When it comes to electric motors, one of the most crucial decisions engineers must make is how to manage heat effectively. In many systems, especially those running for long hours or operating in hot or tight spaces, air cooling is simply not enough.
That’s where liquid cooled motors come in.
These motors are designed to handle more power, deliver better performance, and stay cooler for longer. Whether you’re using them in mobile generators, hybrid vehicles, or industrial machinery, liquid cooled electric motors offer serious advantages over air-cooled types.
At Innotec Power, we specialise in liquid cooled BLDC motors, also known as brushless DC motors, and permanent magnet synchronous motors (PMSM electric motors). Our motors are engineered for reliability, thermal precision, and high efficiency in real-world conditions.
Let’s explore why liquid cooled motors are becoming the first choice for many engineers and OEMs.
What Are Liquid Cooled Motors?
Liquid cooled motors are electric motors that use a liquid—such as water or coolant—to remove heat from inside the motor. Unlike air-cooled motors that rely on fans or airflow, these motors have built-in cooling jackets or channels where liquid flows through, pulling away the heat.
This system keeps the electric motor much cooler, even during heavy use.
There are many types of liquid cooled motors, such as:
Liquid cooled PM motors (Permanent Magnet)
Liquid cooled BLDC motors
Liquid cooled PMSM motors
The main benefit of all these motors is that they maintain stable temperatures while delivering high power output continuously.
Why Innotec Power Builds Liquid Cooled Motors
At Innotec Power, we offer liquid cooling as an option across multiple motor families. Our designs are made for demanding, high-performance applications that need thermal reliability.
Some of our top liquid cooled motor series include:
145 Series
255 Series
360 Series
These BLDC electric motors can be customised with liquid-cooled housings, designed to run smoothly even under continuous duty up to 150 kW. Whether your system needs a 24V, 48V, or 72V motor, we offer scalable solutions tailored to your voltage and thermal needs.
We use CNC-machined coolant jackets and smart thermal designs that allow our motors to keep running even in harsh or enclosed environments. This makes them perfect for applications where airflow is limited or where continuous output is critical.
Advantages of Liquid Cooled Motors Over Air-Cooled Ones
So, why should someone choose a liquid cooled electric motor instead of an air-cooled motor?
Here are the major advantages:
a) More Power in Less Space
Liquid cooling allows a much higher current density in the copper windings. That means more torque and power in a smaller motor size.
b) Higher Continuous Torque
The motor can deliver strong torque for a longer time without overheating.
c) Longer Motor Life
By keeping temperatures low, liquid cooled BLDC motors help extend the life of the windings and magnets.
d) No Thermal Derating
Many motors lose efficiency or reduce output in high temperatures. Liquid cooled motors keep performing well, even under full load or in sealed compartments.
e) Compact, Sealed Design
Since there’s no need for airflow, motors can be sealed tightly. This helps protect them from dust, moisture, and harsh environments.
In short, if you want more performance without the heat problems, liquid cooled PM motors are the answer.
When Should You Choose a Liquid Cooled Motor?
Choosing the right electric motor isn’t just about voltage and torque. Thermal performance is just as important.
You should consider liquid cooled motors if your system:
- Runs for long hours or continuous duty
- Operates in hot or enclosed spaces
- Experiences frequent stop-start cycles
- Requires high torque and power density
- Cannot afford overheating or shutdowns
For example, PMSM electric motors and BLDC electric motors with liquid cooling are ideal for:
- Military and construction equipment
- Mobile power units and generators
- EV and hybrid drivetrains
- Industrial automation systems
If you’re designing a system where heat can become a problem, switching to a liquid cooled motor can make a huge difference in reliability and performance.
Custom Thermal Engineering by Innotec
At Innotec Power, we don’t just build motors—we engineer them for your exact needs.
Our team runs detailed thermal simulations for each project. We analyze the expected heat load and decide if liquid cooling is required. If it is, we offer:
Modular cooling jackets
Temperature sensors
Custom coolant flow ports
This ensures the motor remains cool even during the most demanding applications.
We work closely with engineers and OEMs to deliver the best motor for each project—whether it’s a liquid cooled BLDC motor or a PMSM electric motor designed for sealed operation.
Available Voltage Options
We offer liquid cooled motors in the following voltage ranges:
24V liquid cooled motors – Ideal for compact mobile equipment
48V liquid cooled motors – Perfect for hybrid systems and light EVs
72V liquid cooled motors – Best for high-power industrial use
No matter your system size or voltage, we have a solution ready for integration.
If you’re building a machine or power system where performance, durability, and thermal control are important, liquid cooled motors are the right choice. At Innotec Power, we build these motors for real-world use—whether it’s in generators, vehicles, or factory systems.
Compared to air-cooled types, liquid cooled electric motors offer:
- Higher power
- Longer life
- Stable temperature
- Smaller size
- Higher continuous torque
With customizable options and proven platforms like the 145, 255, and 360 Series, we’ll help you find the right motor for your specific project.