CN217146282U

CN217146282U - Motor data acquisition control device and electric power-assisted bicycle

Info

Publication number: CN217146282U
Application number: CN202220212239.5U
Authority: CN
Inventors: 胡翔; 孙敏
Original assignee: Nanjing Dmhc Science&technology Co ltd
Current assignee: Nanjing Dmhc Science&technology Co ltd
Priority date: 2022-01-25
Filing date: 2022-01-25
Publication date: 2022-08-09
Anticipated expiration: 2032-01-25

Abstract

The utility model provides a motor data acquisition controlling means and electric power assisted bicycle relates to motor control technical field. The motor data acquisition control device includes: the device comprises a position acquisition unit, annular magnetic steel, a speed acquisition unit, speed measurement magnetic steel, a temperature acquisition unit and a controller; the position acquisition unit is electrically connected with the controller and is used for generating position signals of a three-phase winding of the motor and transmitting the position signals to the controller; the speed acquisition unit is used for generating a speed signal of the motor; the temperature acquisition unit is used for generating a temperature signal of the motor; the controller is used for determining the state of the motor and controlling the motor to rotate according to the position signal, the speed signal and the temperature signal. The motor data acquisition control device can acquire position signals, temperature signals and speed signals of the three-phase winding when the motor works, determine the state of the motor according to the position signals, the temperature signals and the speed signals, and control the rotation of the motor.

Description

Motor data acquisition control device and electric power-assisted bicycle

Technical Field

The utility model relates to a motor control technical field particularly, relates to a motor data acquisition controlling means and electric power assisted bicycle.

Background

The electric power-assisted bicycle is a novel vehicle which is added with a driving system on the basis of the bicycle, can give auxiliary power when a person rides or pushes, and realizes the integration of manual riding and motor boosting. Among the actuating system of electric bicycle, mainly include: the motor, the battery, the sensor, the controller and the like. For the motor of the electric power-assisted bicycle, the parameters required to be acquired during the operation of the motor comprise: the position signal of the three-phase winding of the motor, the speed signal of the motor and the temperature signal of the motor, so that the real-time working state of the motor can be mastered and adjusted.

In the prior art, the above parameters of the motor during operation are generally obtained by means of an external sensor or a separate monitoring device.

However, in the prior art, the cost of the external sensor or the single monitoring device is high, and the monitoring of the motor parameters is not comprehensive and real-time enough.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a motor data acquisition controlling means and electric power assisted bicycle can gather the position signal, temperature signal and the speed signal of the three-phase winding of motor during operation to confirm the state of motor in view of the above, and the rotation of control motor.

The embodiment of the utility model discloses a can realize like this:

in a first aspect, the utility model provides a motor data acquisition controlling means, include: the device comprises a position acquisition unit, annular magnetic steel, a speed acquisition unit, speed measurement magnetic steel, a temperature acquisition unit and a controller;

the position acquisition unit is arranged at a first stator position of a stator of the motor, is electrically connected with the controller and is used for generating position signals of a three-phase winding of the motor and transmitting the position signals to the controller;

the annular magnetic steel is annularly arranged at a first rotor position of a rotor of the motor and is used for triggering the position acquisition unit to generate the position signal;

the speed acquisition unit is arranged at a second stator position of the stator of the motor, is respectively and electrically connected with the controller and the temperature acquisition unit, and is used for generating a speed signal of the motor and transmitting the speed signal to the controller;

the speed measuring magnetic steel is circumferentially arranged at a second rotor position of the rotor of the motor and used for triggering the speed acquisition unit to generate the speed signal;

the temperature acquisition unit is electrically connected with the controller and is used for generating a temperature signal of the motor;

the controller is used for determining the state of the motor and controlling the motor to rotate according to the position signal, the speed signal and the temperature signal.

In an alternative embodiment, the velocity acquisition unit comprises: the speed Hall device and the first triode;

the speed Hall device is electrically connected with the first end of the first triode;

the second end of the first triode is electrically connected with the temperature acquisition unit and the controller, and the third end of the first triode is grounded.

In an alternative embodiment, the position acquisition unit comprises:

the sensor comprises a first position Hall sensor, a second position Hall sensor and a third position Hall sensor;

the first position Hall sensor comprises a first position Hall device and a second triode;

the first end of the second triode is connected with the first position Hall device;

the second position Hall sensor comprises a second position Hall device and a third triode;

the first end of the third triode is connected with the second position Hall device;

the third position Hall sensor comprises a third position Hall device and a fourth triode;

the first end of the fourth triode is connected with the third position Hall device;

second ends of the second triode, the third triode and the fourth triode are respectively connected with the controller;

and the third ends of the second triode, the third triode and the fourth triode are respectively grounded.

In an alternative embodiment, the temperature acquisition unit comprises: a thermistor;

the first end of the thermistor is electrically connected with the speed acquisition unit and the controller respectively;

the second end of the thermistor is grounded.

In an alternative embodiment, the controller comprises: the system comprises a position signal processing unit, a speed and temperature processing unit and a micro control unit;

the position signal processing unit is electrically connected with the position acquisition unit and is used for processing the position signal;

the speed and temperature processing unit is electrically connected with the speed acquisition unit and the temperature acquisition unit respectively and is used for carrying out signal processing on the position signal and the temperature signal;

the micro control unit is electrically connected with the position signal processing unit and the position acquisition unit respectively.

In an alternative embodiment, the speed and temperature processing unit comprises: the first high-frequency filtering unit, the first conversion unit and the first low-frequency filtering unit;

the first high frequency filtering unit includes: a first magnetic bead and a first capacitor;

the first end of the first magnetic bead is connected with the temperature acquisition unit and the speed acquisition unit, and the second end of the first magnetic bead is connected with the first capacitor and the first conversion unit;

the first end of the first capacitor is connected with the first conversion unit, and the second end of the first capacitor is grounded;

the first conversion unit includes: a first resistor;

the first end of the first resistor is connected with the first high-frequency filtering unit and the first low-frequency filtering unit, and the second end of the first resistor is connected with the external power supply;

the first low frequency filtering unit includes: a second resistor and a second capacitor;

a first end of the second resistor is connected with the first conversion unit, and a second end of the second resistor is connected with the second capacitor;

and the second end of the second capacitor is grounded.

In an alternative embodiment, the position signal processing unit includes: the second high-frequency filtering unit, the second conversion unit and the second low-frequency filtering unit;

the second high frequency filtering unit includes: a second magnetic bead and a third capacitor;

a first end of the second magnetic bead is connected with the position acquisition unit, and a second end of the second magnetic bead is connected with the third capacitor and the second conversion unit;

the first end of the third capacitor is connected with the second conversion unit, and the second end of the third capacitor is grounded;

the second conversion unit includes: a third resistor;

the first end of the third resistor is connected with the second high-frequency filtering unit and the second low-frequency filtering unit, and the second end of the third resistor is connected with the external power supply;

the second low frequency filtering unit includes: a fourth resistor and a fourth capacitor;

a first end of the fourth resistor is connected with the second conversion unit, and a second end of the fourth resistor is connected with the fourth capacitor;

and the second end of the fourth capacitor is grounded.

In an optional embodiment, the position signal processing unit further includes: the third high-frequency filtering unit, the third conversion unit and the third low-frequency filtering unit;

the third high frequency filtering unit includes: a third magnetic bead and a fifth capacitor;

a first end of the third magnetic bead is connected with the position acquisition unit, and a second end of the third magnetic bead is connected with the fifth capacitor and the third conversion unit;

a first end of the fifth capacitor is connected with the third conversion unit, and a second end of the fifth capacitor is grounded;

the third conversion unit includes: a fifth resistor;

a first end of the fifth resistor is connected with the third high-frequency filtering unit and the third low-frequency filtering unit, and a second end of the fifth resistor is connected with the external power supply;

the third low frequency filtering unit includes: a sixth resistor and a sixth capacitor;

a first end of the sixth resistor is connected with the third conversion unit, and a second end of the sixth resistor is connected with the sixth capacitor;

and the second end of the sixth capacitor is grounded.

In an optional embodiment, the position signal processing unit further includes: the fourth high-frequency filtering unit, the fourth conversion unit and the fourth low-frequency filtering unit;

the fourth high frequency filtering unit includes: a fourth magnetic bead and a seventh capacitor;

a first end of the fourth magnetic bead is connected with the position acquisition unit, and a second end of the fourth magnetic bead is connected with the seventh capacitor and the fourth conversion unit;

a first end of the seventh capacitor is connected with the fourth conversion unit, and a second end of the seventh capacitor is grounded;

the fourth conversion unit includes: a seventh resistor;

a first end of the seventh resistor is connected with the fourth high-frequency filtering unit and the fourth low-frequency filtering unit, and a second end of the seventh resistor is connected with the external power supply;

the fourth low frequency filtering unit includes: an eighth resistor and an eighth capacitor;

a first end of the eighth resistor is connected with the fourth conversion unit, and a second end of the eighth resistor is connected with the eighth capacitor;

and the second end of the eighth capacitor is grounded.

In a second aspect, the present invention provides an electric power assisted bicycle, the electric power assisted bicycle includes: the motor data acquisition control device and the motor in any one of the preceding embodiments, the motor data acquisition control device is configured to acquire a position signal, a speed signal, and a temperature signal of the motor, and determine a state of the motor and control the motor to rotate according to the position signal, the speed signal, and the temperature signal.

The utility model provides a motor data acquisition control device and electric power assisted bicycle's beneficial effect is:

first, the utility model discloses a position acquisition unit, speed acquisition unit and the temperature acquisition unit of setting on the motor, and need not to increase extra sensor or solitary monitoring facilities to every signal and gather, just can obtain the position signal, temperature signal and the speed signal of the three-phase winding of motor during operation simultaneously, when having reduced the collection cost of above-mentioned signal, also improved the real-time of gathering the signal. Secondly, through setting up annular magnet steel and the combined action of position acquisition unit on the rotor of motor, the speed measurement magnet steel and the combined action of speed acquisition unit of setting on the rotor of motor trigger respectively and have produced position signal and speed signal, can mutually support through less components and parts, just reach the purpose of gathering above-mentioned signal, when having reduced signal acquisition's cost, also reduced the wiring between the components and parts.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural diagram of a motor data acquisition control device provided in an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a motor data acquisition control device according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a motor data acquisition control device according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a motor data acquisition control device according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a motor data acquisition control device according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a motor data acquisition control device according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a motor data acquisition control device according to an embodiment of the present invention;

fig. 8 is a schematic structural view of an electric power assisted bicycle according to an embodiment of the present invention.

Icon: 10-motor data acquisition control device; 101-a position acquisition unit; 1011-a first position hall sensor; 1011 a-first position hall device; 1011 b-a second triode; 1012-second position hall sensor; 1012 a-second position hall device; 1012 b-third triode; 1013-a third position hall sensor; 1013 a-a third position hall device; 1013 b-a fourth triode; 102-annular magnetic steel; 103-speed acquisition unit; 1031-speed hall device; 1032-a first triode; 104-speed measuring magnetic steel; 105-a temperature acquisition unit; 1051-a thermistor; 106-a controller; 1061-position signal processing unit; 1061 a-a second high frequency filtering unit; 1061b — a second conversion unit; 1061c — a second low frequency filtering unit; 1061 d-a third high frequency filtering unit; 1061e — a third conversion unit; 1061 f-a third low frequency filtering unit; 1061 h-a fourth high-frequency filtering unit; 1061 i-a fourth conversion unit; 1061 g-a fourth low-frequency filtering unit; 1062-speed and temperature processing unit; 1062 a-a first high frequency filtering unit; 1062b — a first conversion unit; 1062c — a first low frequency filtering unit; 1063-a micro control unit; 20-motor.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, or orientations or positional relationships that are conventionally placed when the products of the present invention are used, or orientations or positional relationships that are conventionally understood by those skilled in the art, and are merely for convenience of description of the present invention and for simplicity of description, and do not indicate or imply that the equipment or components that are referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In order to control and master the real-time working state of the motor in the electric power bicycle, the position signal of the three-phase winding of the motor, the speed signal of the motor and the temperature signal of the motor need to be collected and analyzed in real time.

In the prior art, there is no collection scheme that can simultaneously and real-timely acquire the plurality of signals, and one of the position signal, the speed signal and the temperature signal is collected respectively and then collected to the controller in a mode of an external sensor or a mode of separately providing a monitoring device. The motor data acquisition mode has the advantages of higher cost and larger volume, and can easily cause insufficient comprehensive and real-time monitoring of motor parameters.

Based on this, through research, the applicant provides a motor data acquisition control device and an electric power assisted bicycle, through a position acquisition unit, a speed acquisition unit and a temperature acquisition unit which are arranged on a motor, and without adding an additional sensor or an independent monitoring device to each signal for acquisition, position signals, temperature signals and speed signals of a three-phase winding when the motor works can be obtained simultaneously, and accordingly, the state of the motor is determined, and the rotation of the motor is controlled.

Fig. 1 is the embodiment of the utility model provides a motor data acquisition controlling means's that provides structural schematic diagram, as shown in fig. 1, this motor data acquisition controlling means includes: position acquisition unit 101, annular magnet steel 102, speed acquisition unit 103, speed measurement magnet steel 104, temperature acquisition unit 105 and controller 106.

The position acquisition unit 101 is disposed at a first stator position of the stator of the motor 20, and the position acquisition unit 101 is electrically connected to the controller 106, and is configured to generate a position signal of a three-phase winding of the motor 20 and transmit the position signal to the controller 106.

The annular magnetic steel 102 is annularly disposed at a first rotor position of the rotor of the motor 20, and the annular magnetic steel 102 is used for triggering the position acquisition unit 101 to generate a position signal.

Alternatively, there may be a plurality of annular magnetic steels 102, each of which includes N poles and S poles, and the plurality of magnetic steels may be uniformly arranged on the first rotor position of the rotor in an annular manner, where the first rotor position may be on a three-phase winding on the rotor that surrounds the motor 20. The position pickup unit 101 is disposed at a first stator position of the stator of the motor 20, which may be a certain position on the winding of the stator of the motor 20. Wherein the first rotor position corresponds to the first stator position, and the first rotor position and the first stator position may be on the same cross-sectional plane of the motor 20.

When the motor 20 is powered on to work, the three-phase winding of the motor 20 generates a magnetic field to drive the rotor to rotate, and the annular magnetic steel 102 is also driven to rotate. When the annular magnetic steel 102 passes through the position acquisition unit 101 in sequence, the position acquisition unit 101 on the stator can be triggered to generate levels in different states, so that a position signal capable of indicating the position of the three-phase winding of the motor 20 is obtained, and the position signal is sent to the controller 106. Wherein the position of the three-phase winding may be an angle of rotation of a plurality of rotors of the motor 20.

The speed acquisition unit 103 is disposed at a second stator position of the stator of the motor 20, and the speed acquisition unit 103 is electrically connected to the controller 106 and the temperature acquisition unit 105, respectively, and is configured to generate a speed signal of the motor 20 and transmit the speed signal to the controller 106.

The speed measurement magnetic steel 104 is circumferentially disposed at a second rotor position of the rotor of the motor 20, and is configured to trigger the speed acquisition unit 103 to generate a speed signal.

The number of speed measuring magnetic steel 104 can also be a plurality of, and every magnetic steel contains the N utmost point and the S utmost point, and specific quantity can set up according to the inside space size of motor 20. The tachometer magnet steel 104 may be circumferentially and uniformly disposed at a second rotor position of the rotor of the motor 20, and the distance between the tachometer magnet steel and the rotor is equal, for example, the tachometer magnet steel may be disposed on a hub of a hub motor and a core power output structure of a center motor. The speed acquisition unit 103 may be arranged at a second stator position on the stator of the motor 20, which may be a certain position on the windings of the stator of the motor 20. Wherein the second rotor position corresponds to the second stator position, and the second rotor position may be, for example, on the same cross-sectional plane of the motor 20 as the second stator position.

It should be noted that, in order to avoid the mutual influence of the magnetic steels, the first rotor position and the second rotor position represent different positions. For example, the first rotor position and the second rotor position may be separated by a distance. Likewise, the corresponding first stator position and second stator position also represent different positions.

Optionally, when the speed measurement magnetic steel 104 sequentially passes through the speed acquisition unit 103, the level inside the speed acquisition unit 103 changes, and the speed measurement period t is determined according to the number of times of the level change. Then, the time T taken by the motor 20 to rotate for one turn can be determined according to the number of turns of the motor 20 in each speed measuring period T, that is, the number of the speed measuring magnetic steels 104, and the rotating speed signal of the motor 20 is obtained. Finally, the speed acquisition unit 103 sends a rotation speed signal of the motor 20 to the controller 106.

The temperature acquisition unit 105 is electrically connected to the controller 106, and the temperature acquisition unit 105 is used for generating a temperature signal of the motor 20.

The temperature acquisition unit 105 can change its own state, for example, resistance value, according to the temperature of the motor 20, so as to obtain a temperature signal of the motor 20 and send the temperature signal to the controller 106.

The controller 106 is configured to determine a status of the motor 20 and control the motor 20 to rotate based on the position signal, the speed signal, and the temperature signal.

After receiving the position signal, the speed signal, and the temperature signal, the controller 106 may apply different voltages to each of the three-phase windings of the motor 20 according to the different positions of the three-phase windings of the motor 20 reflected by the position signal, so as to drive the rotor of the motor 20 to rotate.

Optionally, the controller 106 may also adjust the state of the motor 20 according to the received speed signal and temperature signal, according to the current working scenario, or warn in time when the speed or temperature of the motor 20 exceeds a threshold.

In addition, a Printed circuit board (PCB for short) can be arranged on the stator, the temperature acquisition unit is arranged on the PCB, the output ends of the position acquisition unit and the speed acquisition unit can be connected with the PCB, and the PCB is directly connected with the controller, so that the number of wiring is reduced.

In this embodiment, through position acquisition unit, speed acquisition unit and the temperature acquisition unit of setting on the motor, and need not to increase extra sensor or solitary monitoring facilities to every signal and gather, just can obtain the position signal, the temperature signal and the speed signal of three-phase winding of motor during operation simultaneously, when having reduced the collection cost of above-mentioned signal, also improved the real-time of gathering the signal. The speed signal and the position signal can be generated by triggering through the speed measuring magnetic steel and the annular magnetic steel, so that the cost and the volume of signal acquisition are reduced, and meanwhile, the wiring among components is also reduced.

Alternatively, as shown in fig. 2, the speed acquisition unit 103 includes: a speed hall device 1031, and a first transistor 1032.

Wherein the speed hall device 1031 is electrically connected to a first terminal of the first transistor 1032.

A second terminal of the first transistor 1032 is electrically connected to the temperature acquisition unit 105 and the controller 106, and a third terminal of the first transistor 1032 is grounded.

The tachometer magnet steel 104 disposed on the rotor rotates with the rotor, and when the N pole of a certain magnet steel passes through the speed acquisition unit 103, the speed hall device 1031 of the speed acquisition unit 103 generates a high level, so that the base of the first triode 1032, that is, the first end, is the high level, and the first triode 1032 enters a conducting state. At this time, since the emitter output signal of the first transistor 1032 is grounded, the collector, i.e., the second terminal of the first transistor 1032 outputs a low level, i.e., the speed signal, to the controller 106.

After the N pole of the magnetic steel rotates through the speed acquisition unit 103, because there is no influence of the magnetic field, the speed hall device 1031 of the speed acquisition unit 103 generates a low level, so that the base, i.e., the first end, of the first triode 1032 is at a low level, and the first triode 1032 enters a cut-off state. At this time, the collector of the first transistor 1032 does not have a voltage output, and the temperature collecting unit 105 outputs a temperature signal to the controller 106, where the temperature signal is a non-low level signal.

Alternatively, it may be noted that when the controller 106 receives a low level signal, it is recorded that the speed acquisition unit 103 is in the first state, and when the controller 106 receives a non-low level signal, it is recorded that the speed acquisition unit 103 is in the second state. When the speed acquisition unit 103 is switched from the first state to the second state, or from the second state to the first state, it may be considered to be a state switching. For example, the controller 106 may set the time for the speed acquisition unit 103 to switch the states three times to be one speed measurement period t, and when the speed measurement magnetic steel 104 includes n magnetic steels arranged along the circumferential direction of the rotor of the motor, the motor rotates for one speed measurement period t, that is, the motor rotates for 1/n of a turn. Therefore, the time T taken by the motor to rotate for one circle can be calculated according to the formula T-n-T, and the rotating speed of the motor can be further calculated.

In this embodiment, the speed signal of the motor is collected and calculated by the characteristics of the speed hall device, the first triode and the speed measurement magnetic steel of the speed collecting unit. The speed acquisition process is simplified, and the accuracy of the acquisition result is improved.

Optionally, as shown in fig. 3, the position acquisition unit includes: a first position hall sensor 1011, a second position hall sensor 1012, and a third position hall sensor 1013.

For example, the relative positions of the position acquisition unit 101 and the annular magnetic steel 102 may be set as the structure shown in fig. 3, wherein the first position hall sensor 1011, the second position hall sensor 1012, and the third position hall sensor 1013 may be disposed on different windings of the stator of the motor, near the position of the annular magnetic steel 102. Annular magnet steel 102 includes a plurality of magnet steels therein, and every magnet steel includes the N utmost point and the S utmost point, and among a plurality of magnet steels, adjacent magnet steel can the magnetic pole alternately, evenly the annular set on the first rotor position of the rotor of motor, and encircle and set up around three-phase winding, form annular, rotatable magnet steel. The plurality of position hall sensors of the position acquisition unit 101 correspond to the plurality of magnetic steels of the annular magnetic steel, and may be disposed in the same cross section of the motor, for example.

As shown in fig. 4, the first position hall sensor 1011 includes a first position hall device 1011a and a second transistor 1011 b. A first terminal of the second transistor 1011b is connected to the first position hall device 1011 a.

The second position hall sensor 1012 includes a second position hall device 1012a and a third transistor 1012b, and a first terminal of the third transistor 1012b is connected to the second position hall device 1012 a.

The third hall sensor 1013 includes a third hall device 1013a and a fourth transistor 1013b, and a first end of the fourth transistor 1013b is connected to the third hall device 1013 a.

Second ends of the second transistor 1011b, the third transistor 1012b and the fourth transistor 1013b are connected to the controller, respectively.

The third terminals of the second transistor 1011b, the third transistor 1012b and the fourth transistor 1013b are grounded, respectively.

Next, taking the first position hall sensor 1011 as an example, a process of acquiring position signals of three-phase windings of the motor will be described. When the N pole of a certain magnetic steel in the annular magnetic steel passes through the first position hall device 1011a of the first position hall sensor 1011, the first position hall device 1011a generates a high level, so that the second triode 1011b is conducted, and the collector output of the second triode 1011b is a low level. When the S pole of a certain magnetic steel in the annular magnetic steel passes through the first position hall device 1011a of the first position hall sensor 1011, the first position hall device 1011a generates a low level, so that the second triode 1011b is cut off, and the collector of the second triode 1011b outputs a high level at this time under the action of the processing circuit in the controller 106, and the low level signal or the high level signal is the position signal output by the first position hall sensor 1011.

The process of generating the position signals by the second position hall sensor 1012 and the third position hall sensor 1013 is the same as the process of generating the position signals by the first position hall sensor 1011, and the details are not repeated herein.

Next, due to the alternate transformation of the adjacent magnetic steels of the annular magnetic steel, the position signal Ha output by the first position hall sensor 1011, the position signal Hb output by the second position hall sensor 1012, and the position signal Hc output by the third position hall sensor 1013 provided on the winding of the motor stator, and the combined position signal HaHbHc has 6 position states: 010. 100, 001, 011, 110, 101. When the position status is 000 or 111, the position status is invalid. Where 0 represents a low level signal and 1 represents a high level signal.

The controller 106, according to the above 6 position states in the received position signals, applies different voltages to the three-phase windings of the motor, that is, the group a where the first position hall sensor 1011 is located, the group B where the second position hall sensor 1012 is located, and the group C where the third position hall sensor 1013 is located, by controlling the three-phase bridge arm driving circuit in real time, so as to drive the rotor of the motor to rotate. Alternatively, the relationship between the first position hall sensor 1011, the second position hall sensor 1012, and the third position hall sensor 1013 and the phase sequence in which the controller 106 energizes the respective windings may be as shown in the following table.

TABLE 1 relationship of position signals to phase sequence of controller energizing each winding

In this embodiment, the controller 106 drives the motor through a three-phase bridge arm driving circuit. The three-phase bridge arm driving circuit comprises 3 upper half bridge arms and 3 lower half bridge arms corresponding to 3 windings, namely an upper half bridge arm A, an upper half bridge arm B, an upper half bridge arm C, a lower half bridge arm A, a lower half bridge arm B and a lower half bridge arm C. The controller 106 can control one of the upper half bridge arm and the other lower half bridge arm to be conducted according to the 6 position states of the position signals. For example, when the position state is 001, the winding C is positive, and the winding B is negative, the upper half-bridge arm C and the lower half-bridge arm B can be controlled to be on. Alternatively, the relationship between the state of each of the upper half bridge arm and the lower half bridge arm and the energization phase sequence of the windings may be as shown in the following table.

TABLE 2 relationship table of states of each of upper half arm and lower half arm and energization phase sequence of windings

Three-phase bridge arm driving circuit	Winding A	Winding B	Winding C
				Upper half bridge arm A	Is just	/	/
Lower half bridge arm A	Negative pole	/	/
				Upper half bridge arm B	/	Is just for	/
Lower half bridge arm B	/	Negative pole	/
				Upper half bridge arm C	/	/	Is just
Lower half-bridge arm C	/	/	Negative pole

In this embodiment, the first position hall sensor, the second position hall sensor, and the third position hall sensor are matched with the annular magnetic steel to generate corresponding position signals, and the controller can control the energization state of the three-phase winding of the motor in real time through the three-phase bridge arm driving circuit according to the position signals. The accuracy and the real-time performance of position detection are improved, and the reliability of the device is further improved.

Optionally, as shown in fig. 5, the temperature acquisition unit includes: a thermistor 1051.

The first end of the thermistor 1051 is electrically connected to the speed acquisition unit 103 and the controller 106, and the second end of the thermistor 1051 is grounded.

The thermistor 1051 is a sensitive element whose resistance value changes with temperature, and the change may be that the resistance value increases with the temperature or that the resistance value decreases with the temperature, and the specific type of the thermistor 1051 is not limited herein.

The thermistor 1051 can be disposed on the PCB board in the above embodiments, and has a first end connected to the speed acquisition unit 103 via a common output signal interface and a second end connected to ground to output a temperature signal to the controller 106.

Due to the characteristic that the thermistor 1051 has different resistance values at different temperatures, the thermistor 1051 and the processing circuit in the controller 106 can divide the voltage to output a corresponding voltage, i.e., a temperature signal, which can reflect the temperature of the motor.

Finally, the controller 106 may calculate the current temperature of the motor 20 by a table lookup method according to the temperature characteristic of the thermistor 1051 and the voltage value of the output temperature signal.

In the embodiment, the controller can directly obtain the real-time temperature of the motor through the voltage through the characteristic of the thermistor, the obtained temperature is collected, a temperature sensor is not needed, and the size of the temperature collection part of the device is reduced.

Optionally, with continued reference to fig. 5, the controller 106 includes: a position signal processing unit 1061, a speed and temperature processing unit 1062, and a micro control unit 1063.

The position signal processing unit 1061 is electrically connected to the position acquisition unit 101, and the position signal processing unit 1061 is configured to perform signal processing on the position signal.

The position signal processing unit 1061 receives the position signal HaHbHc acquired by the position acquisition unit 101, and then processes the position signal, for example, by filtering to remove noise in the position signal. Then, the processed 3-way position signals are respectively sent to corresponding pins of the micro control unit 1063.

The speed and temperature processing unit 1062 is electrically connected to the speed acquisition unit 103 and the temperature acquisition unit, respectively, and the speed and temperature processing unit 1062 is configured to perform signal processing on the position signal and the temperature signal.

The speed signal generated by the speed acquisition unit 103 and the temperature signal generated by the temperature acquisition unit are processed by the speed and temperature processing unit 1062, for example, noise in the speed signal and the temperature signal is filtered. And then, respectively sending the processed speed signal and the processed temperature signal to corresponding pins of a micro control unit.

Alternatively, in order to further reduce the wiring, the position signal processing unit 1061, the speed and temperature processing unit 1062 may be integrated on the PCB together with the thermistor 1051 of the temperature collecting unit.

The micro control unit 1063 is electrically connected to the position signal processing unit 1061 and the position acquisition unit 1062, respectively.

After receiving the processed position signal, speed signal, and temperature signal through the corresponding pins, the Micro Control Unit 1063(Micro Control Unit, abbreviated as MCU) may energize the motor according to the position signal, thereby controlling the rotation of the motor 20. The state of the motor 20 can be known according to the speed signal and the temperature signal, and whether the motor is in a normal working state can be judged according to the state.

In this embodiment, the position signal processing unit, the speed signal processing unit, and the temperature signal processing unit in the controller process the acquired position signal, speed signal, and temperature signal, so as to reduce noise in the signal and improve accuracy of the acquisition result.

Optionally, as shown in fig. 6, the speed and temperature processing unit 1062 includes: a first high frequency filtering unit 1062a, a first converting unit 1062b, and a first low frequency filtering unit 1062 c.

The first high-frequency filtering unit 1062a includes: a first magnetic bead FB1 and a first capacitance C1.

A first end of the first magnetic bead FB1 is connected to the temperature acquisition unit 105 and the speed acquisition unit 103, and a second end of the first magnetic bead FB1 is connected to the first capacitor C1 and the first conversion unit 1062 b. A first terminal of the first capacitor C1 is connected to the first switching unit 1062b, and a second terminal of the first capacitor C1 is grounded.

The first magnetic bead FB1 and the first capacitor C1 in the first high-frequency filtering unit 1062a together play a role of filtering out high-frequency interference signals in the speed signal and the temperature signal.

The first conversion unit 1062b includes: a first resistor R1.

A first end of the first resistor R1 is connected to the first high frequency filter unit 1062a and the first low frequency filter unit 1062c, and a second end of the first resistor R1 is connected to the external power VCC.

In the above embodiment, the collector of the first transistor 1032 of the speed collecting unit 103 is open-circuited for output, and the first resistor R1 is a pull-up resistor, and is connected to the external power VCC to convert the resistance change of the speed hall device 1031 in the speed collecting unit 103 into a voltage signal. Wherein, the external power VCC can be 5V.

The first resistor R1 may also form a voltage divider with the thermistor 1051 of the temperature acquisition unit 105, so that the temperature acquisition unit 105 outputs a temperature signal.

The first low frequency filtering unit 1062c includes: a second resistor R2 and a second capacitor C2.

A first terminal of the second resistor R2 is connected to the first switching unit 1062b, and a second terminal of the second resistor R2 is connected to the second capacitor C2. The second terminal of the second capacitor C2 is connected to ground.

The first low-frequency filter unit 1062C forms a low-pass filter through the second resistor R2 and the second capacitor C2, and further filters low-frequency noise in the speed signal and the temperature signal.

In this embodiment, through filtering the noise in speed signal and the temperature signal, provide the partial pressure for temperature acquisition unit's thermistor simultaneously, improved the accuracy of collection result, avoided the influence of noise to the collection result.

Alternatively, as shown in fig. 7, the position signal processing unit 1061 includes: a second high frequency filtering unit 1061a, a second converting unit 1061b, and a second low frequency filtering unit 1061 c.

The second high-frequency filtering unit 1061a includes: a second bead FB2 and a third capacitance C3.

A first end of the second magnetic bead FB2 is connected to the position collecting unit 101, and a second end of the second magnetic bead FB2 is connected to the third capacitor C3 and the second converting unit 1061 b. A first terminal of the third capacitor C3 is connected to the second switching unit 1061b, and a second terminal of the third capacitor C3 is grounded.

The second magnetic bead FB2 and the third capacitor C3 in the second high-frequency filter unit 1061a together play a role of filtering out high-frequency interference signals in the position signal output by the first position hall sensor 1011.

The second conversion unit 1061b includes: and a third resistor R3.

A first end of the third resistor R3 is connected to the second high frequency filter unit 1061a and the second low frequency filter unit 1061c, and a second end of the third resistor R3 is connected to the external power VCC.

The third resistor R3 is a pull-up resistor, and converts a change in the resistance of the first position hall device 1011a in the first position hall sensor 1011 into a voltage signal. When the N pole of a certain magnetic steel of the annular magnetic steel passes through the first position hall device 1011a, the first position hall device 1011a generates a high level to turn on the second triode 1011b, and the collector output voltage of the second triode 1011b is a low level position signal. When the S pole of a certain magnetic steel of the annular magnetic steel passes through the first position hall device 1011a, the first position hall device 1011a does not generate a high level, the second triode 1011b is not conducted, and the second end of the third resistor R3 is connected with the external power VCC, so that the collector output voltage of the second triode 1011b is a position signal of the high level. Wherein, the external power VCC may be 5V.

The second low frequency filtering unit 1061c includes: a fourth resistor R4 and a fourth capacitor C4.

A first end of the fourth resistor R4 is connected to the second converting unit 1061b, and a second end of the fourth resistor R4 is connected to the fourth capacitor C4. The second terminal of the fourth capacitor C4 is connected to ground.

The second low-frequency filter unit 1061C forms a low-pass filter through the fourth resistor R4 and the fourth capacitor C4, and further filters low-frequency noise in the position signal output by the first position hall sensor 1011.

With continued reference to fig. 7, the position signal processing unit 1061 further includes: a third high frequency filtering unit 1061d, a third converting unit 1061e, and a third low frequency filtering unit 1061 f.

The third high frequency filtering unit 1061d includes: a third magnetic bead FB3 and a fifth capacitance C5.

A first end of the third magnetic bead FB3 is connected to the position collecting unit 101, and a second end of the third magnetic bead FB3 is connected to the fifth capacitor C5 and the third converting unit 1061 e. A first terminal of the fifth capacitor C5 is connected to the third switching unit 1061e, and a second terminal of the fifth capacitor C5 is grounded.

The third magnetic bead FB3 and the fifth capacitor C3 in the third high frequency filter unit 1061d together play a role of filtering out high frequency interference signals in the position signal output by the second position hall sensor 1012.

The third conversion unit 1061e includes: and a fifth resistor R5.

A first end of the fifth resistor R5 is connected to the third high frequency filter unit 1061d and the third low frequency filter unit 1061f, and a second end of the fifth resistor R5 is connected to the external power VCC.

The fifth resistor R5 is a pull-up resistor that converts the change in resistance of the second position hall device 1012a in the second position hall sensor 1012 into a voltage signal. When the N pole of a certain magnetic steel of the annular magnetic steel passes through the second position hall device 1012a, the second position hall device 1012a generates a high level to turn on the third triode 1012b, and the collector output voltage of the third triode 1012b is a low level position signal. When the S pole of a certain magnetic steel of the annular magnetic steel passes through the second position hall device 1012a, the second position hall device 1012a does not generate a high level, the third triode 1012b is not conducted, and the collector output voltage of the third triode 1012b is a high level position signal because the second end of the fifth resistor R5 is connected with the external power supply VCC. Wherein, the external power VCC may be 5V.

The third low frequency filtering unit 1061f includes: a sixth resistor R6 and a sixth capacitor C6.

A first end of the sixth resistor R6 is connected to the third converting unit 1061e, and a second end of the sixth resistor R6 is connected to the sixth capacitor C6. The second terminal of the sixth capacitor C6 is connected to ground.

The third low-frequency filter unit 1061f forms a low-pass filter through the sixth resistor R6 and the sixth capacitor C6, and further filters low-frequency noise in the position signal output by the second position hall sensor 1012.

With continued reference to fig. 7, the position signal processing unit 1061 further includes: a fourth high frequency filtering unit 1061h, a fourth converting unit 1061i, and a fourth low frequency filtering unit 1061 g.

The fourth high-frequency filtering unit 1061h includes: a fourth magnetic bead FB4 and a seventh capacitance C7.

A first end of the fourth magnetic bead FB4 is connected to the position collecting unit 101, and a second end of the fourth magnetic bead FB4 is connected to the seventh capacitor C7 and the fourth converting unit 1061 i. A first terminal of the seventh capacitor C7 is connected to the fourth switching unit 1061i, and a second terminal of the seventh capacitor C7 is grounded.

As in the previous embodiments, the fourth bead FB4 and the seventh capacitor C7 in the fourth high-frequency filtering unit 1061h together function to filter out high-frequency interference signals in the position signal output by the third position hall sensor 1013.

The fourth conversion unit 1061i includes: a seventh resistor R7.

A first end of the seventh resistor R7 is connected to the fourth high frequency filter unit 1061h and the fourth low frequency filter unit 1061g, and a second end of the seventh resistor R7 is connected to the external power VCC.

The seventh resistor R7 is a pull-up resistor, and converts a change in resistance of the third position hall device 1013a in the third position hall sensor 1013 into a voltage signal. When the N pole of one of the ring-shaped magnetic steels passes through the third position hall device 1013a, the third position hall device 1013a generates a high level to turn on the fourth triode 1013b, and the collector of the fourth triode 1013b outputs a position signal with a low level voltage. When the S pole of a certain magnetic steel of the annular magnetic steel passes through the third position hall device 1013a, the third position hall device 1013a does not generate a high level, the fourth triode 1013b is not turned on, and the second end of the seventh resistor R7 is connected to the external power VCC, so that the collector output voltage of the fourth triode 1013b is a high-level position signal. Wherein, the external power supply can be 5V.

The fourth low frequency filtering unit 1061g includes: an eighth resistor R8 and an eighth capacitor C8.

A first end of the eighth resistor R8 is connected to the fourth converting unit 1061i, and a second end of the eighth resistor R8 is connected to the eighth capacitor C8. A second terminal of the eighth capacitor C8 is connected to ground.

The fourth low-frequency filter unit 1061g forms a low-pass filter through the eighth resistor R8 and the eighth capacitor C8, and further filters low-frequency noise in the position signal output by the third position hall sensor 1013.

In this embodiment, by processing the 3-way position signal generated by the position acquisition unit, noise in the position signal is removed, and the accuracy of the acquisition result is improved.

As shown in fig. 8, the present invention further provides an electric power assisted bicycle, which comprises the motor data collection control device 10 and the motor 20 in the foregoing embodiment, wherein the motor data collection control device 10 is used for collecting the position signal, the speed signal and the temperature signal of the motor 20, and determining the state of the motor 20 and controlling the rotation of the motor according to the position signal, the speed signal and the temperature signal.

The motor data acquisition control device 10 may be disposed on the motor 20 according to the manner described in the foregoing embodiment, and acquires the position signal, the speed signal, and the temperature signal of the motor 20.

The motor 20 may be disposed on a hub or a bottom bracket of the electric bicycle, and the specific location is not limited herein.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A motor data acquisition control device, characterized by comprising: the device comprises a position acquisition unit, annular magnetic steel, a speed acquisition unit, speed measurement magnetic steel, a temperature acquisition unit and a controller;

2. The motor data acquisition control device according to claim 1, wherein the speed acquisition unit includes: the speed Hall device and the first triode;

3. The motor data acquisition control device of claim 1, wherein the position acquisition unit comprises:

4. The motor data acquisition control device of claim 1, wherein the temperature acquisition unit comprises: a thermistor;

the second end of the thermistor is grounded.

5. The motor data acquisition control device of claim 1, wherein the controller comprises: the system comprises a position signal processing unit, a speed and temperature processing unit and a micro control unit;

6. The motor data acquisition control device of claim 5, wherein the speed and temperature processing unit comprises: the first high-frequency filtering unit, the first conversion unit and the first low-frequency filtering unit;

the first conversion unit includes: a first resistor;

the first end of the first resistor is connected with the first high-frequency filtering unit and the first low-frequency filtering unit, and the second end of the first resistor is connected with an external power supply;

and the second end of the second capacitor is grounded.

7. The motor data acquisition control device according to claim 5, wherein the position signal processing unit comprises: the second high-frequency filtering unit, the second conversion unit and the second low-frequency filtering unit;

the second conversion unit includes: a third resistor;

the first end of the third resistor is connected with the second high-frequency filtering unit and the second low-frequency filtering unit, and the second end of the third resistor is connected with an external power supply;

and the second end of the fourth capacitor is grounded.

8. The motor data acquisition control device of claim 5, wherein the position signal processing unit further comprises: the third high-frequency filtering unit, the third conversion unit and the third low-frequency filtering unit;

the third conversion unit includes: a fifth resistor;

a first end of the fifth resistor is connected with the third high-frequency filtering unit and the third low-frequency filtering unit, and a second end of the fifth resistor is connected with an external power supply;

and the second end of the sixth capacitor is grounded.

9. The motor data acquisition control device of claim 5, wherein the position signal processing unit further comprises: the fourth high-frequency filtering unit, the fourth conversion unit and the fourth low-frequency filtering unit;

the fourth conversion unit includes: a seventh resistor;

a first end of the seventh resistor is connected with the fourth high-frequency filtering unit and the fourth low-frequency filtering unit, and a second end of the seventh resistor is connected with an external power supply;

and the second end of the eighth capacitor is grounded.

10. An electrically assisted bicycle, characterized in that the electrically assisted bicycle comprises: the motor data acquisition and control device as claimed in any one of claims 1 to 9, and a motor, wherein the motor data acquisition and control device is configured to acquire a position signal, a speed signal and a temperature signal of the motor, determine a state of the motor according to the position signal, the speed signal and the temperature signal, and control the motor to rotate.