Sélectivité et anisotropie des Filtres Spatiaux :
... applied to a voltage source inverter operating as an active filter. This active filter compensates harmonic current and reactive power of nonlinear loads simultaneously. The proposed scheme uses a pulse width modulation (PWM) technique to generate the switching signals to the active filter, p-q theo ...
... applied to a voltage source inverter operating as an active filter. This active filter compensates harmonic current and reactive power of nonlinear loads simultaneously. The proposed scheme uses a pulse width modulation (PWM) technique to generate the switching signals to the active filter, p-q theo ...
article: Brushed DC electric motor
... current (DC). The stator is stationary in space by definition and therefore its current. The current in the rotor is switched by the commutator to also be stationary in space. This is how the relative angle between the stator and rotor magnetic flux is maintained near 90 degrees, which generates the ...
... current (DC). The stator is stationary in space by definition and therefore its current. The current in the rotor is switched by the commutator to also be stationary in space. This is how the relative angle between the stator and rotor magnetic flux is maintained near 90 degrees, which generates the ...
Cable Specification for +/- 12 V Power Supply Used in Electric
... This power supply is also used in the power-pole board for the current sensors and PWM generation/gate drivers. The connector on the boards for this input is a circular 5-pin DIN connector (J90 on both the drives and power-pole boards). Elpac Power Systems power supply WM072-1950-D5 with +/-12 V out ...
... This power supply is also used in the power-pole board for the current sensors and PWM generation/gate drivers. The connector on the boards for this input is a circular 5-pin DIN connector (J90 on both the drives and power-pole boards). Elpac Power Systems power supply WM072-1950-D5 with +/-12 V out ...
reduction of total harmonic distortion in power inverters
... causes; the main ones are the modulation algorithm, nonlinearities in the output filter, dead times, voltage drops across the switches and modulation of the dc bus voltage. The distortion is more evident when using low dc bus voltages. As a result, motors driven by these inverters have important tor ...
... causes; the main ones are the modulation algorithm, nonlinearities in the output filter, dead times, voltage drops across the switches and modulation of the dc bus voltage. The distortion is more evident when using low dc bus voltages. As a result, motors driven by these inverters have important tor ...
Electrical Machines
... alternator/motor. • List the methods used to provide the excitation of a synchronous alternator/motor. • List the starting methods of synchronous ...
... alternator/motor. • List the methods used to provide the excitation of a synchronous alternator/motor. • List the starting methods of synchronous ...
Milad Ataei Ashtiani - Nano-Tera
... This research is looking for methods to improve efficiency and supply energy for power hungry sensor nodes. Methods/Results Ø Designing optimum and architectures in system level, and use of ultra-low power blocks in circuit level. 50% efficiency has been achieved for 20mV harvested voltage up to n ...
... This research is looking for methods to improve efficiency and supply energy for power hungry sensor nodes. Methods/Results Ø Designing optimum and architectures in system level, and use of ultra-low power blocks in circuit level. 50% efficiency has been achieved for 20mV harvested voltage up to n ...
Design and prototyping of electrical machines
... Elektrotechnisches Institut (ETI) develop new concepts to significantly increase the power density of electric traction motors. This can be achieved with increased motor speeds, better cooling technologies and new machine topologies. The power output of electric motors is proportional to torque and ...
... Elektrotechnisches Institut (ETI) develop new concepts to significantly increase the power density of electric traction motors. This can be achieved with increased motor speeds, better cooling technologies and new machine topologies. The power output of electric motors is proportional to torque and ...
Press Applications: eddy-current vs VFDs
... than 50 ft. from the VFD output to motor termination, due to inductance and EMI. ...
... than 50 ft. from the VFD output to motor termination, due to inductance and EMI. ...
Medical PSU PM150-12A
... of 2 x 4 x 1.3 inches are capable of delivering constructed on a printed circuit board. They are specially designed for medical applications, but not for life-supporting equipment. The units are certified also to IEC /EN /UL /CSA 60950-1 and suitable for data networking, computer and telecommunicati ...
... of 2 x 4 x 1.3 inches are capable of delivering constructed on a printed circuit board. They are specially designed for medical applications, but not for life-supporting equipment. The units are certified also to IEC /EN /UL /CSA 60950-1 and suitable for data networking, computer and telecommunicati ...
V/F control - ResearchGate
... Induction motors with squirrel cage rotors are the workhorse of industry because of their low cost and rugged construction. When Squirrel cage induction machine is operated directly from the line voltages(60 Hz/50 Hz essentially constant voltage) an Induction motor is operated at constant speed. How ...
... Induction motors with squirrel cage rotors are the workhorse of industry because of their low cost and rugged construction. When Squirrel cage induction machine is operated directly from the line voltages(60 Hz/50 Hz essentially constant voltage) an Induction motor is operated at constant speed. How ...
Basic AC Drives
... of DC voltage (650 VDC from the converter). Current flows in the motor. The IGBT is switched on for a short period of time, allowing only a small amount of current to build up in the motor and then switched off. The IGBT is switched on and left on for progressively longer periods of time, allowing c ...
... of DC voltage (650 VDC from the converter). Current flows in the motor. The IGBT is switched on for a short period of time, allowing only a small amount of current to build up in the motor and then switched off. The IGBT is switched on and left on for progressively longer periods of time, allowing c ...
Elec467 Power Machines & Transformers
... increase speed up to s=.7 Thus for any given constant load, such as 100% rated load (in bold on figure) changing the rheostat changes the slip which in effect the shaft rotation or speed the motor is rotating. The formula nr =sns is a method for variable speed control of motors. Fig. 5-9 ...
... increase speed up to s=.7 Thus for any given constant load, such as 100% rated load (in bold on figure) changing the rheostat changes the slip which in effect the shaft rotation or speed the motor is rotating. The formula nr =sns is a method for variable speed control of motors. Fig. 5-9 ...
Stepper Motor Driver
... The numbers on the left of this vero diagram refer to the numbers of the pins on the computer printer port, shown below. ...
... The numbers on the left of this vero diagram refer to the numbers of the pins on the computer printer port, shown below. ...
Document
... have a ring gear fitted around them which engages with one or two pinions. Each pinion drive shaft is driven by a variable speed motor. The rating of the motors used for driving the kilns vary from 100-1000 kW. The maximum speed of the kiln is about I rpm and the kiln motor has to be designed for a ...
... have a ring gear fitted around them which engages with one or two pinions. Each pinion drive shaft is driven by a variable speed motor. The rating of the motors used for driving the kilns vary from 100-1000 kW. The maximum speed of the kiln is about I rpm and the kiln motor has to be designed for a ...
Voltage Stability Assessment and Enhancement of a Large Power
... important issue in power system operation. The voltage instability in a power system having significant induction motor loads can be manifested either in the form of delayed voltage recovery or in the form of voltage collapse. When a power system is subjected to a disturbance in the presence of cons ...
... important issue in power system operation. The voltage instability in a power system having significant induction motor loads can be manifested either in the form of delayed voltage recovery or in the form of voltage collapse. When a power system is subjected to a disturbance in the presence of cons ...
E1674 - Endicott Research Group, Inc.
... The E1674's small size, encapsulated package and low input power requirements (typically 3.0 Watts) make it the ideal power source for battery applications where small size, high efficiency and reliability are critical. ...
... The E1674's small size, encapsulated package and low input power requirements (typically 3.0 Watts) make it the ideal power source for battery applications where small size, high efficiency and reliability are critical. ...
ASP Allegro - René Brun Alternative Technik AG
... Our devices recreate this sinusoidal voltage and provide the consumers with the same or better quality of sinusoidal voltage as the public electricity grid. ...
... Our devices recreate this sinusoidal voltage and provide the consumers with the same or better quality of sinusoidal voltage as the public electricity grid. ...
drives mm430
... (rainfall) and excessive temperatures. Installation after a prolonged period of storage may require reform of the capacitors in the inverter. Consult manufacturer for details. ...
... (rainfall) and excessive temperatures. Installation after a prolonged period of storage may require reform of the capacitors in the inverter. Consult manufacturer for details. ...
Classes, Speed Control and Starting of DC motors
... Compound-wound motors are used for cranes and other heavy duty applications where an overload may have to be carried and a heavy starting torque is required. ...
... Compound-wound motors are used for cranes and other heavy duty applications where an overload may have to be carried and a heavy starting torque is required. ...
KB ELECTRONICS, INC. 12095 NW 39th Street, Coral Springs
... motor from 115 VAC or a 180 VDC motor from 230 VAC. There are two modifications to the dual voltage switch that can make the control more versatile. The first modification will allow a standard KBMD-240D DC Drive to operate a 90 VDC PM motor from with either 115 or 230 VAC 50/60 Hz input. This allow ...
... motor from 115 VAC or a 180 VDC motor from 230 VAC. There are two modifications to the dual voltage switch that can make the control more versatile. The first modification will allow a standard KBMD-240D DC Drive to operate a 90 VDC PM motor from with either 115 or 230 VAC 50/60 Hz input. This allow ...
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.