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Electrodynamic linear motor

Patent:

Abstract

When driving the carriage of a printer through a rotating motor, there are problems regarding the limited accuracy of the carriage position due to rotation or contraction and ageing of the cable. In order to solve the problem, a direct drive system was proposed, in which the printer carriage is driven by a linear motor. If one wants to keep the motor circuit of such a motor compact, then the magnetic flux density in the air gap must be reduced or the motor travel must be reduced. It is the purpose of this invention to create an electrodynamic linear motor, which on the one hand is compact and light and on the other hand has a relatively high constant force over a large travel. The invention is characterised by the fact that magnetic fields of alternating polarity are generated at equal intervals in the magnetic field, and that the coil arrangement has 2 adjacent coils, whose size corresponds to half the length of each magnetic pole. A logic circuit is provided to select one of the two coils and to determine the direction of the current depending on the signals of a magnetic field sensor on the coil arrangement.
Authors:
Publication Date:
May 29, 1980
Product Type:
Patent
Report Number:
DE 2946147; A
Reference Number:
EDB-83-111771
Subject:
33 ADVANCED PROPULSION SYSTEMS; ELECTRIC MOTORS; DESIGN; MAGNETIC FIELDS; MICROPROCESSORS; COMPUTERS; ELECTRONIC CIRCUITS; MICROELECTRONIC CIRCUITS; MOTORS; 330300* - Advanced Propulsion Systems- Electric-Powered Systems
OSTI ID:
6270551
Country of Origin:
Germany
Language:
German
Availability:
Deutsches Patentamt, Muenchen, Germany, F.R.
Submitting Site:
HEDB
Size:
Pages: 24
Announcement Date:
Mar 01, 1983

Patent:

Citation Formats

Munehiro, H. Electrodynamic linear motor. Germany: N. p., 1980. Web.
Munehiro, H. Electrodynamic linear motor. Germany.
Munehiro, H. 1980. "Electrodynamic linear motor." Germany.
@misc{etde_6270551,
title = {Electrodynamic linear motor}
author = {Munehiro, H}
abstractNote = {When driving the carriage of a printer through a rotating motor, there are problems regarding the limited accuracy of the carriage position due to rotation or contraction and ageing of the cable. In order to solve the problem, a direct drive system was proposed, in which the printer carriage is driven by a linear motor. If one wants to keep the motor circuit of such a motor compact, then the magnetic flux density in the air gap must be reduced or the motor travel must be reduced. It is the purpose of this invention to create an electrodynamic linear motor, which on the one hand is compact and light and on the other hand has a relatively high constant force over a large travel. The invention is characterised by the fact that magnetic fields of alternating polarity are generated at equal intervals in the magnetic field, and that the coil arrangement has 2 adjacent coils, whose size corresponds to half the length of each magnetic pole. A logic circuit is provided to select one of the two coils and to determine the direction of the current depending on the signals of a magnetic field sensor on the coil arrangement.}
place = {Germany}
year = {1980}
month = {May}
}