摘要:
A multistage type tube refrigerator comprising a regenerator-side pressure oscillation generator, first regenerator connected to the regenerator-side pressure oscillation generator, first cold head connected to the low temperature side of the first regenerator, a first pulse tube having one end connected to the first cold head and the other end connected by way of a first flow regulating mechanism to a first pulse tube-side phase shifter, second regenerator having one end connected to the first cold head and the other end connected to the second cold head, a second pulse having one end connected to the second cold head and the other end connected to second pulse tube-side phase shifter by way of second flow regulating mechanism, in which the first pulse tube-side phase shifter and the second pulse tube-side phase shifter are controlled independently of each other. Further, the pulse tube refrigerator operated while setting the phase angle of the pulse tube-side phase shifter to -50.degree. to -120.degree. relative to the regenerator-side pressure oscillation generator, while setting the phase angle of the second pulse tube-side phase shifter 15.degree. to -90.degree..
摘要:
A current-circulating cycloconverter includes a positive converter and a negative converter connected in anti-parallel with each other through a DC reactor. A load is connected to an intermediate tap of the DC reactor. When a load current flowing to the load is smaller than a predetermined value, a circulating current flowing through the positive and negative converters is held at a minimum required value. A circulating current is caused to additively flow for canceling a voltage drop produced across the DC reactor when the load current exceeds the predetermined value.
摘要:
In induction motor driven by a voltage-type inverter, the torque current component is determined by detecting a primary current flowing to the induction motor. On the basis of the torque current component determined, the output voltage and frequency of the voltage-type inverter are controlled. Additionally, the rotational speed of the induction motor is estimated on the basis of the detected torque current component and the speed of the induction motor is controlled such that the estimated speed signal coincides with a speed command signal.
摘要:
There is provided an actuator including a motor and a case adapted to house the motor. In the actuator, an output shaft of the motor is supported by a structured configured such that an elastic member is disposed between the case and at least one end of the output shaft, wherein the elastic member is in contact with a portion of the case in an engaging manner whereby the elastic member is prevented from shifting relative to the case in the rotation direction of the output shaft, and also wherein the elastic member is in contact with a portion of the motor in an engaging manner whereby a body of the motor is prevented from shifting relative to the elastic member in the rotation direction of the output shaft.
摘要:
A mobile terminal device that executes a function setting operation is disclosed. When a memory card that stores various file types is inserted into the mobile terminal device, a decision processing portion reads identification information of the memory card and compares the identification information with stored identification information in a storing portion. If the read identification information and the stored identification information coincide, a function setting controlling portion executes a resetting of a display or of a sound function of the mobile terminal device by using the various file types stored in the memory card.
摘要:
An electronic document storage and reference system, for providing an electronic document storage apparatus for performing a document transfer processing effectively, and providing means for restoring and enabling the transferred electronic document for a reference on an apparatus other than the electronic document storage apparatus, comprises a unit for transferring from the electronic document storage apparatus to an archive media an electronic document stored for more than a specified period of time, a unit for emigrating, from the electronic document storage apparatus, the information required for referring to the electronic document transferred to the archive media and a unit for restoring the transferred electronic document from the archive media for enabling the electronic document to be referred to.
摘要:
In a wireless network including a wireless LAN device having a base station function compatible with the IEEE 802.11e standard and a wireless LAN device having a terminal function compatible with the standard, a band-guaranteed data reception check timer 104′ starts measuring a preset time when the terminal receives band-guaranteed data from the base station after a band acquisition response signal is transmitted from the base station to the terminal and a band-guaranteed data transfer is established between the base station and the terminal. If band-guaranteed data is not received from the base station before the measurement of the preset time is completed, the terminal determines that the wireless network connection has been disconnected to request the base station for re-connection of the wireless network after passage of the preset time. Therefore, even if the power supply to the base station is cut off to disconnect the wireless network connection between the wireless LAN devices, it is possible to immediately detect the disconnection of the wireless network connection and to re-connect the wireless network.
摘要:
In a method of detecting synchronization loss in a stepping motor, a means for applying either control current or control voltage to a coil of each phase to thereby drive a stepping motor and a means for individually measuring a back EMF voltage induced at the coil of each phase are employed, wherein application of either the control current or the control voltage at the coil of each phase is halted by turns phase by phase for such a short time period as not to affect rotation of a rotor of the stepping motor at a predetermined timing within one step period of the rotor, the back EMF voltage at the coil is measured during the short time period, and the stepping motor is judged to lose synchronization when the measurement result of the back EMF voltage at the coil of at least one phase satisfies a detection criterion.
摘要:
In a semiconductor device, an interlevel insulating film formed between a Cu interconnection, formed by damascene, and an upper metal interconnection layer on it has a multilayered structure made up of a Cu diffusion preventive insulating layer and another insulating film. The Cu diffusion preventive insulating layer has a multilayered structure made up of not less than two layers. A method for manufacturing the semiconductor device is also disclosed.
摘要:
A data transceiver includes: at least first and second encrypting/decrypting means each for encrypting and decrypting data; and transceiver means for transmitting and receiving data. In a first transmission mode, first transmission data encrypted by the first or second encrypting/decrypting means is transmitted by the transceiver means. In a first reception mode, first received data received by the transceiver means is decrypted by the first or second encrypting/decrypting means. In a second transmission mode, second transmission data decrypted by the first encrypting/decrypting means is encrypted by the second encrypting/decrypting means and then is transmitted by the transceiver means. In a second reception mode, second received data received by the transceiver means is decrypted by the second encrypting/decrypting means and then is encrypted by the first encrypting/decrypting means.