Linear motor

• US 6,528,907 B2
• Filed: 05/21/2001
• Issued: 03/04/2003
• Est. Priority Date: 04/07/2000
• Status: Expired due to Fees

• Current Assignee: Mirae Corporation
• Original Assignee: Mirae Corporation
• Inventors: Kim, Do Hyun, Hwang, Ji Hyun, Chun, Jang Sung
• Primary Examiner(s): Mullins, Burton S.
• Application Number:
  US09/860,530
• Publication Number:
  US 20010035686A1
• Time in Patent Office: 652 Days
• Field of Search: 310/54, 310/61, 310/12, 310/13, 310/14, 310/52, 310/64, 310/65, 310/16
• US Class Current: 310/12.29
• CPC Class Codes: F25B 21/02 using Peltier effect; using Nernst-Ettinghausen effect
• CPC Class Codes: F28D 15/02 in which the medium condenses and evaporates, e.g. heat pipes heat pipes used in solar heat collectors F24S10/95; in radiators F28D1/0226; in nuclear reactors G21C15/257
• CPC Class Codes: H02K 41/031 of the permanent magnet type
• CPC Class Codes: H02K 9/00 Arrangements for cooling or ventilating channels or ducts in parts of the magnetic circuit H02K1/20, H02K1/32; channels or ducts in or between conductors H02K3/22, H02K3/24
• CPC Class Codes: H10N 10/00 Thermoelectric devices comprising a junction of dissimilar materials, i.e. devices exhibiting Seebeck or Peltier effects integrated devices or assemblies of multiple devices H10N19/00

Abstract

A linear motor capable of effectively cooling heat generated when the linear motor is driven is provided where the motor includes a moving element having the lower portion with a plurality of field magnets. The motor includes a stator element having an upper portion with a my plurality or coil units arranged at a constant spacing, and heat dissipating members coupled to the stator element at constant spacing, for externally dissipating heat generated by the stator. An improved cooling effect can be achieved by the provision of heat pipes having heat dissipating fins formed thereon, or by use of thermoelectric semiconductor cooling modules.

Claims

1. A linear motor comprising:

a stator having a longitudinally extended back plate and a plurality of coil units disposed on said back plate in longitudinally spaced relationship;

a moving element spaced above said stator, said moving element including a plurality of field magnets disposed in longitudinally spaced relationship; and

,

a plurality of heat pipes coupled to said back plate in close proximity to said plurality of coil units for removing heat generated by said plurality of coil units, each of said plurality of heat pipes having a predetermined diameter (D_p) and a plurality of heat dissipating fins coupled thereto for increasing a heat dissipation area of said heat pipe, each of said heat dissipating fins having a diameter (D_f) defined by the equation;