KR20210081043A - Bracket intergrated bldc motor - Google Patents

Abstract

A bracket-integrated BLC motor is disclosed. According to an embodiment, the bracket-integrated BLC motor comprises: an upper bracket; a rotor rotating inside the upper bracket; a stator generating a rotational force by forming a magnetic field in the rotor; a control unit for controlling the rotor and the stator; a lower bracket coupled to the upper bracket; and a fastening part penetrating the holes of the upper bracket and the lower bracket to integrally fix the upper bracket and the lower bracket.

Description

Bracket integrated BLDC motor {BRACKET INTERGRATED BLDC MOTOR}

The disclosed embodiments relate to motor design techniques.

In general, a motor is a device that obtains rotational power by converting electrical energy into mechanical energy, and these motors are largely divided into AC motors and DC motors depending on the type of power applied, and among them, BLDC motors (BLDC: Brushless Direct Current Motor) is a type of DC motor.

The BLC motor is a motor composed of a stator having a coil and a rotor of a permanent magnet, and is widely used as a motor for variable speed driving. In particular, in recent years, thanks to the development of permanent magnet materials, the scope of application has been broadly expanded from home to industrial use, such as being used as a servo drive.

The driving principle of the BLC motor is that when a rotating magnetic field is applied to the stator winding made of three-phase winding, the magnetic flux caused by the rotating magnetic field and the magnetic flux of the permanent magnet interact to generate torque while the rotor rotates in a certain direction.

However, the BLC motor has a disadvantage in that vibration and noise are generated, and there is a need to improve these problems.

Korean Patent Publication No. 10-2018-0047042 (published on May 10, 2018)

The disclosed embodiments are for providing a bracket-integrated BLC motor.

A bracket-integrated BLC motor according to an embodiment includes an upper bracket; a rotor rotating inside the upper bracket; a stator generating a rotational force by forming a magnetic field in the rotor; a control unit for controlling the rotor and the stator; a lower bracket coupled to the upper bracket; and a fastening part penetrating the holes of the upper bracket and the lower bracket to integrally fix the upper bracket and the lower bracket.

The bracket-integrated BLC motor further includes a hall sensor sensing a rotation angle and rotation speed of the rotor, and the control unit feedback-controls the rotor and the stator based on the sensed rotation angle and rotation speed. can do.

The bracket-integrated BLC motor may further include an overvoltage and reverse current prevention unit for preventing overvoltage and reverse current generated by the control of the rotor and the stator.

According to the disclosed embodiments, it is possible to secure the effect of reducing vibration and noise of the motor by performing feedback control by sensing the rotation angle and rotation speed of the rotor.

In addition, according to the disclosed embodiments, by integrally connecting the rotor, the stator and the bracket, the cost reduction effect can be expected by simplifying the production and assembly process of the motor.

1 is an exploded perspective view of a bracket-integrated BLC motor according to an embodiment;

Hereinafter, specific embodiments will be described with reference to the drawings. DETAILED DESCRIPTION The following detailed description is provided to provide a comprehensive understanding of the methods, devices, and/or systems described herein. However, this is only an example and is not limited thereto.

In describing the embodiments, when it is determined that a detailed description of a related known technology may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted. And, the terms to be described later are terms defined in consideration of functions, which may vary depending on the intention or custom of the user or operator. Therefore, the definition should be made based on the content throughout this specification. The terminology used in the detailed description is for the purpose of describing the embodiments only, and should in no way be limiting. Unless explicitly used otherwise, expressions in the singular include the meaning of the plural. Also, expressions such as “comprising” or “comprising” are intended to indicate certain features, numbers, steps, acts, elements, some or combination thereof, and one or more other features than those described. , should not be construed to exclude the presence or possibility of any number, step, action, element, or any part or combination thereof.

1 is an exploded perspective view of a bracket-integrated BLC motor 100 according to an embodiment.

Referring to FIG. 1 , the bracket-integrated BLC motor 100 includes an upper bracket, a rotor, a stator, a control unit, a lower bracket, and a fastening unit.

The upper bracket forms the body of the motor.

The rotor rotates inside the upper bracket.

Specifically, the rotor may rotate by interacting with the stator to which a permanent magnet is attached.

The stator creates a magnetic field in the rotor to generate rotational force.

Specifically, the stator includes a coil that forms a rotating magnetic field, and may be integrally coupled to the upper bracket.

The control unit controls the rotor and the stator.

Specifically, the controller may control the operation of the rotor and the stator by controlling the current flowing in the coil.

The lower bracket is coupled to the upper bracket.

The fastening part penetrates the holes of the upper bracket and the lower bracket to integrally fix the upper bracket and the lower bracket.

In one embodiment, the fastening portion may be a screw.

Also, in one embodiment, the bracket-integrated BLC motor 100 further includes a Hall sensor and an overvoltage and reverse current prevention unit.

The Hall sensor may detect the rotation angle and rotation speed of the rotor.

Specifically, the Hall sensor may detect a counter electromotive force induced on each phase of the rotor. At this time, the hall sensor may sense the rotation angle and rotation speed of the rotor through the detected back electromotive force.

In an embodiment, the controller may feedback-control the rotor and the stator based on the sensed rotation angle and rotation speed.

Specifically, the controller may compare the preset target rotation angle and rotation speed with the rotation angle and rotation speed sensed by the hall sensor. The controller may perform feedback control until the sensed rotation angle and rotation speed match the target rotation angle and rotation speed.

The overvoltage and reverse current prevention unit may prevent overvoltage and reverse current generated by the control of the rotor and the stator.

Also, in one embodiment, the bracket-integrated BLC motor may further include a MOSFET gate driver.

In the above, the technical features have been described focusing on the embodiments. However, the disclosed embodiments should be considered from an illustrative point of view rather than a limiting point of view, and the scope of the rights is indicated in the claims rather than the foregoing description, and all differences within the scope equivalent thereto are interpreted as included in the scope of rights. it should be

100: bracket integrated BLC motor

Claims (3)

upper bracket;
a rotor rotating inside the upper bracket;
a stator generating a rotational force by forming a magnetic field in the rotor;
a control unit for controlling the rotor and the stator;
a lower bracket coupled to the upper bracket; and
A bracket-integrated BLC motor including a fastening part penetrating through the holes of the upper bracket and the lower bracket to integrally fix the upper bracket and the lower bracket.
The method according to claim 1,
Further comprising a hall sensor for sensing the rotation angle and rotation speed of the rotor,
The control unit is a bracket-integrated BLC motor for feedback-controlling the rotor and the stator based on the sensed rotation angle and rotation speed.
The method according to claim 1,
The bracket-integrated BLC motor further comprising an overvoltage and reverse current prevention unit for preventing overvoltage and reverse current generated by the control of the rotor and the stator.

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