1. Relationship between capacitor loss and frequency. The loss of polar dielectric capacitors is determined by the dielectric and auxiliary media in the range of low and medium frequency. In general, the loss of conductance occurs in the range of low frequency. In the high frequency range, the loss

Capacitance. The capacitance of a capacitor is a parameter representing the capacity of the capacitor to store charges, which is numerically equal to the ratio of the charge quantity Q stored on the plate to the voltage U added on the plate. Capacity frequency characteristic. The dielectric constant

1. In the situation that surge current is formed repeatedly, the principle that the maximum instantaneous value of surge current and surge energy can not exceed the characteristic of pulse duration after varistor. 2. The varistor is not close to the heating and combustible device. It is suggested th

1. Whether the varistor is extruded or not, the voltage of the varistor decreases obviously until it is zero; 2. Insufficient voltage resistance; 3. Transient overvoltage damage; 4. The number of overvoltage protection; 5. The surge voltage is too large, which is higher than the absorbed power; 6. A

In the single-phase motor, another method of producing rotating magnetic field is named 'Shaded Pole ', also be named 'Single-phase Shaded Pole Motor'. This kind of motor stator is made a type of convex pole, two polar and four poles. There is a small slot which divide the pole into two parts in t

3, capacitor selections in switching power supply need to know the characteristic of capacitance itself. In switching power supply design, the highest frequency capacitance is ceramic capacitor electrolytic capacitor and tantalum capacitor. It needs to understand their characteristic differences to

1.Understanding of capacitance types. Approximate understanding of capacitance types helps to quickly filter capacitor types when selecting capacitance. There are many kinds of capacitors according to the structure situation according to the structure situation which includes ceramic capacitor tanta

Capacitance is used for phase separation so as to make current near 90゜ phase differences between the two groups so as to generate rotating magnetic field. In three phase electric currents, there is phase difference between each phase and no phase difference. Single phase motors generally have two w

Generally, capacitance of a single phase motor is designed according to motor power, such as 1 kW dual value capacitance motor starting capacitance between 100uf and 200uf capacity.Operating capacitance is about 30uf. Single-phase motor is usually referred to as single phase AC power supply (AC220V

In order to meet the trend of miniaturization large capacity high reliability and low cost of electronic machine. Multilayer chip capacitor also develops rapidly: variety increases ceaselessly volume shrinks ceaselessly performance unceasingly improve technology unceasing progress material constantl