84results about "Liquid resistors" patented technology

The invention discloses a high pressure water resistor which comprises a working water tank made from an insulating material. A phase potential polar plate and a zero level polar plate are concentrically arranged in the working water tank; a resistance value adjusting mechanism is arranged between the phase potential polar plate and the zero level polar plate; a water through window communicating the phase potential polar plate and the zero level polar plate is arranged on the resistance value adjusting mechanism; the resistance value adjusting mechanism adjusts the cross section, communicated by water, between the two polar plates by adjusting the size of the water through window; the cross section, communicated by water, between the two polar plates changes, so that the resistance between the polar plates changes. The resistance value adjusting mechanism is small in inertia and high in control sensitivity, effectively solves the problem of large fluctuation of a load power of a unit, is high in testing precision, good in safety performance and suitable for high pressure environments, can be applied to a direct current test, an alternating current test and a three-phase alternating current test, and is convenient and rapid, low in testing cost, reasonable in structure, convenient to operate and good in universality.

The invention is designed for solving the problem of which the liquid resistor currently used in the squirrel cage motor always carries high voltage so as to threaten the human safety. It comprises a cabinet, a liquid resistor tank located on the moving pole plate and the fixed pole plate, a driver mechanism for driving the pole plates to make up and down movement, and a cooling system. The liquid resistor tank is separated by a stick up plate into a liquid resistor chamber and a slack flow chamber. On the upper portion of the liquid resistor chamber, there is a filter layer, and on the upper portion of the slack flow chamber, there is an oil-water separator; the water outlet is connected to the liquid resistor chamber; the oil outlet is connected to the slack flow chamber. The input pipe and outlet pipe all are made of high pressure resistance materials, and are respectively connected to the entrance and the exit of cooling agent. The cooling system uses high pressure resistance cooling agent.

The invention discloses a rheostat structure of an electrical-hydraulic rheostat starter. The rheostat structure comprises a water tank, three pairs of electrode bars and an electrode bar lifting structure. The rheostat structure further comprises two locating columns, a buoy and a flexible indication strip, wherein the locating columns are fixed into the water tank; the buoy is arranged on one locating column in a sleeving mode and can move vertically along with the water level; the flexible indication strip is partly inserted in a slot formed in the inner surface of a water tank cover, one end of the flexible indication strip is fixed to the buoy, the flexible indication strip moves vertically along with the buoy, and vertical change of the water level can be converted into horizontal change through the flexible indication strip. The water tank cover is provided with holes which the electrode bars are inserted in, seal rings arranged outside the electrode bars in a sleeving mode and a housing used for fixing the seal rings to the inner surface of the water tank cover. The rheostat structure further comprises a standby water tank, wherein the standby water tank is adjacent to the water tank, a water pump is arranged in the standby water tank, and the water pump can inject water in the standby water tank into the water tank through an inlet in the upper portion of the water tank. The rheostat structure further comprises a magnetic material and a reed switch which are used for controlling the water pump to work. The rheostat structure of the electrical-hydraulic rheostat starter has the advantages of being reasonable in structure, low in cost, easy and convenient to maintain and longer in maintenance period.