Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Magnetic suspension device

A technology of magnetic levitation and levitation, applied in the direction of magnetic attraction or thrust holding device, electrical components, etc., can solve the problems of cost increase, device reliability decrease, excitation current increase, etc.

Inactive Publication Date: 2012-07-11
TOSHIBA ELEVATOR KK
View PDF5 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, if the control gain is changed in order to adjust the suspension state, 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
[0016] Also, if a zero signal is input to the current integrator to stop the zero power control, the

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Magnetic suspension device
  • Magnetic suspension device
  • Magnetic suspension device

Examples

Experimental program
Comparison scheme
Effect test

Example

[0126] (First embodiment)

[0127] (1) Overall composition

[0128] 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'.

[0129] 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.

[0130] In this magnetic levitation device 1', the excitation voltage calculation unit 115 is configured as follows.

[0131] That is, the excitation voltage calculation unit 115 includes a sensor unit 130, a subtractor 131, a zero power controller 133, an external force range detector 135, a memory 137, a subtractor 139, a gap length constant contro...

Example

[0199] (Second embodiment)

[0200] Next, the second embodiment will be described.

[0201] 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.

[0202] 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. 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 guide 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.

[0203] Such as Figur...

Example

[0314] (Third embodiment)

[0315] Next, the third embodiment will be described.

[0316] 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 16 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.

[0317] Figure 16 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.

[0318] The magnetic levitation device 300 has an auxiliary support part 302, a magnet unit 107, a guide member 304, an anti-vibration table 306, a linear guide 308, an excitation voltage calculation part 115, a power amplifier 313, a gap sensor 121, and a current sensor 123.

[0319] The c...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The present invention provides a magnetic suspension device which can simplify zero power controlled adjustment work and inhibit exciting current increases along with stopping of zero power control, costs can be reduced, and reliability can be enhanced. An external force scope detector (35) is used for detecting external forces on a suspension body (111), thus the input of a current integrator (159) of a zero power control loop (L2) is zero, and switching a switcher (167) in an interval-fixed control path (L3) to start interval length fixed control. Thus, the external force enabling the interval length to change is presumed by a state observer (149), and the zero power control is restarted when the external force presumption value is detected being limited within a prescribed scope.

Description

[0001] This invention is based on Japanese patent application 2010-274224 (filing date: 12 / 9 / 2010), and enjoys the priority thereof. This application incorporates this application by reference in its entirety. technical field [0002] Embodiments of the present invention relate to a magnetic levitation device that supports an object without contact and converges an excitation current of an electromagnet to zero. Background technique [0003] The attraction type magnetic levitation device supports the object without contact by the attraction force of the electromagnet to the iron guide rail. The maintenance of the non-contact state is generally performed by detecting the levitation gap length of the object (suspension) and the current of the electromagnet coil, and controlling the attractive force (excitation current) of the electromagnet coil. [0004] Accordingly, a method of constituting a magnet unit with a permanent magnet and an electromagnet has been developed. In th...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): H02N15/00
Inventor 森下明平伊东弘晃
Owner TOSHIBA ELEVATOR KK
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com