This paper presents the sensorless direct torque

control (DTC) technique for five-phase interior permanent

magnet (IPM) motors. By using the introduced technique fast

torque response with low ripple in the stator flux and torque of

the five-phase interior permanent magnet motor can be achieved.

Having thirty-two space voltage vectors provides great flexibility

in selecting the inverter switching states. Therefore, the stator

flux and torque can be more precisely adjusted. Position

information and speed are being estimated based on the position

of the stator flux linkages. The mathematical model of the fivephase

interior permanent magnet motor is first derived. Later,

the speed sensorless direct torque control method of the fivephase

IPM is introduced. A five phase interior permanent

magnet motor and five leg IGBT based inverter were designed

and fabricated in the laboratory. The control method is

implemented on a TMS320C32 digital signal processor board.