If it is dropped, the welder will shut down and will not be able to be turned on again!
Generally, when designing an inverter welding machine, in order to avoid the impact on the electrolytic capacitor at the moment of power-on, it will Use NTC or PTC for buffering, that is: use NTC/PCT to charge the large electrolytic capacitor of the rectifier and filter at the moment of power-on. When the voltage reaches a certain level (usually after half), the relay or contactor is closed to energize normally. The advantage of this design is that it protects the capacitor from the impact of instantaneous charging, and on the other hand, it also protects switching devices such as power switches/relays/contactors from current impact; and most general manufacturers use NTC designs.
The working process of the inverter welding and cutting equipment is to rectify and filter the three-phase or single-phase 50Hz power frequency AC power to obtain a smoother DC power. The inverter circuit composed of IGBT or field effect tube will The DC power becomes AC power of 15~100kHz. After being stepped down by the intermediate frequency main transformer, it is rectified and filtered again to obtain a stable DC output welding current (or inverter outputs AC power of the required frequency again). The control circuit of the inverter welding and cutting equipment consists of a given circuit and a drive circuit. By processing the feedback of voltage and current signals, the whole machine cycle control is realized. The control technology of pulse width modulation (PWM) is used as the core to obtain fast pulse. Widely modulated constant current characteristics and excellent welding and cutting process effects.