harmonic elimination in vsc hvdc system using she-pwm
... converter is assumed to be constant and the ac network is assumed to be balanced. However, fluctuations at various frequencies often occur on the dc side which usually appears as harmonics of the ac-side operating frequency. The most significant harmonic introduced to the dc-side voltage spectrum by ...
... converter is assumed to be constant and the ac network is assumed to be balanced. However, fluctuations at various frequencies often occur on the dc side which usually appears as harmonics of the ac-side operating frequency. The most significant harmonic introduced to the dc-side voltage spectrum by ...
Transmitters
... • FREQUENCY MODULATION (FM) - The audio signal varies the Frequency of the RF Carrier - its Amplitude stays constant ...
... • FREQUENCY MODULATION (FM) - The audio signal varies the Frequency of the RF Carrier - its Amplitude stays constant ...
Capacitor Self
... common axis. You will find that it is necessary to keep the coils stationary during the measurements or the measurements will change with time causing frustration! You may find it helpful to insert a pen or pencil through the two coils to stabilize them while you make your measurements. 3. Set the f ...
... common axis. You will find that it is necessary to keep the coils stationary during the measurements or the measurements will change with time causing frustration! You may find it helpful to insert a pen or pencil through the two coils to stabilize them while you make your measurements. 3. Set the f ...
ee301 - series circuits, kirchhoff`s voltage law
... Current is similar to water flowing through a pipe. Current leaving the element (e.g., a resistor) must be the same as the current entering the element. If two elements are in series, the same current passes through them. A series circuit is constructed by connecting elements in series. The same cur ...
... Current is similar to water flowing through a pipe. Current leaving the element (e.g., a resistor) must be the same as the current entering the element. If two elements are in series, the same current passes through them. A series circuit is constructed by connecting elements in series. The same cur ...
Document
... an internal impedance of 184+j0 Ω and a maximum voltage of 245.20 V, and it is operating at 800 rad/s. The transformer parameters are R1 = 100Ω, L1 = 0.5 H, R2 = 40Ω, L2 = 0.125 H, and k = 0.4. Calculate : a). The reflected impedance, b). The primary current, c). The secondary current, and d). The a ...
... an internal impedance of 184+j0 Ω and a maximum voltage of 245.20 V, and it is operating at 800 rad/s. The transformer parameters are R1 = 100Ω, L1 = 0.5 H, R2 = 40Ω, L2 = 0.125 H, and k = 0.4. Calculate : a). The reflected impedance, b). The primary current, c). The secondary current, and d). The a ...
TSM9634F - Silicon Labs
... and to keep the physical size of RSENSE small. If the external RSENSE is allowed to dissipate significant power, then its inherent temperature coefficient may alter its design center value, thereby reducing load current measurement accuracy. Precisely because the TSM9634F’s input stage was designed ...
... and to keep the physical size of RSENSE small. If the external RSENSE is allowed to dissipate significant power, then its inherent temperature coefficient may alter its design center value, thereby reducing load current measurement accuracy. Precisely because the TSM9634F’s input stage was designed ...
AD622 data sheet
... The AD622 is a low cost, moderately accurate instrumentation amplifier that requires only one external resistor to set any gain between 2 and 1,000. Or for a gain of 1, no external resistor is required. The AD622 is a complete difference or subtracter amplifier “system” while providing superior line ...
... The AD622 is a low cost, moderately accurate instrumentation amplifier that requires only one external resistor to set any gain between 2 and 1,000. Or for a gain of 1, no external resistor is required. The AD622 is a complete difference or subtracter amplifier “system” while providing superior line ...
Data Analysis Exercise
... In the data above for the frequency of 7.75 x 1014 Hz, a voltage of 1.5 V stopped the most energetic electron from crossing the gap. Use the data above to calculate the following: Show all working out [4 marks] The magnitude of the electric force decelerating the electron (in newtons) Fe (N) [2 ...
... In the data above for the frequency of 7.75 x 1014 Hz, a voltage of 1.5 V stopped the most energetic electron from crossing the gap. Use the data above to calculate the following: Show all working out [4 marks] The magnitude of the electric force decelerating the electron (in newtons) Fe (N) [2 ...
charging system
... •It monitors both battery and stator voltages and depending on the measured voltages, the regulator will adjust the amount of rotor field current to control alternator output. •Electronic voltage regulator introduces more resistance between the rotor windings and battery to reduce the alternator out ...
... •It monitors both battery and stator voltages and depending on the measured voltages, the regulator will adjust the amount of rotor field current to control alternator output. •Electronic voltage regulator introduces more resistance between the rotor windings and battery to reduce the alternator out ...
A Current-Mode Square-Rooting Circuit Using Negative Feedback Technique
... instrumentation. For example it can be used to compute the Euclidean distance between two vectors[1], or to calculate the r.m.s. value of an arbitrary waveform[2]. In the past, squarerooting circuit was proposed by using operational amplifiers(op-amp) and bipolar junction transistors[3]. This approa ...
... instrumentation. For example it can be used to compute the Euclidean distance between two vectors[1], or to calculate the r.m.s. value of an arbitrary waveform[2]. In the past, squarerooting circuit was proposed by using operational amplifiers(op-amp) and bipolar junction transistors[3]. This approa ...
Resistive opto-isolator
Resistive opto-isolator (RO), also called photoresistive opto-isolator, vactrol (after a genericized trademark introduced by Vactec, Inc. in the 1960s), analog opto-isolator or lamp-coupled photocell, is an optoelectronic device consisting of a source and detector of light, which are optically coupled and electrically isolated from each other. The light source is usually a light-emitting diode (LED), a miniature incandescent lamp, or sometimes a neon lamp, whereas the detector is a semiconductor-based photoresistor made of cadmium selenide (CdSe) or cadmium sulfide (CdS). The source and detector are coupled through a transparent glue or through the air.Electrically, RO is a resistance controlled by the current flowing through the light source. In the dark state, the resistance typically exceeds a few MOhm; when illuminated, it decreases as the inverse of the light intensity. In contrast to the photodiode and phototransistor, the photoresistor can operate in both the AC and DC circuits and have a voltage of several hundred volts across it. The harmonic distortions of the output current by the RO are typically within 0.1% at voltages below 0.5 V.RO is the first and the slowest opto-isolator: its switching time exceeds 1 ms, and for the lamp-based models can reach hundreds of milliseconds. Parasitic capacitance limits the frequency range of the photoresistor by ultrasonic frequencies. Cadmium-based photoresistors exhibit a ""memory effect"": their resistance depends on the illumination history; it also drifts during the illumination and stabilizes within hours, or even weeks for high-sensitivity models. Heating induces irreversible degradation of ROs, whereas cooling to below −25 °C dramatically increases the response time. Therefore, ROs were mostly replaced in the 1970s by the faster and more stable photodiodes and photoresistors. ROs are still used in some sound equipment, guitar amplifiers and analog synthesizers owing to their good electrical isolation, low signal distortion and ease of circuit design.