- sir cr reddy college of engineering
... 8. two transformers a and B of different ratings but equal voltage ratios share a load of 500kva at 0.8 p.f lagging at 400v by operating in parallel.transformer a has rating of 500kva, resistance drop of 1.5% and reactance drop of 5%. Transformer B has rating of ...
... 8. two transformers a and B of different ratings but equal voltage ratios share a load of 500kva at 0.8 p.f lagging at 400v by operating in parallel.transformer a has rating of 500kva, resistance drop of 1.5% and reactance drop of 5%. Transformer B has rating of ...
Magnetism - Burke County Public Schools
... direction out of the generator Used in smaller applications Electric current in the loop of a DC generator alternates—that is, it changes directions—but in the outer circuit it travels in only one direction, and drops to zero twice with each rotation of the loop. By arranging more loops, a steadier ...
... direction out of the generator Used in smaller applications Electric current in the loop of a DC generator alternates—that is, it changes directions—but in the outer circuit it travels in only one direction, and drops to zero twice with each rotation of the loop. By arranging more loops, a steadier ...
Harvest human kinetic energy to power portable electronics†
... structural arrangement of the rotor affects the power output. Given constant outer radius of the permanent magnet rm and its initial thickness, the change of the sector angle of each magnet φm will affect the power output. Fig. 5 shows the power output performance with respect to the magnet sector, ...
... structural arrangement of the rotor affects the power output. Given constant outer radius of the permanent magnet rm and its initial thickness, the change of the sector angle of each magnet φm will affect the power output. Fig. 5 shows the power output performance with respect to the magnet sector, ...
ZJ013646652
... Abstract:-This paper presents a design of PMSM for Electric power Steering which are widely being applied in automotive application. Automotive control systems are complex systems involving multidisciplinary knowledge. Permanent magnet synchronous machines are known as a good candidate for Electric ...
... Abstract:-This paper presents a design of PMSM for Electric power Steering which are widely being applied in automotive application. Automotive control systems are complex systems involving multidisciplinary knowledge. Permanent magnet synchronous machines are known as a good candidate for Electric ...
Reducing high frequency ground currents to zero
... electrical distribution systems installed a decade ago now harbor major inadequacies. Meeting all requirements of National Electric Code Sec. 250 should not be difficult. Unfortunately, many systems that were initially grounded correctly are no longer in compliance. For example, many cities have rep ...
... electrical distribution systems installed a decade ago now harbor major inadequacies. Meeting all requirements of National Electric Code Sec. 250 should not be difficult. Unfortunately, many systems that were initially grounded correctly are no longer in compliance. For example, many cities have rep ...
Causes of Motor Failures
... Any voltage drop below 10% will reduce starting torque which can be serious because starting times may increase beyond allowable limits. Winding failure from extreme voltage variations are identical to those of overloads because the input current is uniformily excessive. ...
... Any voltage drop below 10% will reduce starting torque which can be serious because starting times may increase beyond allowable limits. Winding failure from extreme voltage variations are identical to those of overloads because the input current is uniformily excessive. ...
Static characteristics of a new doubly salient permanent magnet motor
... has been paid to this motor since its advent. However, the static characteristics of the motor, being the fundamentals of design, analysis and control, have received insufficient research. The PM flux linkage and the inductance in the available literatures are obtained under the assumptions that the ...
... has been paid to this motor since its advent. However, the static characteristics of the motor, being the fundamentals of design, analysis and control, have received insufficient research. The PM flux linkage and the inductance in the available literatures are obtained under the assumptions that the ...
Brass. A hard, strong, corrosion-resistant alloy made by combining
... Bronze. A hard, strong, corrosion-resistant alloy made by combining copper and (usually) tin. Brushed direct current (BDC) motor. A type of DC motor that relies on a mechanical commutator. The name derives from the fact that these commutators have spring-loaded, electricallyconductive pads or contac ...
... Bronze. A hard, strong, corrosion-resistant alloy made by combining copper and (usually) tin. Brushed direct current (BDC) motor. A type of DC motor that relies on a mechanical commutator. The name derives from the fact that these commutators have spring-loaded, electricallyconductive pads or contac ...
magnetic field lines
... windings. • If the current in the primary windings were DC, there would be NO induced current in the secondary circuit. ...
... windings. • If the current in the primary windings were DC, there would be NO induced current in the secondary circuit. ...
Electromagnetism
... Eg) a North pole of a magnet is moved into the right side of a coil as illustrated below As the magnet is moved past the coils, an induced current in the coils (generator effect) will generate a magnetic field to oppose the motion of the magnet The right end of the coil will become a north pole to e ...
... Eg) a North pole of a magnet is moved into the right side of a coil as illustrated below As the magnet is moved past the coils, an induced current in the coils (generator effect) will generate a magnetic field to oppose the motion of the magnet The right end of the coil will become a north pole to e ...
Induction motor
An induction or asynchronous motor is an AC electric motor in which the electric current in the rotor needed to produce torque is obtained by electromagnetic induction from the magnetic field of the stator winding. An induction motor therefore does not require mechanical commutation, separate-excitation or self-excitation for all or part of the energy transferred from stator to rotor, as in universal, DC and large synchronous motors. An induction motor's rotor can be either wound type or squirrel-cage type.Three-phase squirrel-cage induction motors are widely used in industrial drives because they are rugged, reliable and economical. Single-phase induction motors are used extensively for smaller loads, such as household appliances like fans. Although traditionally used in fixed-speed service, induction motors are increasingly being used with variable-frequency drives (VFDs) in variable-speed service. VFDs offer especially important energy savings opportunities for existing and prospective induction motors in variable-torque centrifugal fan, pump and compressor load applications. Squirrel cage induction motors are very widely used in both fixed-speed and variable-frequency drive (VFD) applications. Variable voltage and variable frequency drives are also used in variable-speed service.