Abstract: Under a condition that rotor rotation speeds ?es are equal, winding wire currents Id, Iq are equal, and winding wire inductances Ld, Lq are equal in first and second electric motors (1, 2), a magnet temperature anomaly detector (30) provided in a microcomputer (5) calculates a change ratio d(|?ml??mr|)/dt of a magnetic flux difference between the first and second electric motors (1, 2) based on the difference Vql*?Vqr* between a q-axis voltage command value Vql* corresponding to the first electric motor (1) and a q-axis voltage command value Vqr corresponding to the second electric motor (2), and then when the change ratio d(|?ml??mr|)/dt of the magnetic flux difference is more than a predetermined threshold Sh1, it is determined that a permanent magnet of at least any one of the electric motors (1, 2) has a temperature anomaly.

Abstract: Under a condition that rotor rotation speeds ?es are equal, winding wire currents Id, Iq are equal, and winding wire inductances Ld, Lq are equal in first and second electric motors (1, 2), a magnet temperature anomaly detector (30) provided in a microcomputer (5) calculates a change ratio d(|?ml??mr|)/dt of a magnetic flux difference between the first and second electric motors (1, 2) based on the difference Vql*?Vqr* between a q-axis voltage command value Vql* corresponding to the first electric motor (1) and a q-axis voltage command value Vqr corresponding to the second electric motor (2), and then when the change ratio d(|?ml??mr|)/dt of the magnetic flux difference is more than a predetermined threshold Sh1, it is determined that a permanent magnet of at least any one of the electric motors (1, 2) has a temperature anomaly.

Abstract: A rotor is adapted to be used in a reluctance motor configured to generate a magnetic field around the rotor to form magnetic circuits passing through the rotor to produce a driving force corresponding to a torque generated by changes in magnetic reluctance in the magnetic circuits. The rotor includes a first salient pole group and a second salient pole group. The first salient pole group includes a plurality of first salient poles configured and arranged to be energized simultaneously with the first salient poles being spaced apart from each other in a circumferential direction of the rotor. The second salient pole group includes a plurality of second salient poles configured and arranged to be energized simultaneously with the second salient poles being spaced apart from each other in the circumferential direction of the rotor. The first salient pole group is magnetically insulated from the second salient pole group.

Abstract: A rotor is adapted to be used in a reluctance motor configured to generate a magnetic field around the rotor to form magnetic circuits passing through the rotor to produce a driving force corresponding to a torque generated by changes in magnetic reluctance in the magnetic circuits. The rotor includes a first salient pole group and a second salient pole group. The first salient pole group includes a plurality of first salient poles configured and arranged to be energized simultaneously with the first salient poles being spaced apart from each other in a circumferential direction of the rotor. The second salient pole group includes a plurality of second salient poles configured and arranged to be energized simultaneously with the second salient poles being spaced apart from each other in the circumferential direction of the rotor. The first salient pole group is magnetically insulated from the second salient pole group.

Abstract: A drive apparatus basically comprises left and right drive units each including at least a reduction gear, an electric motor without a permanent magnet, and a brake disc. Each of the left and right drive units is housed substantially within a rim of each of rear wheels which are driven wheels. A 4WD control unit is configured to control a pair of inverters to separately drive the electric motors when a vehicle speed is in a range between a standing start speed and a prescribed vehicle speed, and to stop driving the electric motors when the vehicle speed is equal to or greater than the prescribed vehicle speed to place the rear wheels in a driven state. Accordingly, a friction loss due to a cogging torque encountered in a conventional permanent magnet-type motor is eliminated, and a lightweight drive apparatus is obtained. Fuel efficiently is accordingly improved.

Abstract: A drive apparatus basically comprises left and right drive units each including at least a reduction gear, an electric motor without a permanent magnet, and a brake disc. Each of the left and right drive units is housed substantially within a rim of each of rear wheels which are driven wheels. A 4WD control unit is configured to control a pair of inverters to separately drive the electric motors when a vehicle speed is in a range between a standing start speed and a prescribed vehicle speed, and to stop driving the electric motors when the vehicle speed is equal to or greater than the prescribed vehicle speed to place the rear wheels in a driven state. Accordingly, a friction loss due to a cogging torque encountered in a conventional permanent magnet-type motor is eliminated, and a lightweight drive apparatus is obtained. Fuel efficiently is accordingly improved.

Abstract: A pair of feed rollers for sending an ink ribbon into a ribbon case have a number of grooves on the circumferential faces thereof such that opposed grooves do not mesh with each other. A heater is disposed in a travel path for the ink ribbon, for heating the ink ribbon to prevent deterioration of the drawability of the ink ribbon drawn by the pair of feed rollers.

Abstract: A lower body construction for a motor vehicle, including a pair of side sills, a floor panel attached to the side sills and formed with a tunnel portion, and a pair of cross members each having a hat-shaped cross section and provided on the floor panel. A pair of recesses are, respectively, formed at opposite sides of the floor panel, while an outer end of each of the cross members is spaced slightly away from each of the side sills inwardly, whereby a reinforcement member having the hat-shaped cross section and extending continuously between the tunnel portion and each of the side sills is constituted by each of the cross members and each of the recesses.

Abstract: A novel rubber composition is obtained by blending a rubber mixture consisting of 15 to 50 parts by weight of 1,2-polybutadiene having a 1,2-addition unit content of 70% or more, a crystallinity of 5 to 40% and an intrinsic viscosity [.eta.] of 0.7 dl/g or more (as measured in toluene at 30.degree. C.) and 85 to 50 parts by weight of at least one rubber selected from the group consisting of natural rubber and diene-based rubbers with 3 to 10 parts by weight of sulfur per 100 parts by weight of said rubber mixture. Said rubber composition has a desirable processability and exhibits, on curing, high hardness, high modulus, low temperature dependency of physical properties, low heat generation and excellent blow-out resistance. It is suitable as a rubber material for use in various low profile automobile tires such as radial tires.