Dynamic Braking in Variable Frequency Drives(VFD)
Dynamic Braking in VFD is a technique used to safely stop high-inertia loads by dissipating excess energy through braking resistors. Variable Frequency Drives (VFDs) are
Machines
An electrical machine converts mechanical energy into electrical energy or vice versa. The transformer is also an electrical machine which transform the voltage without changing the frequency. We will discuss about the;
- DC Motor
- DC generator
- Induction Motor
- Transformer
- Electrical drives
- Alternator or synchronous generator
Current Transformer Secondary Grounding
Current transformer (CT) secondary grounding is essential for safety, relay accuracy, and avoiding equipment damage. This article explains why CT secondary is grounded, how CT
Transformer Magnetizing Inrush Current
When energizing a power transformer, the transformer draws a magnetizing current. The magnitude of the magnetizing current is several times higher than the rated current
IR Compensation in DC Drive
IR compensation is an essential feature in DC drives and VFD to ensure speed regulation, especially when tachometer feedback is unavailable. The following sections explain
Copper Loss in Transformer – Explanation, Formula & Reduction Methods
The copper loss in the transformer is equal to the I2R loss. The copper loss is very important for the calculation of the transformer efficiency.
Harmonics in Induction Motor – Causes, Problems & Solutions
Harmonics in induction motors adversely affects motor performance, leading to temperature rise and increased losses, decreased torque, and noise problems.In VFD-fed systems, harmonics distort waveforms
No Load Losses of Transformer – Formula & Core Loss
Transformers, even when not supplying any load, consume power—this is known as no-load loss or core loss. These losses occur as soon as the transformer
Starting Torque Of DC Motor
What is Starting Torque of a DC Motor? The starting torque of a DC motor is the maximum torque that a motor can deliver to
Accuracy Class Of Current Transformer
The accuracy class of a CT refers to the permissible error limits of the CT over a specified range of conditions. It ensures that the
Magnetization Curve of CT
The magnetization curve of the current transformer shows the relationship between the secondary excitation current and secondary excitation voltage. The equivalent circuit diagram of the