Abstract: A design workflow construction apparatus is provided for supporting design of an object having a plurality of design elements. In constructing the design workflow, the apparatus uses input variables, design variables, and intermediate variables. The design workflow construction apparatus includes means for acquiring object design elements and means for determining an order of designing the object design elements. The apparatus also includes means for determining the important design variables.

Abstract: A design system (1) is provided with a function of acquiring a design specification of an object to be designed and an evaluation index for evaluating a value of the object to be designed in the design specification; a function of acquiring profile data of the object to be designed; a function (design order determining section (12)) of extracting entity design elements and important design variables from the profile data and prioritizing the entity design elements and the important design variables so as to construct a design workflow; a function (evaluation approach construction section (13)) of constructing an evaluation formula for performance/evaluation of a design result of each of the entity design elements in conformity with the design workflow; a function of finding an appropriate solution by performing automatic optimization while evaluating the design result with use of the evaluation index in accordance with the design workflow with which the evaluation formula is associated; and a function of outp

Abstract: A motor-driving circuit is used for driving a motor which is of a type including a rotor whose rotating shaft has a permanent magnet used for generating magnetic flux, and an armature having three-phase windings wound around an iron core to form Y-connection windings. The motor-driving circuit includes a circuit for short-circuiting two of the three leads extending from the Y-connection windings, a rotational position detector for detecting a rotational position of the motor, and a control circuit for causing an exciting an exciting current to flow between the short-circuited leads and the remaining lead, in such a manner that the rotational position detected by the rotational position-detecting means is moved to a designated rotational position which is corresponding to an external input which is within a narrow angular range.

Abstract: A motor-driving circuit is used for driving a motor which is of a type including a rotor whose rotating shaft has a permanent magnet used for generating magnetic fluxes, and an armature having three-phase windings wound around an iron core to form Y-connection windings. The motor-driving circuit includes a circuit for short-circuiting two of the three leads extending from the Y-connection windings, a rotational position detector for detecting a rotational position of the motor, and a control circuit for causing an exciting an exciting current to flow between the short-circuited leads and the remaining lead, in such a manner that the rotational position detected by the rotational position-detecting means is moved to a designated rotational position which is external input and is within a narrow angular range.

Abstract: A lead frame is conveyed along a convey direction in a convey path filled with a reducing gas. A semiconductor pellet is placed on the lead frame at a die bonding portion. A bonding wire made of copper or a copper alloy is supplied to the next wire bonding portion. The lower end of the bonding wire is melted with an oxyhydrogen torch surrounded by an air curtain, thereby forming a ball. The bonding wire is guided into the convey path by a capillary. The ball is thermocompressed to an electrode pad of the semiconductor pellet. The other end of the bonding wire is fused and thermocompressed against the outer lead of the lead frame at a postbonding portion. The bonding wire is thus looped between the semiconductor pellet and the outer lead.