Diagnostic News On-Line Monitoring of Partial Discharge in Voltage Source January 2015
... high voltage electrical equipment, such as rotating machines, cables, switchgear and transformers. Most recently he was manager of 40 specialists at Kinectrics who performed these services. He is an active member of numerous technical committees, and contributed to many IEEE and IEC standards ...
... high voltage electrical equipment, such as rotating machines, cables, switchgear and transformers. Most recently he was manager of 40 specialists at Kinectrics who performed these services. He is an active member of numerous technical committees, and contributed to many IEEE and IEC standards ...
Using E-Motor Emulators for Close-To
... The characteristics of the original motor to be emulated are embedded in the E-ME as a software model (which the user can influence). This model controls behavior of the motor phases and the rotor sensor in a virtual way. Software models are available that correspond to various basic motor types tha ...
... The characteristics of the original motor to be emulated are embedded in the E-ME as a software model (which the user can influence). This model controls behavior of the motor phases and the rotor sensor in a virtual way. Software models are available that correspond to various basic motor types tha ...
Design of Z-Source Inverter for Voltage Boost Application
... will be on, either one upper and two lower switches, or two upper and one lower switch. A dead time is given between switching off the upper switch and switching on the lower switch and vice versa. This ensures that both switches are not conductive when they change states from on to off, or vice ver ...
... will be on, either one upper and two lower switches, or two upper and one lower switch. A dead time is given between switching off the upper switch and switching on the lower switch and vice versa. This ensures that both switches are not conductive when they change states from on to off, or vice ver ...
T5 Ballasts for Today`s High Efficiency Lighting Fixtures
... incorporate all the features from our traditional T5 product line with the advantage of being 8% more efficient, resulting in additional energy savings with T5 systems. AccuStart5 ballasts feature Programmed Rapid Starting for long lamp life, especially when used with occupancy sensors. Universal in ...
... incorporate all the features from our traditional T5 product line with the advantage of being 8% more efficient, resulting in additional energy savings with T5 systems. AccuStart5 ballasts feature Programmed Rapid Starting for long lamp life, especially when used with occupancy sensors. Universal in ...
View Poster
... exist between 20Hz and 1.2kHz, so up to 2,400 switches per second are required. To accomplish this we use a power transistor, a device designed to switch large power loads at high frequency. Supply and coil Input ...
... exist between 20Hz and 1.2kHz, so up to 2,400 switches per second are required. To accomplish this we use a power transistor, a device designed to switch large power loads at high frequency. Supply and coil Input ...
Modelling and Analysis of Controller for Three
... the Shunt Active Power Filter (SAPF) is more prominent at medium/high voltage applications, and also it provides higher efficiency. SAPF in the power circuit can be used either by using the voltage-sourced PWM converter equipped with a DC capacitor or a current-sourced PWM converter equipped with a ...
... the Shunt Active Power Filter (SAPF) is more prominent at medium/high voltage applications, and also it provides higher efficiency. SAPF in the power circuit can be used either by using the voltage-sourced PWM converter equipped with a DC capacitor or a current-sourced PWM converter equipped with a ...
Ieee paper
... stator windings of the conventional induction motor drives and feeding it from both sides using separate inverter systems have their own advantages like low ripple in the motor output torque, ability to combine different power sources, fault tolerant and less noise[2]. Thus the system can find its a ...
... stator windings of the conventional induction motor drives and feeding it from both sides using separate inverter systems have their own advantages like low ripple in the motor output torque, ability to combine different power sources, fault tolerant and less noise[2]. Thus the system can find its a ...
DATAFLEX® Torque measuring shaft NEW
... The connection housing DF2 can easily be combined with all DATAFLEX® torque measuring shafts disposing of a retainer for top hat rail assembly as well as terminal screws for an easy connection of external devices. The following features save the purchase of expensive measuring amplifiers and convert ...
... The connection housing DF2 can easily be combined with all DATAFLEX® torque measuring shafts disposing of a retainer for top hat rail assembly as well as terminal screws for an easy connection of external devices. The following features save the purchase of expensive measuring amplifiers and convert ...
Document
... Increased power losses in cables, motors and distribution transformers Third harmonics add up in the Neutral conductor and cause overheating Harmonics may cause migrating currents due to impedance issues False triggering of phase controllers and power factor correction logic Can cause compensation c ...
... Increased power losses in cables, motors and distribution transformers Third harmonics add up in the Neutral conductor and cause overheating Harmonics may cause migrating currents due to impedance issues False triggering of phase controllers and power factor correction logic Can cause compensation c ...
Physics 536 - Assignment #6 - Due March 19
... to force SPICE to use a maximal time step of 1 µs. Provide the SPICE netlist and a graph of the voltage at nodes 1 and 2. At approximately what positive and negative voltages does the output signal start to become limited by the diodes? ...
... to force SPICE to use a maximal time step of 1 µs. Provide the SPICE netlist and a graph of the voltage at nodes 1 and 2. At approximately what positive and negative voltages does the output signal start to become limited by the diodes? ...
MEDWAYELECTRIC MOTOR CENTRE
... To establish a repair or replace policy for low and medium voltage AC electric motors Establish and agree size of electric motors affected by this policy Provide Brook Crompton/ABB range of low and medium voltage AC electric motors on a consignment stock basis after agreeing to size and quantity of ...
... To establish a repair or replace policy for low and medium voltage AC electric motors Establish and agree size of electric motors affected by this policy Provide Brook Crompton/ABB range of low and medium voltage AC electric motors on a consignment stock basis after agreeing to size and quantity of ...
Performing locked rotor test on squirrel cage motors
... excessive currents. Tests should be performed under the same conditions of rotor current and frequency that will occur during normal operating conditions. The IEEE recommends using 25 % of the rated frequency. This is because the rotor’s effective resistance and leakage inductance at the reduced fre ...
... excessive currents. Tests should be performed under the same conditions of rotor current and frequency that will occur during normal operating conditions. The IEEE recommends using 25 % of the rated frequency. This is because the rotor’s effective resistance and leakage inductance at the reduced fre ...
LM3914 Dot/Bar Display Driver
... analog display. A single pin changes the display from a moving dot to a bar graph. Current drive to the LEDs is regulated and programmable, eliminating the need for resistors. This feature is one that allows operation of the whole system from less than 3V. The circuit contains its own adjustable ref ...
... analog display. A single pin changes the display from a moving dot to a bar graph. Current drive to the LEDs is regulated and programmable, eliminating the need for resistors. This feature is one that allows operation of the whole system from less than 3V. The circuit contains its own adjustable ref ...
Word Work File L_987757493
... - Spring resists motion of coil - When force from spring is equal to force from motor, needle is still - Depending on resistance of circuit, different scale is read ...
... - Spring resists motion of coil - When force from spring is equal to force from motor, needle is still - Depending on resistance of circuit, different scale is read ...
Using Omron Power Supplies to Make Positive and
... physics experiments, and more. When the outputs of a power supply are separated or floating this enables the creating of positive/negative outputs using two power supplies. Refer to the Omron power supply data sheet to determine if series operation or connection is permitted. The following table sho ...
... physics experiments, and more. When the outputs of a power supply are separated or floating this enables the creating of positive/negative outputs using two power supplies. Refer to the Omron power supply data sheet to determine if series operation or connection is permitted. The following table sho ...
Torque Ripple Calculation of the Two
... inserted into the air-gap to protect the stator from water, and the whole rotor body is inserted into another stainless steel cylinder, to protect the rotor cage and lamination. The stator and rotor cylinders cause additional losses and significantly deteriorate motor performance. Water leakage prob ...
... inserted into the air-gap to protect the stator from water, and the whole rotor body is inserted into another stainless steel cylinder, to protect the rotor cage and lamination. The stator and rotor cylinders cause additional losses and significantly deteriorate motor performance. Water leakage prob ...
SECTION 4 ELECTRIC MOTORS UNIT 20 TROUBLESHOOTING
... • Wiring must be in good condition • Loose connections can cause system problems – Can result in oxidation on electrical contacts – Oxidation increases circuit resistance – Resistance increases the amount of heat generated – Can result in low voltage being supplied to the motor – Low voltage can res ...
... • Wiring must be in good condition • Loose connections can cause system problems – Can result in oxidation on electrical contacts – Oxidation increases circuit resistance – Resistance increases the amount of heat generated – Can result in low voltage being supplied to the motor – Low voltage can res ...
Motor Efficiency and Fault Zone Analysis
... 1. Power Quality. The focus on this fault zone follows the increasing use and reliance on AC and DC drives. An ongoing concern about power quality is the possibility of distortion of voltage and current levels from variable frequency drives. Other sources of trouble with power quality include non-li ...
... 1. Power Quality. The focus on this fault zone follows the increasing use and reliance on AC and DC drives. An ongoing concern about power quality is the possibility of distortion of voltage and current levels from variable frequency drives. Other sources of trouble with power quality include non-li ...
UNIVERSAL MOTOR - Home
... The starting torque of a universal motor is determined by the current that flows through the armature www.technologyfutuare.com ...
... The starting torque of a universal motor is determined by the current that flows through the armature www.technologyfutuare.com ...
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.