The Effect of Dead Zone Mode on Electric Vehicle PWM Speed Control System

Abstract:

To realize the electric vehicle braking energy recycling and driving smooth, bipolar PWM modulation mode is often adopted. To avoid the bridge arm shoot-through, a dead zone needs to be set in the complementary upper and lower bridge arm driving signal. Using hardware circuit dead zone setting has the advantages of simple setting and high reliability, is often used in the integrated driving module, however different dead zone mode has different influence on the inverter output voltage. This paper carried analysis on motor speed nonlinear problems caused by output voltage jump around a specific duty ratio in hardware dead zone setting mode, and gives the improvement of hardware circuit. Simulation and experimental results indicate that the method can well solve the output voltage jump in the vicinity of a specific duty ratio problem.

• Periodical: Advanced Materials Research (Volumes 986-987)
• Pages: 1337-1341
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.986-987.1337
• Online since: July 2014
• Authors: Liang Rong*, Shan Jie Jia, Kui Hua Wu, Chun Mei Fu, Qing Mao Fu
• Keywords: Bipolar PWM Modulation, Dead Zone Mode, Electric Vehicle Speed Control, Voltage Jump

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