What is brushed DC motor
Brushed DC Motor (BDC Motor) is a kind of direct current energy into mechanical energy of the rotary motor, it is a more classic class of products in the motor industry, mainly through the stator generated by the magnetic field and the rotor current interaction torque, so that the rotor rotation, thereby driving the mechanical load. The brushed DC motor is widely used in various industries with its simple control mode and good speed regulation characteristics, but also because of the wear problem of brushes and commutators, the service life is relatively short.
Brushed dc motor types
Brushed DC Motor Design
Main parts of Brushed DC Motors
Brushed motors are designed based on the four main components of their core: stator, rotor, commutator and brush. They work with each other to realize the energy conversion and mechanical movement of the motor.
Stator: The stator is the fixed part of the brushed DC motor, which is mainly responsible for generating the magnetic field in the motor. In design, the stator can be divided into winding type and permanent magnet.
Rotor: The rotor is the rotating part of the motor, which is mainly composed of a coil and an iron core, usually using a winding structure in order to generate induced electromotive force in a magnetic field.
Commutator: The commutator is a ring device installed on the rotor shaft, which is one of the key components of the brush motor, which determines the stable operation and efficiency of the motor.
Brush: A brush is a movable conductive material, usually made of graphite or copper, that is mounted on the commutator, and its role is to connect an external power source to the commutator, allowing current to pass through the rotor windings.
(Note: Friction between the brush and the commutator causes a certain amount of wear, which is one of the reasons brushed motors have a relatively short life and require regular maintenance and replacement.)
Motor Design Variations of Brushed DC Motor
Based on design variations, brushed DC motor can be divided into the following types, each with its own unique design features:
Winding stator motor: The stator of this motor consists of winding coils that generate a magnetic field through an external power source. The advantage of this design is that the magnetic field strength can be adjusted according to demand, but the design is also relatively complicated.
Permanent magnet motor: The stator of this motor uses a permanent magnet, and the design simplifies the construction, so that there is no need for an external magnetic field generation device. The volume of the motor is reduced, and the efficiency is improved.
Axial magnetic field motor: Axial magnetic field motor adopts axial magnetic field design, that is, the magnetic field is distributed along the axis of the motor, not radial like the traditional DC motor, such design can make the motor structure more flat and compact, while providing high torque density.
Brushed DC Motor Working Principle
The working principle of brushed DC motor is based on electromagnetic induction and commutation principle. After the external power supply is passed to the commutator through the brush, the current flows through the commutator into the rotor coil, which creates a magnetic field in the rotor coil. Since the stator magnetic field is fixed, the current in the rotor is subjected to a Lorentz force in the stator magnetic field, creating a torque that causes the rotor to rotate.
In this process, the commutator will constantly change the direction of the current flowing through the rotor coil, ensuring that the rotor after each half revolution, the direction of the generated magnetic field can interact with the stator magnetic field, thus maintaining continuous rotation. This is the core mechanism of the brush motor that can continue to operate.
Advantages and disadvantages of brushed DC motor
Advantages:
Simple control: Only by adjusting the voltage or current, you can easily control the speed and torque of the motor.
High starting torque: high starting torque can be generated at low speed. Compared with some brushless motors, the starting performance of brushless DC motors is more superior.
Low cost: Due to the simple structure and mature production process, the manufacturing cost of brushed DC motors is relatively low.
No complex drive circuit: Compared with the brushless DC motor, the brushless DC motor does not need complex electronic drive circuit, making its design more simplified.
Disadvantages:
Loud noise: In the operation process, due to the contact and friction of the brush and commutator, it will produce a certain noise.
Short life: Due to the continuous friction of the brush and the commutator, the service life of the brushed DC motor is relatively short.
Electrical spark problem: When the brush is in contact with the commutator, it will produce electrical sparks, which will not only accelerate the wear of the parts, but also may cause safety hazards in some occasions.
Application of brushed DC motor
The application of brushed DC motor is very wide, covering household appliances, automobile industry, industrial automation, power tools, toys and other fields. Its simple structure, low cost, easy to control, suitable for electric shavers, electric toothbrushes, window motors and other small equipment and devices. In addition, brush motors are also commonly found in some medical equipment, office equipment and educational robots.
Although with the development of brushless DC motors, products in many fields have gradually adopted brushless motors to improve efficiency and service life, due to the low cost and easy to operate characteristics of brushless DC motors, it occupies an important position in some cost-sensitive, compact and low-life products.
Why choose WEISHIDAD（VSD） Brushed DC Motor
We are a Brushed DC Motor manufacturers
As a well-known motor manufacturer in China, VSD has strong production capacity and research and development strength. The company's motor factory covers an area of more than 10,000 square meters, with more than 500 front-line employees and more than 100 management personnel, including 25 senior R & D personnel. The team is committed to continuous innovation and develops a new motor every two months on average to meet market demand.
VSD produces 4.5 million motors per month (including brushed DC motors), demonstrating its efficient production capacity. The company not only has advanced production equipment, but also ensures high quality output of products to meet the needs of customers around the world through scientific management concepts and process optimization.
Professional Brushed DC Motor suppliers
As a professional brushed DC motor supplier, VSD not only provides products, but also brings a full range of solutions to customers. The company has a group of well-trained international sales team, who not only understand the needs of customers, but also make professional suggestions according to market changes to ensure you get the best product selection.
VSD's perfect pre-sale, sale and after-sales service system ensures that every customer's inquiry can be answered quickly within 24 hours. In terms of delivery time, VSD performs well, usually within 3-7 days to complete the sample production, the overall delivery accuracy is as high as 95%. This kind of efficient service and precise time management help customers to take the initiative in the project schedule.
Customized design and OEM/ODM service
VSD not only provides standard products, but also can customize the design according to the specific needs of customers to meet the needs of various special applications. Whether it is product shape, performance parameters or special functions, VSD can tailor motor solutions for customers. In addition, VSD provides OEM and ODM services to help customers create unique products and maintain a competitive edge in the market.
Note: Because we are both a manufacturer and a supplier, there is no middleman to make a profit. Please leave your contact information and requirements, and we will give you the latest and most favorable price in the shortest time.