DC motor voltage level analysis: how to choose 12V, 24V, 36V, 48V

 

When choosing a DC motor, many people first focus on intuitive parameters such as power, speed, and torque, but easily overlook another equally important factor - voltage level.

 

In fact, the voltage level of a DC motor not only affects the performance of the motor itself, but also directly determines the power supply architecture, wire specifications, controller design, and even affects the cost and reliability of the entire system.

 

Simply put, if the voltage is chosen incorrectly, at best the efficiency will be reduced and heat will be severe, at worst it will lead to system instability, shortened lifespan, and even safety issues.

 

Especially in B-side application scenarios, such as medical equipment, industrial automation, AGV logistics carts, etc., the reliability requirements for the motor power supply system are extremely high. Therefore, the rationality of the voltage specifications must be carefully considered at the initial stage of selection.

 

So what is the relationship between voltage level and motor performance? What scenarios are the common 12V, 24V, 36V, and 48V DC motors suitable for? Next, we will analyze them one by one. (Of course, these are not absolute, and most of the time it depends on the actual application situation)

 

 

In a DC motor system, there is a close relationship between voltage, current, and power. Usually, we can understand it with the following simple formula:

Power (W) = voltage (V) × current (A)

 

From the formula:

When the power is constant, increasing the voltage can reduce the current.

Conversely, if the voltage is low, to achieve the same power, the current must be increased.

 

So, what problems will large current bring?

Increased heat generation: The greater the current, the greater the loss in the wire and the motor (calculated according to P=I²R), and the motor is more likely to heat up.

Thicker wires: To safely transmit large currents, thicker and heavier cables are required, increasing costs and installation difficulty.

Increased pressure on power supplies and controllers: High current means that power supplies and controllers must be designed with higher specifications, increasing system costs.

 

Therefore, in medium and high power applications, choosing to appropriately increase the voltage can effectively reduce the current and improve system efficiency and stability.

 

In low-power applications (such as small robots and portable devices), low-voltage (such as 12V) systems are still the mainstream due to low power requirements. They are simple, safe, and easy to be powered by batteries.

 

 

12V DC motor: the first choice for small portable devices

Features:

Low voltage, safe to use, suitable for direct battery drive

The system is lightweight and easy to move and carry

The current is relatively large, suitable for small power requirements

 

Typical applications:

Small robots, smart cars, model toys

Portable medical devices (such as suction devices, infusion pumps)

· In-vehicle equipment (e.g. seat adjusters, automatic windows)

Summary of applicable scenarios: emphasis on safety, low power and portability.

 

24V DC motor: commonly used in light industry and high-performance equipment

Features:

Compared with 12V, the power is increased and the current is reduced

Can still be powered by common battery packs

· Balance performance and system cost

 

Typical applications:

· Power tools (electric drill, electric wrench)

Medical equipment (electric hospital beds, operating table lifting systems)

Medium-sized robots, automated guided vehicles (AGVs)

Summary of applicable scenarios: small and medium-sized applications that require a certain load capacity and have certain requirements for portability and efficiency.

 

36V DC motor: a balanced choice between performance and battery life

Features:

· Further power improvement, suitable for medium to large loads

· Widely used in electric vehicles and logistics equipment

Suitable for applications with longer endurance and higher torque requirements

 

Typical applications:

Electric bicycles, electric scooters

Small logistics vehicles, warehouse robots

Medium-sized industrial automation equipment

Summary of applicable scenarios: Focus on endurance and power, and are used in small-scale transportation and logistics fields that require medium to high-speed operation.

 

48V DC Motors: A Popular Choice for Industrial Applications

Features:

Within the safe voltage range, the output power can be very large

Low current and high power, reducing cable and controller costs

Widely used in heavy-load and long-term industrial scenarios

 

Typical applications:

Heavy-duty AGV, AMR mobile robots

Electric forklift, electric stacker

Drive device in industrial automation line

Summary of applicable scenarios: Industrial environments that require high torque, high load, and long-term continuous operation are very suitable for using 48V DC motors.

 

In order to facilitate quick selection, the following is a comparison of the typical characteristics and applicable scenarios of DC motors of different voltage levels:

Voltage level	Main Features	Applicable scenarios	Suitable for customer type
12V	Low voltage, high safety, portable, easy to power	Toy models, smart cars, portable medical equipment	Robot development, small equipment manufacturer
24V	Moderate voltage, high efficiency, moderate power	Power tools, medical lifting equipment, AGV trolleys	Industrial automation equipment, medical equipment companies
36V	Balance performance and battery life, suitable for medium loads	Electric bicycles, warehouse robots, logistics equipment	Customers in the fields of transportation equipment, warehousing and logistics
48V	High power, high torque, suitable for heavy load and continuous operation	Industrial AGV, electric forklift, automated production line	Heavy industrial automation, intelligent manufacturing enterprises

 

Tips: The above is a general reference . Generally , the higher the voltage, the better the system efficiency , but it also has higher requirements for controller and battery management. It is recommended to consider the actual load, power supply conditions and usage environment when choosing.

 

 

The voltage level of a DC motor is not only related to power output and load capacity, but also directly affects the efficiency and stability of the entire system. When selecting a model, it is necessary to consider not only the working requirements of the equipment, but also the compatibility of the power supply environment and the control system.

 

If you want to quickly find the most suitable solution for your project among 12V, 24V, 36V or 48V DC motors, or need to customize high-torque, high-efficiency DC motors, please contact VSD DC motor manufacturer.

 

We have a rich product line and a professional team of engineers, and can provide B-side customers with selection guidance, customized design and technical support to help your equipment achieve optimal performance!

 

 

VSD is an innovative manufacturer specializing in the field of DC motors, committed to providing high-performance and high-reliability motor solutions to customers around the world.

We have advanced production equipment, a complete quality management system (ISO certified), and have accumulated a number of DC motor design and manufacturing patents.

 

Our strengths include:

· Rich standard DC motor product line (12V, 24V, 36V, 48V and customized voltage)

High torque, low noise, long life motor design

Support OEM/ODM customization to meet the application needs of various industries

· Rapid response technical support and after-sales service

· International cooperation experience, products are exported to Europe, America, Southeast Asia and other regions

Whether you are looking for a standard model or need one tailored to your project needs, VSD can protect your business.

Welcome to contact us and drive the future together!