Study Materials
EXPT-7
AIM OF THE EXPERIMENT:
To study the characteristics of a Synchro Transmitter Receiver pair and use these as torque-synchro and angular error detector.
APPARATUS REQUIRED: SL.NO. | NAME OF THE APPARATUS | SPECIFICATION | QUANTITY | 1 | Sychro transmitter and receiver module | | 1 | 2 | Patch chords | | As required |
CIRCUIT DIAGRAM:
THEORY:
A synchro device, whether transmitter or receiver or control transformer, consists of a stator and a rotor. The stator consists of three windings with their axes 120° apart, connected in star. The phase in these windings is taken out as S1, S2 and S3. The rotor consists of a laminated iron core carrying a single winding at end of which R1 and R2 are brought out to slip-rings. VR(t) = VR sin(ωct)
The stator terminal voltages at an arbitrary angle θ may be written as Vs1s2 =√3 K VR sin (θ + 240°) sin(ωct) Vs2s3 = √3 3K VR sin (θ + 120°) sin(ωct) Vs3s1 =√3 K VR sin (θ) sin(ωct) Where, K is a constant.
TORQUE SYNCHRO SYSTEM
A torque transmitter (TX) and a torque receiver (TR) make up a simple torque-synchro system. Basically, the electrical construction of synchro transmitters and receivers is similar, but their intended functions are different. The rotor of a synchro transmitter is usually geared to a manual or mechanical input. This gearing may drive a visual indicator showing the value or quantity being transmitted. The rotor of the receiver synchronizes itself electrically with the position of the rotor of the transmitter and thus responds to the quantity being transmitted.
CONTROL TRANSFORMER
A controltransformer is a device used to transform or "step down" a high main circuit voltage to a lower voltage which is then used to operate the control or switching components of the main circuit. These devices are commonly used in industrial starter circuits where the main circuit voltage is not suitable for use in the control circuit and where a separate control circuit feed
AIM OF THE EXPERIMENT:
To study the characteristics of a Synchro Transmitter Receiver pair and use these as torque-synchro and angular error detector.
APPARATUS REQUIRED: SL.NO. | NAME OF THE APPARATUS | SPECIFICATION | QUANTITY | 1 | Sychro transmitter and receiver module | | 1 | 2 | Patch chords | | As required |
CIRCUIT DIAGRAM:
THEORY:
A synchro device, whether transmitter or receiver or control transformer, consists of a stator and a rotor. The stator consists of three windings with their axes 120° apart, connected in star. The phase in these windings is taken out as S1, S2 and S3. The rotor consists of a laminated iron core carrying a single winding at end of which R1 and R2 are brought out to slip-rings. VR(t) = VR sin(ωct)
The stator terminal voltages at an arbitrary angle θ may be written as Vs1s2 =√3 K VR sin (θ + 240°) sin(ωct) Vs2s3 = √3 3K VR sin (θ + 120°) sin(ωct) Vs3s1 =√3 K VR sin (θ) sin(ωct) Where, K is a constant.
TORQUE SYNCHRO SYSTEM
A torque transmitter (TX) and a torque receiver (TR) make up a simple torque-synchro system. Basically, the electrical construction of synchro transmitters and receivers is similar, but their intended functions are different. The rotor of a synchro transmitter is usually geared to a manual or mechanical input. This gearing may drive a visual indicator showing the value or quantity being transmitted. The rotor of the receiver synchronizes itself electrically with the position of the rotor of the transmitter and thus responds to the quantity being transmitted.
CONTROL TRANSFORMER
A controltransformer is a device used to transform or "step down" a high main circuit voltage to a lower voltage which is then used to operate the control or switching components of the main circuit. These devices are commonly used in industrial starter circuits where the main circuit voltage is not suitable for use in the control circuit and where a separate control circuit feed