JPS584499A - Ac power source flash unit - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a flashing device for an AC power source, and is used, for example, in a direction indicator point reduction device for a small motorcycle driven by a magneto.

Conventionally, most common flashing devices operate on DC battery power. However, a flashing device is required even in a vehicle that does not have a battery and only has an AC power source.It is desirable that this flashing device has most of the same structure as the DC flashing device.

Further, it is desirable that the rectifier be small and also have a voltage adjustment function since the output voltage of the magneto fluctuates.

In view of these demands, the inventor initially performed full-wave rectification of the output of the magneto using a diode, and then used a Zener diode to create a constant pulsating voltage by converting the rectified DC voltage into a constant pulsating voltage.
Furthermore, this pulsating voltage is smoothed with a smoothing capacitor, and this smoothed DC voltage is applied to a DC flashing device.

However, with this device, the rectifier circuit is large and the Zener diode generates a lot of heat, increasing the cost, and when it is incorporated into a DC flashing device, the entire flashing device becomes extremely large, making it virtually impossible to incorporate it. Met. D The present invention is equipped with an extremely small rectifier, and operates normally regardless of output voltage fluctuations of the alternator and even though a battery is not installed in the vehicle.
The purpose of this is to provide a flashing device for one AC power source that is extremely compact overall.

To this end, the present invention has the structure of a rectifier circuit having a thyristor and a constant voltage diode that controls the gate input of the thyristor as a circuit that performs rectification and voltage adjustment, and a capacitor is provided on the output side of the rectifier circuit. The main purpose of this paper is to focus on and specify the time constant of a discharge circuit formed by a capacitor and a flashing relay coil in order to reduce the capacity of the circuit.

Examples will be described below.

In FIGS. 1 to 4 showing the first embodiment, reference numeral 1 denotes a magneto which serves as an AC power source, and is mounted on a small motorcycle not equipped with a tensioner.

Reference numerals 2, 3, and 4.5 are flashing lamps for direction indication.Left and right lamps 2.3 are provided at the front of the motorcycle, and left and right lamps 4.5 are provided at the rear.For example, when turning left, the front The left rung 2 and the rear left lamp 4 flash alternately, and the front left lamp 2 lights up and goes out, then the rear left lamp 4 lights up and goes out, and then the front left lamp 4 lights up and goes out. 06, where rung 2 on the left of the section lights up, is a relay contact that connects and disconnects the lamp current, and is composed of a switching contact. 7 is a relay coil that drives one point of the and cl sill by electromagnetic force. This relay coil 7 is connected to a transistor 8.
9.10 and capacitor 11.

12 and resistors 13, 14, 15, 16, 17.

Its own excitation current is interrupted by a semiconductor oscillation circuit 9 consisting of 18.

20 is a rectifier circuit, and a case 21 (with one blinking device)
4) and is mounted on the same substrate 22 as the semiconductor oscillation circuit 190 component.

The rectifier circuit 20 controls the ignition input supplied to the thyristor 25, a contact holding capacitor 26 provided on the output side of the thyristor 25, and the gate of the thyristor 25 in accordance with the output voltage value of the magneto-1. It has a constant voltage diode 27.

The power stored in the contact holding capacitor 26 is consumed by the semiconductor oscillation circuit 19 and the relay coil 7, but the power consumption of the semiconductor oscillation circuit 19 is extremely small and can be ignored. Because of this, the voltage across the contact holding capacitor 26 also pulsates, but the capacitance of the capacitor 26 is determined so that this pulsating voltage C) @ low value VL (Fig. 2) does not fall below the contact open voltage of the relay coil 7. If this capacitance is too large, the size of the capacitor 260 will increase, so the capacitor 4! The capacity of j26 must be at least a value that ensures the operation of the flashing device (ToJ), and it must be of a suitable thickness.

Next, the operation will be explained.

First, the condition for turning on the thyristor 25 is that the voltage between the gate and cathode of the thyristor 25 is equal to or higher than the gate trigger voltage (approximately IV).

Here, the output terminal voltage of magneto-1 is 0, and the voltage between the gate of thyristor 25 and the upper terminal is VG.

The forward voltage of the diode 3r is vD1 The voltage across the resistor 310 is V*s The Zener voltage of the voltage regulator diode 27 is Vz
Let the voltage across the N capacitor 26 be VC.

Moreover, the output terminal voltage vO of magneto-1 is the voltage of thyristor 25.
The OVO state is defined as vO〉0 when the voltage on the anode side of is higher than the anode side potential of the Zener diode 27. There are three states when vO is 0, when vO=00, and when vO>0. Conceivable.

Hereinafter, the operation of the thyristor 25 will be explained for each state. It is assumed that the thyristor 25 is normally in a QFF state.

(1) When VO<0 Cyrisk 25 did not turn on.

(2) When Vo-00 Thyristor 25 is not turned on.

(3) When V O > O, the following two states are possible ◎ (3-1) VO≦yz ...... When (1), V o -V D + V c +V c + V n
-=-(2) Here, Va: 0 (because the current does not flow at all tl), VO-VD+VG+VC・--・-・
・(2)'ThK, V c -V o -V G -V
D −−−−−−−(2) 'In this state, VG≧VG d...
...(3) @) VGT is the gate trigger voltage (approximately IV
), the thyristor 25 is turned on.

According to formula (2) 5, Vc≦Vo-Vct-VD-=-<4), and when the charging voltage of the capacitor 26 is the voltage expressed by formula (4), the thyristor 25 is in the ON state, and V O) V C This ON state continues during (5), and the capacitor 26 is charged.

(However, the forward voltage drop of the thyristor 25 is ignored.

) Me, VO-VC・・・・・・・・・・・・・・・(6)
When this happens, the thyristor 25 is turned off again.

Next, , K , (3-2) V o > V z
-= , -, (7) Throat, the constant voltage diode 27 breaks down, 'yO-VR+VZ-...(8
)V z -V n + Va + V C...--
--(9), °, V c -V z -(VD+Vc
)----・(9)' In this state, VG≧V G T-・・・・・−・・−・(A) @VG
When T is a gate trigger voltage (approximately IV), the thyristor 25 is turned on.

From equation (9) 5, this state is V c −Vz −(VD+VC); 1i=Var・
-----(13) From this, V CS Vz-VD-VG T (V)----=-
The thyristor 25 is turned ON only in the states of C10 (7) and (12).

Also, from this, V c > Vz-VD-var r-=-,,, ---
-,,, (In 13, the thyristor 25 is not ONL. When the thyristor 25 is turned on, the power supply voltage vO becomes Vo>Vc...
-...- (to), the ON state is maintained and the capacitor 26 is charged.

VO-VC・・・・・・・・・・・・・・・・・・
......(g), the thyristor 25 is
It becomes FF state ◇Here, relay coil 7 of 11 flashing device
The semiconductor oscillation circuit 19 is a device that operates with DC power, and if there is charge in the capacitor 26, it operates using that charge.

When these devices 7 and 19 operate, the charge in the capacitor 26 is discharged, which is determined by the load resistance RL of these devices 7 and 19 and the capacitance CC of the capacitor 26. Capacitor 26 with time constant TCR
The voltage VcO value across the terminal becomes smaller. And load resistance R
L can be considered to be substantially equivalent to the resistance value of the relay coil 7.

The value of VC becomes smaller, and the state 11 of equation (4) or (12)
When this occurs, the thyristor 25 is turned on again, and when the capacitor 26 is charged, the thyristor 25 is turned off when the condition Q or equation (15) is reached.

Said device 7.19 is a turn signal switch 40°41
As long as the device 7.1 is connected to one of the lamps, it is always in operation, and the electric charge stored in the capacitor t26 is always connected to the device 7.1.
Thyristor 25 is OFF because it is being discharged through 9.
Then, the voltage VC of the capacitor t26 decreases by nine.

The voltage waveforms of the operation of the rectifier circuit 20 of the present invention as described above are shown in FIGS. 2 and 3.

In this waveform diagram, the peak voltage of power supply voltage VO is assumed to be yp.

(1) When vp≦Vz, from the conditions of equations (1) and (4), as shown in FIG. has a value closer to VP. This means that the rectifier circuit 20 functions as a rectifier circuit with the same efficiency as half-wave rectification.

Qi) VP>VzO and e In this case, from the conditions of (1), (ship formula, (7), and (12)), the size IJ and X25 are v as shown in Figure 3.
It does not turn on all the positive voltage waveforms of O (, V c
The function is to select the time for KOH so that yz is close to yz. This indicates that the rectifier circuit 20 functions as a constant voltage power supply with yz as the regulation voltage.

As is clear from these voltage waveform diagrams, the larger the capacity of the contact holding capacitor 26C) and the greater the resistance value of the 9-L coil 7, the more gradually the voltage drop curve 40 (Figure 2) when the capacitor 26 is discharged decreases. Therefore, capacitor 26
The lowest value VL of the voltage across the terminal becomes larger.

As long as this minimum voltage VL is greater than the contact open voltage (VOP) of the relay coil 7, the blinking operation will be performed normally.

Note that the contact opening voltage yop is the voltage at which the relay contact 6 opens from the right side when the voltage across the relay coil 70 is decreased after the relay contact 6 is turned on from the right side. In reality, the capacitance of the capacitor 26 is 250
C#F).

Figure 4 is an internal layout diagram of the flashing device for AC power supply.
G is a diode, 31 is a resistor, 27 is a constant voltage diode, and 45 is a capacitor connected between the gate and cathode of the thyristor 25. It eliminates the

26 is a contact holding capacitor, diameter 11 (cm)
A shed with a height of about 2 (ell) is fine. 6.7 is a relay and is the same as that used for DC flashers.

And the outer diameter dimensions are width W = 39 (sw) height - H] = 5
1.5 (all), and compared to conventional DC-only flashing devices, the width W is the same and the height is only 10L days longer, allowing for an extremely compact configuration. This is because the capacitance of the contact holding capacitor 2°6 can be reduced due to the technical concept of the invention.

Next, the operation of the entire flashing device shown in FIG. 1 will be explained. In the state shown in FIG. 1, the relay coil 7 is not energized.
Now, if turn signal switches 40 and 41 are turned to the left, what is the output voltage of magneto-1? Gnetho 1
- Lamp 4 - Turn signal switch 40 - Terminal 50 - Thyristor 25 - Capacitor 26 - A current flows through the semiconductor oscillation circuit 19, and the semiconductor oscillation circuit 19 has a period determined by the time constant of the capacitor and resistor provided inside. The relay coil 7 is energized. When the relay coil 7 is energized, the relay contact 6 is closed to the right side, and the direction indicator lamp 4 disposed on the left side of the rear of the vehicle is turned on. Via contact 6 the output voltage of magneto 1 is subsequently applied to thyristor 25 .

Next, when the relay coil 7 is no longer fully energized, the relay contact 6 returns to the state shown in the figure. Thereafter, this is repeated, and the left side lamps 2.4 at the front and rear of the vehicle blink alternately.

Next, a second example will be described. In Figure 5,
In this embodiment, only the position of the rectifier circuit 20 is changed from the first embodiment, and the output of the magneto-1 is directly applied to the rectifier circuit 20 without passing through the relay contact and the lamp.
The output voltage of the GNETO 1 is constantly applied to the rectifier circuit 20.

In addition, in the above-described embodiment i, incorporating the rectifier circuit in one blinker case allows for miniaturization and also simplifies installation work on the vehicle.

In addition, by determining the capacitor capacity so that the voltage across the contact holding capacitor has a time constant that is greater than the discharge time constant so that the voltage across the contact holding capacitor does not drop below the relay contact open voltage of the relay coil, the contact can be maintained without impairing the blinking operation. It becomes possible to minimize the size of the holding capacitor.

Furthermore, by guiding the output of the alternator to the rectifier circuit through the filament of the rung, when the rung is broken or the turn signal switch installed in the front stage of the lamp is open, no voltage is applied to the rectifier circuit, and the necessary voltage is not applied to the rectifier circuit. Since the voltage is applied only when the voltage is applied, the power consumption of the circuit due to leakage current can be eliminated.

As described above, in the present invention, in an FKVK vehicle equipped with a battery, it is possible to operate the flasher normally even if the voltage of the alternator fluctuates rapidly depending on the rotation speed of the vehicle engine. In addition, the overall shape of the blinker can be made extremely small and inexpensive. Additionally, vehicles that are not equipped with this kind of battery are compact and inexpensive, but since the flashing device is installed in such a vehicle, it is necessary that the flashing device itself be small and inexpensive. The present invention, which satisfies these needs, is extremely excellent.

[Brief explanation of drawings]

FIG. 1 is an electric circuit diagram showing a first embodiment of the device of the present invention, FIGS. 2 and 3 are voltage waveform diagrams during operation of the circuit illustrated in FIG. 1, and FIG. 4 is a diagram showing the circuit illustrated in FIG. FIG. 5 is an electric circuit diagram showing a second embodiment of the device of the present invention. 01...AC generator, 2-5...
Lamp, 6... Relay contact, 7... Relay coil,
9. Body oscillation circuit in half. 20... Rectifier circuit, 26... Contact holding capacitor. 25-... Thyristor, 27... Constant voltage diode-'
)', 21-flasher case. Representative Patent Attorney Takashi Okabe 5

Claims (1)

[Claims] An alternating current generator (1) that constitutes an alternating current power source for a vehicle that does not have a single battery;
2 to 5), the blinking device comprises a relay contact (2 to 5) that blinks a rung load current.
6), and a semiconductor oscillation circuit (1) that intermittently energizes the relay coil (7).
9), and a rectifier circuit (20) that supplies power to the semiconductor oscillation circuit (19) and energizing power to the relay coil (7), and rectifies the output of the alternator (1). In the rectifying circuit (20), the rectifying circuit (20) rectifies the output of the alternating current generator (1), and also includes a thyristor (25) that cycles on and off to charge the contact holding capacitor v (ze) of its own output stage. and a constant voltage diode (27) that allows an ignition input to be supplied to the gate of the thyristor (25) when the output voltage of the alternator (1) is below a set voltage; and the thyristor (25). The relay is connected between the relay coil (<7) and the semiconductor oscillation circuit (19), and the voltage across the relay itself does not drop below the relay contact open voltage of the relay coil (7). A flashing device for an AC power supply, characterized in that the contact holding capacitor (26) has a capacitance equal to the resistance value of the coil (7).2. Cyrisk (25), constant voltage diode (27), and contact holding capacitor (2)
6) is characterized in that the semiconductor oscillation circuit (19), the relay coil (7) and the relay contact (6) are housed together in a blinker case (21). The AC power flashing device according to the first item 03 is characterized in that the rectifier circuit (20) is supplied with power from the alternating current generator (RI) via the lamps (2 to 5). An AC power supply flashing device according to claim 1 or 2.