摘要:
A multiple disc changer apparatus has an elastic support mechanism for supporting the recording/reproducing unit on a main body of the apparatus and includes a locking mechanism for controlling the elastic support of the elastic support mechanism when a disc is loaded on the recording/reproducing unit by a chucking mechanism.
摘要:
A recording and/or reproducing apparatus for discs includes a housing unit housing a large number of discs, a recording and/or reproducing unit on which one of the discs held within a large number of disc holders provided in the housing unit is selectively loaded, and a transporting mechanism for transporting the disc held within a selected one of the holders of the housing unit to the recording and/or reproducing unit. The disc transporting mechanism detects whether or not the disc is held in the holder. A detection switch is activated when no disc is present in the holder. The housing unit includes a plurality of the holders positioned radially such that the disc surfaces are held upright. The selected disc held in the holder of the disc transporting mechanism is transported by the transporting mechanism in the upright position to the disc reproducing unit and loaded therein.
摘要:
A recording and/or reproducing apparatus for discs including a housing unit housing a large number of discs, a recording and/or reproducing unit on which one of the discs held within a large number of disc holders provided in the housing unit is selectively loaded and a transporting mechanism for transporting the disc held within a pre-set one of the holders of the housing unit to the recording and/or reproducing unit. In the course of transporting the disc, the disc transporting mechanism detects whether or not the disc is held in the holder. The housing unit include a plurality of the holders for radially holding the discs with the disc surfaces being erected upright. The disc held in the holder is transported by the transporting mechanism in the upstanding position as far as the disc reproducing unit and there loaded. The recording and/or reproducing apparatus for disc-shaped recording media has a group designating unit for designating the information of a desired one of the recording media housed within the housing unit and the air information recorded on such desired disc-shaped recording medium and grouping the designated information for classing the large number of the recording media into several groups.
摘要:
When input equipment is instructed by a remote control unit on the basis of a display of a monitor, a data signal is transmitted from a microcomputer of an AV amplifier to a microcomputer of a CD changer. When the signal is received by a microcomputer of the CD changer, display data is formed in the microcomputer of the CD changer on the basis of data in a memory and is outputted. In the AV amplifier, a switch is switched to the CD changer side. A cursor is formed by the microcomputer of the AV amplifer, the cursor and display data from the CD changer are synthesized by an image synthesizing circuit and displayed on the monitor. When an instruction is generated by the remote control unit on the basis of the display on the monitor, position coordinates of the cursor on the picture plane are generated from the microcomputer of the A/V amplifier to the microcomputer of the CD changer. On the basis of the display data and the position coordinates, the CD changer is controlled by its microcomputer. When a predetermined position on the picture plane is instructed by the remote control unit, the control is returned to the AV amplifier.
摘要:
An electric drive control device is provided with an electric machine having an asymmetrical salient pole, a current detecting portion, a phase converting device that converts the detected current into an axis current, and a current controlling device which generates a voltage command value based on the axis current and a current command value of the axis current. The current controlling device generates the voltage command value in response to the detected current and an offset angle of the center of a magnetic flux density distribution occurring at the salient pole, with respect to the center of an opening angle of the salient pole. In this case, the current controlling device generates a voltage command value corresponding to the detected current and the offset angle so the electrical characteristics are the same as when an electric machine having a symmetrical salient pole is used.
摘要:
An improved printing magnet drive device for use in a printing apparatus, such as line printer, is disclosed. The improvement comprises a constant voltage control means in which an output terminal voltage of a transistor is compared with a reference voltage and the comparison result is fed back to the transistor so as to control the output terminal voltage of the transistor to a predetermined value, whereby the voltage applied to the printing magnets is substantially maintained unchanged.
摘要:
An axial gap rotating electrical machine is provided with permanent magnets and cores in a rotor. The permanent magnets are oriented such that magnetization surfaces face in the circumferential direction of the rotor. The cores are arranged alternately with the permanent magnets in the circumferential direction of the rotor. The amount of magnetic flux on the outside in the radial direction of the rotor is made greater than the amount of magnetic flux on the inside in the radial direction of the rotor. As a result, the magnetic flux density at the rotor cores can be made substantially constant in the radial direction of the rotor and torque output with respect to the size of the permanent magnets is improved by preventing magnetic saturation of the cores.
摘要:
An electric drive control device is provided with an electric machine having an asymmetrical salient pole, a current detecting portion, a phase converting device that converts the detected current into an axis current, and a current controlling device which generates a voltage command value based on the axis current and a current command value of the axis current. The current controlling device generates the voltage command value in response to the detected current and an offset angle of the center of a magnetic flux density distribution occurring at the salient pole, with respect to the center of an opening angle of the salient pole. In this case, the current controlling device generates a voltage command value corresponding to the detected current and the offset angle so the electrical characteristics are the same as when an electric machine having a symmetrical salient pole is used.
摘要:
An axial gap electric rotary machine includes a rotor and a stator which face each other with an axial gap therebetween. The rotor includes permanent magnets which are arranged with their magnetic poles spaced around the circumference of the rotor, with the magnetic poles of adjacent permanent magnets being opposite each other. The permanent magnets and rotor cores are alternately arranged around the circumference of the rotor. Consequently, north poles and south poles are alternately formed at a surface of the rotor facing the stator, and reluctance of a magnetic path which passes through a permanent magnet is larger than reluctance of a magnetic path which does not pass through the permanent magnet, whereby the functions of a reluctance type rotary machine and a permanent magnet synchronous machine are combined in a compact structure.
摘要:
A device for measuring a surface potential at a photosensitive body including: a potential sensor for measuring surface potentials at a plurality of positions on the photosensitive body; a plurality of sample hold circuits; and an adder for adding each measured surface potential held in each sample hold circuit, or an adder which adds up each measured surface potential and average the sum. The addition or averaging of the measured values serves to eliminate eccentricity-induced errors and noise in the surface potential measurements, thereby allowing a correct surface potential to be obtained.