Control system and energy storage for an elevator apparatus
First Claim
1. A control system for an elevator apparatus comprising a single car without counterweight, 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 arranged to automatically cause, during normal operation of the elevator apparatus, a lifting of the car up to the upper floor when preset conditions occur in a time interval of inactivity of the elevator apparatus.
1 Assignment
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Accused Products
Abstract
A control system is provided and includes energy accumulators (20; 120) coupled to a first inverter (10) and controlled through a second inverter (12). These accumulators (20; 120) are adapted to store the energy generated by an electrical machine (3) associated with 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).
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Citations
11 Claims
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1. A control system for an elevator apparatus comprising a single car without counterweight, 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 arranged to automatically cause, during normal operation of the elevator apparatus, 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, 5, 6, 7, 8, 9, 10, 11)
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Specification