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... There are two major classifications of ac motors. 1. Induction motor 2. Synchronous motor. 3. Both types use a rotating field in the stator windings. Induction motors work because current is induced in the rotor by the changing current in the stator. This current creates a magnetic field that reacts ...
... There are two major classifications of ac motors. 1. Induction motor 2. Synchronous motor. 3. Both types use a rotating field in the stator windings. Induction motors work because current is induced in the rotor by the changing current in the stator. This current creates a magnetic field that reacts ...
AC Theory - Department of Electrical Engineering
... It is also usual to draw the Phasor diagram using the rms value A of the sinusoidal waveform, rather than with the peak value Am. This is shown on an enlarged diagram. Thus unless otherwise specified it is the rms value that is drawn on a phasor diagram. It should be noted that the values on the pha ...
... It is also usual to draw the Phasor diagram using the rms value A of the sinusoidal waveform, rather than with the peak value Am. This is shown on an enlarged diagram. Thus unless otherwise specified it is the rms value that is drawn on a phasor diagram. It should be noted that the values on the pha ...
AN-8208 — Introduction to Automotive Ignition Systems
... (MPG) engines operating at higher compression ratios need higher sparking voltage and more energy to ignite a lean airand-fuel mixture. ...
... (MPG) engines operating at higher compression ratios need higher sparking voltage and more energy to ignite a lean airand-fuel mixture. ...
Chapter 11 Shielded Metal Arc Welding Principles
... machine can operate at rated current without overheating or breaking down – Rating of 100% means machine can be used at rated amperage on continuous basis • Required by continuous, automatic machine welding ...
... machine can operate at rated current without overheating or breaking down – Rating of 100% means machine can be used at rated amperage on continuous basis • Required by continuous, automatic machine welding ...
IOSR Journal of Electronics and Communication Engineering (IOSR-JECE) ISSN: , PP: 27-32 www.iosrjournals.org
... anywhere between four to ten times the motor full-load current. The magnitude of the torque (or turning force) that the driven equipment will be in excess of 200% of the motor full-load torque. These current and torque surges can be reduced substantially by reducing the voltage supplied to the motor ...
... anywhere between four to ten times the motor full-load current. The magnitude of the torque (or turning force) that the driven equipment will be in excess of 200% of the motor full-load torque. These current and torque surges can be reduced substantially by reducing the voltage supplied to the motor ...
Amateur Radio Technician Class Element 2 Course Presentation
... • T2 – Operating Procedures • T3 – Radio wave characteristics, radio and electromagnetic properties, propagation modes • T4 – Amateur radio practices and station set up T5 – Electrical principles, math for electronics, electronic principles, Ohm’s Law (45, 4) • T6 – Electrical components, semicond ...
... • T2 – Operating Procedures • T3 – Radio wave characteristics, radio and electromagnetic properties, propagation modes • T4 – Amateur radio practices and station set up T5 – Electrical principles, math for electronics, electronic principles, Ohm’s Law (45, 4) • T6 – Electrical components, semicond ...
Experiment 6: Ohm`s Law, RC and RL Circuits
... This lab consists of five main parts. In each you will set up a circuit and measure voltage and current while the battery periodically turns on and off. In the last two parts you are encouraged to develop your own methodology for measuring the resistance and inductance of the coil on the AC/DC Elect ...
... This lab consists of five main parts. In each you will set up a circuit and measure voltage and current while the battery periodically turns on and off. In the last two parts you are encouraged to develop your own methodology for measuring the resistance and inductance of the coil on the AC/DC Elect ...
SG6742ML/MR Highly Integrated Green-Mode PWM Controller SG6742M L/M
... SG6742ML/MR integrates a frequency-hopping function that helps reduce EMI emission of a power supply with minimum line filters. Its built-in synchronized slope compensation achieves stable peak-current-mode control. The proprietary, internal line compensation ensures constant output power limit over ...
... SG6742ML/MR integrates a frequency-hopping function that helps reduce EMI emission of a power supply with minimum line filters. Its built-in synchronized slope compensation achieves stable peak-current-mode control. The proprietary, internal line compensation ensures constant output power limit over ...
NCL30051LEDGEVB - 35-50 Volt, Up to 1.5 Amp, Offline
... secondary pins out with very short wires, the primary leakage can be measured with an inductance meter. In this design the leakage inductance worked out to be between 90 and 100 mH, sufficient to produce a resonant frequency of 36 kHz with a pair of 0.1 mF capacitors (in parallel effectively) for C6 ...
... secondary pins out with very short wires, the primary leakage can be measured with an inductance meter. In this design the leakage inductance worked out to be between 90 and 100 mH, sufficient to produce a resonant frequency of 36 kHz with a pair of 0.1 mF capacitors (in parallel effectively) for C6 ...
MAX17499/MAX17500 Current-Mode PWM Controllers with Programmable Switching Frequency General Description
... The MAX17499/MAX17500 current-mode PWM controllers contain all the control circuitry required for the design of wide-input-voltage isolated and nonisolated power supplies. The MAX17499 is well suited for low input voltage (9.5V DC to 24V DC) power supplies. The MAX17500 is well suited for universal ...
... The MAX17499/MAX17500 current-mode PWM controllers contain all the control circuitry required for the design of wide-input-voltage isolated and nonisolated power supplies. The MAX17499 is well suited for low input voltage (9.5V DC to 24V DC) power supplies. The MAX17500 is well suited for universal ...
Experiment 4
... Transformers are arguably the most universally applied pieces of electrical equipment. As such, they range in size from miniature units weighing ounces to huge units weighing tons. All transformers, however, exhibit the same basic properties. When mutual induction is permitted between two coils or w ...
... Transformers are arguably the most universally applied pieces of electrical equipment. As such, they range in size from miniature units weighing ounces to huge units weighing tons. All transformers, however, exhibit the same basic properties. When mutual induction is permitted between two coils or w ...
IOSR Journal of Dental and Medical Sciences (IOSR-JDMS)
... power quality problems occur when a nonstandard voltage, current or frequency results in failure or maloperation of end user equipments. The most important PQ issues are voltage sag [4, 5], and harmonics [6]. To reduce the severity of PQ problems, mitigation devices can be placed in the transmission ...
... power quality problems occur when a nonstandard voltage, current or frequency results in failure or maloperation of end user equipments. The most important PQ issues are voltage sag [4, 5], and harmonics [6]. To reduce the severity of PQ problems, mitigation devices can be placed in the transmission ...
AN-162 LM2907 Tachometer/Speed Switch Building Block
... with signals referenced to ground. Q7, Q8, D4, and D5 comprise an active load with positive feedback. This load behaves as a bi-stable flip-flop which may be set or reset depending upon the currents supplied from Q2 and Q3. Consider the situation where Q2 and Q3 are conducting equally, i.e. the inpu ...
... with signals referenced to ground. Q7, Q8, D4, and D5 comprise an active load with positive feedback. This load behaves as a bi-stable flip-flop which may be set or reset depending upon the currents supplied from Q2 and Q3. Consider the situation where Q2 and Q3 are conducting equally, i.e. the inpu ...
New algorithms to improve the sensitivity of differential protection of
... sensitivity of protective devices allows to give a warning message if low-current faults occur. Of course all high current faults have to be detected within milliseconds by the new algorithms, too. The percentage-differential relays are generally available with different percent slopes. The purpose ...
... sensitivity of protective devices allows to give a warning message if low-current faults occur. Of course all high current faults have to be detected within milliseconds by the new algorithms, too. The percentage-differential relays are generally available with different percent slopes. The purpose ...
GIGAVAC GX46, EPIC High Power DC Contactor
... 6 Contactor has two coils. Both are used for pick-up, and then in approximately 75 milliseconds, one coil is electronically removed from the coil drive circuit. The remaining coil supplies low continuous hold power sufficient for the contactor to meet all of its specified performance specifications. ...
... 6 Contactor has two coils. Both are used for pick-up, and then in approximately 75 milliseconds, one coil is electronically removed from the coil drive circuit. The remaining coil supplies low continuous hold power sufficient for the contactor to meet all of its specified performance specifications. ...
Microelectromechanical Devices
... Phase-Controlled Cycloconverters (cont’d) At t=0, +ve load current is taken by the +ve converter only (iP=i0). From 0->/2, rising +ve load current will create a +ve voltage drop (vL=Ldi0/dt) in the primary winding of the IGR. This creates a -ve voltage drop in the secondary winding of the IGR -> D ...
... Phase-Controlled Cycloconverters (cont’d) At t=0, +ve load current is taken by the +ve converter only (iP=i0). From 0->/2, rising +ve load current will create a +ve voltage drop (vL=Ldi0/dt) in the primary winding of the IGR. This creates a -ve voltage drop in the secondary winding of the IGR -> D ...
Microelectromechanical Devices
... Phase-Controlled Cycloconverters (cont’d) At t=0, +ve load current is taken by the +ve converter only (iP=i0). From 0->/2, rising +ve load current will create a +ve voltage drop (vL=Ldi0/dt) in the primary winding of the IGR. This creates a -ve voltage drop in the secondary winding of the IGR -> D ...
... Phase-Controlled Cycloconverters (cont’d) At t=0, +ve load current is taken by the +ve converter only (iP=i0). From 0->/2, rising +ve load current will create a +ve voltage drop (vL=Ldi0/dt) in the primary winding of the IGR. This creates a -ve voltage drop in the secondary winding of the IGR -> D ...
HMC853LC3 数据资料DataSheet下载
... The HMC853LC3 is a D-Type Flip-Flop designed to support data transmission rates of up to 28 Gbps, and clock frequencies as high as 28 GHz. During normal operation, data is transferred to the outputs on the positive edge of the clock. Reversing the clock inputs allows for negative-edge triggered appl ...
... The HMC853LC3 is a D-Type Flip-Flop designed to support data transmission rates of up to 28 Gbps, and clock frequencies as high as 28 GHz. During normal operation, data is transferred to the outputs on the positive edge of the clock. Reversing the clock inputs allows for negative-edge triggered appl ...
Spark-gap transmitter
A spark-gap transmitter is a device that generates radio frequency electromagnetic waves using a spark gap.Spark gap transmitters were the first devices to demonstrate practical radio transmission, and were the standard technology for the first three decades of radio (1887–1916). Later, more efficient transmitters were developed based on rotary machines like the high-speed Alexanderson alternators and the static Poulsen Arc generators.Most operators, however, still preferred spark transmitters because of their uncomplicated design and because the carrier stopped when the telegraph key was released, which let the operator ""listen through"" for a reply. With other types of transmitter, the carrier could not be controlled so easily, and they required elaborate measures to modulate the carrier and to prevent transmitter leakage from de-sensitizing the receiver. After WWI, greatly improved transmitters based on vacuum tubes became available, which overcame these problems, and by the late 1920s the only spark transmitters still in regular operation were ""legacy"" installations on naval vessels. Even when vacuum tube based transmitters had been installed, many vessels retained their crude but reliable spark transmitters as an emergency backup. However, by 1940, the technology was no longer used for communication. Use of the spark-gap transmitter led to many radio operators being nicknamed ""Sparks"" long after they ceased using spark transmitters. Even today, the German verb funken, literally, ""to spark,"" also means ""to send a radio message or signal.""