Device for controlling output voltage of ac magneto generator

Claim 2

A voltage control device comprising an ac generator having an output coil, a lamp as a load connected through a switch with said output coil of said generator, a battery connected through a rectifying circuit with said output coil of said generator, a thyristor connected with the output terminals of said generator, and a control circuit to control said thyristor, wherein said control circuit has two voltage detecting means, the first of which detects the terminal voltage of said battery and the second of which detects the voltage applied to said lamp, and wherein said thyristor is controlled by the signal from said second voltage detecting means when said switch is closed and by the signal from said first voltage detecting means when said switch is open.

Claim 3

A voltage control device as claimed in claim 1, wherein said control circuit has a switching element to drive said thyristor and said switching element is controlled by said second voltage detecting means when said switch is closed and by said first voltage detecting means when said switch is open.

Claim 4

A voltage control device as claimed in claim 2, wherein the detecting terminal of said first voltage detecting means is connected with the terminal of said battery while the detecting terminal of said second voltage detecting means is connected between said lamp and said switch.

Claim 5

A voltage control device and claimed in claim 2, wherein the detecting terminal of said first voltage detecting means is connected between said rectifier and said output coil of said generator while the detecting terminal of said second voltage detecting means is connected between said lamp and said switch.

Claim 6

A voltage Control device as claimed in claim 2, wherein said first voltage detecting means has a voltage divider consisting of resistors and the detecting terminal of said second voltage detecting means is connected through a diode with said voltage divider.

Claim 7

A voltage control device comprising an a.c. generator having an output coil, a lamp as a load connected through a switch with said output coil of said generator, a battery connected through a rectifying circuit with said output coil of said generator, a first control means which detects the voltage of said battery to deliver an output signal, a second control means which detects the voltage across said lamp to deliver an output signal, and a thyristor connected between the terminals of said output coil and being controlled by said output signals of said first and second control means, and wherein said first control means has a switching means so that said first control means ceases to deliver an output in response to the operation of said switching means when said switch is closed.

Claim 8

A voltage control device comprising an a.c. generator having an output coil, a lamp as a load connected through a switch with said output coil of said generator, a battery connected through a rectifying circuit with said output coil of said generator, a first control means which detects the voltage of said battery to deliver an output signal, a second control means which detects the voltage across said lamp to deliver an output signal, and a thyristor connected between the terminals of said output coil and being controlled by said output signals of said first and second control means, and wherein said first control means has a switching means so that said first control means ceases to deliver an output in response to the operation of said switching means when said switch is closed.

Claim 9

A voltage control device comprising: an AC generator having an output coil; a load lamp connected through a switch to said output coil of said AC generator; a thyristor connected across said output coil of said AC generator; a battery connected through rectifying means to said output coil of said AC generator; first voltage detecting means for detecting an output voltage of said rectifying means to thereby detect the charging condition of said battery; second voltage detecting means for detecting a voltage applied to said lamp; first switching means for triggering said thyristor in response to respective outputs of said first and second voltage detecting means; and second switching means for stopping the operation of said first voltage detecting means when the output of said AC generator is applied to said second voltage detecting means.

Claim 10

A voltage control device comprising: an AC generator having an output coil; a load lamp connected through a switch to said output coil of said AC generator; a thyristor connected across said output coil of said AC generator; a battery connected through rectifying means to said output coil of said AC generator; first voltage detecting means for detecting an output voltage of said rectifying means to thereby detect the charging condition of said battery; second voltage detecting means for detecting a voltage applied to said lamp; first switching means for triggering said thyristor in response to respective outputs of said first and second voltage detecting means; and second switching means for stopping the operation of said first voltage detecting means when the output of said AC generator is applied to said second voltage detecting means.

Claim 11

A voltage control device according to claim 8, wherein said first voltage detecting means includes voltage dividing resistors, said first switching means includes a first integrating capacitor connected to an input of said first switching means, the output of said second voltage detecting means is applied to the input of said first switching means, said second switching means includes a second integrating capacitor for integrating a voltage which is applied to said load lamp, an output of said voltage dividing resistors is reduced when said second integrating capacitor is applied with the voltage applied to said load lamp, and the output of said voltage dividing resistor is applied to the input of said first switching means through a diode which prevents an inverse current.

Claim 12

A voltage control device comprising: an AC generator having an output coil; a load and a switch connected in series across said output coil; a battery and a rectifier connected in series across said output coil; a controlled switching element having an input electrode, an output electrode and a control electrode, and having its input and output electrodes connected across said coil; first control means, responsive to the voltage supplied to said load from said coil by way of said switch, for providing a first control signal to the control electrode of said controlled switching element; second control means, responsive to the terminal voltage of said battery, for supplying a second control signal to the control electrode of said controlled switching element; and an additional controlled switching element connected between said control electrode and the outputs of each of said first and second control means.

Claim 13

A voltage control device comprising: an AC generator having an output coil; a load and a switch connected in series across said output coil; a battery and a rectifier connected in series across said output coil; a controlled switching element having an input electrode, an output electrode and a control electrode, and having its input and output electrodes connected across said coil; first control means, responsive to the voltage supplied to said load from said coil by way of said switch, for providing a first control signal to the control electrode of said controlled switching element; second control means, responsive to the terminal voltage of said battery, for supplying a second control signal to the control electrode of said controlled switching element; and an additional controlled switching element connected between said control electrode and the outputs of each of said first and second control means.

Claim 14

A voltage control device according to claim 9, wherein said first control means comprises first and second resistors and first and second diodes connected in series across said load, and a capacitor connected across said second resistor, the output of said first control means being derived from the junction of said capAcitor, said second diode and said second resistor.

Claim 15

A voltage control device according to claim 9, wherein said second control means comprises a voltage divider network connected to one end of said rectifier and a switching circuit, responsive to the voltage across said voltage divider, for supplying a control signal to said additional controlled switching element.

Claim 16

A voltage control device according to claim 11, wherein said voltage divider network is connected to the junction of said rectifier and said battery.

Claim 17

A voltage control device according to claim 11, wherein said voltage divider network is connected to the junction of said rectifier and said coil.

Claim 18

A voltage control device according to claim 11, wherein said switching network comprises a Zener diode and a transistor circuit connected to said voltage divider and a diode connected between said Zener diode and said additional controlled switching element.