CONTROL SYSTEM FOR AN ELEVATOR APPARATUS
First Claim
1. A control system for an elevator apparatus comprising a car or the like, which is movable between a lower level or floor and an upper level or floor, and driven by an a.c. reversible electrical machine with the energy provided by a source, and controlled through a first inverter;
- the system comprising energy storage means coupled to said first inverter and controlled through a second inverter, and adapted to store energy generated by said electrical machine and energy coming from the source and optionally not used by said machine, as well as to deliver the stored energy towards said machine when the latter requires a power higher than a threshold;
the system being characterized in that it is arranged to automatically cause a lifting of the car up to the upper floor when preset conditions occur in a time interval of inactivity of the elevator apparatus.
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Accused Products
Abstract
The control system comprises energy accumulators (20; 120) coupled to a first inverter (10) and controlled through a second inverter (12). Such accumulators (20; 120) are adapted to store the energy generated by the electrical machine (3) associated to the elevator apparatus (1), and the energy coming by a source and optionally not used by the machine (3), as well as to deliver the stored energy towards the machine (3) when this requires energy with a power higher than a threshold.
The system is arranged to automatically cause the lifting of the car (2) up to the highest floor when preset conditions occur in a time interval of inactivity of the elevator apparatus (1).
22 Citations
14 Claims
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1. A control system for an elevator apparatus comprising a car or the like, which is movable between a lower level or floor and an upper level or floor, and driven by an a.c. reversible electrical machine with the energy provided by a source, and controlled through a first inverter;
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the system comprising energy storage means coupled to said first inverter and controlled through a second inverter, and adapted to store energy generated by said electrical machine and energy coming from the source and optionally not used by said machine, as well as to deliver the stored energy towards said machine when the latter requires a power higher than a threshold; the system being characterized in that it is arranged to automatically cause a lifting of the car up to the upper floor when preset conditions occur in a time interval of inactivity of the elevator apparatus. - View Dependent Claims (2, 3, 4)
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5. A control system for an elevator apparatus comprising a car or the like, and which can be moved through an a.c. reversible electrical machine, supplied with the energy which is provided by a source with a predetermined maximum supply power, and controlled through a first inverter;
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the system including energy storage means which are coupled to said first inverter and are controlled through a second inverter, and are adapted to store energy generated by said electrical machine and/or coming from the source, as well as to deliver the stored energy towards said machine, and controlling and regulation means arranged to drive said inverter according to pre-established modes as a function of the power at the input of said first inverter; the system being characterized in that said controlling and regulation means are arranged to calculate the electric power operatively required or supplied by said electrical machine, and to drive said inverter so as to; allow the supply of energy from said source to the electrical machine, when the electric power required by said machine is lower than or equal to the maximum supply power of the source; deliver the energy drawn from the storage means to the electrical machine, with a power corresponding to the difference between the electric power required by said machine and the maximum supply power of the source, when the latter is lower than the electric power required by the machine; store the energy supplied by said electrical machine and that coming from said source in the storage means, until when a state variable indicative of the charge condition of said storage means is lower than a preset maximum value; and store only the energy supplied by the electrical machine in the storage means, when said state variable exceeds said preset maximum value. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification