Identification method and fault alternative method for patch inductive components

The number of applications in the circuit is small in the circuit, only at the output of the low voltage DC control power supply, see its application, and the filter capacitor constitutes a π-shaped filter circuit of the CLC, there is (inhibiting current mutation) to stabilize the output current . Inductive components, composed of single coils, some with magnetic core (large inductance), in units of μH and MH, the flow current value is a few milliamps to several hundred mA. Patch inductors include circular, square and rectangular packages, and color is mostly black. With core inductance (or circular inductance), it is easy to identify from the shape. However, some rectangular inductors, from the shape, more like a patch resistor element. The inverter manufacturer's label of the patch inductance on the board, is labeled L words. The working parameters of the inductor have an inductance, Q value (quality factor), DC resistance, rated current, self-harmonic frequency, etc., the patch emissions volume limit, mostly labeled electricity inductance, other parameters are not labeled, and often Indirect labeling method - The patch inductive body is marked, but most of the entire specification model is mostly inductive information. Identification method: 1) From the outer, such as a magnetic heart or circular inductor, the volume is slightly large, can see the core and coil; 2) Some patch inductors are the same as the patch resistance from the shape, but there is no number with the letter, only a small circle label, meaning inductive components; 3) The element serial number in the circuit tends to be labeled, such as L1, DL1, and the like. 4) An inductance is marked, such as 100. 5) The Ideally inductor AC resistance is large, and the DC resistance is zero. The measured resistance value of the inductor element is extremely small, and the resistance value is nearly zero ohm. From 3), 4), 5), with the observation and measurement (the position and action in the circuit), distinguishing between the component is a patch resistor or a patch inductor, and determines the inductor element. 6) Use a dedicated inductance tester to disengage the component to measure its inductance. Troubleshooting: 1) Remove the model element from the waste circuit board 2) Determine the inductance amount and flow current value, replace it with ordinary belt inductive components, and do a good job 3) By winding, making inductive use, there is a certain difficulty 4) If there is no significant effect on circuit performance, emergency repair can be temporarily short Recommended reading: http://www.elecfans.com/d/811568.html, Read more

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