Dynamic Braking in Variable frequency Drives
Dynamic braking is the method of stopping the motor by dissipation of heat in the resistor. When VFD drives a motor, the motor acts as … Read more
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
According to the ANSI guide, the IEEE standard specifies the current transformer grounding practices. The grounding of the current transformer is critical from the perspective of safety … Read more
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 … Read more
IR Compensation in DC Drive
IR compensation method is used to provide the speed regulation in the DC drive. The DC drive increases the output voltage of the drive to … Read more
Copper Loss In Transformer
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. … Read more
Effects Of Harmonics in Induction Motor
Harmonics in induction motors adversely affects motor performance, leading to temperature rise and increased losses, decreased torque, and noise problems. Due to simplicity in construction … Read more
No Load Losses in Transformer
What are No-Load Losses( Excitation Losses)? Transformer no-load losses occur when the transformer is excited at the rated voltage and frequency, keeping its secondary open … Read more
Starting Torque Of DC Motor
The Starting torque is the maximum torque that a motor can deliver to the mechanical load for its rotation. DC motor is capable of delivering … Read more
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 … Read more
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 … Read more