Dynamics of Electrical Drives

Electric Motor Power Rating

Thermal Model of Motor

Motor Duty Class

DC Motor Drives

Induction Motor Braking

Induction Motor Drives

Types of Braking

Control of Electrical Drives

Synchronous Motor Drives

Stepper Motor Drive

Variable Frequency Drive

Field Oriented Control

**dynamics of electrical drives**is introduced.

We can describe the dynamics of electrical drive easily by the following instant.

Here, J = Polar moment of inertia of motor load

W_{m} = Instantaneous angular velocity

T = Instantaneous value of developed motor torque

T_{1} = Instantaneous value of load torque referred to motor shaft

Now, from the fundamental torque equation -

For drives with constant inertia,

So, the above equation states that the motor torque is balanced by load torque and a dynamic torque J(dω_{m}/dt). This torque component is termed as dynamic torque as it is only present during the transient operations. From this equation, we can determine whether the drive is accelerating or decelerating. Such as during accelerating motor supplies load torque and additional torque component essentially. So, the torque, balancing the **Dynamics of electrical braking** is very helpful.