Parameter sampling method and circuit of electric drive system

• Main Authors: LYU XIAOWU, ZHANG JIN, LUO JIANWU, WANG HONGTAO, ZHAO HAIRUI
• Format: Patent
• Language: Chinese; English
• Published: 23.09.2022
• Subjects: MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; TESTING

The invention discloses a parameter sampling method and circuit of an electric drive system. The sampling circuit comprises a high-voltage power supply side sampling circuit, an isolation circuit and a low-voltage power supply side sampling circuit. Wherein the signal acquisition sub-circuit is used for acquiring various state parameters of a high-voltage power supply side of the electric drive system, and each state parameter is transmitted to different ports of the multipath gating switch ports; the low-voltage power supply side sampling circuit is used for generating a marking signal and transmitting the marking signal to the multipath gating switch port through the isolating circuit, and the marking signal is used for marking a state parameter; the multipath gating switch port is used for conducting a port corresponding to the mark signal based on the mark signal so as to output a target state parameter in the various state parameters; wherein the target state parameter is transmitted to the low-voltage p