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Magnetic suspension device

A technology of magnetic levitation and suspension, which is applied to the holding device, transportation and packaging, vehicle parts, etc. with magnetic attraction or thrust, which can solve the problems of increased cost, large-scale and complicated device, and reduced accuracy of coil resistance, and achieves reliability improvement. Effect

Inactive Publication Date: 2009-03-18
TOSHIBA ELEVATOR KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, there is a problem that the device becomes larger and more complicated, leading to an increase in cost, etc.
[0021] In addition, in order to avoid such problems, even if the gap length information is fed back without using a gap sensor, since the stability of the suspension system depends on the coil resistance value and bias voltage, if the suspension body swings greatly, it will be caused by the accompanying The accuracy of coil resistance estimation decreases due to fluctuations in coil current and excitation voltage, and stable control cannot be performed.

Method used

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no. 1 Embodiment approach

[0137] FIG. 1 is a diagram showing a configuration of a magnetic levitation device according to a first embodiment of the present invention, and the overall configuration is denoted by 1'. In this magnetic levitation device 1', the gap sensor 121 is omitted. Instead, a contact detection unit 130 is provided on the suspension 111 and the vicinity of the suspension 111 . The contact detection unit 130 detects that the suspension 111 changes from the non-contact state to the contact state by using, for example, the piezoelectric rubber 129 .

[0138] In addition, the attractive force control unit 115 includes a posture (posture) estimation unit 133 , a posture calculation unit 135 , an estimation initialization unit 137 , and an initial value setting unit 139 in addition to the contact detection unit 130 described above. The posture estimation unit 133 is based on the excitation current Δi z The mechanism for estimating the levitation gap length deviation Δz and its velocity d(...

no. 2 Embodiment approach

[0322] Next, a second embodiment of the present invention will be described.

[0323] The second embodiment is characterized in that the excitation voltage and the excitation current are calculated for each mode of the motion coordinate system of the floating body. Here, the case where the magnetic levitation device of the present invention is applied to an elevator is taken as an example for description.

[0324] Figure 6 It is a figure which shows the structure of the magnetic levitation apparatus concerning 2nd Embodiment of this invention, and the whole structure at the time of applying this magnetic levitation apparatus to an elevator is shown by the code|symbol 10. also, Figure 7 is a perspective view showing the structure of the frame portion of the magnetic levitation device, Figure 8 It is a perspective view showing the structure around the magnet unit of the magnetic levitation device, Figure 9 It is an elevation view which shows the structure of the magnet un...

no. 3 Embodiment approach

[0411] Next, a third embodiment of the present invention will be described.

[0412] In the above-mentioned first and second embodiments, the magnet unit is installed on the side of the suspension, but this does not limit the installation position of the magnet unit at all. As shown in FIG. 13, the magnet unit may be arranged on the ground side. In addition, in order to simplify description, the same code|symbol will be used for the part common to 1st and 2nd embodiment below.

[0413] FIG. 13 is a diagram showing the configuration of a magnetic levitation device according to a third embodiment of the present invention, and the overall configuration is denoted by reference numeral 300 .

[0414] The magnetic levitation device 300 includes an auxiliary support part 302 , a magnet unit 107 , a guide part 304 , an anti-vibration table table 306 , a linear guide part 308 , a suction force control part 115 , a power amplifier 313 , and a current sensor 123 .

[0415] The auxiliary...

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Abstract

Provided is a mag-lev device capable of always performing stable levitation control by considering the affect given to a coil resistance estimated value by a displacement of a levitated body. A resistance measuring unit (140) calculates a resistance value of coils (119, 119') according to a current value iz flowing in the coils (119, 119') of a magnetic unit (107) detected by a sensor unit (123), an output of a excitation voltage calculation unit (125) calculating an excitation voltage value for stabilizing a magnetic circuit formed by the magnetic unit according to the coil current value obtained by the sensor unit (123), and a displacement speed estimated by a posture estimation unit (133) as a speed detection unit for detecting fluctuation speed of a space of the magnetic unit (107) opposing to a guide (113). According to the calculation result, the posture estimation unit (133) and the excitation voltage calculation unit 125 performs levitation control. Thus, even if the levitated body (111) is displaced, the coil resistance estimated value will not fluctuate and it is possible to always perform a stable levitation control according to the value.

Description

technical field [0001] The invention relates to a magnetic levitation device which supports a levitation body without contact through a constant conductance attracting maglev levitation. Background technique [0002] The constant electric attraction magnetic levitation device has no noise and dust, and has been realized in the ultra-high-speed surface conveyor (hereinafter referred to as HSST-High Speed ​​Surface Transport-), the magnetic levitation high-speed railway TransRapid, etc., and the clean room transportation system in the semiconductor factory. practical. In addition, application of the magnetic levitation device to a car guide device of an elevator (refer to Patent Document 1) and to a door has also been attempted. [0003] In such a magnetic levitation device, the electromagnet is opposed to the ferromagnetic component, and the levitation body is suspended by the attractive force generated between the electromagnet and the ferromagnetic component by excitation....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02N15/00B60L13/04B60L13/06B66B1/06
CPCB66B7/04B60L13/06B60L2200/26H02N15/00
Inventor 森下明平
Owner TOSHIBA ELEVATOR KK
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