Entering in R&D labs and estimating the result value :
US Army : magic ring https://worldwide.espacenet.com/searchResults?submitted=true&locale=en_EP&DB=EPODOC&ST=advanced&TI=&AB=magic+ring&PN=&AP=&PR=&PD=&PA=us+army&IN=leupold&CPC=&IC=&Submit=Search
or surpass this rotational concept and realize directly an ultra-cheap linear and static dynamo !? :http://www.powerguru.org/planar-transformers-are-essential-for-truly-efficient-electrichybrid-vehicles/ It is common for a 5kW planar transformer to cost in the region of $23 nowadays, and in volumes of 100k+ prices below $10 per piece are easily achievable.
Moreover, in the 2kW-30kW power range, the use of pre-formed copper ‘lead-frames’ in single and multi-turn forms can achieve virtually any desired turns ratio at low cost, allowing rapid design iteration and ultimately improved time to market.
Advantages of Planar Transformers
• High Efficiency• Low Weight• Low Profile• Low Leakage Inductance• Highly Efficient Cooling• Multiple Topologies• Multiple Winding Options• Customised Terminations• Dimensional Accuracy• Tightly Controlled Parasitics
It is extremely exciting to be leading a planar transformer company through the efficiency revolution that we are embarking upon. With hybrid/electric vehicles at the forefront, we are also experiencing huge demand from the defence/military, solar/wind power, medical and induction heating/charging sectors.
The planar transformer market is set for significant growth over the next few years and one thing is certain, if you’re not using or considering using a PLANAR TRANSFORMER, then your competitors surely are.
included US Navy R&D ? :https://worldwide.espacenet.com/publicationDetails/biblio?DB=EPODOC&II=0&ND=3&adjacent=true&locale=en_EP&FT=D&date=20010710&CC=US&NR=6259347B1&KC=B1
In a design of a test transformer, a 2 kva (2 kW) power transformer providing1.2 lb/kW
was constructed using modern state-of-the-art techniques well known to those skilled in the art. The design measures 3.02 inches by 3.17 inches by 2.22 inches, and weighed 2.4 pounds. In tests, the transformer constructed according to state-of-the-art techniques, after 40 minutes, showed a windings temperature of 200 DEG C. at the center of the windings and suffered catastrophic failure due to excess heat (FIG. 2). A duplicate transformer 10 weighing approximately 0.21 lb/kW
was constructed utilizing the technology set forth in this invention with the K1100 conductive strips 16 placed within the windings 14 of the transformer. The design measured 3.02 inches by 3.17 inches by 2.22 inches and weighed 2.4 pounds. In tests, the transformer 10 with the thermally conductive strips 16 placed alternately between windings (FIG. 1) showed, after approximately 40 minutes, a windings 14 temperature of approximately 70 DEG C. without failure (FIG. 3).This invention allows for the reduction in size of a high power transformers by a factor of 4 to 8 and a reduction in weight by a factor of 4 to 6, and an increase in power density by 5 to 10 in power
. The efficiency of the transformer is improved by maximizing the heat transfer from the transformers interior and minimizing voltage breakdown. The thermal properties of each core 12 will dictate the quantity of the thermally conductive strip 16 material required to lower the transformer temperature to a predetermined level, some testing may be required to established the optimal amount needed to provide proper cooling.Although this embodiment has been described in relation to an exemplary device such as a transformer, the claimed invention may equally well be utilized in other types of electrical devices where internal heat is a problem, such as motors, modulation transformers, etc. The size of the transformer is not of concern, it may vary from a small transformer used in switching power supplies to power transformers used in electrical distribution systems. Further, the frequency of the electrical current within the devices to be cooled is irrelevant, e.g., 60 cycles to 400 cycles operate the same thermally. High frequency transformers have higher copper losses due to skin effects. This additional heat may also be removed by the thermally conductive strip as set forth in this invention.
This material and costs saving results implementing in a vacuum chamber device :https://worldwide.espacenet.com/searchResults?submitted=true&locale=en_EP&DB=EPODOC&ST=advanced&TI=&AB=&PN=&AP=&PR=&PD=&PA=motoshita+mitsukuni&IN=&CPC=&IC=&Submit=Searchhttps://worldwide.espacenet.com/publicationDetails/biblio?DB=EPODOC&II=6&ND=3&adjacent=true&locale=en_EP&FT=D&date=19880106&CC=JP&NR=S631364A&KC=A
a ring in a tunnel : Hyperloop generator ;Maglev principlehttps://worldwide.espacenet.com/publicationDetails/biblio?DB=EPODOC&II=0&ND=3&adjacent=true&locale=en_EP&FT=D&date=19880525&CC=JP&NR=S63121233A&KC=A