Abstract: A cooling device for a semiconductor element module and a magnetic part, includes: a water-cooled type heat sink having a cooling water passage; a semiconductor element module including a plurality of chips arranged side by side in a circulation direction in the cooling water passage, the semiconductor element module being mounted on the heat sink; and a magnetic part including a core and a winding portion mounted on the core, the magnetic part being mounted on the heat sink or another heat sink. In the cooling device, a plurality of cooling fins is disposed to extend along the circulation direction in the cooling water passage in a manner that the plurality of cooling fins are separated into groups for the respective chips arranged side by side in the circulation direction, and that the groups of the cooling fins are offset from each other in a direction perpendicular to the circulation direction. Accordingly, it is possible to have improved cooling efficiency of a heat sink with cooling fins.

Abstract: A multi-parallel magnetic-filed cancellation type transformer includes a plurality of coils which generate magnetic flux during energization and a core having a plurality of magnetic leg portions on which the coils are wound, and bases for fixing the magnetic leg portions. The plurality of coils are wound on the magnetic leg portions in such a manner that the magnetic flux generated from the coils are formed in the directions opposite to each other. A plurality of closed magnetic circuits of the magnetic flux are formed at the magnetic leg portions and the bases. The magnetic resistance of the closed magnetic circuits is homogeneous. Accordingly, the transformer can reduce the size thereof, and prevent the deterioration of electric power conversion efficiency.

Abstract: Combined type transformer includes: a transformer core; first and second coils provided with respect to the transformer core; first and second inductor cores provided around the first coil; and third and fourth inductor cores provided around the second coil. The transformer core and the first and second coils constitute a transformer, the first coil and the first and second inductor cores constitute a first inductor, and the second coil and the third and fourth inductor cores constitute a second inductor.

Abstract: A composite transformer, having first and second inductors and a transformer, includes a transformer core that has a core leg around which portions of first and second windings are wound, and a base fixing the core leg, a first inductor core that has a core leg around which a portion of the first winding is wound and a base fixing the core leg, and a second inductor core that has a core leg around which a portion of the second winding is wound and a base fixing the core leg. The first and second windings are wound in a manner that flux are cancelled with each other, and are wound around the core leg of the transformer core in a manner alternately overlapping with each other, and are wound around respective core legs of the first and second inductor cores so as to be apart from each other to suppress any interference of magnetic fluxes.

Abstract: Combined type transformer includes: a transformer core; first and second coils provided with respect to the transformer core; first and second inductor cores provided around the first coil; and third and fourth inductor cores provided around the second coil. The transformer core and the first and second coils constitute a transformer, the first coil and the first and second inductor cores constitute a first inductor, and the second coil and the third and fourth inductor cores constitute a second inductor.

Abstract: A multi-parallel magnetic-filed cancellation type transformer includes a plurality of coils which generate magnetic flux during energization and a core having a plurality of magnetic leg portions on which the coils are wound, and bases for fixing the magnetic leg portions. The plurality of coils are wound on the magnetic leg portions in such a manner that the magnetic flux generated from the coils are formed in the directions opposite to each other. A plurality of closed magnetic circuits of the magnetic flux are formed at the magnetic leg portions and the bases. The magnetic resistance of the closed magnetic circuits is homogeneous. Accordingly, the transformer can reduce the size thereof, and prevent the deterioration of electric power conversion efficiency.

Abstract: According to the invention, the lance for primarily retaining the terminal is formed integrally on the retainer for secondarily retaining the terminal. Therefore, there is no need to form the lance on the connector housing, and therefore the structure of the connector housing can be simplified, and the moldability of the resin-made connector housing can be enhanced.

Abstract: A composite transformer, having first and second inductors and a transformer, includes a transformer core that has a core leg around which portions of first and second windings are wound, and a base fixing the core leg, a first inductor core that has a core leg around which a portion of the first winding is wound and a base fixing the core leg, and a second inductor core that has a core leg around which a portion of the second winding is wound and a base fixing the core leg. The first and second windings are wound in a manner that flux are cancelled with each other, and are wound around the core leg of the transformer core in a manner alternately overlapping with each other, and are wound around respective core legs of the first and second inductor cores so as to be apart from each other to suppress any interference of magnetic fluxes.

Abstract: A magnetic-filed cancellation type transformer includes a primary winding wire and a secondary winding wire which generate magnetic flux when energized, and a core constituted by a magnetic leg portion about which the primary winding wire and the secondary winding wire are wound, and a base for fixing the magnetic leg portion. The primary winding wire and the secondary winding wire are alternately piled and wound on the magnetic leg portion, so that the direction of magnetic flux generated from the primary winding wire and the secondary winding wire are opposite to each other in any couple selected from among the pieces of magnetic flux, and the magnetic flux is cancelled out with each other.

Abstract: A booster circuit according to an embodiment of the present invention comprises: an input terminal; an output terminal; a common terminal; a transformation unit including first, the second, and the third windings, the windings wound in the same direction and connected in series; a first rectifier unit provided between the input terminal and a connection point of the first and the second windings; a second rectifier unit provided between the input terminal and a connection point of the second and the third windings; a first switching unit provided between one end of the transformation unit and the common terminal; a second switching unit provided between other end of the transformation unit and the common terminal; a third rectifier unit provided between a connection point of one end of the transformation unit and the first switching element and the output terminal; and a fourth rectifier unit provided between a connection point of other end of the transformation unit and the second switching element and the o

Abstract: A multi-parallel magnetic-filed cancellation type transformer includes a plurality of coils which generate magnetic flux during energization and a core having a plurality of magnetic leg portions on which the coils are wound, and bases for fixing the magnetic leg portions. The plurality of coils are wound on the magnetic leg portions in such a manner that the magnetic flux generated from the coils are formed in the directions opposite to each other. A plurality of closed magnetic circuits of the magnetic flux are formed at the magnetic leg portions and the bases. The magnetic resistance of the closed magnetic circuits is homogeneous. Accordingly, the transformer can reduce the size thereof, and prevent the deterioration of electric power conversion efficiency.

Abstract: Combined type transformer includes: a transformer core; first and second coils provided with respect to the transformer core; first and second inductor cores provided around the first coil; and third and fourth inductor cores provided around the second coil. The transformer core and the first and second coils constitute a transformer, the first coil and the first and second inductor cores constitute a first inductor, and the second coil and the third and fourth inductor cores constitute a second inductor.

Abstract: A lever-type connector 10 includes female and male connector housings 41 and 11 which have respective connection terminals 50 and 51, and can be fitted together. A lock lever 17 is pivotally supported on the male connector housing 11, and engagement lock projections 46, formed on the female connector housing 41, are engaged with the lock lever 17, and in this condition the lock lever 17 is pivotally moved so as to fit the female and male connector housings 41 and 11 together. The lock lever 17 has at least one projection 27 serving as a contact point at which the lock lever contacts the male connector housing 11.

Abstract: A connector includes a rear cover which is fixed to a rear portion of an outer housing in non-contacting relation to an inner housing. A strain relief structure, including a wire bending portion for bending and holding wires, is provided at the rear cover. The connector further includes springs. The inner housing is mounted in the outer housing such that the inner housing 11 is urged forward by the springs.

Abstract: A booster circuit according to an embodiment of the present invention comprises: an input terminal; an output terminal; a common terminal; a transformation unit including first, the second, and the third windings, the windings wound in the same direction and connected in series; a first rectifier unit provided between the input terminal and a connection point of the first and the second windings; a second rectifier unit provided between the input terminal and a connection point of the second and the third windings; a first switching unit provided between one end of the transformation unit and the common terminal; a second switching unit provided between other end of the transformation unit and the common terminal; a third rectifier unit provided between a connection point of one end of the transformation unit and the first switching element and the output terminal; and a fourth rectifier unit provided between a connection point of other end of the transformation unit and the second switching element and the o

Abstract: In a pivotal lever-type connector, at the same time when a male connector housing is fitted into a predetermined position relative to a female connector housing, so that the female connector housing and the male connector housing are brought into a provisionally-fitted condition, distal end portions of elastic retaining arms, after abutting respectively against male connector housing-side inclining surfaces, are guided respectively onto female connector housing-side inclining surfaces, and slide on the respective female connector housing-side inclining surfaces in respective directions to decrease the distance therebetween, so that a pivotal lever is pivotally moved, thereby canceling the provisionally-fitted condition.

Abstract: In a slotless permanent magnet rotary electric machinery, comprising a substantially cylindrical rotor (53) incorporated with a permanent magnet (52), a stator iron core (54) surrounding the rotor; and a coil (55) provided between the rotor (53) and stator core (54) in a spaced relationship with respect to the rotor (53), the coil (55) comprises a plurality of turns which are shifted from one turn to another along the circumferential direction in a mutually overlapping manner; and the coil turns are formed by a conductor (60, 60a, 60b) having an elongated cross section, a long axis of the cross section extending in a radial direction. This provides rotary electric machinery which can significantly reduce loss in a high speed range without substantially increasing copper loss.

Abstract: In a pivotal lever-type connector, a pivotal lever includes a metallic pivotal lever body which is disposed generally in straddling relation to a hood portion of a female connector housing, and can be engaged with engagement projections of a male connector housing, and a synthetic resin-made pivotal movement operating portion mounted on the pivotal lever body to cover a pivotally-moving end portion of the pivotal lever body. The pivotal movement operating portion has synthetic resin-made elastic retaining arms molded integrally with a body of this operating portion.

Abstract: Disclosed is a catalyst for olefin polymerization comprising [I] a solid titanium catalyst component [S] comprising titanium, magnesium, halogen and an electron donor (b), which is obtained by bringing a solid adduct consisting of a magnesium compound and an electron donor (a) into contact with an electron donor (b) and a liquid titanium compound by at least one method selected from (A) a method of contacting the materials in a suspended state in the coexistence of an inert hydrocarbon solvent and (B) a method of contacting the material plural times individed portions and [II] an organometallic compound catalyst component [M] containing a metal selected from the groups I to III in the periodic table.

Abstract: A connector includes a rear cover which is fixed to a rear portion of an outer housing in non-contacting relation to an inner housing. A strain relief structure, including a wire bending portion for bending and holding wires, is provided at the rear cover. The connector further includes springs. The inner housing is mounted in the outer housing such that the inner housing 11 is urged forward by the springs.