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US 10,294,070 B2Granted
Regenerative electrical power supply for elevators
AssigneePremco, Inc.
InventorsHarold L. Jacobs, Lewis M. Kwit, Kevin P. Lynch
Life of this patent
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Abstract
An energy storage system is provided including: an elevator; an elevator motor; a power system coupled to the elevator motor. The power system including at least one capacitor operable to store energy received form the elevator motor and to supply stored energy to the elevator motor; and at least one flywheel operable to store energy received from the elevator motor and to supply stored energy to the elevator motor.
Claims14
An energy storage system including:
- an elevator;
- an elevator motor;
- a power system coupled to the elevator motor;
- and
- the power system including:
- at least one capacitor operable to store energy received from the elevator motor and to supply stored energy to the elevator motor;
- at least one flywheel operable to store energy received from the elevator motor and to supply stored energy to the elevator motor, the at least one flywheel electrically coupled to a DC bus, the DC bus operable to receive a voltage generated by the elevator motor;
- and
- a flywheel motor controller that monitors the DC bus voltage and an AC line voltage.
6 more elements
A method of operating an elevator including:
- providing a power system coupled to an elevator motor operable to move an elevator having an elevator car and elevator doors;
- the power system including at least one capacitor and at least one flywheel;
- operating the at least one capacitor and the flywheel to store energy received from the elevator motor and to supply stored energy to the elevator motor;
- and
- monitoring voltage on a DC bus, wherein a flywheel motor controller monitors the DC bus voltage and an AC line voltage.
2 more elements
Dependencies are inferred from the claim text.