Reducing the motor Derating and Torque Pulsation of Induction
... frequency is sufficiently large, speed fluctuations are sufficiently low because of the motor inertia. When the fundamental frequency and the motor speed are low, large fluctuations in motor speed are obtained producing a jerky or stepped motion[7]. The amplitude of the torque pulsations depends on ...
... frequency is sufficiently large, speed fluctuations are sufficiently low because of the motor inertia. When the fundamental frequency and the motor speed are low, large fluctuations in motor speed are obtained producing a jerky or stepped motion[7]. The amplitude of the torque pulsations depends on ...
LT1011/LT1011A - Voltage Comparator
... Oscillation problems in comparators are nearly always caused by stray capacitance between the output and inputs or between the output and other sensitive pins on the comparator. This is especially true with high gain bandwidth comparators like the LT1011, which are designed for fast switching with m ...
... Oscillation problems in comparators are nearly always caused by stray capacitance between the output and inputs or between the output and other sensitive pins on the comparator. This is especially true with high gain bandwidth comparators like the LT1011, which are designed for fast switching with m ...
Ahmed EL-SANABARY Ahmed E. KALAS
... which the point P is located, ii) then using the small vector analogy in the virtual two-level geometry; the on-times for this triangle can be calculated, iii) For optimal switching sequence, voltage vectors should be chosen to decrease the number of switching when transferring from states to anothe ...
... which the point P is located, ii) then using the small vector analogy in the virtual two-level geometry; the on-times for this triangle can be calculated, iii) For optimal switching sequence, voltage vectors should be chosen to decrease the number of switching when transferring from states to anothe ...
zener diode - WordPress.com
... Unlike LED’s, photodiodes receive light rather than produce light. The photodiode varies it’s current in response to the amount of light that strikes it. It is placed in the circuit in reverse bias. As with most diodes, no current flows when in reverse bias, but when light strikes the exposed juncti ...
... Unlike LED’s, photodiodes receive light rather than produce light. The photodiode varies it’s current in response to the amount of light that strikes it. It is placed in the circuit in reverse bias. As with most diodes, no current flows when in reverse bias, but when light strikes the exposed juncti ...
MAX15091/MAX15091A Evaluate: MAX15091/MAX15091A Evaluation Kits General Description
... The EV kit provides an option to configure the undervoltage-lockout threshold. The undervoltage-lockout threshold for the device is configured by the IN voltage level divided by R1 and (R2 + R3) at the UV pin. By default, the undervoltage-lockout threshold is set to 10.8V. ...
... The EV kit provides an option to configure the undervoltage-lockout threshold. The undervoltage-lockout threshold for the device is configured by the IN voltage level divided by R1 and (R2 + R3) at the UV pin. By default, the undervoltage-lockout threshold is set to 10.8V. ...
D2-02-14
... 4、The characteristic of 750kV The MCR nonlinear impedance limit the temperature-rise test. If we can guarantee MCR impedance range is limited, the inductive reactive power should be always higher than the capacitive reactive power, which can make the temperature-rise test carried out smoothly. Ther ...
... 4、The characteristic of 750kV The MCR nonlinear impedance limit the temperature-rise test. If we can guarantee MCR impedance range is limited, the inductive reactive power should be always higher than the capacitive reactive power, which can make the temperature-rise test carried out smoothly. Ther ...
General description
... It is recommended to let flow at least 500µA in the input PMOS to reduce series noise by increasing the PMOS gm. That means Vbiasi_pa should be connected to the Vdd with a resistor smaller than 10kΩ (typ. 6.7kΩ for Ids=500µA or 3.3 kΩ for Ids=1mA).A compromise have to be done at this point by the de ...
... It is recommended to let flow at least 500µA in the input PMOS to reduce series noise by increasing the PMOS gm. That means Vbiasi_pa should be connected to the Vdd with a resistor smaller than 10kΩ (typ. 6.7kΩ for Ids=500µA or 3.3 kΩ for Ids=1mA).A compromise have to be done at this point by the de ...
LT6105 Precision, Extended Input Range Current Sense Amplifi er FEATURES
... amplifier with a very wide input common mode range. The LT6105 monitors unidirectional current via the voltage across an external sense resistor. The input common mode range extends from –0.3V to 44V, with respect to the negative supply voltage (V –). This allows the LT6105 to operate as a high side ...
... amplifier with a very wide input common mode range. The LT6105 monitors unidirectional current via the voltage across an external sense resistor. The input common mode range extends from –0.3V to 44V, with respect to the negative supply voltage (V –). This allows the LT6105 to operate as a high side ...
Efficient Adaptive Switch Design for Charge pumps in Micro
... directly related to the size of the switches. For small switches, the loss is high due to high conduction loss and for big switches the loss is again high because of high switching power loss. There will be an optimum value of the switch size for minimal loss that results in maximum harvested power. ...
... directly related to the size of the switches. For small switches, the loss is high due to high conduction loss and for big switches the loss is again high because of high switching power loss. There will be an optimum value of the switch size for minimal loss that results in maximum harvested power. ...
SN751701 数据资料 dataSheet 下载
... for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes. Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (Ro ...
... for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes. Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (Ro ...
16510 – Interior Luminaires - The University of Texas at Austin
... power densities a minimum of 25% below the values allowed in the current ASHRAE 90.1 standard. For fluorescent lighting systems in new construction (or renovations with fixture replacements) and with typical ceiling heights of approximately 9 feet, this can be accomplished by using light colored wal ...
... power densities a minimum of 25% below the values allowed in the current ASHRAE 90.1 standard. For fluorescent lighting systems in new construction (or renovations with fixture replacements) and with typical ceiling heights of approximately 9 feet, this can be accomplished by using light colored wal ...
KSA473 PNP Epitaxial Silicon Transistor KSA473 — PNP Epit axial Silicon
... EXPRESS WRITTEN APPROVAL OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body or (b) support or sustain life, and (c) whose failure to perform when properly used in accordance with ...
... EXPRESS WRITTEN APPROVAL OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body or (b) support or sustain life, and (c) whose failure to perform when properly used in accordance with ...
MAX1845 Dual, High-Efficiency, Step-Down Controller with Accurate Current Limit General Description
... Note 2: When the inductor is in continuous conduction, the output voltage will have a DC regulation level higher than the error comparator threshold by 50% of the output voltage ripple. In discontinuous conduction (SKIP = AGND, light load), the output voltage will have a DC regulation higher than th ...
... Note 2: When the inductor is in continuous conduction, the output voltage will have a DC regulation level higher than the error comparator threshold by 50% of the output voltage ripple. In discontinuous conduction (SKIP = AGND, light load), the output voltage will have a DC regulation higher than th ...
Analysis of the Occurrence of a Three-Phase Short-Circuit
... The three-phase short -circuit on the 500kV Jaguara-Nova Ponte transmission line occurred on March 8, 1999, at 4:40 PM. Fig. 2 presents the waveform of the three-phase fault, obtained through the DFR at Nova Ponte substation. The short-circuit lasted for approximately 45 ms and the voltage reached 4 ...
... The three-phase short -circuit on the 500kV Jaguara-Nova Ponte transmission line occurred on March 8, 1999, at 4:40 PM. Fig. 2 presents the waveform of the three-phase fault, obtained through the DFR at Nova Ponte substation. The short-circuit lasted for approximately 45 ms and the voltage reached 4 ...
Simple Circuits 6.0
... voltage probe, respectively. The signals generated by these sensors are small and will be amplified by a dual channel amplifier. The two amplified signals pass from the amplifier to a general purpose data acquisition control box. The control box interfaces with the computer and software for controll ...
... voltage probe, respectively. The signals generated by these sensors are small and will be amplified by a dual channel amplifier. The two amplified signals pass from the amplifier to a general purpose data acquisition control box. The control box interfaces with the computer and software for controll ...
Synchronous operation of five-phase converters in linear modulation
... presented in Figs. 9-10, is characterized by the fractional ratio between the switching frequency and fundamental frequency, equal to 1500/40=37.5, but the phase-to-neutral voltage has quarter-wave symmetry in this control mode too. During synthesis of algorithms of synchronized PWM for five-phase i ...
... presented in Figs. 9-10, is characterized by the fractional ratio between the switching frequency and fundamental frequency, equal to 1500/40=37.5, but the phase-to-neutral voltage has quarter-wave symmetry in this control mode too. During synthesis of algorithms of synchronized PWM for five-phase i ...
Sensing Elements for Current Measurements
... Ideally, a four terminal current sense resistor would be used as the sensing element. Four terminal sensor resistors can be hard to find for specific values and sizes. Often a two terminal sense resistor is designed into the application. Sense lines are high impedance by definition. The connection p ...
... Ideally, a four terminal current sense resistor would be used as the sensing element. Four terminal sensor resistors can be hard to find for specific values and sizes. Often a two terminal sense resistor is designed into the application. Sense lines are high impedance by definition. The connection p ...
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.