Phase-sensitive rectifier circuit
The described circuit involves a three-phase winding system where the transmitter (FZ) and receiver (SZ) are integral components. The transmitter functions by generating a magnetic field, while the receiver measures the resultant output voltage across the stator windings. This configuration allows for the detection of angular displacement, which is critical for applications requiring precise positioning or speed control.
The system operates on a 110V AC supply, ensuring that the windings are energized adequately for optimal performance. The field winding is responsible for establishing the magnetic field necessary for the functioning of the transmitter. The early start angle is a crucial parameter that determines the initial position of the rotor, influencing the overall system response.
The output voltage at the stator windings is a direct reflection of the rotor's angular position. When the system is in equilibrium, the output voltage stabilizes at zero, indicating that the rotor is correctly positioned. However, any deviation from this position results in a voltage output that signifies an error angle. This feedback mechanism is vital for maintaining accurate control and ensuring the system operates within specified parameters.
The inclusion of a single-phase full-wave phase-sensitive rectifier is essential for converting the AC signal produced by the windings into a usable DC signal. This rectifier operates by allowing current to flow in one direction, effectively smoothing out the variations in the AC signal. The two rectifying components within the circuit work alternately, ensuring continuous output while maintaining the necessary voltage levels across the load.
The resistance of 5.1 kΩ serves to limit the current flowing through the circuit, providing a stable output voltage. The adjustment potentiometer RP1 is employed to fine-tune the balance of the circuit, ensuring that the output voltage remains within acceptable limits. Subsequently, the output from the rectifier is processed through another potentiometer, RP2, which controls the input to the operational amplifier (ST). This amplifier is responsible for further boosting the signal, enhancing the system's ability to detect and respond to changes in angular displacement accurately.
Overall, this circuit design exemplifies a sophisticated approach to measuring angular displacement in a three-phase system, incorporating feedback mechanisms and signal processing elements to achieve precise control and reliability in operation.Transmitter (FZ) winding and a receiver (sz) correspond to the three-phase windings connected, 110V AC voltage supplied to the transmission field winding, early start angle Qing, receiver output voltage at both ends of the stator windings and phase reflect the transmitter rotor angular displacement delivery that reflect the transmitter between the magnitude and direction of the error angle. At equilibrium, the output voltage is zero, otherwise, an error occurs, a voltage signal output. The picture shows the single-phase full-wave phase-sensitive rectifier. Two work alternately, respectively, in the resistance 5.lkfl voltage output, RP1 used to adjust the balance.
AC rectifier into a DC signal, the speed loop RP2 sent to the operational amplifier (ST) input amplification,
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