Technical Resource

Brushed Motors and Brushless Motors

Brushed Motors

These are the traditional variety of DC motors which are used for basic applications where there is a very simple control system. These are used in consumer applications and basic industrial applications. These are classified into four types:

1. Series Wound

2. Shunt Wound

3. Compound Wound

4. Permanent Magnet

In the series wound DC motors, the rotor winding is connected in series with the field winding. Varying the supply voltage will help in controlling the speed. These are used in lifts, cranes, and hoists, etc.

In the shunt wound DC motors, the rotor winding is connected in parallel with the field winding. It can deliver higher torque without any reduction in the speed and increases the motor current. Due to its medium level of starting torque along with constant speed, it is used in conveyors, grinders, vacuum cleaners, etc

In the compound wound DC motors, the polarity of the shunt winding gets added to that of the series fields. It has a high starting torque and runs smoothly even if the load varies smoothly. This is used in elevators, circular saws, centrifugal pumps, etc.

Permanent magnet as the name suggests are used for precise control and lower torque such as robotics.

Brushless Motors

These motors have a simpler design and have a higher life span when used in higher applications. This has little maintenance and high efficiency. These types of motors are used in appliances that use speed and position control such as fans, compressors, and pumps.

Micro Reduction Motor Features

Micro reduction motor features:

1. In no AC place with batteries can also be used.

2. Simple reducer, adjust the deceleration ratio, can be used for deceleration.

3. The speed range is large, the torque is large.

4. The number of turns, if needed, can be customized according to actual needs.

Micro deceleration motor can also be designed according to the special requirements of customers, different shaft, speed ratio of the motor, not only let customers improve the efficiency of the work, but also save a lot of costs.

Micro reduction motor, DC micro motor, gear reduction motor is not only small size, light weight, simple installation, easy maintenance, compact structure, ultra-low tone, smooth work, wide range of output speed selection, strong versatility, efficiency up to 95%. Increased operation life, but also prevent flying dust and external water and gas flow into the motor.

Micro reduction motor, gear reduction motor is simple to maintain, high efficiency, reliability, low wear rate, and the use of environmentally friendly materials, and through the ROHS report. So that customers can be safe and assured to use. Greatly save the customer cost and increase the work efficiency.

Motor FAQs

1. What kind of brush is used in the motor?

There are two kind brushes that we normally use in motor: the metal brush and carbon brush. We choose based on Speed, Current, and lifetime requirements. For quite small motors, we only have metal brushes while for big ones we only have carbon brushes. Compared with metal brushes, the lifetime of carbon brushes are longer since it will reduce the wear on the commutator.

2. What are the noise levels of your motors and do you have very quiet ones?

Normally we define the noise level (dB) based on the back ground noise and measure distance. There are two kind noises: mechanical noise and electrical noise. For the former, it’s related to the Speed and motor parts. For the latter, it’s mainly related to the sparks caused by the friction between the brushes and commutator. There is no quiet motor (without any noise) and only difference is the dB value.

3. Could you offer price list?

For all of our motors, they are customized based on different requirements like lifetime, noise, Voltage, and shaft etc. The price also varies according to annual quantity. So it’s really difficult for us to provide a price list. If you can share your detailed requirements and annual quantity, we’ll see what offer we can provide.

4. Would you mind sending the quotation for this motor?

For all of our motors, they are customized based on different requirements. We will offer the quotation soon after you send your specific requests and annual quantity.

5. What's the lead time for samples or mass production?

Normally, it takes 15-25 days to produce samples; about mass production, it will take 35-40 days for DC motor production and 45-60 days for gear motor production.

6. How much should I pay for samples?

For low cost samples with quantity no more than 5pcs, we can provide them for free with freight paid by buyer (if clients can provide their courier account or arRange courier to pick them up from our company, it’ll be okay with us). And for others, we’ll charge sample cost and freight. It’s not our aim to earn money by charging samples. If it matters, we can make a refund once got the initial order.

7. Is it possible to visit our factory?

Sure. But please kindly keep us posted a few days in advance. We need to check our schedule to see if we are available then.

8. Is there an exact lifetime for the motor?

I am afraid not. The lifetime varies a lot for different Models, materials, and Operating conditions like temp., humidity, duty cycle, input power, and how the motor or gear motor is coupled to the load, etc. And the lifetime we normally mentioned is the time when the motor rotates without any stop and the Current, Speed, and Torque change is within +/-30% of the initial value. If you can specify the detailed requirements and working conditions, we’ll make our evaluation to see which one will be suitable to meet your needs.

9. Do you have any subsidiary or agent here?

We don’t have any subsidiary oversea but we will consider that in the future. We are always interested in coOperating with any worldwide company or individual who would be willing to be our local agents to serve our customers more closely and efficiently.

10. What kind of parameter information should be provided to get a DC motor evaluated?

we know, different shapes determine the size of the space, which means that different sizes can achieve performance such as different Torque values. Performance requirement includes working Voltage, rated load, and rated Speed, while the shape requirement includes the maximum size of the inStallation, out shaft size, and the direction of the terminal.

If the customer has other more detailed requirements, such as Current limit, working environment, service life requirements, EMC requirements, etc., we can also provide a more detailed and accurate evaluation together.

Slotted Brushless and Slotted Brushless Motors

The unique design of slotted brushless and slotted brushless motors has several important advantages:

1. High motor efficiency

2. Ability to withstand harsh environments

3. Long motor life

4. High acceleration

5. High power/weight ratio

6. High temperature sterilization (provided by tank design)

7. These brushless DC motors are particularly suitable for use in environments that require both accuracy and durability.

Hollow cup/coreless motor motor features.

The stator winding adopts cup-shaped winding, without tooth groove effect, and the torque fluctuation is very small.

High performance rare earth NdFeb magnetic steel, high power density, rated output power up to 100W.

All aluminum alloy shell, better heat dissipation, lower temperature rise.

Imported brand ball bearings, high life assurance, up to 20000 hours.

New end cover fuselage structure, ensure the installation accuracy.

Built-in Hall sensor for easy driving.

Suitable for power tools, medical instruments, servo control and other occasions.