No More Shielded Cables for Motors because of Nanocrystalline Absorbers

Transcription

1 No More Shielded Cables for Motors because of Nanocrystalline Absorbers CoolTube Nanocrystalline Absorbers eliminates the emissions Radiated emissions Why they have to be eliminated Shielded cables They are needed to reduce radiated emissions State of the art Cables are needed to transfer the Energy

2 Cable How did I get to Cable by luck I m not a specialist of Cable but I like Mountain biking and Nanocrystalline Materials. The Half Epic MTB ride 2015 in Cable Wisconsin.

3 Pictures Enter your sub headline here Variable Frequency Drives creates EMC noise

4 Conducted emissions Measured by Rogowski coils

5 Pictures Enter your sub headline here Source of pictures Variable Frequency Drives creates EMC noise conducted and radiated depending on the cable length and types

6 What is important for the cables to minimize radiated emissions: Symmetric cables Shielding of the whole cable Shielding parts of the cable The best would be to avoid the radiation Is this possible?

7 Enter your sub headline here The root cause of the radiated emissions is the switching of the IGBT s Most important is the du/dt OK Test the part The switching frequency is how often it happens Harmonics of the du/dtare in the Megaherz range up to Gigaherz Interference with other machines Solutions: Distance; Shielding; Absorption

8 Grid with Impedances and interaction of noise Inverter

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10 Solution: Inductor Tube

11 Target: Reduce noise level without shielded motorcable

12 Starting of investigation 150 m unshielded motor cable Motor Drive First solution block of Nanoperm Cores M-649 with 3 turns Inductor 150 m unshielded cable

13 Without choke And 150 m Unshielded motor cable Above the requested standard limits Stacked Nanoperm Cores M-649 with 3 turns Inside of the requested standard limits

14 Enter your sub headline here Drive with Motor cable Radiated Noise measurement 50 m motor cable up to 150 motor cable and more Frequency rang 100 Kilohertz up to 1 Gigahertz

15 Nanocrystalline Absorbers: Produced from amorphous tape nanocrystallized while 10 hours annealing under Hydrogen at about 600 C and magnetic field

16 Special stacked Nanocrystalline Cores Function is the combination of an Inductor and an Absorber Changing dangerous emissions to safe thermal energy Annealed for High frequencies in the range up to 1 Gigaherz Working already from nearly Direct Current DC Easy to mount Prototype

17 Drive About 3 kw Motor cable unshielded up to 150 m Nanocrystalline Absorber Trademark CoolTube Motor

18 Roadmapping Quarter more Fieldtests for up to 3 kw Quarter Fieldtests for Up to 30 kw Quarter Fieldtests for Up to 75 kw Quarter Fieldtestsup to 315 kw 2017 Fieldtestfor the whole rang e up to 1,2 MW Nanocrystalline Absorbers: Prototype

19 More info s under Websearch: magnetec cooltube USA

20 Hans-Joachim Poess Head of Development Magnetec GmbH Industriestrasse 7 D Langenselbold Germany Tel hpoess@magnetec.de

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23 Tape wound core made out of a melt

24 Whatistheeffectof theinductiveabsorbers? Without inductive Absorbers With inductive Absorbers

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26 Calculation Imax Nanoperm of µr B=µ0*µr*H H= I*N/lfe magnetic field (A/m) B=µ0*µr*Imax*N/lfe magnetic induction (Vs/Am) B= 1 Vs/Am material constant Nanoperm (1,2T) 20 % savetymargin µ0= 4*pi*10^-7 Vs/m² constant Imax= (B*lfe)/(µ0*µr*N) µr relative Permeability; N=turn no. Lfe middle pathlength)

27 Imax= (B*lfe)/(µ0*µr*N) Exampleson onecoredimension 63x50x30 mm Imax (µr=30000) = 4,8 A Imax (µr=1000) = 143A Imax(µr=500) = 286 A Dimensioning Imax calculation

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