What is claimed is:
1. A color reproduction characteristic display apparatus for displaying color reproduction characteristics wherein an association between coordinates of a first color space defining a color on image data and coordinates of a second color space defining a color on an image are defined in accordance with a device for mediating between the image data and the image, said color reproduction characteristic display apparatus comprising:
a range designation section for designating a desired coordinate range in said first color space in accordance with an operation; and
an image display section for displaying a color reproduction image in which there are plotted coordinate points on said second color space associated with coordinates within the coordinate range designated by said range designation section of coordinates of lattice points wherein said first color space is partitioned as a lattice.
2. A color reproduction characteristic display apparatus according to claim 1, wherein said image display section optionally displays the color reproduction image on a two-dimensional display basis or a three-dimensional display basis in accordance with an operation.
3. A color reproduction characteristic display apparatus according to claim 1, further comprising a display plot designation section for designating a desired point of points plotted on the color reproduction image in accordance with an operation,
wherein said image display section displays the color reproduction image and in addition coordinate values on said first color space and coordinate values on said second color space, which correspond to the point on the color reproduction image designated by said display plot designation section.
4. A color reproduction characteristic display apparatus according to claim 1, further comprising a display plot designation section for designating a desired point of points plotted on the color reproduction image in accordance with an operation,
wherein said image display section displays the color reproduction image and in addition information as to a distance in said second color space, between two points on the color reproduction image designated by said display plot designation section.
5. A color reproduction characteristic display apparatus according to claim 1, wherein said image display section has a mode wherein a plurality of color reproduction images associated with a plurality of output devices is displayed on a superposing basis.
6. A color reproduction characteristic display program storage medium storing a color reproduction characteristic display program which causes a computer to operate as a color reproduction characteristic display apparatus for displaying color reproduction characteristics wherein an association between coordinates of a first color space defining a color on image data and coordinates of a second color space defining a color on an image are defined in accordance with a device for mediating between the image data and the image, said color reproduction characteristic display program comprising:
a range designation section for designating a desired coordinate range in said first color space in accordance with an operation; and
an image display section for displaying a color reproduction image in which there are plotted coordinate points on said second color space associated with coordinates within the coordinate range designated by said range designation section of coordinates of lattice points wherein said first color space is partitioned as a lattice.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A method of indirect position estimation in three-phase switched reluctance machines comprising:
providing a three-phase switched reluctance machine, said machine comprising a rotor and three phases; producing data about the machine;
setting a plurality of threshold current values for at least a first phase; and sensing rotor position by;
applying a pulse voltage train sufficient to induce a pulse current in said first phase, said pulse current having some maximum amperage amplitude, comparing the maximum amperage amplitude of said pulse current to at least one of the plurality of threshold current values for the first phase, and determining the sector of the rotor based upon the maximum amperage amplitude of the pulse current in the first phase.
2. The method of claim 1, wherein said setting a plurality of threshold current values for at least a first phase comprises, setting a high current threshold and a low current threshold for any of the three phases.
3. The method of claim 2, wherein said setting a plurality of threshold current values for at least a first phase comprises,
setting a high current threshold for each of the three phases; and
setting a low current threshold for each of the three phases.
4. The method of claim 3, wherein said producing comprises, determining a maximum induced current at a plurality of angular positions in at least a first phase.
5. The method of claim 4, wherein said producing comprises, determining a maximum current at a plurality of angular positions in each of at least a first phase and a second phase.
6. The method of claim 5, wherein said producing comprises, determining a maximum current at a plurality of angular positions in each of the three phases.
7. The method of claim 6, wherein said producing comprises, for each of the three phases,
conducting a first testing event at a first angular position, said first testing event comprising:
applying a test pulse voltage across the phase to induce a current, and
determining the maximum induced current in the phase, and allowing said induced current to drop to zero.
8. The method of claim 7, further comprising, for each of the three phases, conducting a second testing event at a second angular position, said second testing event comprising:
applying a test pulse voltage across the phase to induce a current, and
determining the maximum induced current in the phase.
9. The method of claim 8, wherein said rotor is in motion during said testing event.
10. A method of indirect position estimation in three-phase switched reluctance machines comprising:
providing a three-phase switched reluctance machine, said machine comprising a rotor and three phases;
producing data about the machine, wherein said producing comprises, for each of the three phases;
conducting a first testing event at a first angular position while said rotor is in motion, said first testing event comprising,
applying a test pulse voltage across the phase to induce a current,
determining the maximum induced current in the phase, and
allowing said induced current to drop to zero; and
conducting a second testing event at a second angular position while said rotor is in motion, said second testing event comprising,
applying a test pulse voltage across the phase to induce a current, and
determining the maximum induced current;
setting threshold current values for each of the three phases, wherein said setting comprises,
setting a high current threshold for each of the three phases;
setting a low current threshold for each of the three phases; and sensing rotor position by;
applying a sensing voltage sufficient to induce a pulse current having some maximum amperage amplitude in each of the three phases, for each phase, comparing the maximum amperage amplitude of said pulse current with respect to the thresholds for the phase, determining the sector of the rotor based upon the maximum amperage amplitude of the pulse current in at least one phase.
11. An apparatus for indirect position estimation in three-phase switched reluctance machines, where said three-phase switched reluctance machines comprise a rotor having a plurality of sectors and three phases, said apparatus comprising:
a voltage source operatively engaged with a phase and adapted to apply a pulse voltage to said phase sufficient to induce a pulse current having some maximum amperage amplitude in said phase;
a current sensing circuit operatively engaged with a phase to output data or a signal representative of the sensing current in said phase, said current sensing circuit being adapted to output data or a signal representative of the motoring current in said phase, said current sensing circuit comprising a first amplifier having a gain and being adapted for processing motoring phase currents, and a second amplifier having a gain, said second amplifier being adapted for processing sensing pulse currents, and said gain of said second amplifier being ten or more times larger than said gain of said first amplifier; and
computing device operatively connected to said current sensing circuit.
12. The apparatus for indirect position estimation in three-phase switched reluctance machines of claim 11 wherein, said computing device is adapted to access data regarding a low threshold; said computing device is adapted to access data regarding a high threshold; and
said computing device is adapted to determine the sector of the rotor based upon a comparison of the maximum amperage amplitude of the induced pulse current with the low threshold and the high threshold.
13. The apparatus for indirect position estimation in three-phase switched reluctance machines of claim 12 wherein said computing device comprises a signal interface.
14. The apparatus for indirect position estimation in three-phase switched reluctance machines of claim 13 wherein said signal interface is operably engaged to an interface circuit.