Beijing University of Chemical Tehcnology

Anhui Welling Auto Parts Co., Ltd.

Power Supply Service and Management Center, State Grid Jiangxi Electric Power Co., Ltd.

Di Wu

Xuewei Wang

Jintao Chen

Yan Zhao

Kexu Chen

Tao Hu

Jian Ma

Yang Xiao

Qiang Liu

Yanlinzi Huang

Gaofeng Deng

Ziqiang Zhu

Aichao Yang

Disclosed are a dynamic error measurement apparatus, system, and method for an electricity meter. The measurement apparatus includes a test signal generation unit configured to generate a voltage test signal and two-circuit current test signals, output the voltage test signal to a measurement unit, and output the two-circuit current test signals to the measurement unit and a current summation unit; the measurement unit configured to determine two-circuit electric energy values based on the voltage test signal and the two-circuit current test signals, and output the two-circuit electric energy values to a calculation control unit; the current summation unit configured to determine a combined current signal based on the two-circuit current test signals; and the calculation control unit configured to determine a total electric energy value based on the two-circuit electric energy values. The system includes a standard meter and a measurement apparatus.

Dynamic error measurement apparatus, system, method for electricity meter

A rotor for a motor is provided. The rotor has a rotor core, first permanent magnets mounted in first grooves of the rotor core, and second permanent magnets mounted in second grooves of the rotor core. The rotor core is provided with groove groups distributed in a peripheral direction of the rotor core. Each groove group has an air groove, a first groove and a second groove. The ends of the air groove, the first groove and the second groove, which are close to a center point of the rotor core, are close to one another. The end of the air groove, the first groove and the second groove, which are away from the center point of the rotor core, are away from one another. Multiple magnetic isolation structures are provided in the rotor core.

Rotor for motor, drive motor and vehicle

Growing community of inventors

Anhui, China

Di Wu