Honda ACCORD HYBRID 2005 Service Manual page 698

IMA System
S y s t e m D e s c r i p t i o n (cont'd)
Motor Power Inverter (MPI) Module
The MPI converts 144 V DC power into 3-phase AC power to run the electric motor during assist. During regeneration,
the MPI converts AC voltage to DC. The system's SOC is c o m p u t e d by the M C M using voltage, temperature, input
current, and output current readings f r o m the battery module.
The MPI module controls the DC/AC conversion (from the IMA battery's 144 V DC to the IMA m o t o r ' s 3-phase AC and
vice versa).
The MPI module is air cooled. The heat fed t h r o u g h the heat sink is exhausted to the trunk c o m p a r t m e n t and outside of
vehicle by the IPU m o d u l e fan.
CONTACTOR
^-o
O \ A A T
BATTERY
MODULE
MOTOR
, C O N T R O L
MPI
MODULE
INFORMATION
MCM
u / v / w
PHASE
MOTOR
CURRENT
S E N S O R S
IMA
MOTOR
MPI MODULE
IMA Motor
The IMA m o t o r is a synchronous AC type that converts electrical energy into kinetic energy, assists the engine during
acceleration, and starts the engine.
The m o t o r is located between the engine and the transmission. It consists of a 3-phase coil stator and a permanent
magnet rotor that is directly connected to the engine crankshaft. Motor rotor position sensor is m o u n t e d on the back of
the engine block to detect the position of the rotor.
MOTOR STATOR
MOTOR ROTOR
12-20