Method for energy storage for load hoisting machinery
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United States of America Patent
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Aug 10, 1999
Issued Date -
N/A
app pub date -
Jul 31, 1998
filing date -
Nov 5, 1997
priority date (Note) -
Expired
status (Latency Note)
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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.
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