transformer
... Manufacturing and Quality: 1. How to ensure that transformer after manufacturing has good IR value and minimum moisture? 2. How to ascertain that core material used is genuine? 3. Should there be one-to-one match between material used in type tested job and later supplied during manufacturing? 4. W ...
... Manufacturing and Quality: 1. How to ensure that transformer after manufacturing has good IR value and minimum moisture? 2. How to ascertain that core material used is genuine? 3. Should there be one-to-one match between material used in type tested job and later supplied during manufacturing? 4. W ...
A.D. Sagneri, D.I. Anderson, and D.J. Perreault, “Optimization of Integrated Transistors for Very High Frequency dc-dc Converters,” IEEE Transactions on Power Electronics , Vol. 28, No. 7, pp. 3614-3626, July 2013.
... icond,RM S , is independent of frequency as is the on-state resistance, RDS−on . Therefore, even as frequency is scaled into the VHF regime, conduction loss remains significant and sets the minimum device area necessary to process a given amount of power. In contrast to conduction loss, the frequenc ...
... icond,RM S , is independent of frequency as is the on-state resistance, RDS−on . Therefore, even as frequency is scaled into the VHF regime, conduction loss remains significant and sets the minimum device area necessary to process a given amount of power. In contrast to conduction loss, the frequenc ...
Improved Algorithms of Direct Torque Control Method
... controllers. The other method involves improving the classical conception of the nonlinear (hysteresis) torque and flux controllers by an introduction of additional modulation algorithms at sampling time tp [8, 9, 10]. For this purpose additional triangular signals modulating the torque and flux err ...
... controllers. The other method involves improving the classical conception of the nonlinear (hysteresis) torque and flux controllers by an introduction of additional modulation algorithms at sampling time tp [8, 9, 10]. For this purpose additional triangular signals modulating the torque and flux err ...
TEM Transmission Lines
... In the special case d = W, Zo equals the characteristic impedance ηo of free space, 377 ohms. Usually W >> d in order to minimize fringing fields, yielding Zo << 377. Since the two parallel plates can be perfectly conducting and lossless, the physical significance of Zo ohms may be unclear. Zo is de ...
... In the special case d = W, Zo equals the characteristic impedance ηo of free space, 377 ohms. Usually W >> d in order to minimize fringing fields, yielding Zo << 377. Since the two parallel plates can be perfectly conducting and lossless, the physical significance of Zo ohms may be unclear. Zo is de ...
Datasheet
... System Magic uses a smart probe connected to a PC or a notebook or a PDA. The most important part of the instrument is its software, which makes it different from all the other so far produced instruments. The main strategy while developing this system was to create an all-purpose measuring instrume ...
... System Magic uses a smart probe connected to a PC or a notebook or a PDA. The most important part of the instrument is its software, which makes it different from all the other so far produced instruments. The main strategy while developing this system was to create an all-purpose measuring instrume ...
Generator Power Control
... Single and Three Phase CTs (current transformers) Inputs CTs are used to monitor generator and utility current. 0 to 5 amps; 50/60 Hz ...
... Single and Three Phase CTs (current transformers) Inputs CTs are used to monitor generator and utility current. 0 to 5 amps; 50/60 Hz ...
The singing arc: the oldest memristor?
... last to be published in the last two months of 1926. Van der Pol gave the explanation of Gérard-Lescuyer’s electrodynamical paradox by showing that the relation between the potential difference v across the dynamo’s terminals and the current intensity i through it may be represented by a nonlinear ...
... last to be published in the last two months of 1926. Van der Pol gave the explanation of Gérard-Lescuyer’s electrodynamical paradox by showing that the relation between the potential difference v across the dynamo’s terminals and the current intensity i through it may be represented by a nonlinear ...
PCA1462U
... Measures the induced current; during a maximum time tM2 all switches are open until a change is sensed by one of the level detectors (L1, L2). The motor is short-circuited to VDD. Depending on the direction of the interrupted current: • The current flows through diodes D3 and D2, causing the voltage ...
... Measures the induced current; during a maximum time tM2 all switches are open until a change is sensed by one of the level detectors (L1, L2). The motor is short-circuited to VDD. Depending on the direction of the interrupted current: • The current flows through diodes D3 and D2, causing the voltage ...
short-to-voltage
... FIGURE 4-9 To calculate one unit of electricity when the other two are known, simply use your finger and cover the unit you do not know. For example, if both voltage (E) and resistance (R) are known, cover the letter/(amperes). Notice that the letter E is above the letter R, so divide the resistor’s ...
... FIGURE 4-9 To calculate one unit of electricity when the other two are known, simply use your finger and cover the unit you do not know. For example, if both voltage (E) and resistance (R) are known, cover the letter/(amperes). Notice that the letter E is above the letter R, so divide the resistor’s ...
Introduction to Alternating Current, Voltage and Power
... amount of heat in a resistive circuit) • It is sometimes called the resistive DC equivalent value • It takes into account that the AC source passes through zero twice in each cycle where it does no work at all Vrms = 0.707Vp Irms = 0.707Ip Vp = 1.414Vrms Ip = 1.414Irms ...
... amount of heat in a resistive circuit) • It is sometimes called the resistive DC equivalent value • It takes into account that the AC source passes through zero twice in each cycle where it does no work at all Vrms = 0.707Vp Irms = 0.707Ip Vp = 1.414Vrms Ip = 1.414Irms ...
2012 understanding lcd t-con training presentation - V4.0
... columns, because a pixel is comprised on a Red, Green and Blue cell. So there will be 5760 individual cells in rows across the screen. To turn these cells on and off, the panel will use vertical y a small board located inside the p panel. In this wayy we can turn address lines or electrodes driven b ...
... columns, because a pixel is comprised on a Red, Green and Blue cell. So there will be 5760 individual cells in rows across the screen. To turn these cells on and off, the panel will use vertical y a small board located inside the p panel. In this wayy we can turn address lines or electrodes driven b ...
M. Chen, K.K. Afridi and D.J. Perreault, “A Multilevel Energy Buffer and Voltage Modulator for Grid-Interfaced Micro-Inverters,” 2013 IEEE Energy Conversion Congress and Exposition , pp. 3070-3080, September 2013.
... [1]–[8]. Two important considerations in the design of microinverters are converter efficiency and size. The size of the micro-inverter can be reduced by increasing its switching frequency. However, to maintain or enhance efficiency at the higher switching frequencies, advanced topologies and contro ...
... [1]–[8]. Two important considerations in the design of microinverters are converter efficiency and size. The size of the micro-inverter can be reduced by increasing its switching frequency. However, to maintain or enhance efficiency at the higher switching frequencies, advanced topologies and contro ...
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.