When R. China Electric. In the circuit, the reactive part of the complex impedance disappears. In this case, afterwards. The amplitude of the voltage drop circuit on inductors and capacitors is QE. However, their phases are opposite and cancel each other out. In the parallel circuit at R (b in Figure 1), the currents in the capacitive and inductive branches compensate for each other. Contrary to followers. R., Externally equipped with K-rum. The force action is performed by a voltage source, and in a parallel circuit, resonance phenomenon is only achieved when ext. The impact is determined by the current source. Therefore, R. sequentially. This circuit is called voltage R., and in a parallel circuit it is called current R. If a voltage generator is included in the parallel circuit instead of a current generator, the non maximum condition will be satisfied at the resonant frequency, and the phase angle (149.9) between the current and voltage will disappear (j=0), that is, the phase of the current and voltage will change.
In this case, the total resistance of circuit Z (149.12) becomes the minimum, equal to the active resistance R of the circuit, and the current in the circuit is determined by this resistance, taking the maximum value (possible for a given Um). In this case, the voltage drop across the active resistor is equal to the external voltage applied to the circuit (UR=U), while the voltage drop across the capacitor (UC) and inductor (UL) is the same but opposite in phase. This phenomenon is called voltage resonance (series resonance), and the frequency (150.2) is called the resonance frequency.
Due to the Q factor of conventional oscillation circuits being greater than 1, the voltage on both inductors and capacitors exceeds the voltage applied to the circuit. Therefore, the series resonance phenomenon is used in technology to amplify voltage fluctuations at specific frequencies. For example, in the case of resonance between the two ends of a capacitor, a voltage with an amplitude of QUm can be obtained (in this case, Q is the Q factor of the circuit, which may be much higher than Um). This voltage amplification is only possible within a narrow frequency interval near the resonant frequency of the circuit, which makes it possible to select a vibration of a certain frequency from many signals, i.e. tune to the desired wavelength on the radio receiver.
In electronic devices, when the inductive and capacitive components of the system response reach equilibrium, resonance occurs at a specific frequency, causing energy to circulate between the magnetic field of the inductive component and the electric field of the capacitor.
An electronic device composed of capacitors and inductors is called an oscillating circuit. The components of an oscillating circuit can be connected in series or parallel. When resonance is reached, the impedance of the inductor and capacitor connected in series is the smallest, while it is the largest when connected in parallel. The resonance process in oscillating circuits is used to tune components and electrical filters. The frequency of resonance depends on the value (grade) of the element used. Meanwhile, if resonance occurs in unexpected places due to damage, improper design or manufacturing of electronic devices, it may be harmful. This resonance can cause stray noise, signal distortion, and even component damage.