6 results about "Power frequency" patented technology

The invention provides a temperature-controllable electric field induction platform. The temperature-controllable electric field induction platform comprises a clamping portion, a temperature keeping portion and an electric field generation portion, wherein the clamping portion is arranged on a work platform (16) in the temperature keeping portion, temperature of a temperature control box of the temperature keeping portion is controlled through a temperature control heating system composed of a PID silicon controlled rectifier temperature control component (21), thermocouples (19) and (20) and ten sets of resistor heating components (18), and the electric field generation portion can generate a 50kV-voltage power frequency AC electric field and a DC electric field. The platform mainly satisfies requirements of a complete sulfuration process of preformed liquid state silicone rubber while being applied to electric field induction processing manufacturing, ordered arrangement is realized under the orientation induction action of the electric field, conductive particles of the conductive rubber are made to form a more effective flow path, the heating portion can provide a heat source for rubber sulfuration, and the platform can provide an external high-field-intensity field for the conductive rubber when influence of the external electric field on conductive performance of materials is tested.

The invention discloses a mutual inductor power frequency withstand voltage retest tool which comprises a first conveying belt, a second conveying belt and a test board, a bent arm is installed on the side wall of the test board through a driving mechanism, two sliding grooves are symmetrically formed in the side, facing the test board, of the bent arm, and inclined plates are rotationally arranged in the two sliding grooves. And a fixing block is jointly and rotationally supported at the ends, away from the bent arm, of the two inclined plates, an electric telescopic rod is installed on the fixing block, the output end of the electric telescopic rod is fixedly connected with a hollow push rod, and a second electromagnet is installed in the hollow push rod. The angle change between the two inclined plates can change the distance between the electric telescopic rod and the positioning table, the maximum displacement distance of the hollow push rod is relatively increased, on one hand, the extension length of the output end of the electric telescopic rod can be shortened, the axial pressure of the electric telescopic rod can be reduced, and on the other hand, the space occupied by the electric telescopic rod and the hollow push rod is reduced. And the structure of the device is more compact.

The invention discloses an arc extinguishing method of a recoil arc extinguishing lightning protection insulator, and belongs to the technical field of lightning protection. When a tower or a power transmission line lead is struck by lightning and insulator flashover occurs, lightning arc always selects a channel which is shortest in path and is most conductive to the ground to be discharged to the ground. A plurality of recoil pipes which are installed on the periphery of the skirt edge and swing left and right at a certain inclination angle form an arc extinguishing channel, the channel shortens the length of a lightning stroke flashover path through lightning arresting electrodes in the recoil arc extinguishing pipes to play a role in insulation matching, and the lightning stroke flashover path is overlapped with the recoil arc extinguishing channel according to the control rule of insulation matching. According to the invention, the effect of step-by-step arc extinguishing through the plurality of recoil pipes is good, the process of impacting an arc building channel and inhibiting power frequency arc building can be effectively destroyed, and compared with a traditional insulator, the insulator additionally provided with the recoil pipes can be used for backflushing and jetting a flowing arc so that the effects of protecting the insulator and preventing the insulator from bearing huge pressure are achieved.

The invention discloses a control method of an integrated charging device, the integrated charging device and a vehicle. The method comprises the following steps: acquiring a first voltage sampling signal value, a voltage sampling reference signal value and a first voltage amplitude corresponding to the first voltage sampling signal value of a power grid; when the first voltage sampling signal value is larger than or equal to the voltage sampling reference signal value and the first voltage amplitude is smaller than the first voltage threshold value, the power frequency lower tube is controlled to be closed, and the power frequency upper tube is kept closed; acquiring a second voltage sampling signal value of the power grid and a second voltage amplitude corresponding to the second voltage sampling signal value; and when the second voltage sampling signal value is smaller than the voltage sampling reference signal value and the second voltage amplitude value is smaller than the second voltage threshold value, the power frequency lower tube is kept closed, and the power frequency upper tube is controlled to be conducted. According to the method, the generation of zero-crossing abnormal current when the positive direction of the power grid is converted into the negative direction of the power grid is eliminated.