What Is a Coreless Motor? | Ever wondered what’s inside a coreless motor? After all, if it doesn’t have a core, is it hollow?
The coreless motor is the most common type of electric motor. It has no permanent magnets and uses electromagnets to create magnetic fields. These fields turn an armature, which in turn turns a shaft connected to it.
This article will explain what they’re made from, how they work, and why you might want one for your next project!
What are Coreless Motors Made From?
A coreless motor consists of two main parts; the stator and the rotor (the moving part). The stator contains magnetic coils of wire wound around poles or teeth on its surface. These windings act as electromagnets when current passes through them.
When power applies to these coils, magnetic forces attract iron particles. As the rotor spins, this attraction causes the iron particles to move along with it. In other words, the rotor acts like a magnet attached to a spinning wheel.
Difference Between Core and Coreless Motors
Coreless motors have no iron cores. Instead, they use electromagnets to produce their own magnetic field. Because there’s no permanent magnet, coreless motors don’t need any bearings at all.
That means they’re much lighter than traditional DC motors. Also, because they lack steel housing, they can be smaller and more compact. Yet, suppose you do decide to build a small-scale model using a coreless motor. Make sure to choose a high-quality unit so that it won’t
Benefits of Coreless Motors
Coreless motors are, in most cases, the preferred choice. They have several advantages that come with the absence of an iron core. These include:
No Rotor Inertia
Because coreless motors don’t contain a rotating mass, they need less energy to spin up. For example, a typical hobbyist RC car requires about 1/3rd the amount of battery power of a typical motor.
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Smaller Size and Lighter Weight
Another benefit of coreless motors is that they weigh much less than standard DC motors. A good rule of thumb is that each gram counts towards the weight of a vehicle.
So even though a coreless motor weighs only half as much as a regular DC motor, it still makes sense to go with the latter since it adds much more weight to the vehicle.
No Cogging Torque
Cogging torque refers to the momentary resistance felt while turning a gearbox. If cogs don’t mesh together, then the gears may not work as they should.
But if the cogs are well-matched, then the gears should move without any noticeable friction. With coreless motors, there isn’t any cogging torque whatsoever. Thus, they provide better performance compared to conventional DC motors.
Coreless Motors for Many Use Cases
Whatever your use case, coreless motors are definitely worth considering. They offer many benefits over conventional DC motors. These include reduced size, lower cost, and improved efficiency.
And best of all, they get rid of the need for bearings altogether. So whether you’re building a remote control toy car or a full-scale engine, consider a coreless motor.
Keep reading for more top tips that won’t grind your gears!