Almost with Bikeer at the same time, japanese A.Chiba realized magnetoresistive electric machinery first 1990 without bearing technology.
1993, the R.Schoeb of engineering college of federal of Su Li world realizes those who communicate electric machinery not to have bearing technology first.
Obtain actual application without bearing electric machinery, decisive breakthrough was 1998 development goes the Balaida of engineering college of federal of Su Li world without synchronism of bearing permanent magnetism chip electric machinery, electric machinery structure is simple, reduced control system cost greatly, value of very big application is had in a lot of domains.
2000, the S.Sliber development of engineering college of federal of Su Li world goes without bearing single-phase electric machinery, considering to one pace advances on the history without bearing electric machinery again, reduced the cost that controls a system, make applying actually without bearing electric machinery can think not just, and be economy. The electric machinery that resembles mechanical bearing bearing without bearing electric machinery is euqally simple, electric control system is not complex, use in a lot of domains without bearing electric machinery also very economy. We think to be in before long in the future, this kind of technology will obtain wide application in China.
Without characteristic of bearing electric machinery and application
Having bearing electric machinery is the similar sex that produces electromagnetism force principle according to magnetism bearing and electric machinery, install the winding that radial load produces in magnetism bearing on electric machinery stator, through solving Ou control realizes the independent control of pair of electric machinery torsion and force of radial in suspension. Have bearing of magnetism of magnetism in suspension without bearing electric machinery all advantages, need avoids maintenance, macrobian destiny to go, the transmission of asepsis, free from contamination and poisonous and harmful liquid or gas is not to have circumstance of representative application of bearing electric machinery. Got is as follows applied at present.
1. semiconductor industry
In etch, make board, clean or need to use caustic chemical liquid in the treatment process such as polishing, product quality depends on greatly chemical liquid quality, the liquid carries pump is a crucial link. Wait for cankerous chemical liquid like acerbity fluid, organic dissolvent, pump must free from contamination is transmitted reliably, and pump should be had fight corrode and be able to bear or endure the requirement of constant temperature. Traditional pneumatic and chip pump life are brief, great majority is able to bear or endure lukewarm highest only 100 ℃ are controlled, athletic a powerful person and chip still can arise a few atomic, the liquid is transmitted also existing inhomogenous pulsatile, affected craft to tackle quality. Adopt the limitation that in sealing pump to be able to solve a tradition to transmit without bearing report secret, exists, greatly contented and accurate semiconductor device produces craft demand. Current, power is 300W without bearing electric machinery sealed pump has gotten applied in semiconductor industry.
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