Regenerative charging controlling means for electric vehicle

• Main Author: KAWAZAKI YUUICHI
• Format: Patent
• Language: Chinese; English
• Published: 17.08.2011
• Subjects: 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; GENERATION; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; PERFORMING OPERATIONS; TRANSPORTING; VEHICLES IN GENERAL

The invention provides a regenerative charging controlling means for an electric vehicle which can control the excessive regenerative voltage under a state when the power is not supplied by a main battery. PDU (45) comprises an inverting circuit (46) and a control portion (47) with a CPU (47) and a pre-driving circuit (474). The control portion (47) also comprises a non-insulating DC/DC converter (472) connected from power lines (L1, L2) without passing a main switch (9), and a hardware regulator (473) fed by the non-insulating DC/DC converter (472). The hardware regulator (473) comprises a voltage detection portion (48) detecting voltage (Vp) between the power lines (L1, L2), a comparison portion (49) which can reduce on-time duty ratio of the FET of the inverting circuit (46) when the voltage (Vp) exceeds a referential voltage (Vpref) so as to lower the regenerative voltage of a motor (18).