China supplier Mini Centrifugal Air Blower Fan 70mm 70X20mm Axial Ball Bearing DC 24 12 48 Volt Small Motor Cooling Brushless DC Radial Fan Motor 7020 vacuum pump oil

Product Description

Detailed Product Description:

Mini centrifugal air blower fan 70mm 70x20mm Axial Ball Bearing DC Volt Small motor Cooling Brushless dc radial Fan Motor 7571


   Product Name   DC Centrifugal Fan
   Model   MX7571GBH2
   Size   70*70*20MM
   Operating voltage   24V
   Rated current   0.5A
   Input power watt   12W
   Speed   9200rpm
   Air Flow   39.9CFM
   Frame and Impeller:    Plastic(94V-0),PBT
   Bearing type   Ball Bearing
   Function Range:   FG RD IP58 IP68 PWM
   Tempetature Range:   -20ºC to +70ºC
   Leadwire:   Red Wire Positive(+),Black Wire Negative(-)
   Usage   For cooling system,medical system, household ventilation system, etc
   Motor:   Impedance Protected and Reverse Polarity Protected
   Expected life:   50000 hours(40ºC);Sleeve bearing 30000 hours(40ºC)
   Allowwable Ambient temperature range:   -10ºC -70ºC(Operating)  -40ºC -70ºC(Storage)
   (non-condensing envieronment)

Additional protection functions can be added: AS automatic lock/start function, slow start function, over current protection,motor lock current protection, reverse connection protection, over voltage protection, PWM, FG, RD, IP55, IP68

FG (speed output signal)
FG function is also commonly referred to as tach out. This function is mainly used to output a square wave signal from the inside of the fan, and the frequency of the signal represents the speed of the fan. Conventional four-stage fan: speed = FG frequency *30. That is, the fan speed can be read by reading the FG signal.
Rd signal (stall alarm function)
The RD function is also known as the alarm signal. RD is low when the fan is running and high when the fan is locked. Judge
whether the fan is in normal operation or locked state by monitoring the RD signal level.
PWM speed regulation function
PWM refers to pulse width modulation. It means that the frequency (period) of the pulse signal is fixed, and the width ratio (duty cycle: that is, the space ratio) of the pulse wave is changed by the size of the input signal (DC). The on cycle and off cycle of the pulse signal are changed to change the speed of the fan, so as to save energy and reduce noise.
Automatic restart
When the fan is locked, the working current of the fan will be cut off automatically, and the fan is in the state of low current, so as to protect the fan from burning due to high current. Another function of auto restart: the fan automatically outputs a
signal to start the fan every certain time. When the fan is not in the locked state, the fan will be updated, started and run normally.
Introduction to waterproof function
1: Glue filling process:IP68 grade The fan runs in water 2 :Vacuum coating process:Ip55-ip68 grade The fan can run with water! The cost is lower than glue filling

Product applications
Our products are widely used in welding machines, inverters, ultrasonic wave equipment, refrigeration industry, cabinets, network cabinets, LED display screens, electromotor soft starters, air cooler industry, automation equipment, testing equipment, humidifier, CHINAMFG equipment, rectification power supply, projectors, reflow machines, high frequency machines, stage lights, water dispensers, power supply industry, UPS power supply, car DVD, amplifiers, mosquito-killer lamp, car seat/auto pillow/seat cushion, switching power supply, car oxygen bar, eliminating static electricity machines,
model airplanes, graphics cards, CPUs, coffee machines, electric toys, beauty instruments, medical equipment, amusement equipment, electronic equipment and more than 60 fields like industrial equipment, life appliances industry, the entertainment industry, the service industry and so on.



Company Profile
HangZhou CHINAMFG technology development co., LTD. (Topfanchina) is a professional manufacturer of dc fans and ac fans of high-tech enterprises. The cooling fan products can be divided into: DC fan, AC fan and EC (AC TO DC) fan. According to the wind direction can be divided into: axial fan, blower fan, cross-flow fan and centrifugal fan; According to size can be divided into: micro fan, micro blower fan and industrial fans; According to the function can be divided into: reversible fan, high temperature fan, waterproof fan, temperature-control fan, environmental protection fan. Cooling fans are widely used in automobile, home appliances, network communication, medical equipment, unmanned aerial vehicle, air purification, monitoring equipment, chassis, LED lighting, office equipment, mechanical equipment, emerging intelligent products and other fields.
HangZhou CHINAMFG technology development co., LTD, has the abundant and skilled technician , with professional R&D team, sophisticated testing equipment, advanced production-line, scientific production management and rich experience in research and development to customize, developed various types of low noise, strong air volume, high performance and long life of the product, and through the CE, RoHS, UL, TUV certification, are exported to Europe, North America, Asia, Africa and other regions.


Delivery and packages
We can arrange the delivery and package according to your requirements. You can choose the delivery way and forwarder by yourself.elivery time:
1.samples are within 7 days. (free samples are within 2pcs)
2.Products within 5000pcs are 7-10 working days
3.Products above 5000pcs are 10-20 working daysDelivery way:
1. International express: UPS / DHL / FEDEX and so on .
2. By forwarder


Q1 Why choose us?
A1 Topfan-China is a professional manufacturer of dc fans and ac fans of high-tech enterprises. has the abundant and skilled technician, with professional R&D team, sophisticated testing equipment, advanced production-line, scientific production management and rich experience in research and development. We can provide you the soonest reply within 24 hours after you send us an inquiry.
Q2 Are we trader or producer?
A2 We are both a trader and a producer, because we have our own factory and brand.
Q3 How long is our delivery time? 
A3 Generally speaking, in 15 days after receiving your advance payment, the specific delivery time depends on the items and the quantity of your order.
Q4 OEM/ODM Service? 
A4 If your purchase quantity reaches a certain quantity, we can also OEM/ODM.
Q5 What is our MOQ? 
A5 The minimum order quantity depends on the items and the quantity of your order., the exact quantity can be communication, we can provide samples.
Q6 What is our products standards? 
A6 First, according to Chinese standards, and then international export standards, and through the CE, RoHS, UL, TUV certification.
Q7 What is your terms of payment? 
A7 T/T, Western Union 70% as deposit, and 30% before delivery. We’ll show you the photos of the products and packages before you pay the balance.
Q8 What is your terms of delivery? 
Q9 Accepted Payment Currency? 

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Material: Plastic
Usage: for Experiment, for Air Conditioner, for Manufacture, for Refrigerate
Flow Direction: Axial Flow
US$ 8.0/Piece
1 Piece(Min.Order)


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Return&refunds: You can apply for a refund up to 30 days after receipt of the products.

dc motor

In which applications are DC motors commonly used, and what advantages do they offer?

DC (Direct Current) motors are widely used in various applications due to their versatility, controllability, and specific advantages they offer. Here’s a detailed explanation of the common applications of DC motors and the advantages they provide:

1. Robotics:

DC motors are extensively used in robotics for precise control of movement and manipulation. They provide high torque and speed control, allowing robots to perform tasks with accuracy and efficiency. DC motors enable robotic arms, grippers, and mobile robots to execute complex motions and interact with their environment effectively.

2. Industrial Automation:

In industrial automation, DC motors are employed in conveyors, actuators, and positioning systems. The ability to control the motor speed and torque makes them suitable for applications such as material handling, assembly lines, and CNC machines. DC motors offer precise control over acceleration, deceleration, and positioning, enhancing overall productivity and efficiency in manufacturing processes.

3. Electric Vehicles:

DC motors have been widely used in electric vehicles (EVs) for many years. They are commonly found in electric cars, motorcycles, and scooters. DC motors provide high torque from standstill, enabling efficient acceleration and smooth operation. They also offer regenerative braking capabilities, which help in energy recovery during deceleration, thereby increasing the vehicle’s overall efficiency.

4. Appliances:

DC motors are utilized in various household appliances, including fans, blenders, vacuum cleaners, and refrigerators. Their controllable speed and torque allow for efficient operation and improved energy consumption. In appliances where variable speed control is required, such as ceiling fans or blender settings, DC motors offer precise adjustment options to meet different user preferences.

5. Renewable Energy Systems:

DC motors play a crucial role in renewable energy systems, such as wind turbines and solar tracking systems. They convert the rotational energy from wind or sunlight into electrical energy. DC motors enable precise tracking of the sun’s movement for optimal solar energy collection and efficient conversion of wind energy into electricity.

6. Advantages of DC Motors:

DC motors offer several advantages that make them suitable for various applications:

  • Precise Speed Control: DC motors provide accurate and adjustable speed control, allowing for precise regulation of motor output.
  • High Starting Torque: DC motors deliver high torque at startup, making them suitable for applications requiring quick acceleration or heavy loads.
  • Controllability: DC motors can be easily controlled using voltage regulation, current limiting, and feedback control techniques.
  • Efficiency: DC motors have high efficiency, especially when operating at lower speeds.
  • Reliability: DC motors are known for their robustness and reliability, requiring minimal maintenance.
  • Compact Size: DC motors are available in various sizes and can be designed compactly, making them suitable for applications with space constraints.

These advantages make DC motors an attractive choice in various industries and applications where precise control, high starting torque, and reliability are essential.

dc motor

What role does commutation play in the operation of a DC motor?

In the operation of a DC (Direct Current) motor, commutation plays a crucial role in ensuring the continuous rotation of the motor and the conversion of electrical energy into mechanical motion. It is the process by which the direction of the current in the armature winding is periodically reversed to maintain a constant torque and facilitate the rotation of the motor. Here’s a detailed explanation of the role of commutation in the operation of a DC motor:

Commutation is necessary in a DC motor because the magnetic field generated by the armature winding needs to be constantly aligned with the stator’s magnetic field for efficient torque production. The stator of a DC motor typically consists of permanent magnets or electromagnets that create a fixed magnetic field. The armature winding, located on the rotor, produces a magnetic field that interacts with the stator’s field to generate torque.

The commutation process is achieved through the use of a commutator and brushes. The commutator is a cylindrical ring with multiple segments, while the brushes are conductive contacts that make physical contact with the commutator segments. The armature winding is connected to the commutator, and as the rotor spins, the brushes maintain contact with different segments.

As the rotor rotates, the commutator and brushes ensure that the direction of the current in the armature winding is reversed at specific intervals. This reversal of current flow is necessary to maintain a consistent torque in the same rotational direction. Without commutation, the torque generated by the motor would fluctuate in both magnitude and direction, leading to instability and erratic motor behavior.

The commutation process involves two stages: mechanical commutation and electrical commutation.

1. Mechanical Commutation: As the rotor rotates, the brushes make contact with different segments of the commutator. The segments are insulated from each other to prevent short circuits. When the brushes move from one segment to another, the current flowing through the armature winding is switched to a different coil or set of coils. This mechanical switching ensures that the magnetic fields produced by the winding are properly aligned with the stator’s field, resulting in continuous torque production.

2. Electrical Commutation: The reversal of current in the armature winding is achieved through electrical commutation. When the brushes make contact with a new commutator segment, the current flow in the winding is redirected to maintain the desired torque direction. The timing and sequence of the current reversal are critical to ensure smooth and efficient motor operation.

The commutation process in a DC motor is a dynamic and continuous operation. It allows for the conversion of electrical energy into mechanical motion by providing a consistent torque output. The efficiency and performance of the motor are greatly influenced by the quality and effectiveness of the commutation process.

In summary, commutation plays a vital role in the operation of a DC motor by ensuring the continuous rotation of the motor and the production of consistent torque. It involves the mechanical and electrical switching of the current direction in the armature winding, facilitated by the commutator and brushes.

dc motor

Are there innovations or emerging technologies in the field of DC motor design?

Yes, there have been several innovations and emerging technologies in the field of DC (Direct Current) motor design. These advancements aim to improve the performance, efficiency, reliability, and overall capabilities of DC motors. Here’s a detailed explanation of some notable innovations and emerging technologies in DC motor design:

1. Brushless DC Motors:

One significant advancement in DC motor design is the development and widespread adoption of brushless DC motors (BLDC motors). Unlike traditional DC motors that use brushes for commutation, BLDC motors employ electronic commutation through the use of permanent magnets and motor controller circuits. This eliminates the need for brushes, reducing maintenance requirements and improving overall motor efficiency and lifespan. BLDC motors offer higher torque density, smoother operation, better speed control, and improved energy efficiency compared to conventional brushed DC motors.

2. High-Efficiency Materials:

The use of high-efficiency materials in DC motor design has been an area of focus for improving motor performance. Advanced magnetic materials, such as neodymium magnets, have allowed for stronger and more compact motor designs. These materials increase the motor’s power density, enabling higher torque output and improved efficiency. Additionally, advancements in materials used for motor windings and core laminations have reduced electrical losses and improved overall motor efficiency.

3. Power Electronics and Motor Controllers:

Advancements in power electronics and motor control technologies have greatly influenced DC motor design. The development of sophisticated motor controllers and efficient power electronic devices enables precise control of motor speed, torque, and direction. These technologies have resulted in more efficient and reliable motor operation, reduced energy consumption, and enhanced motor performance in various applications.

4. Integrated Motor Systems:

Integrated motor systems combine the motor, motor controller, and associated electronics into a single unit. These integrated systems offer compact designs, simplified installation, and improved overall performance. By integrating the motor and controller, issues related to compatibility and communication between separate components are minimized. Integrated motor systems are commonly used in applications such as robotics, electric vehicles, and industrial automation.

5. IoT and Connectivity:

The integration of DC motors with Internet of Things (IoT) technologies and connectivity has opened up new possibilities for monitoring, control, and optimization of motor performance. By incorporating sensors, actuators, and connectivity features, DC motors can be remotely monitored, diagnosed, and controlled. This enables predictive maintenance, energy optimization, and real-time performance adjustments, leading to improved efficiency and reliability in various applications.

6. Advanced Motor Control Algorithms:

Advanced motor control algorithms, such as sensorless control and field-oriented control (FOC), have contributed to improved performance and efficiency of DC motors. Sensorless control techniques eliminate the need for additional sensors by leveraging motor current and voltage measurements to estimate rotor position. FOC algorithms optimize motor control by aligning the magnetic field with the rotor position, resulting in improved torque and efficiency, especially at low speeds.

These innovations and emerging technologies in DC motor design have revolutionized the capabilities and performance of DC motors. Brushless DC motors, high-efficiency materials, advanced motor control techniques, integrated motor systems, IoT connectivity, and advanced control algorithms have collectively contributed to more efficient, reliable, and versatile DC motor solutions across various industries and applications.

China supplier Mini Centrifugal Air Blower Fan 70mm 70X20mm Axial Ball Bearing DC 24 12 48 Volt Small Motor Cooling Brushless DC Radial Fan Motor 7020   vacuum pump oil	China supplier Mini Centrifugal Air Blower Fan 70mm 70X20mm Axial Ball Bearing DC 24 12 48 Volt Small Motor Cooling Brushless DC Radial Fan Motor 7020   vacuum pump oil
editor by CX 2024-04-11