Which DC motor is preferred for cranes?

Which DC motor is generally preferred for cranes and hoists? Explanation: DC series motor is used where high starting torque is required, thus in cranes and hoists DC series motor is used widely. Torque-speed characteristics of DC series motor suits perfectly to these applications.

Which DC motor is used in cranes?

Wound field DC motors 4 (series, shunt or compound) are used in industrial environments for coil feeding reels in the milling/metalforming, crane hoists, motor-driven cable reels, and elevator hoist motors.

Why is DC series motor used in crane explain it?

The starting torque of the DC series motor is proportional to the square of the armature current. … That is why DC series motor is capable to produce high starting torque, and it is preferred for driving heavy loads. The high inertia loads like cranes need a high starting torque. The DC series motor is used in cranes.

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Which motor is not suitable for crane application?

Squirrel cage induction motor has the problem of low starting torque due to low resistance. Therefore, they are not suitable for applications like crane or lifts. On the other hand, a slip ring induction motor is also similar to the normal Squirrel cage induction motor.

Which type of motor will be preferred if a DC motor is to be selected for lips?

Synchronous motor. Either A or B. Lathes machines requires uniform torque. Hence squirrel cage induction motor or dc shunt motors are preferred.

Which DC motor is generally?

Explanation: DC series motor is used where high starting torque is required, thus in cranes and hoists DC series motor is used widely.

Why is the DC motor preferred over AC motor?

AC motors are generally considered to be more powerful than DC motors because they can generate higher torque by using a more powerful current. However, DC motors are typically more efficient and make better use of their input energy.

What are the advantages of DC series motor?

Advantages of DC Series Motor

  • Dc series motor have good accelerating torque.
  • Dc series motor have a relatively huge starting torques.
  • Dc series motor delivers high torque during an overload.
  • The dc series motor draws less current and power from the source compared to a shunt or compound motor.

What are the applications of a dc series motor?

Application of DC series motor

  • ⇒ DC series motors are used where high starting torque required. …
  • ⇒ DC series motor is used in a vacuum cleaner, traction systems, sewing machines, cranes, air compressors etc.
  • ⇒ DC shunt motors are used where constant speed is needed.
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What is back emf in dc motor?

When the armature of the DC motor rotates under the influence of driving torque, the armature of the conductors moves through a magnetic field inducing an emf in them. The induced emf is in the opposite direction to the applied voltage and is known as the back emf.

Which DC motor is preferred for constant speed?

Explanation: Rotary compressor generally demand constant speed operation throughout the load. Sometimes, DC machines are not able to produce constant speed throughout the process hence, synchronous machine is used. 4.

Which one of the following motor is a 1 φ AC motor?

1. Which one of the following motor is a 1-Φ AC motor? Explanation: Capacitor run motor is a 1-Φ AC motor. The capacitor is used to provide a 90° phase difference between the currents of main and auxiliary winding.

Which drive is used in crane?

Conventional AC operated crane drives use slip ring induction motor whose rotor windings are connected to power resistance in 4 to 5 steps by power contactors. Reversing is done by changing the phase sequence of the stator supply through line contactors. Braking is achieved by plugging.

Which DC motor is used for conveyors?

ElectroCraft’s brush or brushless DC motors and gearmotors provide the power, durability and compact size that is required for distributed control of motorized conveyor sections and diverter systems.

Which type of DC motor is used in conveyors?

Brushless DC Motors & Gear Motors (BLDC Motors) provide high speed stability, energy saving and space saving. Brushless DC motors also allow for stable speed control even with a fluctuating load and offer constant torque over a wide speed range.

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What is difference between brushless DC motor and brushed DC motor?

What is the Difference Between Brushed and Brushless DC Motors? A brushed DC motor uses a configuration of wound wire coils, the armature, acting as a two-pole electromagnet. … A brushless motor, by contrast, utilizes a permanent magnet as its external rotor.