Drive wheel

About: Drive wheel is a research topic. Over the lifetime, 12596 publications have been published within this topic receiving 55877 citations.

Motion control in an electric vehicle with four independently driven in-wheel motors

Abstract: We study methods of motion control for an electric vehicle (EV) with four independently driven in-wheel motors. First, we propose and simulate a novel robust dynamic yaw-moment control (DYC). DYC is a vehicle attitude control method that generates yaw from torque differences between the right and left wheels. The results of simulations, however, identify a problem with instability on slippery, low /spl mu/ roads. To solve this problem, a new skid detection method is proposed that will be a part of traction control system (TCS) for each drive wheel. The experimental results show that this method can detect a skidding wheel, without any information on chassis velocity. Therefore, this method will be of great help during cornering or braking in a TCS. These methods will be integrated and tested in our new experimental EV.

Single-motor extrusion head having multiple extrusion lines

Abstract: An extrusion head (20) comprising at least one drive wheel (51) and an assembly (50) positionable between at least a first state and a second state. The assembly (50) comprises a first extrusion line (58) configured to engage the at least one drive wheel (51) while the assembly is positioned in the first state, and a second extrusion line (60) configured to engage the at least one drive wheel (51) while the assembly (50) is positioned in the second state.

Application of direct drive wheel motor for fuel cell electric and hybrid electric vehicle propulsion system

Abstract: This paper presents a gearless wheel motor drive system specifically designed for fuel cell electric and hybrid electric vehicle propulsion application. The system includes a liquid-cooled axial flux permanent-magnet machine designed to meet the direct-drive requirements. The machine design implements techniques to increase the machine inductance in order to improve machine constant power range and high-speed efficiency. The implemented technique reduces machine spin loss to further improve efficiency. The machine design also optimizes the placement of magnets in the rotor to reduce cogging and ripple torque. An original cooling system arrangement based on the use of high thermal conductivity epoxy joining machine stator and liquid-cooled aluminum casing allows the very effective removal of machine power loss. Design details and experimental results are presented

Controller for manipulation of instruments within a catheter

Abstract: A controller for moving an elongated medical instrument in a catheter comprising a supporting structure including a mounting section adapted to be coupled to a catheter and a drive section. The controller also includes a drive wheel and a secondary wheel with each of the wheels having a peripheral surface. Each of the peripheral surfaces has an instrument groove portion. One of the wheels has a circumferential recess in its peripheral surface and the other of the wheels provides a circumferential projection. The wheels are rotatably mounted on the drive section with the peripheral surfaces in generally confronting relationship and with the projection in the recess to align the wheels and to maintain the wheels in alignment as the wheels rotate. The instrument groove portions are in confronting relationship to provide an instrument groove which is sized and adapted to receive an elongated medical instrument.

Control system for automatic transmission

Abstract: A control system of an automatic transmission has a fluid transmission apparatus (12) connected to an engine (10); input speed detecting device (49) for detecting an input-end rotational speed of the hydraulic transmission apparatus; output speed detecting device (47) for detecting an output-end rotational speed of the hydraulic transmission apparatus; and drive-wheel idle rotation determining device (93) for determining whether the rotational speed ratio of the output-end rotational speed to the input-end rotational speed is equal to or greater than a predetermined value. If the rotational speed ratio is equal to or greater than the predetermined value, the determining device determines that a drive wheel is idly rotating. Thus the control system has only to calculate the input-end and output-end rotational speeds of the hydraulic transmission apparatus, and does not need to determine a change of the rotational speed of the output shaft of a transmission apparatus. The control system therefore eliminates the need to monitor the rotational speed of the output shaft, enabling quick detection of idle rotation of a drive wheel and, consequently, quick decision as to whether to inhibit a shift.