Research on the Method of High-voltage Motor's Superposing-Frequency Test and Data Acquisition Abstract: High-voltage motor temperature-rise test method have direct load method and method of equivalent load, equivalent load and divided into lowering voltage load method and iterative method, the method of frequency test In order to try to be high voltage motor in the load method or not directly load method for temperature rise in blood pressure test, this paper introduces the fold the frequency test method; Through the variable frequency power supply unit, realize the power to provide test voltage and the frequency of adjustment, and the frequency conversion power provide test power supply for comparison, reflects the development of frequency test pile. Using special inverter power complete fold frequency test, the equipment is simple, the operation is convenient, can achieve test automation, intelligence, will in the motor test field go a long way. Fold the frequency of asynchronous motor temperature rise test don't need to mechanical connection, so the method especially suitable for high pressure vertical asynchronous motor, super equipment capacity of the induction motor and low speed asynchronous motor and no suitable with the rise of temperature of the motor test try. Through the high-speed sampling instrument and high-speed sampling data card to the use of the temperature rise measured automatically, it is concluded that, judge test results, automatic generation, printing reports. Keywords: Superposing-frequency; Temperature-rise test; Frequency power;Data acquisition; Experiment