Advantages of Valve Regulated Lead Acid (VRLA) Batteries

Valve Regulated Lead Acid (VRLA) Batteries are sealed maintenance free lead acid batteries. The normal lead acid battery evolve  hydrogen which needs to vented through the cell in order to avoid explosion of the battery. On the other hand, the evolved hydrogen in the VRLA battery is reused in the battery itself. Therefore, no venting … Read more

VRLA Battery – Valve Regulated Lead Acid Battery

vrla sealed battery

A VRLA battery or Valve Regulated Lead Acid Battery is  a sealed battery or maintenance free battery. This is one type of Lead acid rechargeable battery. The VRLA Battery does not require stringent ventilation. Also, we can mount the battery in any orientation. The reduced ventilation requirement is an added advantage of VRLA. The VRLA … Read more

Advantages and Disadvantages of Electric Braking

In this article we shall study about the advantages and disadvantages of Electric Braking. The electric brake is better than a mechanical friction brake in many respects. however, it has  some disadvantages with respect to mechanical brakes. Advantages of Electric Braking The mechanical braking system has brake blocks and brake lining. The mechanical brake functions … Read more

Types of Braking in a DC Motor

types of braking in a dc motor

In this article we shall discuss about the types of  electrical braking in a  DC motor. There are various types of  electrical braking used for DC motor. Electrical braking is preferred  to stop a  DC motor over the mechanical braking because it has many advantages. In electrical breaking, we stop the motor by electrical energy … Read more

What is Plugging or Reverse Current Braking of DC Motor?

plugging of separately excited dc motor with braking resistor

In Plugging or Reverse Current Braking, supply polarity of  armature voltage of  DC motor is reversed to rapid stop the motor. The armature voltage(V) and back EMF (Eb) acts in the same direction during plugging. In plugging motor exerts opposite torque to retard its speed. The application of the plugging is to immediately stop the DC motor or … Read more