EMI wave and harmonic analyzer
... the frequency control is a combination of different controls. ...
... the frequency control is a combination of different controls. ...
Improving Efficiency in AC drives: Comparison of Topologies and Device Technologies
... The high-speed drives require higher switching frequencies. An AC induction motor or a Permanent Magnet motor (PM motor) with 2 poles specially designed for high speed operation can achieve up to 90,000 rpm, requiring a fundamental frequency (f O) of 1.5 kHz. Typically the PWM switching frequency (f ...
... The high-speed drives require higher switching frequencies. An AC induction motor or a Permanent Magnet motor (PM motor) with 2 poles specially designed for high speed operation can achieve up to 90,000 rpm, requiring a fundamental frequency (f O) of 1.5 kHz. Typically the PWM switching frequency (f ...
NATF Load Modeling Practices
... • Current trend: Fan motors are being replaced with Electronically Commutated Motors (ECMs) Energy Efficiency Upgrade – DC motors, controllable speed ...
... • Current trend: Fan motors are being replaced with Electronically Commutated Motors (ECMs) Energy Efficiency Upgrade – DC motors, controllable speed ...
A High Step-up Bidirectional Isolated Dual-Active
... voltage-doubler rectifier (TL-VDR) is presented for energy storage applications. The voltage conversion ratio is enhanced and the voltage stresses on transformer windings are reduced with the help of TL-VDR. Optimized pulse widthmodulation (PWM) plus dual phase-shift-modulation (PSM) strategy is app ...
... voltage-doubler rectifier (TL-VDR) is presented for energy storage applications. The voltage conversion ratio is enhanced and the voltage stresses on transformer windings are reduced with the help of TL-VDR. Optimized pulse widthmodulation (PWM) plus dual phase-shift-modulation (PSM) strategy is app ...
Abstract - PG Embedded systems
... achieved by light being generated on one side of a transparent insulating gap and being detected on the other side of the gap without an electrical connection between the two sides (except for a minor amount of coupling capacitance). ...
... achieved by light being generated on one side of a transparent insulating gap and being detected on the other side of the gap without an electrical connection between the two sides (except for a minor amount of coupling capacitance). ...
Solid – State VARIAC ® Replacement - hot
... 5. This circuit will be follow on developed for high power applications. 6. Current and voltage can be servo feedback to controller using isolated sensors. 7. Can be used with single or multiple primary transformers. This disadvantage of this topology is both IGBT gates have no reference to signal g ...
... 5. This circuit will be follow on developed for high power applications. 6. Current and voltage can be servo feedback to controller using isolated sensors. 7. Can be used with single or multiple primary transformers. This disadvantage of this topology is both IGBT gates have no reference to signal g ...
Fabrication of Steam Power Plant
... Fabrication of Steam Power Plant A thermal or steam power plant basically works on Rankine cycle i.e. here heat is converted into work. This cycle generates about 90% of all electric power used throughout the world. The two most common heating processes used in these power plants are nuclear fission ...
... Fabrication of Steam Power Plant A thermal or steam power plant basically works on Rankine cycle i.e. here heat is converted into work. This cycle generates about 90% of all electric power used throughout the world. The two most common heating processes used in these power plants are nuclear fission ...
Eliminate Voltage Unbalance - ALL
... motor. Voltage unbalance at the motor terminals can cause current unbalance that is far out of proportion to the voltage unbalance. Unbalanced currents lead to torque pulsations, increased vibrations and mechanical stresses, increased losses resulting in lower efficiency, and motor overheating, whic ...
... motor. Voltage unbalance at the motor terminals can cause current unbalance that is far out of proportion to the voltage unbalance. Unbalanced currents lead to torque pulsations, increased vibrations and mechanical stresses, increased losses resulting in lower efficiency, and motor overheating, whic ...
IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE)
... reuse of their switching frequency. Consequently, the delivered trapezoidal voltage pulses reach considerably high values of dv/dt (often more than 10 kv/μs). Situated in a system consisting of the PWM inverter, feeding cable and induction motor (IM) is then strongly influenced by its leakage capaci ...
... reuse of their switching frequency. Consequently, the delivered trapezoidal voltage pulses reach considerably high values of dv/dt (often more than 10 kv/μs). Situated in a system consisting of the PWM inverter, feeding cable and induction motor (IM) is then strongly influenced by its leakage capaci ...
EEEB283 Electrical Machines & Drives
... Variable Voltage (amplitude), Constant Frequency Disadvantages: limited speed range when applied to Class B (low-slip) motors Excessive stator currents at low speeds high copper losses Distorted phase current in machine and line (harmonics introduced by thyristor switching) Poor line p ...
... Variable Voltage (amplitude), Constant Frequency Disadvantages: limited speed range when applied to Class B (low-slip) motors Excessive stator currents at low speeds high copper losses Distorted phase current in machine and line (harmonics introduced by thyristor switching) Poor line p ...
Schneider Altivar ATV12 Quick Start Guide
... - If the DC bus capacitors do not discharge completely, contact your local Schneider Electric representative. Do not repair or operate the drive • Install and close all covers before applying power or starting and stopping the drive. Failure to follow these instructions will result in death or serio ...
... - If the DC bus capacitors do not discharge completely, contact your local Schneider Electric representative. Do not repair or operate the drive • Install and close all covers before applying power or starting and stopping the drive. Failure to follow these instructions will result in death or serio ...
Voltage Divider
... A voltage divider can be used to create more than one fixed output from a single voltage source. Many electronic systems require multiple voltages for components such as memory devices, microprocessors, and displays. In this experiment, you will design and build a simple unloaded voltage divider to ...
... A voltage divider can be used to create more than one fixed output from a single voltage source. Many electronic systems require multiple voltages for components such as memory devices, microprocessors, and displays. In this experiment, you will design and build a simple unloaded voltage divider to ...
LAB TECHNICIAN POSITION: Responsible for building and testing
... providing analytical evaluation. Will gather technical information, procure motor components, operate various measurement and electrical test equipment, present professional reports, and provide input regarding motor performance and troubleshooting. REQUIREMENTS: Position requires a minimum 2 year t ...
... providing analytical evaluation. Will gather technical information, procure motor components, operate various measurement and electrical test equipment, present professional reports, and provide input regarding motor performance and troubleshooting. REQUIREMENTS: Position requires a minimum 2 year t ...
gucevi jenerator san ve tic ltd sti
... The DSE 7320 conrol module is a standard addition to our generator sets from 220 kVA upwards and it has been designed to start and stop diesel andgas generating sets that include electronic and non electronic engines. The DSE 7320 includes the additional capability of being able to monitor a mains ( ...
... The DSE 7320 conrol module is a standard addition to our generator sets from 220 kVA upwards and it has been designed to start and stop diesel andgas generating sets that include electronic and non electronic engines. The DSE 7320 includes the additional capability of being able to monitor a mains ( ...
MaXEA1 Eval Board Datasheet
... 2. Connect cables to the power supply connectors in the same fashion. For ease of testing, cables with “banana plug” connectors on one end and bare wire on the other can be used. 3. Connect an SMA cable to the input connector. Furthermore a high impedance scope probe can be attached to the load test ...
... 2. Connect cables to the power supply connectors in the same fashion. For ease of testing, cables with “banana plug” connectors on one end and bare wire on the other can be used. 3. Connect an SMA cable to the input connector. Furthermore a high impedance scope probe can be attached to the load test ...
150Vdc Servo System
... The edge filter option reduces the rate of change of output voltage by a factor of 10, substantially reducing noise in the system. Copley amplifiers typically have a 200ns-rise time (high frequency component in the Mega Hz range) so, by using the edge filter, the rise time can be increased to a 2usr ...
... The edge filter option reduces the rate of change of output voltage by a factor of 10, substantially reducing noise in the system. Copley amplifiers typically have a 200ns-rise time (high frequency component in the Mega Hz range) so, by using the edge filter, the rise time can be increased to a 2usr ...
SOT-723 Plastic-Encapsulate Diodes 5V0AT7 CESDLC
... JIANGSU CHANGJIANG ELECTRONICS TECHNOLOGY CO., LTD ...
... JIANGSU CHANGJIANG ELECTRONICS TECHNOLOGY CO., LTD ...
In a typical DC motor, there are permanent magnets on the outside
... The most common rotor is a squirrel-cage rotor . It is made up of bars of either solid copper (most common) or aluminum that span the length of the rotor, and are connected through a ring at each end. The rotor bars in squirrel-cage induction motors are not straight, but have some skew to reduce noi ...
... The most common rotor is a squirrel-cage rotor . It is made up of bars of either solid copper (most common) or aluminum that span the length of the rotor, and are connected through a ring at each end. The rotor bars in squirrel-cage induction motors are not straight, but have some skew to reduce noi ...
1. Explain the constructional details of Alternator in detail with neat
... synchronous condenser method. The 3 phase load takes current IL at low lagging power factor cosϕL. The synchronous condenser takes a current Im which leads the voltage by an angle ϕm. The resultant current I is the vector sum of Im and IL and lags behind the voltage by an angle f. It is clear that ‘ ...
... synchronous condenser method. The 3 phase load takes current IL at low lagging power factor cosϕL. The synchronous condenser takes a current Im which leads the voltage by an angle ϕm. The resultant current I is the vector sum of Im and IL and lags behind the voltage by an angle f. It is clear that ‘ ...
Variable-frequency drive
A variable-frequency drive (VFD) (also termed adjustable-frequency drive, variable-speed drive, AC drive, micro drive or inverter drive) is a type of adjustable-speed drive used in electro-mechanical drive systems to control AC motor speed and torque by varying motor input frequency and voltage.VFDs are used in applications ranging from small appliances to the largest of mine mill drives and compressors. However, around 25% of the world's electrical energy is consumed by electric motors in industrial applications, which are especially conducive for energy savings using VFDs in centrifugal load service, and VFDs' global market penetration for all applications is still relatively small. That lack of penetration highlights significant energy efficiency improvement opportunities for retrofitted and new VFD installations.Over the last four decades, power electronics technology has reduced VFD cost and size and has improved performance through advances in semiconductor switching devices, drive topologies, simulation and control techniques, and control hardware and software.VFDs are available in a number of different low- and medium-voltage AC-AC and DC-AC topologies.