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US 7,841,451 B2Granted
Non-contact running type elevator
AssigneeToshiba Elevator Kabushiki Kaisha
InventorHiroaki Ito
Life of this patent
Estimating the term…
Abstract
In an elevator including a guide apparatus which levitates the car from a guide rail by an effect of magnetic force and non-contactly runs and guides the car, the guide apparatus is controlled in a manner to generate magnetic force with respect to at least two of movement axes of the car. In this case, control is executed with respect to only some of the movement axes at a time of start of guide, and then control is executed with respect to the other movement axes after passing of a predetermined time from the start of the guide.
Claims24
A non-contact running type elevator comprising:
- a guide rail which is laid in an up-and-down direction in an elevation path;
- a car which ascends and descends along the guide rail;
- a guide apparatus which is disposed on a part of the car, which is opposed to the guide rail, the guide apparatus levitating the car from the guide rail by an effect of magnetic force, and non-contactly running and guiding the car;
- and
- a control device which controls the guide apparatus in a manner to generate magnetic force with respect to at least two movement axes of the car, the control device executing control for only some of the movement axes at a time of start of guide, and then executing control for the other movement axes after passing of a predetermined time from the start of the guide.
2 more elements
A non-contact running type elevator comprising:
- a guide rail which is laid in an up-and-down direction in an elevation path;
- a car which ascends and descends along the guide rail;
- a guide apparatus which is disposed on a part of the car, which is opposed to the guide rail, the guide apparatus levitating the car from the guide rail by an effect of magnetic force, and non-contactly running and guiding the car;
- and
- a control device which controls the guide apparatus in a manner to generate magnetic force with respect to at least two movement axes of the car, the control device having control gains which are set for the respective movement axes, executing control, with respect to a specified one of the movement axes, with control gains for generating the magnetic force that is necessary for guiding from beginning of the guiding, executing control, with respect to the other movement axes, with control gains lower than the control gains for generating the magnetic force that is necessary for guiding from beginning of the guiding, and executing control with a predetermined control gain with respect to each of the movement axes after passing of a predetermined time from the beginning of the guiding.
2 more elements
A non-contact running type elevator comprising:
- a guide rail which is laid in an up-and-down direction in an elevation path;
- a car which ascends and descends along the guide rail;
- a guide apparatus which is disposed on a part of the car, which is opposed to the guide rail, the guide apparatus levitating the car from the guide rail by an effect of magnetic force, and non-contactly running and guiding the car;
- and
- a control device which controls the guide apparatus in a manner to generate magnetic force with respect to at least two movement axes of the car, the control device having control gains which are set for the respective movement axes, executing control with control gains for guiding in a normal state when guide positions relating to the respective movement axes are within a predetermined range, and executing control with control gains which are different from the control gains for guiding in the normal state with respect to some or all of the movement axes when the guide positions are out of the predetermined range.
2 more elements
A non-contact running type elevator comprising:
- a guide rail which is laid in an up-and-down direction in an elevation path;
- a car which ascends and descends along the guide rail;
- a guide apparatus which is disposed on a part of the car, which is opposed to the guide rail, the guide apparatus levitating the car from the guide rail by an effect of magnetic force, and non-contactly running and guiding the car;
- and
- a control device which controls the guide apparatus in a manner to generate magnetic force with respect to at least two movement axes of the car, the control device having at least two kinds of control gains which are set for the respective movement axes, and executing control by switching the control gains in accordance with a state of each of the movement axes.
2 more elements
Dependencies are inferred from the claim text.