Electrical generator or motor structure – Dynamoelectric – Linear
Patent
1998-04-07
1999-10-05
Ramirez, Nestor
Electrical generator or motor structure
Dynamoelectric
Linear
H02K 4102, H02K 4135
Patent
active
059629371
ABSTRACT:
This X-Y table can move a load (CH) along perpendicular active directions (X, Y). It includes a base (1), a carriage (4) for the load (CH) mounted so as to move on the base along the active directions (X; Y), in particular via sliding means (3, 4) for each of said directions, two linear motors (B, C) which each include a stator (5) and a moving element (6) coupled to the carriage (4). Coils and magnets are respectively embedded in the moving elements and in the stators for applying driving forces to the carriage (4) along the active direction of the motor concerned (B, C), while allowing the moving element mobility in the other active direction with respect to said stator element.
According to the invention, the length of the permanent magnets of the stator (5) of each of the two motors is greater than the length of the coils of the corresponding moving element along the direction perpendicular to the active direction of the motor concerned in the X-Y displacement plane, the difference between these two lengths being substantially equal to or greater than the travel of the moving part of the X-Y table along said perpendicular direction.
REFERENCES:
patent: 4563602 (1986-01-01), Nagasaka
patent: 5114302 (1992-05-01), Meisser et al.
Patent Abstracts of Japan vol. 018, No. 366 (M-1636) , Jul.1994 & JP 06 099327 (Yaskawa Electric Corp) , Apr. 12, 1994.
Jones Judson H.
Ramirez Nestor
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