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Should a starting windings in the split phase motor fail to energise what would be the result?
Wiki User
∙ 10y ago
what will be the result if the starting winding in a split phase motor fails
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∙ 10y ago
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What affect does a changing magnetic field strength have on an ac generator power output?
By increasing the field current (current flowing through the rotor windings), the magnetic field generated by these windings will increase. This increased magnetic field will result in a larger current flow in the stator windings (the output of the generator). This in turn causes a larger pull against the rotation of the rotor, causing it to slow down. The governor will then kick in, allowing more steam/ power to the prime mover to keep speed steady. Assuming all is working correctly, the output power will increase as the magnetic field is increased (to a limit).
What is the purpose of running capacitor?
If I understand the question, a "run" capacitor is used in a squirrel-cage motor to create a phase shift in one of the windings. The result is a rotating magnetic field within the motor which causes the rotor to rotate in sympathy. In synchronous motors, a "start" capacitor is used to create a rotating field for starting, then disconnected.
How we select a transformer by vectorgroup?
A Vector group is the International Electrotechnical Commission (IEC) method of categorizing the primary and secondary winding configurations of three-phase transformers. Within a polyphase system power transformer it indicates the windings configurations and the difference in phase angle between them. The phase windings of a polyphase transformer can be connected together internally in different configurations, depending on what characteristics are needed from the transformer. For example, in a three-phase power system, it may be necessary to connect a three-wire system to a four-wire system, or vice versa. Because of this, transformers are manufactured with a variety of winding configurations to meet these requirements. Different combinations of winding connections will result in different phase angles between the voltages on the windings. This limits the types of transformers that can be connected between two systems, because mismatching phase angles can result in circulating current and other system disturbances. Symbol designation The vector group provides a simple way of indicating how the internal connections of a particular transformer are arranged. In the system adopted by the IEC, the vector group is indicated by a code consisting of two or three letters, followed by one or two digits. The letters indicate the winding configuration as follows: * D: Delta winding, also called a mesh winding. Each phase terminal connects to two windings, so the windings form a triangular configuration with the terminals on the points of the triangle. * Y: Wye winding, also called a star winding. Each phase terminal connects to one end of a winding, and the other end of each winding connects to the other two at a central point, so that the configuration resembles a capital letter Y. The central point may or may not be connected outside of the transformer. * Z: Zigzag winding, or interconnected star winding. Basically similar to a star winding, but the windings are arranged so that the three legs are "bent" when the phase diagram is drawn. Zigzag-wound transformers have special characteristics and are not commonly used where these characteristics are not needed. * III: Independent windings. The three windings are not interconnected inside the transformer at all, and must be connected externally. In the IEC vector group code, each letter stands for one set of windings. The HV winding is designated with a capital letter, followed by medium or low voltage windings designated with a lowercase letter. The digits following the letter codes indicate the difference in phase angle between the windings, with HV winding is taken as a reference. The number is in units of 30 degrees. For example, a transformer with a vector group of Dy1 has a delta-connected HV winding and a wye-connected LV winding. The phase angle of the LV winding leads the HV by 30 degrees. The point of confusion is in how to use this notation in a step-up transformer. As the IEC60076-1 standard has stated, the notation is HV-LV in sequence. For example, a step-up transformer with a delta-connected primary, and star-connected secondary, is not written as 'dY11', but 'Yd11'. The 11 indicates the LV phase lags 30 degree behind the HV side. Transformers built to ANSI standards usually do not have the vector group shown on their nameplate and instead a vector diagram is given to show the relationship between the primary and other windings.
What is tranformer turn ratio?
Transformer turn ratio is the ratio between the turns on the primary side and the number of turns on the secondary side. For instance if you have a turn ration of 100:200 the primary side has 100 turns and the secondary side has 200 turns. This will be a step up transformer. 10 volts AC into the primary side will result in 20 volts on the secondary side. There will be a decrease in current but the voltage will increase. The total power into and out of the transformer will be the same minus some losses for resistance in the windings.
Is the reverse effect of converting rotation to electrical energy is possible when the power is turned off in the ceiling fan?
The type of electric motor commonly used in ceiling fans does not make a good electrical generator. It is what is known as an AC (Alternating Current) Shaded-Pole Motor, a type of induction motor. An induction motor resembles a rotating transformer, because the stator (stationary part) is essentially the primary side of the transformer and the rotor (rotating part) is the secondary side. There are no brushes, and no direct electrical connection to the rotor windings. More specifically, these motors are often referred to as "squirrel cage" motors. Squirrel-cage motors have a relatively heavy winding made up of solid bars, usually aluminum or copper, joined at the ends of the rotor. Currents induced into this winding provide the rotor magnetic field. The alternating electromagnetic fields created by the current flowing in the stator windings induce the current into the rotor windings. It is the interaction between the rotor and stator fields that cause the motor to turn. Since power for the rotor is a result of the power fed to the stator, and there is no actual physical electrical connection between the two components, if no current is present when the motor is at rest, none will be produced if it is mechanically driven in an attempt to use it as a generator.
What is the result of sludge in a refrigeration system?
Sludge in refrigeration is a combination of water, acid and oil, normally this combination will eat the varnish on the windings of the compressor and short it out.
Should my dogs glucose be retested to see if first result was valid before starting him on insulin?
probably i might be wrong
As a result or as the result?
it should be as a result
The joules for biphasic defibrillator cardioversion?
The starting joules should be 100-120. This will generally result in 90% first shock success in patients with persistent A-Fib.
Should escort zx2 temperature gauge move to middle when first starting?
Do all the gauges do this? If so, then that's the result of an ECM self test, and is normal.
How do you wire a 12 lead motor in star delta?
This is a 3-phase, dual-voltage motor. The 12 leads represent six different windings. For the higher voltage, pairs of windings are connected in series, then the three resulting pairs are connected into a delta configuration to tie to the power source. For the lower voltage, the pairs of windings are instead connected in parallel before combining them into the delta configuration. The windings MUST be combined in the proper order AND in the correct phase for it to work. Mistakes result in great quantities of smoke being released! Each of the leads should have a label, such as T1, T2, T3, etc. It will be either an adhesive label or sometimes printed in ink right on the wire. There is no standard labeling scheme, so each manufacturer always shows the connections for each voltage on the motor nameplate. There is no real way to guess at this, if the nameplate is missing contact the manufacturer for a diagram.
When are fsc-part 1 exams starting?
fsc part 1 result
Would loose spark plugs result in trouble starting the car?
Loose spark plugs would result in a loss of compression. This would make starting difficult and if the engine ran at all it would do so badly.
When will be the 12 result date should be announced?
cbse 2009 result on 24may09
State the important difference between a transformer and induction motor?
A transformer uses a varying magnetic field to induce a voltage in another winding, often changing the voltage to match the requirements of the load.A motor uses a varying magnetic field in induce a torque in the armature, making it turn, converting electrical energy into mechanical energy. In the case of an induction motor, the "windings" in the armature are built in as "single turn shorted secondary windings", rather than windings connected via slip rings or commutators, but the end result is the same - opposing and attracting magnetic fields cause the armature to rotate.
What affect does a changing magnetic field strength have on an ac generator power output?
By increasing the field current (current flowing through the rotor windings), the magnetic field generated by these windings will increase. This increased magnetic field will result in a larger current flow in the stator windings (the output of the generator). This in turn causes a larger pull against the rotation of the rotor, causing it to slow down. The governor will then kick in, allowing more steam/ power to the prime mover to keep speed steady. Assuming all is working correctly, the output power will increase as the magnetic field is increased (to a limit).
What should be result of adsorption acetic acid on charcoal?
the result should be an isotherm showing adsorbtion. most likely langmuir isotherm.
