3 results about "Power test" patented technology

The invention relates to a system of power test, and the objective is to provide an air-fuel mixed power test system. In the test system, an eddy current dynamometer is connected with a pneumatic engine, a hydraulic dynamometer is connected with an internal combustion engine; and the test system also includes a gas tank for storing high pressure gas, the gas tank is connected with a heat exchanger, a stable pressure box and a pneumatic engine in order via pipelines; high-temperature discharging pipelines of the internal combustion engine is connected with the heat exchanger, exchanging heat with high pressure gas by the heat exchanger and communicationg with the atmosphere; a pressure sensor is provided on the stable pressure box, pipelines of the gas tank outlet is provided with an air flow meter, high pressure gas pipelines of both sides of the heat exchanger is provided with a thermocouple respectively; and all the pressure sensor, the air flow meter and the thermocouple are connected with a computer. The invention provides feasible test system for verifying validity of the air-fuel mixed power test system theoretical derivation, being able to provide reliable experimental parameters for implementation of more advanced air-fuel mixed power system in the future.

The invention discloses a verification method and a verification device for a transformer short-circuit impedance tester, and relates to the field of calibration, verification and detection of power test instruments, and the verification method comprises the following steps: measuring a plurality of basic parameters of the transformer short-circuit impedance tester to be tested by using a standard source, using a standard transformer short-circuit impedance tester and a to-be-tested transformer short-circuit impedance tester to carry out short-circuit impedance testing on the selected transformer, and obtaining a first impedance value and a second impedance value of the selected transformer; and judging whether a relative error between each basic parameter and a set value of the basic parameter is within a preset relative error range or not, if so, judging whether a relative error between the second impedance value and the first impedance value is within the preset relative error range or not, and if so, determining that the to-be-tested transformer short-circuit impedance tester is qualified. According to the verification method and verification device for the transformer short-circuit impedance tester, the reliability of the verification result of the transformer short-circuit impedance tester can be improved.