Brushed DC motors are one of the most common types of motors and are widely used in low power and high starting torque demand scenarios such as automotive, heavy machinery and industrial equipment and other applications. Faced with so many choices on the market, it can be challenging to determine the best brushed DC motor for your needs. Considering factors such as speed, torque, duty cycle, load compatibility and maintenance requirements can help you make an informed choice.
Determine voltage, speed, and torque requirement
When selecting a DC motor, you first need to determine the voltage requirements to narrow down your choices. DC motors typically operate in a voltage range of 1.5V to 48V, depending on the power and performance required. Speed is critical in motion control, and the rated or loaded speed indicates how fast the motor will run after a load is applied. Torque is the amount of load that the motor output shaft can overcome, and is directly related to speed. Knowing the rated torque and stall torque (or peak torque) will help you select the right motor or gear motor for your needs, allowing for an efficient application.
Size and performance consideration
The three factors above (voltage, speed, and torque) will help you find the right brushed DC motor initially. Next, you’ll need to further narrow down your choices based on the specific requirements of your system. Generally, the larger the motor, the greater its power and torque. Motors typically range in diameter from 8 to 25 mm and in length from 16.6 to 67.2 mm. However, system space constraints may require you to make a trade-off between size, power, and torque, so you may need to adjust your torque, speed requirements, or budget when selecting a motor.
Define your work cycle
The duty cycle determines which motor type is best for your application or equipment. The running time and the downtime, as well as the direction of rotation, are the key factors of the duty cycle. Most industrial applications recommend intermittent duty cycles to extend the life of the motor or gear motor. Although continuous use is also acceptable, you need to ensure that the motor is always running at peak efficiency.
Efficiency and performance consideration
To optimize the efficiency and performance of brushed DC motors, focus on the following four areas:
- Motor efficiency: Select high-efficiency motors to reduce energy losses and improve overall performance.
- Load matching: Ensure that the motor’s torque and speed match the load requirements to achieve optimal efficiency.
- Voltage compatibility: Select a motor that operates within the specified voltage range to prevent overheating and extend service life.
- Control system integration: Integrate the motor with a compatible control system to fine-tune performance parameters for optimal efficiency.
Choosing the right motor has a significant impact on the performance and cost of your equipment. Before purchasing, be sure to fully consider voltage, speed, torque, size, and duty cycle. At Kinmore, we offer customers a wide range of brushed DC motors and other motor types, providing reliable, efficient, and high-performance motor solutions for a variety of applications from small equipment to large equipment. Contact us today to learn more about our inventory or for professional help in determining which type of motor you need.
