The traditional modulation method of the inverter in a permanent magnet synchronous mo-
tor (PMSM) is lengthy and computationally intensive. Based on this, a simplified sinusoidal
pulse width modulation method is proposed. In this method, voltage space vectors in each
sector are synthesized, and the sector in which the synthesized vector is located is determined
by the rotation angle of the resultant vector, and then the acting time of the basic vector
is calculated by the voltage difference of the phase voltage. The problem of trigonometric
functions and coordinate conversion is not involved in the whole calculation process, the
calculation model is simple, and it is easy to realize digitization. Mathematical modeling is
carried out by using the simulation software Matlab, and the correctness of the calculation
method after optimization is verified, which provides an idea for the later research of the
inverter modulation method.
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