134417A CN 202011143225 A CN202011143225 A CN 202011143225A CN 112134417 A CN112134417 A CN 112134417A
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- CN
- China
- Prior art keywords
- circuit
- motor
- rear end
- circuit board
- variable frequency
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
- H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
- H02K11/21—Devices for sensing speed or position, or actuated thereby
- H02K11/215—Magnetic effect devices, e.g. Hall-effect or magneto-resistive elements
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
- H02H7/085—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against excessive load
- H02H7/0852—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against excessive load directly responsive to abnormal temperature by using a temperature sensor
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- 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
- H02K1/32—Rotating parts of the magnetic circuit with channels or ducts for flow of cooling medium
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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
- H02K11/20—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
Abstract
The invention discloses a novel variable frequency motor, relates to an electric tool, and aims to solve the problem that people cannot detect the use condition of the motor, only maintain the motor when the motor is damaged and influence the service life of the motor, wherein the technical scheme is as follows: including casing and rotation connection at the rotor of casing, the both ends of casing can be dismantled and be connected with and rotate front end housing and the rear end cap of being connected with the rotor, can dismantle in the rear end cap and be connected with the circuit board, are equipped with detection module on the circuit board, and detection module includes temperature-detecting circuit. The motor is detected through the stall detection circuit, the temperature detection circuit is powered when the motor is driven, energy is saved, the environment is protected, the temperature detection circuit detects the temperature of the shell in real time, and when the hidden danger that the motor is burnt out due to high temperature exists, the motor is powered off through the second switch motor, and people are prompted to overhaul and maintain.
Description
Technical Field
The invention relates to an electric tool, in particular to a novel variable frequency motor.
Background
An Electric motor (also known as "motor") is an electromagnetic device that converts or transmits Electric energy according to the law of electromagnetic induction, and is represented by a letter M (old standard is D) in a circuit, and its main function is to generate driving torque, and as a power source for electrical appliances or various machines, it converts Electric energy into mechanical energy, and is commonly used for household appliances (including washing machines, Electric fans, refrigerators, air conditioners, recorders, video disc players, dust collectors, cameras, hair dryers, Electric shavers, etc.) according to its use.
Wherein, motor housing sets to the fin form as radiating main mode, and processing difficulty, the radiating effect is not obvious, and when certain temperature that the shell reached, the condition that the heat can not come out of appearing scattering, and most motors do not have sensing and measuring effect, when making the unstable situation of operation appear in the motor, people can't detect the in service behavior of motor, only maintains when the motor damages, influences the life of motor.
Therefore, a new solution is needed to solve this problem.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a novel variable frequency motor, wherein the rotation of the motor is detected through a stall detection circuit, the temperature detection circuit is powered when the motor is driven, the energy is saved, the environment is protected, the temperature of the shell is detected in real time through the temperature detection circuit, and when the hidden danger of burning the motor due to high temperature exists, the motor is powered off through a second switch motor, so that people are prompted to overhaul and maintain the motor.
The technical purpose of the invention is realized by the following technical scheme: the utility model provides a novel variable frequency motor, includes the casing and rotates the rotor of connection in the casing, the front end housing and the rear end cap that are connected with and rotate with the rotor and are connected can be dismantled at the both ends of casing, can dismantle in the rear end cap and be connected with the circuit board, be equipped with detection module on the circuit board, detection module includes
The temperature detection circuit is arranged on the circuit board and used for sensing the temperature in the shell to output a temperature sensing signal;
the stalling detection circuit is arranged on the circuit board and used for outputting a starting signal when the rotor rotates;
the first switch circuit is coupled with the stalling detection circuit and the temperature detection circuit and responds to a starting signal to supply power to the temperature detection circuit;
and the judging circuit is coupled with the temperature detection circuit and responds to the condition that the temperature sensing signal is greater than the reference signal, and the power supply of the motor is cut off through the second switching circuit.
Through adopting above-mentioned technical scheme, can dismantle with the casing through front end housing and rear end cap and be connected, and the rotor rotates through pivot and front end housing and rear end cap to be connected, the installation of the rotor of being convenient for is dismantled, and set up the circuit board in the rear end cap, stall detection circuitry through setting up on the circuit board detects the rotation of countershaft, supply power to temperature detection circuitry when the motor rotates, detect the temperature in the casing through temperature detection circuitry, and then detect heat dissipation and the accumulational condition of heat in the motor working process, judge circuit and second switch circuit when temperature-sensing signal is too high, carry out outage operation to the motor, can effectively guarantee the life of motor.
The invention is further configured to: a plurality of caulking grooves used for containing the magnetic tiles are distributed on the inner peripheral wall of the shell in an annular array mode, and the caulking grooves are communicated with the outside in the direction towards the rear end cover.
Through adopting above-mentioned technical scheme, through seting up of caulking groove, the installation of the magnetic shoe of being convenient for, and caulking groove and casing towards one side intercommunication of rear end cap, the people of being convenient for assemble the magnetic shoe.
The invention is further configured to: the rotor includes pivot and fixed connection and changes epaxial rotor core, annular array distributes and has the concave part that is used for holding coil winding on the rotor core, set up the radiating groove that a plurality of arrays distribute on rotor core's the periphery wall.
Through adopting above-mentioned technical scheme, through the concave part that sets up on the rotor core, can accomodate coil winding to through seting up of radiating groove, the surface of increase rotor core plays better radiating effect when rotor core rotates.
The invention is further configured to: the one end of pivot towards the rear end cap runs through the circuit board and is connected with the rear end cap rotation, can dismantle in the pivot and be connected with the magnetic part that is located the rear end cap, be equipped with on the circuit board and be located the outlying hall element of magnetic part.
Through adopting above-mentioned technical scheme, through fixed connection in the epaxial magnetic part of pivot, when the pivot rotates, detect the change in magnetic field through hall element, and then detect the rotational speed of pivot, improve the detection precision that the motor changes and stops.
The invention is further configured to: the stall detection circuit comprises a first amplifying circuit connected with the Hall element and a comparison circuit coupled with the first amplifying circuit, wherein the comparison circuit responds to the fact that the starting signal is larger than the preset signal to output a conducting signal for conducting the first switch circuit.
Through adopting above-mentioned technical scheme, the voltage signal that produces is enlargied to hall element induction magnetic field variation through first amplifier circuit, and compares through comparison circuit, avoids receiving the rotation pivot and leads to hall element mistake to produce the condition that actuating signal and trigger temperature detection circuit, and is more energy-concerving and environment-protective.
The invention is further configured to: the first amplifying circuit comprises a triode, a pull-up resistor and a bias resistor, the base electrode of the triode is coupled with the output end of the Hall element through a first capacitor, the collector electrode of the triode is connected with the pull-up resistor and then connected to a power supply VCC, and the emitting electrode of the triode is grounded.
By adopting the technical scheme, the voltage signal generated by the Hall element is amplified by the first amplifying circuit formed by the triode, the cost is low, and stable amplifying operation is carried out on the signal acquired by the Hall element.
The invention is further configured to: the judging circuit and the comparing circuit are both voltage comparators.
Through adopting above-mentioned technical scheme, regard as judgement circuit and comparison circuit through the voltage comparator, can compare the temperature sensing signal of gathering and start signal with the mode of reference signal with voltage, it is more accurate, improve the work efficiency of signal contrast.
The invention is further configured to: and a first light emitting diode and a second light emitting diode are connected between the output ends of the judging circuit and the comparing circuit and between the output ends of the first switching circuit and the second switching circuit respectively.
By adopting the technical scheme, when the judging circuit and the comparing circuit output signals for conducting the first switch circuit or the second switch circuit, the first light emitting diode or the second light emitting diode can be lightened through the first light emitting triode and the second light emitting triode, and the working state of the motor is prompted.
The invention is further configured to: the rear end cap includes can dismantle the connecting portion of being connected and can dismantle the sealed lid of being connected with connecting portion through the bolt with the casing, the circuit board passes through screw and connecting portion fixed connection, a pot head that the pivot runs through the inner chamber that the circuit board is located sealed lid is equipped with the fixed cover that is used for holding the magnetism piece of inhaling.
Through adopting above-mentioned technical scheme, the rear end cap can be dismantled by connecting portion and sealed lid and be connected, and the people of being convenient for fix the magnetic part through fixed cover after the installation rotor, the people's of being convenient for operation.
In conclusion, the invention has the following beneficial effects:
can dismantle with the casing through front end housing and rear end cap and be connected, and the rotor rotates through pivot and front end housing and rear end cap to be connected, the installation of the rotor of being convenient for is dismantled, and set up the circuit board in the rear end cap, stall detection circuitry through setting up on the circuit board detects the rotation of pivot, supply power to temperature detection circuitry when the motor rotates, detect the temperature in the casing through temperature detection circuitry, and then detect heat dissipation and the accumulational condition of heat in the motor working process, judge circuit and second switch circuit when temperature-sensing signal is too high, carry out the outage operation to the motor, can effectively guarantee the life of motor.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a cross-sectional view of the present invention;
FIG. 3 is an enlarged view of portion A of FIG. 2;
FIG. 4 is an enlarged view of portion B of FIG. 2;
FIG. 5 is a block diagram of the detection module of the present invention;
FIG. 6 is a schematic circuit diagram of a stop-and-go detection circuit according to the present invention;
FIG. 7 is a schematic circuit diagram of the temperature detection circuit of the present invention.
In the figure: 1. a housing; 2. a front end cover; 3. a rear end cap; 4. a circuit board; 5. a temperature detection circuit; 6. a stall detection circuit; 7. a first switching circuit; 8. a judgment circuit; 9. caulking grooves; 10. a rotating shaft; 11. a rotor core; 12. a heat sink; 13. a Hall element; 14. a first amplifying circuit; 15. a comparison circuit; 16. a second switching circuit; 17. a connecting portion; 18. a sealing cover; 19. and (4) fixing sleeves.
Detailed Description
The invention is described in detail below with reference to the figures and examples.
A novel variable frequency motor is shown in figures 1 and 5, and comprises a shell 1 and a rotor rotatably connected in the shell 1, wherein a front end cover 2 and a rear end cover 3 which are rotatably connected with the rotor are detachably connected at two ends of the shell 1, a circuit board 4 is detachably connected in the rear end cover 3, a detection module is arranged on the circuit board 4, specifically, the rear end cover 3 comprises a connecting part 17 detachably connected with the shell 1 through a bolt and a sealing cover 18 detachably connected with the connecting part 17, the circuit board 4 is fixedly connected with the connecting part 17 through a screw,
as shown in fig. 5, the detection module includes a temperature detection circuit 5, a stall detection circuit 6, a first switch circuit 7 and a judgment circuit 8, wherein the temperature detection circuit 5 is disposed on the circuit board 4 for sensing the temperature inside the casing 1 to output a temperature sensing signal, the stall detection circuit 6 is disposed on the circuit board 4 for detecting the rotation of the rotor to output a start signal, the first switch circuit 7 is coupled to the stall detection circuit 6 and the temperature detection circuit 5 and supplies power to the temperature detection circuit 5 in response to the start signal, and the judgment circuit 8 is coupled to the temperature detection circuit 5 and disconnects the power supply of the motor through the second switch circuit 16 in response to the temperature sensing signal being greater than the reference signal.
As shown in fig. 3, the temperature detection circuit 5 includes a temperature sensitive resistor RT with a positive temperature coefficient, a resistor R7, the temperature sensitive resistor RT and the resistor R7 are connected in series and connected between the power VCC and the ground, and the connection end of the temperature sensitive resistor RT and the resistor R7 is connected to the operational amplifier of the chip LM 2904.
As shown in fig. 2 and 3, a plurality of caulking grooves 9 for accommodating the magnetic tiles are distributed on the inner circumferential wall of the shell 1 in an annular array, the caulking grooves 9 are communicated with the outside in the direction of the rear end cover 3, wherein the rotor comprises a rotating shaft 10 and a rotor core 11 fixedly connected to the rotating shaft 10, concave parts for accommodating coil windings are distributed on the rotor core 11 in an annular array manner, a plurality of radiating grooves 12 distributed in an array manner are arranged on the peripheral wall of the rotor core 11, as shown in fig. 3, one end of the rotating shaft 10 facing the rear end cover 3 penetrates through the circuit board 4 and is rotatably connected with the rear end cover 3, one end of the rotating shaft 10 penetrating through the circuit board 4 and located in the inner cavity of the sealing cover 18 is sleeved with a fixing sleeve 19 for accommodating a magnetic element, the fixed sleeve 19 is made of high-temperature resistant plastic, the outer peripheral wall of the fixed sleeve 19 is connected with an arc-shaped magnetic part in a clamping manner, and a hall element 13 positioned at the periphery of the magnetic part is welded on one side of the circuit board 4, which faces away from the rotor core 11.
As shown in fig. 6, the stall detection circuit 6 includes a first amplifying circuit 14 connected to the hall element 13 and a comparing circuit 15 coupled to the first amplifying circuit 14, where the comparing circuit 15 responds to a start signal greater than a preset signal to output a conducting signal for conducting the first switch circuit 7, where the first amplifying circuit 14 includes a transistor, a pull-up resistor and a bias resistor, a base of the transistor is coupled to an output terminal of the hall element 13 through a first capacitor, a collector of the transistor is connected to the pull-up resistor and then to a power source VCC, and an emitter of the transistor is grounded.
As shown in fig. 6 and 7, the determining circuit 8 and the comparing circuit 15 are both based on a dual operational amplifier of the chip LM358 as a voltage comparator, specifically, the pin 3 of the chip LM358 is connected to the adjustable potentiometer RP1 and then grounded, the pin 3 of the chip LM358 is connected to the resistor R5 to the power VCC, the pin 2 of the chip LM358 is connected to the resistor R4 and the capacitor C2 to the collector of the triode, the pin 5 of the chip LM358 is connected to the adjustable potentiometer RP2 and then grounded, the pin 5 of the chip LM358 is connected to the resistor R9 to the power VCC, the pin 6 of the chip LM358 is connected to the resistor R4 and the capacitor C2 to the output end 1 pin of the chip LM2904, and the output ends of the determining circuit 8 and the comparing circuit 15 are connected to the first light emitting diode LED1 and the second light emitting diode LED2 respectively with the first switch circuit 7 and the second switch circuit 16.
As shown in fig. 6 and 7, the first switch circuit 7 and the second switch circuit 16 are triode switch circuits based on PNP type triodes, and the collector of the triode in the first switch circuit 7 is coupled with the normally open relay KM1, and the control switch K1-1 of the relay KM1 is connected in series with the temperature detection circuit 5, while the normally closed relay KM2 is coupled in the second switch circuit 16, and the control switch of the relay KM2 is connected in series with the power supply terminal of the motor, so that when the relay KM2 is powered on, the power supply of the motor is cut off.
When the motor is assembled, the rotor penetrates through the front end cover 2 to be rotatably connected with the front end cover 2, then the other end of the rotor sequentially penetrates through the shell 1, the connecting part 17, the circuit board 4 and the sealing cover 18 to be rotatably connected through the bearing, and due to the fact that the front end cover 2, the shell 1 and the connecting part 17 are fixedly connected in a bolt connection mode, people can conveniently detach the front end cover 2 or the rear end cover 3 to inspect and maintain the motor, and people can conveniently maintain the motor.
When the motor is powered to rotate, because the rotating shaft 10 is fixedly connected with the magnetic part through the fixed sleeve 19, and when the motor rotates, the magnetic field generated by the magnetic part changes periodically along with the rotation of the rotating shaft 10, so that the hall element 13 in the magnetic field generates a change signal of current along with the change of the magnetic field, when a voltage signal is amplified through the first amplifying circuit 14, the current signal is amplified in multiple through the triode amplifying circuit serving as the first amplifying circuit 14, so as to improve the accurate detection of the rotation work of the motor, the output end of the triode amplifying circuit is connected with the comparing circuit 15 based on the chip LM358, only when the motor rotates to a certain speed to generate a larger current, and after the amplifying operation, the larger current is converted into a voltage signal through the resistor R4 to be compared with a preset signal of the comparing circuit 15, so as to avoid the interference of the manual rotation of the rotating shaft 10 to the detection, when the motor is powered to rotate, the first switch circuit 7 is switched on, so that the relay KM1 is electrified, further, the normally open control switch K1-1 is closed, the temperature detection circuit 5 supplies power, the resistance value changes along with the change of the temperature in the shell 1 through the temperature sensitive resistor, thereby outputting a temperature-sensitive signal as a voltage signal, amplifying the temperature-sensitive signal by an operational amplifier based on the chip LM2904 and comparing the temperature-sensitive signal with the voltage signal by the judgment circuit 8, when the temperature rises more than the reference signal, the judgment circuit 8 outputs a low level signal to turn on the second light emitting diode LED2, and the relay KM2 is electrified, so that the control switch of the normally closed relay KM2 is disconnected, and then make the motor outage, in time maintain the motor and overhaul, reduce forked tail motor trouble and the economic loss that leads to.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (9)
1. The utility model provides a novel inverter motor which characterized in that: including casing (1) and the rotor of rotation connection in casing (1), the both ends of casing (1) can be dismantled and be connected with front end housing (2) and rear end cap (3) of being connected with the rotor rotation, can dismantle in rear end cap (3) and be connected with circuit board (4), be equipped with detection module on circuit board (4), detection module includes that
The temperature detection circuit (5) is arranged on the circuit board (4) and used for sensing the temperature in the shell (1) to output a temperature sensing signal;
the stalling detection circuit (6) is arranged on the circuit board (4) and is used for outputting a starting signal when the rotor rotates;
a first switching circuit (7) coupled to the stall detection circuit (6) and the temperature detection circuit (5) and supplying power to the temperature detection circuit (5) in response to a start signal;
and the judging circuit (8) is coupled with the temperature detection circuit (5) and responds to the temperature sensing signal which is larger than the reference signal, and the power supply of the motor is cut off through the second switching circuit (16).
2. The novel variable frequency motor according to claim 1, characterized in that: a plurality of caulking grooves (9) used for containing magnetic tiles are distributed on the inner peripheral wall of the shell (1) in an annular array mode, and the caulking grooves (9) are communicated with the outside in the direction towards the rear end cover (3).
3. The novel variable frequency motor according to claim 1, characterized in that: the rotor includes pivot (10) and rotor core (11) of fixed connection on pivot (10), annular array distributes on rotor core (11) has the concave part that is used for holding coil winding, radiating groove (12) that a plurality of arrays distribute have been seted up on the periphery wall of rotor core (11).
4. The novel variable frequency motor according to claim 3, wherein: the one end of pivot (10) orientation rear end cap (3) runs through circuit board (4) and is connected with rear end cap (3) rotation, can dismantle in pivot (10) and be connected with the magnetic part that is located rear end cap (3), be equipped with on circuit board (4) and be located magnetic part outlying hall element (13).
5. The novel variable frequency motor according to claim 4, wherein: the stall detection circuit (6) comprises a first amplifying circuit (14) connected with the Hall element (13) and a comparison circuit (15) coupled with the first amplifying circuit (14), wherein the comparison circuit (15) responds to the fact that the starting signal is larger than the preset signal to output a conducting signal for conducting the first switch circuit (7).
6. The novel variable frequency motor according to claim 5, wherein: the first amplifying circuit (14) comprises a triode, a pull-up resistor and a bias resistor, the base electrode of the triode is coupled with the output end of the Hall element (13) through a first capacitor, the collector electrode of the triode is connected with the pull-up resistor and then connected to a power supply VCC, and the emitting electrode of the triode is grounded.
7. The novel variable frequency motor according to claim 5, wherein: the judgment circuit (8) and the comparison circuit (15) are both voltage comparators.
8. The novel variable frequency motor according to claim 7, wherein: and a first light-emitting diode and a second light-emitting diode are connected between the output ends of the judging circuit (8) and the comparing circuit (15) and the first switch circuit (7) and the second switch circuit (16) respectively.
9. The novel variable frequency motor according to claim 1, characterized in that: rear end cap (3) include with casing (1) can dismantle connecting portion (17) of being connected and can dismantle sealed lid (18) of being connected with connecting portion (17) through the bolt, circuit board (4) are through screw and connecting portion (17) fixed connection, pivot (10) run through a pot head that circuit board (4) are located the inner chamber of sealed lid (18) and are equipped with fixed cover (19) that are used for holding the magnetism piece of inhaling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011143225.4A CN112134417A (en) | 2020-10-23 | 2020-10-23 | Novel variable frequency motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011143225.4A CN112134417A (en) | 2020-10-23 | 2020-10-23 | Novel variable frequency motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112134417A true CN112134417A (en) | 2020-12-25 |
Family
ID=73853468
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011143225.4A Pending CN112134417A (en) | 2020-10-23 | 2020-10-23 | Novel variable frequency motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112134417A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102647068A (en) * | 2011-02-18 | 2012-08-22 | 德昌电机(深圳)有限公司 | Permanent-magnetic direct-current motor |
| CN205986116U (en) * | 2016-08-24 | 2017-02-22 | 宁夏创耀信科技有限公司 | Pre - protection motor |
| CN208489770U (en) * | 2018-05-30 | 2019-02-12 | 中山迈芯电子科技有限公司 | A kind of low-pressure pump DC brushless motor sine wave control device |
| EP3518394A1 (en) * | 2018-01-25 | 2019-07-31 | GE Aviation Systems LLC | Generator rotor with coil end-turn retention mechanism |
-
2020
- 2020-10-23 CN CN202011143225.4A patent/CN112134417A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102647068A (en) * | 2011-02-18 | 2012-08-22 | 德昌电机(深圳)有限公司 | Permanent-magnetic direct-current motor |
| CN205986116U (en) * | 2016-08-24 | 2017-02-22 | 宁夏创耀信科技有限公司 | Pre - protection motor |
| EP3518394A1 (en) * | 2018-01-25 | 2019-07-31 | GE Aviation Systems LLC | Generator rotor with coil end-turn retention mechanism |
| CN208489770U (en) * | 2018-05-30 | 2019-02-12 | 中山迈芯电子科技有限公司 | A kind of low-pressure pump DC brushless motor sine wave control device |
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Application publication date: 20201225 |