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Electrical Harmonics: An Introduction and Overview of What
Electrical Harmonics: An Introduction and Overview of What

C-Bus Network Voltage Calculations
C-Bus Network Voltage Calculations

... Where the power supplies are spread evenly around the network, the formula can still be used. In this case, the half way point between two power supplies is like the end of a run. The voltage will be given by using the formula with half of the number of units (on the run between the two power suppli ...
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... Figure 3. The relationship between operating level, clipping and the noise floor. As you can see, the operating level chosen for any given device has a pretty direct effect on the working signal-to-noise ratio. Pick a level that is too high and you get premature peak clipping (but spectacular noise ...
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... IMPORTANT SAFETY INSTRUCTIONS 15. REPLACEMENT PARTS: When replacement parts are required, be sure the service technician has used replacement parts specified by the manufacturer or those having the same characteristics as the original parts. Unauthorized substitutions may result in fire, electric s ...
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... quency is 40 MHz, which  partly suppresses the drive  switching noise.  However,  additional filtering with a  customizable, multi‐pole  filter is often needed on  each capacitive coupler.  A change was also needed  for the TGA‐B instrument.  All conventional PD  instruments display the PD with resp ...
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... example PE7265) and check the settings of amplifier and reference signal. 15. Increase output voltage and corresponding current Imax of a signal generator up to the value, when the voltage on the detection coil can be detected and measured. Measure this voltage Vdet on the resonance circuit at each ...
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... by frequency converters. Thus, there are two problems to solve: Reducing harmonics to limit values that can be produced by the converters with a simultaneously high power factor, and compensating the inductive reactive power of the other consumers. Modern active power filters are able to solve both ...
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... IV. Directional Coupler and Detector: Critical for Proper Loop Operation The directional coupler and detector are the most critical parts of the control loop system – the feedback loop can generally take care of any other variations in the components. However, any variations in the coupling factor o ...
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... series LC circuit with a high Q factor • Control IC sweeps the half-bridge frequency from maximum down towards the resonant frequency of the LC circuit • Lamp filaments are pre-heated as the frequency decreases and the lamp voltage and load current increase ECE 442 Power Electronics ...
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Decibel

The decibel (dB) is a logarithmic unit that expresses the ratio of two values of a physical quantity, often power or intensity. One of these quantities is often a reference value and in this case the decibel expresses the absolute level of the physical quantity. The number of decibels is ten times the logarithm to base 10 of the ratio of two power quantities, or of the ratio of the squares of two field amplitude quantities. One decibel is one tenth of one bel, named in honor of Alexander Graham Bell; however, the bel is seldom used.The definition of the decibel is based on the measurement of power in telephony of the early 20th century in the Bell System in the United States. Today, the unit is used for a wide variety of measurements in science and engineering, most prominently in acoustics, electronics, and control theory. In electronics, the gains of amplifiers, attenuation of signals, and signal-to-noise ratios are often expressed in decibels. The decibel confers a number of advantages, such as the ability to conveniently represent very large or small numbers, and the ability to carry out multiplication of ratios by simple addition and subtraction. By contrast, use of the decibel complicates operations of addition and subtraction.A change in power by a factor of 10 is a 10 dB change. At the half power point an audio circuit or an antenna exhibits an attenuation of 3dB. A change in voltage by a factor of 10 results in a change in power by a factor of 100, which is a 20 dB change. A change in voltage ratio by a factor of two approximately corresponds to a 6 dB change.The decibel symbol is often qualified with a suffix that indicates the reference quantity that has been used or some other property of the quantity being measured. For example, dBm indicates a reference power of one milliwatt, while dBu is referenced to approximately 0.775 volts RMS.In the International System of Quantities, the decibel is defined as a unit of measurement for quantities of type level or level difference, which are defined as the logarithm of the ratio of power- or field-type quantities.
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