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Any transformer there is leakage inductance, but the leakage inductance of the SMPS transformers on the switching power supply performance indicators is particularly important. Due to the existence of switching transformer leakage inductance, when the control switch off the moment will produce back electromotive force, easy to switch the device over-voltage breakdown; leakage inductance and the circuit can be…Continue
Posted on March 3, 2017 at 12:45am
1. In close to the maximum input voltage when the PFC inductors began to ring, listen to the sound frequency at 100HZ; this situation is generally self-supply winding voltage amplitude is low, reaching ZCD feet less than 1.4V (L6562A), resulting in MOS tube is not open , After this period of time, only to open, so there will be 100HZ sound, as shown in the picture, increase the number of self-power cycle can be.
Posted on March 2, 2017 at 2:10am
1, what is the chip power inductor of power inductors manufacturers
In the placement technology is mainly divided into active components and passive components; and chip power inductors that are one of the passive components; can be divided into two kinds of plug-in and patch; the so-called chip power Inductance; is the ability to produce power at the same time apply to a surface mount of a component.
Posted on February 14, 2017 at 1:31am
rogowski coils current sensor from the Roche coil, integrator and BNC line, as shown in Figure 1, the coil is used by the current signal sampling, the integrator for current sampling after the integration of the output voltage measurement signal, BNC line for the integrator output Connection to measuring instruments.
Coil length: 60cm
Input / output: 1…
Posted on January 13, 2017 at 2:35am