Report 2015
... Source THDi determined by the type of real load section 2, and is approximately 20%. Active filter reduces the level of THDi to 2-3% (fig.8). The current in the neutral conductor depends on the imbalance of the first harmonic and on the presence of harmonics especially that are multiples of three. F ...
... Source THDi determined by the type of real load section 2, and is approximately 20%. Active filter reduces the level of THDi to 2-3% (fig.8). The current in the neutral conductor depends on the imbalance of the first harmonic and on the presence of harmonics especially that are multiples of three. F ...
Constant-Voltage, Constant-Current Controller With Primary
... The UCC28720 is a flyback power supply controller which provides accurate voltage and constant current regulation with primary-side feedback, eliminating the need for opto-coupler feedback circuits. The controller operates in discontinuous conduction mode with valley-switching to minimize switching ...
... The UCC28720 is a flyback power supply controller which provides accurate voltage and constant current regulation with primary-side feedback, eliminating the need for opto-coupler feedback circuits. The controller operates in discontinuous conduction mode with valley-switching to minimize switching ...
Shedding Light on HID Ballast Control
... they are efficient and have a high-brightness output. HID metal-halide lamps are typically five times as efficient as incandescent lamps and last 20 times longer. In the case of sodium vapor, they are twice as efficient as normal fluorescent bulbs. HID lamps produce light using a technique similar to tha ...
... they are efficient and have a high-brightness output. HID metal-halide lamps are typically five times as efficient as incandescent lamps and last 20 times longer. In the case of sodium vapor, they are twice as efficient as normal fluorescent bulbs. HID lamps produce light using a technique similar to tha ...
103_lab05
... Since , 2, and 2 2 are constants, we may solve for the constants in the previous equation and obtain: Vrms = 1.1107Vav and Vav = 0.9 Vrms The oscilloscope is used to measure the amplitude of a voltage, displayed on the vertical axis, against time, which is displayed on the horizontal axis. The vert ...
... Since , 2, and 2 2 are constants, we may solve for the constants in the previous equation and obtain: Vrms = 1.1107Vav and Vav = 0.9 Vrms The oscilloscope is used to measure the amplitude of a voltage, displayed on the vertical axis, against time, which is displayed on the horizontal axis. The vert ...
Multi-Cell Lithium Ion Battery Management System
... and monitor multi-cell series lithium ion batteries for an electric vehicle using AC to DC converters and monitoring microcontrollers The approach to accomplish this task is twofold: develop a charging system and develop a battery management system. In order to focus more on the battery management s ...
... and monitor multi-cell series lithium ion batteries for an electric vehicle using AC to DC converters and monitoring microcontrollers The approach to accomplish this task is twofold: develop a charging system and develop a battery management system. In order to focus more on the battery management s ...
UC3851 数据资料 dataSheet 下载
... and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete. All products are sold subject to TI’s te ...
... and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete. All products are sold subject to TI’s te ...
AP1 FR Review Probs
... determine which gets more current from the same battery, the total resistance of each circuit must be determined. In the series circuit, the resistances are added together for a total current of 2R. In the parallel circuit, the resistance is the reciprocal of the sum of the reciprocals of each ...
... determine which gets more current from the same battery, the total resistance of each circuit must be determined. In the series circuit, the resistances are added together for a total current of 2R. In the parallel circuit, the resistance is the reciprocal of the sum of the reciprocals of each ...
The high power active filter system for harmonic compensation of
... The strength points of multi carrier types are as follows: it is easy and simple to control, the carry which is one less than the degree of voltage level is required and each carry signal produces switching waveform ...
... The strength points of multi carrier types are as follows: it is easy and simple to control, the carry which is one less than the degree of voltage level is required and each carry signal produces switching waveform ...
Amp Enable Outputs
... (see the Hardware Reference manual). The current flow to zero volts must be broken to put the flag in its 1 state; no external pull-up resistor is required. For an electronic switch, usually an open-collector output is used. To use a power supply other than the analog +15V from pin 59 on JMACH1, or ...
... (see the Hardware Reference manual). The current flow to zero volts must be broken to put the flag in its 1 state; no external pull-up resistor is required. For an electronic switch, usually an open-collector output is used. To use a power supply other than the analog +15V from pin 59 on JMACH1, or ...
IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE)
... actions over various devices material. But, instead of role of transformer in case of inverter voltage step up or step down, the HBI supports to reduce heat generation and helps to maintain “carbon neutral” strategy. This might not reduce large percentage of carbon foot printing but this is also sig ...
... actions over various devices material. But, instead of role of transformer in case of inverter voltage step up or step down, the HBI supports to reduce heat generation and helps to maintain “carbon neutral” strategy. This might not reduce large percentage of carbon foot printing but this is also sig ...
CosmicRay Instrumentation in the First U. S. Earth Satellite
... emitter test circuit consisting of a lO-kohm collector resistor in series with a microammeter and twenty volt battery, and a lO-kohm base resistor in series with a 0.5 v reverse biasing battery, it was required that the collector current be less than 0.1 p.a. It was also required that the beta be gr ...
... emitter test circuit consisting of a lO-kohm collector resistor in series with a microammeter and twenty volt battery, and a lO-kohm base resistor in series with a 0.5 v reverse biasing battery, it was required that the collector current be less than 0.1 p.a. It was also required that the beta be gr ...
The development of power electronics in Europe
... voltages and frequencies, so that one need only a few valve sizes. For less power glass bulb rectifiers were produced. Devices with iron vessel became usual for rectifiers for more power although it needed water for cooling and pumps for vacuum maintenance. However such devices had been robust, shor ...
... voltages and frequencies, so that one need only a few valve sizes. For less power glass bulb rectifiers were produced. Devices with iron vessel became usual for rectifiers for more power although it needed water for cooling and pumps for vacuum maintenance. However such devices had been robust, shor ...
MAX1630–MAX1635 Multi-Output, Low-Noise Power-Supply Controllers for Notebook Computers ________________General Description
... Note 2: High duty-factor operation supports low input-to-output differential voltages, and is achieved at a lowered operating frequency (see Overload and Dropout Operation section). Note 3: MAX1630/MAX1632/MAX1633/MAX1635 only. Note 4: Off mode for the 12V linear regulator occurs when the SMPS that ...
... Note 2: High duty-factor operation supports low input-to-output differential voltages, and is achieved at a lowered operating frequency (see Overload and Dropout Operation section). Note 3: MAX1630/MAX1632/MAX1633/MAX1635 only. Note 4: Off mode for the 12V linear regulator occurs when the SMPS that ...
When should inverter-duty motors be specified?
... Additionally, the harmonics in a PWM (pulse-width modulation) wave form can lower the motor’s efficiency when compared to operation on a sine wave. Additional heating occurs in the motor, which may also lower the amount of torque provided at low speed. ...
... Additionally, the harmonics in a PWM (pulse-width modulation) wave form can lower the motor’s efficiency when compared to operation on a sine wave. Additional heating occurs in the motor, which may also lower the amount of torque provided at low speed. ...
FSQ0565RS/RQ Green-Mode Fairchild Power Switch (FPS™) for Quasi-Resonant Operation -
... lower EMI and higher power conversion efficiency than a conventional hard-switched converter with a fixed switching frequency. The FSQ-series is an integrated Pulse-Width Modulation (PWM) controller and SenseFET specifically designed for quasi-resonant operation and Alternating Valley Switching (AVS ...
... lower EMI and higher power conversion efficiency than a conventional hard-switched converter with a fixed switching frequency. The FSQ-series is an integrated Pulse-Width Modulation (PWM) controller and SenseFET specifically designed for quasi-resonant operation and Alternating Valley Switching (AVS ...
Buck converter
A buck converter is a voltage step down and current step up converter.The simplest way to reduce the voltage of a DC supply is to use a linear regulator (such as a 7805), but linear regulators waste energy as they operate by dissipating excess power as heat. Buck converters, on the other hand, can be remarkably efficient (95% or higher for integrated circuits), making them useful for tasks such as converting the main voltage in a computer (12V in a desktop, 12-24V in a laptop) down to the 0.8-1.8V needed by the processor.