Cascaded Current–Voltage Control to Improve the Power Quality for
... grid-connected or vice versa [8]. It is advantageous to operate inverters as voltage sources because there is no need to change the controller when the operation mode is changed. A parallel control structure consisting of an output voltage controller and a grid current controller was proposed in [8] ...
... grid-connected or vice versa [8]. It is advantageous to operate inverters as voltage sources because there is no need to change the controller when the operation mode is changed. A parallel control structure consisting of an output voltage controller and a grid current controller was proposed in [8] ...
Bipolar High-voltage Differential Interface for
... 2.1 Accommodating a dual polarity (bipolar), high-voltage input voltage The two-resistor voltage divider provides a straightforward means to reduce a high-voltage before it is applied to the comparator input. However, there may be a need to compare levels that are very close to zero volts, or even h ...
... 2.1 Accommodating a dual polarity (bipolar), high-voltage input voltage The two-resistor voltage divider provides a straightforward means to reduce a high-voltage before it is applied to the comparator input. However, there may be a need to compare levels that are very close to zero volts, or even h ...
Auto-Transformer
... line voltages and line currents are out of phase with each other by 30o. Because of this 30o shift, it is impossible to parallel such a bank with a - or Y-Y bank of transformers even though the voltage ratios are correctly adjusted. The ratio of secondary to primary voltage is 3 time the transfor ...
... line voltages and line currents are out of phase with each other by 30o. Because of this 30o shift, it is impossible to parallel such a bank with a - or Y-Y bank of transformers even though the voltage ratios are correctly adjusted. The ratio of secondary to primary voltage is 3 time the transfor ...
Closed and Open Loop Gain
... If the loop is broken, then we say the loop is “open”. The gain (vo vi ) for the open loop case is referred to as the open-loop gain. ...
... If the loop is broken, then we say the loop is “open”. The gain (vo vi ) for the open loop case is referred to as the open-loop gain. ...
ABB Transformers - cablejoints.co.uk
... Current and Voltage instrument transformers are used: to convert large currents or voltage in the primary circuit to an appropriate level for secondary circuit equipment (relays and meters) - to insulate primary and secondary circuit from each other to protect the secondary equipment from the harmfu ...
... Current and Voltage instrument transformers are used: to convert large currents or voltage in the primary circuit to an appropriate level for secondary circuit equipment (relays and meters) - to insulate primary and secondary circuit from each other to protect the secondary equipment from the harmfu ...
AD8318 1 MHz to 8 GHz, 70 dB Logarithmic Detector/Controller
... 6 GHz and provides useful operation to 8 GHz. The input range is typically 60 dB (re: 50 Ω) with error less than ±1 dB. The AD8318 has a 10 ns response time that enables RF burst detection to beyond 45 MHz. The device provides unprecedented logarithmic intercept stability vs. ambient temperature con ...
... 6 GHz and provides useful operation to 8 GHz. The input range is typically 60 dB (re: 50 Ω) with error less than ±1 dB. The AD8318 has a 10 ns response time that enables RF burst detection to beyond 45 MHz. The device provides unprecedented logarithmic intercept stability vs. ambient temperature con ...
A New Topology for Multilevel Current Source Converters Ebrahim Babaei Seyed Hossein Hosseini
... voltage source inputs and an inductive load. Any single output can be switched to one of three different voltage levels (the voltages of the three input phases) and similarly, any input can be switched to one of four current levels (including zero). In this example, both the input and the output nod ...
... voltage source inputs and an inductive load. Any single output can be switched to one of three different voltage levels (the voltages of the three input phases) and similarly, any input can be switched to one of four current levels (including zero). In this example, both the input and the output nod ...
EE6503-Power Electronics
... BTL 3 10. (i) A three phase full converter charges a battery from a three –phase supply of 230 V ,50 Hz .The battery is 200 V and its internal resistance is 0.5 Ω .On account of inductance connected in series with the battery ,charging current is constant at 20 A. Compute firing angle delay and supp ...
... BTL 3 10. (i) A three phase full converter charges a battery from a three –phase supply of 230 V ,50 Hz .The battery is 200 V and its internal resistance is 0.5 Ω .On account of inductance connected in series with the battery ,charging current is constant at 20 A. Compute firing angle delay and supp ...
Modelling and Simulation of Step-Up and Step
... of the output signal and thus prevent numerical oscillations. The time constant Tδ is about 0.005s. The filtered differentiator can also introduce the initial value of phase shift depending on other initialization values of the model. The input quantities of step-up transformer (IPnet, IQnet) and th ...
... of the output signal and thus prevent numerical oscillations. The time constant Tδ is about 0.005s. The filtered differentiator can also introduce the initial value of phase shift depending on other initialization values of the model. The input quantities of step-up transformer (IPnet, IQnet) and th ...
2 MODULATION OF A WAVE FRONT WITH A LCSLM
... Berreman’s method can be used. In the case of the field-on state it is not possible to determine an analytical expression for the Jones matrix of the LCSLM. Thus, the problem can only be addressed numerically. First, the values χ=χ(z) and θ=θ(z) are calculated for different values of applied voltage ...
... Berreman’s method can be used. In the case of the field-on state it is not possible to determine an analytical expression for the Jones matrix of the LCSLM. Thus, the problem can only be addressed numerically. First, the values χ=χ(z) and θ=θ(z) are calculated for different values of applied voltage ...
CC2541-Q1 - Texas Instruments
... Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under Recommended Operating Conditions is not implied. Exposure to absol ...
... Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under Recommended Operating Conditions is not implied. Exposure to absol ...
June 2008 DRAFT - submitted to JSSC for review.
... The rapid increase in energy consumption of large digital circuits has been predominantly due to an increase in total gate capacitance and an increase in operating frequency [1]. As a result, a large fraction of the total energy budget is used by the high-frequency clock network. While the clock ene ...
... The rapid increase in energy consumption of large digital circuits has been predominantly due to an increase in total gate capacitance and an increase in operating frequency [1]. As a result, a large fraction of the total energy budget is used by the high-frequency clock network. While the clock ene ...
electronics 1 - Computer Engineering 2009
... electronic circuits this is the 0V (zero volts) of the power supply, but for mains electricity and some radio circuits it really means the earth. It is also known as ground. ...
... electronic circuits this is the 0V (zero volts) of the power supply, but for mains electricity and some radio circuits it really means the earth. It is also known as ground. ...
General Specifications MODEL UT320 Digital Indicating Controller
... the retransmission output/15V DC sensor power supply cannot be used. Current output Number of output points: 1 or 2 (2 for heating/cooling), Swiched between voltage pulse output and current output. Output signal: 4 to 20 mA Load resistance: 600 Ω or less Output accuracy: ±0.3% of span Performance in ...
... the retransmission output/15V DC sensor power supply cannot be used. Current output Number of output points: 1 or 2 (2 for heating/cooling), Swiched between voltage pulse output and current output. Output signal: 4 to 20 mA Load resistance: 600 Ω or less Output accuracy: ±0.3% of span Performance in ...
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.