Permanent Magnets Used In Vehicle Power Steering
We’ve written extensively about the impact of magnets on the transportation industry, specifically cars. From brake systems and brake lights to sensors and motors, magnets are used in varied capacities throughout even the average vehicle. One system we haven’t covered is the steering system or electric power steering system (EPS). These days, the majority of commercial cars have one as it impacts safety, comfort, and stability. An EPS system uses an electric motor, which in turn uses permanent magnets, to operate.
Electric Power Steering System (EPS)
Power steering used to be hydraulic, meaning it drained power from the engine even when the steering operation was occurring. By switching to electricity, energy consumption can be reduced. In compact cars, some EPS use ferrite magnets; however, in larger cars, brushless motors typically use rare earth magnets. While the structural components of different cars aren’t standard, the composition of the steering system is typically the same. An EPS is composed of:- Sensor
- Electronic control unit
- Permanent magnet motor (usually neodymium)
- Reducer
- Mechanical steering gear
- Battery power supply