Toyota Hybrid MG1 and MG2

Another look at the magical unicorns found in the transaxle of the Toyota Prius. The Prius has no variable gear ratios between the traction motor and the final drive. This is a look at what that looks like.

[@willgeorge5644]

at 7:30 you say "if the gasolene engine needs to drive this quickly, then it's automatically going to take torque away from helping to drive the sun gear". Not true, the torque ratio between the 3 ports of the planetary drive is constant, if the engine torque is a certain figure then the torque to MG1 and the torue assistance to MG2 is constant. What the planetary box does is to keep torque ratios the same while allowing RPM between MG1 and MG2 assistance to vary, so by electrically controlling MG1 RPM and engine RPM you can control wheel RPM.

[@jorgetrevino5757]

Hi and thanks for the video but how you know when is damage?

[@SteveRobReviews]

Cool 👍

[@jvm3753]

What kind of readings would be obtained doing a resistance test, or megger test of the motor windings, with mot 1 and 2 still installed in the vehicle? Looking for a shorted motor, due to bearing failure.