342 results about "Electromagnetic suspension" patented technology

The present invention provides a rotational magnetic gimbal with an integral magnetic bearing. Brushless DC motor technology provides electromagnetic suspension, using a single electromagnetic actuator to perform both the radial bearing and rotary torque (motoring) functions. An integrated motor and magnetic bearing consistent with the invention comprises a rotor comprising a plurality of permanent magnets and a stator comprising a plurality of independently controlled coil segments magnetically coupled to the permanent magnets. Embodiments may further comprise first and second radial position sensors, the first radial position sensor disposed in or adjacent to a clearance gap between the rotor and the stator for sensing the position of the rotor with respect to the stator along a first axis, and a second radial position sensor disposed in or adjacent to the clearance gap between the rotor and the stator for sensing the position of the rotor with respect to the stator along a second axis. In method form, a method for providing integral electromagnetic motor and bearing functions comprises sensing a first radial position of a rotor, the rotor comprising a plurality of permanent magnets, with respect to a stator along a first axis, the stator comprising a plurality of independently controlled coil segments magnetically coupled to the permanent magnets; and sensing a second radial position of the rotor with respect to the stator along a second axis; and delivering current to at least one coil segment, the amount of current based on at least one sensed position.

The invention provides a high-damping and high-thrust cylindrical linear motor and an electromagnetic suspension and a metor-driven steering device using the same. A stator includes a stator winding and a stator core. A slider includes a slider core and a plurality of permanent magnets. The stator core includes a plurality of stator core magnets comprising a plurality of small magnets on surface of the slider side; two auxiliary poles deployed at both ends of the stator-core salient poles; a yoke units configured to compose a magnetic circuit with the auxiliary pole. The magnetic circuit composed by using the stator core is shared among the three phases. Polarities of magnets of the slider become an identical polarity, each of the plurality of permanent magnets being positioned at a position which is opposed to each of the plurality of small poles included in one stator-core salient pole out of the plurality of stator-core salient poles.

The invention relates to a hybrid electromagnetic suspension system capable of realizing self-power supply and a control method thereof. Comprises an integrated structure of a linear motor and an equivalent hydraulic damper cylinder block, a suspension spring, a connecting pipeline, a hydraulic rectifier bridge, an accumulator, a hydraulic motor and a rotating electric machine, wherein the upper cavity and the lower cavity of the working cylinder are communicated with each other through the hydraulic rectifier bridge and the oil circuit, and the lower cavity is communicated with the oil storage cylinder. The ECU recognizes the pavement grade according to the received sensor signal, and switches to the corresponding mode to control the suspension, so as to obtain the optimal suspension performance under each pavement grade. The control method includes passive mode, semi-active mode and active mode. Under the condition of good road condition, the linear motor and the equivalent hydraulicdamper of the device of the invention recover vibration energy together; When the road surface is poor, the suspension vibration is attenuated by the linear motor together with the equivalent hydraulic damper, and the vibration energy is recovered by the equivalent hydraulic damper, so the self-energy supply can be realized.