Aalborg Universitet Wang, Xiongfei; Blaabjerg, Frede; Loh, Poh Chiang; Pang, Ying
... harmonics, which are mainly low-order (5th and 7th) [4]-[6], or caused by the interactions among current control loops of grid converters, which is typically in a high-frequency range (600 Hz - 2 kHz) [7]-[9], [23]-[25]. The latter phenomenon is also known as the harmonic instability [7], or electri ...
... harmonics, which are mainly low-order (5th and 7th) [4]-[6], or caused by the interactions among current control loops of grid converters, which is typically in a high-frequency range (600 Hz - 2 kHz) [7]-[9], [23]-[25]. The latter phenomenon is also known as the harmonic instability [7], or electri ...
Analysis of high frequency harmonics injected by wind turbines in a
... distribution transformer failures. High frequency noise may under certain circumstances cause cable insulation damage and ultimately cable failure. ...
... distribution transformer failures. High frequency noise may under certain circumstances cause cable insulation damage and ultimately cable failure. ...
Installation manual - Harrison Hydra-Gen
... All wiring must meet applicable local, state, and federal electrical codes. Accordingly, have a qualified electrician install and inspect the wiring. Mount switches and controls securely to prevent damage from vibration and road shock. All switches must be vibration proof to prevent accidental openi ...
... All wiring must meet applicable local, state, and federal electrical codes. Accordingly, have a qualified electrician install and inspect the wiring. Mount switches and controls securely to prevent damage from vibration and road shock. All switches must be vibration proof to prevent accidental openi ...
TPA2008D2 数据资料 dataSheet 下载
... The TPA2008D2 is a third generation 5-V class-D amplifier from Texas Instruments. Improvements to previous generation devices include: dc volume control, lower supply current, lower noise floor, higher efficiency, smaller packaging, and fewer external components. Most notably, a new filter-free clas ...
... The TPA2008D2 is a third generation 5-V class-D amplifier from Texas Instruments. Improvements to previous generation devices include: dc volume control, lower supply current, lower noise floor, higher efficiency, smaller packaging, and fewer external components. Most notably, a new filter-free clas ...
table of contents
... Since a dipole is a balanced antenna, it is a good idea to put a balun at the feedpoint. The balun can be as simple as several turns of coax several inches in diameter, or a complicated affair with many windings on a ferromagnetic core. The height of the dipole, as well as it's surroundings, influen ...
... Since a dipole is a balanced antenna, it is a good idea to put a balun at the feedpoint. The balun can be as simple as several turns of coax several inches in diameter, or a complicated affair with many windings on a ferromagnetic core. The height of the dipole, as well as it's surroundings, influen ...
Broadband Doherty Power Amplifier via Real
... and maximize the bandwidth efficiency in the provided limited frequency band [1]. However, their associated high peak-toaverage power ratio constrains the power amplifiers working at a sufficient back-off power level to ensure the acceptable linearity, which is at the expense of efficiency [2]. The ...
... and maximize the bandwidth efficiency in the provided limited frequency band [1]. However, their associated high peak-toaverage power ratio constrains the power amplifiers working at a sufficient back-off power level to ensure the acceptable linearity, which is at the expense of efficiency [2]. The ...
Schneider Altivar ATV12 Quick Start Guide
... - Measure the voltage of the DC bus between the PA/+ and PC/- terminals to ensure that the voltage is less than 42 Vdc. - If the DC bus capacitors do not discharge completely, contact your local Schneider Electric representative. Do not repair or operate the drive • Install and close all covers befo ...
... - Measure the voltage of the DC bus between the PA/+ and PC/- terminals to ensure that the voltage is less than 42 Vdc. - If the DC bus capacitors do not discharge completely, contact your local Schneider Electric representative. Do not repair or operate the drive • Install and close all covers befo ...
Synchronous speed
... prevented from doing so by the starting arrangements.[18] Once the motor is in operation, the speed of the motor is dependent only on the supply frequency. When the motor load is increased beyond the breakdown load, the motor falls out of synchronization and the field winding no longer follows the r ...
... prevented from doing so by the starting arrangements.[18] Once the motor is in operation, the speed of the motor is dependent only on the supply frequency. When the motor load is increased beyond the breakdown load, the motor falls out of synchronization and the field winding no longer follows the r ...
Dynamic Maximum Power Point Tracking of
... — uses array current and voltage ripple, which must already be present if a switching converter is used, to determine gradient information; no artificial perturbation is required; — achieves convergence at a rate limited by switching period and the controller gain; — does not rely on assumptions or ...
... — uses array current and voltage ripple, which must already be present if a switching converter is used, to determine gradient information; no artificial perturbation is required; — achieves convergence at a rate limited by switching period and the controller gain; — does not rely on assumptions or ...
ANLPS300: How to Power GSM/GPRS/EDGE/3G/HSPA M2M Modems General Description
... component choice. If fixed frequency PWM is used, then it must feature large loop bandwidth for faster load regulation without showing instabilities like oscillations or significant overshoots/ undershoots. ...
... component choice. If fixed frequency PWM is used, then it must feature large loop bandwidth for faster load regulation without showing instabilities like oscillations or significant overshoots/ undershoots. ...
LTC4402-1/LTC4402-2 - Multiband RF Power Controllers for EDGE/TDMA.
... Enable: When SHDN is asserted high the part will automatically calibrate out all offsets. This takes about 9µs and is controlled by an internal delay circuit. After 9µs VPCA or VPCB will step up to the starting voltage of 450mV. The user can then apply the ramp signal. The user should wait at least ...
... Enable: When SHDN is asserted high the part will automatically calibrate out all offsets. This takes about 9µs and is controlled by an internal delay circuit. After 9µs VPCA or VPCB will step up to the starting voltage of 450mV. The user can then apply the ramp signal. The user should wait at least ...
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.