(4) adjust precision suffers be restricted, applicable medium suffers be restricted. Electromagnetism a powerful person has switch only normally two kinds of condition, core of a powerful person can be in two maximums position only, cannot adjust continuously, (the new conception that strive breaks through is not little, but still be in phase of experiment try out) adjust so precision still is restricted certainly.

Electromagnetism a powerful person is clean to medium degree have higher demand, the medium that contains grain condition cannot applicable, if belong to foreign matter beard first filter goes. Additional, ropy shape medium cannot applicable, and, the medium viscosity limits with specific applicable product is opposite narrower.

(5) model is diversiform, use is extensive. Although electromagnetism a powerful person has congenital inadequacy, advantage still very outstanding, become varied product with respect to the design so, satisfy all sorts of different requirement, use is very extensive. The progress of technology of electromagnetism a powerful person also is around move how to overcome congenital inadequacy, how produce inherent advantage better and spread out.

2, the technology of a powerful person of electromagnetism of more of development brief introduction of technology of electromagnetism a powerful person

2.1, cut the development that changes way to come surely to essence of life brief, only simple ability circulates for a long time. This also is the permanent pursuit of scientist and engineer.

(1) simplify control loop before carry out implement use pneumatic and electric control return circuit in great quantities, this increased systematic complexity, and forerunner electromagnetism a powerful person forms the control return circuit that uses working medium oneself inside a powerful person, structural terribly is simple. Multinomial technology parameter still gets a powerful person of domestic and international in the past electromagnetism limitation, domestic electromagnetism a powerful person connects diameter to already expanded now to 30Omm; Medium temperature is low to- - 200 ℃ , come high 450 ℃ ; Actuating pressure arrives from vacuum 25MPa. Behavioral time arrives from ten seconds a few millisecond. The new development of these technologies can replace original bulk completely already of the two position control with astronomical high price cut off quickly a powerful person uses switch a powerful person compatibly, dynamoelectric switch a powerful person, also can replace the pneumatic that adjusts continuously, dynamoelectric control valve partly. (how is ability satisfied better adjust precision requirement, later development even remark) . The industry such as foreign spin, light industrial, city building already converted in great quantities electromagnetism a powerful person, and the industry such as metallurgy, chemical industry takes the lead in using more and more electromagnetism a powerful person in support system.
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