Patent
Elevator control device
TLDR
In this paper, the first and second power converters supplying electrical power to a multi-winding motor comprising a wind-up mechanism are switched off, and a third contactor comprising a short-circuiting unit is switched on.Abstract:
When there is a breakdown in either one of first and second power converters supplying electrical power to a multi-winding motor comprising a wind-up mechanism, a rescue operation can be safely and reliably carried out by using the remaining power converter. A wind-up mechanism comprises a two-winding motor having first and second windings, and, during normal operation, power is supplied to the first and second windings from first and second inverters respectively. When the first inverter has broken down due to excessive current, first and second contactors are switched off, and a third contactor comprising a short-circuiting unit is switched on. Consequently, both windings receive power from the second inverter, enabling the rescue operation to be carried out without causing vibrations.read more
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Patent
Motor driving apparatus
Shunsuke Matsubara,Yasusuke Iwashita,Yuuichi Yamada,Shigeki Hanyu,Shirouzu Masatomo,Koujirou Sakai +5 more
TL;DR: In this paper, a motor driving apparatus capable of drivingly controlling a plurality of inverter units (IV1-IV4) with a single motor driving command S from a motor control unit (1), to thereby control a large-capacity motor or the like.
Patent
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TL;DR: In this article, a system for group controlling a plurality of elevators in accordance with group control algorithm including plurality of parameters is presented. This system includes a means for searching an optimum set.
Patent
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Elevator group control apparatus
TL;DR: In this paper, an elevator group control apparatus includes a parameter calculating unit for determining a weighting factor for an item to be evaluated, which is calculated from a running distance estimated by an estimation arithmetic operation unit by taking into consideration a relation between the running distance of an elevator and a passenger average waiting time.
Patent
Management of power from multiple sources based on elevator usage patterns
TL;DR: In this paper, power distribution is managed in an elevator system including an elevator hoist motor, a primary power supply, and an energy storage system, based on a predicted usage pattern for the motor.
References
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Patent
Control apparatus for elevator
TL;DR: In this paper, a control apparatus for an elevator comprising a temperature sensor which senses the temperature of the rotor of an induction motor during the stoppage of a cage, and a voltage/frequency control device which calculates the secondary winding resistance value of the induction motor on the basis of the output value of temperature sensor and which vector-controls a power conversion device by the use of the calculated secondary wound resistance value, is presented.
Patent
AC Elevator control system
TL;DR: In this paper, an AC elevator control system has a converter for converting a three-phase AC power to a direct current, an inverter for inverting the direct current to a three phase AC power with a variable voltage at a variable frequency, and a threephase induction motor for receiving the last-mentioned AC power.
Patent
Device for driving elevator at service interruption
TL;DR: In this article, a device for driving an elevator at the time of a service interruption according to the present invention has a circuit for varying d-axis magnetic flux command to prevent regeneative power that can damage the elements in an inverter from being generated at time of an interruption eliminating the need for a regenerative power consumption circuit.
Patent
Controller for alternating current elevator
TL;DR: In this article, an apparatus for controlling an AC powered elevator by rectifying a commercial AC power source into a direct current through a rectifier, converting the direct current into a variable frequency AC power through a main inverter, driving the AC motor by the thus converted AC power to operate the cage of the elevator, and sending the regenerated electric power back to the commercial power source via a regeneration inverter connected to the DC side of the main inverters when regeneration braking is applied to the electric motor.