The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 28, 1995
Filed:
Jun. 22, 1993
Masamoto Mizuno, Inazawa, JP;
Toshiaki Ishii, Inazawa, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A controller for a ropeless elevator, includes: a cross induction line cable arranged along the hoistway; an exciter provided on the car side to generate sinusoidal waves for positional detection in the cable; a movement amount detector provided on the car side to detect a car movement amount; a data calculator provided on the car side to calculate data on car speed and on secondary-conductor magnetic pole phase from the movement amount detected by the movement amount detector; a data transmitter provided on the car side to utilize the cross induction line cable in transmitting the data calculated by the data calculator to the building side; an induction radio circuit provided on the building side to utilize the cable in receiving data from the data transmission device and calculate the initial phase of the secondary conductor from the sinusoidal waves generated in the cross induction line cable; and an inverter control circuit provided on the building side to interpolate the initial phase calculated by the induction radio circuit on the basis of the magnetic pole phase received by the induction radio circuit and control the inverter on the basis of the calculated car position and the car speed data received by the induction radio circuit.