Linear motor
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsShinichiro Kawano, Yukio Honda, Hiroshi Murakami
Life of this patent
Estimating the term…
Abstract
A linear motor includes tubular outer yoke (4), tubular inner yoke (3) disposed in outer yoke (4), coil (2) provided to inner yoke (3), permanent magnet (5a, 5b) vibrating following a magnetic flux produced by coil (2), and vibrator (6) made of magnetic material and supporting permanent magnets (5a, 5b). Magnetic loop produced by outer yoke (4) and inner yoke (3) travels through vibrator (6) free from interference by vibrator (6) because vibrator (6) is made of magnetic material. As a result, the linear motor vibrates efficiently.
Claims25
A linear motor comprising:
- (a) a tubular outer yoke;
- (b) a tubular inner yoke disposed in said outer yoke;
- (c) a coil provided to one of said outer yoke and said inner yoke;
- (d) a ring shaped permanent magnet located between said outer yoke and said inner yoke, and vibrating in response to a magnetic flux produced by said coil;
- and
- (e) a tubular vibrator made of magnetic material supporting said permanent magnet,
- wherein said vibrator is located between said outer yoke and said inner yoke.
A compressor including a linear motor, said motor comprising:
- (a) a tubular outer yoke;
- (b) a tubular inner yoke disposed in said outer yoke;
- (c) a coil provided to one of said outer yoke and said inner yoke;
- (d) a ring shaped permanent magnet located between said outer yoke and said inner yoke, and vibrating in response to a magnetic flux produced by said coil;
- and
- (e) a tubular vibrator made of magnetic material supporting said permanent magnet,
- wherein said vibrator is located between said outer yoke and said inner yoke.
A compressor including a linear motor, said motor comprising:
- (a) a tubular outer yoke;
- (b) a tubular inner yoke disposed in said outer yoke;
- (c) a coil provided to one of said outer yoke and said inner yoke;
- (d) a ring shaped permanent magnet located between said outer yoke and said inner yoke, and vibrating in response to a magnetic flux produced by said coil;
- and
- (e) a tubular vibrator made of magnetic material supporting said permanent magnet,
- wherein said permanent magnet is fixed to said vibrator on a side of one of said outer yoke and said inner yoke that includes said coil.
A compressor including a linear motor, said motor comprising:
- (a) a tubular outer yoke;
- (b) a tubular inner yoke disposed in said outer yoke;
- (c) a coil provided to one of said outer yoke and said inner yoke;
- (d) a ring shaped permanent magnet located between said outer yoke and said inner yoke, and vibrating in response to a magnetic flux produced by said coil;
- and
- (e) a tubular vibrator made of magnetic material supporting said permanent magnet,
- wherein at least one of said outer yoke and said inner yoke is a compression-formed body made of metal magnetic particles.
Dependencies are inferred from the claim text.