CN220692958U - Integrated small brushless DC motor - Google Patents

Abstract

The utility model discloses an integrated small brushless direct current motor, which comprises a shell, a motor, a circuit board, a control chip and a small alternating current-direct current conversion system, wherein the shell is arranged on the circuit board; a motor is fixedly arranged in the shell, and an output shaft of the motor extends out of the shell; the circuit board is fixedly arranged in the shell and sleeved on the machine body of the motor; the circuit board is fixedly connected with a power supply; the control chip is integrated on the circuit board, an integrated circuit is arranged in the control chip, and the integrated circuit is electrically connected with the motor; the miniaturized alternating current-direct current conversion system is integrated on the circuit board and is electrically connected with a power supply. The utility model connects the circuit board with the power supply, sets the integrated circuit in the single control chip, integrates the miniaturized AC/DC conversion system and the control chip on the same circuit board and is sleeved on the machine body of the motor, thereby realizing the integration of power supply, motor control and motor body, saving the space, reducing the installation difficulty and cost of the brushless DC motor and improving the reliability.

Description

Integrated small brushless DC motor

Technical Field

The utility model relates to the technical field of direct current brushless motors, in particular to an integrated small brushless direct current motor.

Background

Brushless DC motors are motors, commonly used in various appliances to drive, and typically rotate a shaft in the middle after the rotor is energized. Current brushless dc motors have some technical limitations, one of the main drawbacks being the separation between the power supply and the motor.

The conventional brushless dc motor requires an additional connection of a controller having various functions and a bulky ac-dc conversion system, which means that a plurality of power sources and connectors are additionally connected during installation and use. This not only increases the complexity of the installation and the risk of failure of the system, but also takes up valuable space.

Disclosure of Invention

The present utility model aims to provide an integrated small brushless dc motor which solves one or more of the technical problems of the prior art, and at least provides a beneficial choice or creation.

The utility model adopts the following technical scheme:

the integrated small brushless direct current motor comprises a shell, a motor, a circuit board, a control chip and a small alternating current-direct current conversion system;

the motor is fixedly arranged in the shell, and an output shaft of the motor extends out of the shell;

the circuit board is fixedly arranged in the shell and sleeved on the machine body of the motor;

the circuit board is fixedly connected with a power supply, and the power supply is used for supplying power to the circuit board;

the control chip is integrated on the circuit board, an integrated circuit is arranged in the control chip, and the integrated circuit is electrically connected with the motor;

the miniaturized AC/DC conversion system is integrated on the circuit board and is electrically connected with the power supply and used for converting the AC power input from the power supply into DC power.

Further, a plurality of mounting plates are arranged on the outer side wall of the shell, and mounting holes are formed in the mounting plates.

Further, the integrated circuit comprises a rotor position detection circuit, a control circuit, a speed regulation circuit, a driving circuit, an output circuit and a protection circuit;

the motor is provided with a stator, the stator is fixedly arranged on the inner wall of the shell, a rotor is arranged on the outer periphery of the stator in a rotating manner, and a coil is sleeved on the stator;

the rotor position detection circuit is electrically connected with the rotor and the control circuit;

the control circuit is electrically connected with the power supply and the output circuit;

the speed regulating circuit is electrically connected with the control circuit, the miniaturized alternating current-direct current conversion system and the driving circuit;

the driving circuit is electrically connected with the output circuit, and the output circuit is used for transmitting the current and the voltage output by the driving circuit to the protection circuit;

the protection circuit is electrically connected with the coil, and the current in the coil changes the magnetic pole of the stator, so that the rotor rotates under the action of a magnetic field.

Further, a temperature control sensor is integrated on the circuit board;

the temperature control sensor is electrically connected with the rotor and the control circuit, and detects the temperature of the rotor and stores temperature data into an electric signal to be transmitted to the control circuit.

Further, the miniaturized ac-dc conversion system can receive a wide power supply.

Compared with the prior art, the utility model has the beneficial effects that:

the utility model connects the circuit board with the power supply, sets the integrated circuit in the single control chip, integrates the miniaturized AC/DC conversion system and the control chip on the same circuit board and is sleeved on the machine body of the motor, thereby realizing the integration of power supply, motor control and motor body, saving the space, reducing the installation difficulty and cost of the brushless DC motor and improving the reliability.

Drawings

FIG. 1 is a control schematic block diagram of an integrated small brushless DC motor of the present utility model;

fig. 2 is a schematic structural view of an integrated small brushless dc motor according to the present utility model;

FIG. 3 is a partially exploded view of the circuit board of FIG. 2;

fig. 4 is a partially exploded view of the motor of fig. 1.

In the figure:

10. a housing; 11. a mounting plate; 12. a mounting hole;

20. a motor; 21. a stator; 22. a rotor; 23. a coil;

30. a circuit board;

40. a control chip; 41. an integrated circuit; 411. a rotor position detection circuit; 412. a control circuit; 413. a speed regulating circuit; 414. a driving circuit; 415. an output circuit; 416. a protection circuit;

50. a power supply;

60. a small AC/DC conversion system;

70. and a temperature control sensor.

Detailed Description

The present utility model will be further described with reference to the accompanying drawings and detailed description, wherein it is to be understood that, on the premise of no conflict, the following embodiments or technical features may be arbitrarily combined to form new embodiments.

The integrated small brushless DC motor as shown in FIGS. 1-4 comprises a housing 10, a motor 20, a circuit board 30, a control chip 40 and a small AC/DC conversion system 60; a motor 20 is fixedly arranged in the shell 10, and an output shaft of the motor 20 extends out of the shell 10; the circuit board 30 is fixedly arranged in the shell 10 and sleeved on the body of the motor 20; the circuit board 30 is fixedly connected with a power supply 50, and the power supply 50 is used for supplying power to the circuit board 30; the control chip 40 is integrated on the circuit board 30, an integrated circuit 41 is arranged in the control chip 40, the integrated circuit 41 is electrically connected with the motor 20, and the power supply 50 is connected with an external power supply; the miniaturized ac/dc conversion system 60 is integrated on the circuit board 30, and the miniaturized ac/dc conversion system 60 is electrically connected to the power supply 50 for converting the ac power output by the power supply 50 into dc power.

Specifically, the integrated circuit 41 includes a rotor position detection circuit 411, a control circuit 412, a speed regulation circuit 413, a drive circuit 414, an output circuit 415, and a protection circuit 416; the motor 20 is provided with a stator 21, the stator 21 is fixedly arranged on the inner wall of the shell 10, a rotor 22 is arranged on the outer turnover of the stator 21, and a coil 23 is sleeved on the stator 21; the rotor position detecting circuit 411 is electrically connected to the rotor 22 and the control circuit 412; the control circuit 412 is electrically connected to the power supply 50 and the output circuit 415; the speed regulating circuit 413 is electrically connected to the control circuit 412, the miniaturized ac-dc conversion system 60, and the driving circuit 414; the driving circuit 414 is electrically connected to the output circuit 415, and the output circuit 415 is configured to transmit the current and the voltage output by the driving circuit 414 to the protection circuit 416; the protection circuit 416 is electrically connected to the coil 23, and the current in the coil 23 changes the magnetic poles of the stator 21, so that the rotor 22 rotates under the action of the magnetic field. In this way, the rotor position detecting circuit 411 is used to determine the position of the rotor 22 and feed back the position information to the control circuit 412, and the speed regulating circuit 413 controls the driving circuit 414 to regulate the current and the voltage according to the position information of the rotor 22 transmitted from the control circuit 412; meanwhile, the control circuit 412 controls the phase sequence of the coils 23 sleeved on the stator 21 through the output circuit 415, and the protection circuit 416 controls the motor 20 to operate under normal constant-voltage driving when the set value is smaller than or equal to the set value, and constant-current driving when the set value is larger than the set value, so that the safe operation of the motor 20 is ensured.

As a preferred embodiment, the circuit board 30 has the temperature control sensor 70 integrated thereon; the temperature control sensor 70 is electrically connected to the rotor 22 and the control circuit 412, and the temperature control sensor 70 detects the temperature of the rotor 22 and stores the temperature data as an electrical signal to the control circuit 412.

Preferably, the miniaturized ac-dc conversion system 60 is capable of receiving a wide power supply.

Preferably, a plurality of mounting plates 11 are provided on the outer side wall of the housing 10, and mounting holes 12 are provided on the mounting plates 11.

The above embodiments are only preferred embodiments of the present utility model, and the scope of the present utility model is not limited thereto, but any insubstantial changes and substitutions made by those skilled in the art on the basis of the present utility model are intended to be within the scope of the present utility model as claimed.

Claims (5)

1. The small-size brushless direct current motor of integration, its characterized in that: the device comprises a shell, a motor, a circuit board, a control chip and a miniaturized alternating current-direct current conversion system;

the motor is fixedly arranged in the shell, and an output shaft of the motor extends out of the shell;

the circuit board is fixedly arranged in the shell and sleeved on the machine body of the motor;

the circuit board is fixedly connected with a power supply, and the power supply is used for supplying power to the circuit board;

the control chip is integrated on the circuit board, an integrated circuit is arranged in the control chip, and the integrated circuit is electrically connected with the motor;

the miniaturized AC/DC conversion system is integrated on the circuit board and is electrically connected with the power supply and used for converting the AC input by the power supply into DC.

2. The integrated small-sized brushless dc motor of claim 1, wherein: a plurality of mounting plates are arranged on the outer side wall of the shell, and mounting holes are formed in the mounting plates.

3. An integrated small brushless dc motor as claimed in claim 1 or 2, wherein: the integrated circuit comprises a rotor position detection circuit, a control circuit, a speed regulation circuit, a driving circuit, an output circuit and a protection circuit;

the motor is provided with a stator, the stator is fixedly arranged on the inner wall of the shell, a rotor is arranged on the outer periphery of the stator in a rotating manner, and a coil is sleeved on the stator;

the rotor position detection circuit is electrically connected with the rotor and the control circuit;

the control circuit is electrically connected with the power supply and the output circuit;

the speed regulating circuit is electrically connected with the control circuit, the miniaturized alternating current-direct current conversion system and the driving circuit;

the driving circuit is electrically connected with the output circuit, and the output circuit is used for transmitting the current and the voltage output by the driving circuit to the protection circuit;

the protection circuit is electrically connected with the coil, and the current in the coil changes the magnetic pole of the stator, so that the rotor rotates under the action of a magnetic field.

4. The integrated small brushless dc motor as claimed in claim 3, wherein: a temperature control sensor is integrated on the circuit board;

the temperature control sensor is electrically connected with the rotor and the control circuit, and detects the temperature of the rotor and stores temperature data into an electric signal to be transmitted to the control circuit.

5. The integrated small-sized brushless dc motor of claim 1, wherein: the miniaturized AC/DC conversion system can receive wide power supply.