In the Wein bridge, an inductance is measured by comparison with a standard variable capacitance.
What is Hay’s Bridge? Theory, Diagram & Derivation
Hay’s Bridge is also used for the measurement of inductance. It uses a standard capacitor in series with a resistance. With this bridge, an inductance having Q greater than 10 can also be measured.
What is Q Meter? Working, Diagram, Derivation & Specifications
Every inductor has a certain amount of resistance, which is undesirable as it causes a power loss. The ratio of inductive reactance to the resistance of the coil is called quality factor or Q factor of the coil. i.e.
\[\text{Q}=\frac{{{\text{X}}_{\text{L}}}}{\text{R}}=\frac{\omega \text{L}}{\text{R}}\]
Special meters are designed to measure Q-factor correctly. These are called Q meters.
What is Schering Bridge? Theory, Diagram & Derivation
Schering Bridge is the most popularly used bridge for measurement of unknown capacitance and dielectric loss occurring in the capacitor. The circuit diagram of the Schering bridge is shown in Fig. 1.
Fig. 1: Schering Bridge.
What is Owen’s Bridge? Theory, Diagram, Derivation & Advantages
Owen’s Bridge bridge is used for measurement of inductance in terms of a standard capacitance. The Fig. 1 shows the circuit diagram. The bridge has the following components.
Fig. 1: Owen’s Bridge
What is Permanent Magnet Synchronous Motor? Working, Construction, Diagram & Applications
High energy permanent magnets made up of rare earth or samarium-cobalt used for exciting the magnetic field of permanent magnet synchronous motors, enable them to be significantly smaller in size and weight. They have better efficiency because of the absence of a rotor winding and the small size of the rotor.
What is Switched Reluctance Motor? Working, Diagram, Construction & Applications
In spite of the presence of torque ripples and higher acoustic noise, Switched Reluctance Motors are used in numerous applications because of their high starting torque, high torque to inertia ratio, high reliability, wide speed range, fast response, ruggedness, and low cost.
What is Synchronous Reluctance Motor? Working, Construction, Diagram & Applications
In this topic, you study Synchronous Reluctance Motor Working, Construction, Diagram & Applications.
Hunting in Synchronous Motor – Meaning & Prevention
When the synchronous motor is loaded, the rotor poles fall back by a certain angle behind the rotating stator poles. This enables the motor to produce the necessary torque to cope up with the load. For synchronous motor operating with fixed excitation, the value of this torque angle is solely decided by the load on the motor.