Abstract: A resonant circuit and a control method thereof, the resonant circuit including a plurality of resonant modules connected in parallel. The control method includes: obtaining an output current signal and an output voltage signal according to an output current and an output voltage sampled of the respective resonant module; correspondingly generating, via the respective resonant module, a first control voltage signal through a voltage loop according to a current difference between the output current and an average output current and the output voltage signal, and correspondingly generating a second control voltage signal through a current loop according to the output current signal; selecting to use one of the first or second control voltage signal according to whether the output current reaches the current limit value for controlling a switch frequency of the corresponding resonant module, thereby achieving current-sharing or current-limiting control of the respective resonant module.

Abstract: The present disclosure discloses a grounding wire detection circuit, for monitoring whether an electrical device is grounded in real time, the grounding wire detection circuit including: a grounding detection circuit and a sampling control circuit, wherein the grounding detection circuit is electrically connected to a live wire, a neutral wire and a grounding wire of a single-phase three-wire type input, the live wire and the neutral wire are electrically connected to a main circuit of the electrical device; and the sampling control circuit is configured to isolate a current detected by the grounding detection circuit and convert the current into a sampling voltage. The real-time monitoring of whether or not a device is grounded may be achieved by detecting the sampling voltage, so as to alarm, cut off electrical device accordingly, which can improve safety of using the electrical device.

Abstract: The present disclosure discloses a grounding wire detection circuit, for monitoring whether an electrical device is grounded in real time, the grounding wire detection circuit including: a grounding detection circuit and a sampling control circuit, wherein the grounding detection circuit is electrically connected to a live wire, a neutral wire and a grounding wire of a single-phase three-wire type input, the live wire and the neutral wire are electrically connected to a main circuit of the electrical device; and the sampling control circuit is configured to isolate a current detected by the grounding detection circuit and convert the current into a sampling voltage. The real-time monitoring of whether or not a device is grounded may be achieved by detecting the sampling voltage, so as to alarm, cut off electrical device accordingly, which can improve safety of using the electrical device.