Direct-current brushless motor

Abstract

The utility model provides a direct current brushless motor, which comprises a motor body, a support, a driving plate, a sealing cover and a fastener, the support is positioned below the motor body, the driving plate is positioned between the sealing cover and the motor body, the sealing cover is positioned on the right side of the driving plate, and the fastener is used for fixing each component. The motor does not need a capacitor, the driver can receive a control instruction, and the torque / speed of the motor can be controlled.

Description

Technical Field

[0001] The utility model belongs to the field of motors, and in particular relates to a brushless DC motor. Background Art

[0002] Power tools refer to tools that use motors to drive functional components to replace manual labor. For some materials and objects that are uneven, uneven in thickness, and do not meet the process requirements, grinding, planing, hammer drilling, polishing, etc., they are made smooth and flat, with uniform thickness, and the process meets the standards. They are used in various veneer production, standard structural parts production, toy handicraft industry, decoration and furniture industry, floor wall panel building materials industry, etc. Power tools include belt sanders, sanders, shaft sanders, electric planers, impact drills, jig saws, electric circular saws, angle grinders, etc.

[0003] AC motors must be used with capacitors because single-phase electricity has no phase angle. The function of capacitors is to provide a phase angle for the main and auxiliary windings, so capacitors are essential components. Brushless DC motors are drive-controlled motors and do not require capacitors. The driver receives control instructions to control the motor torque / speed.

[0004] A brushless DC motor is a rotating motor that can convert DC power into mechanical energy (DC motor) or mechanical energy into DC power (DC generator). It is a motor that can realize the mutual conversion between DC power and mechanical energy. When it operates as a motor, it is a DC motor that converts electrical energy into mechanical energy; when it operates as a generator, it is a DC generator that converts mechanical energy into electrical energy. Utility Model Content

[0005] The utility model aims to provide a brushless DC motor.

[0006] The technical solution of the present invention is as follows:

[0007] A brushless DC motor comprises a motor body, a bracket, a drive plate, a cover and a fastener, wherein the bracket is located below the motor body, the drive plate is located between the cover and the motor body, the cover is located on the right side of the drive plate, and the fastener is used to fix various components.

[0008] Furthermore, the brushless DC motor also includes a power module and a control module.

[0009] Furthermore, the control module includes

[0010] Current surge protection circuit, used to protect the circuit board from damage caused by sudden current surge;

[0011] Speed ​​regulation signal recognition module, used to recognize and process speed regulation signals to achieve precise speed control of motors or other equipment;

[0012] Rectification, filtering and AC-to-DC circuits are used to convert input AC power into stable DC power for use in subsequent circuits;

[0013] MCU main control unit coordinates the work of each module;

[0014] The driving circuit is responsible for driving the external device to perform specific control tasks;

[0015] Infrared setting circuit supports parameter setting of circuit board via infrared remote control.

[0016] Furthermore, the rectification, filtering and AC to DC circuit includes a rectifier bridge and a filter capacitor, which is used to convert the input AC power into pulsating DC power first through the rectifier bridge, and then remove the noise through the filter capacitor to obtain a stable DC power supply for subsequent circuits.

[0017] Furthermore, the control module also includes an indicator light for displaying the working status of the circuit board.

[0018] Technical effects of the utility model:

[0019] The motor of the utility model does not require a capacitor, and the driver can receive control instructions to control the torque / speed of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings generally illustrate various embodiments by way of example and not limitation, and together with the specification and claims, are used to illustrate embodiments of the utility model. When appropriate, the same reference numerals are used throughout the drawings to refer to the same or similar parts. Such embodiments are illustrative and are not intended to be exhaustive or exclusive embodiments of the present device or method.

[0021] Figure 1 The schematic diagram of the motor structure of the utility model is shown;

[0022] Figure 2 The schematic diagram of the control circuit structure of the utility model is shown. DETAILED DESCRIPTION

[0023] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0024] The embodiment of the utility model provides a brushless DC motor, comprising a motor body 1, a bracket 2, a drive plate 3, a cover 4 and a fastener 5, wherein the bracket 2 is located below the motor body 1, the drive plate 3 is located between the cover 4 and the motor body 1, the cover 4 is located on the right side of the drive plate 3, and the fastener 5 is used to fix the various components.

[0025] The brushless DC motor also includes a power module and a control module.

[0026] The control module includes: current surge protection circuit, used to protect the circuit board from damage caused by sudden current surge; speed regulation signal recognition module, used to identify and process speed regulation signals to achieve precise speed control of motors or other equipment; rectification filter and AC to DC circuit, used to convert input AC power into stable DC power for subsequent circuit use; MCU main control unit, coordinated the work of each module; drive circuit, responsible for driving external devices to perform specific control tasks; infrared setting circuit, supports parameter setting of the circuit board through infrared remote control, and the back of the IPM power module, responsible for the conversion, distribution and protection of electric energy, to ensure efficient and safe operation of the circuit board. UVW phase line, used to connect the three-phase AC power supply to provide power for the circuit board. DC electrolytic capacitor, as an important energy storage and filtering element in the circuit, plays a key role in maintaining the stability and performance of the circuit.

[0027] The rectification, filtering and AC-to-DC circuit includes a rectifier bridge and a filter capacitor, which is used to convert the input AC power into pulsating DC power first through the rectifier bridge, and then remove the noise through the filter capacitor to obtain a stable DC power supply for subsequent circuits.

[0028] The control module also includes an indicator light for displaying the working status of the circuit board.

[0029] The internal operation of the AC motor is an asynchronous motor. Its internal stator and rotor do not run synchronously. The phase angle of the stator magnetic field is ahead of the rotor magnetic field. During the commutation (rotation) process, the phase angle difference will form an electromagnetic interference. The electromagnetic interference will hit the wall and rebound inside the motor, forming a buzzing noise. In other words, the lower the gear, the more internal stator windings, and the greater the electromagnetic vibration wave generated, so the low-gear motor has the largest buzzing sound.

[0030] In brushless DC motors, the internal stator and rotor run synchronously, so no electromagnetic interference occurs, thereby greatly reducing the noise generated by the motor operation itself.

[0031] AC motors must be used with capacitors because single-phase electricity has no phase angle. The function of capacitors is to provide a phase angle for the main and auxiliary windings, so capacitors are essential components. Brushless DC motors are drive-controlled motors and do not require capacitors. The driver receives control instructions to control the motor torque / speed.

[0032] The above is only a preferred specific implementation of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical solution and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A brushless DC motor, characterized in that: The motor comprises a motor body (1), a bracket (2), a drive plate (3), a cover (4) and a fastener (5), wherein the bracket (2) is located below the motor body (1), the drive plate (3) is located between the cover (4) and the motor body (1), the cover (4) is located on the right side of the drive plate (3), and the fastener (5) is used to fix various components.

2. The brushless DC motor according to claim 1, characterized in that: The brushless DC motor also includes a power module and a control module.

3. The brushless DC motor according to claim 2, characterized in that: The control module includes Current surge protection circuit, used to protect the circuit board from damage caused by sudden current surge; Speed ​​regulation signal recognition module, used to recognize and process speed regulation signals to achieve precise speed control of motors or other equipment; Rectification, filtering and AC-to-DC circuits are used to convert input AC power into stable DC power for use in subsequent circuits; MCU main control unit coordinates the work of each module; The driving circuit is responsible for driving the external device to perform specific control tasks; Infrared setting circuit supports parameter setting of circuit board via infrared remote control.

4. The brushless DC motor according to claim 3, characterized in that: The rectification, filtering and AC-to-DC circuit includes a rectifier bridge and a filter capacitor, which is used to first convert the input AC power into pulsating DC power through the rectifier bridge, and then remove the clutter through the filter capacitor to obtain a stable DC power supply for subsequent circuits.

5. The brushless DC motor according to claim 2, characterized in that: The control module also includes an indicator light for displaying the working status of the circuit board.

Images