IPM vs SPM Electric Motors A PM motor can be separated into two main categories: surface permanent magnet motors (SPM) and interior permanent magnet motors (IPM) . Neither motor design type contains rotor bars. Both types generate magnetic flux by the permanent magnets affixed to or inside of the rotor. SPM motors have the magnets [...]
Difference Between Inline and Surface Mount NdFeB Magnets in PM Motors What is the difference between inline and surface mount design of NdFeB magnets for permanent magnet motors? A permanent magnet (PM) motor is a type of AC motor that uses permanent magnets embedded or attached to the surface of the motor rotor. Electric vehicles [...]
Effects of Magnetic Parameters on Permanent Magnet PM Motors How to measure the magnetic properties of magnet? Almost all magnet manufacturers use B-H curve testing equipment to get the demagnetization curve of magnet. This method is a closed circuit measurement, and an uniform cross-section sample is clamped between the faces of electromagnet. The testing sample [...]
Can NdFeB Absorb Objects 600 Times Its Own Weight? Not Exactly Magnets can pick up heavy objects. It is said on the Internet that NdFeB magnets can pick up objects 600 times their own weight. Is this accurate? Is there a formula for calculating magnet attraction? Today, I will tell you about the "attractive force" [...]
Magnetic Materials in Loudspeakers (Horns) The core component responsible for producing sound in audio equipment is the loudspeaker, commonly known as the horn, whether it is a stereo or a headset, this key component is indispensable. The loudspeaker is a transducer device that converts electrical signals into acoustic signals. The performance of the loudspeaker has [...]
If Magnet Keeps Doing External Work, Will Its Magnetism Become Weaker? The problem itself is actually a misunderstanding of magnets. Magnets can do work, but they do not consume their own magnetism in the process of doing work. Magnets look magical, but they are actually not mysterious. The principle is very similar to that of [...]
Why is the US Military Hypersensitive to a Chinese Magnet? Some time ago, during a routine inspection of the F-35 fighter jets, the US military "suddenly" discovered that there were actually Chinese-made magnets on the turbine engines of these fighter jets! This is incredible. The U.S. military has regulations prohibiting the procurement and use of [...]
Standards and Requirements for Using NdFeB Magnets Neodymium iron boron magnets are particularly strong in magnetism. The first thing to do is to prevent hands or other parts of the body from being clamped by the magnets. More attention should be paid to safety for large-scale strong magnetism. Do not place strong magnets near electronic [...]
Concentration Problem of Powerful Strong Magnets One of the daily tasks in the overall planning of the equivalent circuit of a strong magnet is to drive the magnetic flux density of the magnetic air gap as far as possible. The analogy of the power circuit to the current intensity driving is simple, just modify the [...]
Magnetic Properties of Materials: Detailed Explanation According to Ampere’s law, when current flows through a wire or solenoid then magnetic field is produced around it. The magnetism produced by an atom can be due to 2 types of motion of electrons; spin and orbital motion. The net magnetic field created by the electrons in an [...]
How to Make Magnets Weaker? What Are the Methods? Some people want the magnetism to become stronger, and some feel that the magnetism is too strong and want to reduce it and become weaker. Today, our article mainly talks about some methods and techniques to make the magnetism weaker. I hope it will help you. [...]
Determining Factors that Affect Magnetic Field Strength Consider a magnet's characteristics. Magnetic properties are described using these characteristics: Coercive magnetic field strength, abbreviated Hc. This represents the point at which the magnet can be demagnetized (degaussed) by another magnetic field. The higher this number, the more difficult it is to degauss the magnet. Residual magnetic [...]
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