3-zero vector modulation and mixed modulation method were proposed to preserve narrow pulses and improve the output voltage waveform by configuration 3 zero vectors between effective vectors.

For the purposes of motor of a tank gun driving system,the traditional DTC and improved DTC were used to carry out simulation research,and the comparison results showed that the direct torque control method of tank gun driving system based on vector modulation can significantly improve speed and torque effectiveness of tank gun regulating system.

Under this condition it was possible to control the machine with field-oriented techniques and realized the stator current vector modulation to keep stator MMF round.

In the course of broadening the signal simulation instantaneous bandwidth by using digital vector modulation technology,the frequency-conversion channel mismatch on digital vector modulation can badly worsen mirror frequency and LO suppression parameter.

The concept of modulation vector was introduced based on in-depth analysis of the virtual inverter and virtual rectifier space vector modulation(SVM),and a novel implementation method for indirect SVM of MC was proposed.

Based on VMM (vector modulation method) principle, this paper presents a scheme for North Seeker with its particular physical implementation methods and calculation principal explained.