The invention discloses an EMC performance testing
system under a motor on-load condition. The EMC performance testing
system includes a
darkroom, a drum, a drum motor, a power supply, a linear impedance stabilization network, a
motor controller, a
test bench and a wheel; the wheel contacts with the drum surface of the drum and drives the drum surface to rotate under the effect of the
test bench, so that the drum motor can become as a load motor of a tested motor, and therefore, on-
load testing of the tested motor can be realized; and the
vertical load of the wheel can be controlled through adjusting a
test bench fixing device, so that it can be ensured that the wheel reliably contacts with the drum surface of the drum. With the EMC performance testing
system of the invention adopted, the EMC performance of a wheel hub motor, a single motor and a
motor system including a motor, a
motor controller and a
power cable can be tested, and test results are accurate and reliable; in a constructed general
electromagnetic compatibility test environment where drums exist, a special test environment for motor
electromagnetic compatibility performance does not need to be constructed, and therefore, construction cost can be reduced; and for tested motors with different power levels in the power range of the drum motor, load motors do not need to be replaced, and therefore, load motor cost can be reduced.