Toyota Camry Hybrid AHV40 Manual page 21

Permanent Magnet Motor (for MG1 and MG2)
D When a three-phase alternating current is passed through the three-phase windings of the stator coil, a
rotational magnetic field is created in the electric motor. By controlling this rotating magnetic field
according to the rotor's rotational position and speed, the permanent magnets that are provided in the
rotor become attracted by the rotating magnetic field, thus generating torque.
The generated torque is for all practical purposes proportionate to the amount of current, and the
rotational speed is controlled by the frequency of the alternating current.
Furthermore, a high level of torque, all the way to high speeds, can be generated efficiently by properly
controlling the rotating magnetic field and the angles of the rotor magnets.
D When the motor generates electricity, the rotor rotates to create a magnetic field, which creates a current
in the stator coil.
Rotational
Magnetic Field
#
V Phase
! : From inverter
# : Connected internally in the motor
(+)
(-)
Three-phase Alternating Current Output Waveforms
THS II (TOYOTA HYBRID SYSTEM II)
U Phase
N
S
Attraction
U
V
#
Stator Coil
Rotor
Repulsion
W Phase
#
182TH29
W
TH-21
277TH47