CN214177011U

CN214177011U - Motor for recovering back electromotive force in operation

Info

Publication number: CN214177011U
Application number: CN202120365366.4U
Authority: CN
Inventors: 邢磊
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-02-09
Filing date: 2021-02-09
Publication date: 2021-09-10
Anticipated expiration: 2031-02-09

Abstract

The utility model provides a motor for recovering back electromotive force in operation, the motor main body comprises a rotor, a stator, three groups of stator winding coils, a forward Hall sensor and a reverse Hall sensor; in the driving circuit, the upper end of a first coil in each stator winding coil is connected with the cathode of a first diode and a direct current power supply line DC +, the lower end of the first coil is connected with the anode of a second diode and the drain electrode D of a first field effect tube, the source electrode S of the first field effect tube is connected with the direct current power supply line DC-, and the grid electrode G is connected with a signal wire of a forward Hall sensor; the lower end of the second coil is connected with the cathode of the third diode and the DC power line DC +, the upper end of the second coil is connected with the anode of the fourth diode and the drain D of the second field effect transistor, the source S of the second field effect transistor is connected with the DC power line DC-, and the grid G is connected with the signal wire of the reverse Hall sensor; the anodes of the first diodes are connected with the cathodes of the rechargeable batteries; the cathodes of the plurality of second diodes are connected with the anode of the rechargeable battery.

Description

Motor for recovering back electromotive force in operation

Technical Field

The utility model belongs to the technical field of the motor, a direct current permanent magnet brushless motor is related to, especially a motor of retrieving back electromotive force in the operation.

Background

The motor is an electromagnetic device which converts or transmits electric energy according to the law of electromagnetic induction, or converts one form of electric energy into another form of electric energy. The electric motor converts electric energy into mechanical energy (commonly called as a motor), and the generator converts mechanical energy into electric energy. Its main function is to generate driving torque as power source of electric appliance or various machines.

In the field of dc brushless motor technology, the driving method of the dc brushless motor is all available on the market, and three-phase driving circuit has been used for many years, and although there have been many optimization and improvement based on the three-phase brushless motor driving circuit for many years, there is no subversive technical innovation.

SUMMERY OF THE UTILITY MODEL

The utility model aims at having above-mentioned problem to current technique, provided one kind and added two diodes opposite with mains voltage direction at stator coil both ends, but rechargeable battery is connected to the other end of two diodes, realizes the motor of energy-conserving continuation of journey's recovery back electromotive force in the operation.

The purpose of the utility model can be realized by the following technical proposal: a motor for recovering back electromotive force in operation comprises a motor main body and a driving circuit, wherein the motor main body comprises a rotor fixedly sleeved on a rotating shaft, a stator is sleeved on the outer periphery of the rotor, at least three groups of stator winding coils are centrally and symmetrically distributed on the inner periphery of the stator, each stator winding coil is provided with a first coil and a second coil, a forward Hall sensor and a reverse Hall sensor which are matched in groups are arranged between every two adjacent stator winding coils, at least four permanent magnets are fixedly arranged on the rotor, the permanent magnets are uniformly distributed on the outer periphery of the rotor to form a centrally symmetrical structure, and N poles and S poles of the adjacent permanent magnets are arranged in a staggered mode;

in the driving circuit, the upper end of the first coil in each stator winding coil is connected with the cathode of a first diode and a direct current power supply line DC +, the lower end of the first coil is connected with the anode of a second diode and the drain electrode D of a first field effect tube, the source electrode S of the first field effect tube is connected with the direct current power supply line DC-, and the grid electrode G is connected with a signal wire of the forward Hall sensor; the lower end of the second coil is connected with the cathode of the third diode and the direct current power supply line DC +, the upper end of the second coil is connected with the anode of the fourth diode and the drain electrode D of the second field effect transistor, the source electrode S of the second field effect transistor is connected with the direct current power supply line DC-, and the grid electrode G is connected with the signal wire of the reverse Hall sensor; the anodes of the first diodes are connected with the cathodes of the rechargeable batteries; the cathodes of the second diodes are connected with each other and also connected with the anode of the rechargeable battery.

In the motor for recovering the counter electromotive force in the operation, the number of the stator winding coils is three, and the adjacent stator winding coils are uniformly distributed with an included angle of 120 degrees; the number of the permanent magnets is four, and the adjacent permanent magnets are uniformly distributed with an included angle of 90 degrees.

In the above-described motor for recovering back electromotive force during operation, the stator winding coil has a stator core, and the first coil and the second coil are wound around the stator core in a double-line manner.

In the above-described motor for recovering back electromotive force during operation, the forward hall sensor is located above and the front surface thereof faces the rotor, and the reverse hall sensor is located below and the back surface thereof faces the rotor.

In the motor for recovering the counter electromotive force during the operation, a DC power source for driving the motor main body to rotate is directly connected between the DC power supply line DC + and the DC power supply line DC-.

In the motor for recovering the counter electromotive force during the operation, the direct current power supply line DC + and the direct current power supply line DC-are connected to a direct current speed regulator for regulating the speed of the motor main body, and then connected to a direct current power supply for driving the motor main body to rotate.

Compared with the prior art, this motor of retrieving back electromotive force in the operation has following beneficial effect: the utility model discloses abandoned traditional three-phase DC brushless motor's drive mode to a brand-new DC drive method drive brushless motor, need not any current conversion and drive motor again, with direct current direct drive, saved current conversion's loss. The utility model discloses a speed governing method adopts the speed governing mode that has the brush motor, the speed governing is with low costs to require lowly, start-up and speed governing performance are good, the even smoothness of speed governing, can stepless speed regulation, the speed governing scope is wide, this motor brushless never wears out, the torque ratio is great, the dependable performance, long service life (depending on the bearing quality), the low noise fault rate is low, the overload capacity is strong, receive electromagnetic interference for a short time, still have all advantages such as permanent magnet brushless motor's high efficiency, simultaneously maximum energy-conservation, energy-conserving effect direct body is now charging and storing rechargeable battery with the back electromotive force electric energy of retrieving, can obviously effectively increase to be the power energy with rechargeable battery, for the continuation of the journey of motor drive towed vehicle, realize the environmental protection and energy saving theory.

Drawings

Fig. 1 is a connection diagram of the motor main body and the driving circuit in practical application of the present invention.

Fig. 2 is a schematic structural view of the motor main body of the present invention.

Fig. 3 is the group-matched hall sensor actual position diagram of the present invention.

Fig. 4 is a schematic structural diagram of the driving circuit of the present invention.

Fig. 5 is a schematic structural view of the motor body of the present invention rotating clockwise by 0 degree.

Fig. 6 is a schematic structural view of the motor body of the present invention rotating 30 degrees clockwise.

Fig. 7 is a schematic structural view of the motor body of the present invention rotating 60 degrees clockwise.

Fig. 8 is a schematic structural view of the motor body of the present invention rotating 90 degrees clockwise.

Fig. 9 is a schematic structural view of the motor body of the present invention rotating 120 degrees clockwise.

Fig. 10 is a schematic structural view of the motor body of the present invention rotating 150 degrees clockwise.

Fig. 11 is a schematic structural view of the motor body of the present invention rotating 180 degrees clockwise.

In the figure, a motor main body; B. a drive circuit; 1. a first coil; 2. a second coil; 3. a third coil; 4. a fourth coil; 5. a fifth coil; 6. a sixth coil; 7. a forward Hall sensor I; 8. a first reverse Hall sensor; 9. a second forward Hall sensor; 10. a second reverse Hall sensor; 11. a forward Hall sensor III; 12. a reverse Hall sensor III; 13. a first permanent magnet; 14. a permanent magnet II; 15. a permanent magnet III; 16. a permanent magnet IV; 17. a stator; 18. a rotor; 19. a rotating shaft; 20. a first diode; 21. a second diode; 22. a third diode; 23. a fourth diode; 24. a fifth diode; 25. a sixth diode; 26. a seventh diode; 27. an eighth diode; 28. a ninth diode; 29. a twelfth pole tube; 30. an eleventh diode; 31. a twelfth diode; 32. a rechargeable battery; 33. a first field effect transistor; 34. a second field effect transistor; 35. a third field effect transistor; 36. a fourth field effect transistor; 37. a fifth field effect transistor; 38. and a sixth field effect transistor.

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 to 4, the motor for recovering back electromotive force during operation includes a motor main body a and a driving circuit B, the motor main body a includes a rotor 18 fixedly sleeved on a rotating shaft 19, a stator 17 is sleeved on an outer periphery of the rotor 18, a first stator winding coil, a second stator winding coil and a third stator winding coil are distributed on an inner periphery of the stator 17 in a central symmetry manner, the first stator winding coil has a first coil 1 and a second coil 2, the second stator winding coil has a third coil 3 and a fourth coil 4, the third stator winding coil has a fifth coil 5 and a sixth coil 6, a first forward hall sensor 7 and a first reverse hall sensor 8 which are matched in groups are arranged between the third stator winding coil and the first stator winding coil, a second forward hall sensor 9 and a second reverse hall sensor 10 which are matched in groups are arranged between the first stator winding coil and the second stator winding coil, a third forward Hall sensor 11 and a third reverse Hall sensor 12 which are matched in a group are arranged between the second stator winding coil and the third stator winding coil, a first permanent magnet 13, a second permanent magnet 14, a third permanent magnet 15 and a fourth permanent magnet 16 are fixedly arranged on the rotor 18, the first permanent magnet 13, the second permanent magnet 14, the third permanent magnet 15 and the fourth permanent magnet 16 are uniformly distributed on the periphery of the rotor 18 to form a central symmetrical structure, and the N poles and the S poles of the first permanent magnet 13, the second permanent magnet 14, the third permanent magnet 15 and the fourth permanent magnet 16 are arranged in a staggered mode.

In the driving circuit B, the upper end of the first coil 1 is connected to the cathode of the first diode 20 and the DC power line DC +, the lower end is connected to the anode of the second diode 21 and the drain D of the first fet 33, the source S of the first fet 33 is connected to the DC power line DC-, and the gate G is connected to the signal line of the forward hall sensor i 7 (fig. 1 only shows the signal line connection method of the hall sensor, the connection method for supplying power to the hall sensor is a conventional method, and can be easily implemented by those skilled in the art); the lower end of the second coil 2 is connected with the cathode of the third diode 22 and the direct current power supply line DC +, the upper end of the second coil is connected with the anode of the fourth diode 23 and the drain D of the second field effect tube 34, the source S of the second field effect tube 34 is connected with the direct current power supply line DC-, and the grid G is connected with a signal wire of the first reverse Hall sensor 8;

the upper end of the third coil 3 is connected with the cathode of the fifth diode 24 and the direct current power supply line DC +, the lower end is connected with the anode of the sixth diode 25 and the drain D of the third field-effect tube 35, the source S of the third field-effect tube 35 is connected with the direct current power supply line DC-, and the grid G is connected with the signal line of the forward Hall sensor II 9; the lower end of the fourth coil 4 is connected with the cathode of the seventh diode 26 and the direct current power supply line DC +, the upper end of the fourth coil is connected with the anode of the eighth diode 27 and the drain D of the fourth field-effect tube 36, the source S of the fourth field-effect tube 36 is connected with the direct current power supply line DC-, and the grid G is connected with the signal line of the second reverse Hall sensor 10;

the upper end of the fifth coil 5 is connected with the cathode of the ninth diode 28 and the direct current power supply line DC +, the lower end is connected with the anode of the twelfth diode 29 and the drain D of the fifth field effect tube 37, the source S of the fifth field effect tube 37 is connected with the direct current power supply line DC-, and the grid G is connected with the signal line of the forward Hall sensor III 11; the lower end of the sixth coil 6 is connected with the cathode of the eleventh diode 30 and the direct current power supply line DC +, the upper end is connected with the anode of the twelfth diode 31 and the drain D of the sixth field effect tube 38, the source S of the sixth field effect tube 38 is connected with the direct current power supply line DC-, and the grid G is connected with the signal line of the third reverse Hall sensor 12;

the anode of the first diode 20, the anode of the third diode 22, the anode of the fifth diode 24, the anode of the seventh diode 26, the anode of the ninth diode 28 and the anode of the eleventh diode 30 are connected, and are also connected with the cathode of the rechargeable battery; the cathode of the second diode 21, the cathode of the fourth diode 23, the cathode of the sixth diode 25, the cathode of the eighth diode 27, the cathode of the twelfth diode 29 and the cathode of the twelfth diode 31 are connected, and further connected with the anode of the rechargeable battery.

The motor is a direct-current permanent magnet brushless motor, three groups of stator winding coils are adopted, and four rotor magnetic poles are arranged in an N, S-pole staggered mode. In actual production and application, the number of stator winding coils and the number of rotor magnetic poles can be correspondingly increased according to market demands and actual use requirements, torque, rotating speed, power and the like, and the structure of the motor can be cylindrical, disc-type, inner rotor-type and outer rotor-type, but the basic principle is not changed. The first group of forward Hall sensors 7 and the first reverse Hall sensors 8, the second group of forward Hall sensors 9 and the second reverse Hall sensors 10, the third group of forward Hall sensors 11 and the third reverse Hall sensors 12 are arranged in a central symmetry mode, and the three groups of Hall sensors are located between the stator and the rotor and are evenly distributed along the periphery of the rotor. The first forward Hall sensor 7, the first reverse Hall sensor 8, the second forward Hall sensor 9, the second reverse Hall sensor 10, the third forward Hall sensor 11 and the third reverse Hall sensor 12 are all of a single-pole normally-closed type, when a north pole N of a permanent magnet magnetic pole is close to the front face of the Hall sensor, the Hall sensor outputs a high potential (is turned on), and when a south pole S of the permanent magnet magnetic pole is close to the front face of the Hall sensor or no magnetic field exists, the Hall sensor outputs a low potential (is turned off). When the south pole S of the permanent magnet magnetic pole is close to the back surface of the Hall sensor, the Hall sensor outputs high potential (is turned on), and when the north pole N of the permanent magnet magnetic pole is close to the back surface of the Hall sensor or no magnetic field exists, the Hall sensor outputs low potential (is turned off).

The first to twelfth diodes 31 may be replaced by fast recovery diodes. The first to sixth fets 38 may be replaced with transistors or IGBTs. The rechargeable battery may be replaced by a capacitor. All the connecting wires in the driving circuit B are copper wires. The rechargeable battery is various containers for storing electric energy, such as a lithium battery, a super capacitor, a fuel cell, a solid-state battery and the like.

The first stator winding coil is provided with a first stator iron core, and the first coil 1 and the second coil 2 are wound on the first stator iron core in the same direction; the second stator winding coil is provided with a second stator core, and the third coil 3 and the fourth coil 4 are wound on the second stator core in the same direction; the third stator winding coil has a third stator core, and the fifth coil 5 and the sixth coil 6 are wound on the third stator core in the same direction. In the three stator cores, each stator core is a homodromous double wire and is wound by two groups of coils, and the two groups of coils can generate a magnetic pole N and a magnetic pole S to face the rotor after being respectively electrified. Wherein the first coil 1, the third coil 3 and the fifth coil 5 are energized to produce only the magnetic pole N towards the rotor, and wherein the second coil 2, the fourth coil 4 and the sixth coil 6 are energized to produce only the magnetic pole S towards the rotor.

The forward Hall sensor I7 is positioned above the rotor, the front surface of the forward Hall sensor I faces the rotor, and the reverse Hall sensor I8 is positioned below the rotor, and the back surface of the reverse Hall sensor I faces the rotor; the second forward Hall sensor 9 is positioned above the rotor, the front surface of the second forward Hall sensor faces the rotor, and the second reverse Hall sensor 10 is positioned below the rotor, and the back surface of the second reverse Hall sensor faces the rotor; the forward hall sensor three 11 is located above with its front facing the rotor, and the reverse hall sensor three 12 is located below with its back facing the rotor.

The power supply connection mode adopts the following two schemes:

according to the first scheme, a direct-current power supply for driving the motor main body A to rotate is directly connected between the direct-current power supply line DC + and the direct-current power supply line DC-.

And in the second scheme, the direct current power supply line DC + and the direct current power supply line DC-are connected with a direct current speed regulator for regulating the speed of the motor main body A firstly, and then are connected with a direct current power supply for driving the motor main body A to rotate.

The scheme does not show the connection method of the direct current power supply and the direct current speed regulator, and the connection method of the direct current power supply and the direct current speed regulator is a conventional method and can be easily implemented by a person skilled in the art.

The operation method of the motor for recovering the counter electromotive force in the running process comprises the following steps:

FIG. 5 shows the rotor rotating clockwise by 0 degree

Fig. 5 is a top view, the lowermost core is a first stator core, and the first coil 1 and the second coil 2 are co-directional and wound on the first stator core. And taking the anticlockwise direction as a standard, the next stator core is taken as a second stator core, and the third coil 3 and the fourth coil 4 are in the same direction and wound on the second stator core. And taking the anticlockwise direction as a standard, the next stator core is the third stator core, and the fifth coil 5 and the sixth coil 6 are in the same direction and wound on the third stator core.

Fig. 5 is a top view, in which the permanent magnet 13 on the rotor facing the lowermost first stator core has its N-pole facing outward, and with respect to the counterclockwise direction, the permanent magnet 14 has its S-pole facing outward, the permanent magnet 15 has its N-pole facing outward, and the permanent magnet 16 has its S-pole facing outward.

In fig. 5, at the first time, the forward hall sensor one 7 and the reverse hall sensor one 8 shown in fig. 2 simultaneously face the N pole of the permanent magnet 13 on the rotor, and since the front face of the forward hall sensor one 7 in fig. 2 faces the N pole of the permanent magnet 13 on the rotor and the forward hall sensor one 7 in fig. 2 senses the N pole of the permanent magnet 13 on the rotor, the state is changed from the off state to the on state. (since the front surface of the forward hall sensor i 7 in fig. 2 faces the rotor, the permanent magnet N pole is turned on only when the forward hall sensor i senses that the rotor is provided with the permanent magnet N pole, and the front surface faces the permanent magnet S pole or is turned off when no magnetic field exists). Since the gate G of the first fet 33 in fig. 4 is connected to the signal line of the first forward hall sensor 7 in fig. 2, the gate G of the first fet 33 in fig. 4 receives the on signal of the first forward hall sensor 7 in fig. 2, and the first fet 33 in fig. 4 is turned from the off-state to the on-state. In fig. 4, the current of the DC power supply DC + is now passed through the first coil 1, through the drain D and the source S of the first fet 33 and finally to the DC power supply DC-. Since the first coil 1 has current flowing through it, the first coil 1 generates magnetic pole N towards the rotor, and since the N pole of the permanent magnet 13 on the rotor in fig. 2 is opposite to the magnetic pole N generated by the first coil 1, but the N pole of the permanent magnet 13 on the rotor is located to the left, and the magnetic pole N generated by the first coil 1 is closest to the S pole of the permanent magnet 14 adjacent to the counterclockwise direction of the N pole of the permanent magnet 13 on the rotor which is opposite at that time, the magnetic pole N generated by the first coil 1 pushes the N pole of the permanent magnet 13 on the rotor in the clockwise direction and attracts the S pole of the permanent magnet 14 on the rotor which is closest to the first coil 1, so that the rotor starts to rotate in the clockwise direction. At this time, since the first diode 20 and the second diode 21 connected in parallel with the first coil 1 in fig. 4 are opposite to the direction of the power supply voltage, they are not conducted.

In fig. 5, at the same time, since the back surface of the first hall sensor 8 in fig. 2 faces the N pole of the permanent magnet 13 on the rotor, the first hall sensor 8 in fig. 2 is in an off state (since the back surface of the first hall sensor 8 in fig. 2 faces the rotor, the S pole of the permanent magnet on the rotor is only sensed to be on, and the back surface faces the N pole of the permanent magnet or is in an off state when no magnetic field is applied). Since the first hall sensor 8 in fig. 2 controls the second fet 34 in fig. 4 to be turned on and off, the first hall sensor 8 in fig. 2 is turned off, which causes the second fet 34 in fig. 4 to be turned off, so that the second coil 2 does not pass current and is not operated.

In fig. 5, at the same time, the second forward hall sensor 9 and the second reverse hall sensor 10 shown in fig. 2 are facing the S pole of the permanent magnet 14 on the rotor, and since the front surface of the second forward hall sensor 9 in fig. 2 faces the S pole of the permanent magnet 14 on the rotor, the second forward hall sensor 9 in fig. 2 is in an off state (since the front surface of the second forward hall sensor 9 in fig. 2 faces the rotor, only the N pole of the permanent magnet on the rotor is sensed to be on, and the front surface faces the S pole of the permanent magnet or is in an off state when no magnetic field is present). Since the second forward hall sensor 9 in fig. 2 controls the third fet 35 in fig. 4 to turn on and off, and the second forward hall sensor 9 in fig. 2 is in an off state at this time, the third fet 35 in fig. 4 is in an off state, so that the third coil 3 has no current flowing through it and thus does not operate.

In fig. 5, at the same time, since the back surface of the second hall sensor 10 in fig. 2 faces the S pole of the permanent magnet 14 on the rotor, the second hall sensor 10 in fig. 2 senses the S pole of the permanent magnet 14 on the rotor, and thus the state is changed from the off state to the on state. (since the back of the second reverse hall sensor 10 in fig. 2 faces the rotor, the S pole of the permanent magnet on the rotor is only sensed to be turned on, and the back faces the N pole of the permanent magnet or is turned off when no magnetic field is generated). Since the gate G of the fourth fet 36 in fig. 4 is connected to the signal line of the second hall sensor 10 in fig. 2, the gate G of the fourth fet 36 in fig. 4 receives the on signal of the second hall sensor 10 in fig. 2, and the fourth fet 36 in fig. 4 turns from the off-state to the on-state. In fig. 4, the current of the DC power supply DC + is now passed through the fourth coil 4, through the drain D and the source S of the fourth fet 36 and finally to the DC power supply DC-. Since the fourth coil 4 has current flowing through it, the fourth coil 4 generates magnetic poles S toward the rotor, and at this time, in fig. 5, the magnetic poles S generated by the fourth coil 4 just push the S pole of the permanent magnet 14 on the rotor in the clockwise direction and attract the N pole of the next permanent magnet 15 on the rotor, resulting in the rotor rotating in the clockwise direction, depending on the position of the fourth coil 4 and the position of the permanent magnet poles on the rotor. At this time, since the seventh diode 26 and the eighth diode 27 connected in parallel with the fourth coil 4 in fig. 4 are opposite to the direction of the power supply voltage, they are not conducted.

In fig. 5, at the same time, since the rotor rotates in the clockwise direction, the forward hall sensor three 11 and the reverse hall sensor three 12 in fig. 2 are in a non-magnetic field state at this time, since the forward hall sensor three 11 in fig. 2 controls the on and off of the fifth fet 37 in fig. 4, the reverse hall sensor three 12 in fig. 2 controls the on and off of the sixth fet 38 in fig. 4, and the forward hall sensor three 11 and the reverse hall sensor three 12 in fig. 2 are in an off state at this time, the fifth fet 37 in fig. 4 is caused to be in an off state, and the sixth fet 38 is caused to be in an off state, so that the fifth coil 5 and the sixth coil 6 do not pass current and thus do not operate.

FIG. 6 shows the rotor rotated 30 degrees clockwise

In fig. 6, the rotor rotates 30 degrees clockwise, and at the same time, while the forward hall sensor one 7 in fig. 2 is being turned on, the on signal of the forward hall sensor one 7 is controlling the conduction on of the first fet 33 in fig. 4, the first coil 1 continues to generate the magnetic pole N toward the rotor, continues to push the N pole of the permanent magnet 13 on the rotor in the clockwise direction, and attracts the S pole of the permanent magnet 14 on the rotor next closest to the first coil 1, so that the rotor continues to rotate in the clockwise direction.

In fig. 6, at the same time, the first inverse hall sensor 8 in fig. 2 continues to keep in the off state, and since the first inverse hall sensor 8 in fig. 2 controls the second fet 34 in fig. 4 to be turned on and off, and the first inverse hall sensor 8 in fig. 2 is in the off state, the second fet 34 in fig. 4 is in the off state, so that no current flows through the second coil 2, and therefore the second coil does not operate.

In fig. 6, at the same time, the second forward hall sensor 9 in fig. 2 continues to keep in the off state, and since the second forward hall sensor 9 in fig. 2 controls the third fet 35 in fig. 4 to be turned on and off, and the second forward hall sensor 9 in fig. 2 is in the off state, the third fet 35 in fig. 4 is in the off state, so that no current flows through the third coil 3, and therefore the third coil does not operate.

In fig. 6, at the same time, since the rotor rotates clockwise, the S pole of the permanent magnet 14 on the rotor is away from the second reverse hall sensor 10 in fig. 2, (the second reverse hall sensor 10 is in an on state when the back surface of the second reverse hall sensor faces the S pole of the permanent magnet, and is in an off state when the back surface of the second reverse hall sensor 10 faces the N pole of the permanent magnet and is in an off state when no magnetic field exists), the second reverse hall sensor 10 in fig. 2 is turned from the on signal state to the off state, and since the second reverse hall sensor 10 in fig. 2 controls the on and off of the fourth fet 36 in fig. 4, the fourth fet 36 in fig. 4 is also turned from the on state to the off state. The current through the fourth coil 4 is interrupted, and at the moment of power failure, the magnetic field stored in the fourth coil 4 is released in the form of electric energy, called back electromotive force, whose voltage direction is opposite to the power supply voltage direction, and is released in the form of high voltage (at this time, the fourth coil 4 is equivalent to an inductor, which can store electric energy in the form of magnetic field, and when it is energized, it stores a large amount of magnetic field, and when the fourth fet 36 is switched from the on state to the off state, the fourth coil 4 is powered off, and at this time, the magnetic field generated by the fourth coil 4 does not disappear, and this magnetic field will generate back electromotive force). The voltage generated by the back electromotive force is opposite to the direction of the power voltage, and the direction of the voltage of the seventh diode 26 and the eighth diode 27 connected in parallel with the fourth coil 4 in fig. 4 is the same, and the back electromotive force is timely derived by the seventh diode 26 and the eighth diode 27 in fig. 4, and the rechargeable battery 32 in fig. 4 is charged and stored with the electric energy.

In fig. 6, at the same time, the forward hall sensor three 11 and the reverse hall sensor three 12 shown in fig. 2 simultaneously face the S pole of the permanent magnet 16 on the rotor, and since the front surface of the forward hall sensor three 11 in fig. 2 faces the S pole of the permanent magnet 16 on the rotor, the forward hall sensor three 11 in fig. 2 is in an off state (since the front surface of the forward hall sensor three 11 in fig. 2 faces the rotor, only the N pole of the permanent magnet on the rotor is sensed to be on, and the front surface faces the S pole of the permanent magnet or is in an off state when no magnetic field is present). Since the forward hall sensor three 11 in fig. 2 controls the on/off of the fifth fet 37 in fig. 4, the forward hall sensor three 11 in fig. 2 is in an off state at this time, which causes the fifth fet 37 in fig. 4 to be in an off state, the fifth coil 5 has no current flowing through it and thus does not operate.

In fig. 6, at the same time, since the back surface of the three reverse hall sensors 12 in fig. 2 faces the S pole of the permanent magnet 16 on the rotor, the three reverse hall sensors 12 in fig. 2 sense the S pole of the permanent magnet 16 on the rotor, and thus the state is changed from the off state to the on state. (since the back of the third hall sensor 12 in fig. 2 faces the rotor, the S pole of the permanent magnet is turned on only when the magnetic field is sensed on the rotor, and the back faces the N pole of the permanent magnet or is turned off when no magnetic field is generated). Since the gate G of the sixth fet 38 in fig. 4 is connected to the signal line of the third hall sensor 12 in fig. 2, the gate G of the sixth fet 38 in fig. 4 receives the on signal of the third hall sensor 12 in fig. 2, and the sixth fet 38 in fig. 4 turns from the off-state to the on-state. In fig. 4, the current of the DC power supply DC + passes through the sixth winding 6, then through the drain D and the source S of the sixth fet 38, and finally to the DC power supply DC-. Since the current passes through the sixth coil 6, the sixth coil 6 generates a magnetic pole S facing the rotor, and since the S pole of the permanent magnet 16 on the rotor in fig. 2 is opposite to the magnetic pole S generated by the sixth coil 6, but the S pole of the permanent magnet 16 on the rotor is located to the left, and the magnetic pole S generated by the sixth coil 6 is closest to the N pole of the permanent magnet 13 adjacent to the counterclockwise direction of the S pole of the permanent magnet 16 on the rotor which is opposite at that time, the magnetic pole S generated by the sixth coil 6 pushes the S pole of the permanent magnet 16 on the rotor in the clockwise direction and attracts the N pole of the permanent magnet 13 on the rotor which is closest to the sixth coil 6, so that the rotor continues to rotate in the clockwise direction. At this time, the eleventh diode 30 and the twelfth diode 31 connected in parallel with the sixth coil 6 in fig. 4 are not conducted because they are opposite to the direction of the power supply voltage.

FIG. 7 shows the rotor rotating 60 degrees clockwise

In fig. 7, the rotor rotates 60 degrees clockwise, and at the same time, since the rotor rotates clockwise, the N pole of the permanent magnet 13 on the rotor is away from the forward hall sensor one 7 in fig. 2, (the forward hall sensor one 7 is in an on state when facing the N pole of the permanent magnet, and the forward hall sensor one 7 is in an off state when facing the S pole of the permanent magnet and when there is no magnetic field), the forward hall sensor one 7 in fig. 2 is turned from an on signal state to an off state, and since the forward hall sensor one 7 in fig. 2 controls the on and off of the first fet 33 in fig. 4, the first fet 33 in fig. 4 is also turned from the on state to the off state. The current through the first coil 1 is cut off, and at the moment of power failure, the magnetic field stored in the first coil 1 is released in the form of electric energy, called back electromotive force, the voltage direction of the back electromotive force is opposite to the power supply voltage direction, and the magnetic field is released in the form of high voltage (at this time, the first coil 1 is equivalent to an inductor which can store electric energy in the form of magnetic field, when the inductor is powered on, a large amount of magnetic field is stored, when the first fet 33 is switched from the on state to the off state, the first coil 1 is powered off, and at this time, the magnetic field generated by the first coil 1 does not disappear, and the magnetic field generates back electromotive force). The voltage generated by the back electromotive force is opposite to the direction of the power voltage, and the direction of the voltage of the first diode 20 and the second diode 21 connected in parallel with the first coil 1 in fig. 4 is the same, and the back electromotive force is timely derived by the first diode 20 and the second diode 21 in fig. 4, and the rechargeable battery 32 in fig. 4 is charged and stored with the electric energy.

In fig. 7, at the same time, the first inverse hall sensor 8 in fig. 2 continues to keep in the off state, and since the first inverse hall sensor 8 in fig. 2 controls the second fet 34 in fig. 4 to be turned on and off, and the first inverse hall sensor 8 in fig. 2 is in the off state, the second fet 34 in fig. 4 is in the off state, so that no current flows through the second coil 2, and therefore the second coil does not operate.

In fig. 7, for the first time, the second forward hall sensor 9 and the second reverse hall sensor 10 shown in fig. 2 simultaneously face the N pole of the permanent magnet 15 on the rotor, and since the front face of the second forward hall sensor 9 in fig. 2 faces the N pole of the permanent magnet 15 on the rotor and the second forward hall sensor 9 in fig. 2 senses the N pole of the permanent magnet 15 on the rotor, the state is changed from the off state to the on state. (since the front surface of the second forward hall sensor 9 in fig. 2 faces the rotor, the N pole of the permanent magnet on the rotor is only sensed to be turned on, and the front surface faces the S pole of the permanent magnet or is turned off when no magnetic field exists). Since the gate G of the third fet 35 in fig. 4 is connected to the signal line of the second forward hall sensor 9 in fig. 2, the gate G of the third fet 35 in fig. 4 receives the on signal of the second forward hall sensor 9 in fig. 2, and the third fet 35 in fig. 4 turns from the off-state to the on-state. In fig. 4, the current of the DC power DC + passes through the third coil 3, then through the drain D and source S of the third fet 35, and finally to the DC power DC-. Since the third coil 3 passes through the current, the third coil 3 generates a magnetic pole N toward the rotor, and since the N pole of the permanent magnet 15 on the rotor in fig. 2 is opposite to the magnetic pole N generated by the third coil 3, but the N pole of the permanent magnet 15 on the rotor is positioned to the left, and the magnetic pole N generated by the third coil 3 is closest to the S pole of the permanent magnet 16 adjacent to the counterclockwise direction of the N pole of the permanent magnet 15 on the rotor which is opposite at the moment, the magnetic pole N generated by the third coil 3 pushes the N pole of the permanent magnet 15 on the rotor in the clockwise direction and attracts the S pole of the permanent magnet 16 closest to the third coil 3 on the rotor, so that the rotor continues to rotate in the clockwise direction. At this time, the fifth diode 24 and the sixth diode 25 connected in parallel with the third coil 3 in fig. 4 are not conducted because they are opposite to the power supply voltage direction.

In fig. 7, at the same time, since the back surface of the second hall sensor 10 in fig. 2 faces the N pole of the permanent magnet 15 on the rotor, the second hall sensor 10 in fig. 2 is in an off state (since the back surface of the second hall sensor 10 in fig. 2 faces the rotor, only the S pole of the permanent magnet on the rotor is sensed to be on, and the back surface faces the N pole of the permanent magnet or is in an off state when no magnetic field is generated). Since the second hall sensor 10 in fig. 2 controls the fourth fet 36 in fig. 4 to turn on and off, the second hall sensor 10 in fig. 2 is in an off state at this time, which causes the fourth fet 36 in fig. 4 to turn off, so that no current flows through the fourth coil 4, and therefore the fourth coil is not operated.

In fig. 7, at the same time, the forward hall sensor three 11 and the reverse hall sensor three 12 shown in fig. 2 are facing the S pole of the permanent magnet 16 on the rotor, and at this time, the forward hall sensor three 11 in fig. 2 continues to maintain the off state, and since the forward hall sensor three 11 in fig. 2 controls the on and off of the fifth fet 37 in fig. 4, and the forward hall sensor three 11 in fig. 2 is in the off state at this time, the fifth fet 37 in fig. 4 is in the off state, the fifth coil 5 does not pass current, and thus does not operate.

In fig. 7, at the same time, when the reverse hall sensor three 12 in fig. 2 is being turned on, the on signal of the reverse hall sensor three 12 is controlling the conduction on of the sixth fet 38 in fig. 4, the sixth coil 6 continues to generate the magnetic pole S toward the rotor, continues to push the S pole of the permanent magnet 16 on the rotor in the clockwise direction, and attracts the N pole of the permanent magnet 13 on the rotor next closest to the sixth coil 6, so that the rotor continues to rotate in the clockwise direction.

FIG. 8 shows the rotor rotated 90 degrees clockwise

In fig. 8, the rotor rotates 90 degrees clockwise, and at the same time, the forward hall sensor 17 and the reverse hall sensor 8 shown in fig. 2 simultaneously face the S pole of the permanent magnet 14 on the rotor, and since the front surface of the forward hall sensor 17 in fig. 2 faces the S pole of the permanent magnet 14 on the rotor, the forward hall sensor 17 in fig. 2 is in an off state (since the front surface of the forward hall sensor 17 in fig. 2 faces the rotor, only the N pole of the permanent magnet on the rotor is sensed to be on, and the front surface faces the S pole of the permanent magnet or is in an off state when no magnetic field is present). Since the forward hall sensor one 7 in fig. 2 controls the on/off of the first fet 33 in fig. 4, the forward hall sensor one 7 in fig. 2 is in an off state at this time, which causes the first fet 33 in fig. 4 to be in an off state, so that the first coil 1 does not pass current and therefore does not work.

In fig. 8, at the same time, since the back surface of the first reverse hall sensor 8 in fig. 2 faces the S pole of the permanent magnet 14 on the rotor, the first reverse hall sensor 8 in fig. 2 senses the S pole of the permanent magnet 14 on the rotor, and thus the state is changed from the off state to the on state. (since the back of the first reverse hall sensor 8 in fig. 2 faces the rotor, the S pole of the permanent magnet on the rotor is only sensed to be turned on, and the back faces the N pole of the permanent magnet or is turned off when no magnetic field exists). Since the gate G of the second fet 34 in fig. 4 is connected to the signal line of the first hall sensor 8 in fig. 2, the gate G of the second fet 34 in fig. 4 receives the on signal of the first hall sensor 8 in fig. 2, and the second fet 34 in fig. 4 turns from the off-state to the on-state. In fig. 4, the current of the DC power supply DC + is passed through the second coil 2, through the drain D and the source S of the second fet 34, and finally to the DC power supply DC-. Since the second coil 2 has current flowing through it, the second coil 2 generates magnetic poles S towards the rotor, and since the S pole of the permanent magnet 14 on the rotor in fig. 2 is opposite to the magnetic pole S generated by the second coil 2, but the S pole of the permanent magnet 14 on the rotor is located to the left, and the magnetic pole S generated by the second coil 2 is closest to the N pole of the permanent magnet 15 adjacent to the counterclockwise direction of the S pole of the permanent magnet 14 on the rotor which is opposite at that time, the magnetic pole S generated by the second coil 2 pushes the S pole of the permanent magnet 14 on the rotor in the clockwise direction and attracts the N pole of the permanent magnet 15 on the rotor which is closest to the second coil 2, so that the rotor continues to rotate in the clockwise direction. At this time, the third diode 22 and the fourth diode 23 connected in parallel with the second coil 2 in fig. 4 are not conducted because they are opposite to the direction of the power supply voltage.

In fig. 8, at the same time, the second forward hall sensor 9 and the second reverse hall sensor 10 shown in fig. 2 are facing the N pole of the permanent magnet 15 on the rotor, and at this time, the second forward hall sensor 9 in fig. 2 is being turned on, the on signal of the second forward hall sensor 9 is controlling the conduction on of the third fet 35 in fig. 4, the third coil 3 continues to generate the magnetic pole N toward the rotor, continues to push the N pole of the permanent magnet 15 on the rotor in the clockwise direction, and attracts the S pole of the permanent magnet 16 on the rotor next closest to the third coil 3, so that the rotor continues to rotate in the clockwise direction.

In fig. 8, at the same time, the second hall sensor 10 in fig. 2 continues to keep in the off state, and since the second hall sensor 10 in fig. 2 controls the fourth fet 36 in fig. 4 to be turned on and off, and the second hall sensor 10 in fig. 2 is in the off state, the fourth fet 36 in fig. 4 is in the off state, so that no current flows through the fourth coil 4, and therefore the fourth coil does not operate.

In fig. 8, at the same time, the forward hall sensor three 11 in fig. 2 continues to keep in the off state, and since the forward hall sensor three 11 in fig. 2 controls the on and off states of the fifth fet 37 in fig. 4, and the forward hall sensor three 11 in fig. 2 is in the off state, the fifth fet 37 in fig. 4 is in the off state, so that no current flows through the fifth coil 5, and therefore the fifth coil does not operate.

In fig. 8, at the same time, since the rotor rotates clockwise, the S pole of the permanent magnet 16 on the rotor is away from the reverse hall sensor three 12 in fig. 2, (the reverse hall sensor three 12 is turned on when the back face faces the S pole of the permanent magnet, and is turned off when the back face of the reverse hall sensor three 12 faces the N pole of the permanent magnet and is free of a magnetic field), the reverse hall sensor three 12 in fig. 2 is turned off from the on signal state, and since the reverse hall sensor three 12 in fig. 2 controls the on and off of the sixth fet 38 in fig. 4, the sixth fet 38 in fig. 4 is also turned off from the on state. The current through the sixth coil 6 is cut off, and at the moment of power failure, the magnetic field stored in the sixth coil 6 is released in the form of electric energy, called back electromotive force, the voltage direction of which is opposite to the power supply voltage direction, and the magnetic field is released in the form of high voltage (at this time, the sixth coil 6 is equivalent to an inductor which can store electric energy in the form of magnetic field, and when it is powered on, a large amount of magnetic field is stored, and when the sixth fet 38 is switched from the on state to the off state, the sixth coil 6 is powered off, and at this time, the magnetic field generated by the sixth coil 6 does not disappear, and the magnetic field will generate back electromotive force). The voltage generated by the back electromotive force is opposite to the direction of the power voltage, and the voltage direction of the eleventh diode 30 and the twelfth diode 31 connected in parallel with the sixth coil 6 in fig. 4 is the same, and the back electromotive force is timely derived by the eleventh diode 30 and the twelfth diode 31 in fig. 4, and the rechargeable battery 32 in fig. 4 is charged and stored with the electric energy.

FIG. 9 shows the rotor rotated 120 degrees clockwise

In fig. 9, the rotor rotates 120 degrees clockwise, at the same time, the forward hall sensor one 7 and the reverse hall sensor one 8 shown in fig. 2 are facing the S pole of the permanent magnet 14 on the rotor, and at this time, the forward hall sensor one 7 in fig. 2 continues to keep the off state, because the forward hall sensor one 7 in fig. 2 controls the on and off of the first fet 33 in fig. 4, and the forward hall sensor one 7 in fig. 2 is in the off state, which results in the off state of the first fet 33 in fig. 4, the first coil 1 does not have current to pass through, and thus does not work.

In fig. 9, at the same time, when the reverse hall sensor one 8 in fig. 2 is being turned on, the turn-on signal of the reverse hall sensor one 8 is controlling the turn-on of the second fet 34 in fig. 4, the second coil 2 continues to generate the magnetic pole S toward the rotor, continues to push the S pole of the permanent magnet 14 on the rotor in the clockwise direction, and attracts the N pole of the permanent magnet 15 on the rotor next closest to the second coil 2, so that the rotor continues to rotate in the clockwise direction.

In fig. 9, at the same time, since the rotor rotates clockwise, the N pole of the permanent magnet 15 on the rotor is away from the second forward hall sensor 9 in fig. 2, (the forward hall sensor 9 is in an on state when the front face of the second forward hall sensor 9 faces the N pole of the permanent magnet, and the forward hall sensor 9 is in an off state when the front face of the second forward hall sensor faces the S pole of the permanent magnet and when no magnetic field exists), so that the second forward hall sensor 9 in fig. 2 is turned from an on signal state to an off state, and since the second forward hall sensor 9 in fig. 2 controls the on and off of the third fet 35 in fig. 4, the third fet 35 in fig. 4 is also turned from an on state to an off state. The current through the third coil 3 is cut off, and at the moment of power failure, the magnetic field stored in the third coil 3 is released in the form of electric energy, called back electromotive force, whose voltage direction is opposite to the power supply voltage direction, and is released in the form of high voltage (at this time, the third coil 3 is equivalent to an inductor, which can store electric energy in the form of magnetic field, and when it is powered on, it stores a large amount of magnetic field, and when the third fet 35 is turned from the on state to the off state, the third coil 3 is powered off, and at this time, the magnetic field generated by the third coil 3 does not disappear, and this magnetic field will generate back electromotive force). The voltage generated by the back electromotive force is opposite to the direction of the power supply voltage, and is the same as the voltage of the fifth diode 24 and the sixth diode 25 connected in parallel with the third coil 3 in fig. 4, and the back electromotive force is timely derived by the fifth diode 24 and the sixth diode 25 in fig. 4, and the rechargeable battery 32 in fig. 4 is charged and stored with the electric energy.

In fig. 9, at the same time, the second hall sensor 10 in fig. 2 continues to keep in the off state, and since the second hall sensor 10 in fig. 2 controls the fourth fet 36 in fig. 4 to be turned on and off, and the second hall sensor 10 in fig. 2 is in the off state, the fourth fet 36 in fig. 4 is in the off state, so that no current flows through the fourth coil 4, and therefore the fourth coil does not operate.

In fig. 9, at the same time, the rotor rotates 120 degrees in the clockwise direction, and at this time, the forward hall sensor three 11 and the reverse hall sensor three 12 shown in fig. 2 simultaneously face the N pole of the permanent magnet 13 on the rotor, and since the front surface of the forward hall sensor three 11 in fig. 2 faces the N pole of the permanent magnet 13 on the rotor, and the forward hall sensor three 11 in fig. 2 senses the N pole of the permanent magnet 13 on the rotor, the rotor is turned from the off state to the on state. (since the front surface of the forward hall sensor three 11 in fig. 2 faces the rotor, the permanent magnet N pole is turned on only when the forward hall sensor three is induced to the rotor, and the front surface faces the permanent magnet S pole or is turned off when no magnetic field is generated). Since the gate G of the fifth fet 37 in fig. 4 is connected to the signal line of the forward hall sensor three 11 in fig. 2, the gate G of the fifth fet 37 in fig. 4 receives the on signal of the forward hall sensor three 11 in fig. 2, and the fifth fet 37 in fig. 4 turns from the off-state to the on-state. In fig. 4, the current of the DC power supply DC + is now passed through the fifth coil 5, through the drain D and the source S of the fifth fet 37 and finally to the DC power supply DC-. Since the current passes through the fifth coil 5, the fifth coil 5 generates a magnetic pole N facing the rotor, and since the N pole of the permanent magnet 13 on the rotor in fig. 2 is opposite to the magnetic pole N generated by the fifth coil 5, but the N pole of the permanent magnet 13 on the rotor is located to the left, and the magnetic pole N generated by the fifth coil 5 is closest to the S pole of the permanent magnet 14 adjacent to the counterclockwise direction of the N pole of the permanent magnet 13 on the rotor which is opposite at that time, the magnetic pole N generated by the fifth coil 5 pushes the N pole of the permanent magnet 13 on the rotor in the clockwise direction and attracts the S pole of the permanent magnet 14 on the rotor which is closest to the fifth coil 5, so that the rotor continues to rotate in the clockwise direction. At this time, the ninth diode 28 and the twelfth diode 29 connected in parallel with the fifth coil 5 in fig. 4 are not conducted since they are opposite to the direction of the power supply voltage.

In fig. 9, at the same time, since the back surface of the three hall sensors 12 in fig. 2 faces the N pole of the permanent magnet 13 on the rotor, the three hall sensors 12 in fig. 2 are in an off state (since the back surface of the three hall sensors 12 in fig. 2 faces the rotor, the S pole of the permanent magnet on the rotor is only sensed to be on, and the back surface faces the N pole of the permanent magnet or is in an off state when no magnetic field is present). Since the third hall sensor 12 in fig. 2 controls the on/off of the sixth fet 38 in fig. 4, the third hall sensor 12 in fig. 2 is in an off state at this time, which causes the sixth fet 38 in fig. 4 to be in an off state, the sixth coil 6 has no current flowing through it and thus does not operate.

FIG. 10 shows the rotor rotating 150 degrees clockwise

In fig. 10, the rotor rotates 150 degrees clockwise, and at the same time, the first forward hall sensor 7 in fig. 2 continues to keep in the off state, because the first forward hall sensor 7 in fig. 2 controls the on/off of the first fet 33 in fig. 4, and the first forward hall sensor 7 in fig. 2 is in the off state, so that the first fet 33 in fig. 4 is in the off state, and therefore the first coil 1 does not pass current, and therefore does not work.

In fig. 10, at the same time, since the rotor rotates clockwise, the S pole of the permanent magnet 14 on the rotor is away from the first reverse hall sensor 8 in fig. 2, (the first reverse hall sensor 8 is turned on when the back surface of the first reverse hall sensor 8 faces the S pole of the permanent magnet, and is turned off when the back surface of the first reverse hall sensor 8 faces the N pole of the permanent magnet and is free of a magnetic field), so that the first reverse hall sensor 8 in fig. 2 is turned off from the on signal state, and since the first reverse hall sensor 8 in fig. 2 controls the on and off of the second fet 34 in fig. 4, the second fet 34 in fig. 4 is also turned off from the on state. The current through the second coil 2 is cut off, and at the moment of power failure, the magnetic field stored in the second coil 2 is released in the form of electric energy, called back electromotive force, the voltage direction of which is opposite to the power supply voltage direction, and the magnetic field is released in the form of high voltage (at this time, the second coil 2 is equivalent to an inductor which can store electric energy in the form of magnetic field, when it is powered on, a large amount of magnetic field is stored, when the second fet 34 is switched from the on state to the off state, the second coil 2 is powered off, and at this time, the magnetic field generated by the second coil 2 does not disappear, and the magnetic field will generate back electromotive force). The voltage generated by the back electromotive force is opposite to the direction of the power voltage, and is the same as the voltage direction of the third diode 22 and the fourth diode 23 connected in parallel to the second coil 2 in fig. 4, and the back electromotive force is timely derived by the third diode 22 and the fourth diode 23 in fig. 4, and the rechargeable battery 32 in fig. 4 is charged and stored with the electric energy.

In fig. 10, at the same time, the rotor rotates by 150 degrees in the clockwise direction, at this time, the forward hall sensor two 9 and the reverse hall sensor two 10 shown in fig. 2 simultaneously face the S pole of the permanent magnet 16 on the rotor, and since the front surface of the forward hall sensor two 9 in fig. 2 faces the S pole of the permanent magnet 16 on the rotor, the forward hall sensor two 9 in fig. 2 is in the off state (since the front surface of the forward hall sensor two 9 in fig. 2 faces the rotor, only the N pole of the permanent magnet on the rotor is sensed to be on, and the front surface faces the S pole of the permanent magnet or is in the off state when no magnetic field is present). Since the second forward hall sensor 9 in fig. 2 controls the third fet 35 in fig. 4 to turn on and off, and the second forward hall sensor 9 in fig. 2 is in an off state at this time, the third fet 35 in fig. 4 is in an off state, so that the third coil 3 has no current flowing through it and thus does not operate.

In fig. 10, at the same time, since the back surface of the second hall sensor 10 in fig. 2 faces the S pole of the permanent magnet 16 on the rotor, the second hall sensor 10 in fig. 2 senses the S pole of the permanent magnet 16 on the rotor, and thus the state is changed from the off state to the on state. (since the back of the second reverse hall sensor 10 in fig. 2 faces the rotor, the S pole of the permanent magnet on the rotor is only sensed to be turned on, and the back faces the N pole of the permanent magnet or is turned off when no magnetic field is generated). Since the gate G of the fourth fet 36 in fig. 4 is connected to the signal line of the second hall sensor 10 in fig. 2, the gate G of the fourth fet 36 in fig. 4 receives the on signal of the second hall sensor 10 in fig. 2, and the fourth fet 36 in fig. 4 turns from the off-state to the on-state. In fig. 4, the current of the DC power supply DC + is now passed through the fourth coil 4, through the drain D and the source S of the fourth fet 36 and finally to the DC power supply DC-. Since the current passes through the fourth coil 4, the fourth coil 4 generates a magnetic pole S toward the rotor, and since the S pole of the permanent magnet 16 on the rotor in fig. 2 is opposite to the magnetic pole S generated by the fourth coil 4, but the S pole of the permanent magnet 16 on the rotor is positioned to the left, and the magnetic pole S generated by the fourth coil 4 is closest to the N pole of the permanent magnet 13 adjacent to the counterclockwise direction of the S pole of the permanent magnet 16 on the rotor which is opposite at this time, the magnetic pole S generated by the fourth coil 4 pushes the S pole of the permanent magnet 16 on the rotor in the clockwise direction and attracts the N pole of the permanent magnet 13 on the rotor which is closest to the fourth coil 4, resulting in the rotor continuing to rotate in the clockwise direction. At this time, since the seventh diode 26 and the eighth diode 27 connected in parallel with the fourth coil 4 in fig. 4 are opposite to the direction of the power supply voltage, they are not conducted.

In fig. 10, the rotor rotates 150 degrees clockwise, and at the same time, the forward hall sensor three 11 and the reverse hall sensor three 12 shown in fig. 2 are facing the N pole of the permanent magnet 13 on the rotor, and at this time, the forward hall sensor three 11 in fig. 2 is turning on, the turning-on signal of the forward hall sensor three 11 is controlling the turn-on of the fifth fet 37 in fig. 4, the fifth coil 5 continues to generate the magnetic pole N toward the rotor, continues to push the N pole of the permanent magnet 13 on the rotor in the clockwise direction, and attracts the S pole of the permanent magnet 14 on the next rotor closest to the fifth coil 5, so that the rotor continues to rotate in the clockwise direction.

In fig. 10, at the same time, the reverse hall sensor three 12 in fig. 2 continues to keep in the off state, and since the reverse hall sensor three 12 in fig. 2 controls the on and off states of the sixth fet 38 in fig. 4, and the reverse hall sensor three 12 in fig. 2 is in the off state, the sixth fet 38 in fig. 4 is in the off state, so that no current flows through the sixth coil 6, and therefore the sixth coil does not operate.

FIG. 11 shows the rotor rotated 180 degrees clockwise

In fig. 11, the rotor rotates 180 degrees with the clockwise, and the magnetic pole position of the permanent magnet on the rotor this moment is the same with the position of the rotor of fig. 5 with clockwise rotation 0 degree, rotating magnetic field and the utility model discloses the drive step of motor begins to repeat next 180 degrees, and so circulation is repeated, leads to the motor to last rotatory, and when the motor lasted rotatory, first coil 1, second coil 2, third coil 3, fourth coil 4, fifth coil 5 and sixth coil 6 were incessantly switched on and off the power, and its counter electromotive force energy of retrieving is considerable.

The utility model discloses brushless permanent-magnet machine of direct current's three stator core is put on average according to 120 degrees, is more steady for the driving motor is rotatory, and three stator core of group have a set of stator core to just begin the drive forever in the middle of the motor operation's relation, have a set of stator core in the middle of the drive, have a set of stator core to just finish the drive.

The utility model discloses each stator coil of direct current permanent magnet brushless motor is independent operation, the utility model discloses show 6 most basic stator coils in the diagram, the syntropy is two-wire respectively and around on three stator core, even have wherein a set of or two sets of stator coil out of work because of the trouble, the motor also can continue the operation, can not therefore stall, this has ensured to some extent on the security.

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

1. A motor for recovering back electromotive force in operation comprises a motor main body and a driving circuit, wherein the motor main body comprises a rotor fixedly sleeved on a rotating shaft, a stator is sleeved on the outer periphery of the rotor, at least three groups of stator winding coils are centrally and symmetrically distributed on the inner periphery of the stator, and the motor is characterized in that the stator winding coils are provided with a first coil and a second coil, a forward Hall sensor and a reverse Hall sensor which are matched in groups are arranged between the adjacent stator winding coils, at least four permanent magnets are fixedly arranged on the rotor, a plurality of permanent magnets are uniformly distributed on the outer periphery of the rotor to form a centrally symmetrical structure, and N poles and S poles of the adjacent permanent magnets are arranged in a staggered manner;

2. The motor for recovering a counter electromotive force in operation as claimed in claim 1, wherein the number of said stator winding coils is three, and adjacent said stator winding coils are uniformly arranged with an angle of 120 °; the number of the permanent magnets is four, and the adjacent permanent magnets are uniformly distributed with an included angle of 90 degrees.

3. A motor for recovering back emf during operation as set forth in claim 1 wherein said stator winding coil has a stator core and said first and second coils are bifilar and are wound about said stator core.

4. The motor for recovering a back electromotive force in operation as claimed in claim 1, wherein the forward hall sensor is located above with its front surface facing the rotor, and the reverse hall sensor is located below with its back surface facing the rotor.

5. The motor for recovering a counter electromotive force in operation as claimed in claim 1, wherein a direct current power source for driving the motor main body to rotate is directly connected between the direct current power source line DC + and the direct current power source line DC-.

6. The motor for recovering a back electromotive force during operation as claimed in claim 1, wherein a DC governor for adjusting a speed of the motor main body is connected between the DC power line DC + and the DC power line DC-, and then a DC power source for driving the motor main body to rotate is connected.