51results about How to "Meet electricity requirements" patented technology

The invention provides a power transmission line self-power collecting device. The power transmission line self-power collecting device comprises a magnetic core, a secondary side winding with a plurality of taps corresponding to the numbers of windings of different coils, a relay array for switching the plurality of taps of the secondary side winding, a rectifying and filtering module for rectifying and filtering an alternating current power output via the secondary side winding and then outputting a direct current power, a current measuring module for measuring the current of the secondary side winding, a voltage measuring module for measuring the voltage of the secondary side winding, and a control module for controlling the relay array to switch the taps in the secondary side winding after the calculated power is determined beyond the range of a power threshold. Compared with the prior art, the self-power collecting device can switch the taps in a self-adaptive way when the power is beyond the scope of the power threshold, thus the power supply can be kept in the scope of the power threshold always, and moreover, the self-power supply device can be protected, so the service life can be prolonged; and the power can be continuously and stably supplied to the follow-up electric equipment, and the requirements of the electric equipment on power can be met.

The invention discloses a floor-wiping and shoe-wiping dual-purpose machine, namely an electric floor wiping machine which can serve as a shoe wiping machine at the same time and has functions of sweeping, wiping and sucking. A storage battery supply is adopted, and cotton yarn brush rollers are used for wiping the floor, so that the machine integrates the functions of sweeping, wiping and sucking and achieves dry and wet double purposes. When the machine is used for wiping the floor, the brush rolls rotate back and forth in a rolling mode, swing left and right in a reciprocating mode and act in a mode that the height floats with topography; and wet tissues are used for wiping the floor indirectly, so that the machine is simple to operate and convenient for maintenance. When the machine is used for wiping shoes, the effect of induced air dust removal is promoted, so as to bring about benefits for air cleaning. The machine has the characteristics of reducing labor intensity, guaranteeing cleaning quality, improving working efficiency and reducing water and electricity consumption.

The invention provides a three-phase load balanced power guarantee method for tent hospitals in the field, which belongs to the technical field of power supply and distribution for tent hospitals in the field. The phase sequence transfer switch of the power distribution box can transfer the power distribution box under the phase sequence with the heavier load to the phase sequence with the lightest load, or detect the connection of all electrical equipment connected to it through the auxiliary controller in the power distribution box phase sequence of the power supply, and feed back the phase sequence information of each power distribution box to the main controller. The controller sends out control commands to control the power distribution box of the power supply line with the heaviest load to switch to the power supply line with the lightest load, so as to realize online automatic adjustment of three-phase loads to meet the needs of various centralized or decentralized deployment methods for field tent hospitals power requirements.

The present invention relates to an energy-absorbing device for double-stream manufacturing vehicles. The energy-absorbing device includes a first voltage output device and a second voltage output device; the output end of the first voltage output device is connected with a voltage comparator; The output end of the described voltage comparator is connected with a rectifier; the output end of the described rectifier is connected with an energy absorbing resistor; the output end of the second voltage output device is connected with a three-phase to single-phase converter; The energy device is also provided with a transformer; the output end of the transformer is connected to the rectifier; the output end of the transformer is also provided with a transformer connector; the output end of the transformer connector is connected to the input end of the voltage comparator. Its advantages are as follows: when the vehicle is braking, the energy generated by the return line in the catenary, after being stepped down by the transformer, is transmitted to the energy-absorbing resistor for absorption through the rectifier, effectively preventing the current from feeding back power to the grid through the return line, It meets the power requirements of the grid and has good safety.

The invention provides a method for laser bending forming of a blade switch blade holder, which can be used for rapid bending forming of the blade switch blade holder without a mold. First, based on the temperature gradient mechanism, when the laser scans the metal sheet, the laser scanning line area will generate uneven thermal stress due to the temperature gradient, causing the sheet to bend toward the laser beam, and at the same time, the scanning area will generate new residual stress and strain distribution. Secondly, based on the buckling mechanism, the laser scanning is performed on the pre-bending back position, and the plate is bent away from the laser beam due to the influence of the residual stress and strain generated by the pre-bending. When laser forming the sample of the tool holder, by changing the laser parameters and the number of laser scans of each path, combined with appropriate path planning, high-precision laser rapid bending of tool holders of different sizes and shapes can be realized.

Embodiments of the present invention provide a hot-swap method, a hot-swap control device, and a voltage balancing method and device. On the one hand, in the embodiment of the present invention, when there is a battery unit to be replaced among the plurality of battery units connected in parallel, the branch where the battery unit to be replaced is cut off. Therefore, the technical solutions provided by the embodiments of the present invention can solve the problem in the prior art that there is a contradiction between replacing the battery unit and the normal operation of the power supply system, and the resulting low security and stability of the power supply system.