Q 1: - What is LVDT?
A1: - LVDT is the abbreviation of linear variable differential transformer. It is a transducer that converts the voltage into displacement.
Q2: - What is the frequency range of AC applied to the primary winding?
A2: - The ac frequency applied to the primary window can be between 50hz to 20khz.
Q3: - What is the null condition in the LVDT?
A3: - When the nucleus id in its normal (null) position, the flow that joins the two secondary windings are equal and, therefore, equal emfs are induced in them. Thus, in the null position Es1 = Es2. The output voltage E0 is zero at zero.
Quest 4: - What are the advantages of LVDT?
Ans: - The advantage of LVDT: -1.high range
2.friction and electrical insulation
3.immunity of externalities
4. high input and sensitivity
5.low power consumption
Quest 5: - What are the uses of LVDT?
Ans: - 1. LVDT can be used in all applications where the displacement varies from floma Fraction of a millimeter to a few cm to be measured.
2. It can be used as a device to measure strength, weight, and pressure etc.
P6. List the basic component of LVDT?
A6. The components are formed by a primary coil and two secondary coils, spaced symmetrically in a tubular center. Cylindrical box that encloses and protects the coiled winding assembly. A bar-shaped magnetic core that is free to move axially within the wound assembly. It is used for electromagnetic shielding.
Q7 What are the disadvantages?
A7. 1. The displacement is too high to generate voltage.
2. Shielding is necessary for magnetic fields.
3. It is affected by vibrations.
4. It is affected by temperature changes.
Q8. What is the value of the excitation voltage?
A8. The value of the excitation voltage is 5v to 12v.
Q9What is the operating frequency value?
A9 Frequency is approximately 50 Hz to 400 Hz. High displacement is required to generate high voltage * Shielding is required as it is sensitive to the magnetic field. * Transducer performance is affected by vibrations Practice Title 2: Weight measurement with strain gauge bridge.