JPS6158435A - Controller of charging generator - 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 [Field of Application of the Invention] The present invention relates to a control device for a charging generator, and particularly to a control device for a charging generator suitable for preventing engine stoppage of an automobile or the like.

[Background of the invention]

The conventional charging generator control device is disclosed in Japanese Patent Application Laid-Open No. 56-1077.
As described in No. 47, there is an example of detecting the acceleration/deceleration of the engine and switching the partial pressure ratio of the generated voltage detection circuit to improve the power performance and fuel efficiency of the engine. However, for this purpose it was necessary to install a special voltage regulator, and if the generator had a built-in normal voltage regulator, it would be necessary to replace the generator.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide a control device for a charging generator that can arbitrarily control the output simply by adding an external control device to a conventional charging port machine.

[Summary of the invention]

The present invention uses the storage battery voltage detection terminal of the voltage regulator and applies a voltage exceeding the regulation voltage to this terminal, thereby forcing the power generation plate to stop generating power.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to FIGS. 11 to 6. In Fig. 1, 1 is the armature winding of the generator, 2 is the main rectifier that converts the AC output of the armature winding 1 into DC, 3 is the auxiliary current tensioner that supplies the field current to the field converter 4, and 5 1 is a storage battery charged by a generator, 6 is a key switch, 7 is a charge indicator light, 8 is a resistor, 9 is an engine ignition device, and 10 is a control device. On the other hand, the voltage regulator built into the generator includes power transistors 11. Diode 12゜16
, resistors 13, 15a, 15b, 17, a Zener diode, and a transistor 18.

In the non-configuration, when the key switch 6 is turned on, the storage
From Kameike 5, charging indicator 7 and resistor 8, field winding 4,
Current flows through power transistor 11 to provide initial excitation. At this time, the engine is not rotating, the voltage applied to the storage battery voltage detection S terminal is low, and the transistor 18 is cut off. Next, when the engine starts rotating by eV, an excitation current flows from the auxiliary rectifier 3 to the field winding 4, self-excitation starts, and when the voltage across the charging indicator lamp 7 becomes zero, the lamp goes out. As the rotation further increases, the voltage at the S terminal increases, and when it reaches a predetermined voltage, the Zener diode 14
, transistor 1B conducts, power transistor 1
1 blocks it. Then, the field current passes through the diode 12 and attenuates, and the output voltage decreases accordingly, so the voltage at the S terminal also decreases, and the Zener diode 14 and transistor 18 are cut off. By repeating the above operations, the voltage of the storage battery 5 is adjusted to a constant value. In the above, in the control device 10, the output terminal S1 of the switch means 22 and the storage battery voltage detection terminal S2 are short-circuited, and the voltage of the storage battery 5 is applied to the S terminal of the generator. FIG. 2 is a circuit block diagram of the control device 10, in which 21 is a switch means, and 22 is a DC voltage booster circuit.
-DC converter, 23 is a waveform shaping circuit, and 24 is a frequency detector.

23 shapes the primary voltage waveform of the ignition device 9 and outputs a pulse signal of a constant width for each ignition. 24 detects the frequency of the ignition pulse signal and switches the switch means within a certain frequency range.

On the other hand, the DC-DC converter 22 converts the storage battery voltage (for example, 14.
7V) is input, and a voltage higher than the storage battery voltage (for example, 18V) is input.
．． 0V) is always output. The frequency detector 24 outputs the following output signal in accordance with the engine rotational speed [N (r, p, m).

When N < N l, Vo = r OJNs
When ≦N≦N2 Vo=rlJN>N2 When Vo=[Q,j Also, the switch means 21
acts to connect S2 and Sl when Vo is rOJ,
When Vo is "1", the output of the DC-Dci converter 22 is 81
Works to connect to a terminal. In such a configuration, when the engine rotation range is between Nl and N2, a voltage higher than the storage battery voltage is applied to the S1 terminal, and the Zener diode 14 and transistor 18 of the voltage regulator become conductive. , the power transistor 11 is cut off.

Therefore, when the engine speed is between N1 and N2, the charging generator stops generating electricity. In addition to the storage battery 5, various electrical loads (not shown) are connected to the charging generator.

Since power generation stops when the rotational speed is between N1 and Nzt, the driving torque of the charging generator is reduced, and the load on the engine is reduced. Now, the idle speed of an engine is 600 r,
Let p, m and Nt = 10 Or, p, m.

Suppose that N2 = 55 Or, p, mK is set. If the engine speed were to drop unexpectedly due to the operation of the power steering device, for example, and the engine would normally stop, this embodiment detects the drop in engine speed and generates power for charging. It is possible to cut the machine's output and prevent the engine from stopping.

FIG. 3 is a circuit diagram showing one embodiment of a DC-DC converter circuit. In FIG. 3, 221 is an astable multi-vibrator circuit that always oscillates at a constant frequency. 222
is a coil, and a transistor 223 repeatedly turns on and off according to the signal from the astable vibrator 221. The moment the transistor 223 is turned off from conduction, the coil 2
A back electromotive force is generated at 22, and a voltage is stored in capacitor 226 through diode 227.

When the voltage stored in the capacitor 226 becomes high, the Zener diode 225 and the transistor 224 become conductive.
Transistor 223 is cut off, and no voltage is generated in coil 222. In this way, the output voltage is controlled to a constant voltage higher than the storage battery.

FIG. 4 shows an embodiment of the waveform shaping circuit 23. According to the circuit shown in FIG. 4, 1 of the ignition system.

The next voltage is shaped and a pulse of constant width as represented by the F terminal is output.

Next, FIG. 5 shows an embodiment of the frequency detector 24. In FIG. In FIG. 5, 241 is a smoothing circuit which outputs an average voltage proportional to the engine speed.

242 is a window comparator circuit that outputs "1" for input voltages within a certain range, and otherwise outputs "1".
0" is output.

FIG. 6 shows an example in which the switch means 21 is constructed from an electronic circuit. In FIG. 6, when vo=l'-oj, transistors 211 and 213 are cut off, transistor 212 is turned on, and PNP type transistor 215 is not turned on.
S2 and Sl are electrically connected. Next ■. = "1", the transistor 211 is conductive, j7 and the PNP type transistor 214 are conductive, and S3 and 81 are connected.

According to one embodiment of the present invention having the above configuration, it is possible to detect an inadvertent decrease in the engine speed and prevent the charging generator from stopping.

Furthermore, since the output of the generator can be controlled arbitrarily, fuel efficiency and power performance can be improved.

〔Effect of the invention〕

According to the present invention, a simple external control device is added to a conventional charging generator.The drawing of the generator shows an embodiment of the present invention. Control circuit diagram, FIG. 2 is a detailed diagram of the control device in FIG. 1, FIG. 3 is a detailed diagram of the DC-DC converter in FIG. 2, FIG. 4 is a detailed diagram of the waveform shaping circuit in FIG. 2, 5 is a detailed diagram of the frequency detector of FIG. 2, and FIG. 6 is a detailed diagram of the switch means of FIG. 2.

DESCRIPTION OF SYMBOLS 10... Control device, 21... Switch means, 22.
...DC-DC converter (boosting circuit), 23... Waveform shaping circuit, 24... Frequency detector.

Claims (1)

[Claims] 1. A charging power generation device comprising a storage battery that is charged by a charging generator that outputs output in accordance with the rotation of an engine, and a voltage regulator that detects the voltage of the storage battery and controls the voltage to a constant value. In the control device of the engine, a step-up circuit which inputs the voltage of the storage battery and outputs a voltage higher than the input voltage is connected between the storage battery and the voltage detection terminal of the voltage regulator, and a control signal that outputs according to the operating state of the engine. A control device for a charging generator, comprising a control device having a switch circuit that selectively applies the voltage of the storage battery or the output of the booster circuit. 2. A control device for a charging generator according to claim 1, wherein the control signal detects the rotational speed of the engine and is switched depending on the rotational speed or acceleration. 3. In claim 1, the booster circuit is D.
A control device for a charging generator characterized by being a C-DC converter.