the control of switched reluctance drives
... machines. Much of the classical theory of torque control in electric drives is based on the DC machine, in which torque is proportional to flux multiplied by current. The flux and current are controlled independently, be it through mathematical transformations in AC field-oriented control. Generally ...
... machines. Much of the classical theory of torque control in electric drives is based on the DC machine, in which torque is proportional to flux multiplied by current. The flux and current are controlled independently, be it through mathematical transformations in AC field-oriented control. Generally ...
Product Catalog - Raffel Systems
... docking station mounts into chair fully accessable power supply system comes with two rechargeable batteries, charging station and wall charger enables use of the chair without being connected to a wall outlet up to 150 complete chair cycles on one battery ...
... docking station mounts into chair fully accessable power supply system comes with two rechargeable batteries, charging station and wall charger enables use of the chair without being connected to a wall outlet up to 150 complete chair cycles on one battery ...
Single Phase Induction Motor Speed Control
... To start the motor with low current, two anti-parallel SCRs connected in series with an induction motor to the utility supply. When the project is in operation, the firing angle is adjusted according to the requirement, which leads to changed intensity of a lamp or speed control of an induction mo ...
... To start the motor with low current, two anti-parallel SCRs connected in series with an induction motor to the utility supply. When the project is in operation, the firing angle is adjusted according to the requirement, which leads to changed intensity of a lamp or speed control of an induction mo ...
Action PAK AP1690 ® AC Input, Field Configurable Limit Alarms
... When switching inductive loads, maximum relay life and transient EMI suppression is achieved using external protection (see Figure 2 & 3). Place all protection devices directly across the load and minimize lead lengths. For AC inductive loads, place a properlyrated MOV across the load in parallel wi ...
... When switching inductive loads, maximum relay life and transient EMI suppression is achieved using external protection (see Figure 2 & 3). Place all protection devices directly across the load and minimize lead lengths. For AC inductive loads, place a properlyrated MOV across the load in parallel wi ...
Amplifier Anatomy - Part 1
... Why do we have to convert the ac power from the wall into dc power, and then back to ac? The ac power from the wall is at a fixed voltage and frequency, which are completely different from the audio voltages and frequencies. If we tried to use the ac voltage “as is” for a power supply, we would only ...
... Why do we have to convert the ac power from the wall into dc power, and then back to ac? The ac power from the wall is at a fixed voltage and frequency, which are completely different from the audio voltages and frequencies. If we tried to use the ac voltage “as is” for a power supply, we would only ...
Protection and Control Requirements for Generators
... The protection equipment for a generation facility must protect against faults within that facility and faults on the PG&E Power System. A generation facility must also trip off-line (disconnect from the PG&E Power System automatically) when PG&E’s power is disconnected from the line into which the ...
... The protection equipment for a generation facility must protect against faults within that facility and faults on the PG&E Power System. A generation facility must also trip off-line (disconnect from the PG&E Power System automatically) when PG&E’s power is disconnected from the line into which the ...
Optimally-Sized Design of a Wind/Diesel/Fuel Cell
... Fig- 3-7: Total annual cost of system based on number of electrolyser and fuel cell units ........... 25 Fig- 3-8: Minimum annual cost of system at 18 electrolyser units and 10 FC units ..................... 26 Fig- 3-9: Total annual cost of system at optimal point is 3,900,000 $ ................... ...
... Fig- 3-7: Total annual cost of system based on number of electrolyser and fuel cell units ........... 25 Fig- 3-8: Minimum annual cost of system at 18 electrolyser units and 10 FC units ..................... 26 Fig- 3-9: Total annual cost of system at optimal point is 3,900,000 $ ................... ...
1.2kV Class Super Energy Efficient Harmonic Mitigating Transformer
... Protect from potential damage from weather and construction operations. Store so condensation will not form on or in the transformer housing and if necessary, apply temporary heat where required to obtain suitable service conditions. Handle transformer using proper equipment for lifting and handling ...
... Protect from potential damage from weather and construction operations. Store so condensation will not form on or in the transformer housing and if necessary, apply temporary heat where required to obtain suitable service conditions. Handle transformer using proper equipment for lifting and handling ...
maxon EC motor EC 32 flat with integrated electronics Document ID: 919778en
... decelerated when the speed set value is reduced or the direction changed (direction preselection version). Speed control recommences as soon as the load has reduced its speed by friction to the level specified by the set value speed. ...
... decelerated when the speed set value is reduced or the direction changed (direction preselection version). Speed control recommences as soon as the load has reduced its speed by friction to the level specified by the set value speed. ...
Comparison Study of Singly-Fed Electric Machine with Doubly
... and size larger than that of an IPM motor. It is also to be noted that below synchronous speed, a cage IM can only be in motoring mode and above, generating mode. An IPM cross-section and driving characteristics in terms of iq and id components are shown in Fig. 2 a) and b). Due to the strong magnet ...
... and size larger than that of an IPM motor. It is also to be noted that below synchronous speed, a cage IM can only be in motoring mode and above, generating mode. An IPM cross-section and driving characteristics in terms of iq and id components are shown in Fig. 2 a) and b). Due to the strong magnet ...
NB6L239MNEVB NB6L239MNEVB Evaluation Board User's Manual •
... to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, ...
... to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, ...
NPCC Glossary of Terms - Northeast Power Coordinating Council
... The limiting condition for equipment loadings should be such that cascading outages will not occur due to operation of protective devices upon the failure of facilities. (Various definitions of equipment ratings are found elsewhere in this glossary.) An Area (when capitalized) refers to one of the f ...
... The limiting condition for equipment loadings should be such that cascading outages will not occur due to operation of protective devices upon the failure of facilities. (Various definitions of equipment ratings are found elsewhere in this glossary.) An Area (when capitalized) refers to one of the f ...
COMPARISON OF LINEAR AND SWITCHING DRIVE AMPLIFIERS
... ramp). The limitations are provided by the maximum voltage and current outputs (see Table 1). As a majority of commercial amplifiers, it has a standard electrical network inputs (120/220 VAC, 60/50 Hz), which means that it has an internal rectifying circuit that converts AC network signal into DC. T ...
... ramp). The limitations are provided by the maximum voltage and current outputs (see Table 1). As a majority of commercial amplifiers, it has a standard electrical network inputs (120/220 VAC, 60/50 Hz), which means that it has an internal rectifying circuit that converts AC network signal into DC. T ...
Glossary of Terms For the Electric Utility Industry
... The temperature surrounding an object. American Wire Gage (AWG) – A standard system used in the United States for designating the size of an electrical conductor based on a geometric progression between two conductor sizes. AMF (Lighting) – Average Maintained Foot-candles Amorphous Semiconductor – A ...
... The temperature surrounding an object. American Wire Gage (AWG) – A standard system used in the United States for designating the size of an electrical conductor based on a geometric progression between two conductor sizes. AMF (Lighting) – Average Maintained Foot-candles Amorphous Semiconductor – A ...
HARMONICS - Understanding the Facts
... Table 3. Sample of Harmonic Values for Fluorescent lighting [4]. Low power, AC voltage regulators for light dimmers and small induction motors adjust the phase angle or point on the wave where conduction occurs. Medium power converters are used for motor control in manufacturing and railroad applica ...
... Table 3. Sample of Harmonic Values for Fluorescent lighting [4]. Low power, AC voltage regulators for light dimmers and small induction motors adjust the phase angle or point on the wave where conduction occurs. Medium power converters are used for motor control in manufacturing and railroad applica ...
floating measurements
... Voltage and current measurements are by nature straightforward and absolute. A test point has only one voltage and one current value at a given instant in time. In contrast, power measurements are voltage-, current-, time-, and phase-dependent. Terms like “reactive power” and “power factor,” which w ...
... Voltage and current measurements are by nature straightforward and absolute. A test point has only one voltage and one current value at a given instant in time. In contrast, power measurements are voltage-, current-, time-, and phase-dependent. Terms like “reactive power” and “power factor,” which w ...
Synthesis Techniques for Low-Power Hard Real-Time Systems on Variable Voltage Processors
... renders the technique ineffective. The problem outlined above really arises because conventional systems are designed with a fixed supply voltage. However, there is no fundamental reason that the supply voltage has to be fixed. Instead, it can in principle be varied dynamically at run time. Indeed, ...
... renders the technique ineffective. The problem outlined above really arises because conventional systems are designed with a fixed supply voltage. However, there is no fundamental reason that the supply voltage has to be fixed. Instead, it can in principle be varied dynamically at run time. Indeed, ...
Lab 13
... (VDS) voltages are equal. The two FETs are therefore operating in the saturation region since VDS > VGS VT (remember that VT > 0 for these FETs and VDS = VGS for this configuration). For identical FET devices VGS1 = VGS2 = - VSS/2 since, by KCL, ID1 = ID2 = K (W/L) (VGS - VT)2. It is interesting to ...
... (VDS) voltages are equal. The two FETs are therefore operating in the saturation region since VDS > VGS VT (remember that VT > 0 for these FETs and VDS = VGS for this configuration). For identical FET devices VGS1 = VGS2 = - VSS/2 since, by KCL, ID1 = ID2 = K (W/L) (VGS - VT)2. It is interesting to ...
Compact Microsecond Pulsed Magnetic Field Generator for
... generator is capable of generation magnetic field pulses up to 5 T with rise time in microsecond range and operating under non-repetitive and repetitive modes up to 40 Hz. The FEM modelling of maximal value of pulsed magnetic field and field distribution has been carried out. Simulation results are ...
... generator is capable of generation magnetic field pulses up to 5 T with rise time in microsecond range and operating under non-repetitive and repetitive modes up to 40 Hz. The FEM modelling of maximal value of pulsed magnetic field and field distribution has been carried out. Simulation results are ...
III. Proposed controller design
... drawback of them, sensitivity to grid voltage properties, has got more importance. Effects of balanced and unbalanced voltage sags were studied in [1]. Depend on the amplitude of voltage sag, system could be controllable or not. This problem for DFIGs' operation under unbalanced grid voltage conditi ...
... drawback of them, sensitivity to grid voltage properties, has got more importance. Effects of balanced and unbalanced voltage sags were studied in [1]. Depend on the amplitude of voltage sag, system could be controllable or not. This problem for DFIGs' operation under unbalanced grid voltage conditi ...
DS1812 5V EconoReset with Active High Push-Pull Output FEATURES
... The DS1812 EconoReset uses a precision temperature reference and comparator circuit to monitor the status of the power supply (VCC). When an out-of-tolerance condition is detected, an internal power-fail signal is generated which forces reset to the active state. When VCC returns to an in-tolerance ...
... The DS1812 EconoReset uses a precision temperature reference and comparator circuit to monitor the status of the power supply (VCC). When an out-of-tolerance condition is detected, an internal power-fail signal is generated which forces reset to the active state. When VCC returns to an in-tolerance ...
29 TORQUE 1EASUREMENT West Virginia University SCIENCE
... of motor torque characteristics during speed changes. With this in mind, the writer has analyzed the original Byrne-Mason design and made tests upon their machine. The Byrne-Mason generator having been constructed from an old 2-pole Holtzer-Cabot generator which had 144 segement in the commutator, ...
... of motor torque characteristics during speed changes. With this in mind, the writer has analyzed the original Byrne-Mason design and made tests upon their machine. The Byrne-Mason generator having been constructed from an old 2-pole Holtzer-Cabot generator which had 144 segement in the commutator, ...
Electrification
Electrification is the process of powering by electricity and is usually associated with changing over from another power source. The broad meaning of the term, such as in the history of technology and economic history, usually applies to a region or national economy. Broadly speaking, electrification was the build out of the electrical generating and distribution systems which occurred in Britain, the United States, and other countries from the mid-1880s until around 1950 and is in progress in rural areas in some developing countries. This included the change over from line shaft and belt drive using steam engines and water power to electric motors.The electrification of particular sectors of the economy is called by terms such as factory electrification, household electrification, rural electrification or railway electrification. It may also apply to changing industrial processes such as smelting, melting, separating or refining from coal or coke heating or chemical processes to some type of electric process such as electric arc furnace, electric induction or resistance heating or electrolysis or electrolytic separating.Electrification was called ""the greatest engineering achievement of the 20th Century"" by the National Academy of Engineering.