Tài liệu Power Electronic Handbook P18 pptx

... PCU output power. When the PCU output power reaches a maximum level, the input resistance is fixed at the value that produces this level. Presumably when output power is a maximum, input power is ... maximum power from the array. This is done by incorporating maximum power- tracking circuitry into the PCU. Figure 18.4 shows the I – V characteristics of an array with the max...

Ngày tải lên: 13/12/2013, 00:15

... (MCTs). Rectifiers, in general, are widely used in power electronics to rectify single-phase as well as three-phase voltages. DC power supplies used in computers, consumer electronics, and a host of other applications typically ... the same power capacity. The advantages of DC transmission over AC should not be misunderstood and DC should not be considered as a general substitute for AC...

Ngày tải lên: 25/01/2014, 13:20

... for power electronics systems. Obviously, advances in raw processing power for personal computers as well as the rapid devel- opment of electronic design software have influenced the field of power ... the simulation of power electronics systems proved to be difficult from the outset, because power electronics circuits typically operate in a highly discontinuous mode, with power se...

Ngày tải lên: 13/12/2013, 00:15

... conductor loop. This fundamental principle has important consequences for parasitic coupling in electronic hardware, such as a noisy circuit on a printed circuit board of a computer. The problem ... (1791–1867) experimented with magnetic fields. He wound two coils on an iron ring. When one coil was powered from a battery, he noticed that a transient voltage developed on the second coil and,...

Ngày tải lên: 13/12/2013, 00:15

... electrical loads in the MEC power systems. As is described in Refs. 5 through 8, most of the future electic loads require power electronic controls. In future automobiles, power electronics will be used ... addition, power management strategy can help optimize the size of the generators and batteries [11]. Figure 21.5 shows an advanced aircraft power system architecture in which t...

Ngày tải lên: 13/12/2013, 00:15

... compensation • Increase the power angle, i.e., phase shift One can also reverse the power flow by changing the sign of the power angle; i.e., a positive power angle will correspond to a power flow from sending ... controller. © 2002 by CRC Press LLC today’s power systems. This chapter describes specifically the Unified Power Flow Controller known as the UPFC. This power electr...

Ngày tải lên: 13/12/2013, 00:15

... Kessinger, J. P., Advanced power electronics as an enabler of unbundled power quality services, in Proceedings of the NSF Conference on Unbundled Power Quality Services in the Power Industry, Key West, ... constrained power planning and oper- ations in competitive market [27], DSM, and computer technologies in FRIENDS [28] are under way. 19.4 The Advanced Power Electronic...

Ngày tải lên: 13/12/2013, 00:15

... various power quality events. The IEEE Emerald Book (IEEE Standard 1100-1999, IEEE Recommended Practice for Power and Grounding Electronic Equipment ) defines power quality as: The concept of powering ... to active power filters, because the term active power filters is misleading to either active filters for power or filters for active power. Therefore, this section takes the...

Ngày tải lên: 13/12/2013, 00:15

... elemental analysis. General Principles The characteristic spectrum an atom produces reflects the electronic structure of the atom. Changes in the energy of the valence or outer shell electrons ... of electron configurations produces a spectroscopic term that describes the state of the atom. Electronic Energy Levels. The simplest atoms, such as hydrogen and the alkali metals, have only...

Ngày tải lên: 13/12/2013, 04:15

... Phoenix, 1999, 1178. 39. Corzine, K. A. and Sudhoff, S. D., High state count power converters: an alternate direction in power electronics technology, SAE Trans. J. Aerospace, SAE paper number 981266 ... 5th European Conference on Power Electronics and Applications, Brighton, U.K., 1993, 134. 8. Seki, N. and Uchino, H., Converter configurations and switching frequency for a GTO reactive...

Ngày tải lên: 25/01/2014, 13:20