Abstract: A connector fitting detection construction in which even if dirt, dust or the like is deposited on contacts, the contacts can be positively electrically connected together, thereby enhancing the reliability of a fitting detection function. In the connector fitting detection construction for detecting a fitted condition of a pair of connectors, a cantilever-like lock arm is provided on one connector housing, and the lock arm can be elastically flexed so that its free end can be moved in a direction generally perpendicular to a connector fitting direction. A short-circuiting electrode of a U-shape, having contact portions provided respectively on outer sides of pair of legs, is mounted on the lock arm, with the pair of legs disposed respectively on opposite sides of the lock arm.

Abstract: A tube for sperm washing and concentration. The tube is a glass tube 1 having an open end 11 and a bottom portion with a small diameter 12, and an elastic bladder 2 removably provided at the open end 11 of the tube 1. A vulnerable section 13 may be further provided to enable the bottom with small diameter 12 to be easily bent and cut. Contamination of the sperm by bacteria and remaining density gradient carrier are not caused.

Abstract: A vehicle provided with an engine 1 which generates a driving energy for the vehicle, planetary gears 4 and 6 comprising sun gears, planet gears and ring gears, motors 8 and 9 for respectively controlling the sun gears, and a clutch 14, the planet gears being connected to an input shaft driven by the engine and the ring gears connected to an output shaft for driving wheels, wherein gear ratios from the input shafts to the output shafts in the planetary gears 4 and 6 are set at a value different to each other. A stepless speed changing function which permits vehicular operation in a high engine efficiency region while minimizing an electrical energy loss is realized by a small-sized transmission using small-sized motors. The vehicle, which uses the transmission, can be operated in a high engine efficiency region while keeping an electrical energy loss to a minimum.

Abstract: A synchronous motor control system includes a synchronous motor 1, an inverter 3 and a controller 4 wherein a current differential detecting unit 13 detects a variation of a motor current when the three phases of the motor 1 is short circuited by the inverter 3, namely at the moment when a carrier wave in a PWM signal generator 9 assumes maximum or minimum value, in a calculating unit 14 a phase &ggr; from &agr; axis of a stationary coordinate system to a three phase short circuited current differential vector is calculated, a phase &dgr; is estimated from d axis to the three phase short circuited current differential vector by making use of d axis current id and q axis current iq on d-q axes coordinate system in the controller 4, thereafter the magnetic pole position &thgr; with respect to &agr; axis is calculated from the phases &ggr; and &dgr;, based on thus calculated magnetic pole position &thgr;, d-q axes control units 11, 7 and 8 are constituted to control the synchronous motor, thereby a highly reliab

Abstract: A power corresponding to an A/C voltage command id1* is applied in the d-axis direction of rotational coordinates of a stopped synchronous motor via a current control unit, a three-phase converting unit, and a power converter. Further, by using “an amplitude value of a current iq′ in the q-axis direction of the rotational coordinates generated in response to the A/C voltage command id1*” which is fed back and detected via a current detector and a dq converting unit, a field pole position estimation value &thgr;{circumflex over ( )} is converged. The field pole position is estimated by using the converged field pole position estimation value &thgr;{circumflex over ( )} as a true value of the field pole position &thgr; of the synchronous motor.

Abstract: A synchronous motor control system includes a synchronous motor 1, an inverter 3 and a controller 4 wherein a current differential detecting unit 13 detects a variation of a motor current when the three phases of the motor 1 is short circuited by the inverter 3, namely at the moment when a carrier wave in a PWM signal generator 9 assumes maximum or minimum value, in a calculating unit 14 a phase &ggr; from &agr; axis of a stationary coordinate system to a three phase short circuited current differential vector is calculated, a phase &dgr; is estimated from d axis to the three phase short circuited current differential vector by making use of d axis current id and q axis current iq on d-q axes coordinate system in the controller 4, thereafter the magnetic pole position &thgr; with respect to &agr; axis is calculated from the phases &ggr; and &dgr;, based on thus calculated magnetic pole position &thgr;, d-q axes control units 11, 7 and 8 are constituted to control the synchronous motor, thereby a highly reliab

Abstract: A vehicle provided with an engine 1 which generates a driving energy for the vehicle, planetary gears 4 and 6 comprising sun gears, planet gears and ring gears, motors 8 and 9 for respectively controlling the sun gears, and a clutch 14, the planet gears being connected to an input shaft driven by the engine and the ring gears connected to an output shaft for driving wheels, wherein gear ratios from the input shafts to the output shafts in the planetary gears 4 and 6 are set at a value different to each other. A stepless speed changing function which permits vehicular operation in a high engine efficiency region while minimizing an electrical energy loss is realized by a small-sized transmission using small-sized motors. The vehicle, which uses the transmission, can be operated in a high engine efficiency region while keeping an electrical energy loss to a minimum.

Abstract: In an arrangement having an electric power inverter 2 which applies a voltage to an AC motor 1 and a control unit 4 which calculates a voltage command value applied in PWM signals, detection use voltages Vup, Vvp and Vwp are applied in synchronism with PWM signal generation use carrier waves in the control unit 4 as well as motor currents iv and iv are detected in response to current detection pulses Pd in synchronism therewith. In a magnetic pole position detection unit 12, counter electromotive forces of the synchronous motor 1 are estimated from a relationship between the detection use voltages Vup, Vvp and Vwp and current difference vectors of the motor current to determine a magnetic pole position &thgr; through calculation. The determined magnetic pole position &thgr; is inputted to coordinate conversion units 8 and 11 and a motor speed detection unit 13.

Abstract: The present invention addresses a problem as to how to provide a motor control apparatus which has a magnetic pole position inferring means capable of inferring the position of a magnetic pole of a synchronous motor by adopting a simple method in a short period of time with a high degree of accuracy. In order to solve this problem, a signal id1* for inference use is applied and a peak value iqh of a response current iq′ is detected by an iq′ peak detecting unit. The peak value iqh is then supplied to a magnetic pole position inferring unit for inferring the position of the magnetic pole of the synchronous motor by carrying out multiplication processing.

Abstract: A vehicle provided with an engine 1 which generates a driving energy for the vehicle, planetary gears 4 and 6 comprising sun gears, planet gears and ring gears, motors 8 and 9 for respectively controlling the sun gears, and a clutch 14, the planet gears being connected to an input shaft driven by the engine and the ring gears connected to an output shaft for driving wheels, wherein gear ratios from the input shafts to the output shafts in the planetary gears 4 and 6 are set at a value different to each other. A stepless speed changing function which permits vehicular operation in a high engine efficiency region while minimizing an electrical energy loss is realized by a small-sized transmission using small-sized motors. The vehicle, which uses the transmission, can be operated in a high engine efficiency region while keeping an electrical energy loss to a minimum.

Abstract: An electrical connector assembly consists of a first connector having a driven member rotatably supported thereon and a resilient member provided between the first connector and the driven member; and a second connector having a drive means which engages with and drives the driven member into rotation to bias the resilient member, wherein the resilient member, when biased, produces a repulsion force and a drawing force in order, the repulsion force and the drawing force acting through the driven member on the second connector in directions of repelling and drawing the second connector, respectively. A reliable coupling with a low force and an improved working efficiency are attained.

Abstract: In an a.c. motor control method and apparatus, operations are carried out at a current controller and a voltage setting using interrupt signals generated in synchronism with maximum and minimum values of a carrier wave at a control device for controlling an inverter for driving an alternating current motor. In operations at the voltage setting part carried out using one of the interrupt signals, a carrier wave is corrected in such a manner that phases of voltage command values gradually come into synchronism with a carrier wave. An integral multiple of the period of the carrier wave becomes the period of the a.c. voltage and current control operation timing is carried out in synchronism with the carrier wave.

Abstract: A fitting structure for connectors includes a female connector 30, a male connector 40 and a hood assembly 10. In assembling, an assembling port of the connector 30 is assembled to an opening 18 of the hood assembly 10. The engagement and disengagement between the male and female connectors 40, 30 can be accomplished by reciprocatively moving slide members 13, 13 in the hood assembly 10 while guide pins 44 are being retained in guide grooves 14 of the slide members 13, 13. Respective interior dimensions A, B, D defining the assembling port are respectively larger than respective interior dimensions a, b, d defining the opening 18 of the hood assembly 10, a step 38 is produced in a boundary area between the hood assembly 10 and the female connector 30. Without entering the female connector 30 into the hood assembly 10, it is possible to fit the male connector 40 to the female connector 30 certainly.

Abstract: A control apparatus for a synchronous generator system has: a voltage instruction generator for generating voltage instructions (Vu*, Vv*, Vw*) based on an output power reference (P*) of the synchronous generator, currents (Iu, Iv) flowing through the synchronous generator and position information (&thgr;0, &ohgr;r) of magnetic poles of the synchronous generator; a zero crossing point detector for detecting a point that the voltage (Vu) of the synchronous generator passes through zero volt.; and a magnetic pole position calculator for calculating the information (&thgr;0, &ohgr;r) on the position of magnetic poles of the synchronous generator on the basis of the voltage instruction (Vu*) and the power reference (P*) when the synchronous generator is under the generation mode, and on the basis of an output signal of the zero crossing point detector when the synchronous generator is under the stand-by mode.

Abstract: A semiconductor IC including a resistance element on a circuit substrate. The resistance element includes a resistance layer formed on an insulating layer. The resistance layer is formed using a Si layer obtained by forming an a-Si layer, doping the a-Si layer with impurities, and heating the doped a-Si layer to diffuse the impurities while substantially preserving the fineness of the a-Si layer surface. Preferably, a SiN layer is provided lying beneath the resistance layer. A capacitor may be integrated on the same circuit substrate where the resistance element is formed. In this case, a lower electrode, a SiN dielectric layer, and an upper electrode are formed in this order to constitute a capacitor. The SiN dielectric layer of the capacitor is formed extending from a capacitor formation region to another region, so that the resistance layer of the resistance element is formed on the extending SiN dielectric layer.

Abstract: In a connector fitting construction, a male connector includes an exclusive-use housing having a slider receiving portion for slidably receiving a slider. A lock arm is provided at a widthwise-central portion of a lower portion of the slider receiving portion. A housing lock for retaining engagement with a female housing is formed on a lower surface of a front end of the lock arm. The slider is constituted by a first slide member and a second slide member, and the first slide member includes a pair of arms, an interconnecting portion interconnecting these arms, and abutment posts. An abutment portion is formed at a front end of each of the arms. The second slide member includes a retaining portion for retaining the housing lock at the front end of the lock arm, and an operating portion, which is operated when canceling the fitted condition, and a pair of retainer portions with which one ends of tension springs are engaged, respectively.

Abstract: A lead electrode (57) is formed to expose an active base region (61). On the lead electrode (57) is formed a lead electrode (64) for an emitter electrode via an insulation film (56). When a base contact hole (65') for exposing the lead electrode (57) and an emitter contact hole for exposing the lead electrode (64) are formed at the same time, total thickness of the insulation film on the lead electrode (64) is thinner than that of the insulation layer on the lead electrode (57), which results in excessive etching on a part of the surface of the lead electrode to form recess. The lead electrode (64) is led out to a LOCOS film to form the emitter contact hole in a region on the LOCOS film to expose the lead electrode (64). Therefore, the recess having been formed on the lead electrode (64) upon forming the emitter contact hole is made to form on the LOCOS film outside the emitter region. The recess prevents depth of the emitter region from dispersing.

Abstract: In an a.c. motor control method and apparatus, operations are carried out at a current controller and a voltage setting using interrupt signals generated in synchronism with maximum and minimum values of a carrier wave at a control device for controlling an inverter for driving an alternating current motor. In operations at the voltage setting part carried out using one of the interrupt signals, a carrier wave is corrected in such a manner that phases of voltage command values gradually come into synchronism with a carrier wave. An integral multiple of the period of the carrier wave becomes the period of the a.c. voltage and current control operation timing is carried out in synchronism with the carrier wave.

Abstract: A shielding-member-containing connector assembly (1) includes a female connector (2), and a male connector (3). A groove portion (5) is provided in the inside of a metal shell (4) shield-connected to a shielded electric wire (W) of the female connector (2). The outside of the metal shell (4) is covered with a shrinkable tube (36). The male connector (3) includes a shielding member (6) shield-connected to a shielded electric wire (W), a suitable number of resilient pieces (9) having engagement protrusions (10) extended to the outside of a male housing (8) which holds a male terminal (7), a slide member (11) slidable in an axial direction, the slide member (11) having a pressing wall (13), and a notch portion (12) from which the engagement protrusions (10) are projected is provided in the slide member (11).

Abstract: A motor control device for an AC motor driven by a power converter with a maximum output frequency more than 500 Hz has a digital arithmetic unit which performs current-feed back control of the AC motor up to a maximum output frequency of the power converter, and outputs an AC voltage command to the power converter. The digital arithmetic unit includes a voltage control signal calculating unit for calculating a vector sum of the d-axis current deviation from a first subtracting unit and the q-axis current deviation from a second subtracting unit based on the d-axis and q-axis phases from a phase calculating unit as well as for calculating a d-axis voltage control signal and a q-axis voltage control signal according to the calculated vector sum, and performs current integration control for the d-axis and q-axis using the calculated vector sum as an input value. The AC voltage command is calculated based on the d-axis voltage control signal and the q-axis voltage control signals.