DC voltage control system for hybrid power automobile and working method thereof

Abstract

The invention discloses a DC voltage control system of hybrid electric vehicle, comprising generator, electromotor, storage battery and control unit. The control unit controls the generator and electromotor and is connected with them. Generator and electromotor are connected with the storage battery in current. A voltage-increasing power supply circuit for increasing outputting voltage of storage battery to electromotor and a voltage-decreasing charging circuit for decreasing outputting voltage of generator or obtaining outputting voltage from vehicle kinetic energy to the storage battery when electromotor is used as regenerative braking are set between the electromotor and the storage battery. The control unit is used to control on-off and switch of the voltage-increasing power supply circuit and the voltage-decreasing charging circuit. Because voltage-increasing circuit is adopted storage battery can adopt low-voltage battery group so as to decrease battery system cost and cubage and achieve demands of low cost and mass production. Because power supply increasing voltage of electromotor is improved copper quantity for motor winding can be decreased greatly; motor size is decreased; consumption is decreased and efficiency is improved under the status of the same power.

Description

technical field [0001] The invention relates to the technical field of hybrid electric vehicles, in particular to a DC voltage control system and a working method of the hybrid electric vehicle. Background technique [0002] With the gradual reduction of oil resources, environmental pollution is becoming more and more serious. In the future, cars must reduce fuel consumption as much as possible, or even not use oil at all, so as to adapt to the gradually increasing pressure on environmental protection. To solve this problem, but this technology is still immature, the cost is still high, affected by battery price, charging time and mileage after each charge, etc., there is still a long way to go before large-scale commercial application. So for now, cars that use petroleum cannot be replaced. The only thing that can be done now is to reduce fuel consumption as much as possible. Hybrid vehicles are a good way to reduce fuel consumption. Generally, the idea of ​​designing a hy...

AI Technical Summary

Problems solved by technology

Generally, the idea of ​​designing a hybrid vehicle is to increase the engine power, or increase the voltage of the battery pack to increase the output power and torque of the vehicle, but no matter which method is used, the fuel efficiency is very low. If you want to achieve both environmental protection and output It's hard to be powerful

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