At present, DC brushless blowers

mostly use brushless DC motors, which greatly simplify the structure of brushless DC

motors by eliminating the collector ring and brushes for excitation. It not only

improves the technical performance of the motor, but also greatly improves the

mechanical reliability and life of the motor. Not only that, it also has excellent

control performance compared with other motors. This is because the torque constant,

torque inertia ratio, and power density of the motor have been greatly improved due

to the high performance of permanent magnet materials.

      Through reasonable design, the inertia and electromechanical

time constant can be greatly reduced and greatly improved as the main index of servo

control performance. The design of modern permanent magnet circuit has been improved,

and the coercivity of permanent magnet material is high. As a result, the armature

response and demagnetization resistance of permanent magnet motors have been greatly

improved, and the control parameters of the motors have been greatly reduced under

the influence of external disturbances.

      Since permanent magnet is used instead of electric

excitation, the design of excitation winding and magnetic field is reduced, thus

reducing the parameters such as excitation flux, excitation winding inductance and

excitation current, thus enabling the control variables or parameters to meet the

design requirements. Direct reduction. All these factors can be said that DC

brushless blowers have good controllability.

  DC brushless motors are widely used in daily life, so do you know the

advantages of DC brushless motors, the following I introduce you to the

characteristics of DC brushless motors.

1, no carbon brushes, low interference DC brushless motor in addition to carbon

brushes, the most direct change is that there is no brush geared motor operation

generated by electric sparks, which greatly reduces the interference of electric

sparks to remote radio equipment.

2, low noise, smooth operation DC brushless motor without brushes, friction is

greatly reduced when running, smooth operation, noise will be much lower, this

advantage for brushless geared motor running stability is a huge support.

3, long life, low maintenance costs DC brushless motor less carbon brushes,

brushless geared motor wear is mainly on the bearings, from a mechanical point of

view, brushless geared motor is almost a maintenance-free motor, when necessary, only

need to do some dusting maintenance can be. Brushless DC motor life is generally

between several tens of thousands of hours, while the ordinary brush motor life is

generally between 1000-2000 hours.

4、Energy saving and noise reduction DC brushless motor adopts frequency control

and stepless speed regulation to realize indoor constant temperature control, which

saves energy up to 50% or more than traditional AC fan coils.

The blower is mainly composed of the following six parts: motor, air filter,

blower body, air chamber, base (and oil tank), and drip nozzle. The blower runs

eccentrically by the rotor offset in the cylinder and makes the volume change between

the blades in the rotor slot to suck in, compress and spit out the air. In the

operation of the blower using the pressure difference between the automatic

lubrication to the drip nozzle, drip into the cylinder to reduce friction and noise,

while maintaining the cylinder gas does not flow back, this blower is also known as

the slide blower. The blower's types can be classified acccording to its

applications, including, CPAP blower, Bipap blower, 

ICU

ventilator blower, Purifying respirator blower, 

Air bed blower

, Home appliance

blower, etc.

Application prospects of brushless DC motor

Brushless DC motors have superior performance compared with other types of

motors. Brushless DC motors are widely used in home ventilator motors, oxygen

generators, small medical blowers

and so on. Brushless DC motors have a good application prospect. However,

there are still many problems to be solved and further research is needed. At

present, the development of brushless DC motors has reached a relatively mature

stage, but along with the continuous impact on materials, electronics and control

technology, it is bound to develop in the direction of miniaturization,

digitalization, long life and high reliability, and will certainly play a greater

role in industrial production.

Brushless DC motors are common in industrial applications across the world. At

the most basic level, there are brushed and brushless motors and there are DC and AC

motors. Brushless DC motors, as you may imagine, do not contain brushes and use a DC

current.

These motors provide many specific advantages over other types of electrical

motors, but, going beyond the basics, what exactly is a brushless DC motor? How does

it work and what’s it used for?

How a Brushless DC Motor Works

It often helps to explain how a brushed DC motor works first, as they were used

for some time before brushless DC motors were available. A brushed DC motor has

permanent magnets on the outside of its structure, with a spinning armature on the

inside. The permanent magnets, which are stationary on the outside, are called the

stator. The armature, which rotates and contains an electromagnet, is called the

rotor.

In a brushed DC motor, the rotor spins 180-degrees when an electric current is

run to the armature. To go any further, the poles of the electromagnet must flip. The

brushes, as the rotor spins, make contact with the stator, flipping the magnetic

field and allowing the rotor to spin a full 360-degrees.

A brushless DC motor is essentially flipped inside out, eliminating the need for

brushes to flip the electromagnetic field. In brushless DC motors, the permanent

magnets are on the rotor, and the electromagnets are on the stator. A computer then

charges the electromagnets in the stator to rotate the rotor a full 360-degrees.

What are Brushless DC Motors Used For?
Brushless DC motors typically have an efficiency of 85-90%, while brushed motors

are usually only 75-80% efficient. Brushes eventually wear out, sometimes causing

dangerous sparking, limiting the lifespan of a brushed motor. Brushless DC motors are

quiet, lighter and have much longer lifespans. Because computers control the

electrical current, brushless DC motors can achieve much more precise motion control.

Because of all these advantages, brushless DC motors are often used in modern

devices where low noise and low heat are required, especially in devices that run

continuously. This may include washing machines, air conditioners and other consumer

electronics. They may even be the main power source for service robots, which will

require very careful control of force for safety reasons.

Brushless DC motors provide several

distinct advantages over other types of electric motors, which is why they’ve made

their way into so many household items and may be a major factor in the growth of

service robots inside and outside of the industrial sector.