Since the discovery and use of electricity in the 18th century, various electrical appliances have been invented one after another. However, different electrical devices require different types of power sources; some need direct current while others need alternating current. Moreover, in many industrial production processes, alternating current is also required, and it needs variable-frequency alternating current. Thus, variable-frequency series resonance technology emerged. What are the advantages of such technology’s products?
The power supply capacity requirement is reduced. Variable-frequency series resonance generates sufficient high voltage and large current required by industrial electrical appliances through resonance between the resonant inductive element and the capacitor. During this process, the power supply provides only active energy consumption.
The size of the entire system equipment is reduced. Since variable-frequency series resonance technology does not require large voltage regulating devices and transformers, for variable-frequency series resonance technology, only the test capacity divided by Q is required. This will make the entire equipment significantly smaller in size.
The problem of distorted output voltage is improved. One of the advantages of variable-frequency series resonance technology is that it can filter the circuit, remove the distorted waves, and obtain a very regular sine wave. This can also avoid excessive voltage peaks caused by sudden situations, which could damage the tested object.
It can prevent excessive short-circuit current from burning the fault point. In variable-frequency series resonance current, if the edge of the tested object is fragile and is broken down, the entire circuit will lose the characteristics of the resonant circuit. In the circuit’s loop part, the current will drop sharply to the normal state’s 1/Q. However, during the AC withstand voltage test, the breakdown current in the circuit will suddenly increase. Compared with these two situations, the current values are significantly different. Therefore, using variable-frequency series resonance technology can find insulation weaknesses without burning the fault point.
No recovery overvoltage will occur. When the tested object is broken down, variable-frequency series resonance will lose its original resonant conditions. At the same time, the circuit will perform a protection circuit action and cut off the output circuit to prevent safety accidents.
Variable-frequency series resonance technology plays a crucial role in current tests. Due to these advantages, variable-frequency series resonance not only saves a lot of space but also, from a safety perspective, this technology can systematically integrate some risks and protect the entire circuit and equipment. Therefore, it has an irreplaceable position in current production.
Post time: Sep-04-2026