Voltage differential negative feedback circuit

Description: After integrating the negative feedback circuit, the adjustment object and inertial measurement feedback link are susceptible to oscillations. To address this, a voltage differential or speed differential circuit is employed to minimize or eliminate these oscillations, serving as a dynamic correction mechanism. The circuit, as shown in FIG 16-34, removes the potentiometer RPi motor speed to reflect voltage changes. The RP2, designated as the voltage input terminal of the differential transistor circuit, is positioned away from the VT amplifier, thereby modifying the thyristor conduction angle to reduce variations in electric machine speed.

In the described circuit, the integration of a negative feedback mechanism is crucial for stabilizing the system. The feedback loop helps maintain the desired performance by continuously adjusting the output based on the measured input. However, the presence of oscillations indicates that the system may be overly sensitive or improperly tuned, necessitating the inclusion of a voltage differential or speed differential circuit.

The voltage differential circuit operates by comparing the input voltage levels and generating a corresponding output that mitigates the oscillations. This is achieved through a differential amplifier configuration that amplifies the difference between the two input signals, allowing for precise control over the output. The use of a thyristor in this configuration provides a means to adjust the conduction angle, which directly influences the power delivered to the electric machine. By controlling the conduction angle, the circuit can effectively smooth out fluctuations in speed, leading to a more stable operation.

The removal of the potentiometer RPi from the motor speed feedback path is a significant modification. This change ensures that the feedback loop is not influenced by variable resistance, which can introduce additional noise and instability into the system. Instead, the voltage input terminal RP2 is utilized to provide a more stable reference point for the differential circuit, enhancing the overall performance of the feedback loop.

In summary, the implementation of a voltage differential or speed differential circuit in conjunction with a negative feedback mechanism is an effective strategy for reducing oscillations in electric machine speed control. This approach not only stabilizes the system but also improves the responsiveness and accuracy of the motor control, ensuring efficient operation across varying load conditions.After adding the negative feedback circuit, since the adjustment object and inertial measurement feedback link, prone to oscillation. To this end the use of electric voltage di fferential or speed differential circuit to reduce or eliminate oscillations that act as dynamic correction. Circuit aULk] FIG 16-34. Remove from the potentiometer RPi motor speed to reflect changes in voltage, the RP2, group C as a voltage input terminal of the differential transistor circuit away VT amplifier, thereby changing the thyristor conduction angle, to reduce the electric machine speed changes.