parasitic-oscillatio..
... Finally, a trick that radio hams used to use is to wave a neon bulb near the output tubes. Apparently if there were parasitics, the bulb would glow because of the RF field. I don't know if this would work on amps as well as it did on radio transmitters, mind you, the fields won't be as strong. You c ...
... Finally, a trick that radio hams used to use is to wave a neon bulb near the output tubes. Apparently if there were parasitics, the bulb would glow because of the RF field. I don't know if this would work on amps as well as it did on radio transmitters, mind you, the fields won't be as strong. You c ...
Active and reactive power control and quality
... Further tremendous proliferation of power electronics load may produce different power quality problems such as harmonics, unbalancing, excessive neutral current, etc. [4]. Figure-1 represents the harmonic voltage distortion at point-of-common-coupling (PCC) due to harmonic current flowing through t ...
... Further tremendous proliferation of power electronics load may produce different power quality problems such as harmonics, unbalancing, excessive neutral current, etc. [4]. Figure-1 represents the harmonic voltage distortion at point-of-common-coupling (PCC) due to harmonic current flowing through t ...
Basics on electric motors
... was initiated by accident when one DC generator was accidentally connected to another in 1873, producing motion and leading Zenobe Gramme to realize that his generators could also be used as motors. The first AC motors (synchronous and then induction) were invented by Tesla in the 1880s. Electric mo ...
... was initiated by accident when one DC generator was accidentally connected to another in 1873, producing motion and leading Zenobe Gramme to realize that his generators could also be used as motors. The first AC motors (synchronous and then induction) were invented by Tesla in the 1880s. Electric mo ...
IMPEDANCE MATCHING NETWORKS APPLIED TO RF POWER TRANSISTORS 1. INTRODUCTION
... but also shows that the load, in first approximation, is not related to the device, except for V CE(sat). The load value is primarily dictated by the required output power and the peak voltage; it is not matched to the output impedance of the device. At higher frequencies this approximation becomes ...
... but also shows that the load, in first approximation, is not related to the device, except for V CE(sat). The load value is primarily dictated by the required output power and the peak voltage; it is not matched to the output impedance of the device. At higher frequencies this approximation becomes ...
บทที่ 6 Special Transformers
... isolate the output from the input and to reduce the weight and cost of the unit. • In other applications, such as in aircraft, there is a strong incentive to minimize weight. These objectives are best achieved by using a relatively high frequency compared to, say, 60 Hz. Thus, in aircraft the freque ...
... isolate the output from the input and to reduce the weight and cost of the unit. • In other applications, such as in aircraft, there is a strong incentive to minimize weight. These objectives are best achieved by using a relatively high frequency compared to, say, 60 Hz. Thus, in aircraft the freque ...
LTC1757A-1/LTC1757A-2 - Single/Dual Band
... An autozero system is included to improve power programming accuracy over temperature. This section cancels internal offsets associated with the Schottky diode detector and control amplifier. External offsets associated with the DAC driving the PCTL pin are also cancelled. Offset drift due to temper ...
... An autozero system is included to improve power programming accuracy over temperature. This section cancels internal offsets associated with the Schottky diode detector and control amplifier. External offsets associated with the DAC driving the PCTL pin are also cancelled. Offset drift due to temper ...
Phase Shifted Full Bridge, Zero Voltage
... With switch QD turned off, the primary current continues to flow using the switch output capacitance, CD to provide the path. This charges the switch capacitance of QD from essentially zero volts to the upper voltage rail, Vin+. Simultaneously, the transformer capacitance (Cxfmr) and the output capa ...
... With switch QD turned off, the primary current continues to flow using the switch output capacitance, CD to provide the path. This charges the switch capacitance of QD from essentially zero volts to the upper voltage rail, Vin+. Simultaneously, the transformer capacitance (Cxfmr) and the output capa ...
Harmonic Distortion of the AC Power Line Whitepaper
... systems, it is important to limit the harmonic voltage distor‑ tion that they can cause. When an industrial adjustable fre‑ quency drive is used in an HVAC application, this important caution is too frequently overlooked. As a result, the entire building’s electrical system may suffer. The key to co ...
... systems, it is important to limit the harmonic voltage distor‑ tion that they can cause. When an industrial adjustable fre‑ quency drive is used in an HVAC application, this important caution is too frequently overlooked. As a result, the entire building’s electrical system may suffer. The key to co ...
CH 4 - Oscillator_updated
... The quartz crystal is made of silicon oxide (SiO2) and exhibits a property called the piezoelectric ...
... The quartz crystal is made of silicon oxide (SiO2) and exhibits a property called the piezoelectric ...
MAX2690 Low-Noise, 2.5GHz Downconverter Mixer _______________General Description
... The IFOUT+ and IFOUT- pins form the MAX2690’s differential open-collector IF output. The IF output is coupled to the load using shunt inductors to VCC and series capacitors to the load. Most applications use a resistive termination of 500Ω (typical) resistors in parallel with the pull-up inductors t ...
... The IFOUT+ and IFOUT- pins form the MAX2690’s differential open-collector IF output. The IF output is coupled to the load using shunt inductors to VCC and series capacitors to the load. Most applications use a resistive termination of 500Ω (typical) resistors in parallel with the pull-up inductors t ...
EP4301856861
... It has been outlined and illustrated that the single-phase matrix converter can be conceived designed and realized by suitable switching schemes, where IGBTs are used for the main power switching device. When fed from the mains at constant frequency and amplitude the converter is capable of synthesi ...
... It has been outlined and illustrated that the single-phase matrix converter can be conceived designed and realized by suitable switching schemes, where IGBTs are used for the main power switching device. When fed from the mains at constant frequency and amplitude the converter is capable of synthesi ...
Minimum Reactive Power Filter Design for High - PPGEE
... In many works, passive sinusoidal filters come out as good alternative to reduce the system harmonic content. The inherently low switching frequency of high power converters, limited from about 500 to 1000 Hz, complicates filter design, which generally results in large filter elements. Besides, due ...
... In many works, passive sinusoidal filters come out as good alternative to reduce the system harmonic content. The inherently low switching frequency of high power converters, limited from about 500 to 1000 Hz, complicates filter design, which generally results in large filter elements. Besides, due ...
Utility frequency
The utility frequency, (power) line frequency (American English) or mains frequency (British English) is the frequency of the oscillations of alternating current (AC) in an electric power grid transmitted from a power plant to the end-user. In large parts of the world this is 50 Hz, although in the Americas and parts of Asia it is typically 60 Hz. Current usage by country or region is given in the list of mains power around the world.During the development of commercial electric power systems in the late 19th and early 20th centuries, many different frequencies (and voltages) had been used. Large investment in equipment at one frequency made standardization a slow process. However, as of the turn of the 21st century, places that now use the 50 Hz frequency tend to use 220–240 V, and those that now use 60 Hz tend to use 100–127 V. Both frequencies coexist today (Japan uses both) with no great technical reason to prefer one over the other and no apparent desire for complete worldwide standardization.Unless specified by the manufacturer to operate on both 50 and 60 Hz, appliances may not operate efficiently or even safely if used on anything other than the intended frequency.