With the development of power devices, the frequency of induction heating power is gradually improved, and there are several stages of intermediate frequency, super audio, high frequency. In the application of the sensing heating power supply, the process such as quenching, welding pipe, welding is required to high-frequency power supply.
In the intermediate frequency power maintenance, the DC wave-wave reactor fault is difficult to determine and process failures. The fault that DC smooth reactors is easy to do:
1. Users arbitrarily adjust the air gap of the reactor and the number of turns, and change the electrical inductance of the reactor, affect the filtering of the reactor, which can make the DC current of the lifting, resulting in the inverse bridge. Stable inverter, failure to burn the inverter gauge tube casually adjust the air gap of the reactor and reduce the number of turns. When the inverter bridge is straight through the short circuit, the code burn crystal gate of the reactor blocking current will change the inductance of the reactor inductance.
2, the reactor coil is loose. If the coil of the reactor is loose, when the electromagnetic force is electromagnetic in the operation, the inductance mutation is easily inverted during light load and small current operation;
3, the reactor coil is not good. Short-circuit or inter-turns, fire discharge causes the electron inductance, rush and strong electromagnetic interference to make the equipment work unstable, and the cause of the coil insulation is not short-circuited. Have:
a. Cooling temperature is too high, causing the insulation of insulation to firing and firing;
b. The reactor coil is loose, between the coil insulating layer and the coil insulating layer, between the coil insulating layer and the core, relative motion friction causes damage to the insulating layer;
C. When the reactor coil is treated, the acid solution penetrates the acid solution into the coil, the acid-liquid corrosion copper tube and generates copper salt to destroy the insulating layer.
The abnormal sound work is unstable after a period of time, mainly the thermal characteristics of the electrical components of the equipment, the medium band can divide the electrical part of the equipment into weak electricity and strong electricity, and detect the first detection control section. It can prevent damage to the main circuit power device in the case where the main power switch is not in the case, only the power supply of the control portion is turned on to be controlled. After a period of operation, the trigger pulse to the trigger pulse of the oscilloscope detect the control panel is normal.