JPS58154338A - Charging generator controller - 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 charging generator control device, and in particular, it detects and detects abnormal conditions by being equipped with a switching device and a diagnostic device.
Along with the display, by the oscillator.

This invention relates to a charging generator control device that controls on/off the switching device and supplies an initial excitation current with a constant average value. First, a conventional device of this kind will be described as shown in FIG. 1.

In the figure, (1) is a three-phase alternating current generator installed in a vehicle (not shown) and driven by an engine (not shown), with an armature coil (101) and a field coil (
102). (21 is a full-wave rectifier that performs full-wave rectification of the AC output of the generator (1).

(201), (202), and (203), respectively. A second rectifier output terminal and a ground terminal (3) are voltage rectifiers that control the output voltage of the power generation m1 (1) to a first predetermined value by controlling the field current flowing through the field coil (102). The device consists of the following parts.

・In other words, (301) is a surge absorption diode connected to both ends of the field coil (102), (302) (
303) is a Darlington-connected power transistor that interrupts the current flowing through the field coil (+02);
(304) is a resistor that constitutes the base circuit of the transistor (302) (sos), (305) is a control transistor that controls on/off of the transistor (:402) (303), (306) is the power generation 11 ( 1) A Zener diode that detects the voltage at the second rectified output terminal (202) and becomes conductive when the output voltage reaches a first predetermined value.

(307) (30B) are resistors connected in series to form a voltage divider circuit, (300) is a charging indicator (
6) is an initial excitation resistor that is connected in parallel with the indicator light (6) and can supply an initial excitation current to the power generator (1) even if the indicator light (6) is disconnected. The operation of the conventional device configured as described above will be explained, with reference to (4) as a storage battery and (6) as a zero-order key switch. First, when starting the engine, press the key switch (5).
When the storage battery (4) is closed, the transistor (302) (3
A pace current is supplied to the transistor (302).
) (303) is conductive. The transistor (302)
(303) conducts, the storage battery (4), key switch (5), charge indicator light (6), resistor (309), field coil (102), transistor (302) (so3
) via.

A field current flows through the field coil (102), and a field magnetomotive force is generated.

When the engine is started in this state and the generator (1) is driven, AC output is induced in the TLS child coil (101) according to the rotation speed, and the output layer full-wave rectifier (2) generates an AC output. waves are rectified. Here, when the armpit rectification output is less than the first predetermined value, the voltage dividing point potential of the voltage dividing circuit constituted by the resistor (307) (3os) is still low, so the Zener diode (306) is in a conductive state. does not reach this state and maintains a non-conducting state,
The supply of field current is maintained, so that the output voltage of the generator (1) increases as the rotational speed increases. After that, the rotation speed of the generator (1) increases rapidly,
When the output voltage exceeds the first predetermined value, the voltage dividing point potential of the voltage dividing circuit becomes high.
) conducts through the zener diode (306),
A pace current is supplied to the transistor (305), and the transistor (305) becomes conductive. Scissors 2/Jista (30
5) conducts, the transistor (302) (30B
) is quickly cut off, the current flowing through the field coil (102) is quickly cut off, and the output voltage of the generator (1) is reduced. When this output voltage drops to the first predetermined value, the Zener diode (306) and the transistor (305) become non-conductive again.

The transistors (302) and (303) become conductive, the field coil (lo2) is energized, and the output voltage of the power generator all (1) rises again.

By repeating the above-described operation, the output voltage of the generator (1) is controlled to the first predetermined value, and the storage battery (4) is charged with this controlled voltage. At this time,
The output voltage % of the second rectified output terminal (202) almost reaches the first predetermined value, and the potential difference with the storage battery (4) almost disappears, so the charging indicator (6) goes out and the storage battery ( 4) Displays the charging status.

However, in the conventional device described above, if a part of the excitation circuit is disconnected, the charging indicator light (6) does not light up even if the generator wt@ (1) is in a non-generating state. For this reason.

Not knowing when the battery is not charging, leading to the battery dying.
Or the 1st JIH! It had drawbacks such as the output end (2ol) coming off and the uncontrolled state being unclear. This invention is
The present invention provides an excellent charging generator control device that eliminates the above drawbacks.

An embodiment of the present invention shown in FIGS. 2 to 7 will be described below.

In Figure 2, (7) is a commonly used oscillator, and (8) is a switchgear.69 At the start-up of the generator (1), an initial excitation current with a constant average value that can be changed is set. It is supplied to the field coil (102), and when the excitation circuit is disconnected and the switchgear (8) is turned on (according to the command from the oscillator (7)), the voltage of the second rectified output end (202) can be set to any value. . The parts configuration is as follows.

That is, (SOl) is a series control transistor (80
2) IiM) connected in series to the emitter terminal of the transistor. Maximum initial excitation current setting resistor (803) is a reverse current blocking diode during power generation, (804) (80
5) are connected in series with each other, and the voltage setting terminal (ssoy)
The resistor that makes up the voltage divider circuit for setting the voltage (son
) is a diode that transmits on/off commands from the oscillator (7) to the switching device (8), and (807) is a voltage setting terminal.

Q. (b) is a Darlington connected transistor that is connected in series between the charge indicator light (6) and ground and is a nine-open and closed element, and (9) is a diagnostic device that detects abnormal conditions and Transistors (2) (b) are made conductive and the charging indicator light (6) is turned on.
) and is composed of the following parts.

(903) is a Lysoglu absorption capacitor, (904)
is the inrush current and incorrect wiring dark current limiting resistance when charging indicator light (6) is lit, (905) (sos) is the OR (theory m)
sum) connected diodes, (90)) is the diode (
A resistor (90g) connected to the base circuit of the transistor (2) (b) through the resistor (905) is connected to the second commutator output terminal (202) when the voltage is below the second predetermined value that defines no power generation. The transistor (909) is turned off and conducts by passing a pace current to the transistor @ (b) through the resistor (907) and diode (905).
The second rectifier output end (20
2) Zener diodes (910) and (911), which become conductive when the voltage exceeds a second predetermined value, are connected in series to form a voltage divider circuit for the second rectifier output terminal (202) voltage. The resistor (912) is the second rectified output end (202
) Zener diodes (913) and (914) are connected in series with each other and constitute a voltage divider circuit for the voltage at the second rectified output terminal (202), which are conductive when the voltage is equal to or higher than a third predetermined value that defines no control. At the same time, when the voltage at the second rectified output terminal (202) is equal to or higher than the third predetermined value that defines no control, a pace current is passed to the transistor (B) through the Zener diode (912) and the diode (906). Resistor-1 (91B), which flows and conducts, is a diode that lights up the charging indicator (6) when the wiring between the key switch and the connection point of the charging indicator (6) and the transistor (801) is open. It is.

The operation of an embodiment of the apparatus of the present invention constructed as described above will be explained.

First, when the key switch (6) is closed when starting the engine, the key switch (6)%) run resistor (801), resistor (802), diode (
803).

Field coil (102), transistor (302) (3
03), a field current flows through the field coil (1o2) and generates a field magnetomotive force. At this time, the transistor (8
01) is a diode (806) by the oscillation device (7).
), it is always on/off.

Figure 3 shows the oscillation waveform output from the oscillator (7),
The figure shows the initial excitation current waveform supplied to the field coil (102). In the figure, the field current flows through the transistor (801) due to the influence of the inductance of the field coil (102).
When it is on, it increases sequentially, and when it is off, it sequentially decreases through the surge absorption diode (301). FIG. 5 shows the waveform of the initial excitation current supplied from the storage battery (4) when the transistor (801) is on, and FIG. 86 shows the voltage waveform of the second rectified output terminal (202) when no power is generated.

In the switchgear (8), the resistance between the voltage setting terminal (807) and the ground terminal is determined by the value of the resistor (805) and the field coil (1o
2) A parallel composite resistance value is obtained by multiplying the resistance value and the series composite value of the resistor (802) by the current amplification factor of the transistor (SOl). For this reason, the parallel combined resistance value and resistance (804)
The voltage at the voltage setting end (807) is determined by the ratio of . In the excitation circuit, when the 211th output terminal (202) to the ground terminal are open, the voltage at the voltage setting terminal (807) is set to a value below a second predetermined value that defines no power generation. Transistor (
The maximum value of the initial excitation current flowing through got ) is.

It is determined by the following calculation. That is, the voltage setting end (80
7) Voltage: The voltage between the transistor (got) and the emitter of the diode (803). Resistance (802)
The current value is divided by the composite value of . Further, the average value of the initial excitation current is set by the oscillation frequency of the oscillation device (7).

Since the voltage at the voltage setting terminal (807) is set below the second predetermined value when the excitation circuit is disconnected, the zener diode (909) of the diagnostic device (9) becomes non-conductive during startup. , the transistor (908) is turned off. Turn off the transistor (908) and turn off the transistor α1)
OJJ is supplied with pace current through the resistor (907) and diode (905) and conducts, and the charging indicator light (6)
lights up. Next, when the engine starts, the generator (1) generates electricity, and the voltage regulator (3) controls the voltage to the first predetermined value, the charging indicator light (6) goes out.

In this state, the field coil (102
), the transistor CBO2) (303), and the wiring cause an open failure, the voltage at the second I output terminal (202) will have the waveform shown in FIG. Under the above conditions, the voltage at the voltage setting terminal (807) is set to be equal to or lower than the second predetermined value even when the transistor (801) is on. Therefore, when the voltage at the second rectified output terminal (202) does not fall below the second predetermined value, the charging indicator light (6) lights up in the same way as at startup, indicating the non-power generation state. Bureau.

Transistor (so8), Zener diode (909
), a similar effect can be obtained by a circuit using a comparator. Next, due to a failure of the voltage regulator (3) or the like, the output voltage of the generator (1) cannot be controlled to the first predetermined value.

When the storage battery (4) exceeds the third predetermined value, which constitutes overcharging,
21i constituted by resistors (913) (914)
The voltage dividing point voltage of the voltage dividing circuit of the output terminal (202) voltage also rises...:・1 Due to the rise in voltage, the Zener diode (912) becomes conductive, and the transistor 0 passes through the diode (906).
1) Supply a pace current to all to make them conductive and turn on the charging indicator light (6). 9, the first rectified output end (201
) has come off, etc. When the generator (1) is generating power but the storage battery (4) is not charged, the first and second rectifier output ends (201) (202) has
A voltage waveform shown in FIG. 7 is output. At this time, as shown in FIG. 7, there is a period in which the value is equal to or greater than the third predetermined value.

During this period, the Zener diode (912) is conductive, and the transistor (2) (b) is intermittently supplied with a pace current through the diode (SOS). However, due to the function of the capacitor (SOS), the transistor (to) (
b) is always conductive and the charging indicator light (6) lights up. .

Note that the same effect can be obtained by using a circuit using a comparator for the Zener diode (912).

Also, regarding the resistor (802), the voltage setting end (807
), the same effect can be obtained by lowering the voltage, or by omitting it.

7K"-")f,,,zo+Affit"ゞ(6)(ri* 1lli1"When the wiring to the collector of the multi-tri resistor (801) is open, the storage battery, (4)),
Key switch (5) % charge indicator light (6), diode (
A pace current flows through the transistor (2) (b) through the resistor (907) and the diode (905). By supplying this current, the transistor QO (2) becomes conductive and lights up the charging indicator light (6).

As mentioned above, in this device, there is no power generation, no control, and the first rectified output end (
2'01) Detects abnormality such as disconnection and charging indicator light (6)
is lit. That is, no power generation is detected by setting the voltage at the voltage setting end (807) to always be below the second predetermined value, and no control is detected by setting a third predetermined value. .

Next, if the first rectified output end (201) is off, it is detected by using the fact that the third predetermined value is exceeded for a certain period of time.

As a result, when no power is generated and! It is effective in preventing the battery from dying when the J1 rectifier output end (201) is disconnected, and in preventing overcharging of the storage battery (4), destruction of the electric load, and failure when uncontrolled.

Regarding the initial excitation current, the oscillator (7) controls the transistor (801) on and off to keep the average value of the current flowing through the field coil (102) constant.

This method stabilizes the start-up characteristics and reduces heat generation in the switchgear (8).

As described above, this invention can detect and display abnormalities in the generator (1) with a simple circuit configuration, and generates little heat, so the effects can be achieved with a small and inexpensive device. .

[Brief explanation of the drawing]

Fig. 1 is an electrical circuit diagram showing a conventional device, and Fig. 2 is an electrical circuit diagram showing a conventional device. An electric circuit diagram showing one embodiment of this invention, ``Figure 3 is a second embodiment of the present invention.
The oscillation device shown in the figure (the oscillation waveform of
FIG. 5 shows the initial excitation current waveform flowing through the transistor (801) shown in FIG. 2, FIG. 6 shows the voltage waveform of the second rectified output terminal (202) during no power generation shown in FIG. 2, and FIG. When the first rectified output end (201) is off during power generation as shown in FIG. This is the voltage waveform of the second rectified output terminal (201) (202). In the figure, (1) is an alternating current generator, (1O1) is an armature coil, (102) is a field coil, (2) is a full-wave rectifier, (
(201) is the first rectified output terminal, (202) is the second rectified output terminal, (203) is the ground terminal, (3) is the voltage regulator, (4
) is a storage battery. (5) is a key switch, (6) is a charging indicator, (7) is an oscillator, (8) is a switchgear, (9) is a diagnostic device, Ql
) Ql is a transistor. In the drawings, the same reference numerals indicate the same or similar parts. Agent Makoto Hirano-':: Figure 3 Figure 5 Figure 6 Figure 7 7111tm7)

Claims (1)

[Claims] The AC output induced in the armature coil of the charging generator is rectified, and the first. a rectifier having a second rectifier output end and a ground terminal; a storage battery charged by the output of the first rectifier output end of the rectifier; excited by the output of the second rectifier output end of the rectifier; a field coil of the charging generator; a voltage regulator that controls the output voltage of the generator to a predetermined value by intermittent current flow to the field coil; a key between the storage battery and the ground terminal; Multiplication table 1 connected in series through a switch! It indicator light, a switching element connected in series to the indicator light and the grounding terminal, a diagnostic device that detects an abnormal state of the charging generator and makes the switching element conductive, the key switch and the second rectified output. A charging oscillator"*II control device comprising a switching device connected between the terminal and the switching device, and an oscillation device for controlling on/off of the switching device.