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1913 results about "Load resistance" patented technology

Load resistance always added in the overall resistance of the circuit. Which has so many effects on the circuit such as with increase in load resistance, the voltage drop will be increased due to that there will be sudden increase in the heat, which can burn the insulation of the circuit.

Coal chemical industry wastewater treating method

The invention relates to a coal chemical wastewater treatment method, in particular to a chemical wastewater treatment method. The invention aims to solve the problems of the chemical wastewater treatment method such as bad outlet water quality and high operational cost. The method comprises the following steps: pretreating coal chemical wastewater to be treated; then carrying out hydrolytic acidification treatment, external circulating anaerobic treatment, anaerobic sedimentation treatment, adjusting hydrolytic acidification treatment, contact oxidation treatment, sedimentation treatment, A / O treatment, sedimentation treatment, deamination treatment, coagulating sedimentation treatment and aeration biological filter tank treatment, wherein the temperature in an external circulating anaerobic tank is controlled within the scope of 32 to 35 DEG C; the hydraulic detention time is 24 to 36 h; the sludge concentration is controlled between 50 and 100 g / L; the volume load is 5 to 10 kg COD / m.d ; and the pH value is controlled between 7.0 and 7.5. The invention has the advantages of flexible operation, impact load resistance, low operating cost and good treatment effect; after the coal chemical wastewater is treated by the treatment method, the outlet water quality completely can achieve the wastewater comprehensive discharge standard regulated by the State.
Owner:HARBIN INST OF TECH

Locomotive control loop grounding detection circuit and grounding detection method and wire break detection method

The invention discloses a locomotive car duct pilot earth detecting circuit, which comprises a positive bus-bar, a negative bus-bar, a load resistance, line-to-ground isolated resistances of the positive bus-bar and the negative bus-bar, wherein, two detecting branch circuits are connected between the positive or the negative bus-bar and the earth respectively, one of which is composed of a known resistance and the other one is composed of the known resistance and a switch board in series connection. At the same time, an earth detecting method and a thread break error detecting method are further provided to be used for the locomotive car duct pilot earth detecting circuit. The locomotive car duct pilot earth detecting circuit can not only judges the earth errors existing in the locomotive car duct pilot by detecting the size of the line-to-ground isolated resistance of the positive and the negative bus-bar, but also detects the errors of thread breaking, which overcomes the shortcomings of traditional methods, alarms the earth errors in advance, eliminates the hidden safety trouble caused by the earth errors to regular running of locomotive cars and improves the normal using efficiency of locomotive cars.
Owner:ZHUZHOU ELECTRIC LOCOMOTIVE CO
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