Fundamental Electricity Student Study Notes
... LAB: Sketch and describe how to test a heat element using an ohmmeter, voltmeter and ammeter. Place the probes off your volt meter across the connections to the heat element. Before the heat element is energized it should read near zero volts. If it reads source voltage or ghost voltage the element ...
... LAB: Sketch and describe how to test a heat element using an ohmmeter, voltmeter and ammeter. Place the probes off your volt meter across the connections to the heat element. Before the heat element is energized it should read near zero volts. If it reads source voltage or ghost voltage the element ...
Calculation Of No-load Induction Motor Core Losses Using The Rate
... motor, lamination, and material model, some of which are briefly discussed hereafter. 1) A Posteriori Inclusion of Hysteresis and Eddy Currents: The 2-D field calculations have been done with a single valued curve. Hysteresis and eddy currents have been accounted for a posteriori using the 1-D model ...
... motor, lamination, and material model, some of which are briefly discussed hereafter. 1) A Posteriori Inclusion of Hysteresis and Eddy Currents: The 2-D field calculations have been done with a single valued curve. Hysteresis and eddy currents have been accounted for a posteriori using the 1-D model ...
Principles of Electronic Communication Systems
... The quality (Q) of a series resonant circuit is the ratio of the inductive reactance to the total circuit resistance. Selectivity is how a circuit responds to varying frequencies. The bandwidth of a circuit is inversely proportional to Q. © 2008 The McGraw-Hill Companies ...
... The quality (Q) of a series resonant circuit is the ratio of the inductive reactance to the total circuit resistance. Selectivity is how a circuit responds to varying frequencies. The bandwidth of a circuit is inversely proportional to Q. © 2008 The McGraw-Hill Companies ...
AN2321: Designing for Board Level Electromagnetic
... can be reduced by decreasing the common impedance. Unfortunately, source impedance coupling is inherent to the power supply and cannot be reduced. The same effect occurs in the return-to-ground conductor. Digital return currents that flow in one circuit create ground bounce in the other circuit’s re ...
... can be reduced by decreasing the common impedance. Unfortunately, source impedance coupling is inherent to the power supply and cannot be reduced. The same effect occurs in the return-to-ground conductor. Digital return currents that flow in one circuit create ground bounce in the other circuit’s re ...
Fundamental Electricity Student Study Notes
... LAB: Sketch and describe how to locate a dead short circuit. In a circuit with a dead short the circuit breaker or fuse will be open. If you reset the circuit breaker or replace the fuse it will blow open as soon as the circuit is reenergized. This occurs because total resistance for the circuit is ...
... LAB: Sketch and describe how to locate a dead short circuit. In a circuit with a dead short the circuit breaker or fuse will be open. If you reset the circuit breaker or replace the fuse it will blow open as soon as the circuit is reenergized. This occurs because total resistance for the circuit is ...
PDF
... but this came at the cost of increased chip area given the used ensemble structure. To address this issue proposed to share and reuse some functional modules within the ensemble. In an 8-bit multiplier is reused for the16-bit multiplication, adding scalability ...
... but this came at the cost of increased chip area given the used ensemble structure. To address this issue proposed to share and reuse some functional modules within the ensemble. In an 8-bit multiplier is reused for the16-bit multiplication, adding scalability ...
EMC: electromagnetic compatibility
... c Avoiding cross-coupling (i.e. physically separate two highly incompatible elements) c Desensitizing potential victims (e.g. using shielding) Main causes Any device or physical/electrical phenomenon that emits an electromagnetic disturbance, either conducted or radiated, qualifies as a source. The ...
... c Avoiding cross-coupling (i.e. physically separate two highly incompatible elements) c Desensitizing potential victims (e.g. using shielding) Main causes Any device or physical/electrical phenomenon that emits an electromagnetic disturbance, either conducted or radiated, qualifies as a source. The ...
Single Power-Conversion AC–DC Converter With High Power
... Mode 3 [t2 , t3 ]: At the time t2 , i2 becomes zero and D1 is maintained in the on-state with the zero current. I1 and im are equal during this interval. Therefore, i1 terminates the first resonance and increases linearly as (1). Mode 4 [t3 , t4 ]: At the time t3 , S1 is turned off and D1 is turned ...
... Mode 3 [t2 , t3 ]: At the time t2 , i2 becomes zero and D1 is maintained in the on-state with the zero current. I1 and im are equal during this interval. Therefore, i1 terminates the first resonance and increases linearly as (1). Mode 4 [t3 , t4 ]: At the time t3 , S1 is turned off and D1 is turned ...
Speaker Analysis Using Thiele
... There are many interesting observations that can be drawn from looking at these two graphs. One of the biggest things that you can see is that the resonant frequency is actually shifted down when the speaker is in the cabinet as opposed to in free air. In the graphs, above, the F(s) of the speaker ...
... There are many interesting observations that can be drawn from looking at these two graphs. One of the biggest things that you can see is that the resonant frequency is actually shifted down when the speaker is in the cabinet as opposed to in free air. In the graphs, above, the F(s) of the speaker ...
Resonant inductive coupling
Resonant inductive coupling or electrodynamic induction is the near field wireless transmission of electrical energy between two magnetically coupled coils that are part of resonant circuits tuned to resonate at the same frequency. This process occurs in a resonant transformer, an electrical component which consists of two high Q coils wound on the same core with capacitors connected across the windings to make two coupled LC circuits. Resonant transformers are widely used in radio circuits as bandpass filters, and in switching power supplies. Resonant inductive coupling is also being used in wireless power systems. Here the two LC circuits are in different devices; a transmitter coil in one device transmits electric power across an intervening space to a resonant receiver coil in another device. This technology is being developed for powering and charging portable devices such as cellphones and tablet computers at a distance, without being tethered to an outlet.Resonant transfer works by making a coil ring with an oscillating current. This generates an oscillating magnetic field. Because the coil is highly resonant, any energy placed in the coil dies away relatively slowly over very many cycles; but if a second coil is brought near it, the coil can pick up most of the energy before it is lost, even if it is some distance away. The fields used are predominately non-radiative, near fields (sometimes called evanescent waves), as all hardware is kept well within the 1/4 wavelength distance they radiate little energy from the transmitter to infinity.One of the applications of the resonant transformer is for the CCFL inverter. Another application of the resonant transformer is to couple between stages of a superheterodyne receiver, where the selectivity of the receiver is provided by tuned transformers in the intermediate-frequency amplifiers. The Tesla coil is a resonant transformer circuit used to generate very high voltages, and is able to provide much higher current than high voltage electrostatic machines such as the Van de Graaff generator. Resonant energy transfer is the operating principle behind proposed short range (up to 2 metre) wireless electricity systems such as WiTricity or Rezence and systems that have already been deployed, such as Qi power transfer, passive RFID tags and contactless smart cards.