초록 ▼

In an electric car drive system having a car drive motor powered by a mounted direct current power supply, a control system including a signal generating means is provided to generate signals which control motor speed. The direct current power supply is composed of a power battery having secondary c

In an electric car drive system having a car drive motor powered by a mounted direct current power supply, a control system including a signal generating means is provided to generate signals which control motor speed. The direct current power supply is composed of a power battery having secondary cells connected to the motor and an energy battery formed by fuel cells connected in parallel to said power battery via an energy battery control switch. The electric car drive system is composed of a charge control means which charges the power battery using the energy battery if the charge of the power battery is below the specified value when said key switch is turned off, and suspends charging if the charge is equal to or greater than the specified value. A battery current and voltage control controls a voltage increasing circuit connected between the energy battery and the power battery based on the current or voltage of any one of the power battery, energy battery or motor and keeps the voltage of the direct current power supply within a specified range.

대표청구항 ▼

[ What is claimed is:] [1.] In an electric car drive system having a car drive motor powered by a mounted direct current power supply, and a control system including a signal generating means to generate signals which control said motor speed;wherein said direct current power supply comprises:a powe

[ What is claimed is:] [1.] In an electric car drive system having a car drive motor powered by a mounted direct current power supply, and a control system including a signal generating means to generate signals which control said motor speed;wherein said direct current power supply comprises:a power battery having secondary cells connected to said motor;a voltage increasing circuit; andan energy battery comprising fuel cells connected in parallel to said power battery via said voltage increasing circuit;the electric car drive system further comprising:battery current and voltage control means which controls said voltage increasing circuit based on the current or voltage of any one of said power battery, said energy battery and said motor, and which keeps the voltage of said direct current power supply within a specified range, including charge control means which charges said power battery using said energy battery when the charge of said power battery is below a specified value, and suspends charging of said power battery when said charge is equal to or greater than the specified value.