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Yes, speeds above the rated speed can be achieved using the armature resistance control method in DC motors. By increasing the armature resistance, the voltage drop across the resistance can be manipulated, allowing for higher speeds. However, this approach is limited and can lead to inefficiencies, overheating, and reduced torque at higher speeds. Therefore, while it is possible, it is generally not the most efficient or practical method for achieving high speeds.
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Name the three basic methods that are used to vary the speed of a DC motor?
speed of a dc motor can be varied by mainly two methods:- 1)field control method 2)armature control method further , field control method can be divided in 3 parts:- 1)field rhestat control method---speed variation is acomplished by means of a variable resistance inserted in series with shunt field 2)reluctance control method---by changing the reluctance of magnetic circuit by choosing right material.. 3) field voltage control method-requires variable field voltage supply. and armature control method can be divided in 3 parts :- 1)armature resistance control---variable resisitance connected in series with armature 2)shunted armature control. 3)armature voltage control. ------------mrityunjay pandey (kiit university ,btech 2nd year)
Is the armature resistance substantially the same for every rotational?
The armature resistance in a motor or generator is generally considered to be relatively constant across different rotational speeds, as it primarily depends on the physical properties of the winding material and geometry. However, factors such as temperature changes and the skin effect at high frequencies can cause slight variations in resistance. Overall, while the armature resistance remains consistent under normal operating conditions, it can exhibit minor changes under specific circumstances.
Which speed control method in DC motor gives greatest speed range?
The field control method provides the greatest speed range for a DC motor. By varying the strength of the magnetic field (flux) in the motor, this method allows for a significant adjustment in speed, often exceeding the limits of armature control alone. This technique can achieve both very low and very high speeds, making it highly versatile for various applications. However, it requires careful management to avoid issues such as field weakening, which can lead to instability.
How speed increases when flux decreases in dc shunt motor?
Increasing flux, torque of the dc motor will be increased and speed of the dc motor will be decreased as speed of the dc motor is inversely proportional to that of the flux and the torque of the dc motor is directly proportional to the flux.
Why do you need to control the speed of a DC motor?
The speed of DC motors need to be controlled because that is what the application needs. In some cases, it is to protect the motor or the attached equipment. In toys and robots, you'd want different speeds. Electric cars such as golf carts would need to control the speed of a DC motor so you can easily drive it like driving a car with a gasoline engine. Tape recorder motors contain a flywheel and a governor to regulate their speed so the tape will move at an even and standard rate. If the motor starts to get a little too fast, its contacts inside open up to briefly power down the motor and when it is slow enough, the contacts close again. So this helps to compensate for different amounts of battery charge and for different operating conditions. Record players have a simpler job of regulating their speed since most use alternating current and a simple induction motor. Since the voltage and frequency is constant, no governors are needed. Unless the bearings go bad, the motor will run at that fixed rate.
What are the advantages and disadvantages of armature control method?
The advantages of the armature control method include precise speed control of DC motors, effective torque management, and simplicity in implementation. It allows for smooth acceleration and deceleration, making it suitable for applications requiring fine-tuned performance. However, disadvantages include potential inefficiency at low speeds, increased heating due to armature resistance, and limited applicability to AC motors. Additionally, it may require complex circuitry for larger systems, increasing overall costs.
What are the advantages and disadvantage of flux control method over armature control method?
The flux control method offers the advantage of providing better speed regulation and improved efficiency in DC motors, as it adjusts the field current to control speed without affecting armature current. Additionally, it allows for smooth speed variations over a wide range. However, its disadvantage lies in the limited speed range it can achieve, as excessive flux weakening can lead to instability and reduced torque. In contrast, the armature control method can provide higher speeds but often results in lower efficiency and higher heat generation due to increased armature current.
What are the disadvantages of armature speed control method for a dc motor?
Disadvantages of armature speed control for a DC motor include complexity of control circuitry, increased maintenance due to wear on the brushes and commutator, and limited speed range compared to field control methods. Additionally, armature control can result in lower efficiency and poor performance at low speeds.
Name the three basic methods that are used to vary the speed of a DC motor?
speed of a dc motor can be varied by mainly two methods:- 1)field control method 2)armature control method further , field control method can be divided in 3 parts:- 1)field rhestat control method---speed variation is acomplished by means of a variable resistance inserted in series with shunt field 2)reluctance control method---by changing the reluctance of magnetic circuit by choosing right material.. 3) field voltage control method-requires variable field voltage supply. and armature control method can be divided in 3 parts :- 1)armature resistance control---variable resisitance connected in series with armature 2)shunted armature control. 3)armature voltage control. ------------mrityunjay pandey (kiit university ,btech 2nd year)
Is the armature resistance substantially the same for every rotational?
The armature resistance in a motor or generator is generally considered to be relatively constant across different rotational speeds, as it primarily depends on the physical properties of the winding material and geometry. However, factors such as temperature changes and the skin effect at high frequencies can cause slight variations in resistance. Overall, while the armature resistance remains consistent under normal operating conditions, it can exhibit minor changes under specific circumstances.
Which speed control method in DC motor gives greatest speed range?
The field control method provides the greatest speed range for a DC motor. By varying the strength of the magnetic field (flux) in the motor, this method allows for a significant adjustment in speed, often exceeding the limits of armature control alone. This technique can achieve both very low and very high speeds, making it highly versatile for various applications. However, it requires careful management to avoid issues such as field weakening, which can lead to instability.
How speed increases when flux decreases in dc shunt motor?
Increasing flux, torque of the dc motor will be increased and speed of the dc motor will be decreased as speed of the dc motor is inversely proportional to that of the flux and the torque of the dc motor is directly proportional to the flux.
What is the skiers air resistance?
The air resistance experienced by a skier depends on factors such as speed, body position, and surface area exposed to the wind. Generally, air resistance increases with higher speeds and when the skier adopts a less aerodynamic position. It can affect the skier's speed and control while skiing.
The sleek shape of a bobsled reduces and allows greater speeds?
What is the sleek shape of a bobsled reduces and allows greater speeds
Future scope of dc motor speed control using rf?
The DC motor speed control has a scope of four speeds. The control speeds include; high, medium, low, and off.
What is a resistor block for on a Dodge Caravan?
The resistor block or blower motor resistor is used to control the speed of the blower motor. That is how you get the lower speeds on your air conditioning or heater. The higher the resistance the lower the speed of the motor.
Why do you need to control the speed of a DC motor?
The speed of DC motors need to be controlled because that is what the application needs. In some cases, it is to protect the motor or the attached equipment. In toys and robots, you'd want different speeds. Electric cars such as golf carts would need to control the speed of a DC motor so you can easily drive it like driving a car with a gasoline engine. Tape recorder motors contain a flywheel and a governor to regulate their speed so the tape will move at an even and standard rate. If the motor starts to get a little too fast, its contacts inside open up to briefly power down the motor and when it is slow enough, the contacts close again. So this helps to compensate for different amounts of battery charge and for different operating conditions. Record players have a simpler job of regulating their speed since most use alternating current and a simple induction motor. Since the voltage and frequency is constant, no governors are needed. Unless the bearings go bad, the motor will run at that fixed rate.
