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Magnetic suspension device

A technology of magnetic levitation and levitation, which is applied in the direction of holding devices and electrical components using magnetic attraction or thrust, and can solve the problems of increasing the length of the suspension gap, increasing the heat generation, and increasing the cost.

Inactive Publication Date: 2011-06-15
TOSHIBA ELEVATOR KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, if the control gain for adjusting the suspension state is changed, the upper and lower limit values ​​of the limiter must be reset, and such adjustment work takes a lot of time
And the increase of adjustment time means the increase of cost
[0015] Also, if a zero signal is input to the current integrator to stop the zero power control, the levitation gap length increases with the increase of the external force, resulting in an increase of the excitation current
The increase of the excitation current leads to the increase of power consumption, the increase of the capacity of the electrical system and the increase of heat generation, which leads to the decrease of the reliability of the device

Method used

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Experimental program
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Effect test

no. 1 approach

[0123] (1) Overall structure

[0124] figure 2 It is a schematic diagram showing the structure of the magnetic levitation device according to the first embodiment, and its overall structure is indicated by 1'.

[0125] The magnetic levitation device 1'has the same structure as the above-mentioned magnetic levitation device 1, and includes a levitation body 111, a guide member 113, a driver 116, a gap sensor 121, a current sensor 123 and an excitation voltage calculation unit 115. Here, the excitation current i detected by the current sensor 123 z Current deviation Δi when the target value is zero z the same.

[0126] In this magnetic levitation device 1', the excitation voltage calculation unit 115 is configured as follows.

[0127] That is, the excitation voltage calculation unit 115 includes a sensor unit 130, a subtractor 131, a zero power controller 133, a gap length range detector 135, a memory 137, a subtractor 139, a gap length fixed controller 141, a gain multiplier 143, and ...

no. 2 approach

[0205] Next, the second embodiment will be described.

[0206] In the second embodiment, the excitation voltage and excitation current are calculated for each mode of the motion coordinate system of the suspension. Here, a case where the magnetic levitation device of the present invention is applied to an elevator will be described as an example.

[0207] Figure 5 It is a schematic diagram showing the structure of the magnetic levitation device according to the second embodiment. The entire structure when the magnetic levitation device is applied to an elevator is denoted by reference numeral 10.

[0208] also, Image 6 Is a perspective view showing the structure of the frame portion of the magnetic levitation device, Figure 7 It is a perspective view showing the surrounding structure of the magnet unit of the magnetic levitation device, Figure 8 It is a plan view showing the structure of the magnet unit of the magnetic levitation device.

[0209] Such as Figure 5 As shown, the in...

no. 3 approach

[0332] Next, the third embodiment will be described.

[0333] In the 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, such as Figure 15 As shown, the magnet unit can also be arranged on the ground side. In addition, in order to simplify the description, in the following, the parts common to the first and second embodiments are described with the same reference numerals.

[0334] Figure 15 It is a schematic diagram showing the structure of the magnetic levitation device according to the third embodiment, and its overall structure is indicated by the symbol 300.

[0335] The magnetic levitation device 300 has an auxiliary support portion 302, a magnet unit 107, a guide member 304, an anti-vibration table 306, a linear guide member 308, an excitation voltage calculation unit 115, a power amplifier 313, a gap sensor 121, and a current sensor 123.

[0336] The auxiliary support ...

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Abstract

The invention provides a magnetic suspension device, which disposes a switching device (157) in a zero power control circuit (L2), contact of relative guiding components (113) are detected in advance via a gap length range detector (135) and input of a current integrator (159) is made to be zero, and gap length deviation then is stored in a storage (137). Then, a gap length deviation integrator (169) is actuated via a switching device (167), a gap length fixed control is started based on output of the storage (137). Then, an external force is presumed via a state observer (149), and the storage (137) is reset when the presumptive value is in a prescribed range.

Description

Technical field [0001] The embodiment of the present invention relates to a normally-conductance attraction type magnetic levitation device, and more particularly, to a magnetic levitation device that converges the excitation current of an electromagnet to zero and supports an object in a non-contact manner. Background technique [0002] The attraction magnetic levitation device uses the attraction of the electromagnet to support the target in a non-contact manner relative to the iron rail. The non-contact state is generally maintained by detecting the length of the levitation gap of the target (suspension), the current of the solenoid coil, and controlling the attractive force (excitation current) of the solenoid coil. [0003] Correspondingly, a method of forming a magnet unit with a permanent magnet and an electromagnet has been developed. In this method, the so-called “zero power control” that maintains the stability of the floating state and makes the excitation current of th...

Claims

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Application Information

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IPC IPC(8): H02N15/00
Inventor 森下明平
Owner TOSHIBA ELEVATOR KK
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