Abstract: Provided is a servo press machine having a configuration that allows miniaturization of the servo press machine, and a motor using the same. A servo press machine includes a servomotor, a crankshaft rotated by driving of the servomotor, a connecting rod connected to an eccentric portion of the crankshaft, and a slide connected to the connecting rod, wherein two connecting rods are connected to the crankshaft, the servomotor is an axial gap motor, a rotor of the axial gap motor is assembled with the crankshaft between the two connecting rods, and a stator of the axial gap motor is fixed to a crown in which the crankshaft is housed.

Abstract: There is provided a manufacturing apparatus for a metal molded body. The manufacturing apparatus includes: a die having an elongated shape in plan view; and a plurality of pairs of thrust units disposed along a wall surface with the die disposed therebetween from both sides of the die, wherein the pairs of thrust units have electromagnetic coils that generate reverse traveling magnetic fields, and the pairs of thrust units arranged in a longitudinal direction are set so as to generate the reverse traveling magnetic fields for each series composed of a single thrust unit or a plurality of the thrust units.

Abstract: There is provided a metal molded body manufacturing apparatus for electromagnetically stirring metallic molten metal and molding a metal molded body. The metal molded body manufacturing apparatus includes: a die having an inclined side wall; and a moving magnetic field generation section that stirs the molten metal in the die, wherein the moving magnetic field generation section includes a magnetic body, and a coil wound around the magnetic body as a center, and an end surface of the magnetic body is disposed in parallel to an inner surface of the side wall.

Abstract: Torque is improved in a composite torque rotating electric machine that uses permanent magnets having a low residual magnetic flux density such as ferrite magnets, and includes: a stator comprising armature windings arranged at a fixed interval at multiple positions on the inner periphery; a rotor which has a permanent magnet in a cylindrical core comprising laminated magnetic steel sheets and is arranged inside of the stator; and magnetic flux blocking units provided across the circumferential direction on the outer periphery of the rotor that block the closed loop magnetic flux generated around the stator windings. The magnetic flux blocking units can be multiple permanent magnets, with a non-magnetic body such as an air gap disposed between them. The distance between the permanent magnets and the non-magnetic part can be smaller than the interval at which the armature windings are arranged.

Abstract: A composite torque rotating electric machine includes a stator having armature windings arranged at multiple positions in a circumferential direction, a rotor having a cylindrical core, first permanent magnets arranged on axes (d) and in the circumferential direction on the outer periphery of the rotor, second permanent magnets arranged on axes (d) on the inner periphery side of the rotor across from the permanent magnets on the outer circumference side, third permanent magnets on axes (q) and extending in the longitudinally and radially of the rotor, and air gaps on the outer periphery side of the third permanent magnets and intermediate in the circumferential direction of the first permanent magnets. The radial distance between the first and second magnets is greater than the circumferential distance between the first permanent magnets and the air gaps. A rectifier having multiple slits is disposed between the first permanent magnets and the air gaps.

Abstract: Provided is a servo press machine having a configuration that allows miniaturization of the servo press machine, and a motor using the same. A servo press machine includes a servomotor, a crankshaft rotated by driving of the servomotor, a connecting rod connected to an eccentric portion of the crankshaft, and a slide connected to the connecting rod, wherein two connecting rods are connected to the crankshaft, the servomotor is an axial gap motor, a rotor of the axial gap motor is assembled with the crankshaft between the two connecting rods, and a stator of the axial gap motor is fixed to a crown in which the crankshaft is housed.

Abstract: A motor control device which can determine a magnetic pole position for a magnetic pole position detector included in a permanent magnet motor in which the reluctance torque proportion is larger than the magnet torque proportion is provided. In a permanent magnet synchronous motor having multi-phase windings of N axes (N?2), the windings of optionally selected K axes (K?N) are DC excited using corresponding independent power supplies.

Abstract: The purpose of the present invention is to improve torque in a composite torque rotating electric machine which uses permanent magnets having a low residual magnetic flux density such as ferrite magnets. This composite torque rotating electric machine is characterized by being provided with: a stator comprising armature windings arranged at a fixed interval at multiple positions on the inner periphery; a rotor which has a permanent magnet in a cylindrical core comprising laminated magnetic steel sheets and which is arranged inside of the stator; and magnetic flux blocking units which are provided across the circumferential direction on the outer periphery of the rotor and which block the closed loop magnetic flux generated around the stator windings. The magnetic flux blocking units are provided with multiple permanent magnets, and a non-magnetic body disposed between said permanent magnets. Further, the non-magnetic body is an air gap.

Abstract: A composite torque rotating electric machine includes a stator having armature windings arranged at multiple positions in a circumferential direction, a rotor having a cylindrical core, first permanent magnets arranged on axes (d) and in the circumferential direction on the outer periphery of the rotor, second permanent magnets arranged on axes (d) on the inner periphery side of the rotor across from the permanent magnets on the outer circumference side, third permanent magnets on axes (q) and extending in the longitudinally and radially of the rotor, and air gaps on the outer periphery side of the third permanent magnets and intermediate in the circumferential direction of the first permanent magnets. The radial distance between the first and second magnets is greater than the circumferential distance between the first permanent magnets and the air gaps. A rectifier having multiple slits is disposed between the first permanent magnets and the air gaps.

Abstract: A permanent magnet motor includes a P-pole-implanted permanent magnet rotator containing a ferrite magnet in a laminated silicon steel sheet, wherein, at one pole, a U-shaped permanent magnet comprising three parts, and, at the outer periphery of the U-shaped magnet, one outer-periphery permanent magnet disposed longitudinally in the peripheral direction are provided to generate permanent magnet torque. At one pole, the permanent magnet rotator generates reluctance torque using two salient poles formed between the U-shaped permanent magnet and the outer-periphery permanent magnet. One central salient pole is formed between the adjacent poles. A stator comprises an M-phase stator winding that is a distributed winding, and a stator core having Ns slots. The ratio of Ns/P/M is a common fraction. When the width of the center salient pole is set to ?cp and the slot pitch of the stator core is set to ?s, ?cp is smaller than ?s.

Abstract: A motor control device which can determine a magnetic pole position for a magnetic pole position detector included in a permanent magnet motor in which the reluctance torque proportion is larger than the magnet torque proportion is provided. In a permanent magnet synchronous motor having multi-phase windings of N axes (N?2), the windings of optionally selected K axes (K?N) are DC excited using corresponding independent power supplies.

Abstract: A highly efficient and reliable motor control system and motor control method are provided. The motor control system includes a motor having a plurality of sets of armature windings, a plurality of inverters which drive the plurality of sets of armature windings, and a plurality of control devices which control the inverters individually.

Abstract: A permanent magnet rotor wherein a rotary shaft has an orthogonal cross a sectional shape orthogonal in a longitudinal direction of the rotary shaft, a plurality of circular-arc portions which are around the axis of rotation of the rotary shaft, and rectilinear portions which connect the adjacent circular-arc portions with straight lines having no curved portion. Respective permanent magnets, equal in number to the circular-arc portions, are fixed extending over the circular-arc portions and the rectilinear portions. The surface of each permanent magnet remote from the rotary shaft has a cross sectional contour orthogonal to the longitudinal direction of the rotary shaft, forming a circular arc which protrudes outward.

Abstract: A fixed slit plate and a rotary slit plate which is secured to a rotating shaft are provided between two photoconductive elements and a light emitting element, and the two photoconductive elements provide two outputs which have the phase difference .pi. therebetween. These two outputs thus provided are added to extract the dc component, thereafter exerting feedback control over the light emitting element such that this dc component is maintained at a constant level.