JPH049024B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is a charging generator that is equipped with a diagnostic device to detect abnormal conditions such as no power generation, no control, or deviation from the first rectified output end. The present invention relates to a charging generator control device for displaying.

[Conventional technology]

First, a conventional device will be explained as shown in FIG. 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 connected in a three-phase star shape.
and a field coil 102. 2 is a full-wave rectifier that performs full-wave rectification of the AC output of the generator 1;
01, 202, and 203 are the first and second rectified output ends and ground terminals, respectively; 3, the output voltage of the generator 1 is controlled by controlling the field current flowing through the field coil 102, and the storage battery 4, which will be described later; The terminal voltage is detected and controlled to a reference adjustment value V ₁ , and if the storage battery 4 terminal voltage cannot be detected, the voltage of the second rectified output terminal 202 is adjusted to an adjustment value V ₂ higher than the reference adjustment value V ₁ .
This is a voltage regulator that controls the voltage and is composed of the following parts. That is, 301 is the field coil 10
A surge absorption diode connected to both ends of 2,
Reference numerals 302 and 303 refer to Darlington-connected power transistors that turn on and off the current flowing through the field coil 102, and 304 refer to the transistors 302 and 30.
305 is a control transistor that controls on/off of the transistors 302 and 303, 306 is a Zener diode connected to the base terminal of the control transistor 305, and 307 and 308 are logically connected to each other. , a diode whose connection point is connected to the cathode terminal of the Zener diode 306, 309 and 310 are connected in series with each other, and resistors 311 and 312 are connected in series with each other to form a voltage divider circuit for the voltage at four terminals of the storage battery. , a resistor forming a voltage divider circuit for the voltage of the second rectified output terminal 202, 4 a storage battery, 5 a key switch,
6 is a charging indicator light.

Next, the operation of the apparatus configured as above will be explained. First, when the key switch 5 is closed when starting the engine, the key switch 5,
A base current is supplied to the transistors 302 and 303 via the charging indicator light 6 and the resistor 304, and the transistors 302 and 303 become conductive. When the transistors 302 and 303 become conductive, the power is transferred from the storage battery 4 to the key switch 5, the charging indicator light 6, and the field coil 10.
2. A field current flows through the field coil 102 via the transistors 302 and 303, and a field magnetomotive force is generated. When the engine is started in this state and the generator 1 is driven, the armature coil 10
1 induces an alternating current output, and this output is full-wave rectified by a full-wave rectifier 2. Here, when the voltage at the four terminals of the storage battery charged by the rectified output is less than the reference adjustment value _V1 , the voltage dividing point formed by the resistors 309 and 310 is still low, so the zener diode 306 is in a conductive state. However, the non-conducting state is maintained, and the supply of field current is maintained, so that the output voltage of the generator 1 increases as the rotational speed increases. After that, when the rotational speed of the generator 1 further increases and the output voltage becomes equal to or higher than the above-mentioned reference adjustment value _V1 , the potential at the voltage dividing point of the voltage dividing circuit constituted by the resistors 309 and 310 also increases, diode 3
Since the potential applied to the zener diode 306 through 07 also increases, the zener diode 306
conducts through the zener diode 306,
A base current is supplied to the transistor 305, and the transistor 305 becomes conductive. The transistor 3
When 05 becomes conductive, the base potential of the transistor 303 decreases, and then the base potential of the transistor 302 also decreases, so the transistors 302 and 3
03 becomes non-conductive, the current flowing through the field coil 102 is cut off, and the output voltage of the generator 1 decreases. The output voltage of this generator 1 is the standard adjustment value
When the voltage drops to V ₁ , the voltage dividing point potential of the voltage dividing circuit consisting of resistors 309 and 310 becomes low, so the Zener diode 306 becomes non-conductive again, and the base current of the transistor 305 is cut off, so the transistor 305 becomes non-conductive. Since the base potential of the generator 303 is restored, the transistors 302 and 303 become conductive, the field coil 102 is energized, and the output voltage of the generator 1 increases again.

By repeating the above-described operation, the output voltage of the generator 1 is controlled to the above-mentioned reference adjustment value _V1 , and the storage battery 4 is charged with this controlled voltage. Moreover, at this time, the output voltage of the second rectified output terminal 202 also becomes almost the standard adjustment value V ₁ , and the potential difference with the storage battery 4 is almost eliminated, so the charging indicator light 6 turns off and displays the charging state of the storage battery 4. . At this time, if the storage battery 4 voltage cannot be detected due to the wiring between the storage battery 4 and the resistor 309 being disconnected, the second
The rectified output terminal 202 voltage is detected by resistors 311 and 312, and the second rectified output terminal 202 voltage is controlled to an adjusted value V ₂ higher than the reference adjusted value V ₁ .

[Problem to be solved by the invention]

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 1 is in a non-generating state. For this reason, there are disadvantages in that the non-charging state is not known, leading to a dead battery, or the uncontrolled state is not known, and if the second rectified output terminal voltage increases due to no control, the charging indicator light may be destroyed.

Furthermore, since the initial excitation current is supplied through the charge indicator light 6, the generator 1 also has the disadvantage of poor start-up characteristics.

The present invention provides an excellent charging generator control device that eliminates the above drawbacks with a simple circuit configuration.

[Means to solve the problem]

A charging generator control device according to the present invention includes a rectifying device having a rectifying output end and a ground terminal for rectifying an alternating current output induced in an armature coil of a charging generator, a storage battery charged by the output of the rectifying device, and a storage battery charged by the output of the rectifying device. A field coil of the charging generator, one end of which is connected to a storage battery, is excited by the output of the storage battery when the charging generator starts up, and is excited by the output of the rectified output end after startup, and detects the terminal voltage of the storage battery. The rectified output terminal voltage is controlled to a reference adjustment value by intermittent current flowing to the field coil by a semiconductor switching element connected to the other end of the field coil, and the terminal voltage of the storage battery is adjusted. If the voltage cannot be detected, a voltage regulator that controls the rectified output terminal voltage to a predetermined adjustment value that is higher than the reference adjustment value, and a charging indicator connected in series between the storage battery and the ground terminal via a key switch. A light, a switching element connected in series between the indicator light and the grounding terminal, detecting the voltage at the rectified output terminal to detect an abnormal state of the generator, and making the switching element conductive or non-conductive. The diagnostic device includes a diagnostic device that controls blinking of the charging indicator light, and the diagnostic device has a transistor that makes the switching element conductive or non-conductive by an on-off operation, and the rectified output terminal voltage is equal to or less than a set value that defines no voltage. or when the value exceeds the set value that specifies no control, the switching element is made conductive and the charging indicator light is lit; when the value exceeds the set value that specifies no control, the switching element is made non-conductive and charging is performed. The present invention is characterized in that the transistor is controlled to turn off the indicator light.

[Effect]

With such a configuration, an abnormality in the charging generator can be detected and reliably indicated by the charging indicator lamp, and the abnormality can be displayed with a simple circuit configuration.
Furthermore, since the initial excitation current can be passed directly from the storage battery to the field coil, the start-up characteristics of the generator can be improved.

〔Example〕

An embodiment of the present invention will be described below with reference to FIG.

In FIG. 2, 3 is a voltage regulator;
13, when the key switch 5 is closed, a second
314 is a resistor that sets the base current of the first transistor; 315 is a resistor driven by the transistor 715 of the generator 1;
When the voltage rises, the resistor 7 that supplies the base current to the transistors 302 and 303 is a diagnostic device that detects an abnormal state such as no power generation, no control, or disconnection of the first rectified output terminal 201, and turns on the charging indicator light 6. Turn it on. The parts configuration is as follows. 701 is a transistor for driving the charging indicator 6; 702 is a capacitor for stabilizing the operation of the transistor 701;
03 is the charging indicator light 6 and the transistor 70
1 is connected in series between the transistors 701 and 1 to limit the current flowing through the transistor 701 when the charge indicator lamp 6 is turned on, and to control the voltage at point A when the key switch 5 is closed to the point necessary for turning on the second transistor 715, which will be described later. A resistor 704 is connected to the base terminal of the transistor 701 to set the voltage.
5 is turned off when the above-mentioned abnormal condition is detected, and the base current flows to the transistor 701 through the resistor 704.
A transistor 706 to be made conductive is connected to the base terminal of the transistor 705, and a Zener diode 707, 7 to be made non-conductive when an abnormal state is detected.
08, 709 are connected in series with each other to form a voltage divider circuit for the voltage of the second rectified output terminal 202; 710 is the second rectified output terminal 202;
A transistor that becomes conductive when the voltage exceeds a reference adjustment value V ₁ or a set value V ₄ that defines no control, 7
11 is a ripple absorption capacitor, 712 is a Zener diode connected to the base terminal of the transistor 710, and conducts when the voltage of the second rectified output terminal 202 is equal to or higher than a set value V ₄ that defines no control;
13 and 714 are resistors connected in series with each other and forming a voltage dividing circuit for the voltage of the second rectified output terminal 202;
When the voltage dividing point potential is equal to or higher than the potential corresponding to the set value _V4 that defines no control, the zener diode 712
conducts. 715 is a second transistor that drives the first transistor 313 when the key switch 5 is closed; 716 is the second transistor 71;
A resistor 717 connected to the base current of 5 is a diode that lights up the charging indicator 6 when the wiring from the storage battery 4 to the connection point of the resistor 309 and the resistor 704 is open.

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

First, when the key switch 5 is closed when starting the engine, the second rectified output end 20 immediately after that is closed.
2 voltage is the start-up of generator 1, so there is no power generation, so the value is less than the standard adjustment value _V1 , and the value is less than the set value _V3 , which specifies no power generation, so the zener diode 706 is non-generating. Since the transistor 705 is conductive and no base current is applied to it, it is in an off state. When the transistor 705 is turned off, the transistor 701 is supplied with a base current through the resistor 704 and becomes conductive. The transistor 701
Due to the conduction, current flows from the storage battery 4 through the key switch 5, the charge indicator light 6, the resistor 703, and the transistor 701, so that the charge indicator light 6 is turned on. At this time, the voltage at point A is the voltage at the second transistor 715.
The resistor 703 is set to a value sufficient to turn on the resistor 703. The voltage at point A is about 1V because it is necessary to brightly light the charging indicator light 6. The second transistor 715 is supplied with a base current via a resistor 716 and becomes conductive. Due to the conduction of the second transistor 715, the first transistor 3
13 is supplied with a base current through a resistor 314 and becomes conductive. As the first transistor 313 becomes conductive, the transistors 302 and 303 are supplied with base current through the circuit including the storage battery 4, the first transistor 313, and the resistor 315, and are made conductive. coil 102,
A field current flows through the circuit of the transistors 302 and 303, and a field magnetomotive force is generated. Here the first and second
The reason why the transistors 313 and 715 are provided will be described below. When the key switch 5 is closed as described above, a current flows through the path of charging indicator 6, point A, resistor 703, and transistor 701, and charging indicator 6 lights up, but the voltage at point A is as described above.
It is about 1V. Therefore, in order to switch in response to the closing of the key switch 5, this minute voltage is required.
A switch means driven at about 1V is required,
For this reason, a pair of first and second transistors 313 and 715 that operate even at low voltages is provided.

That is, when the key switch 5 is closed, a voltage as low as about 1V is generated at the point A, but even with this minute voltage, the transistor 715 is reliably reacted and switched, and the conduction of the transistor 715 causes the first transistor to be turned on. 313 becomes conductive and the field coil 102 is energized.

Next, when the engine starts and the generator 1 completes startup and generates electricity, the output voltage at the 4 terminals of the storage battery of the generator 1 is adjusted to the standard by the voltage regulator 3 as in the conventional device shown in FIG. is controlled by the adjustment value V ₁ . At this time, due to the output of the second rectified output terminal 202, the divided voltage at point B is higher than the potential corresponding to the voltage _V3 that defines no power generation of the generator 1, so the Zena diode 706 becomes conductive. , supplies base current to transistor 705, so transistor 705 turns on and transistor 701
Since the base current of the generator 1 is cut off, the charging indicator light 6 goes out to display the power generation status of the generator 1. This state is the normal operating range shown in FIG. 3c. In this state, if the storage battery 4 terminal voltage cannot be detected due to an open wiring between the resistor 309 and the storage battery 4, the resistors 311 and 312
The operation of detecting the 02 voltage and controlling the voltage of the second rectified output terminal 202 to an adjusted value V ₂ higher than the reference adjusted value V ₁ is the same as the conventional one.

Next, the field coil 102 which is part of the excitation circuit
If an open failure occurs in the transistors 302 and 303 or the wiring, the voltage at the second rectified output terminal 202 will be lower than the set value V ₃ that defines no power generation because the generator 1 will not generate power, and the potential at point B will be low. So,
Zena diode 706 becomes non-conductive, turning off transistor 705, so transistor 701
Since the base current is now supplied to the transistor 701, the transistor 701 is turned on, and the charging indicator light 6 lights up in the same way as at the time of startup, indicating the non-power generation state. This state corresponds to the non-power generation lighting range shown in FIG. 3d.
In addition, due to a failure of the voltage regulator 8, the output voltage of the generator 1 cannot be controlled to the standard adjustment value or the adjustment values V ₁ and V ₂ higher than the standard adjustment value, and the storage battery 4 is overcharged, which stipulates no control. When the set value V ₄ is exceeded, the second rectified output terminal 2 consisting of resistors 713 and 714
The voltage dividing point voltage of the voltage dividing circuit of the 02 voltage also increases. The increase in voltage causes zener diode 712 to conduct, turning transistor 710 on. Therefore, point C is grounded and the zener diode 706
becomes non-conductive, and transistor 705 turns off. As a result, the transistor 701 is connected to the resistor 704.
A base current is supplied through the battery, which makes it conductive and lights up the charging indicator light 6. This state corresponds to the uncontrolled lighting range shown in FIG. 3b. Here, when the voltage of the second rectified output terminal 202 increases and exceeds the set value _V5 , which is higher than the set value that defines no control, the voltage at point B increases and the transistor 705 is turned on.
01 is turned off, the charging indicator light 6 is turned off.
This state is the uncontrolled light-off range shown in FIG. 3a. As a result, the indicator light 6 and the transistor 70
Destruction of item 1 can be prevented.

Next, when the generator 1 is generating electricity but the storage battery 4 is not charged due to the disconnection of the first rectified output end 201, the first and second rectified output ends 201
There is a period in which the voltage generated at 01 and 202 is equal to or higher than the set value V ₄ that defines no control.

During this period, Zener diode 712 is conductive and transistor 710 is intermittently supplied with base current. However, due to the function of the capacitor 711, the transistor 710 is always conductive, and the charging indicator light 6 is turned on as in the case of no control.

As detailed above, in the device of this embodiment, the charging indicator light 6 is turned on by detecting abnormalities such as no power generation, no control, and disconnection of the first rectified output end 201, which could not be detected in the conventional method. . That is,
Regarding no power generation, when no power is generated, the second rectified output end 2
It is detected when the 02 voltage becomes less than the set value _V3 that defines no power generation. Furthermore, regarding non-control, a set value _V4 that defines non-control is provided and detected. Next, when the first rectified output end 201 is off, it is detected by using the fact that it exceeds a set value V ₄ that defines no control for a certain period of time. As a result, it is effective to prevent the storage battery 4 from rising to the rising state when no power is generated or when the first rectified output end 201 is disconnected, and to prevent overcharging of the storage battery 4 and destruction of the electric load and failure when no control is performed. In addition, a set value _V5 higher than the set value that defines no control is provided to turn off the charging indicator light 6, which has the effect of protecting the indicator light 6 and the transistor 701 from destruction. FIG. 3 shows the charging indicator 6 for the voltage of the second rectified output terminal 202.
Indicates the status of

Next, as shown in FIG. 2, abnormalities can be detected and displayed with a simple circuit configuration, which has the effect of making the device compact and inexpensive.

Furthermore, since the initial excitation current to the field coil 102 is passed directly from the storage battery 4, there is an effect that the start-up characteristics of the generator 1 can be improved compared to the conventional system in which the current is passed through the charging indicator light 6.

Note that the same effect can be obtained even if the diagnostic device 7 is configured by a circuit using a comparator.

In addition, in the above embodiment, if the storage battery 4 terminal voltage cannot be detected and cannot be controlled to the reference adjustment value V ₁ , the voltage at the second rectified output terminal 202 is set to an adjustment value V higher than the reference adjustment value V ₁ . ₂ , but it does not necessarily have to be high.
If it is the same as V ₁ or greater than V ₁ , there will be no problem in control.

Further, in the above embodiment, the full-wave rectifier has two rectified output ends 201 and 202, but it goes without saying that the same operation can be expected even if these are common and only one rectified output end is provided.

〔Effect of the invention〕

As described above, the present invention provides a rectifying device having a rectifying output end and a ground terminal for rectifying the alternating current output induced in the armature coil of a charging generator, a storage battery charged by the output of the rectifying device, and a storage battery having one terminal connected to the rectifying device. is connected to the field coil of the charging generator, which is excited by the output of the storage battery when the charging generator starts up, and is excited by the output of the rectified output end after the charging generator starts up, and detects the terminal voltage of the storage battery, The rectified output end voltage is controlled to a reference adjustment value by intermittent current flowing to the field coil by a semiconductor switching element connected to the other end of the field coil, and the storage battery terminal voltage cannot be detected. In this case, a voltage regulator that controls the rectified output terminal voltage to a predetermined adjustment value that is higher than the reference adjustment value, a charging indicator light connected in series between the storage battery and the ground terminal via a key switch, and the A switching element connected in series between the indicator light and the ground terminal detects the voltage at the rectified output terminal to detect an abnormal state of the generator, and makes the switching element conductive or non-conductive to display the charging display. Equipped with a diagnostic device that controls blinking lights.
The diagnostic device has a transistor that makes the switching element conductive or non-conductive by an on/off operation,
When the rectified output terminal voltage is less than the set value that specifies no-voltage, or exceeds the set value that specifies no-control, the switching element is made conductive, the charging indicator light is turned on, and the set value that specifies no-control is set. When the voltage exceeds the set value, the transistor is controlled so that the switching element is rendered non-conductive and the charging indicator light is turned off. Therefore, it is possible not only to display the non-generating state of the generator and the non-controlled state, but also to display the non-controlled state. When the set value exceeds a predetermined set value, the charging indicator light is turned off, which has the effect of protecting the charging indicator light from destruction. Furthermore,
This has the effect of improving the start-up characteristics of the charging generator.

[Brief explanation of drawings]

FIG. 1 is an electric circuit diagram showing a conventional device, FIG. 2 is an electric circuit diagram showing an embodiment of the present invention, and FIG. 3 is a charging indicator light 6 for the voltage of the second rectified output terminal 202.
FIG. In the figure, 1 is an alternating current generator, 101 is an armature coil, 102 is a field coil, 2 is a full-wave rectifier, 2
01 is the first rectified output end, 202 is the second rectified output end, 203 is the ground terminal, 3 is the voltage regulator, 30
2, 303 is a semiconductor switching element, 313 is a first transistor, 4 is a storage battery, 5 is a key switch, 6
is a charging indicator, 7 is a diagnostic device, 701 is a switching element, 715 is a second transistor, V ₁ is a reference adjustment value, V ₂ is an adjustment value higher than the reference adjustment value, V ₃
is a set value that defines no power generation, V ₄ is a set value that defines no control, and V ₅ is a set value that is higher than the set value that defines no control. In addition, in the figures, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Claims] 1. A rectifying device having a rectifying output end and a ground terminal for rectifying the alternating current output induced in the armature coil of a charging generator, a storage battery charged by the output of the rectifying device, one end of which is connected to the storage battery, and the above-mentioned charging When the generator starts up, it is excited by the above storage battery output,
After rising, the field coil of the charging generator excited by the output of the rectified output terminal and the terminal voltage of the storage battery are detected, and the current flowing to the field coil is connected to the other end of the field coil. The rectified output end voltage is controlled to a reference adjustment value by switching on and off using a semiconductor switching element, and when the storage battery terminal voltage cannot be detected, the rectified output end voltage is adjusted to a predetermined value higher than the reference adjustment value. a voltage regulator that controls the adjustment value, a charging indicator light connected in series between the storage battery and the ground terminal via a key switch, a switching element connected in series between the indicator light and the ground terminal, A diagnostic device detects the voltage at the rectified output terminal to detect an abnormal state of the generator, and controls the charging indicator light to blink by making the switching element conductive or non-conductive. It has a transistor that makes the switching element conductive or non-conductive, and when the rectified output terminal voltage is less than a set value that defines no-voltage, or exceeds a set value that defines no-voltage, the transistor that makes the switching element conductive and the above-mentioned A charging generator control device, characterized in that the transistor is controlled so as to turn on a charging indicator light and turn off the charging indicator light by making the switching element non-conducting when the value exceeds a set value that exceeds a set value that defines no control. .