Types of Electromagnetic Brakes
Brakes are those mechanical devices that inhibit motion of moving objects. Since they have a really beneficial ability, they are included in all vehicles and a variety of systems. However, there are many different types of brakes, each designed for specific vehicle or system. The electromagnetic brakes are definitely the most popular type of brakes, as they work electrically and transmit torque mechanically. They are mainly used in heavy vehicles that are more difficult to stop, as an addition to the regular friction brakes. Here are the 4 most commonly used electromagnetic braking system types.
Electromagnetic Power Off Brakes
The EM power off brakes are used to hold or stop a load when the electrical power has been accidentally lost or disconnected. Since they are used as a plan B, the power off brakes are referred to as fail safe brakes. Installed on or near the electric motor, they are heavily used as servo motor brakes, holding brakes, robotics, etc. For increased brake torque, multiple disks can be used. There are two main types of fail safe brakes: spring applied and permanent magnet brakes. They do have differences, but both power off brakes types work when no power is applied to them.
Electromagnetic Particle Brakes
This electromagnetic braking system is the most unique type of EM brakes, as they use a design from other electro-mechanical brakes and have a wide operating torque range. As any type of electro-mechanical brake, the torque to voltage is almost linear, but with magnetic particle brakes, the torque can be controlled very accurately. With this ability, they are perfectly suitable for tension-control applications. Also, they have a fast response, which makes them efficient for high cycle applications.
Electromagnetic Hysteresis Power Brakes
The electromagnetic hysteresis power brakes are known for having an incredibly wide torque range and exceptional torque repeatability. These brakes can even be controlled remotely, so they are perfect for test-stand applications where varying torque is needed. But as the drag torque is minimal, the EM hysteresis power brakes provide a wide torque range of any hysteresis product. As mentioned, the test stand applications are most suitable for this electromagnetic braking system.
Multiple Disc Brakes
When extremely high torque within a small space is needed, the multiple disc brakes are an obvious choice. The multiple disc brakes can be used either dry or wet, so they are suitable for running in multi-speed gear box applications, applications that involve machine tools and in off-road equipment.