What are the three major capacitive functions of induction cooker?

1. Coupling: The capacitance used in the coupling circuit is called the coupling capacitance.

This type of capacitive circuit is widely used in resistor-capacitive coupling amplifiers and other capacitive coupling circuits to act as a direct flow and AC block.

2. Filtering: used in filter circuits.

The capacitor in is called the filter capacitor.

This capacitor circuit is used in power supply filtering and various filter circuits, and the filter capacitor removes the signal in a certain frequency band from the total signal.

3. Decoupling: The capacitor used in the decoupling circuit is called the decoupling capacitor, which is used in the DC voltage supply circuit of the multi-stage amplifier, and the decoupling capacitor eliminates the harmful low-frequency cross-connection between each stage of the amplifier.

1: Anti-interference capacitance. The function of the capacitor is to prevent the high-frequency interference generated when the induction cooker is working into the mains power grid and affect other electrical appliances. The capacitor is generally 2UF, which is connected between the mains 220V, and the maximum withstand voltage is 275V.

2: Filter capacitor, the function of the capacitor is to turn the rectified pulsating DC into a smooth DC voltage. It is directly connected to the full-bridge rectification, generally 4UF--5UF.

3: Resonant capacitor, its function is to resonate with the parallel plus ** circle to produce high-frequency alternating current, usually, the maximum withstand voltage is generally indicated in the physical object.

I just repaired a Tosheia C18 induction cooker, but the 5UF capacitor is broken and not heated.

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What are the three major capacitors of induction cooker? What do they do? Master to share with everyone.

Reply 2 So how much is the voltage of the resonant capacitor and the interference capacitor when it works normally? What happens if the voltage is low?

1. It is used for high-voltage sampling at both ends of the power supply and gate control tube, and is sent to the comparator for comparison to protect the circuit.

2. Use the digital meter 20UF file to measure the large capacitance such as UF, and the 2UF file to measure the small capacitance.

3. The filter capacitor not only makes the DC output of the power supply stable, reduces the influence of alternating ripple on the electronic circuit, but also absorbs the current fluctuation generated during the working process of the electronic circuit and the interference through the AC power supply, so that the working performance of the electronic circuit is more stable.

The capacitance of 5UF is used for 300V filtering and coil disc resonance.

The main function of the 5UF capacitor of the induction cooker is not to filter the 300V main power supply, the filtering of the 300V main power supply of the induction cooker is completed by the inductor, and the 5UF capacitor is used to provide reverse unloading for the LC resonant circuit.

Many people think that the 2UF capacitor is anti-interference, but in fact, the original intention of this capacitor setting is to correct the power factor.

Function: Charge and discharge with the ** ring to generate 15 to 30kz oscillation pulse.

1. Resonant capacitance: In circuits containing capacitors and inductors, if the capacitors and inductors are connected in parallel, it may appear in a small period of time: the voltage of the capacitor gradually increases, while the current gradually decreases; At the same time, the current of the inductor gradually increases, and the voltage of the inductor gradually decreases.

2. The capacitor and inductor are connected in parallel, the capacitor is discharged, the inductor begins to have a reverse recoil current, and the inductor is charged; When the voltage of the inductor reaches its maximum, the capacitor is discharged, and then the inductor begins to discharge, and the capacitor begins to charge, and this reciprocating operation is called resonance. In this process, the inductor is constantly charged and discharged, so electromagnetic waves are generated.

For judging the quality of the capacitance, it is recommended to use a pointer compound multimeter, or you can use the capacitance measurement file of a digital meter. If you use an analog multimeter, generally use the R 1k file, and connect the pen to the two poles of the capacitor. At this point, the multimeter needle will swing and then slowly return to or near zero.

It is good to make such capacitors. The larger the capacitor's capacity, the longer the charging time and the slower the pointer swings in the 00 direction. If the pointer does not move and the resistance value is rarely displayed and does not move, it is definitely bad.

For the test of this capacitor, the most direct and simple way: directly connect it with 220V alternating current, you can connect one pole first, and touch the other capacitor foot with another power cord, if there is an obvious small spark when touching, you can be sure that this capacitor is charged, that is to say, this capacitor is not broken.

Regardless of how many Wei's, use (2k) to block the measurement, regardless of the positive and negative poles, the measured value is from small to large and then back to small, back to 0, the more the maximum value of the micro-method, the same modulation,. If you don't have power, you can also check the power tube, 12A, and a large resistorYou give it a try, I hope it helps you.

The resonant capacitor and the 5 micromethod resonant capacitor are related to the burning of IGBT and not heating, and the 2 micromethod anti-interference capacitance is related to the gap heating. Since your induction cooker has not burned the insurance, then measure the two working voltages of 5V and 18V first, if not, the primary power supply is faulty, the voltage transformer, the power supply chip, etc., depending on what kind of circuit you are.

Use a pointer meter to measure the phenomenon is obvious and easy to judge When measuring separately, make sure that only the capacitance is measured.

A digital multimeter can only judge whether the capacitor is short-circuited or open-circuited, but cannot judge the capacitance of the capacitor. Please use a capacitance meter or a digital multimeter with a capacitance file.

If you don't see anything wrong from the outside (including the fuse), then the cooker has a soft failure, the most common being that it does not vibrate. Capacitor short circuits, rectifier bridge breakdown, and switch tube damage will generally burn out the fuse.

When the indicator light is on. Just replace the 5 microcapacitors.

1. Coupling: The capacitance used in the coupling circuit is called the coupling capacitor, and the capacitance circuit is widely used in the resistor-capacitance coupling amplifier and other capacitive coupling circuits to play the role of blocking the DC flow and AC.

2. Filtering: The capacitor used in the filter circuit is called the filter capacitor, which is used in the power supply filter and various filter circuits, and the filter capacitor removes the signal in a certain punch band from the total signal.

3. Decoupling Tongpei: The capacitor used in the decoupling circuit is called the decoupling capacitor, which is used in the DC voltage supply circuit of the multi-stage amplifier, and the decoupling capacitor eliminates the harmful low-frequency cross-connection between each stage of the amplifier.

The three major causes of capacitor damage in induction cookers mainly include the following three aspects:

1.Capacitance aging: A capacitor is a device that stores electrical charge, and capacitance aging or damage may occur if it is operated for a long time or if it is used for a long time beyond its design life. The aging capacitor will cause the induction cooker to work unstable, and may even cause dangers such as **.

2.Overcurrent: When the induction cooker is running, the capacitor may be affected by the overcurrent.

This overcurrent can come from a fault in the internal circuit of the induction cooker or fluctuations in the external power supply, etc. When a capacitor is subjected to an overcurrent, its capacitance value may decrease or be completely damaged by the air.

3.Overheating: Capacitors operating in high-temperature environments are prone to overheating.

This is because the rapid charge inside the capacitor causes the capacitor to heat up, which is also exacerbated by a high temperature environment. Overheating can lead to volatilization and leakage of the electrolyte inside the capacitor, which ultimately leads to capacitor failure.

Therefore, in order to avoid damage to the capacitor, it is recommended that the user should perform regular maintenance on the induction cooker. In addition, you should also choose a good quality induction cooker product to avoid capacitor damage caused by internal faults in the appliance.

The electric field energy in the capacitor and the magnetic field energy in the inductor are converted to each other, and the increase and decrease are completely compensated. The sum of the electric and magnetic field energy remains the same at all times, and the power supply does not have to convert energy back and forth with the capacitor or inductor, but only needs to supply the electrical energy consumed by the resistance in the circuit. In an AC circuit with a resistor R, an inductor L, and a capacitor C element, the voltage at each end of the circuit is generally different from the current phase in it.

If you adjust the parameters or supply frequency of the circuit elements (L or C) so that they are in the same phase, the entire circuit appears to be purely resistive. The circuit reaching this state is called resonance. In the resonant state, the total impedance of the circuit reaches an extreme value or an approximate extreme value.

The purpose of studying resonance is to understand this objective phenomenon and make full use of the characteristics of resonance in science and applied technology, and at the same time to prevent the harm caused by it.

It is charged and discharged with a ** ring to produce an oscillation pulse of 15---30kz