Linear motor arrangement with center of mass balancing
US4831292A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 27, 1988 |
| Grant date | May 16, 1989 |
| Priority date | — |
| Expiry date | May 27, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K33/06
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A motor winding assembly of mass M.sub.m is disposed for reciprocating linear movement within a housing, while a motor armature assembly of mass M.sub.a is disposed for reciprocating linear movement within the motor winding assembly. A first spring having a spring constant K.sub.m is connected between the motor winding assembly and the housing, and a second spring having a spring constant K.sub.a is connected between the motor armature assembly and the housing. The spring constants K.sub.m and K.sub.a satisfy the relation K.sub.m /K.sub.a =M.sub.m /M.sub.a, and since the motor housing assembly and the motor armature assembly move by amounts inversely proportional to their respective masses, essentially no vibration is transmitted to the housing over a wide range of motor operating frequencies.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.