摘要:
The invention relates to an image-formation lens system well balanced among cost reductions, size reductions and performance improvements and an imaging system incorporating that lens system. The image-formation lens system in the imaging system is a zoom lens system that comprises at least three lens groups including a first lens group G1 of positive power, a second lens group G2 of positive power and a third lens group G3 of negative power, wherein zooming is carried out by varying the spacing between adjacent lens groups. The zoom lens system comprises a total of up to 8 lenses, and satisfies the following conditions: 0.07
摘要:
A rolling bearing with sensor includes an inner ring, an outer ring, a plurality of rolling elements disposed between the inner and outer rings, and a sensor having a detecting part detecting a state of the rolling bearing and a circuit part connected to the detecting part. The detecting part and the circuit part are attached to the rolling bearing.
摘要:
The invention relates to an image-formation lens system well balanced among cost reductions, size reductions and performance improvements and an imaging system incorporating that lens system. The image-formation lens system in the imaging system is a zoom lens system that comprises at least three lens groups including a first lens group G1 of positive power, a second lens group G2 of positive power and a third lens group G3 of negative power, wherein zooming is carried out by varying the spacing between adjacent lens groups. The zoom lens system comprises a total of up to 8 lenses, and satisfies the following conditions: 0.07
摘要:
Apparatus for generating a motion control algorithm for the control of an AC electric machine, the apparatus comprising a motion control engine comprising a motion control sequencer, a motion control program memory, a port memory, a plurality of motion control modules, and a plurality of motion peripheral modules, the motion control sequencer executing a sequence of instructions stored in the motion control program memory directing the sequencer to execute motion control modules and motion peripheral modules in a specified sequence and with a specified connection of module inputs and module outputs and operational parameters stored in the port memory to generate the motion control algorithm. A microcontroller may be coupled to the motor control program memory and the port memory for monitoring the output of the motion control engine.
摘要:
Stator cores for a homo-polar magnetic bearing, wherein toothed ends of stator cores around a rotor form N poles and S poles adjacent in the axial direction, and the method of manufacturing them. The stator core 10 is provided with protrusions 11 of adjacent N and S poles extended circumferentially so as to be in contact with or in close proximity to each other, and is composed of U-shaped laminated steel sheets interleaved with an insulating material, of which the center side is open when viewed from the centerline side. In addition, the core is composed of a first yoke, a second yoke and a stem unit that is a magnetic body placed and fixed between the yokes, and at least the stem unit is composed of a magnetic material powder, solidified in resin.
摘要:
Stator cores for a homo-polar magnetic bearing, wherein toothed ends of stator cores around a rotor form N poles and S poles adjacent in the axial direction, and the method of manufacturing them. The stator core 10 is provided with protrusions 11 of adjacent N and S poles extended circumferentially so as to be in contact with or in close proximity to each other, and is composed of U-shaped laminated steel sheets interleaved with an insulating material, of which the center side is open when viewed from the centerline side. In addition, the core is composed of a first yoke, a second yoke and a stem unit that is a magnetic body placed and fixed between the yokes, and at least the stem unit is composed of a magnetic material powder, solidified in resin.
摘要:
A motor drive including an input for alternating current, a rectifier circuit, an inverter, an output which provides the controlled alternating current to drive a motor; and an active EMI filter for eliminating common mode noise in the motor drive which employs a magneto-resistive sensor. In the filter, a pair of lead frame bars which are connectable to the current path of the motor drive and an MR sensor in the form of a Wheatstone bridge are fabricated on a semiconductor die, with the bridge in contact with and straddling the lead frame bars. The bridge elements are so oriented that opposed elements in the bridge are responsive to changes in magnetic flux in a first sense to exhibit an increase in resistance, and adjacent elements in the bridge are responsive to changes in magnetic flux in a second sense opposite to the first sense to exhibit an increase in resistance. This allows the lead frame bars to be connected in such a manner that the common mode noise signals in the motor drive current path cause flux variations which reinforce the sensor output, while flux variations associated with other signals tend to cancel.
摘要:
The present invention is directed to split bodies for assembling a synthetic resin blower fan by a hollow article molding process. The split bodies have a first split body which includes a circular base portion and vanes extending radially and a second split body assembled on top of said first split body and is in a doughnut-shaped cap with an air inlet at the center thereof. Air channels are formed between adjacent pair of the vanes. The second split body includes a plurality of grooves which are formed on an inner surface opposite from the first split body in an assembled state. Each of the grooves extends radially along an edge of a corresponding vane and is adapted to be closed by the edge so as to define a flow path for allowing a molten synthetic resin to pass therethrough. The second split body further includes an injection hole which is in fluid communication with an upstream end of the flow path with respect to the flow direction of the molten synthetic resin to be injected so as to allow the molten synthetic resin to be injected into the flow path therethrough.
摘要:
The present invention is directed to a method for joining two parts together and the unit derived therefrom. The method comprises the steps of mating a first flange portion extending along an entire periphery of a first part with a second flange portion extending along an entire periphery of a second part; overfolding a margin portion extending along an outer edge of the second flange portion to join the first part and the second part; a linear ridge being formed on at least one of the first flange portion, the second flange portion and the margin portion, the linear ridge extending along an entire periphery of the at least one portion and extending toward the first flange portion, the second flange portion or the margin portion which is opposed to the linear ridge in the overfolded state; and compressing the margin portion to plastically deform the linear ridge so as to form a seal between the two parts.
摘要:
A real image type view finder comprising an objective optical system which has positive refractive power and forms an intermediate image, an image erecting optical system which erects the intermediate image and an eyepiece optical system which leads the intermediate image to an observer's eye, in which the objective optical system comprises a first positive lens unit, a second negative lens unit, a third negative lens unit and a fourth positive lens unit, moves the second lens unit and the third lens unit for a magnification change, has a vari-focal ratio on the order of 4, and has favorable optical performance over an entire zooming region.