2results about How to "Adjustable current" patented technology

This invention relates to a test device for the de-icing current curve of a contact network at different temperatures. It includes a DC power supply and a low-temperature test chamber. The low-temperature test chamber contains a test cavity, and the DC power supply is equipped with a power cord. The device is characterized in that: the cable sample is wrapped with a transparent flexible tube, and the cable sample is connected to the power cord of the DC power supply; the test chamber contains a first water storage bottle and a second water storage bottle for collecting melted water from the ice layer surrounding the cable sample; a transparent observation window is located on the front of the test chamber for observing the de-icing state of the cable sample; and a support mechanism is provided within the test chamber to support the cable sample. This device for testing the de-icing current curve of a contact network can test the de-icing time of cable samples under different temperatures and current conditions, providing a scientific and reliable reference for the actual de-icing of the contact network of electric locomotives.

This utility model discloses a regulated power supply circuit. The circuit includes: a power supply module, an LDO module, an output adjustment module, and an output feedback module; the input terminals of the power supply module and the LDO module are electrically connected; the output terminal of the LDO module is electrically connected to the control terminal of the output adjustment module; the power supply module is also electrically connected to the input terminal of the output adjustment module; the output terminal of the output adjustment module is electrically connected to the input terminal of the output feedback module; the output terminal of the output feedback module is electrically connected to the feedback terminal of the LDO module; the output feedback module detects the real-time voltage signal output by the output adjustment module and feeds it back to the LDO module; the LDO module adjusts its output voltage control signal to the output adjustment module according to the real-time voltage signal; the output adjustment module, under the voltage control signal of the LDO module, stably outputs the voltage signal from the power supply module; wherein, the parameters of the output adjustment module are adjustable to make the output current of the regulated power supply circuit adjustable.