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Home / Brushless DC Motor

Brushless DC Motor

What is brushless dc motor?

A brushless direct current motor (BLDC) is a small but powerful type of electric motor that uses direct current as its power source. Because of their size and efficiency, BLDCs are increasing in their popularity and the number of applications they're used for.

 

BesFoc offers a wide range of brushless DC motor products featuring:

  • Output Power from 15 W (1/50 HP) up to 3000 W (4 HP)
  • Motor size from 28mm to 110mm ( Nema 11 to Nema 42)
  • Integrated brushless servo motor (pulse / RS485 / CANopen) options
  • Many different shaft kinds available
    • Spur gearbox, worm gearbox, planetary gearbox available
  • Electromagnetic Brake / Encoder options
  • AC or DC Input Drivers
 

BesFoc brushless dc motor:

As a professional brushless dc motor manufacturer with 13 years in china, BesFoc offer various bldc motors with customized requirements, including 42 57 60 80 86 110 130mm, additionally, gearboxes, brakes, encoders, brushless motor drivers and integrated drivers are optional.
24v brushless motor

Nema17 42BLS series brushless DC motor

Brushless DC motor, power: 20W ~ 110W, rated voltage: 24V, rated speed: 4000rpm, rated torque: 0.0625Nm ~ 0.25Nm
Optional parts: Gearbox, brake, encoder, integrated built-in drivers...
Model Phase Poles Rated Voltage Rated Speed Rated Torque Rated Current Rated Power Body Length Rotor Inertia Driver Weight
Phase Poles Vdc Rpm Nm A W mm g.cm2 / Kg
BF42BLS01 3 8 24 4000 0.0625 1.8 26 41 24 BFBLD120 0.3
BF42BLS02 3 8 24 4000 0.125 3.3 52.5 61 48 BFBLD120 0.45
BF42BLS03 3 8 24 4000 0.185 4.8 77.5 81 72 BFBLD120 0.65
BF42BLS04 3 8 24 4000 0.25 6.3 105 100 96 BFBLD120 0.8
Brushless DC motor

Nema23 57BLS series brushless DC motor

Brushless DC motor, power: 20W ~ 190W, rated voltage: 36V, rated speed: 4000rpm, rated torque: 0.055Nm ~ 0.44Nm
Optional parts: gearbox, brake, encoder, fan, integrated built-in drivers...
Model Phase Poles Rated Voltage Rated Speed Rated Torque Rated Current Rated Power Body Length Rotor Inertia Driver Weight
Phase Poles Vdc Rpm Nm A W mm g.cm2 / Kg
BF57BLS005 3 8 36 4000 0.055 1.2 23 37 30 BFBLD300 0.33
BF57BLS01 3 8 36 4000 0.11 2.0 46 47 75 BFBLD300 0.44
BF57BLS02 3 8 36 4000 0.22 3.6 92 67 119 BFBLD300 0.75
BF57BLS03 3 8 36 4000 0.33 5.3 138 87 173 BFBLD300 1.0
BF57BLS04 3 8 36 4000 0.44 6.8 184 107 230 BFBLD300 1.25
crop_1720877185979

Nema23 57BLF series brushless DC motor

Brushless DC motor, power: 20W ~ 190W, rated voltage: 36V, rated speed: 4000rpm, rated torque: 0.055Nm ~ 0.44Nm
Optional parts: gearbox, brake, encoder, fan, integrated built-in drivers...
Model Phase Poles Rated Voltage Rated Speed Rated Torque Rated Current Rated Power Body Length Rotor Inertia Driver Weight
Phase Poles Vdc Rpm Nm A W mm g.cm2 / Kg
BF57BLF005 3 8 36 4000 0.055 1.2 23 37 30 BFBLD300 0.33
BF57BLF01 3 8 36 4000 0.11 2.0 46 47 75 BFBLD300 0.44
BF57BLF02 3 8 36 4000 0.22 3.6 92 67 119 BFBLD300 0.75
BF57BLF03 3 8 36 4000 0.33 5.3 138 87 173 BFBLD300 1.0
BF57BLF04 3 8 36 4000 0.44 6.8 184 107 230 BFBLD300 1.25
Brushless motor 48v

Nema24 60BLS series brushless DC motor

Brushless DC motor, power: 94W~377W, rated voltage: 48V, rated speed: 3000rpm, rated torque: 0.3Nm ~ 1.2Nm
Optional parts: gearbox, brake, encoder, fan, integrated built-in drivers...
Model Phase Poles Rated Voltage Rated Speed Rated Torque Rated Current Rated Power Body Length Rotor Inertia Driver Weight
Phase Poles Vdc Rpm Nm A W mm kg.cm2 / Kg
BF60BLS01 3 8 48 3000 0.3 2.8 94 78 0.24 BFBLD300 0.85
BF60BLS02 3 8 48 3000 0.6 5.2 188 99 0.48 BFBLD300 1.25
BF60BLS03 3 8 48 3000 0.9 7.5 283 120 0.72 BFBLD750 1.65
BF60BLS04 3 8 48 3000 1.2 9.5 377 141 0.96 BFBLD750 2.05
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80BLS series brushless DC motor

Brushless DC motor, power: 110W~440W, rated voltage: 48V, rated speed: 3000rpm, rated torque: 0.35Nm ~ 1.4Nm
Optional parts: gearbox, brake, encoder, fan, integrated built-in drivers...
Model Phase Poles Rated Voltage Rated Speed Rated Torque Rated Current Rated Power Body Length Rotor Inertia Driver Weight
Phase Poles Vdc Rpm Nm A W mm kg.cm2 / Kg
BF80BLS01 3 8 48 3000 0.35 3 110 78 0.21 BFBLD750 1.4
BF80BLS02 3 8 48 3000 0.7 5.5 220 98 0.42 BFBLD750 2
BF80BLS03 3 8 48 3000 1.05 8 330 118 0.63 BFBLD750 2.6
BF80BLS04 3 8 48 3000 1.4 10.5 40 138 0.84 BFBLD750 3.2
Brushless motor 48v

86BLS series brushless DC motor

Brushless DC motor, power: 110W~660W, rated voltage: 48V, rated speed: 3000rpm, rated torque: 0.35Nm ~ 2.1Nm
Optional parts: gearbox, brake, encoder, fan, integrated built-in drivers...
model Phase Poles Rated Voltage Rated Speed Rated Torque Rated Current Rated Power Body Length Rotor Inertia Driver Weight
Phase Poles Vdc Rpm Nm A W mm kg.cm2 / Kg
BF86BLS58-X002 3 8 48 3000 0.35 3 110 71 0.4 BFBLD750 1.5
BF86BLS71-X001 3 8 48 3000 0.7 6.3 220 84.5 0.8 BFBLD750 1.9
BF86BLS84 3 8 48 3000 1.05 9 330 98 1.2 BFBLD750 2.3
BF86BLS98-X015 3 8 48 3000 1.56 11.5 440 111.5 1.6 BFBLD750 2.7
BF86BLS125-X015 3 8 48 3000 2.1 18 660 138.5 2.4 BFBLD750 4

BLDC motors are composed of three primary parts:

  1. Rotor: The rotating part, typically embedded with permanent magnets.
  2. Stator: The stationary part that contains the motor windings.
  3. Electronic Controller: Manages the commutation by switching current direction in the stator windings.
 

Types of Brushless DC Motors

Brushless DC motors can be categorized based on their construction and commutation methods:

1. Inner Rotor BLDC Motors

In this design, the rotor is located inside the stator. Inner rotor motors are known for their high torque and are commonly used in industrial applications.

2. Outer Rotor BLDC Motors

Here, the rotor is positioned outside the stator, resulting in a compact design with high inertia. These are popular in applications like drones and small appliances.

3. Sensor-Based BLDC Motors

Equipped with sensors (e.g., Hall-effect sensors), these motors provide precise feedback on rotor position, ensuring accurate control.

4. Sensorless BLDC Motors

Sensorless motors rely on back-EMF (Electromotive Force) to determine rotor position. They are more affordable and used in cost-sensitive applications like fans and pumps.

 

How Does a Brushless DC Motor Work?

The operation of a brushless DC motor is based on the interaction between the magnetic field of the stator windings and the permanent magnets of the rotor. Unlike brushed motors, where brushes physically transfer electricity to the rotor, BLDC motors rely on an electronic controller to generate a rotating magnetic field.

 

Steps in BLDC Motor Operation:

  1. Electronic Commutation: The controller alternates current flow between different windings, creating a rotating magnetic field.
  2. Rotor Alignment: The magnetic field of the rotor aligns with the stator's magnetic field, causing rotation.
  3. Sensor Feedback: Sensors such as Hall-effect sensors detect rotor position, ensuring precise commutation.

This seamless process ensures higher efficiency and reduced wear, making BLDC motors ideal for demanding applications.

 

BesFoc Brushless DC Motors has the following main advantages:

(1) With good mechanical characteristics and regulating characteristics, can replace the DC brush motor speed regulation, frequency conversion motor speed regulation, induction motor plus reducer speed regulation. 
(2) Can run at low speed and high power, save the reducer, and directly drive the large load. 
(3) It has many advantages of the traditional DC brush motor, but also eliminates the brush and collector ring structure. 
(4) Excellent torque performance, medium, and low-speed torque performance start torque is large, start current is small. 
(5) Step-less speed regulation, wide speed range, strong overload capacity. 
(6) Small volume, light weight, large output. 
(7) Soft start, soft stop, and good braking characteristics can leave out the original mechanical or electromagnetic device. 
(8) The motor itself has no excitation loss and brush loss, high efficiency, and a good comprehensive power-saving effect. 
(9) High reliability, good stability, strong adaptability, and simple repair and maintenance. 
(10) Vibration resistance, low noise, small vibration, smooth operation, and long life. 
(11) No spark, especially suitable for public places, anti-interference, good safety performance.

 

Brushless dc motor application:

1. Automotive Industry

2. Consumer Electronics

3. Industrial Automation

4. Medical Devices

5. Aerospace and Drones

 

Key Considerations When Choosing a BLDC Motor

When selecting a brushless DC motor for a specific application, it is essential to evaluate the following factors:

Torque and Speed Requirements

Power Efficiency

Size and Weight Constraints

Environmental Conditions

Cost vs. Performance

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