Method for energy storage for DC motor powered load hoisting machinery
US7228942B2 · kind B2 · utility
7Cited by
5References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 6, 2004 |
| Grant date | Jun 12, 2007 |
| Priority date | — |
| Expiry date | May 18, 2025 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66B1/30
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A method for energy storage and recovery for load hoisting equipment driven by a diode controlled DC motor and having an inverter controlling an induction motor which drives a flywheel whereby, utilizing rest power such as reverse power from the DC 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 induction motor to generate power and deliver it to the DC motor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.