CN215498783U - Driving system of motor and handheld direct-drive stirrer - Google Patents

Abstract

The utility model discloses a driving system of a motor and a handheld direct-drive stirrer, which comprise a shell, a direct-current brushless motor and a driving system, wherein the direct-current brushless motor and the driving system are arranged on the shell; the power supply unit comprises an alternating current input module, a first power supply module and a second power supply module; the motor driving unit comprises a driving control module and a driving module connected with the direct current brushless motor, and the driving control module is connected with the driving module; it is connected through actuating system and brushless DC motor for the agitator is reliable and stable in the use, and the motor is difficult to damage, and is stable during the stirring, reaches the purpose of the even stirring of mixture, and the degree of consistency after the stirring is higher.

Description

Driving system of motor and handheld direct-drive stirrer

Technical Field

The utility model relates to the technical field of motor drive control of a stirrer, in particular to a motor drive system and a handheld direct-drive stirrer.

Background

The stirrer is a common device for mixing and stirring various materials, mainly aiming at the stirring of fluid which is divided into gas, liquid, semisolid, granular solid and the like according to phases, and is widely applied to various industries, such as food processing industry, building industry, chemical industry and the like, and particularly, when gypsum and putty powder are used in building decoration engineering construction, water or bonding glue needs to be added and stirred into paste. Generally, the stirrer comprises a motor, and an output shaft of the motor is connected with a shaft body of the stirring paddle, but the stirrer is started to work after being directly connected with alternating current, so that the motor is easy to damage due to unstable current in work, and the stability during stirring is poor, so that the uniformity of a mixture is not ideal.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical defects and provides a motor driving system and a handheld direct-drive stirrer.

The utility model designs a driving system of a motor, which comprises a power supply unit, a motor driving unit and a central control unit; the power supply unit comprises an alternating current input module, a first power supply module and a second power supply module; the motor driving unit comprises a driving control module and a driving module connected with the motor, and the driving control module is connected with the driving module; the central control unit comprises a control chip; the first output end of the alternating current input module is connected with the input end of the first power supply module and the input end of the driving module respectively, the second output end of the first power supply module is connected with the input end of the second power supply module and the input end of the driving control module respectively, and the third output end of the second power supply module is connected with the control chip.

Preferably, the alternating current detection device further comprises an alternating current detection unit, a first acquisition end of the alternating current detection unit is connected with an alternating current detection end of the alternating current input module, and a fourth output end of the alternating current detection unit is connected with the control chip.

Preferably, the direct current detection device further comprises a direct current detection unit, a second acquisition end of the direct current detection unit is connected with a first output end of the alternating current input module, and a fifth output end of the direct current detection unit is connected with the control chip.

Preferably, the driving circuit further comprises a driving current acquisition unit, a third acquisition end of the driving current acquisition unit is connected with the current detection end of the driving module, and a sixth output end of the driving current acquisition unit is connected with the control chip.

Preferably, the power supply device further comprises a Hall sensor, and the Hall sensor is respectively connected with the second power supply module and the control chip.

Preferably, the device further comprises a first temperature sensor, and the first temperature sensor is connected with the control chip.

Preferably, the device further comprises a second temperature sensor, and the second temperature sensor is connected with the control chip.

Preferably, the alternating current input module further comprises a control switch, and the control switch is connected with the input end of the alternating current input module through a connecting wire.

Preferably, the alternating current input module further comprises a speed regulation switch, and the speed regulation switch is connected to a connecting line between the control switch and the input end of the alternating current input module.

On the other hand, the handheld direct-drive stirrer comprises a shell, a direct-current brushless motor and the driving system, wherein the shell comprises a handle part and an accommodating cavity, the driving system is installed in the accommodating cavity, the direct-current brushless motor is installed on the shell, and a driving module of the driving system is connected with the direct-current brushless motor.

According to the driving system of the motor and the handheld direct-drive stirrer, the driving system is connected with the direct-current brushless motor, so that the stirrer is stable and reliable in the using process, the motor is not easy to damage, the stirrer is stable during stirring, the purpose of uniformly stirring a mixture is achieved, and the uniformity after stirring is high.

Drawings

FIG. 1 is a schematic diagram of the overall system architecture;

FIG. 2 is a schematic diagram of an AC input module;

FIG. 3 is a schematic diagram of a first power supply module;

FIG. 4 is a schematic diagram of a second power supply module;

FIG. 5 is a schematic diagram of a drive control module;

FIG. 6 is a schematic view of a drive module configuration;

FIG. 7 is a schematic diagram of a central control unit;

FIG. 8 is a schematic structural diagram of an AC detecting unit;

FIG. 9 is a schematic structural diagram of a DC current detecting unit;

FIG. 10 is a schematic structural diagram of a driving current collecting unit;

FIG. 11 is a schematic diagram of a Hall sensor structure;

FIG. 12 is a schematic view of a first temperature sensor configuration;

FIG. 13 is a schematic view of a second temperature sensor configuration;

FIG. 14 is a schematic view of a hand-held direct drive agitator configuration;

fig. 15 is an exploded view of a hand held direct drive mixer.

In the figure; the power supply device comprises a power supply unit 1, an alternating current input module 11, a rectifier bridge 111, a filter module 112, a relay 113, a first output end 114, an alternating current detection end 115, a first power supply module 12, a second output end 121, a second power supply module 13, a third output end 131, a speed regulation switch 14, a motor drive unit 2, a drive control module 21, a drive module 22, a current detection end 221, a central control unit 3, a control chip 31, an alternating current detection unit 4, a first acquisition end 41, a fourth output end 42, a direct current detection unit 5, a second acquisition end 51, a fifth output end 52, a hall sensor 6, a first temperature sensor 7, a second temperature sensor 8, a drive current acquisition unit 9, a third acquisition end 91, a sixth output end 92, a control switch 10, a shell 100, a handle part 101, an upper shell 102, an end cover 103, a middle plate 104, a lower shell 105, a through hole 106, a heat dissipation hole 107, and a power supply module, The brushless direct-current motor comprises a through hole 108, a brushless direct-current motor 200, a heat dissipation block 300, a first insulated gate bipolar transistor Q2, a second insulated gate bipolar transistor Q3, a third insulated gate bipolar transistor Q4, a fourth insulated gate bipolar transistor Q5, a fifth insulated gate bipolar transistor Q6, a sixth insulated gate bipolar transistor Q7, a capacitor C10, a first winding U, a second winding V, a third winding W, a fuse F1, a resistor R7 and a transformer L2.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments that can be derived by one of ordinary skill in the art from the embodiments given herein are intended to be within the scope of the present invention.

Example (b):

as shown in fig. 1 to 13, the driving system of the motor described in the present embodiment includes a power supply unit 1, a motor driving unit 2, and a central control unit 3; the power supply unit 1 comprises an alternating current input module 11, a first power supply module 12 and a second power supply module 13; the motor driving unit 2 comprises a driving control module 21 and a driving module 22 connected with a motor, and the driving control module 21 is connected with the driving module 22; the central control unit 3 includes a control chip 31, please refer to fig. 7; a first output end 114 of the alternating current input module 11 is connected with an input end of the first power supply module 12 and an input end of the driving module 22 respectively, a second output end 121 of the first power supply module 12 is connected with an input end of the second power supply module 13 and an input end of the driving control module 21, and a third output end 131 of the second power supply module 13 is connected with the control chip 31; the stirrer further comprises a control switch 10, the control switch 10 is connected with the input end of the alternating current input module 11 through a connecting wire, and a motor of the stirrer is a direct current brushless motor.

Specifically, referring to fig. 2, fig. 3 and fig. 4, the ac input module 11 includes a transformer L2, a rectifier bridge 111, a filter module 112 and a relay 113, the system is started, 220V ac power is input into the ac input module 11, 310V DC power is formed by rectification through the rectifier bridge 111, the filter module 112 filters the 310V DC power to form flat and stable 310V DC power for output, the 310V DC power is respectively input to the DC/DC module of the first power supply module 12 and the 310V input end of the driving module 22, the DC/DC module converts the 310V DC power to obtain 15V DC power, the 15V DC power is respectively input to the input end of the second power supply module 13 and the input end of the driving control module 21, the second power supply module 13 converts the 15V DC power to obtain 3.3V DC power, and the 3.3V DC power is input to the control chip 31; during filtering, the 310V instantaneous high voltage is input to the filtering module 112, and at this time, the relay 113 works and cooperates with the resistor R7 to buffer the input 310V power-on instantaneous high voltage, so as to protect the capacitor C10 on the filtering module 112, and thus the system use performance is better.

Referring to fig. 5 and 6, the driving control module 21 is a driving IC chip or other known single chip microcomputer matched with a three-phase six-bridge driving circuit, the driving module 22 is a three-phase six-bridge driving circuit, the three-phase six-bridge driving circuit can reduce current fluctuation and torque ripple, so that the motor outputs a large torque, six igbts are used in a motor driving part to control an output voltage, the driving IC chip utilizes the switching characteristics of the igbts to control the energization of the motor according to the detected rotor position of the motor (detected by a hall sensor), for example, when the first igbts Q2 and the fifth igbts Q6 are turned on, the first winding U and the second winding V are turned on, and the current flows to the positive pole of the power supply → the first igbts Q2 → U → the winding V → the fifth igbts Q6 → the negative pole of the power supply, in this way, the turn-on sequence of the insulated gate bipolar transistors may be that the first insulated gate bipolar transistor Q2 and the fifth insulated gate bipolar transistor Q6 are turned on, and the first winding U and the second winding V are turned on; or the first insulated gate bipolar transistor Q2 and the sixth insulated gate bipolar transistor Q7 are turned on, and the first winding U and the third winding W are conducted; or the second insulated gate bipolar transistor Q3 and the fourth insulated gate bipolar transistor Q5 are turned on, and the first winding U and the second winding V are conducted; or the second insulated gate bipolar transistor Q3 and the sixth insulated gate bipolar transistor Q7 are turned on, and the second winding V and the third winding W are conducted; or the third insulated gate bipolar transistor Q4 and the fourth insulated gate bipolar transistor Q5 are turned on, and the first winding U and the third winding W are conducted; or the third insulated gate bipolar transistor Q4 and the fifth insulated gate bipolar transistor Q6 are turned on, and the second winding V is conducted with the third winding W; the opening mode can realize the continuous operation of the brushless direct current motor as long as the accurate reversing is carried out at a proper time.

Preferably, the ac input module 11 includes a fuse F1, and the fuse F1 is used for fusing when the ac input is too large, so as to protect the entire driving system from being damaged, please refer to fig. 1.

In this embodiment, the ac power detection unit 4 is further included, the first acquisition end 41 of the ac power detection unit 4 is connected to the ac detection end 115 of the ac input module 11, the fourth output end 42 of the ac power detection unit 4 is connected to the control chip 31, and detects whether the 220V ac power is normally input, if so, the control chip 31 controls the whole system to start, and if not, the control chip 31 controls the whole system to be in a shutdown state, please refer to fig. 8.

In this embodiment, the dc detection unit 5 is further included, the second acquisition end 51 of the dc detection unit 5 is connected to the first output end 114 of the ac input module 11, the fifth output end 52 of the dc detection unit 5 is connected to the control chip 31, which first detects whether the current output of 310V exists at the first output end 114, when the current output exists, the acquired dc is input into the control chip 31, and the control chip 31 determines whether the current output is lower than 310V or higher than 310V according to a built-in program, when the current output is lower than 310V, the control chip 31 controls an alarm lamp connected thereto to flash, and when the current output is higher than 310V, the control chip 31 refers to and controls the overall system to stop, please refer to fig. 9.

In this embodiment, the driving circuit further includes a driving current collecting unit 9, a third collecting end 91 of the driving current collecting unit 9 is connected to the current detecting end 221 of the driving module 22, and a sixth output end 92 of the driving current collecting unit 9 is connected to the control chip 31; the driving current collected from the three-phase six-bridge driving circuit is transmitted to the control chip 31 in real time, when the control chip 31 obtains a voltage larger than 310V, the whole system is controlled to be shut down, so that the overcurrent protection effect is achieved, the driving current collecting unit 9 obtains the 3.3V direct current output by the second power supply module 13 for power supply, and please refer to fig. 10.

In this embodiment, the brushless dc motor further includes a hall sensor 6, the hall sensor 6 is respectively connected to the second power supply module 13 and the control chip 31, and the hall sensor 6 is disposed on the brushless dc motor and is configured to detect a rotation speed of the rotor in a rotation state and a position of the rotor in a shutdown state, please refer to fig. 11.

In the embodiment, the temperature controller further comprises a first temperature sensor 7, wherein the first temperature sensor 7 is connected with the control chip 31; the first temperature sensor 7 may be disposed on the motor or a PCB of the driving system, all circuits of the driving system are integrated on the PCB, and the first temperature sensor 7 obtains the 3.3V dc power output by the second power supply module 13 for power supply, please refer to fig. 12.

In the embodiment, the temperature controller further comprises a second temperature sensor 8, wherein the second temperature sensor 8 is connected with the control chip 31; the second temperature sensor 8 is matched with the first temperature sensor 7, the first temperature sensor 7 can be arranged on the motor, and the second temperature sensor 8 can be arranged on a PCB of the driving system, so as to detect the temperature of the motor and the PCB, when the temperature is higher than the preset temperature in the control chip 31, the driving system is shut down, and the second temperature sensor 8 obtains the 3.3V direct current output by the second power supply module 13 for power supply, please refer to fig. 13.

In another embodiment, the speed regulation device further comprises a speed regulation switch 14, the speed regulation switch 14 is connected to a connection line between the control switch 10 and the input end of the ac input module 11, wherein the speed regulation switch 14 adopts a resistor speed regulator, and the magnitude of current is controlled by changing the resistance value of a resistor, so as to achieve the purpose of controlling the rotation speed of the motor.

As shown in fig. 14 and fig. 15, a hand-held direct-drive agitator is obtained based on the above-mentioned driving system, and specifically includes a housing 100, a dc brushless motor 200 and the above-mentioned driving system, where the housing 100 includes a handle portion 101 and a receiving cavity, the driving system is installed in the receiving cavity, the dc brushless motor 200 is installed on the housing 100, and a driving module 22 of the driving system is connected to the dc brushless motor 200; the casing 100 further includes an end cover 103, an upper casing 102, a middle plate 104 and a lower casing 105, the middle plate 104 is provided with a through hole 106, the upper casing 102 and the end cover 103 are respectively fixed on the upper surface and the lower surface of the middle plate 104 through bolts, the end of the dc brushless motor 200 is fixed on the end cover 103 through bolts, the driving system is fixed in the cavity of the upper casing 102 through a PCB, the PCB is fixed with a heat dissipation block 300 with heat dissipation fins, and the upper casing 102 is provided with heat dissipation holes 107. The lower casing 105 is fixed with the lower surface of the end cover 103 after being sleeved on the dc brushless motor, the cavity of the upper casing 102 and the cavity of the lower casing 105 are combined with each other to form an accommodating cavity, the left side and the right side of the middle plate 104 are respectively provided with a through hole 108 to form two handle parts 101, the speed regulating switch 14 and the control switch 10 of the driving system are installed on the handle parts 101, and the rotating shaft of the dc brushless motor penetrates through the lower casing 105.

The present invention is not limited to the above-mentioned preferred embodiments, and any other products in various forms can be obtained by anyone in the light of the present invention, but any changes in the shape or structure thereof, which have the same or similar technical solutions as those of the present application, fall within the protection scope of the present invention.

Claims (10)

1. A drive system of a motor is characterized by comprising a power supply unit (1), a motor drive unit (2) and a central control unit (3); the power supply unit (1) comprises an alternating current input module (11), a first power supply module (12) and a second power supply module (13); the motor driving unit (2) comprises a driving control module (21) and a driving module (22) connected with a motor, and the driving control module (21) is connected with the driving module (22); the central control unit (3) comprises a control chip (31);

a first output end (114) of the alternating current input module (11) is connected with an input end of the first power supply module (12) and an input end of the driving module (22) respectively, a second output end (121) of the first power supply module (12) is connected with an input end of the second power supply module (13) and an input end of the driving control module (21) respectively, and a third output end (131) of the second power supply module (13) is connected with the control chip (31).

2. The driving system of an electric motor according to claim 1, further comprising an ac detection unit (4), wherein the first collecting terminal (41) of the ac detection unit (4) is connected to the ac detection terminal (115) of the ac input module (11), and the fourth output terminal (42) of the ac detection unit (4) is connected to the control chip (31).

3. The driving system of an electric motor according to claim 1, further comprising a dc detection unit (5), wherein the second collecting terminal (51) of the dc detection unit (5) is connected to the first output terminal (114) of the ac input module (11), and the fifth output terminal (52) of the dc detection unit (5) is connected to the control chip (31).

4. The driving system of an electric motor according to claim 1, further comprising a driving current collecting unit (9), wherein a third collecting terminal (91) of the driving current collecting unit (9) is connected to the current detecting terminal (221) of the driving module (22), and a sixth output terminal (92) of the driving current collecting unit (9) is connected to the control chip (31).

5. The driving system of an electric motor according to claim 1, further comprising a hall sensor (6), wherein the hall sensor (6) is connected to the second power supply module (13) and the control chip (31), respectively.

6. The driving system of an electric motor according to claim 1, further comprising a first temperature sensor (7), the first temperature sensor (7) being connected to the control chip (31).

7. The driving system of an electric motor according to claim 6, further comprising a second temperature sensor (8), the second temperature sensor (8) being connected to the control chip (31).

8. The drive system of an electric motor according to claim 6, further comprising a control switch (10), wherein the control switch (10) is connected to the input terminal of the AC input module (11) via a connection line.

9. The driving system of an electric motor according to claim 8, further comprising a speed-regulating switch (14), wherein the speed-regulating switch (14) is connected to a connection line between the control switch (10) and the input terminal of the ac input module (11).

10. A hand-held direct-drive stirrer, which is characterized by comprising a shell (100), a direct-current brushless motor (200) and a driving system as claimed in any one of claims 1 to 9, wherein the shell (100) comprises a handle part (101) and a containing cavity, the driving system is arranged in the containing cavity, the direct-current brushless motor (200) is arranged on the shell (100), and a driving module (22) of the driving system is connected with the direct-current brushless motor (200).

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