Method for energy storage for load hoisting machinery
AssigneePaceco Corp.
InventorMasamitsu Enoki
Life of this patent
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Abstract
A method for energy storage and recovery for load hoisting equipment driven by an inverter controlled first induction motor and having a second inverter controlling a second induction motor which drives a flywheel whereby, utilizing rest power such as reverse power from the first induction motor when lowering a load and unused power at small load or idle to accelerate rotation of a flywheel, whereby energy is stored, and the system is reversed when a load is lifted and power is consumed whereby the flywheel causes the second motor to generate power and deliver it to the first motor.
Claims3
A method for energy storage and recovery for load moving machinery powered by a first induction motor which is controlled by a first inverter, the steps comprising
- driving said first induction motor to act as a generator and create reverse power when lowering or braking a load, said reverse power combined with unused power when said load hoisting machinery is at small load or idle, said combined powers being defined as rest power,
- utilizing said rest power for driving a second induction motor,
- controlling said rest power by a second inverter,
- rotating a flywheel by said second induction motor to store said rest power, and
- rotating said second induction motor by said flywheel to supply power to said first induction motor when said first induction motor is consuming power in excess of its average power consumption.
Dependencies are inferred from the claim text.