Dual E-shaped high frequency exciter

Patent metadata

Field	Value
Publication number	US-9587971-B2
Application number	US-201514806193-A
Country	US
Kind code	B2
Filing date	Jul 22, 2015
Priority date	Jul 22, 2015
Publication date	Mar 7, 2017
Grant date	Mar 7, 2017

Abstract

An exciter associated with a mass flow primary comprises a rigid plate comprising a base, two outer struts, and an inner strut; at least one electromagnet formed over the inner strut; a protection circuit associated with the electromagnet; and an exciter circuit configured to induce a current in said electromagnet in order to cause vibration of said exciter.

First claim

What is claimed is:

1. An exciter comprising:
a rigid plate comprising a base, two outer prongs, and an inner prong;
at least one electromagnet formed over said inner prong;
a protection circuit associated with said electromagnet wherein said protection circuit further comprises at least three resistors and a Zener diode arranged in parallel; and
an exciter circuit configured to induce a current in said electromagnet in order to cause vibration of said exciter.

2. The exciter of claim 1 wherein said rigid plate comprises a silicon steel plate configured to reduce alternating flux, reduce resistance, and provide operation at high frequency.

3. The exciter of claim 1 wherein said at least one electromagnet comprises at least two wire windings configured to provide high quality magnetic force and strong magnetic field.

4. The exciter of claim 3 further comprising a bone structure configured to engage said electromagnet and said rigid plate.

5. The exciter of claim 4 further comprising a current inlet pin and a current outlet pin.

6. The exciter of claim 1 further comprising a mass, flow meter, wherein said at least one exciter is configured to mount on a flow tube associated with said mass flow meter.

7. A system for inducing vibration in a mass flow primary comprising:
two exciters fixedly attached to tubes of a mass flow primary, each of said two exciters comprising:
a rigid plate comprising a base, two outer prongs, and an inner prong;
at least one electromagnet formed over said inner prong;
a power source configured to provide power to said electromagnet; and
a protection circuit configured to induce a current in said electromagnet in order to cause vibration of said exciter, wherein said protection circuit further comprises at least three resistors and a Zener diode arranged in parallel.

8. The system of claim 7 wherein said rigid plate comprises a silicon steel plate configured to reduce alternating flux, reduce resistance, and provide operation at high frequency.

9. The system of claim 8 wherein said at least one electromagnet comprises a plurality of layers of wire windings configured to provide high quality magnetic force and strong magnetic field.

10. The system of claim 9 further comprising a bone structure configured to engage said electromagnet and said rigid plate.

11. The system of claim 10 further comprising a current inlet pin and a current outlet pin configured to provide power from said power source to said at least one electromagnet.

12. A method for inducing vibration of a tube comprising:
fixedly attaching at least one exciter to at least one tube;
providing power to at least one electromagnet formed on an inner prong of a rigid plate comprising a base, two outer prongs, and said inner prong in order to induce mechanical motion;
regulating said power to said at least one electromagnet with a protection circuit wherein said protection circuit further comprises at least three resistors and a Zener diode arranged in parallel; and
adjusting said power provided to said electromagnet to match a natural frequency of said at least one tube thereby inducing vibration of said tube.

13. The method of claim 12 further comprising:
reducing alternating flux;
reducing resistance; and
providing operation of said exciter at high frequency by configuring said rigid plate as a silicon steel plate.

14. The method of claim 12 further comprising providing said at least one electromagnet as a plurality of layers of wire windings configured to provide high quality magnetic force and strong magnetic field.

15. The method of claim 14 further comprising configuring a bone structure to engage said electromagnet and said rigid plate.

16. The method of claim 12 wherein providing power to at least one electromagnet further comprises providing current to a current inlet pin and a current outlet pin.

Assignees

• Honeywell Int Inc

Inventors

• Fan Xianyong
• Huang Chuang
• Song Guokun

Classifications

• G01F1/8422 Primary

  exciters · CPC title