A planetary gear motor combines a micro planetary gearbox with a DC motor, serving as a driving device designed to reduce speed and increase torque. These motors are typically cylindrical and made from materials such as steel or brass. In some cases, plastic components are used to meet specific size and power requirements.
As a leading manufacturer of planetary gear motors, TSL Motors offers DC planetary gear motors with diameters ranging from 6mm to 42mm, with the smallest diameter being 6mm. Our motors operate within a rated voltage range of 2V DC to 24V DC, and output speeds can vary from 5rpm to 2000rpm. Torque is another key consideration for determining the suitability of a motor for your application. We offer torque ranges from 5.0 g.cm to 50.0 kg.cm, and in recent years, we have successfully developed higher torque solutions for our customers. A representative product of ours is the 12V DC motor, which offers high torque at low RPM. While our product line continues to expand, most of our planetary gear motors fall within this torque range.
The planetary gear motor is an epicyclic gear system that decreases output speed by using a small planetary gearbox.
Key components of a planetary gear motor include the sun gear, planet gears, ring gear, planet carrier, and the driving motor. This design is akin to the orbital movement of planets around the sun in our solar system. In the gear train, three or more “planet” gears rotate around the sun gear, with the sun gear acting as the central drive element. When a gear motor is built using this arrangement, it is referred to as a DC planetary gear motor.
In this setup, the planet gears rotate along the ring gear, and the planet carrier is connected to the output shaft. This results in the desired output motion and speed reduction.
To achieve higher reduction ratios or greater torque, multiple stages of planetary gears can be combined. This allows for doubling the reduction ratio or increasing torque accordingly.
Planet gears distribute the load torque, which helps reduce wear and stress on the components. This feature allows planetary gear motors to transmit substantial power without causing damage to the gears, ensuring long-lasting durability and efficient performance.
A planetary gear motor operates by reducing the speed of a high-speed rotating DC motor or other power sources. This is achieved by meshing a smaller gear with fewer teeth on the input shaft of the planetary gearbox with a larger gear on the output shaft, which has more teeth.
By combining gears of different sizes, the output speed of the motor is decreased while the torque is increased. When power is transmitted from the smaller gear to the larger one, the ratio of speed reduction and torque amplification is equal to the gear ratio between the two gears. This is referred to as the gear ratio, which is the ratio of the number of teeth on the driven gear to the driving gear.
The torque generated by the motor is directly influenced by the reduction ratio of the gearbox. A higher reduction ratio results in greater torque, while a lower reduction ratio produces less torque.
Gear ratio = Driven gear teeth / Driving gear teeth
Gear ratio = Input speed / Output speed
With over 10 years of expertise as a planetary gear motor manufacturer, we are committed to meeting our customers’ needs by continuously expanding our product range to align with market demands.
We offer a variety of motors, including brushed and brushless gear motors, as well as DC motors equipped with planetary gearboxes, such as stepper motors. Our brushed motors come with the option of carbon or metal brushes to suit different applications.
Common customization requests include modifications to the shape and size of the output shaft, the addition of a small gear on the output shaft, lead wires of various lengths, or different connectors for the lead wires. For applications requiring more control, we can also provide planetary gear motors with encoders.
The 12V and 24V planetary gear motors are popular choices in the market and are commonly integrated into customer products. The 775 planetary gear motor, with its larger diameter, is our most powerful gear reduction motor. Since every product is unique, we offer full customization of our planetary gear motors based on your specific requirements. Reach out to us, and our expert engineering team will work to deliver solutions that exceed your expectations.
Simply share your detailed needs, and our engineers will provide a tailored solution perfect for your application.
We are here to assist you throughout the entire process, from prototype development to large-scale, cost-efficient mass production.
Founded in 2009, TSL Motors has been at the forefront of micro DC motor design and manufacturing. With ISO 9001, ISO 14001, and ISO 45001 certifications, TSL is committed to delivering high-quality products that meet international standards.
We offer a wide range of motor solutions, including coin vibration motors,ERM vibration motor, coreless DC motors, Stepper DC Motors,LRA vibration motors, BLDC motors,Brushed DC Motors,Planetary Gear Motors,Spur Gear Motors ,Worm Gear Motor,etc. Our motors are engineered to be cost-effective, reliable, and customizable, catering to various applications across diverse industries.
At TSL, we strive to provide our valued customers with innovative solutions tailored to their specific needs.
Designing motors and mechanisms for a diverse array of industrial, medical, and consumer applications.
Our skilled sales engineers are adept at quickly grasping your unique requirements and offering tailored services. These custom services encompass motor performance parameters such as rated voltage, speed, and current, along with additional features like connectors, wire lengths, rubber boots, plastic/metal capsules, brackets, and spring contacts.
We provide comprehensive support, including detailed drawings and specifications, throughout the entire process from prototype development to mass production.
Our motor manufacturing process is designed to be flexible, enabling us to accommodate both large-scale production and specialized, high-value custom builds to meet diverse customer needs.
We use in-house designed dynamometers to thoroughly test and validate every sample and production batch, ensuring the highest standards of quality and performance.
TSL Motor is an ISO 9001:2015 certified company, committed to ensuring that each motor meets your precise specifications and performance standards. We have developed a comprehensive after-sales support system, offering prompt responses to customer inquiries and addressing any issues or needs that may arise. Our commitment doesn’t end with delivery—we are here to support you every step of the way.
The versatility of planetary gear motors has made them essential across various industries and applications:
Their precision and compact design make them ideal for use in robotic joints and mobility systems.
Small planetary DC gear motors are used in drones for motor control and propulsion, powering both main and steering motors.
In the medical field, planetary gear motors are crucial for the accurate operation of equipment like blood analyzers and surgical tools.
Planetary gear motors are used in a range of vehicle systems, such as power windows, seat adjustments, and sunroof mechanisms.
With multiple gear contacts, these motors distribute the load evenly, minimizing wear and maintaining high efficiency, even at high gear ratios.
Planetary gear motors are versatile and used in a variety of industries, including automotive systems and medical devices.
These motors offer exceptional torque output relative to their size, providing a remarkable power-to-weight ratio.
Their small, efficient design enables integration into confined spaces, making them ideal for miniature applications.
The low backlash characteristic of planetary gears ensures precise control, which is essential in fields like robotics and automation.
The distributed load and meshing of the gears result in a quieter and smoother running motor.
A planetary gear motor is a type of motor that mimics the movement of a planetary system. The input shaft turns a central gear known as the sun gear, which then drives multiple surrounding planet gears. This setup allows the motor to efficiently increase or reduce speed and is commonly used across various industries due to its compact design and high performance.
Planetary gear motors find applications in various fields such as robotics, household appliances, medical devices, and industrial machinery. They are ideal for any application that requires precision, high power density, and efficient performance.
To calculate the RPM of a gearbox, follow these two steps:
Determine the number of teeth on both the input and output gears. Divide the number of teeth on the output gear by the number of teeth on the input gear to find the gear ratio.
Obtain the input speed, typically measured in revolutions per minute (RPM). Multiply the input speed by the gear ratio to find the output speed in RPM.
Planetary DC motors generate high torque because they feature three or more planetary gears in each stage, which increases the amount of tooth contact between the gears. This setup ensures that the torque load is distributed evenly across the multiple planetary gears, allowing them to share the load. The result is a motor that delivers significant torque with smooth and consistent speed transfer due to excellent gear engagement.
Gears increase torque by multiplying the input torque through a gear train, which can either increase torque or decrease speed. When two gears mesh, one turns clockwise while the other rotates in the opposite direction. The output torque is calculated by multiplying the input torque by the gear ratio between the two meshing gears.
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