60results about How to "Avoid the impact of high current" patented technology

The invention discloses a hybrid electric vehicle composite power supply for self-adapting filter power dividing control and a self-adapting filter power dividing control method. The composite power supply comprises a storage battery, a super capacitor and a bidirectional DC / DC (Direct Current / Direct Current) convertor, wherein the storage battery is connected with a power bus to be used as a main power supply; the super capacitor is connected with the power bus by the bidirectional DC / DC converter and is connected with the bidirectional DC / DC converter in series to form an auxiliary power supply. The self-adapting filter power dividing control method is used for controlling the bidirectional DC / DC converter. The super capacitor in the composite power supply is used for carrying out power compensation on the storage battery so as to prevent from providing instantaneous power and peak power by the battery; the whole efficiency of the composite power supply is obviously improved; the super capacitor can be used for rapidly and efficiently charging and discharging by large current and regenerative braking energy is recycled to the greatest extent; the self-adapting filter power dividing control method realizes the reasonable distribution of power, guarantees that all parts of the composite power supply are efficient obtains the good control effect.

The invention discloses a controller of a current vortex retarder and a control method. The controller comprises a first processing unit, a second processing unit, a power driver and a CAN bus, wherein the first processing unit and the second processing unit are both connected with the CAN bus to ensure that the first processing unit outputs a control signal according to a received operating switch signal, the control signal is sent to the second processing unit through the CAN bus, and the second processing unit controls the on-off time sequence of the stator coil of the current vortex retarder through the power driver. The CAN bus is used for the transportation of data so as to simplify the wiring structure, increase the safety and the reliability for the control of the retarder, realize the real-time communication and display in the work state and realize the information sharing or control between vehicles.

The invention provides a heat transfer type resistance box and relates to electric heating equipment. The heat transfer type resistance box is composed of an upper box body, an air pipe array, a lower box body and a resistance wire. The upper box body is communicated with the lower box body, a heat exchange area is constituted by the inner space of the upper box body, the air pipe array is arranged in the heat exchange area, a front air chamber is arranged on the left side of the upper box body, a rear air chamber is arranged on the right side of the upper box body, and the front air chamber is communicated with the rear air chamber through intra-pipe spaces of the air pipe array. A heat transfer area is constituted by the inner space of the lower box body, the resistance wire is arranged in the heat transfer area, a front conductive support is arranged at the front end of the inner space of the lower box body and mounted at the inner end of a wire inlet assembly, a rear conductive support is arranged at the rear end of the inner space of the lower box body and mounted at the inner end of a wire outlet assembly, and the two ends of the resistance wire are connected to the front conductive support and the rear conductive support through mounting parts. The heat transfer type resistance box is used for high-power plasma equipment treating household garbage and enables network voltage to be stable and a plasma torch to work stably; heat of the resistance wire is transferred through heat conduction oil, and heat energy is recovered for drying garbage.

A control method and control system for a digital intelligent crane, and a crane controller, the control method and control system employing a control mode combining switching value control with communication control; the switching value control is used to control the forward-reverse rotation of a motor via an external switching value input interface, and the control mode does not require any communication address, and gear shift operation is temporarily disabled; the communication control is used to control the forward-reverse rotation via an RS485 bus, and requires an unrepeated communication address on the bus. The two control modes must be connected to a resistance box, protecting a solid-state relay from a heavy current surge caused by direct starting of the motor, thus reducing the failure rate, and ensuring the normal operation of the crane. In addition, the crane controllers can share the same power supply (601) and a micro-processor (603), thus simplifying the circuitry of a multi-quadrant crane, and reducing cost.

The invention discloses a capacitive-resistant load high-current impact type direct-current relay. The relay comprises a main relay body and a precharge control assembly. The main relay body is provided with a main contact and a contact suction coil; the precharge control assembly comprises an intelligent control module, a power switch assembly body and a current limiting device; the power switchassembly body includes a second relay body, a first power switch tube and an isolated drive module; a second relay coil is electrically connected to the intelligent control module, the first power switch tube is electrically connected to the intelligent control module through the isolated drive module; the power switch assembly body and the current limiting device are in series connection and thenin electrically parallel connection with both ends of the main contact of the main relay body. The structure is simple, the main relay body can be turned on and off near a zero-crossing point of current voltage, the capacitive load instantaneous high-current impact is effectively avoided, the use stability and reliability of the direct-current relay is improved, the service life of the direct-current relay is prolonged, damage to the circuit is reduced, and the overall use safety and reliability of the circuit are improved.