Clamping Angle Control PWM Method to Restore Linear Modulation Range of a Voltage Source Inverter

Jae Goo Kim, Kyo Beum Lee, Jung Wook Park

Research output: Contribution to journalArticle


This paper proposes the new clamping angle control (CAC) pulse width modulation (PWM) method to restore its maximum linear modulation range of voltage source inverters (VSIs) reduced by the duty ratio limitation in hardware implementation, which makes the VSIs to operate nonlinearly in the high modulation range. The deadtime and the bootstrap gate driver circuit mainly cause this duty ratio limitation in practice. In particular, the bootstrap gate driver circuit is used in many industrial applications by avoiding the additional power supply to apply the gate-source voltage of power switches, and therefore making the VSIs to be small size with the low cost. First, the proposed CACPWM method is theoretically analyzed. Then, it is applied in the high modulation range to overcome the limitation of the duty ratio due to the use of the bootstrap gate driver circuit. Thereafter, its practical effectiveness is verified by both simulation and experimental tests. Also, the resulting harmonic distortions are compared with those by the conventional PWM methods.

Original languageEnglish
Article number8292881
Pages (from-to)10914-10923
Number of pages10
JournalIEEE Transactions on Power Electronics
Issue number12
Publication statusPublished - 2018 Dec

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

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