Abstract: A rotary electric apparatus comprises a rotor including a first and second rotor members, a stator including a first stator and second stator members with armature coils to which armature current is supplied for synchronous rotation. The first and second rotor members are formed into a skewed type. Control means for controlling amounts ?1 and ?2 of field magnetic flux generated by the first and second rotor members, respectively, such that the amounts ?1 and ?2 differ from each other to reduce a difference between a maximum amplitude of a predetermined-order harmonic component F1 of an electromagnetic force caused by a pair of the first rotor member and the first stator member and a maximum amplitude of the predetermined-order harmonic component F2 of an electromagnetic force caused by a further pair of the second rotor member and the second stator member is reduced.

Abstract: A tooth coil of a concentrated winding stator includes a first layer coil arranged by successively winding a flat type wire around a tooth in a direction advancing from a proximal end portion to a distal end portion of the tooth and a second layer coil arranged by successively winding the wire around and on the first layer coil in a direction advancing from the distal end portion to the proximal end portion of the tooth. The second layer coil of the tooth coil has no turn at a most proximal end portion of the tooth corresponding to a start turn of the first layer coil, so that the tooth coil has an odd turn number.

Abstract: An object of the present invention is to provide a motor control apparatus having excellent harmonic current control performance, that can simplify circuit configuration and circuit processing while, at the same time, achieving improved control accuracy. To achieve this object, detected motor currents are converted by coordinate converters 19 and 20 into an nth-order dq-axis signal and an mth-order dq-axis signal, and their DC components are extracted by low-pass filters 22 and 23; then, the differences of the DC components relative to respective command values are converted back into three-phase AC signals to control the motor currents.

Abstract: A method for greatly reducing magnetic sound of an alternating current rotating machine compared with the past comprising superimposing an n?1-th order frequency in inverse turn on a multi-phase alternating current with reference to a basic frequency component of the multi-phase alternating current supplied to an armature of the alternating current rotating machine of multiple phases so as to reduce the n-th order harmonic components of the basic frequency component among radial direction magnetic vibrating forces generated in the radial direction in a core of the alternating current rotating machine.

Abstract: The invention provides techniques for reducing or altering the magnetic noise of an AC rotary electric machine. A magnetic noise reducing harmonic current of order n, whose frequency is n times the frequency of the fundamental frequency component of a polyphase AC current fed to an armature of a polyphase AC rotary electric machine, is superimposed on the polyphase AC current, thereby reducing or altering a harmonic component having a frequency (n?1) times the frequency of the fundamental frequency component and occurring due to a radial magnetic excitation force acting radially on an iron core of the AC rotary electric machine.

Abstract: A rotary electric machine has a housing and a stator core and a plurality of fixing members. The core has sheet units laminated along an axial direction. Each unit has core sheets disposed along a circumferential direction so as to be butted to one another on butted surfaces of the sheets. Each position of the butted surfaces of each sheet in the circumferential direction differs from any of those of other sheets adjacent to the each sheet along the axial direction. The sheets of each unit have a plurality of fixing holes disposed along the circumferential direction such that each hole in each unit is aligned with a group of holes in the other units along the axial direction. Each of the members penetrates through a group of aligned holes of the units along the axial direction and is fixed to the housing.

Abstract: A first layer coil is wound around the surface of a tooth in a direction advancing from a proximal end portion to a distal end portion of this tooth. A second layer coil is wound on the first layer coil in a direction advancing from the distal end portion to the proximal end portion of the tooth coil. Lead wires extend outward in the radial direction from a winding start end of the first layer coil and a winding terminal end of the second layer coil. Respective tooth coils of the same phase are serially connected to arrange three phase windings. A crossover bus bar group is accommodated in a space having a square cross section defined by a core back and a coil end of the tooth coil.

Abstract: A concentrated winding stator coil of a proximal end extraction type two-layer winding arrangement includes numerous tooth coils which are connected in series to arrange serial coil units and also connected in parallel as pairs arranging respective phase windings. Plural inter-coil bus bars are provided to connect the tooth coils of the serial coil units. Plural terminal bus bars extend from both ends of the serial coil units to connect respective serial coil units in parallel with each other. These bus bars are disposed adjacently to an end face of a core back.

Abstract: A method for greatly reducing magnetic sound of an alternating current rotating machine compared with the past comprising superimposing an n?1-th order frequency in inverse turn and an m+1-th order magnetic sound reduction use harmonic current in the same turn on a multi-phase alternating current with reference to a basic frequency component of the multi-phase alternating current supplied to an armature of the alternating current rotating machine of multiple phases so as to reduce the n-th order, m-th order, and n+m-th order harmonic components of the basic frequency component among radial direction magnetic vibrating forces generated in the radial direction in a core of the alternating current rotating machine.

Abstract: An object of the present invention is to provide a motor control apparatus having excellent harmonic current control performance, that can simplify circuit configuration and circuit processing while, at the same time, achieving improved control accuracy. To achieve this object, detected motor currents are converted by coordinate converters 19 and 20 into an nth-order dq-axis signal and an mth-order dq-axis signal, and their DC components are extracted by low-pass filters 22 and 23; then, the differences of the DC components relative to respective command values are converted back into three-phase AC signals to control the motor currents.

Abstract: An interior permanent magnet electric rotating machine is configured such that either at least one of first intervals between first flux direction regulation portions of a plurality of first flux barriers provided in a rotor core of the machine or at least one of second intervals between second flux direction regulation portions of a plurality of second flux barriers provided in the rotor core is different from corresponding at least one of the remaining first intervals therebetween or at least one of the remaining second intervals therebetween.

Abstract: A first layer coil is wound around the surface of a tooth in a direction advancing from a proximal end portion to a distal end portion of this tooth. A second layer coil is wound on the first layer coil in a direction advancing from the distal end portion to the proximal end portion of the tooth coil. Lead wires extend outward in the radial direction from a winding start end of the first layer coil and a winding terminal end of the second layer coil. Respective tooth coils of the same phase are serially connected to arrange three phase windings. A crossover bus bar group is accommodated in a space having a square cross section defined by a core back and a coil end of the tooth coil.

Abstract: A concentrated winding stator coil of a proximal end extraction type two-layer winding arrangement includes numerous tooth coils which are connected in series to arrange serial coil units and also connected in parallel as pairs arranging respective phase windings. Plural inter-coil bus bars are provided to connect the tooth coils of the serial coil units. Plural terminal bus bars extend from both ends of the serial coil units to connect respective serial coil units in parallel with each other. These bus bars are disposed adjacently to an end face of a core back.

Abstract: A method for greatly reducing magnetic sound of an alternating current rotating machine compared with the past comprising superimposing an n?1-th order frequency in inverse turn on a multi-phase alternating current with reference to a basic frequency component of the multi-phase alternating current supplied to an armature of the alternating current rotating machine of multiple phases so as to reduce the n-th order harmonic components of the basic frequency component among radial direction magnetic vibrating forces generated in the radial direction in a core of the alternating current rotating machine.

Abstract: A method for greatly reducing magnetic sound of an alternating current rotating machine compared with the past comprising superimposing an n?1-th order frequency in inverse turn and an m+1-th order magnetic sound reduction use harmonic current in the same turn on a multi-phase alternating current with reference to a basic frequency component of the multi-phase alternating current supplied to an armature of the alternating current rotating machine of multiple phases so as to reduce the n-th order, m-th order, and n+m-th order harmonic components of the basic frequency component among radial direction magnetic vibrating forces generated in the radial direction in a core of the alternating current rotating machine.

Abstract: A rotary electric apparatus comprises a rotor including a first and second rotor members, a stator including a first stator and second stator members with armature coils to which armature current is supplied for synchronous rotation. The first and second rotor members are formed into a skewed type. Control means for controlling amounts ?1 and ?2 of field magnetic flux generated by the first and second rotor members, respectively, such that the amounts ?1 and ?2 differ from each other to reduce a difference between a maximum amplitude of a predetermined-order harmonic component F1 of an electromagnetic force caused by a pair of the first rotor member and the first stator member and a maximum amplitude of the predetermined-order harmonic component F2 of an electromagnetic force caused by a further pair of the second rotor member and the second stator member is reduced.

Abstract: The invention provides techniques for reducing or altering the magnetic noise of an AC rotary electric machine. A magnetic noise reducing harmonic current of order n, whose frequency is n times the frequency of the fundamental frequency component of a polyphase AC current fed to an armature of a polyphase AC rotary electric machine, is superimposed on the polyphase AC current, thereby reducing or altering a harmonic component having a frequency (n?1) times the frequency of the fundamental frequency component and occurring due to a radial magnetic excitation force acting radially on an iron core of the AC rotary electric machine.

Abstract: A generator-motor for a vehicle includes a rotor having a rotor core and a plurality of permanent magnets and a stator having a stator core and an armature winding. The rotor core has a plurality of axially extending through-holes in a circumferential direction thereof to accommodate the permanent magnets and to increase circumferential magnetic reluctance thereof to form a plurality of auxiliary pole portions disposed between the through holes. The stator core has a plurality of teeth radially extending at equal intervals in a circumferential direction to face the rotor core. Each of auxiliary pole has a circumferential width that is 30%-55% of a circumferential width of each tooth. The minimum torque of the generator motor can be increased while torque ripple is reduced.

Abstract: A generator-motor for a vehicle includes a rotor having a rotor core and a plurality of permanent magnets and a stator having a stator core and an armature winding. The rotor core has a plurality of axially extending through-holes in a circumferential direction thereof to accommodate the permanent magnets and to increase circumferential magnetic reluctance thereof to form a plurality of auxiliary pole portions disposed between the through holes. The stator core has a plurality of teeth radially extending at equal intervals in a circumferential direction to face the rotor core. Each of auxiliary pole has a circumferential width that is 30%-55% of a circumferential width of each tooth. The minimum torque of the generator motor can be increased while torque ripple is reduced.

Abstract: A sealed rectifier used in a vehicle alternator is composed of a semiconductor diode chip, a base electrode having a disk plate which has a central mount for supporting the chip and an annular wall extending higher than the central mount, a pole electrode having a flange connected to the other side of the chip and an insulating member covering the chip, base electrode and pole electrode. The thickness of the annular wall is smaller than the thickness of the central mount, the outer periphery of the disk plate has a serrated surface for mechanical connection with an cooling fin of the alternator, and the insulating member is composed of resinous material and inorganic filler material to provide residual internal pressure higher than the atmospheric pressure.