Modular linear electric motor with limited stator excitation zone and stator gap compensation
First Claim
1. A linear motor elevator system, comprising:
- at least one linear stator comprised of individually-energized stator sections, said linear stator including a gap;
at least one thrust plate oriented adjacent to said stator;
an elevator platform attached to said thrust plate; and
at least one compensation stator section located adjacent to said gap in said linear stator and in parallel with said linear stator, wherein said thrust plate is longer than said gap.
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Accused Products
Abstract
A linear motor system including compartmentalized stator sections provides an interchangeable and serviceable alternative to other linear motors. The stator sections may be individually-energized so that power is only sent to stator sections adjacent to the thrust plate or rotor of the linear motor. A sufficiently long thrust plate is used to cover any gaps in the linear stator, and additional compensation stator sections are used to provide additional motor force to the thrust plate adjacent to these gap sections. If utilized onboard a ship, additional compensation stator sections may be incorporated into the face of deck hatches. The linear motor system can also be used to counteract gravitational effects in a large hanging door system implementation.
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Citations
20 Claims
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1. A linear motor elevator system, comprising:
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at least one linear stator comprised of individually-energized stator sections, said linear stator including a gap; at least one thrust plate oriented adjacent to said stator; an elevator platform attached to said thrust plate; and at least one compensation stator section located adjacent to said gap in said linear stator and in parallel with said linear stator, wherein said thrust plate is longer than said gap. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A linear motor drive system for moving large doors, comprising:
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at least one linear stator comprised of individually-energized stator sections, said linear stator including a gap; at least one thrust plate adjacent to said stator, said stator and thrust plate oriented so that an attraction force between the stator and the thrust plate is vertically upward; a door panel attached on the bottom of said thrust plate; and at least one compensation stator section located adjacent to said gap in said linear stator and in parallel with said linear stator, wherein said thrust plate is longer than said gap. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification