Abstract: A magnetic tape cartridge includes a cartridge case, a pair of cylindrical hubs rotatably provided in the cartridge case, and a magnetic tape laid between the hubs and wound around outer peripheries of the hubs. Each of the hubs has an inner diameter portion provided with a height-position determining member. The height-position determining member determines a height position of the hub in the magnetic tape cartridge by contacting a driving shaft inserted in the hub when the magnetic tape cartridge is mounted in a magnetic recording and reproducing apparatus.

Abstract: There is provided a current tracking PWM control circuit that directly generates PWM signals such that inverter output currents id, iq track PWM current references id**, iq**, using the results of comparison of the inverter output currents id, iq and PWM current references id**, iq**, in which, if current references id*, iq* exist, the result of adding the original current reference iq* and a correction signal iqC*, obtained by amplifying the deviation (iq*-iq) of the current reference iq* and iq, is used as the PWM current reference iq** on the q axis side for performing current control, but, in respect of the d axis side, the original current reference id* is used directly as the PWM current reference id** for performing current control.

Abstract: There is provided a current tracking PWM control circuit that directly generates PWM signals such that inverter output currents id, iq track PWM current references id**, iq**, using the results of comparison of the inverter output currents id, iq and PWM current references id**, iq**, in which, if current references id*, iq* exist, the result of adding the original current reference iq* and a correction signal iqC*, obtained by amplifying the deviation (iq*-iq) of the current reference iq* and iq, is used as the PWM current reference iq** on the q axis side for performing current control, but, in respect of the d axis side, the original current reference id* is used directly as the PWM current reference id** for performing current control.

Abstract: A magnetic tape cartridge includes a cartridge case, a pair of cylindrical hubs rotatably provided in the cartridge case, and a magnetic tape laid between the hubs and wound around outer peripheries of the hubs. Each of the hubs has an inner diameter portion provided with a height-position determining member. The height-position determining member determines a height position of the hub in the magnetic tape cartridge by contacting a driving shaft inserted in the hub when the magnetic tape cartridge is mounted in a magnetic recording and reproducing apparatus.

Abstract: A control system for a synchronous machine including a converter for converting DC voltage to AC voltage or AC voltage to DC voltage. The synchronous machine is driven by the converter. The control system further includes a magnetic pole position presuming device for performing a presuming operation to presume a magnetic pole position of the synchronous machine based on high-frequency components of a voltage applied to the synchronous machine and a current flowing into the synchronous machine, and a control device for controlling the converter based on the magnetic pole position presumed by the magnetic pole position presuming device. The control device controls the converter so as to contain significant high-frequency components in the voltage or the current used in the presuming operation when a mean voltage or a mean current output from the converter is spatially in a region close to a straight line containing starting and ending points of non-zero voltage vector output from the converter.

Abstract: The invention proposes a tape drive apparatus, tape extraction apparatus and tape cartridge that enable a reliable chucking and chucking release, and a stable carrying of a tape being extracted from a cartridge.

Abstract: A control system for a synchronous machine including a converter for converting DC voltage to AC voltage or AC voltage to DC voltage. The synchronous machine is driven by the converter. The control system further includes a magnetic pole position presuming device for performing a presuming operation to presume a magnetic pole position of the synchronous machine based on high-frequency components of a voltage applied to the synchronous machine and a current flowing into the synchronous machine, and a control device for controlling the converter based on the magnetic pole position presumed by the magnetic pole position presuming device. The control device controls the converter so as to contain significant high-frequency components in the voltage or the current used in the presuming operation when a mean voltage or a mean current output from the converter is spatially in a region close to a straight line containing starting and ending points of non-zero voltage vector output from the converter.

Abstract: A tape drive apparatus, tape extraction apparatus and tape cartridge that enable a reliable chucking and chucking release, and a stable carrying of a tape being extracted from a cartridge. The apparatus includes a carrying mechanism for extracting the tape as a recording medium from the cartridge where the magnetic tape is stored, and for carrying the magnetic tape to be wound up onto a takeup reel provided on the drive apparatus.

Abstract: The invention proposes a tape drive apparatus, tape extraction apparatus and tape cartridge that enable a reliable chucking and chucking release, and a stable carrying of a tape being extracted from a cartridge.

Abstract: The invention proposes a tape drive apparatus, tape extraction apparatus and tape cartridge that enable a reliable chucking and chucking release, and a stable carrying of a tape being extracted from a cartridge.

Abstract: The invention proposes a tape drive apparatus, tape extraction apparatus and tape cartridge that enable a reliable chucking and chucking release, and a stable carrying of a tape being extracted from a cartridge.

Abstract: A tape reel in which the reliability while running a magnetic tape at high speed is improved and a tape cartridge including the same. By configuring an annular chucking gear (152b) formed in a center section of a bottom surface of a lower flange (152) of a tape reel (150) with a perpendicular wall, idling and floating of the tape reel is suppressed, and thus, the running stability and linearity of the magnetic tape during high-speed rotation of the tape reel (150) are secured, and the reliability of the tape cartridge with regard to high speed operations is improved.

Abstract: There is provided a recording and/or reproducing apparatus including: a cartridge loading member into which is loaded a tape cartridge having a magnetic tape provided with a leader block on one end; a take-up mechanism for winding the magnetic tape; a carrying mechanism for carrying a tape pulling member, which engages with the leader block and pulls the magnetic tape from the tape cartridge, between the tape cartridge and the take-up mechanism; and a magnetic head mechanism for recording or reproducing signals. An area in which the cartridge loading member is formed, and an area in which the take-up mechanism, the carrying mechanism and the magnetic head mechanism are formed are divided by a partition, and the partition has an opening, and a shutter mechanism for shutting the opening. Thus, a recording and/or reproducing apparatus capable of preventing dust and the like from entering into the drive area is provided.

Abstract: A single-reel tape cartridge includes a leader block and a take-up reel disposed inside a drive apparatus that are provided with retaining members so that the leader block is firmly positioned and rattling thereof is prevented. A pair of changer grips which extend from end to end of a housing of the cartridge in the vertical direction are formed at two corners of the cartridge housing. In addition, a memory module, which stores the management information for the tape-like recording medium and which is used for radio communication, is disposed at an angle in one of the corners of the cartridge so that a communication antenna of the memory module faces at least two directions. In addition, the leader tape is provided with a striped portion used for identifying the medium, and the cartridge housing is closed by a shutter used for disengaging the reel lock.

Abstract: A tape drive uses a single-reel type tape cassette, and includes a pull-back guide shaft for pulling back a tape-shaped recording medium at a predetermined position and a pair of moveable guide pins, whereby the tape-shaped recording medium is positioned between the paired guide pins is wound around the drum. A tension device applies a predetermined tension when the tape-shaped recording medium has been drawn out and a tape path has been formed. A non-winding fast feed mode is set in which the tape-shaped recording medium is fed at high speed under a predetermined tension wherein the tape-shaped recording medium is not wound around the drum. The tension device has a tension regulator lever having two guide shafts for both winding feed mode and non-winding feed mode.

Abstract: There is provided a recording and/or reproducing apparatus including: a cartridge loading member into which is loaded a tape cartridge having a magnetic tape provided with a leader block on one end; a take-up mechanism for winding the magnetic tape; a carrying mechanism for carrying a tape pulling member, which engages with the leader block and pulls the magnetic tape from the tape cartridge, between the tape cartridge and the take-up mechanism; and a magnetic head mechanism for recording or reproducing signals. An area in which the cartridge loading member is formed, and an area in which the take-up mechanism, the carrying mechanism and the magnetic head mechanism are formed are divided by a partition, and the partition has an opening, and a shutter mechanism for shutting the opening. Thus, a recording and/or reproducing apparatus capable of preventing dust and the like from entering into the drive area is provided.

Abstract: Data is transmitted to a main control device via sensing means such as temperature sensors, each having a memory means in which the ID code is stored, and via transmitting/receiving means such as switching elements. There is a stand-by period in the operation of the main control device after the main control device issues a command to start a sensing operation until the main control device issues a command to perform a read operation. The main control device receives power through a signal line the voltage of which is kept at a high level during the stand-by period. Thus, an equipment sensing system and an equipment control device which enable reliable and quick sensing, cost reduction, smooth control, and simplified wiring are provided.

Abstract: The invention proposes a tape drive apparatus, tape extraction apparatus and tape cartridge that enable a reliable chucking and chucking release, and a stable carrying of a tape being extracted from a cartridge.

Abstract: When a memory in cassette (MIC) in a loaded tape cassette can successfully be accessed, an MIC type stored in the MIC is detected to judge a data format the tape cassette has. To this end, the tape cassette is adapted such that the data format or the loaded tape cassette can be identified without detecting an identification hole formed in the tape cassette. Thus, it is possible to easily accommodate any future extension of the data format.

Abstract: A leader block of a single-reel tape cartridge and a take-up reel disposed inside a drive apparatus are provided with retaining members so that the leader block is positioned and rattling thereof is prevented.