The PWM Control of the Three-phase Induction Motor Ping Wei
... three-phase induction motor. It is by adjusting the pulse width and the pulse duty ratio to regulate the average voltage. The PWM technology [7], accompanied by the development of power electronic devices, has a good development and currently has matured. By using the PWM technique, the inverter out ...
... three-phase induction motor. It is by adjusting the pulse width and the pulse duty ratio to regulate the average voltage. The PWM technology [7], accompanied by the development of power electronic devices, has a good development and currently has matured. By using the PWM technique, the inverter out ...
WACKER - 0007896 Ø 45 mm Internal Vibrator
... Ø (depending on consistency) Vibration frequency Drive engine ...
... Ø (depending on consistency) Vibration frequency Drive engine ...
Varistors TMOV®25S Datasheet
... Peak value of the current, selected by the manufacturer, through the SPD having a current waveshape of 8/20µs where the SPD remains functional after 15 surges. Voltage Protection Rating (VPR) A rating selected from a list of preferred values as given in UL 1449 and assigned to each mode of protectio ...
... Peak value of the current, selected by the manufacturer, through the SPD having a current waveshape of 8/20µs where the SPD remains functional after 15 surges. Voltage Protection Rating (VPR) A rating selected from a list of preferred values as given in UL 1449 and assigned to each mode of protectio ...
impedance mismatches and relections
... When Zc is not equal to Zt—that is, when an impedance mismatch exists between the line and load—a reflection occurs. The reflected and incident waves interact to produce a standing wave. The standing wave’s distribution of voltage and current is a result of the superposition of the two traveling wav ...
... When Zc is not equal to Zt—that is, when an impedance mismatch exists between the line and load—a reflection occurs. The reflected and incident waves interact to produce a standing wave. The standing wave’s distribution of voltage and current is a result of the superposition of the two traveling wav ...
ADXRS150EB ±150°/s Single Chip Rate Gyro Evaluation Board
... Note that the analog supply voltage and charge pump supply voltage (AVCC and PDD) are not connected on the ADXRS150EB and that users must connect these as appropriate to their application. ...
... Note that the analog supply voltage and charge pump supply voltage (AVCC and PDD) are not connected on the ADXRS150EB and that users must connect these as appropriate to their application. ...
ISSCC 2008 / SESSION 12 / HIGH-EFFICIENCY DATA
... DAC. Therefore, it is necessary to set the MSB in between the sampling phase and the first comparison. In the ADC discussed here, this has already been done, saving energy and time. The 10b differential ADC uses bootstrapped NMOS devices to sample the differential input voltage onto 2 identical char ...
... DAC. Therefore, it is necessary to set the MSB in between the sampling phase and the first comparison. In the ADC discussed here, this has already been done, saving energy and time. The 10b differential ADC uses bootstrapped NMOS devices to sample the differential input voltage onto 2 identical char ...
AC Generation – Vocabulary Terms
... The conducting coils that are wound around the armature in which voltage is induced if moved within a magnetic field. Also used to transfer voltage in transformers. ...
... The conducting coils that are wound around the armature in which voltage is induced if moved within a magnetic field. Also used to transfer voltage in transformers. ...
power supply
... the voltage drop in resistor R5 will turn on transistor Q1. This will force more current in the LM-7805 IC. Eventually the LM-7805 IC will overheat turning itself off and thus limiting the circuit at about 2.6A. The first .2A of current is drawn by the LM-7805 IC. The next 3A are drawn by transistor ...
... the voltage drop in resistor R5 will turn on transistor Q1. This will force more current in the LM-7805 IC. Eventually the LM-7805 IC will overheat turning itself off and thus limiting the circuit at about 2.6A. The first .2A of current is drawn by the LM-7805 IC. The next 3A are drawn by transistor ...
Final Presentation
... The variable generator voltage is scaled down to a less than 5V and 40mA signal using a simple resistor divider so that the microcontroller could take the reading via the analog pin 0 and reverse calculate the input voltage A highly accurate current sense circuit is used to provide the analog pin ...
... The variable generator voltage is scaled down to a less than 5V and 40mA signal using a simple resistor divider so that the microcontroller could take the reading via the analog pin 0 and reverse calculate the input voltage A highly accurate current sense circuit is used to provide the analog pin ...
Constant Current Technology explained
... LED systems use this method. The disadvantage being that for the system to work the system needs a fixed voltage for example 12V. For those of you who remember Ohm’s law, you will recall that the current (I) is directly related to the Voltage (V) over the resistor (R). V = I x R. Therefore if the vo ...
... LED systems use this method. The disadvantage being that for the system to work the system needs a fixed voltage for example 12V. For those of you who remember Ohm’s law, you will recall that the current (I) is directly related to the Voltage (V) over the resistor (R). V = I x R. Therefore if the vo ...
UNDERSTANDING AND USING 723VOLTAGE REGULATORS
... 723 regulator is now barely loafing. Now let's look at a "super duty" current, maybe 30 A. Figure 3 shows a circuit with two drivers and three or more pass transistors (Q3, Q4, and Q5)' The 0.1ohm 5-watt emitter resistors are important because they make the multiple pass transistors share the load. ...
... 723 regulator is now barely loafing. Now let's look at a "super duty" current, maybe 30 A. Figure 3 shows a circuit with two drivers and three or more pass transistors (Q3, Q4, and Q5)' The 0.1ohm 5-watt emitter resistors are important because they make the multiple pass transistors share the load. ...
Slides 2 - WordPress.com
... • Amount of time a wave takes to complete one cycle • If a signal takes 1 sec to go from high to low and then back to high, the frequency is 1 • It is measured in Hz or cycle per second. ...
... • Amount of time a wave takes to complete one cycle • If a signal takes 1 sec to go from high to low and then back to high, the frequency is 1 • It is measured in Hz or cycle per second. ...
Electricity Fundamentals Review
... 37. List the 3 primary by-products produced when coal is burned. ...
... 37. List the 3 primary by-products produced when coal is burned. ...
NDS8434 Single P-Channel Enhancement Mode Field Effect Transistor June 1996 Ω
... These P-Channel enhancement mode power field effect transistors are produced using Fairchild's proprietary, high cell density, DMOS technology. This very high density process is especially tailored to minimize on-state resistance and provide superior switching performance. These devices are particul ...
... These P-Channel enhancement mode power field effect transistors are produced using Fairchild's proprietary, high cell density, DMOS technology. This very high density process is especially tailored to minimize on-state resistance and provide superior switching performance. These devices are particul ...
F2250 Power SyStem SimulatorS General Specifications teChNiCal
... From 20° to 30° C, ±0.4% of reading maximum at 50/60 Hz From 0° to 50° C, ±0.5% of reading absolute maximum Typically 0.2% of reading. ...
... From 20° to 30° C, ±0.4% of reading maximum at 50/60 Hz From 0° to 50° C, ±0.5% of reading absolute maximum Typically 0.2% of reading. ...
Intro to electric currents
... http://phet.colorado.edu/en/simulation/circuit-construction-kit-dc Download the applet. You must have Java 6 on your computer (Mac’s won’t do this, because they won’t run Java). If you do not have the correct version of Java on your computer, you can download it for free from http://www.java.com/en/ ...
... http://phet.colorado.edu/en/simulation/circuit-construction-kit-dc Download the applet. You must have Java 6 on your computer (Mac’s won’t do this, because they won’t run Java). If you do not have the correct version of Java on your computer, you can download it for free from http://www.java.com/en/ ...
Series Circuit - Easy Peasy All-in
... http://phet.colorado.edu/en/simulation/circuit-construction-kit-dc Download the applet. You must have Java 6 on your computer (Mac’s won’t do this, because they won’t run Java). If you do not have the correct version of Java on your computer, you can download it for free from http://www.java.com/en/ ...
... http://phet.colorado.edu/en/simulation/circuit-construction-kit-dc Download the applet. You must have Java 6 on your computer (Mac’s won’t do this, because they won’t run Java). If you do not have the correct version of Java on your computer, you can download it for free from http://www.java.com/en/ ...
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.