Toyota Camry Hybrid AHV40 Manual page 49

5. Inverter Assembly Control
General
D The inverter converts the direct current from the HV battery into an alternating current for MG1 and
MG2, or vice versa, in accordance with the signals provided by the THS ECU via the MG ECU. In
addition, the inverter supplies the alternating current from the MG1 power to the alternating current for
MG2. However, the electricity that is supplied by MG1 to MG2 is converted into DC inside the inverter.
D Via the MG ECU, the THS ECU transmits a signal to the power transistor in the inverter for switching
the U, V, and W phases of stator coil of MG1 and MG2 based on the rotor position information sent by
MG1 and MG2, and the SOC of the HV battery sent by the battery smart unit.
D When the shift lever is in the N position, or the THS ECU has received an over-heating, over-current,
or fault voltage signal from the inverter, the THS ECU transmits a shut down control signal to the inverter,
in order to disengage the electrical connection to MG1 and MG2.
" A
System Diagram
Inverter
Assembly
Nominal
Voltage of
DC 244.8 V
HV Battery
Alternating
MG1
Current
MG2
THS II (TOYOTA HYBRID SYSTEM II)
MG1 MG2
(3)
UVW UVW
IPM IPM
for Driving for Driving
Boost
Converter
(1) (2)
HV Battery
Boost
Converter
(1) Voltage Boost Conversion Function
Maximum
Voltage of
DC 650 V
Inverter
(2) Voltage Drop Conversion Function
Alternating
Current
MG1 Inverter
(3) Electrical Power Supply Function
MG ECU
THS ECU
02HTH43Y
Alternating
Maximum
Current
Voltage of
DC 650 V
Inverter
Nominal
Voltage of
DC 244.8 V
Boost
Converter
Alternating
Current
MG2
TH-49
MG1
MG2
255TH70
HV Battery
255TH71
255TH72