The PemRam-an electromagnetic linear actuator

The PemRam was originally designed to replace hydraulics in vehicle simulators. Previously, only high-pressure fluid actuators could provide the bandwidth and precision that was needed for accurate motion simulation but they could not be used in confined spaces close to the general public. Hydraulic actuators are also inefficient when they are used in simulators, so that even a small machine had to use a three-phase power outlet. These disadvantages were blocking access to a very large market for small simulators. We have developed a range of electromagnetic actuators that combine the properties of a DC motor with those of a pneumatic ram. In a motion base the pneumatic piston forms part of a gas-spring assembly that supports the simulator capsule at any height and attitude and the new technology exceeds the performance of hydraulic machines. The PemRam has a number of unique properties that have applications in other markets.