METHOD AND DEVICE FOR HEATING STATOR
First Claim
1. A method for heating a stator formed such that a conducting coil is mounted on a stator core formed of laminated steel sheets, the method comprising:
- disposing a first induction coil near one of the coil end parts of the stator and a second induction coil near the other coil end part,energizing the first induction coil and the second induction coil to induction heat the stator as pre-heating prior to a resin-molding process or a varnish applying process of the coil end parts,wherein the method further includes;
moving the first induction coil in an axial direction of the stator with a first movement device; and
moving the second induction coil in the axis direction of the stator with a second coil movement device,moving the first induction coil with the first coil movement device,moving the second induction coil with the second movement device, andenergizing the first and second induction coils to induction heat the stator,measuring temperatures of the coil end part and the stator core of the stator with a temperature measuring device, andbased on a temperature difference between the coil end part and the stator core measured by the temperature measuring device,moving the first induction coil with the first coil movement device and the second induction coil with the second coil movement device.
1 Assignment
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Accused Products
Abstract
In a method of heating a stator, a first induction coil is disposed near one of the coil ends of the stator, and a second induction coil is disposed near the other, and the first induction coil and the second induction coil are electrically energized, whereby the induction-heating of the stator is performed as a pre-heating step prior to the resin molding step of the coil ends. According to this method, a first movement unit for moving the first induction coil and a second movement unit for moving the second induction coil are provided, the first induction coil is moved by the first movement unit and the second induction coil is moved by the second movement unit for induction-heating of the stator.
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Citations
6 Claims
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1. A method for heating a stator formed such that a conducting coil is mounted on a stator core formed of laminated steel sheets, the method comprising:
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disposing a first induction coil near one of the coil end parts of the stator and a second induction coil near the other coil end part, energizing the first induction coil and the second induction coil to induction heat the stator as pre-heating prior to a resin-molding process or a varnish applying process of the coil end parts, wherein the method further includes; moving the first induction coil in an axial direction of the stator with a first movement device; and moving the second induction coil in the axis direction of the stator with a second coil movement device, moving the first induction coil with the first coil movement device, moving the second induction coil with the second movement device, and energizing the first and second induction coils to induction heat the stator, measuring temperatures of the coil end part and the stator core of the stator with a temperature measuring device, and based on a temperature difference between the coil end part and the stator core measured by the temperature measuring device, moving the first induction coil with the first coil movement device and the second induction coil with the second coil movement device. - View Dependent Claims (2, 3)
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4. A method for heating a stator formed such that a conducting coil is mounted on a stator core formed of laminated steel sheets, the method comprising
disposing a first induction coil near one of the coil end parts of the stator and a second induction coil near the other coil end part, energizing the first induction coil and the second induction coil to induction heat the stator as pre-heating prior to a resin-molding process or a varnish applying process of the coil end parts, wherein the method further includes: -
moving the first induction coil in an axial direction of the stator with a first coil movement device; and moving the second induction coil in the axis direction of the stator with a second coil movement device, moving the first induction coil with the first coil movement device, moving the second induction coil with the second movement device, and energizing the first and second induction coils to induction heat the stator, wherein the method further includes a control device that controls the first coil movement device and the second coil movement device, and after a lapse of a predetermined time, the control device controls the first coil movement device to move the first induction coil and controls the second coil movement device to move the second induction coil, and data on temperature increase of the stator when heated by the first and second induction coils not yet moved are obtained in advance and the predetermined time is determined based on the data on temperature increase.
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5. A device for heating a stator formed such that a conducting coil is mounted on a stator core formed of laminated steel sheets, the device comprising:
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a first induction coil to be disposed near one of coil end parts of the stator and a second induction coil to be disposed near the other coil end part, the first induction coil and the second induction coil being arranged to be energized to induction heat the stator as pre-heating prior to a resin-molding process or a varnish applying process of the coil end parts, wherein the device further includes; a first coil movement device that moves the first induction coil in an axial direction of the stator; a second coil movement device that moves the second induction coil in the axis direction of the stator; and a control device that controls the first coil movement device and the second coil movement, the device for heating a stator includes temperature measuring device that measures temperatures of the coil end part and the stator core of the stator, and the control device is adapted to control, based on a temperature difference between the coil end part and the stator core measured by the temperature measuring device, the first coil movement device to move the first induction coil and the second coil movement device to move the second induction coil.
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6. (canceled)
Specification