Abstract:
A cooling structure for a first electromagnetic coil includes the first electromagnetic coil having a space extending in the direction of a predetermined axis Z; a cooling member attached to an end surface, with respect to the direction of the predetermined axis Z, of the first electromagnetic coil and having a flow path for fluid internally formed; and an inlet pipe and an outlet pipe connected, within the space, to an inlet and outlet, respectively, of the flow path of the cooling member and extending through the space to a region outside the electromagnetic coil.
Abstract:
According to one aspect, a stage apparatus includes a first surface, a second surface, an overall magnet array, and a plurality of coils. The overall magnet array is mounted on the first surface, and includes an X magnet array and a Y magnet array. The coils are mounted on the second surface, and include a first coil that cooperates with the X magnet array to control force on the first surface along an x-axis. The coils also include a second coil that cooperates with the Y magnet array to control force on the first surface along a y-axis. The second coil cooperates with the overall magnet array to control force applied to the first surface in a direction normal to the first surface. The first coil does not cooperate with the overall magnet array to control the force applied in the direction normal to the first surface.
Abstract:
Coil arrays are disclosed for a planar or linear motor. An exemplary coil array includes multiple coil modules. Each coil module includes at least one coil set, respective electrical circuitry to and from the coil set, at least one respective hydraulic cooling device for the coil set, and respective hydraulic conduitry to and from the cooling device. The coil modules are interchangeably mountable relative to each other in the array such that mounting the coil module to the array produces accompanying hydraulic and electrical connections between the array and coil module, and removing the coil module from the array severs the connections.
Abstract:
A linear motor with high heat recovery efficiency that inhibits the rise in surface temperature is offered. The linear motor is disposed in a surrounding member (142) and facing a flow passage (142a) of a liquid for regulating temperature, and is provided with a coil unit (141) having at least a part thereof in contact with the liquid. The coil unit (141) is provided with a coil body (144), a mold layer (143) that covers the coil body and holds it in specific form, and a liquid protection layer (150) that covers the mold layer (143) and has liquid protection properties.
Abstract:
According to one aspect, an apparatus includes a stage, a motor to move the stage, an amplifier, and a controller. The motor has at least a first coil and a second coil, and the amplifier is configured to selectively provide current to either the first coil or the second coil. The controller is configured to control force generated by the motor. When moving the stage, the controller controls the motor force by using the amplifier to provide current to the first coil, smoothly reducing a force generated by the first coil before the stage moves to a predetermined switching location so that the coil is generating substantially no force at the switching location, switching the amplifier so that the amplifier provides current to the second coil, and smoothly increasing a force generated by the second coil after the stage moves past the predetermined switching location.