Nine-phase permanent magnet electric driving reconstruction type vehicular charging system for electric automobile

Abstract

The invention relates to a nine-phase permanent magnet electric driving reconstruction type vehicular charging system for an electric automobile. The nine-phase permanent magnet electric driving reconstruction type vehicular charging system comprises a three-phase power source, a shift switch, a nine-phase permanent magnet motor winding of a nine-phase permanent magnet motor, a capacitor, three-phase bank voltage type inverters, a relay and an accumulator. The charging system sufficiently utilizes an original nine-phase inverter, a nine-phase permanent magnet motor winding, a control and sensor unit and the like of the electric automobile, and rectification, inversion and power-factor correction are completed by optimizing topology, and the total function integration of motor driving, highpower factor charging, harmonic suppression and the like is achieved. When charging is conducted, three independent neutral points of a six-phase winding are utilized to serve as a three-phase alternating current interface, the six-phase winding serves as a filter inductor of a three-phase AC/DC rectifier, and a self-inductor of a remaining three-phase winding is reconstructed to be an energy-storage inductor of a three-phase staggered DC/DC converter. The two sets of three-phase voltage type inverters achieve an AC/DC rectification function, and the one set of three-phase voltage type inverter achieves a DC/DC direct current transformation function.

Description

technical field [0001] The invention relates to a nine-phase permanent magnet electric drive reconfigurable on-board charging system for electric vehicles, which is applied to three-phase high-power on-board charging applications such as electric vehicles. Background technique [0002] In recent years, the number of cars has been on the rise, and the consumption of non-renewable energy has also increased. Moreover, the exhaust gas emitted by traditional cars has caused air pollution, and the smog caused by it has also posed a direct threat to human health. Compared with traditional internal combustion engine vehicles, electric vehicles have the advantages of energy saving, environmental protection, and high efficiency. Pure electric vehicles are "zero-pollution" vehicles, do not consume oil, do not emit exhaust gas, the motor drive noise is small, easy to control, can obtain good steady-state characteristics and the ability to operate in four quadrants (regenerative braking)...

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This structure undoubtedly increases the weight and cost of the ele

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