Transport device and transport method

Patent metadata

Field	Value
Publication number	US-2022238267-A1
Application number	US-202017614577-A
Country	US
Kind code	A1
Filing date	Apr 7, 2020
Priority date	Jun 18, 2019
Publication date	Jul 28, 2022
Grant date	—

Abstract

A transport device and a transport method efficiently increase a thrust to suppress power consumption. The transport device has a first magnetic body on a side of a to-be-transported object, a magnetic circuit with a core consisting of a second magnetic body, and a winding wound around an outside of the core, and a drive circuit supplying a current to the winding of the magnetic circuit. The magnetic circuit has first and second magnetic circuits, and in a case where the first magnetic body is located on a side of the second magnetic circuit relative to a first predetermined position between the first magnetic circuit and the second magnetic circuit, the drive circuit supplies a current to a winding of the first magnetic circuit in such a manner to cause an electromagnetic repulsive force to be generated between the first magnetic body and the first magnetic circuit.

First claim

1 .- 7 . (canceled)

8 . A transport device comprising:
a first magnetic body provided on a side of a to-be-transported object; a magnetic circuit comprising a core consisting of a second magnetic body, and a winding around an outside of the core; and a drive circuit supplying a current to the winding of the magnetic circuit; the magnetic circuit comprising a first magnetic circuit, and a second magnetic circuit adjacent the first magnetic circuit and located on a side to which the to-be-transported object is transported, wherein in a case where it is assumed that a predetermined current with the same absolute value is applied to the first magnetic circuit and the second magnetic circuit, when the first magnetic body is located between from the first magnetic circuit to a first predetermined position, an absolute value of an electromagnetic attraction force to the first magnetic body which is produced by the second magnetic circuit becomes larger than an absolute value of an electromagnetic repulsive force with respect to the first magnetic body which is produced by the first magnetic circuit, when the first magnetic body is located at the first predetermined position, an absolute value of an electromagnetic attraction force to the first magnetic body which is produced by the second magnetic circuit becomes equal to an absolute value of an electromagnetic repulsive force with respect to the first magnetic body which is produced by the first magnetic circuit, and when the first magnetic body is located between from the first predetermined position to the second magnetic circuit, an absolute value of an electromagnetic attraction force to the first magnetic body which is produced by the second magnetic circuit becomes smaller than an absolute value of an electromagnetic repulsive force with respect to the first magnetic body which is produced by the first magnetic circuit, and wherein in a case where the first magnetic body is located on a side of the first magnetic circuit relative to the first predetermined position, the drive circuit mainly supplies a current to a winding of the second magnetic circuit in such a manner that an electromagnetic attraction force which is produced between the first magnetic body and the second magnetic circuit becomes a main thrust, in a case where the first magnetic body is located on a side of the second magnetic circuit relative to the first predetermined position, the drive circuit mainly supplies a current to a winding of the first magnetic circuit in such a manner that an electromagnetic repulsive force which is produced between the first magnetic body and the first magnetic circuit becomes a main thrust, and at the time of starting the first magnetic body, the drive circuit supplies a current to the winding of the second magnetic circuit in such a manner that an electromagnetic attraction force is first applied between the first magnetic body and the second magnetic circuit.

9 . The transport device according to claim 8 , wherein
in a case where the first magnetic body is located on a side of the first magnetic circuit relative to the first predetermined position, the drive circuit supplies a current to a winding of the second magnetic circuit in such a manner to cause an electromagnetic attraction force to be generated between the first magnetic body and the second magnetic circuit.

10 . A transport device comprising:
a first magnetic body provided on a side of a to-be-transported object; a magnetic circuit comprising a core consisting of a second magnetic body, and a winding around an outside of the core; and a drive circuit supplying a current to the winding of the magnetic circuit; the magnetic circuit comprising a first magnetic circuit, and a second magnetic circuit adjacent the first magnetic circuit and located on a side to which the to-be-transported object is transported, wherein in a case where it is assumed that a predetermined current with the same absolute value is applied to the first magnetic circuit and the second magnetic circuit, when the first magnetic body is located between from the first magnetic circuit to a first predetermined position, an absolute value of an electromagnetic attraction force to the first magnetic body which is produced by the second magnetic circuit becomes larger than an absolute value of an electromagnetic repulsive force with respect to the first magnetic body which is produced by the first magnetic circuit, when the first magnetic body is located at the first predetermined position, an absolute value of an electromagnetic attraction force to the first magnetic body which is produced by the second magnetic circuit becomes equal to an absolute value of an electromagnetic repulsive force with respect to the first magnetic body which is produced by the first magnetic circuit, when the first magnetic body is located between from the first predetermined position to a second predetermined position, an absolute value of an electromagnetic attraction force to the first magnetic body which is produced by the second magnetic circuit becomes smaller than an absolute value of an electromagnetic repulsive force with respect to the first magnetic body which is produced by the first magnetic circuit, when the first magnetic body is located at the second predetermined position, an absolute value of an electromagnetic attraction force to the first magnetic body which is produced by the second magnetic circuit becomes equal to an absolute value of an electromagnetic repulsive force with respect to the first magnetic body which is produced by the first magnetic circuit, and when the first magnetic body is located between from the second predetermined position to the second magnetic circuit, an absolute value of an electromagnetic attraction force to the first magnetic body which is produced by the second magnetic circuit becomes larger than an absolute value of an electromagnetic repulsive force with respect to the first magnetic body which is produced by the first magnetic circuit, and wherein in a case where the first magnetic body is located on a side of the first magnetic circuit relative to the first predetermined position, the drive circuit mainly supplies a current to a winding of the second magnetic circuit in such a manner that an electromagnetic attraction which is produced between the first magnetic body and the second magnetic circuit becomes a main thrust, in a case where the first magnetic body is located between the first predetermined position and the second predetermined position, the drive circuit supplies a current to a winding of the first magnetic circuit in such a manner that an electromagnetic repulsive force that is produced between the first magnetic body and the first magnetic circuit becomes a main thrust, in a case where the first magnetic body is located on a side of the second magnetic circuit relative to the second predetermined position, the drive circuit mainly supplies a current to the winding of the second magnetic circuit in such a manner that an electromagnetic attraction force which is produced between the first magnetic body and the second magnetic circuit becomes a main thrust, and at the time of starting the first magnetic body, the drive circuit supplies a current to the winding of the second magnetic circuit in such a manner that an electromagnetic attraction force is first applied between the first magnetic body and the second magnetic circuit.

11 . A specimen analysis system equipped with the transport device according to claim 8 , wherein the to-be-transported object is a holder or rack holding a specimen container.

12 . A transport method by a transport device, comprising:
a to-be-transported body having a magnetic body; a magnetic circuit having a winding; and a

Assignees

• Hitachi High Tech Corp

Inventors

• Hoshi Ryosuke
• Aoyama Yasuaki
• Kaneko Satoru
• Kobayashi Hiroyuki
• Tamakoshi Takeshi
• Kambara Katsuhiro
• Watanabe Hiroshi
• Onizawa Kuniaki

Classifications

• B65G54/02 Primary

  electrostatic, electric, or magnetic · CPC title

• H02P25/064

  of the synchronous type · CPC title

• H01F7/206 Primary

  Electromagnets for lifting, handling or transporting of magnetic pieces or material (electromagnets for guidance of vehicles, workpieces B65G21/2009; for magnetic suspension or levitation H02N15/00) · CPC title

• H01F7/064

  Circuit arrangements for actuating electromagnets (circuit arrangements for obtaining special operating characteristics H01F7/18; driving circuits for electromagnets making use of a switching regulator H01H47/325) · CPC title

• H01F27/28

  Coils; Windings; Conductive connections · CPC title