Unlock instant, AI-driven research and patent intelligence for your innovation.

Switching circuit controlling multiple heating elements

A technology of switching circuits and heating elements, applied in the direction of circuits, electrical components, ohmic resistance heating, etc., can solve the problems of increasing, difficult to realize, and complexity in the manufacture of low-temperature cooling systems

Inactive Publication Date: 2012-04-18
SIEMENS FRIMLEY
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It may be difficult to achieve a sufficiently airtight seal around each wire to prevent leakage of cryogen or ingress of contaminated gases
The installation of the conductor itself represents an added complexity in the fabrication of the cryogenic cooling system

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
  • Switching circuit controlling multiple heating elements
  • Switching circuit controlling multiple heating elements
  • Switching circuit controlling multiple heating elements

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0010] In accordance with the present invention, a common pair of conductors 34 is used to control multiple heaters in a cryogenic system. figure 2 One embodiment of the present invention is shown. As shown, each resistive heater 12 is connected in series with an inductor 30 and a capacitor 32 , and the series combination is connected between two common conductors 34 . Each series combination of resistive heater 12 , inductor 30 and capacitor 32 forms a tuned circuit 36 ​​. The values ​​of inductor 30 and / or capacitor 32 are different in each respective tuned circuit 36 ​​.

[0011] exist figure 2 In the embodiment of the invention shown in , each tuned circuit is a tuned LCR circuit. The control system 20 controls a frequency generator 38 which provides a signal to an amplifier 40 . Amplifier 40 amplifies the signal provided to it by frequency generator 38 and applies the amplified signal across each tuned series LCR circuit.

[0012] Each tuned series LCR circuit reso...

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

A switching circuit comprising a plurality of heating elements (12), each connected as part of a tuned circuit (36), the tuned circuits being respectively tuned to different frequencies and connected in parallel between two common conductors (34), the circuit further comprising means (20, 38, 40) for applying an oscillating signal voltage between the two common conductors, at one or more frequencies each corresponding to a tuned frequency of one of the tuned circuits.

Description

technical field [0001] The present invention relates to switching circuits for controlling a plurality of heating elements. The invention relates in particular to use in cryostats for housing superconducting electromagnetic coils, such as are used, for example, in nuclear magnetic resonance (NMR) or magnetic resonance imaging (MRI) systems, particle accelerators, energy accumulators, X-ray sources and semiconductor etching the switching circuit. Background technique [0002] Such cryogenically cooled superconducting systems typically include heaters arranged to heat specific portions of the superconducting elements above their critical temperature, returning them to their normal resistive state. Such a heater can be used to disconnect the current in the superconducting coil when the generated magnetic field is no longer needed. This can be applied to the main field coil of the system or to smaller shim coils which are used to improve the uniformity of the entire magnetic f...

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
Patent Type & Authority Patents(China)
IPC IPC(8): H01F6/00H05B3/00G01R33/3815H01F6/02
CPCH01F6/02H01F6/003G01R33/3815H01F6/005H01F6/00H03H7/46H04Q1/453H05B1/02
Inventor A·M·汤马斯
Owner SIEMENS FRIMLEY