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What are the common DC stabilized power supply capacitors? And its detailed introduction

What are the common DC stabilized power supply capacitors? And its detailed introduction

  • Categories:Industry News
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  • Time of issue:2021-02-08
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(Summary description)The so-called capacitor is an electronic component that contains and releases electric charge. The basic functional principle of a capacitor is charging and discharging, and of course it also has functions such as rectification and oscillation. In addition, the structure of the capacitor is very simple, and it is mainly composed of two positive electricity*, negative electricity* and an insulating medium arranged between them. Therefore, the type of capacitor is mainly determined by electricity* and insulating medium. It is commonly used in DC stabilized power supply capacitors. What? And its detailed introduction.

What are the common DC stabilized power supply capacitors? And its detailed introduction

(Summary description)The so-called capacitor is an electronic component that contains and releases electric charge. The basic functional principle of a capacitor is charging and discharging, and of course it also has functions such as rectification and oscillation. In addition, the structure of the capacitor is very simple, and it is mainly composed of two positive electricity*, negative electricity* and an insulating medium arranged between them. Therefore, the type of capacitor is mainly determined by electricity* and insulating medium. It is commonly used in DC stabilized power supply capacitors. What? And its detailed introduction.

  • Categories:Industry News
  • Author:
  • Origin:
  • Time of issue:2021-02-08
  • Views:0
Information

The so-called capacitor is an electronic component that contains and releases electric charge. The basic functional principle of a capacitor is charging and discharging, and of course it also has functions such as rectification and oscillation. In addition, the structure of the capacitor is very simple, and it is mainly composed of two positive electricity*, negative electricity* and an insulating medium arranged between them. Therefore, the type of capacitor is mainly determined by electricity* and insulating medium. It is commonly used in DC stabilized power supply capacitors. What? And its detailed introduction.

1. Filter capacitor: By using a filter to remove unnecessary AC components, the DC power supply that is connected between the positive and negative DC voltage* can be smoothed. Usually large-capacity electrolytic capacitors are used, and they are also used for regulated DC power supplies. Other types of small capacitors are connected in parallel with the circuit to avoid high-frequency alternating current.

2. Decoupling capacitor: connected in parallel between the positive and negative * of the power supply of the amplified DC power supply circuit to prevent the parasitic oscillation caused by the positive feedback caused by the internal resistance of the power supply.

3. Bypass capacitor: DC stabilized power supply circuit for AC and DC signals. Either connect a capacitor in parallel with a resistor, or connect a specific point in the DC stabilized power supply circuit to a set AC signal with a common potential, or in the case of using a pulse signal, the method to attenuate the AC signal component is: The voltage drops to avoid resistance.

4. Coupling capacitor: In the DC stabilized power supply circuit with AC signal processing, the DC power is separated to connect the signal source and the DC stabilized power supply circuit after signal processing, or as a stage between two amplifiers and AC signals or pulses The indirect connection allows the signal to pass through the DC operating point of the DC stabilized power supply circuit of the preamplifier and postamplifier, so they will not affect each other.


5. Tuning capacitor: connect to both ends of the oscillation coil of the resonant DC stabilized power supply circuit and select the oscillation frequency.

6. Pad capacitance: auxiliary capacitor, connected in series with the main capacitor of the resonant DC stabilized power supply circuit. When setting, the frequency range of the vibration signal is narrowed, and the vibration frequency at the low frequency end is significantly higher.

DC stabilized power supply circuit of crystal oscillator and equivalent DC stabilized power supply circuit

7. Compensation capacitor: auxiliary capacitor, connected in parallel with the main capacitor of the resonant DC stabilized power supply circuit. By adjusting the capacitor, the frequency range of the vibration signal can be expanded.


8. Neutralization capacitor: Neutralization capacitor: connected in parallel between the base * and emitter * of the transistor amplifier, it forms a negative feedback network, and is a self-oscillation caused by the capacitance between the transistors.

9. Frequency stabilizing capacitor: It plays a role in stabilizing the oscillation frequency in the DC stabilized power supply circuit.

10. Time capacitance: a capacitor connected in series with the resistor R of the DC stabilized DC power supply circuit to determine the length of charging and discharging time.

11. Accelerating capacitor: connected to a DC stabilized power supply circuit with oscillator feedback to speed up the positive feedback process and increase the amplitude of the oscillation signal.

12. Shorten the capacitance: In the DC stabilized UHF tuner power supply circuit, connect capacitors in series to shorten the length of the oscillating inductor.

13. Rod Capacitor: Capacitor 3-point oscillation In the DC stabilized power supply circuit, the capacitor connected in series with the inductance oscillating coil plays a role in eliminating the effect of transistor junction capacitance on frequency stability.


Crabow Oscillator

14. Silver capacitor: Capacitor 3-point oscillation In the regulated DC power supply circuit, the capacitor connected in parallel at both ends of the induction oscillation coil eliminates the effect of the junction capacitance of the transistor and makes the oscillator easier to vibrate.

15. Amplitude stabilization capacitor: used for frequency discriminator to stabilize the amplitude of the output signal.

16. Pre-emphasis capacitor: RC high frequency components are very small. It is recommended to add network capacitors during the processing of audio modulation signals to avoid attenuation and crossover loss.

17. De-emphasis capacitor: In order to restore the original audio signal, an RC capacitor needs to be set in the network to jointly attenuate the high-frequency components and noise generated by the pre-emphasis of the audio signal.

18. Phase shift capacitor: a capacitor used to change the phase of an AC signal.


19. Feedback capacitor: a capacitor connected between the input and output terminals of the amplifier to return the output signal to the input terminal.

20. Downstream current-limiting capacitor: It is connected in series with the AC circuit and uses the capacitive reactance characteristics of the capacitor to limit the AC current relative to the AC current, thereby forming a DC stable power supply circuit with voltage splitting.

21. Flyback capacitor: used in the DC stabilized power supply circuit with line scanning output. The line is connected between the collector * and the emission * of the line output tube to generate high-voltage, sawtooth reverse motion pulses. The dielectric strength is usually more than 1500 volts.

22. S correction capacitor: in series with the deflection coil loop to correct the extended linear distortion at the end of the receiver tube.

23. Bootstrap boost capacitor: use the charge and discharge energy storage characteristics of the capacitor to increase the potential of a certain point in the stabilized power supply circuit, so that the potential at this point is twice the value of the power supply voltage.

24. Bright spot elimination capacitor: installed in the DC stabilized power supply circuit of the video amplifier, used to eliminate the remaining bright spots when the kinescope is turned off.


25. Soft start capacitor: usually connected to the switch base of the switching power supply to prevent excessive surge current or high peak voltage from being added to the switch base when the switch is turned on and damaged.

26. Starting capacitor: It is connected in series with the secondary winding of the single-phase motor to provide the motor with a phase-shifted starting AC voltage. After the motor works normally, the voltage is cut off by the secondary winding.

27. Operating capacitor: It is connected in series with the secondary winding of a single-phase motor to provide phase-shifted alternating current for the secondary winding of the motor. When the motor is working normally, it is connected in series with the secondary winding.

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