KR100461130B1 - AC generator output control device - Google Patents

Abstract

The present invention relates to an output control device of an alternator, the conventional generator and charging system (CHARGING SYSTEM) does not automatically increase the output current of the generator when the electrical load consumed is sharply discharged and In order to overcome the problem of starting up and to overcome this problem, the capacity of the installed generator has to be increased and replaced. In the present invention, the engine ECU 20 detects the amount of current FR TERM detected from the field coil 16 of the alternator. ) And the signal of the amount of current of the regulator (G TERM) is inputted to saturate if the state of saturation (100%) lasts for a predetermined time, and to classify the case when the set reference value is exceeded, and when the idle speed actuator 30 is exceeded. And controlling the injector 22 to gradually increase the engine's ALPM and at the same time the amount of current in the field coil 16 is less than 100%. It is configured to automatically control the current amount FR TERM of the field coil 16 and the current amount of the regulator G TERM so that the discharge and start-up of excessive battery 40 can be automatically prevented. will be.

Description

Output control device of alternator

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an output control device of an alternator, and in detail, allows a field coil to detect when a power generation capacity generated from an alternator is less than an electric load consumed in a vehicle, and according to the detected result, The present invention relates to an alternator output control device capable of increasing the engine's ALPM and preventing excessive battery consumption without increasing the capacity of the installed generator.

In general, generators applied to automobiles are alternators (full-wave rectified three-phase alternators) driven by a V-belt from the crank pulley of the engine, and the power generation capacity is installed depending on the engine speed, and the electric load is higher than the alternator generation amount. In many cases, it is provided to supply a shortage from the battery so as not to interfere with the operation.

In addition, since the generator is driven by the engine, the power output of the generator varies greatly with the wide variation in the number of rotations used.The generator and the battery are charged according to the electric load, the driving environment, the driving condition and the driver's usage method. As the situation changes, the biggest challenge is to select the capacity of the generator and battery, how to minimize the shape and weight and balance the system with low power loss.

In general, high-end passenger cars with large displacements are equipped with a large number of electrical components, so the power consumption is large.

1 is a circuit diagram showing an example of the principle of the conventional alternator (alternator). Since the full-wave rectifier circuit is incorporated in the three-phase synchronous generator, the theoretical no-load induced voltage of the synchronous generator E = K × ∮ × N (where K is The constant determined by the structure, ∮ is the magnitude of the magnetic flux, N is the number of revolutions).

That is, the output voltage and current of the generator have the characteristic that the engine speed increases to a certain range as the engine speed increases, and when the engine speed is constant, the no-load output voltage saturates the magnetic circuit when the current supplied to the rotor flows a lot. Is also saturated.

As described above, the conventional alternator and engine ECU sense the on / off of the current flowing in the field coil in the starting state to control the regulator's reference voltage from 14.3 volts to 12.3 volts, and the load is momentarily increased. When it is detected from the field coil (FR TERM), the regulator's reference voltage is lowered to 12.3 volts so that the instantaneous power source is replaced by the battery, thereby reducing the engine ALPM.

Therefore, the conventional alternator installed in the vehicle increases the capacity of the generator in order to increase the performance of the charging system as the electrical load consumed by the vehicle is gradually increased, or when the electrical load suddenly changes from the battery. The use of the charged current prevents the dropping of the ALPM of the engine, but it does not exclude the case in which the above-described phenomenon continues and the case in which the battery is discharged due to insufficient power by the discharged battery is frequently turned off.

In other words, the conventional generator and charging system does not automatically increase the output current of the generator when the electrical load consumed increases sharply, resulting in the discharging and starting of the battery to be turned off. There was a cumbersome problem of replacing the generator by increasing the capacity.

Therefore, the present invention has been made in order to solve the problems described above, when the electric load consumed in the vehicle is increased and the amount of generated current is automatically increased to increase the engine ALPM to increase the output current value of the generator The purpose of the present invention is to provide a generator and charging system that can automatically eliminate the discharge of the battery and stop the start-up.

Therefore, the present invention integrates the signal of the current amount FR TERM detected from the field coil of the alternator and the current amount of the regulator G TERM when the saturated state (100%) lasts for a predetermined time. The amount of current in the field coil is discerned by discerning the case where the set reference value is exceeded, and controlling the idle speed actuator and injector when the reference value is exceeded, while automatically increasing the ALMP of the engine and automatically controlling the field coil current to be less than 100%. It is characterized in that the current amount of the FR TERM and the regulator G TERM is controlled so as to automatically prevent the excessive battery discharge and start-up.

Referring to the drawings illustrating the configuration of the present invention for achieving the above object is as follows.

2 is a schematic circuit diagram for explaining the operating state of the alternator 10 and the engine ECU 20 to which the present invention is applied, and FIG. 3 is a signal input of the alternator 10 according to the present invention. A schematic operation configuration diagram of the engine ECU 20 for automatically controlling the PM is shown.

That is, in the present invention, in order to discriminate the case where the amount of current generated from the generator is insufficient due to the electrical load consumed by the operation of the electric component installed in the vehicle and the engine, the engine ECU 20 is configured to use the field coil 16 of the alternator. The signal of the current amount FR TERM detected from the current amount G TERM detected from the regulator 12 is inputted.

In addition, the engine ECU 20 discriminates when the current amount FR TERM of the field coil 16 and the current amount G TERM of the regulator 12 are saturated (100%) for a predetermined time or more. The amount of current detected is integrated and the case where the accumulated value exceeds the set reference value is discriminated so that the amount of current generated by the consumed electrical load is insufficient.

In addition, the engine ECU 20 outputs a control signal when the amount of current generated by the electrical load consumed as described above is insufficient, in particular, the output control signal to gradually increase the engine ALPM. In order to control the idle speed actuator 30 and the injector 22 in order to automatically control.

Accordingly, the engine ECU 20 to which the present invention is applied duty-controls the current amount FR TERM of the field coil 16 and the current amount G TERM of the regulator 12 so that the current value is always less than 100%, rather than being saturated. When the battery 40 is discharged by the electrical load consumed by automatically adjusting the rotation speed of the engine and the electrical load is rapidly increased, the rotation of the engine is dropped and the starting is stopped. It is configured to prevent.

Actions and effects on the configuration of the present invention described above are as follows.

According to the present invention, the signal of the current amount FR TERM detected from the field coil 16 input to the engine ECU 20 and the signal of the current amount G TERM detected from the regulator 12 are caused by the electrical load consumed. When the amount of current generated from the generator is insufficient, it becomes saturated and serves to discern this.

In addition, the engine ECU 20 which inputs a signal of the current amount FR TERM detected from the field coil 16 of the alternator and the current amount detected from the regulator G TERM inputs the field coil 16 according to the set logic. When the current amount (FR TERM) of the regulator and the current amount (G TERM) of the regulator 12 are saturated (100%) lasts for a predetermined time or more, the fractionation is performed by integrating the detected current amount. By discriminating the case when the reference value is exceeded, it is possible to determine the case where the amount of generated current is insufficient.

In addition, the idle speed actuator 30 and the injector 22, which are controlled by the control signal output from the engine ECU 20 and gradually increase the engine ALPM, thereby increasing the output current value generated from the generator, are each trttle. By automatically adjusting the opening degree of the valve and the amount of injected fuel, the current amount FR TERM of the field coil 16 and the current amount G TERM of the regulator 12 are controlled in duty so that the current value is not always saturated. The engine speed is automatically adjusted to less than%.

Accordingly, the engine ECU 20 to which the present invention is applied duty-controls the current amount FR TERM of the field coil 16 and the current amount G TERM of the regulator 12 so that the current value is always less than 100%, rather than being saturated. When the engine 40 is discharged by the consumed electrical load and the electrical load is suddenly increased, the engine rotation is dropped and the starting is stopped. It acts to be automatically prevented.

As described above, the alternator and charging system to which the present invention is applied has a problem of increasing the capacity of the generator, which is increased by increasing the electric load consumed as the vehicle is advanced, and dropping and starting of the engine when the electric load suddenly increases. By being able to solve the phenomenon at the same time, it is possible to reduce the cost and increase the added value to increase the merchandise.

1 is a circuit diagram of an example showing the principle of a conventional alternator.

Figure 2 is a schematic circuit diagram for explaining the operating state of the alternator and engine E.C.U. to which the present invention is applied.

3 is a schematic operation configuration diagram of an engine E.C.U. for automatically controlling the ALPM of an engine by inputting a signal of an alternator according to the present invention;

** Explanation of Signs of Major Parts of Drawings **

10: alternator (AC generator) 12: regulator

14 stator coil 16 field coil

20: engine E.C.U. (invention) 22: injector

30: idle speed actuator 40: battery

50: ignition switch 60: charge lamp

70: load

B, L, S, G, FR: Alternator output terminal

Claims (1)

The amount of current of the field coil controlled by the engine ECU for inputting signals of the amount of current FR TERM detected from the field coil of the alternator and the amount of current detected from the regulator G TERM, and the control signal output from the engine ECU In the output control apparatus of an alternator comprising an idle speed actuator and an injector which increases the output current value of the generator by automatically controlling the engine speed so that the current amount (G TERM) of the regulator and the regulator (G TERM) are always less than 100%, The engine ECU accumulates the amount of current detected when the input current amount of the field coil and the current amount of the regulator are saturated for a predetermined time, and discriminates when the integrated value exceeds a set reference value. By the output control device of the alternator, characterized in that configured to be able to discriminate when the generator output current value is insufficient.

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