초록 ▼

Magnetic bodies for reducing electromagnetic wave noises are mounted to a battery voltage supplying terminal for supplying of an electric source power for the operation of circuits to an IC chip of a regulator or an internal electric source line for connection of the terminal to the regulator chip.

Magnetic bodies for reducing electromagnetic wave noises are mounted to a battery voltage supplying terminal for supplying of an electric source power for the operation of circuits to an IC chip of a regulator or an internal electric source line for connection of the terminal to the regulator chip. The magnetic bodies are attached to an IG ON terminal for inputting into the regulator chip a voltage signal caused by opening and closing of an ignition switch or to an IG ON detection line for connection of the terminal to the regulator chip. A bypass capacitor is connected to a battery voltage detecting terminal for inputting a change of battery voltage into the regulator chip, or to an internal battery voltage detection line for connection of the terminal to a switching transistor control circuit unit.

대표청구항 ▼

Magnetic bodies for reducing electromagnetic wave noises are mounted to a battery voltage supplying terminal for supplying of an electric source power for the operation of circuits to an IC chip of a regulator or an internal electric source line for connection of the terminal to the regulator chip.

Magnetic bodies for reducing electromagnetic wave noises are mounted to a battery voltage supplying terminal for supplying of an electric source power for the operation of circuits to an IC chip of a regulator or an internal electric source line for connection of the terminal to the regulator chip. The magnetic bodies are attached to an IG ON terminal for inputting into the regulator chip a voltage signal caused by opening and closing of an ignition switch or to an IG ON detection line for connection of the terminal to the regulator chip. A bypass capacitor is connected to a battery voltage detecting terminal for inputting a change of battery voltage into the regulator chip, or to an internal battery voltage detection line for connection of the terminal to a switching transistor control circuit unit. The battery charging system as claimed in claim 1, wherein said battery charging system is mounted in a vehicle that includes an engine and a starter; said generator comprises a plurality of phase windings; said output power limiting circuit limits peak voltage of one of said phase winding within battery voltage of said battery when said engine is started by said battery. 8. The battery charging system as claimed in claim 4, wherein said output power limiting circuit cuts said field current to stop generation of said output power. 9. The battery charging system as claimed in claim 5, wherein said generator control unit comprises a load responsive control unit for limiting said field current when said generator is connected to said electric load and when said activation means switches said output power limiting circuit from its activating state to deactivating state. 10. A generator control unit for a generator with use of a battery comprising: a duty-ratio detecting means for detecting a duty ratio of a command pulse signal; an output power limiting circuit for limiting output power of said generator; a voltage regulator for regulating said output voltage of said generator to a voltage proportional to said duty-ratio; and activation means for activating said output power limiting circuit to limit said output power of said generator when said duty-ratio falls within a predetermined ratio range. 11. The generator control unit as claimed in claim 10, further comprising a generator's rotation speed detecting circuit, wherein said activation means activates said output power limiting circuit to limit output power of said generator if said duty ratio falls in said predetermined ratio range and if said rotation speed falls in a predetermined speed range. 12. The generator control unit as claimed in claim 11, further comprising reference means for providing reference voltage that is proportional to said duty-ratio; wherein said voltage regulator regulates said output voltage by comparing said reference voltage with terminal voltage of said battery. 13. A battery charging system including a battery, a generator for charging said battery and an electric load, a generator control unit for controlling output voltage of said generator and a generator condition commanding unit for providing a generator condition command pulse signal, said generator control unit comprising: a duty-ratio detecting means for detecting a duty-ratio of said command pulse signal; a reference voltage generating means for providing reference voltage that is approximately proportional to said duty-ratio between a maximum value and a minimum value of said duty ratio and is fixed at said maximum and minimum values; and a voltage regulator including means for comparing said reference voltage with terminal voltage of said battery. 14. The battery charging system as claimed in claim 13, wherein said reference voltage generating means is disposed where ambient temperature changes relative to temperature of said battery so that said reference voltage can be set according to said ambient temperature when said duty-ratio is in a range near said maximum value or said minimum value. 15. The battery charging system as claimed in claim 13, wherein said generator condition commanding unit comprises: means for calculating a duty-ratio of said command pulse signal according to at least one of a battery charge condition, a vehicle speed and a throttle valve position in synchronism with a clock signal; and a pulse signal generator including a switching circuit and means for holding on-off state of said switching circuit; whereby content of said means for holding is changed by said means for calculating a duty-ratio in synchronism with said clock signal to change said on-off state of said switching circuit, thereby generating said command pulse signal. 16. The battery charging system as claimed in claim 15, wherein said command puls