电动汽车矢量控制系统非线性补偿方法及系统

• Format: Patent
• Language: Chinese
• Published: 23.01.2018
• Subjects: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TOTRANSPORTATION; CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRIC EQUIPMENT OR PROPULSION OF ELECTRICALLY-PROPELLEDVEHICLES; ELECTRICITY; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES, IN GENERAL; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERATION; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; PERFORMING OPERATIONS; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; TRANSPORTING; VEHICLES IN GENERAL

本发明公开了种电动汽车矢量控制系统非线性补偿方法及系统，解决了现有逆变器的非线性特性导致相电压和相电流畸变的问题，其特征在于在两相静止坐标系下，根据电流空间矢量所在的不同扇区，将逆变器功率器件导通压降带来的电压偏差反馈给指令电压来进行补偿，保证了并网电压空间矢量仍为圆形轨迹，提高了相电压和相电流的正弦度。本发明简单有效，能够有效减小非线性误差造成的电压电流畸变现象，提高了系统运行性能；结构简单可靠、易于实现，解决了电动汽车低速行驶带来的动态稳定性差的问题，改善了电动汽车加速性能，抗干扰性强，检测精度高。 The invention discloses an electric automobile vector control system nonlinear compensation method and system, and solves the problems of distortion of phase voltage and phase current caused by the nonlinear characteristics of the existing inverter. The electric automobile vector control system nonlinear compensation method is characterized in that voltage deviation caused by conduction voltage drop of an inverter power device is fed back to induction voltage for compensation according to different sectors of current space vectors under a two-phase stationary coordinate system so that the grid-connected voltage space vectors are still guaranteed to be circular traces, and the sine degree of phase voltage and phase current can be enhanced. The electric automob