2results about How to "Load safety" patented technology

The invention relates to the field of power equipment, in particular to a power converter and a control method thereof. The power converter comprises a primary side bridge arm, a secondary side bridge arm, a transformer connected between the primary side bridge arm and the secondary side bridge arm, and a control circuit connected with the primary side bridge arm and the secondary side bridge arm. The control circuit is used for detecting whether the output voltage of the power converter suddenly rises or not, and when the output voltage suddenly rises, the phase shift angle between the primary side bridge arm and the secondary side bridge arm is controlled to be smaller than 0 so as to reduce the output voltage. According to the invention, the dynamic performance and the load adaptability under the sudden rise of the output voltage are improved, the output voltage is rapidly recovered, and the safety of the load is ensured.

This invention discloses a multi-contact parallel-connected snap-action electromagnetic relay, comprising a snap-action armature, a moving spring portion, and a stationary spring portion; the stationary spring portion includes two stationary spring plates for realizing current inflow and outflow; one end of the moving spring portion is connected to the armature; at least three sets of contacts are provided between the moving spring portion and the two stationary spring plates to form at least three-contact parallel circuits. This invention can realize more than three-contact parallel circuits, which can reduce contact resistance, reduce temperature rise, and reduce total Holm force, thereby preventing relay failure.