Aalborg Universitet Control Architecture for Parallel-Connected Inverters in Uninterruptible Power Systems
... UPS topologies that are being used and presents the proposed control structure. In order to analyze system stability, a mathematical model is presented and analyzed in Section III. Experimental results are presented in Section IV to prove the proposed control approach feasibility. Finally, conclusio ...
... UPS topologies that are being used and presents the proposed control structure. In order to analyze system stability, a mathematical model is presented and analyzed in Section III. Experimental results are presented in Section IV to prove the proposed control approach feasibility. Finally, conclusio ...
Analytical and Practical Analysis of Switched-Capacitor DC
... provides an ideal dc voltage conversion ratio under no load conditions, and all losses are manifested by voltage drop associated with non-zero load current. Note that losses associated with driving switches are neglected for the present but will be considered in section 4.3. Further, with the model ...
... provides an ideal dc voltage conversion ratio under no load conditions, and all losses are manifested by voltage drop associated with non-zero load current. Note that losses associated with driving switches are neglected for the present but will be considered in section 4.3. Further, with the model ...
clk-Q time - inst.eecs.berkeley.edu - University of California, Berkeley
... Delays in a series of gates • Cascaded gates: ...
... Delays in a series of gates • Cascaded gates: ...
ADM698 数据手册DataSheet 下载
... typ). RESET remains low for a minimum of 140 ms after VCC returns to 5 V. RESET also goes low for a minimum of 140 ms if the watchdog timer is enabled but not serviced within its timeout period. Watchdog Input. WDI is a three level input. If WDI remains either high or low for longer than the watchdo ...
... typ). RESET remains low for a minimum of 140 ms after VCC returns to 5 V. RESET also goes low for a minimum of 140 ms if the watchdog timer is enabled but not serviced within its timeout period. Watchdog Input. WDI is a three level input. If WDI remains either high or low for longer than the watchdo ...
SP385E
... accept TTL or CMOS inputs and output the RS-232 signals with an inverted sense relative to the input logic levels. Typically the RS-232 output voltage swing is ±9V for 5V supply and ±4.2V for 3.3V supply. Even under worst case loading conditions of 3kΩ and 2500pF, the output is guaranteed to be ±5V ...
... accept TTL or CMOS inputs and output the RS-232 signals with an inverted sense relative to the input logic levels. Typically the RS-232 output voltage swing is ±9V for 5V supply and ±4.2V for 3.3V supply. Even under worst case loading conditions of 3kΩ and 2500pF, the output is guaranteed to be ±5V ...
SECTION 265113 * INTERIOR LIGHTING FIXTURES, LAMPS, AND
... Ballast operating within rated voltage and frequency shall tolerate voltage and frequency variations of plus or minus 10% percent without damage to ballast or lamps. ...
... Ballast operating within rated voltage and frequency shall tolerate voltage and frequency variations of plus or minus 10% percent without damage to ballast or lamps. ...
Electrical Safety - HCC Learning Web
... • The heart of most types of thermostats is a bimetal element. • The element get its name from the fact that it uses a bimetal to cause the movement that open and closes a set of contacts. • A bimetal is a combination of two pieces of metal. • The metals are welded together. • Each metal has a diffe ...
... • The heart of most types of thermostats is a bimetal element. • The element get its name from the fact that it uses a bimetal to cause the movement that open and closes a set of contacts. • A bimetal is a combination of two pieces of metal. • The metals are welded together. • Each metal has a diffe ...
TSC2003-Q1 数据资料 dataSheet 下载
... overdriven with an external, low-impedance source between 2 V and VDD. The value of the reference voltage directly sets the input range of the converter. The analog input (X, Y, and Z parallel coordinates, auxiliary inputs, battery voltage, and chip temperature) to the converter is provided via a mu ...
... overdriven with an external, low-impedance source between 2 V and VDD. The value of the reference voltage directly sets the input range of the converter. The analog input (X, Y, and Z parallel coordinates, auxiliary inputs, battery voltage, and chip temperature) to the converter is provided via a mu ...
Electric Circuits
... This type of circuit is also used in real houses. One of the switches is at the top of the stairs, and the other switch is at the bottom of the stairs. What is the advantage of using this circuit to switch a lamp on or off, rather than using a more simple circuit that has only one switch? ...
... This type of circuit is also used in real houses. One of the switches is at the top of the stairs, and the other switch is at the bottom of the stairs. What is the advantage of using this circuit to switch a lamp on or off, rather than using a more simple circuit that has only one switch? ...
Voltage management
... magnetic) ballast is used. Simple magnetic ballasts provide an unregulated supply to the lamp with inductive and resistive impedance. In this arrangement the power consumed is proportional to the supplied voltage. However, lower voltage and power may reduce the light output. Rated light output is ac ...
... magnetic) ballast is used. Simple magnetic ballasts provide an unregulated supply to the lamp with inductive and resistive impedance. In this arrangement the power consumed is proportional to the supplied voltage. However, lower voltage and power may reduce the light output. Rated light output is ac ...
投影片 1 - 國立東華大學光電工程學系
... Z Z nCi (VG VT ) • We can measure VD/ID in the linear range for various MOSFETs having the same width, but different channel lengths, as a function of substrate bias. • Varying the substrate bias changes the VT through the body effect, and therefore the slope of the straight lines that result ...
... Z Z nCi (VG VT ) • We can measure VD/ID in the linear range for various MOSFETs having the same width, but different channel lengths, as a function of substrate bias. • Varying the substrate bias changes the VT through the body effect, and therefore the slope of the straight lines that result ...
magnetizing current effect minimization in current transformers
... – polarization current generating a magnetic flux in the core. The polarization current is responsible for magnetic losses in the core. It is also responsible for errors of the current transformer. There are two types of errors for current transformers: amplitude and phase error. Amplitude error has ...
... – polarization current generating a magnetic flux in the core. The polarization current is responsible for magnetic losses in the core. It is also responsible for errors of the current transformer. There are two types of errors for current transformers: amplitude and phase error. Amplitude error has ...
AD5233 数据手册DataSheet 下载
... RDAC wiper up or down, one step at a time. For logarithmic ±6 dB step changes in wiper settings, the left or right bit shift command can be used to double or halve the RDAC wiper setting. The AD5233 is available in a thin 24-lead TSSOP package. The part is guaranteed to operate over the extended ind ...
... RDAC wiper up or down, one step at a time. For logarithmic ±6 dB step changes in wiper settings, the left or right bit shift command can be used to double or halve the RDAC wiper setting. The AD5233 is available in a thin 24-lead TSSOP package. The part is guaranteed to operate over the extended ind ...
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.