Rotation speed controlling system for shredder motor
US8008882B2 · kind B2 · utility
0Cited by
15References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 16, 2007 |
| Grant date | Aug 30, 2011 |
| Priority date | — |
| Expiry date | Apr 26, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P23/0004
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A system for controlling the rotation speed of a shredder motor is disclosed. It consists of a bridge rectifier circuit, a forward/reverse controlling switch, a motor speed switch, and AC motor coils. By changing a switch, it is possible to activate the following four modes: forward fast, reverse fast, forward slow, and reverse slow. A user can thus operate a shredder at high torque and low rotation speed or high rotation speed and low torque depending on the number of sheets to be shredded.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.