A permanent magnet engine, also known as a permanent magnet generator, is an engine that uses a permanent magnet to generate torque in a magnetic field.
In today's DC motor, the excitation mode that generates the main pole magnetic field by DC current is called current excitation; If the current excitation is replaced by a permanent magnet to generate the main pole magnetic field, the motor is called a permanent magnet generator. The article aims at ferreting out some problems you might meet while you are operating the sophisticated machine and propose the corresponding solutions.
According to the attachment mode of magnet and rotor and rotor design, permanent magnet synchronous motors can be divided into two categories.
A permanent magnet (PM) motor is an AC motor that utilizes magnets either embedded within the surface of the rotor or attached to it. PM motors can be categorized into two main structures: interior and surface, each with its own subcategories.
The working principle of the magnetic coil in the motor is mainly to use the current to generate a magnetic field in the magnetic coil, which interacts with the magnetic field generated by the permanent magnet or electromagnet to generate a magnetic force and drive the rotor to rotate, thus converting electrical energy into mechanical energy.
Permanent Magnet Synchronous Motors (PMSMs) offer exceptional efficiency as brushless motors. Their permanent magnet rotors endow them with higher torque despite their compact frame size and absence of rotor current, granting them significant advantages over AC Induction Motors (AICMs). Leveraging their impressive power-to-size ratio, PMSMs enable the creation of smaller designs without compromising torque output. Overall, PMSMs deliver a compelling combination of reliability, efficiency, and compactness for a wide range of applications.
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