2results about How to "Fast conduction speed" patented technology

The utility model relates to the technical field of absorption circuits, and discloses a protection circuit which comprises a power switch tube Q1, a first absorption unit and a second absorption unit are connected between a drain electrode and a source electrode of the power switch tube Q1, the source electrode of the power switch tube Q1 is connected with the ground, and the first absorption unit and the second absorption unit are connected in parallel; according to the utility model, a more efficient peak voltage absorption effect can be achieved, the power loss of the circuit can be effectively reduced, and the reliability of the circuit can be improved at the same time.

The utility model belongs to compressor technical field, specifically discloses a kind of frequency converter drive circuit, frequency converter and compressor.The high voltage side / low voltage side drive and discharge circuit in frequency converter drive circuit, it is improved as follows on the basis of original circuit structure: first, a capacitor and resistance are newly added in the gate end of MOS tube, and newly added capacitor and resistance are arranged in parallel;Second, the resistance value of voltage division resistor in original high voltage side / low voltage side drive and discharge circuit is reduced, to obtain new voltage division resistor, the resistance value of new voltage division resistor is significantly reduced compared with the resistance value of original voltage division resistor, and the sum of the resistance value of new voltage division resistor and newly added resistance is equal to the resistance value of original voltage division resistor.When MOS tube is turned on, capacitor is equivalent to short circuit, voltage is charged to MOS tube through new voltage division resistor and capacitor first, to accelerate the turn-on speed of MOS tube, reduce the risk of damaging MOS, to ensure the stable and reliable conduction of MOS tube.