What gears are used in traction drives?

The main planetary gear set, connected directly to the motor shaft has a sun gear with 25 teeth, dual planets with 20 and 21 teeth (from sun to ring respectively), and a ring gear with 76 teeth.

What is traction gearbox?

The traction drive is a non-gear reduction technology that minimizes vibration and noise. The negligible transmission error makes it the smoothest and most quiet method to me- chanical adjust speed and torque.

How does a traction drive work?

Traction drives work by using normal force to generate usable rotational torque via multi viscosity traction fluids. These fluids while under pressure temporarily become a solid preventing metal to metal contact while also distributing the pressure at the contact patch as well as transferring of torque.

What are the advantages of traction drives?

Advantages of Electric Traction Drives

Due to high starting torque, it is possible to produce high acceleration rates. Electric locomotives require less maintenance compared to other drives. Supply of power to the locomotive is easier through the traction substations.

What are the salient features of traction drives?

Basics of traction motor drive

Which induction motor is used in traction?

Linear Induction Motor

This made the linear induction motors be used in conveyors and trams. These are generally used in the ac traction which provides the three-phase ac supply.

What are the disadvantages of traction?

Why DC series motor is suitable for traction?

DC series motor has develops high torque at low speeds, low torque at high speed, this is the basic requirement of traction unit. Commutating property of series motor is good so we get sparkles commutation. Torque is unaffected by variation in supply voltage. DC Series motor maintenance cost is less.

Why do we use 50Hz supply in electrical traction system?

It uses step down transformer and frequency converters to convert from the high voltages and fixed industrial frequency. The Single phase 25KV at 50Hz is the most commonly used configuration for AC electrification. It is used for heavy haul systems and main line services since it doesn't require frequency conversion.

Are locomotives AC or DC?

Modern AC locomotives tend to have better traction and offer better adhesive to the tracks than earlier models. AC diesel-electric trains are most commonly used for carrying heavier loads. However, DC diesel-electric trains are still very popular as they are relatively cheaper to manufacture.

Why is traction used?

Most often, traction uses devices such as weights and pulleys to put tension on a displaced bone or joint, such as a dislocated shoulder. The tension helps put the joint back in position and keep it still. Traction is also used to keep a group of muscles (such as the neck muscles) stretched to reduce muscle spasms.

What is stability control vs traction control?

Stability control often cuts power and brakes wheels to move the car where a driver is pointing it — with limited success sometimes, but it's better than fighting Mother Nature all by your lonesome. Traction control only limits wheel spin; stability control can maneuver a car.

When two or more motors are used for traction service the method of speed control used will?

When two or more motors are used for traction service, the method of speed control used will be. (a) rheostatic control.

Which motor is not used from the following for traction purpose?

DC shunt motors are not suitable for traction purpose, the reasons are given below: 1. The dc shunt motor is a constant speed motor and its speed-torque characteristic does not meet with the requirements of traction. i.e., the power drawn from supply mains varies directly as the load torque.

Which motor is used in electric traction Mcq?

For electric traction, DC series motors are best suited. DC series motors and AC series motors are very much recommended, as they provide a high starting torque Nowadays three-phase induction motors are also being used.

What is ADC series motor?

A series DC motor connects the armature and field windings in series with a common D.C. power source. The motor speed varies as a non-linear function of load torque and armature current; current is common to both the stator and rotor yielding current squared (I^2) behavior.

What are the 3 types of traction?

What are the 3 types of traction car?

Three types of traction influence the control/or movement of a motor vehicle. They are: Static, rolling (dynamic), and sliding.

Is traction still used?

Although traction was widely used for more than a century, in recent years it has been eclipsed by more state-of-the-art surgical techniques for correcting broken bones. Today, traction is used primarily as a temporary measure until surgery is performed.

What is the difference between ESP and TCS?

How Does ESP Work? ESP operates in conjunction with the Anti-lock Braking System (ABS) and Traction Control System (TCS). ABS is of course designed to maintain traction and enable steering during severe braking by preventing lockup, whereas TCS helps a vehicle's drive wheels maintain traction during acceleration.

What is the difference between ABS and traction control?

The major difference between an ABS and a Traction Control system is that while ABS stops the wheel from spinning while braking, Traction Control stops the wheel from spinning while the vehicle is accelerating.

Does traction control apply brake?

A traction control system is responsible for maintaining the traction (grip) of vehicle tires on slippery surfaces and curves to avoid tire slip when accelerating or de-accelerating. The system does so by either decreasing the power (torque) delivery or applying brakes to the slipping tires.

What are two types of traction?

There are two common types of traction. These include skin traction and skeletal traction.