CN211239622U - Permanent magnet brushless motor capable of recovering back electromotive force - Google Patents
Permanent magnet brushless motor capable of recovering back electromotive force Download PDFInfo
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- CN211239622U CN211239622U CN201921523728.7U CN201921523728U CN211239622U CN 211239622 U CN211239622 U CN 211239622U CN 201921523728 U CN201921523728 U CN 201921523728U CN 211239622 U CN211239622 U CN 211239622U
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- permanent magnet
- winding coil
- stator winding
- electromotive force
- hall sensor
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Abstract
The utility model discloses a retrieve back electromotive force's permanent magnet brushless motor, concretely relates to back electromotive force recovery unit field. The permanent magnet brushless motor capable of recycling the back electromotive force comprises a motor main body and a driving circuit, wherein the motor main body comprises a stator core, a rotor core, a first stator winding coil, a second stator winding coil, a third stator winding coil, a first permanent magnet, a second permanent magnet, a third permanent magnet, a fourth permanent magnet, a rotor shaft rod and a Hall sensor, south poles of the first permanent magnet and the second permanent magnet are arranged outwards, north poles of the third permanent magnet and the fourth permanent magnet are arranged outwards, the Hall sensor is positioned between the stator core and the rotor core and uniformly distributed along the periphery of the rotor core, and the motor can lead out the back electromotive force generated after the motor driving winding coil (stator) is powered on and powered off in time and is used for charging an independent rechargeable battery or a rechargeable battery pack or a capacitor, so that the utilization of energy is improved.
Description
Technical Field
The utility model relates to a back electromotive force recovery unit field, concretely relates to retrieve back electromotive force's permanent magnet brushless motor.
Background
In the technical field of the existing motor, the back electromotive force generated after the motor driving winding coil (stator coil) is powered on and powered off is processed, and a method that a freewheeling diode opposite to the driving power supply voltage direction is connected in parallel at two ends of the winding coil (stator coil) is adopted, so that the effects of saving energy and protecting electronic elements of a motor driving circuit from being burnt by instant high-voltage breakdown of the back electromotive force are achieved. This method has been used to date and has not been developed any further for many years.
Disclosure of Invention
The utility model aims at the aforesaid not enough, provide one kind can in time derive the back electromotive force that produces after the motor drive winding coil break-make, be used for charging for solitary ability rechargeable battery, with the permanent magnet brushless motor of energy storage's recovery back electromotive force.
The utility model discloses specifically adopt following technical scheme:
the utility model provides a retrieve back electromotive force's permanent magnet brushless motor, includes motor main body and drive circuit, motor main body includes stator core, rotor core, first stator winding coil, second stator winding coil, third stator winding coil, first permanent magnet, second permanent magnet, third permanent magnet, fourth permanent magnet, rotor shaft pole and hall sensor, and south pole of first permanent magnet and second permanent magnet sets up outwards, and the north pole of third permanent magnet and fourth permanent magnet sets up outwards, hall sensor is located between stator core and the rotor core and along rotor core's periphery evenly distributed.
Preferably, in the driving circuit, the upper ends of the first stator winding coil, the second stator winding coil and the third stator winding coil are all connected with the positive electrode of a power supply, the lower ends of the first stator winding coil, the second stator winding coil and the third stator winding coil are respectively connected with the collector of a triode, and the emitter of each triode is connected with the negative electrode of the power supply;
the upper ends of the first stator winding coil, the second stator winding coil and the third stator winding coil are respectively connected with a diode, the upper ends of the first stator winding coil, the second stator winding coil and the third stator winding coil are connected with the negative pole of the diode, the lower ends of the first stator winding coil, the second stator winding coil and the third stator winding coil are respectively connected with a diode, the diodes connected with the upper ends of the first stator winding coil, the second stator winding coil and the third stator winding coil are connected in series and then connected with the positive pole of the rechargeable battery, and the diodes connected with the lower ends of the first stator winding coil, the second stator winding coil and the third stator winding coil are connected in series and then connected with the negative pole of.
Preferably, the base of each triode is connected with a signal sensor for detecting the position of the rotor core so as to determine when the collector and the emitter of the triode are switched on and off.
Preferably, the first permanent magnet, the second permanent magnet, the third permanent magnet and the fourth permanent magnet are arranged in the rotor core at the positions of surface-embedded permanent magnet rotors.
Preferably, the hall sensor is a unipolar normally closed type, when a north pole of the permanent magnet magnetic pole is close to the front surface of the hall sensor, the hall sensor outputs a high potential, and when a south pole of the permanent magnet magnetic pole is close to the front surface of the hall sensor or no magnetic field exists, the hall sensor outputs a low potential.
Preferably, the number of the hall sensors is three, and the three hall sensors are respectively a first-phase hall sensor, a second-phase hall sensor and a third-phase hall sensor.
Preferably, the first phase hall sensor is configured to detect positions of the first permanent magnet, the second permanent magnet, the third permanent magnet, and the fourth permanent magnet, so as to control on and off times of the first phase winding coil.
Preferably, the second phase hall sensor is configured to detect positions of the first permanent magnet, the second permanent magnet, the third permanent magnet, and the fourth permanent magnet to control on and off times of the second phase winding coil.
Preferably, the third phase hall sensor is configured to detect positions of the first permanent magnet, the second permanent magnet, the third permanent magnet, and the fourth permanent magnet, so as to control on and off times of the third phase winding coil.
The utility model discloses following beneficial effect has:
the back electromotive force generated after the motor driving winding coil (stator) is powered on and powered off can be timely led out to be used for charging an independent rechargeable battery or a rechargeable battery pack or a capacitor. When the motor rotates, a plurality of driving winding coils (stators) are arranged in the motor, and the motor is powered on and powered off ceaselessly, so that a continuous back electromotive force pulse train is generated, the rechargeable battery is charged by the continuous back electromotive force pulse train, the charging effect of the rechargeable battery is good, the heat generation is small, the heat generation is slow, the energy-saving effect is more visually embodied on the rechargeable battery, and the electric energy stored by the charged rechargeable battery can be used for other purposes.
Because the counter electromotive force is derived in time, the power supply of the power supply is more stable and smooth, and the motor and the driving circuit generate little heat and slowly generate heat after long-time operation. Due to the fact that other paths are provided for the back electromotive force, the electronic components can be protected from being broken down and burnt by the back electromotive force. The motor of the invention adopts unipolar driving of the winding coil (stator), namely, the winding coil (stator) only passes through unidirectional current and does not adopt bidirectional current driving. The motor has higher rotating speed than that of the motor with bidirectional current passing through the winding coil (stator), and has small heat emission and good energy-saving effect.
The motor is supplied by direct current, has simple speed regulation and multiple speed regulation modes, can control the current and voltage to regulate the speed, can adopt PWM (pulse-width modulation) speed regulation and the like, can be applied to the motor as long as the mode of direct current speed regulation is adopted, and is very convenient.
The motor can be made into a cylindrical structure, a disc structure, an inner rotor type and an outer rotor type according to actual needs, and has good applicability.
Drawings
FIG. 1 is a schematic structural diagram of a permanent magnet brushless motor for recovering back electromotive force;
fig. 2 is a circuit diagram of a permanent magnet brushless motor recovering back electromotive force;
FIG. 3 is a schematic structural diagram of a motor rotor with a rotation angle of 0 degrees;
FIG. 4 is a schematic structural diagram of a motor rotor with a rotation angle of 30 degrees;
FIG. 5 is a schematic structural diagram of a motor rotor rotating at an angle of 60 degrees;
FIG. 6 is a schematic structural view of a rotor of the motor at a rotation angle of 90 degrees;
FIG. 7 is a schematic structural diagram of a motor rotor rotating at 120 degrees;
FIG. 8 is a schematic structural diagram of a motor rotor rotating at 150 degrees;
fig. 9 is a schematic structural view of the motor rotor when the rotation angle is 180 degrees.
Wherein, 1 is first stator winding coil, 2 is second stator winding coil, 3 is third stator winding coil, 4 is stator core, 5 is rotor core, 6 is first permanent magnet, 7 is the second permanent magnet, 8 is the third permanent magnet, 9 is the fourth permanent magnet, 10 is the rotor shaft pole, 11 is hall sensor.
Detailed Description
The following description of the embodiments of the present invention will be made with reference to the accompanying drawings:
as shown in fig. 1 and 2, a permanent magnet brushless motor for recovering back electromotive force comprises a motor main body and a driving circuit, wherein the motor main body comprises a stator core 4, a rotor core 5, a first stator winding coil 1, a second stator winding coil 2, a third stator winding coil 3, a first permanent magnet 6, a second permanent magnet 7, a third permanent magnet 8, a fourth permanent magnet 9, a rotor shaft 10 and hall sensors 11, south poles of the first permanent magnet 6 and the second permanent magnet 7 are arranged outwards, north poles of the third permanent magnet 3 and the fourth permanent magnet 4 are arranged outwards, and the hall sensors 11 are positioned between the stator core and the rotor core and are uniformly distributed along the periphery of the rotor core.
In the driving circuit, the upper ends of a first stator winding coil 1, a second stator winding coil 2 and a third stator winding coil 3 are all connected with the positive electrode of a power supply, the lower ends of the first stator winding coil, the second stator winding coil and the third stator winding coil are respectively connected with the collector electrode of a triode, and the emitting electrode of each triode is connected with the negative electrode of the power supply;
the upper ends of the first stator winding coil 1, the second stator winding coil 2 and the third stator winding coil 3 are respectively connected with a diode, the upper ends of the first stator winding coil, the second stator winding coil and the third stator winding coil are connected with the cathode of the diode, the lower ends of the first stator winding coil, the second stator winding coil and the third stator winding coil are respectively connected with a diode, the diodes connected with the upper ends of the first stator winding coil, the second stator winding coil and the third stator winding coil are connected in series and then connected with the anode of the rechargeable battery, and the diodes connected with the lower ends of the first stator winding coil, the second stator winding coil and the third stator winding coil are connected in series and then connected with the cathode of the rechargeable battery.
And the base electrode of each triode is connected with a signal sensor and is used for detecting the position of the rotor core so as to determine when the collector electrode and the emitter electrode of each triode are switched on and off.
The first permanent magnet 6, the second permanent magnet 7, the third permanent magnet 8 and the fourth permanent magnet 9 are arranged in the rotor core in a surface-embedded permanent magnet rotor mode.
The Hall sensor is a monopole normally closed type, when a north pole of a permanent magnet magnetic pole is close to the front surface of the Hall sensor, the Hall sensor outputs a high potential (is opened), and when a south pole of the permanent magnet magnetic pole is close to the front surface of the Hall sensor or no magnetic field exists, the Hall sensor outputs a low potential (is closed). The Hall sensors are three, namely a first-phase Hall sensor, a second-phase Hall sensor and a third-phase Hall sensor. And the first phase Hall sensor is used for detecting the positions of the first permanent magnet, the second permanent magnet, the third permanent magnet and the fourth permanent magnet so as to control the on-off time of the first phase winding coil. The second phase Hall sensor is used for detecting the positions of the first permanent magnet, the second permanent magnet, the third permanent magnet and the fourth permanent magnet so as to control the on-off time of the second phase winding coil. And the third-phase Hall sensor is used for detecting the positions of the first permanent magnet, the second permanent magnet, the third permanent magnet and the fourth permanent magnet so as to control the on-off time of the third-phase winding coil.
Fig. 3 shows that when the rotation angle of the rotor of the motor is 0 degree, the first-phase hall sensor detects the north pole N of the permanent magnet magnetic pole on the rotor, and immediately changes the low potential signal into the output high potential signal to be transmitted to the base of the triode connected with the first stator winding coil, so that the triode is conducted, and the power current flows to the negative pole of the power supply through the first-phase winding coil and the collector and emitter of the triode. Because the first phase winding coil has the supply current to flow through, so produce the magnetic pole, north pole N orientation rotor, the north pole N that first phase winding coil produced and rotor permanent magnet magnetic pole interact, and homopolar repulsion heteropolar attracting makes the rotor begin the clockwise rotation. The diodes connected at the two ends of the first phase winding coil are opposite to the direction of the power supply, so that the first phase winding coil is not conducted.
Fig. 4 is a schematic view of the state where the motor rotor rotation angle is 30 degrees.
Fig. 5 shows that the rotation angle of the rotor of the motor is 60 degrees, at this time, the north pole N of the permanent magnet magnetic pole on the rotor of the first-phase hall sensor is far away, the output high potential signal becomes the low potential signal, which causes the triode connected with the first stator winding coil to be cut off, the first-phase winding coil is therefore powered off, the back electromotive force voltage generated after the first-phase winding coil is powered off is opposite to the power supply voltage, the direction of the diode connected with the first stator winding coil is the same, and therefore the back electromotive force generated after the first-phase winding coil is powered off is charged to the rechargeable battery through the diode.
At the same time, the second-phase Hall sensor detects the north pole N of the permanent magnet magnetic pole on the rotor, the low potential signal is immediately changed into a high potential signal which is output to the base electrode of the triode connected with the second stator winding coil, the triode is conducted, and the power current flows to the negative pole of the power supply through the second-phase winding coil and the collector and the emitter of the triode. Because the second phase winding coil has power supply current to flow through, so produce the magnetic pole, north pole N orientation rotor, north pole N and the rotor permanent magnet magnetic pole interact that the homopolar repellent heteropolar looks attract that second phase winding coil produced makes the rotor continue to rotate clockwise. The diodes at the two ends of the second phase winding coil are opposite to the direction of the power supply and therefore do not conduct.
Fig. 6 is a schematic view of the state where the rotation angle of the motor rotor is 90 degrees.
Fig. 7 shows that the rotation angle of the rotor of the motor is 120 degrees, at this time, because the north pole N of the permanent magnet magnetic pole on the rotor is far away, the output high potential signal of the second phase hall sensor becomes a low potential signal, which causes the triode connected with the second stator winding coil to be cut off, the second phase winding coil is therefore powered off, the back electromotive force voltage generated after the second phase winding coil is powered off is opposite to the direction of the power supply voltage, and the direction of the back electromotive force is the same as that of the diode, so that the back electromotive force generated after the second phase winding coil is powered off charges the rechargeable battery (13) through the.
At the same time, the third-phase Hall sensor detects a north pole N of a permanent magnet magnetic pole on the rotor, immediately changes a low potential signal into a base electrode of a triode which outputs a high potential signal and is connected with a third stator winding coil, so that the triode is conducted, and power current flows to a power negative pole through the third-phase winding coil and a collector and an emitter of the triode. Because the third phase winding coil has the mains current to flow through, so produce the magnetic pole, north pole N orientation rotor, the north pole N that third phase winding coil produced and rotor permanent magnet magnetic pole interact, homopolar repulsion heteropolar attracting, make the rotor continue to rotate clockwise. The diodes at the two ends of the winding coil of the third phase are opposite to the direction of the power supply, so that the three-phase winding coil is not conducted.
Fig. 8 is a schematic view of the state where the rotation angle of the motor rotor is 150 degrees.
Fig. 9 shows that the rotation angle of the motor rotor is 180 degrees, at this time, the north pole N of the permanent magnet magnetic pole on the rotor of the third phase hall sensor is far away, the output high potential signal is changed into a low potential signal, which causes the triode connected with the third stator winding coil to be cut off, the third phase winding coil is therefore powered off, the back electromotive voltage generated after the third phase winding coil is powered off is opposite to the direction of the power supply voltage and the direction of the diode of the third phase winding coil is the same, and therefore the back electromotive voltage generated after the third phase winding coil is powered off charges the rechargeable battery through the diode connected with the third stator winding coil.
At the same time, the first-phase Hall sensor detects the north pole N of the permanent magnet pole on the rotor, and the steps are repeated to continuously work, so that the motor continuously rotates. Meanwhile, because the first phase winding coil, the second phase winding coil and the third phase winding coil are continuously electrified and powered off, the back electromotive force electric energy generated after the three groups of winding coils are powered off is continuously charged into the rechargeable battery.
The above-mentioned stator winding coil is a copper wire unidirectional multi-turn winding, usually winding on an iron core, the triode can be a triode, a field effect transistor, an IGBT insulated gate bipolar transistor according to different circuit application power, the diode is a common diode or a fast recovery diode, the rechargeable battery is a rechargeable battery or a rechargeable capacitor, and the wire connecting the electronic element is a copper wire.
The first stator winding coil, the second stator winding coil and the third stator winding coil are formed by winding copper wires in a multi-turn manner in a single direction, and are usually wound on a laminated stator core.
The stator core is a normal laminated stator core formed by stacking silicon steel sheets with high magnetic permeability layer by layer, and the rotor core (5) is a normal laminated rotor core formed by stacking silicon steel sheets with high magnetic permeability layer by layer.
The first permanent magnet, the second permanent magnet, the third permanent magnet and the fourth permanent magnet can be ferrite, neodymium iron boron and the like according to different magnetic forces, and the motor rotor shaft rod is a common motor rotor shaft rod.
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.
Of course, the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and the changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present invention should also belong to the protection scope of the present invention.
Claims (9)
1. The utility model provides a retrieve permanent magnet brushless motor of back electromotive force, its characterized in that, includes motor main body and drive circuit, motor main body includes stator core, rotor core, first stator winding coil, second stator winding coil, third stator winding coil, first permanent magnet, second permanent magnet, third permanent magnet, fourth permanent magnet, rotor shaft pole and hall sensor, and the south pole of first permanent magnet and second permanent magnet sets up outwards, and the north pole of third permanent magnet and fourth permanent magnet sets up outwards, hall sensor is located between stator core and the rotor core and along rotor core's periphery evenly distributed.
2. The brushless permanent magnet motor for recovering back electromotive force according to claim 1, wherein in the driving circuit, the first stator winding coil, the second stator winding coil and the third stator winding coil are connected to a positive electrode of a power supply at upper ends thereof, and are connected to a collector of a transistor at lower ends thereof, and an emitter of each transistor is connected to a negative electrode of the power supply;
the upper ends of the first stator winding coil, the second stator winding coil and the third stator winding coil are respectively connected with a diode, the upper ends of the first stator winding coil, the second stator winding coil and the third stator winding coil are connected with the negative pole of the diode, the lower ends of the first stator winding coil, the second stator winding coil and the third stator winding coil are respectively connected with a diode, the diodes connected with the upper ends of the first stator winding coil, the second stator winding coil and the third stator winding coil are connected in series and then connected with the positive pole of the rechargeable battery, and the diodes connected with the lower ends of the first stator winding coil, the second stator winding coil and the third stator winding coil are connected in series and then connected with the negative pole of.
3. A brushless permanent magnet motor for recovering back emf as in claim 2 wherein each transistor has a base connected to a signal sensor for sensing rotor core position to determine when the transistor's collector and emitter are on and off.
4. The brushless permanent magnet motor for recovering back electromotive force according to claim 3, wherein the first permanent magnet, the second permanent magnet, the third permanent magnet, and the fourth permanent magnet are disposed in the rotor core at positions of a surface-embedded permanent magnet rotor.
5. The brushless permanent magnet motor for recovering back electromotive force according to claim 3, wherein the Hall sensor is a unipolar normally closed type, and outputs a high potential when a north pole of the permanent magnet pole is close to a front surface of the Hall sensor, and outputs a low potential when a south pole of the permanent magnet pole is close to the front surface of the Hall sensor or when no magnetic field is present.
6. The brushless permanent magnet motor for recovering back electromotive force according to claim 3, wherein there are three hall sensors, which are a first phase hall sensor, a second phase hall sensor, and a third phase hall sensor.
7. The permanent magnet brushless motor for recovering back electromotive force according to claim 6, wherein the first phase hall sensor detects positions of the first permanent magnet, the second permanent magnet, the third permanent magnet, and the fourth permanent magnet to control on and off times of the first phase winding coil.
8. The permanent magnet brushless motor for recovering back electromotive force according to claim 6, wherein the second phase hall sensor is configured to detect positions of the first permanent magnet, the second permanent magnet, the third permanent magnet, and the fourth permanent magnet to control on and off times of the second phase winding coil.
9. The permanent magnet brushless motor for recovering back electromotive force according to claim 6, wherein the third phase hall sensor is configured to detect positions of the first permanent magnet, the second permanent magnet, the third permanent magnet, and the fourth permanent magnet to control on and off times of the third phase winding coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921523728.7U CN211239622U (en) | 2019-09-13 | 2019-09-13 | Permanent magnet brushless motor capable of recovering back electromotive force |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921523728.7U CN211239622U (en) | 2019-09-13 | 2019-09-13 | Permanent magnet brushless motor capable of recovering back electromotive force |
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| CN211239622U true CN211239622U (en) | 2020-08-11 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114751326A (en) * | 2022-03-31 | 2022-07-15 | 浙江阜康机械有限公司 | Permanent magnet electric capstan |
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2019
- 2019-09-13 CN CN201921523728.7U patent/CN211239622U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114751326A (en) * | 2022-03-31 | 2022-07-15 | 浙江阜康机械有限公司 | Permanent magnet electric capstan |
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