Production method of phase-based pulse width modulated sinusoidal voltage waveform data
Title：
Production method of phase-based pulse width modulated sinusoidal voltage waveform data
Application Number：
 01131096
Application Date：
 2001/09/21
Announcement Date：
 2002/04/17
Pub. Date：
 2003/10/08
Publication Number：
 1345114
Announcement Number：
 1123965
Grant Date：
Granted Pub. Date：
 2003-10-8
ApplicationType：
 Invention
State/Country：
 11[China|beijing]
IPC：
 H02M 7/00, H02M 7/5395
Applicant(s)：
 Qinghua Univ.
Inventor(s)：
 Pang Hao, Wang Zanji
Key Words：
 Production method, phase, pulse width, modulated, sinusoidal voltage, waveform data
Abstract：
 The invention relates to a method for producing waveform data with pulse-duration modulation of sine voltage. First is obtain the frequency measurement parameter Nf and the product XxNf. With waveform parameter of modulating wave and the parameter of constant amplitude ratio being selected, the variance of modulating wave of calculated. Under the control of clock pulse signal calculated, the waveform data of modulating wave is calculated based on the waveform parameter and the variance of modulating wave. The phase digital value can be obtained from counting the clock pulse signal calculated. Based on phase parameter of reference wave, the waveform data of reference wave is produced. The pulse level data can be gotten from comparing the waveform data of modulating wave with the waveform data of reference wave. Combining the pulse level data and phase counting value forms the waveform data with pulse-duration modulation. The waveform data with pulse-duration modulation of sine voltage produced by the invention provides good performances in harmonic wave and symmetry of each phase, and it provides convenient digital means for regulation and control.
Claim：
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PCT：
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