1/4 HP Brushless Motors
Last Updated: January 16, 2025 Reviewed by: Jon Lowy, consulting engineer
Description
A 1/4 HP brushless motor is an electric motor that operates without the use of brushes, which are typically used in traditional DC motors for commutation. This motor is designed to deliver a specific power output of 1/4 horsepower, making it suitable for applications that require moderate power levels. The motor is characterized by its ability to provide efficient and reliable performance with reduced mechanical noise and maintenance requirements.
Working Principle
Brushless motors operate by using electronic commutation instead of mechanical brushes. The motor consists of a stator with wire-wound poles and a rotor made of permanent magnets. The electronic controller supplies a DC power source to the stator coils, creating a rotating magnetic field. This field interacts with the permanent magnets on the rotor, causing it to rotate. The synchronous nature of the motor ensures that the magnetic fields of the stator and rotor rotate at the same frequency, eliminating the slip seen in induction motors. This design results in high efficiency, greater torque, and superior power density, making brushless motors particularly useful in applications where these attributes are critical .
Applications
Brushless motors are widely used in various applications due to their efficiency and reliability. Specific examples include their use in electric vehicles, where they provide traction capabilities, and in robotics, where precision and control are paramount. They are also employed in precision instrumentation and engraving tools, where their ability to maintain consistent speed and torque is advantageous .
Advantages over other Brushless Motors
One of the key advantages of brushless motors over their brushed counterparts is the absence of brushes, which eliminates the need for maintenance related to brush wear. This results in a longer lifespan and higher reliability. Additionally, brushless motors do not produce arcing, making them dust-free and reducing electrical noise. They also offer improved heat dissipation due to the static winding attached to the motor housing, which enhances their overload capability .
Limitations
While brushless motors offer many advantages, they also have limitations. One specific limitation is the initial cost, which can be higher compared to brushed motors due to the complexity of the electronic commutation system. Additionally, the requirement for an electronic controller can add to the overall system cost and complexity .
Considerations
When considering the use of a 1/4 HP brushless motor, several factors should be taken into account. The initial cost may be higher than that of brushed motors, but the long-term savings in maintenance and operating expenses can offset this. Brushless motors are known for their durability and accuracy, making them a reliable choice for applications requiring consistent performance. However, the need for an electronic controller should be factored into the overall cost and complexity of the system. Replacement and maintenance costs are generally lower due to the absence of brushes, but the electronic components may require periodic inspection and potential replacement .
from Bodine Electric Company
Totally enclosed, non-ventilated (IP-44). Plug-in connectors facilitate electrical connections. Electronic commutation provides quiet operation and low electro-magnetic interference (EMI) while eliminating brush maintenance and contamination from brush dirt. Molded hall sensor assembly for accurate... [See More]
- Output Power: 1/4 HP
- DC Voltage Range: 130.0
- Motor Type: DC Motor
- Torque Constant: 51
from Bodine Electric Company
Brushless motor for high torque, smaller size, and no maintenance. Unvented gearhousing. Industrial lip type seals on motor and output shafts. Needle bearings on output shaft for increased radial load capacity and long life. Permanently lubricated gearing utilizing semi-fluid grease for long life. [See More]
- Output Power: 1/4 HP
- DC Voltage Range: 130.0
- Motor Type: DC Motor
- Output Power: 0.2500
from Bodine Electric Company
All 34B-E or -F gearmotors in this series were uppgraded from -E/-F gearing to the new and improved (stronger) -FX gearing (electrical specs of the motors, and physical dimensions are not affected). Brushless motor for high torque, smaller size, and no maintenance. Unvented gearhousing for universal... [See More]
- Output Power: 1/4 HP
- DC Voltage Range: 130.0
- Motor Type: DC Motor
- Output Power: 0.2500
from Bodine Electric Company
Video Tutorial: Connecting for Local or Remote Operation. The 34B motor provides high starting torque, adjustable speed, and linear speed-torque characteristics. Brushless DC (EC) motors require zero maintenance. Standard 12 VDC and 24 VDC models. All gearmotors are TENV. Unvented gearhousing. [See More]
- Output Power: 1/4 HP
- Standard DC Voltage: 24V
- Motor Type: DC Motor
- DC Voltage Range: 24.0
from Groschopp, Inc.
Low noise, long life. Groschopp BLDC Motors are rated for 130 degrees C continuous internal temperature. High-efficiency synthetic oil lubricant. Hardened output shaft. Ball bearings. Multiple mounting positions. Rugged cast housing [See More]
- Output Power: 1/4 HP
- AC Motor Features: Reversible (optional feature)
- Motor Type: DC Motor
- DC Voltage Range: 163.0
from Jingjiang Nair Motion Technologies Co., Ltd.
JingJiang Nair Motion Technologies Co., Ltd.. have design, manufacturing and logistics facilities in China. They manufacture a wide range of DC gear motors, brushless DC motors and stepper motors which can be engineered to meet your exact requirements. They focus all of their product, application... [See More]
- Output Power: 1/4 HP
- Standard DC Voltage: 24V
- Motor Type: DC Motor
- DC Voltage Range: 24.0
from Transmotec
Brushless dc motors in customized or standard configurations. Standard diameters and flange sizes between 22 mm and 86 mm and power ratings up to 650W. Designs and body constructions are square and cylinder shapes. All motors have as standard integral hall sensors. Double ball bearings are used as... [See More]
- Output Power: 1/4 HP
- Standard DC Voltage: 12V; 24V; 48V
- Motor Type: DC Motor
- DC Voltage Range: 12.0 to 48.0
from Nidec Corporation
These are inner rotor type brushless DC motors that achieve high efficiency, long life, and low noise levels. Brushless DC motors are energy-saving DC motors that do not need the commutators and brushes that are the disadvantages of brush motors and provide superior service life, noise levels,... [See More]
- Output Power: 1/4 HP; 300 W; 1/2 HP
- Standard DC Voltage: 9V; 12V; 24V; 48V; 72V; 90V; 160V
- Motor Type: DC Motor
- DC Voltage Range: 8.0 to 565.0
from Kollmorgen Corporation
The new generation of synchronous servo motors, announced at the end of September 2017, initially features six design sizes with performance levels between 0,3 and 10 kW. The AKM2G servo motors are available with different feedback system choices, mounting /shaft options, connector designs, thermal... [See More]
- Output Power: 1/4 HP; 300 W; 1/2 HP; 1 HP; 2 HP; 5 HP / 3.6 KW
- AC Construction: Synchronous
- Motor Type: AC Servo
- AC Voltage & Frequency: 400 VAC; 120V/60Hz; 208-230/240V 60Hz; 460/480V/60Hz
from Genteq
ECM 142R is the next generation of high-efficiency, fractional-horsepower outdoor motors. 142R is ideally suited to outdoor applications such as split system outdoor units, package units, or any other prop fan air-moving that requires a 1/5, 1/3, 1/2 or 3/4 horsepower, 300-1200 RPM motor. [See More]
- Output Power: 1/4 HP; 300 W; 1/2 HP
- DC Construction: ECM
- Motor Type: AC Motor
- Output Power: 0.2000 to 0.7500
from H2W Technologies
Limited Angle Torque Motors are ideal for compact, limited angular excursion ( <180 º), rotary, closed loop servo applications. Unlike conventional rotary brush and brushless motors, the torquers are wound in such a way that no commutation is required for motion to occur. The result is a... [See More]
- Output Power: 1/4 HP
- DC Construction: Toroidally Wound Iron Core; Permanent Magnet
- Motor Type: DC Motor
- Output Power: 0.0322 to 0.2774
from Pittman Motors
PITTMAN ® instrument grade brushless DC servo motors are IP42 rated construction or greater and include a wide range of rated torques and speeds in a compact design. The brushless construction for extended life, low cogging, and smooth low speed performance make these motors ideal for a... [See More]
- Output Power: 1/4 HP
- Standard DC Voltage: 24V; 48V; 72V
- Motor Type: Servomotor
- DC Voltage Range: 15.2 to 76.4
from Assun Motor Pte. Ltd.
BLDC Motor applied NdFeb permanent magnet which provide high power density and efficiency up to 90%,knitted rhombic winding creats no cogging, low inertia and smooth running even at very low speed,integrated hall sensor can be used for position control,Operated by PWM enable it easy to adjust... [See More]
- Output Power: 1/4 HP
- DC Construction: Permanent Magnet
- Motor Type: DC Motor
- Standard DC Voltage: 12V; 24V
from Aerotech, Inc.
Design Features. Standard NEMA frame sizes. Rare-earth magnets maximize performance. Skewed stator design minimizes torque ripple and cogging for smooth velocity control over a wide speed range. Optional IP65-level construction allows use in harsh environments. Optional brake, front shaft seal, and... [See More]
- Output Power: 1/4 HP; 300 W; 1/2 HP; 1 HP; 2 HP; 5 HP / 3.6 KW
- DC Construction: Permanent Magnet
- Motor Type: Servomotor
- Standard DC Voltage: 90V; 160V
from Jingjiang Nair Motion Technologies Co., Ltd.
JingJiang Nair Motion Technologies Co., Ltd.. have design, manufacturing and logistics facilities in China. They manufacture a wide range of DC gear motors, brushless DC motors and stepper motors which can be engineered to meet your exact requirements. They focus all of their product, application... [See More]
- Output Power: 1/4 HP
- Standard DC Voltage: 24V
- Motor Type: DC Motor
- DC Voltage Range: 24.0
from Kollmorgen Corporation
The RBE Series from Kollmorgen is a proven platform offering many years of direct drive motor solutions in various industries such as defense, semiconductor, machine tools, industrial automation, medical, and robotics. The frameless configuration is provided as a rotor and stator component that are... [See More]
- Output Power: 1/4 HP; 300 W; 1/2 HP; 1 HP; 2 HP; 5 HP / 3.6 KW
- Output Power: 0.0188 to 4.95
- Motor Type: DC Motor
- Continuous Current: 1.79 to 29.6
from Aerotech, Inc.
Design Features. Slotless, brushless stator design provides zero cogging torque for unsurpassed velocity control. Smoother velocity than with standard DC brush-type motors with the advantage of reliable brushless technology. Standard NEMA frame sizes. Ultra-high resolution capability with amplified... [See More]
- Output Power: 1/4 HP; 300 W; 1/2 HP
- DC Construction: Permanent Magnet
- Motor Type: Servomotor
- DC Voltage Range: 340.0
from Jingjiang Nair Motion Technologies Co., Ltd.
JingJiang Nair Motion Technologies Co., Ltd.. have design, manufacturing and logistics facilities in China. They manufacture a wide range of DC gear motors, brushless DC motors and stepper motors which can be engineered to meet your exact requirements. They focus all of their product, application... [See More]
- Output Power: 1/4 HP; 300 W; 1/2 HP
- Standard DC Voltage: 48V
- Motor Type: DC Motor
- DC Voltage Range: 48.0
from Kollmorgen Corporation
Kollmorgen has designed custom solutions for challenging environments since our founding in 1916. The most notable were the motors used in Jason Jr., the ROV that was used to explore the Titanic. The culmination of these experiences has been leveraged in the AKMH series of motors. Designed for food... [See More]
- Output Power: 1/4 HP; 300 W; 1/2 HP; 1 HP; 2 HP; 5 HP / 3.6 KW
- Torque Constant: 14.16 to 387
- Motor Type: Servomotor
- Output Power: 0.2412 to 7.64
from Aerotech, Inc.
Design Features. Slotless, brushless ring motors with high torque output and zero cogging. Frameless design for easy integration into OEM machines. Various winding options available. Includes Hall effect sensors for commutation [See More]
- Output Power: 1/4 HP; 300 W; 1/2 HP; 1 HP
- DC Construction: Permanent Magnet; Coreless / Slotless
- Motor Type: DC Motor
- Standard DC Voltage: 160V
from Jingjiang Nair Motion Technologies Co., Ltd.
JingJiang Nair Motion Technologies Co., Ltd.. have design, manufacturing and logistics facilities in China. They manufacture a wide range of DC gear motors, brushless DC motors and stepper motors which can be engineered to meet your exact requirements. They focus all of their product, application... [See More]
- Output Power: 1/4 HP; 300 W; 1/2 HP; 1 HP
- Standard DC Voltage: 24V; 48V; 72V; 90V; 160V
- Motor Type: DC Motor
- DC Voltage Range: 24.0 to 310.0
from Kollmorgen Corporation
Kollmorgen AKM ™ servo motors give you unprecedented choice and flexibility, with more than 500,000 standard products and practically unlimited co-engineered modifications. Selecting the right-fit motor —optimized for your specific application requirements —has never been easier. [See More]
- Output Power: 1/4 HP; 300 W; 1/2 HP; 1 HP; 2 HP; 5 HP / 3.6 KW
- AC Construction: Synchronous
- Motor Type: AC Servo
- AC Voltage & Frequency: 400 VAC; 120V/60Hz; 208-230/240V 60Hz; 460/480V/60Hz
from Jingjiang Nair Motion Technologies Co., Ltd.
JingJiang Nair Motion Technologies Co., Ltd.. have design, manufacturing and logistics facilities in China. They manufacture a wide range of DC gear motors, brushless DC motors and stepper motors which can be engineered to meet your exact requirements. They focus all of their product, application... [See More]
- Output Power: 1/4 HP; 300 W; 1/2 HP; 1 HP
- Standard DC Voltage: 12V; 24V; 48V; 72V; 90V; 160V
- Motor Type: DC Motor
- DC Voltage Range: 12.0 to 310.0
from Kollmorgen Corporation
Kollmorgen AKM ™ Washdown and Washdown Food Series motors are available in frame sizes 2 through 6. These innovative motors incorporate our industry-leading AKM electromagnetics within a housing protected by a 2-K coating and IP67-rated seal configuration. Stainless steel hardware is used on... [See More]
- Output Power: 1/4 HP; 300 W; 1/2 HP; 1 HP; 2 HP; 5 HP / 3.6 KW
- AC Voltage & Frequency: 400 VAC; 120V/60Hz; 208-230/240V 60Hz; 460/480V/60Hz
- Motor Type: AC Servo
- Torque Constant: 14.16 to 425