Magnets for DC motors

A simple direct current motor, also known as a DC motor, pairs an electromagnet with a permanent magnet. The electromagnet is often called the rotor and is a spinning coil of wire. The permanent magnet is called a stator because it doesn't move. The DC motor creates a magnetic field, attracting and repelling the magnets on the motor. This is powered by a direct current, which transforms electrical energy into mechanical energy. There are four main types of DC motor: brushed, brushless, series and shunt, and this variation allows for a great range of different applications.

Magnetic challenges in DC motor applications

DC motors with permanent magnets are sensitive to overheating and can be overloaded. This means DC motor magnets need to be carefully selected for their ability to withstand high temperatures. Demagnetisation can also occur due to excessive heating and when the motor is overloaded for an extended period.

Applications of DC motor magnets

Due to the different types of DC motors available, various applications for DC motor magnets are covered. DC motors are often chosen over other types for industrial applications as we can precisely control a DC motor's speed. These motors also have a high startup torque, so they're helpful for applications that need consistent speed with variable torque. DC motors have been around for over 130 years with a simple design, so they're easy to install, require little maintenance, and can be repaired at a low cost.

Some examples of applications of DC motor magnets are:

• Cranes
• Electric vehicles (EVs)
• Pump drives
• Ceiling fans
• Conveyor systems

Our DC motor magnets

We supply a wide range of DC motor magnets, including:

Samarium cobalt magnets — resistant to high temperatures and corrosion.

Neodymium magnets are used for brushless DC motors. They produce more energy than samarium cobalt, and a protective coating in the form of plating can be added to neodymium (such as nickel plating).

Alnico magnets are used where high voltage and low current are needed.

Ferrite magnets have brilliant resistance to demagnetisation and corrosion and can be cut into different shapes and sizes at a relatively low cost.

Pot magnets — used with a wide range of magnet materials, including alnico, ferrite, neodymium and samarium cobalt.

Quality assured magnets

Quality directly affects magnet application's efficiency, reliability and general performance. That's why quality assurance measures are at the forefront of what we do, and we're proud that our strict stance is proven in our ISO9001 and ISO14001 certifications, showing how our commitment to quality and environmental responsibility is always at the core of our work.

Customer satisfaction is integral to our business. Our customers rely on us to supply the highest quality magnets.

Why choose e-Magnets for magnetic applications?

Our customers span many fields, including healthcare, renewable energy and aerospace — they depend upon the quality of our products and high standards. E-Magnets is an expert magnet and magnetic product supplier — a global business with over 60 years of experience.

With over 1,500,000 magnets in stock, there's a substantial range to choose from, and we can customise our products to an exact specification. We're proud to be able to supply magnets worldwide, and we're always looking to innovate, ensuring that we stay at the forefront of the latest in magnet development.