Elevator Motor magnets are One of the Core Components

Elevator motor magnets are one of the core components in elevator systems. These magnetic cores are usually made from neodymium alloy (NdFeB) material.

The neodymium material is used because it has a high coercivity (the ability to hold a magnet against a force) and it can be machined in a wide variety of shapes. This makes it an excellent choice for applications where a small size is important or where space is limited.

Permanent Magnet Synchronous Motors

The permanent magnet synchronous motors (PMSM) have many benefits over conventional induction motors including lower energy consumption, smaller size, and less noise. They are also more durable and have better control performance.

In addition, PMSM motors can be used in gearless systems without a gear box. This can reduce mechanical noise and vibration, improve system solidity, and decrease power losses.

These advantages make PMSM motors ideal for elevator applications. In addition, they are more efficient than synchronous motors and can be designed to operate at low speeds for smoother operation.

Electromagnetic Compatibility

Because PMSMs use an electrically commutated rotor field, it is necessary that the drive commutates this magnetic field at exactly the same angle as the rotor. If the commutation angle is incorrect, it will produce an incorrect voltage and current that may not produce the desired amount of torque.

To ensure that the commutation angle is correct, a physical reference procedure must be performed during startup. This can be done by using an absolute position encoder that is mounted directly to the motor shaft.

During the startup, the encoder will be re-calibrated to the rotor position to ensure that the commutation angle is correctly aligned with the rotor field. This can be done by comparing the encoder to a rotor pole or another known rotor position.

When the motor is not in a proper position, it will draw a high current that can damage the motor. This can occur due to an encoder offset position learn or an incorrect motor phasing. Incorrect motor phasing is caused by incorrect encoder mounting orientation or a mismatch in the incremental A-B speed channel phasing.

The phasing may need to be adjusted by swapping the A-B channels or physically changing them at the interface or via a software parameter setting.

Neodymium Magnets

Because of their high coercivity, neodymium magnets are highly effective in elevator motors. They are available in a variety of shapes and have been widely used in elevators for years.

In addition, they have a very strong resistance to heat and corrosion and are very strong for their weight. This makes them ideal for applications where space is limited or where the motor is exposed to large amounts of heat.

Neodymium magnets are a key component in the elevator industry because they offer high reliability and are relatively inexpensive. They can be manufactured in a wide range of sizes and shapes and are available in a variety of grades, such as N35SH, N38SH, and N40SH.