Vehicle-mounted charging circuit

Abstract

The invention provides a vehicle-mounted charging circuit. The vehicle-mounted charging circuit comprises a first battery pack, a first H-bridge circuit, a first resonance network circuit, a second battery pack, a converter, an isolation transformer, a second resonance network circuit, a second H-bridge circuit, a three-phase bridge inverter circuit and a motor. The first battery pack is connectedwith the first H-bridge circuit, the first resonant network circuit is connected with the first H-bridge circuit, and the second battery pack is connected with the converter and the primary side of the isolation transformer; the converter is connected with the primary side of the isolation transformer and forms a half-wave rectification circuit with the primary side, the primary side of the isolation transformer is separately connected with the first resonance network circuit and the first H-bridge circuit, and the secondary side of the isolation transformer is connected with the second resonance network circuit and the second H-bridge circuit; the second resonant network circuit is connected with the second H-bridge circuit, the three-phase bridge inverter circuit is connected with the second H-bridge circuit, and the motor is connected with the three-phase bridge inverter circuit, so that the size of the vehicle-mounted charging circuit can be reduced, and the charging power and thepower density of the vehicle-mounted charging circuit are improved.

Description

technical field [0001] The present invention relates to the technical field of motor drive, and in particular, relates to a vehicle-mounted charging circuit. Background technique [0002] In recent years, electric vehicles have developed extremely rapidly, and there are more and more users, but the experience of users on electric vehicles cannot be compared with that of traditional fuel vehicles. An important reason is that the charging speed of electric vehicles is too slow. At present, more emphasis is placed on experience, and it is imperative to increase the charging speed of electric vehicles. To increase the charging speed, the charging power must be increased, but the increase in charging power will increase the volume and cost. [0003] The existing motor driver, on-board charging circuit and DC-DC converter are all a separate product. Although they communicate with each other, they are independent on the circuit, so the power density of the overall circuit is low. ...

AI Technical Summary

Problems solved by technology

[0002] In recent years, electric vehicles have developed extremely rapidly, and there are more and more users, but the experience of users on electric vehicles cannot be compared with that of traditional fuel vehicles. An important reason is that the charging speed of electric vehicles is too slow. At present, more attention is paid to the experience, and it is imperative to increase the charging speed of electric vehicles. To increase the charging speed, the charging power must

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