How is resonance generated? How to eliminate?

The frequencies are the same, just change the frequency of one of them.

My speaker is an Edifier E1100's. In fact, the sound quality is quite good. However, when some frequencies are too low, the subwoofer resonance will come out. Very unpleasant.

Resonance is the simple harmonic vibration of physics, the vibration of an object under the action of a restoring force that is proportional to the displacement from the equilibrium position and always points to the equilibrium position. The kinetic equation is f=-kx.

The phenomenon of resonance is that the current increases and the voltage decreases, the closer to the resonance center, the ammeter, voltmeter, and power meter rotate quickly, but the difference with the short circuit is that there will be no zero sequence.

In physics, there is a concept called resonance: when the frequency of the driving force is equal to the natural frequency of the system, the amplitude of the forced vibration of the system is the largest, and this phenomenon is called resonance. The resonance in the circuit actually means the same thing:

When the frequency of the excitation of the circuit is equal to the natural frequency of the circuit, the amplitude of the electromagnetic oscillation of the circuit will also reach its peak. In fact, resonance and resonance express the same phenomenon. This phenomenon, which has the same substance, is called differently in different fields.

Radios take advantage of the phenomenon of resonance. When you turn the knob of the radio, you are changing the natural frequency of the circuit inside. At a certain point, the frequency of the circuit is equal to the frequency of electromagnetic waves that are not visible in the air, so they resonate.

Distant voices came from the radio. This sound is the product of resonance.

Elimination method: If it is a capacitive circuit, a capacitor can be eliminated by connecting it in parallel in the circuit.

If it is an inductive circuit, an inductive coil is used to connect it in parallel in the circuit, so that the inductive reactance and capacitive reactance of the circuit are not equal and resonance is generated.

Series or parallel resonance will produce a voltage several times higher than the power supply, which is applied to the capacitors, transformers, circuit breakers and other equipment in the circuit, causing insulation damage to high-voltage electrical equipment. In the case that the fuse is not blown in time, it will cause the voltage transformer to inject oil, the winding to burn and even **.

Overvoltages caused by resonance can also lead to damage to zinc oxide arresters. If the DC voltage of the zinc oxide arrester is low, it will eventually be damaged by thermal collapse if the DC voltage of the gapless zinc oxide arrester is low and acts continuously under the action of overvoltage.

In the case that the voltage transformer fuse cannot be fused in time, the secondary voltage of the voltage transformer will rise, and the insulation of the secondary relay protection equipment and measuring instrument will be damaged or the relay protection equipment will be misoperated.

When the fundamental wave is resonant, the illusory grounding phenomenon occurs, which is easy to cause the misjudgment of the personnel on duty, which is manifested as the two-phase voltage increases, the one-phase voltage decreases, and the line voltage is normal, and the phenomenon is the same as that of single-phase grounding.

The saturation of the core of the voltage transformer during resonance will increase the ratio error and affect the measurement accuracy.

Harmonic resonance causes the harmonic loss of the power grid to increase.

The resonance that occurs in the parallel circuit of inductor L and capacitor C is called parallel resonance When parallel resonance occurs in the power line, the branch current often greatly exceeds the total current of the circuit, resulting in the fuse blowing, the switch tripping or the accident of burning the electrical equipment. Therefore, resonance should be avoided in the power line.

The resonant frequency is known, and it is tuned to that frequency. I don't know the resonant frequency, so I adjusted it experimentally. The input excitation amplitude does not change, only its frequency is changed, and the resonance is reached when the system response is maximum.

Resonance:

Resonance is also known as "resonance". The amplitude of the oscillation system increases sharply when the frequency of the external force is the same or very close to the natural oscillation frequency of the system under the action of periodic external forces. The frequency at which resonance is generated is called "resonant frequency".

In electrotechnology, the resonance phenomenon of an oscillating circuit. The resonance of the inductor and the capacitor series circuit is called "series resonance", or "voltage resonance"; The resonance of the two parallel circuits is called "parallel resonance", or "current resonance".

When series resonance occurs, the current is greatest in the circuit.

When resonant in parallel, the current in the circuit is minimal.

What is the function of the capacitors connected in series and parallel to the induction coil in the IF furnace?

The circuit in series with the coil is a resonant circuit, in the resistor, capacitor, inductance series circuit, the power supply, voltage, current in phase phenomenon, called series resonance, its characteristics are: the circuit is pure resistance, the power supply, voltage and current are in the same phase, reactance x is equal to 0, impedance z is equal to resistance r, at this time the impedance of the circuit is the smallest, the current is the largest, and the inductance and capacitance may produce a high voltage many times greater than the power supply voltage, so series resonance is also called voltage resonance.