Title:
REACTION BALANCED ROTARY DRIVE MECHANISM
Document Type and Number:
WIPO Patent Application WO2003052287
Kind Code:
A3
Abstract:
A rotary drive mechanism is disclosed comprising a housing (10), a first motor (12) having a first rotor (38) and a first stator (32) connected to the housing and a second motor (50) having a second rotor (52) and a second stator (54) connected to the housing characterised in that the second motor is mechanically independent of the first motor whereby acceleration torques of the first motor are at least partially inertia balanced by the second motor. The balancing may be effected by equal and opposite rotation of the second motor. Control means may be provided to provide the second motor with a current which is proportional to that supplied to the first motor. Also disclosed is a positioning device and a probe having the rotary drive mechanism.
Inventors:
NAI KENNETH CHENG-HOE (GB)
WESTON NICHOLAS JOHN (GB)
MCFARLAND GEOFFREY (GB)
MCMURTRY DAVID ROBERTS (GB)
WESTON NICHOLAS JOHN (GB)
MCFARLAND GEOFFREY (GB)
MCMURTRY DAVID ROBERTS (GB)
Application Number:
PCT/GB2002/005691
Publication Date:
November 27, 2003
Filing Date:
December 16, 2002
Export Citation:
Assignee:
RENISHAW PLC (GB)
NAI KENNETH CHENG-HOE (GB)
WESTON NICHOLAS JOHN (GB)
MCFARLAND GEOFFREY (GB)
MCMURTRY DAVID ROBERTS (GB)
NAI KENNETH CHENG-HOE (GB)
WESTON NICHOLAS JOHN (GB)
MCFARLAND GEOFFREY (GB)
MCMURTRY DAVID ROBERTS (GB)
International Classes:
H02K16/00; H02K23/04; H02K7/02; H02K15/16; (IPC1-7): H02K16/00
Domestic Patent References:
| WO2001057473A1 | 2001-08-09 |
Foreign References:
| FR2772207A1 | 1999-06-11 | |||
| US5813823A | 1998-09-29 |
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