smash the control machine lyrics

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Ngày tải lên: 21/02/2014, 16:20

... the more people participate in the media, the more they hate the media The greater the participation, the greater the paranoia that the media are in control But I’ve watched journalists cover ... afraid of the government They are afraid of their audiences and advertisers The media do not control you They pander to you See, I don’t believe that the convulsions roiling the media augur the apocalypse ... to their public because, if they lose that allegiance, they lose money Sometimes the press leads the public; sometimes the public leads the press The media, at least the mainstream media, don’t

Ngày tải lên: 17/03/2014, 16:20

... equations) around 1860 The knowledge was ripe for the invention of the induction machine which has two fathers: Galileo Ferraris (1885) and Nicola Tesla (1886) Their induction machines are shown ... currents in the short-circuited (or closed) windings of the rotor The interaction between the stator produced field and the rotor induced currents produces torque and thus operates the induction ... applications, the induction motor seems now ready to make the electric starter/generator system aboard the hybrid vehicles of the near future The new challenges in modeling, and optimization design in the

Ngày tải lên: 21/03/2014, 12:13

... on the part of the machine not connected to the grid (the rotor, or the mover in general), - the secondary If the windings on the secondary (rotor) are closed, a.c currents occur in the rotor The ... single phase In both cases the winding arrangement on the part of the machine–the primary–connected to the grid (the stator in general) should produce a traveling field in the machine airgap This traveling ... cases the internal primary is the mover and the external secondary is at a standstill In most rotary IMs, the primary is the stator and the secondary is the rotor Not so for linear induction machines

Ngày tải lên: 21/03/2014, 12:13

... The slots are rectangular and so are the conductors The slot filling factor increases due to this combination The insulation of the. .. coil windings are the enamel insulation on the ... specifies that the insulation test voltage shall be twice the rated voltage plus 100 V applied to the stator winding for 1 minute The heat produced by the winding currents and the core ... which are then cured to solids by heating During the cure, the conductors may be constrained to size to enter the slot... drives) The stator laminations are insulated from each other by

Ngày tải lên: 21/03/2014, 12:13

... For the fundamental, ν = 1, we obtain the maximum amplitude. The higher the order of the harmonic, the lower its amplitude in (4.8). While in principle such a primitive machine works, the ... for reversible motion when the capacitor is connected to either of the two... one layer and the other side in the second layer They are connected observing the inward (A, B, C) and outward ... 1, respectively, the mmf waves for the two pole counts travel in the same direction On the other hand, if 2p1 = 6K1 + 2(4) and 2p2 = 6K2 + 4(2), the mmf waves for the two pole counts

Ngày tải lên: 21/03/2014, 12:13

... replaced by the actual (designed) maximum flattened flux density Bgm, at an angle θ = 30°/p1, which makes the length of the flux lines in the back core 2/3 of their maximum length Then finally the calculated ... have consequences in the phase current waveforms for the two connections Finally, the saturation produced third and other harmonics influence, notably the core loss in the machine This aspect ... (influence, at least) the mmf step harmonics Many of them will be attenuated by rotor-cage-induced currents To further complicate the picture, the magnetic saturation of the stator (rotor) teeth

Ngày tải lên: 21/03/2014, 12:13

... respectively. As the pole pitch of the harmonics is τ/ν, their fields do not reach the back cores and thus their saturation factor K s ν is smaller then K s . The higher ν, the closer K s ν ... the two equations to obtain WK E1... cross the airgap to define the magnetization inductance L1m, there are leakage fields that encircle either the stator or the rotor conductors The ... rotor phases In reality the flux in the rotor varies at Sf1 frequency, while in the stator at f1 frequency The amplitude is the same and, with respect to each other, they are at stall Now

Ngày tải lên: 21/03/2014, 12:13

... Trang 8The lower the power factor at ideal no-load, the lower the core loss in the machine (the winding losses are low in this case) In general, when the machine is driven under load, the value of ... constitute the IM equations per phase reduced to the stator for the rotor circuit Notice that in these equations there is only one frequency, the stator frequency ω1, which means that they refer ... thus flows from the power source into the machine On the other hand, with n > 0, n1(ω1) < 0, the torque Te is negative; it is opposite to motion direction That is braking The same is true

Ngày tải lên: 21/03/2014, 12:13

... from the power grid at the frequency f1 and the other at frequency f2 from a limited power frequency converter The machine speed n is n= f1 ± f 2 p1 + p 2 (8.71) The smaller f2, the ... under steady state and the machine behaves like a synchronous machine with the torque dependent on the power angle δ (S = f2/f1 = ct) On the other hand, the frequency f2 may be ... torque response claims with rotor flux vector control The bonus is that for constant rotor flux the mathematics to handle the control is the simplest This explains enormous commercial

Ngày tải lên: 21/03/2014, 12:13

... IN THE END RINGS VIA THE MULTILAYER APPROACH As the end rings are placed in air, although rather close to the motor laminated stack, the skin effect in them is routinely neglected However, there ... = 60 Hz Let us determine the skin effect in the stack zone for the two cases, if lstack/lturn = 0.5 Solution As the elementary conductor is the same in both cases, the first skin effect resistance ... located outside the lamination stack, mainly in air: the end turns or endrings The skin effect for conductors in air is less pronounced than in their portions in slots As the machine power or

Ngày tải lên: 21/03/2014, 12:13

... order is a multiple of the number of slots (10.12) The stator (rotor) mmfs may produce harmonics of the same order either as sourced in the mmf or from the interaction with the first airgap magnetic ... πτµ The saturation coefficient Kst in (10.40) refers to the teeth zone only as the harmonics wavelength is smaller than that of the fundamental and therefore the flux paths close within the airgap ... the stator mmf (or its airgap flux density) produces in the rotor cage currents whose mmf harmonic has the same order ν The synchronous speed of these harmonics ω1ν (in electrical terms) is The

Ngày tải lên: 21/03/2014, 12:13

... when the IM is static converter fed, and thus the voltage time harmonics content depends on the type of the converter and the pulse width modulation used with it. The space harmonics in the ... and augmenting each other, respectively, in the airgap flux density. For these mmf harmonics, the winding factor is equal to that of the fundamental. This is why they are the most important, ... the rotor slot occurs Consequently, the rotor leakage flux is concentrated close to the rotor surface The “volume” where the core losses occur in the rotor decreases In general then,

Ngày tải lên: 21/03/2014, 12:13

... (induction) machines, the thermal energy flows from the windings in slots to laminated core teeth through the conductor insulation and slot line insulation. On the other hand, part of the thermal ... break the motor axially into a few segments and “thermally” connect these segments together To account for thermal transients, the thermal equivalent circuit should contain thermal... – thermal ... – thermal resistance from end connections to the air above them Rt9 – thermal resistance from end connections to the air below them... convention, through the circulating air in the machine

Ngày tải lên: 21/03/2014, 12:13

... diRiV θ+ The first term represents the winding losses, the second, the stored magnetic energy variation, and the third, the electromagnetic power Pe [ ] [ ][ ] r er T 1 r e d Ldi2 1pT θ =ω The electromagnetic ... Chapter 6, the leakage flux circumferential flux lines at high currents influence the main (radial) flux and contribute to the resultant flux in the machine core The saturation in the stator ... IMs), the cdr – cqr windings account for the skin effect via the double-cage equivalence principle Let us consider also that the core loss windings are coupled to the other windings only by the

Ngày tải lên: 21/03/2014, 12:13

... limitations concerning the torque/speed envelope deliverable by the induction motor. The first one is the mechanical characteristic of the induction machine itself and the second is the temperature ... the specifications for the entire speed range as the load torque is below the available motor torque Again the torque in Nm is the same for both motors and the choice between the ... Knowing the motor geometry and the loss breakdown, the thermal aspects (design) may be approached Finally, if the temperature rise or other performance are not satisfactory, the design

Ngày tải lên: 21/03/2014, 12:13

... efficiency, the current density in the rotor bar jb = 3.42 A/mm2 The rotor slot area Ab is 2 6 6 b b 1042.36.279J 2sin2 6.279N psin2 II r 1 The current density in the end ring Jer = (0.75 – 0.8)Jb The ... phase winding The zone factor Kq1 is 9598.018sin3 5.0q sinq6 72sin y2sin The number of turns per phase is based on the pole flux φ, g iτLBα = The airgap flux density is recommended in the intervals ... choose Ns ≠ Nr = 36/28 As the starting current is rather large–high efficiency is targeted–the skin effect is not very pronounced Also, as the locked rotor torque is large, the leakage inductance

Ngày tải lên: 21/03/2014, 12:13

... case the leakage inductance of the rotor bar field in the radial channels is to be considered The two phenomena are lumped into lgeo (the geometrical stack length) The lengths of bars outside the ... coils The slots are open in the stator so that the coils may be introduced in slots after prefabrication (Figure 16.4) The number of slots per pole/phase q1 is to be chosen rather large as the ... starting or limited speed-control applications, wound rotors are used To cover most of these practical cases, we will unfold a design methodology treating the case of the same machine with: high voltage

Ngày tải lên: 21/03/2014, 12:13

... the insects at the bottom of the column when the fumigant was applied at the upper layer of the grain. Addition of CO 2 and circulation caused 100% kill at the different heights. Increasing the ... layer is then separated and extracted with petroleum ether. Finally, the petroleum ether is evaporated under a stream of air. The unknown ITC obtained 392 E. Shaaya and M. Kostyukovsky from the seeds ... facilitate the hydrolysis of sinigrin to ITC by the enzyme myrosinase which is found inside the seeds. The second step is steam distillation with use of the Dean–Stark apparatus (Leoni et al., 1997). The yellow...

Ngày tải lên: 25/10/2013, 05:20

... on the natural ßavor and color of the juice products. In a recent survey, the majority (78%) of cider pro- ducers in Virginia indicated that they do not pasteurize their cider. 16 In another ... juices. 36,44–46 Some of these studies have shown that the lower the food’s pH, the higher the number of microorganisms inactivated by HPP, as has been observed with the inactivation rates of ... do users determine the effectiveness of an alternative process- ing technology? These are but a few of the signiÞcant issues being addressed. The IFT/FDA scientiÞc review of the alternative processing...

Ngày tải lên: 25/10/2013, 21:20