The invention provides a wide
voltage energy-saving type
permanent magnet motor power measuring
system which comprises a power measuring motor, a power measuring
machine controller, an adjustable
direct current voltage stabilizing power supply, a force moment sensor, a force moment measuring device and a computer, wherein the power measuring motor adopts a permanent
magnet alternative current motor; the power measuring motor is electrically connected with the power measuring
machine controller; the power measuring
machine controller is electrically connected with the adjustable
direct current voltage stabilizing power supply; the force moment sensor is mechanically connected with the power measuring motor; a rotation speed
signal is output through a rotation speed measuring device by using the combination of a code disc on a central shaft and an
optical coupler; the computer is electrically connected with the power measuring machine controller, the force moment sensor and the rotation speed measuring device respectively; and the power measuring machine controller is used for supplying power to a tested motor and a tested controller after being connected with the adjustable
direct current voltage stabilizing power supply in parallel. According to the wide voltage energy-saving type
permanent magnet motor power measuring
system provided by the invention, the permanent
magnet alternative current motor instead of a
magnetic powder brake or a
magnetic hysteresis brake which is popular in the market is adopted, and a wide working voltage
system is adopted so as to measure the power along with various tested controllers and tested motors at different voltage grades, and the consumed type power measurement is changed into generation type power measurement, so that a large quantity of
electric energy is saved.