KR19990027631A - Generation control device of automobile - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle power generation control device capable of preventing an overshoot of an unnecessary engine R.P.M while preventing an engine stop caused by the rotational force of a generator by gradually charging a rechargeable battery when an electric load is input. Rotor based on the operation of the engine, and the stator for rectifying and outputting the alternating voltage generated by blocking the magnetic line of the rotor coil and the rotor coil unit is selectively excited according to whether the closed loop is formed and generates the magnetic force line When the feedback voltage applied is less than the predetermined reference voltage, the coil unit forms a closed loop of the rotor coil unit, and if it is large, a voltage comparison unit for blocking the closed loop, and a generated voltage from the stator coil unit connected in parallel with the battery. A voltage regulator which selectively divides the voltage based on the voltage adjustment pulse and outputs the feedback voltage; It includes a power generation control unit that detects the presence or absence of negative closed loops for a predetermined period and outputs a voltage adjustment pulse having a duty ratio corresponding to the closed loop formation rate, thereby preventing the engine from stopping without additional engine compensation when an electric load is input. In addition, the R.P.M. (RPM) of the engine rises sharply to prevent unnecessary overshoot of the R.P.M engine.

Description

Generation control device of automobile

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle power generation control device, and in particular, by gradually charging a rechargeable battery when an electric load is input, an R.P.M. (RPM) of the engine rapidly rises, thereby causing an unnecessary overshoot of the engine. It relates to a vehicle power generation control device to prevent overshoot.

In general, an alternator in a vehicle is generated by using a rotational force of an engine resulting from driving of the vehicle, and is used as a charging device for supplying power to power of various electric devices and simultaneously charging a battery.

On the other hand, Figure 1 is a circuit diagram for such a conventional generator, the battery 10, the ignition switch 20, the charge warning light 30, the voltage comparator 40, the rotor coil 50, the stator (Stator) The coil part 60 and the voltage adjusting part 70 are included.

In the same figure, the battery 10 is a battery for charging a vehicle, and supplies electric power required for an electric load, and the ignition switch 20 is connected to the positive terminal of the battery 10 and according to whether the switch is opened or closed. Outputs power selectively.

In addition, the charge warning light unit 30 is provided with a warning light and a relay is selectively turned on / off based on the potential difference between the relay diode, the voltage comparator 40 is a voltage to be described later to maintain a constant output voltage of the generator The rotor coil L2 of the rotor coil section 50, which will be described later, is selectively excited in accordance with the comparison result between the feedback voltage from the adjusting section 70 and the preset reference voltage.

On the other hand, the rotor coil unit 50 rotates at the center of the stator coil unit 60, which will be described later due to the operation of the engine, and the rotor coil L2 is excited under the control of the voltage comparing unit 40 to excite the magnetic force lines. The stator coil unit 60 interrupts the magnetic force line of the rotor coil L2 to full-wave rectify and output the three-phase AC power generated by the stator coil L1 through a diode.

Then, the voltage adjusting unit 70 returns the generated voltage from the stator coil unit 60 connected in parallel with the battery 10, divides the voltage by a predetermined voltage, and applies it to the voltage comparing unit 40 at the feedback voltage.

Next, the operation process of the conventional power generation control device having the above-described configuration will be described.

First, when the ignition switch 20 is closed and the engine is stopped, the transistor Q2 of the voltage comparator 40 is turned on by the current from the battery 10, and the rotor coil L2 of the rotor coil part 50 is turned on. A current from the battery 10 is applied and a closed loop is formed again through the transistor Q2 of the voltage comparator 40 to excite the rotor coil L2.

At this time, the relay of the charge warning light unit 30 is driven to turn on the warning light.

Next, when the engine is started and the rotor coil L2 is rotated, since the stator coil L1 of the stator coil part 60 breaks the magnetic force line generated in the rotor coil L2, the three-phase AC voltage is applied to the stator coil L1. These three-phase AC voltages are full-wave rectified and output by the diodes (6).

Then, the voltage generated from the stator coil unit 60 rises, the potential difference across the relay of the charge warning lamp unit 30 disappears, so that no current flows in the coil of the relay, so that the warning lamp is turned off. Charging starts with the battery 10 when the generated voltage from the voltage becomes higher than the battery 10 voltage.

On the other hand, charging of the battery 10 is performed by constant voltage charging, and the voltage generated from the stator coil unit 60 must be adjusted so as to maintain a predetermined constant voltage (for example, about 14V).

Therefore, the generated voltage from the stator coil unit 60 connected in parallel with the battery 10 is fed back and divided by the resistors R4 and R5 of the voltage adjusting unit 70 to perform the Zener diode ZD of the voltage comparison unit 40. When the voltage generated from the stator coil unit 60 exceeds a predetermined constant voltage, the feedback voltage applied to the zener diode ZD also exceeds the breaker voltage of the zener diode ZD. Since the Zener diode ZD is subjected to Zener breakdown, the base current of the transistor Q1 flows through the Zener diode ZD, and the transistor Q1 is turned on.

At this time, the collector potential of the transistor Q1 maintained the potential so that the base current of the transistor Q2 flows, but since the transistor Q1 is turned on, the potential decreases rapidly and the base current of the transistor Q2 does not flow. Transistor Q2 is turned off.

Therefore, the exciting current of the rotor coil L2 of the rotor coil part 50 is cut off, and the voltage generated by the stator coil part 60 is lowered, that is, the control voltage is controlled so as not to exceed the predetermined constant voltage.

On the other hand, when the generated voltage of the stator coil unit 6 connected in parallel with the battery 10 is lower than the predetermined constant voltage, that is, fed back through the resistors R4 and R5 of the voltage adjusting unit 70, the voltage comparator 40 When the feedback voltage applied to the zener diode ZD of the lower side becomes lower, no current flows in the zener diode ZD, so that the transistor Q1 is turned off and the transistor Q2 is turned on, so that the rotor coil part 50 An electric current flows in the rotor coil L2 of), and the generated voltage of the stator coil part 60 rises again.

As described above, the transistors Q1 and Q2 are turned on and off by the operation of the zener diode ZD to interrupt the excitation current of the rotor coil part 50 to maintain the generated voltage at a predetermined constant voltage.

On the other hand, if the electric load (for example, a head lamp, a wiper, a power window, etc.) is applied during engine idle, the battery 10 is discharged by the electric load and the voltage of the battery 10 drops, and the rotor coil part 50 of the generator is immediately supplied. ) Is accelerated by rotation to generate power and charges the battery 10 with this generated voltage. At this time, when the rotational force of the generator (rotor shaft in which the rotor coil part 50 is formed) acts as a load of the engine and the load is suddenly large, the current engine output does not overcome the generator rotational force load and the engine is stopped. This may occur.

Therefore, in the related art, a separate electric load switch is provided in the electric load, and the engine output is compensated stepwise in response to the electric load by detecting that the electric load is applied based on the signal from the switch.

However, the engine stop due to the rotational force load of the generator was prevented by the compensation of the engine output, but the engine R.P.M. was unnecessarily sharply overpowered, causing an overshoot of the engine R.P.M.

Accordingly, the present invention provides a method of preventing overshoot of the engine R.P.M while preventing the engine from stopping by intermittently applying a load due to the generator rotational force to the engine by gradually charging the battery when the electric load is input. I was sought.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to slowly charge a rechargeable battery when an electric load is input, thereby preventing engine stoppage caused by the rotational force of the generator while avoiding unnecessary engine knowing. It is to provide a vehicle power generation control device that can prevent the overshoot of M.

The vehicle power generation control device according to the present invention for achieving the above object is a rotor coil portion that rotates based on the driving of the engine, and is selectively excited according to whether a closed loop is formed to generate magnetic lines of force, and the rotor coil portion. The stator coil unit rectifies the AC voltage generated by breaking the magnetic force line and outputs the generated voltage, and when the applied return voltage is smaller than the preset reference voltage, a closed loop is formed in the rotor coil unit. A voltage adjusting part for selectively dividing the generated voltage from the stator coil part connected in parallel with the battery in parallel with the voltage adjusting pulse and outputting it as a return voltage, and detecting the presence of the closed loop formation of the rotor coil part for a predetermined period. And a power generation control unit for outputting a voltage regulation pulse having a duty corresponding to the closed loop formation rate. It is characterized by.

On the other hand, the voltage adjusting unit grounds the voltage generated from the stator coil unit connected in parallel with the battery in series with the first, second and third resistors, the collector is connected between the second and third resistors, and the emitter is connected to the ground. Is connected to and is selectively turned on / off based on a voltage adjustment pulse applied to the base to output a potential between the first and second resistors as a feedback voltage, including a transistor to remove / include the third resistor value. It is done.

1 is a circuit diagram of a power generation control device of a conventional vehicle.

2 is a circuit diagram of a power generation control apparatus for a vehicle according to the present invention.

Explanation of symbols for main parts of the drawings

10: battery 20: ignition switch

30: charge warning light 40: voltage comparison

50: rotor coil portion 60: stator coil portion

70: voltage adjusting unit 80: power generation control unit

The above objects and various advantages of the present invention will become more apparent from the preferred embodiments of the invention described below with reference to the accompanying drawings by those skilled in the art.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 is a circuit for a power generation control apparatus for a vehicle according to the present invention, which includes a battery 10, an ignition switch 20, a charge warning light unit 30, a voltage comparator 40, a rotor coil unit 50, and a stator. The coil unit 60, the voltage adjusting unit 70, and the power generation control unit 80 are included, and other components are the same as the above-described conventional power generation control apparatus, and thus description thereof is omitted, and the voltage adjusting unit 70 which is the main component of the present invention. It will be described with reference to the power generation control unit 80.

First, the voltage adjusting unit 70 feeds back the generated voltage from the stator coil unit 60 connected in parallel with the battery 10, and is connected to the first, second, and third resistors R4, R5, and R6 in series to ground. And a NPN transistor Q3 having its collector connected to the ground between the second resistor R5 and the third resistor R6, and described later in the base of the transistor Q3. The voltage adjusting pulse from the controller 80 is applied to selectively turn on / off the transistor Q3, and the voltage comparison unit (d) is used as a feedback voltage to convert the potential between the first resistor R4 and the second resistor R5 to a feedback voltage. 40).

In addition, the power generation controller 80 senses whether the rotor coil L2 of the rotor coil L2 is excited, that is, whether the closed coil is formed in the rotor coil L2 for a predetermined period, and has a duty corresponding to the loop formation rate. The voltage adjusting pulse is applied to the base of the transistor Q3 of the voltage adjusting unit 70.

Next, the operation process of the present invention having the above-described configuration will be described in detail.

First, the power generation control unit 80 determines the number of times the rotor coil L2 of the rotor coil unit 50 is excited during a predetermined period.

In this case, when the number of times that the rotor coil L2 is excited during a predetermined period is large, that is, when the voltage of the port of the power generation controller 80 to which one side of the rotor coil L2 is connected is low, the battery 10 In the case where the frequency of charging is high because the amount of discharge is large and the number of times that the rotor coil L2 is excited is small, that is, when the voltage of the power generation control unit 80 port connected to one side of the rotor coil L2 is at a high level. When the number of times is large, the amount of discharge of the battery 10 is small and the charging frequency is low. Therefore, the discharge amount of the battery 10, that is, the current voltage of the battery 10 can be determined by the number of times the rotor coil L2 is excited.

Next, the power generation control unit 80 has a predetermined duty to gradually charge the battery 10 when the current voltage of the battery 10 is included in a predetermined voltage range (for example, 12V to 14V) in this determination. When the voltage adjustment pulse is applied, the voltage adjustment pulse phase-inverted by the transistor inside the power generation control unit 80 is applied to the base of the transistor Q3 of the voltage adjustment unit 70.

On the other hand, the generated voltage from the stator coil unit 60 connected in parallel with the battery 10 is divided based on the first, second, and third resistors R4, R5, and R6 of the voltage adjusting unit 70, and the voltage is returned to the feedback voltage. In the low level section of the voltage adjusting pulse of the power generation control unit 80, the transistor Q3 is turned on, and thus the generated voltage is divided based on the first and second resistors R4 and R5. It is applied to the voltage comparator 40 with one feedback voltage.

At this time, when the first feedback voltage is the same as the breakdown voltage of the Zener diode ZD of the voltage comparator 40, the voltage generated from the stator coil 60 is maintained at about 14 V, which is a predetermined constant voltage. Power generation control is performed so that the generated voltage from the coil portion 60 is maintained at about 14V.

On the other hand, in the high level period of the voltage adjustment pulse of the power generation control unit 80, the transistor Q3 is turned off and divided based on the first, second and third resistors R4, R5, and R6, so that the voltage is relatively higher than the first feedback voltage. The second feedback voltage having a higher voltage corresponding to the third resistor R6 is applied to the voltage comparator 40.

Therefore, the feedback voltage divided based on the generated voltage from the stator coil unit 60 becomes higher when the reference voltage in the voltage comparator 40, that is, the breakdown voltage of the zener diode ZD is not changed. Since the feedback voltage applied to the zener diode ZD becomes relatively high, the generated voltage from the stator coil unit 60 is controlled to be lowered by the third resistor R6 to maintain about 12V.

As a result, when the voltage of the battery 10 drops and the battery is charged, the coil L2 of the rotor coil part 50 is continuously excited until the battery 10 reaches the rated voltage (for example, 14 V). In other words, only the first and second resistors R4 and R5 of the voltage adjusting unit 70 are operated to be charged so that the rotational force of the rotor coil unit 50 acts as an excessive load of the engine. Excite the rotor coil L2 of the rotor coil unit 50 intermittently until the voltage reaches the rated voltage, i.e., in the high level section of the voltage adjustment pulse of the power generation controller 80, the first and second resistors R4, R5) only, and in the low level section, the first, second and third resistors R4, R5 and R6 all act to intermittently transfer the rotational force of the rotor coil 50 to the engine so as not to act as an excessive load. Will be.

On the other hand, it will be understood by those skilled in the art that various changes and modifications can be made without departing from the spirit of the present invention.

As described above, according to the present invention, when an electric load is input in a vehicle, the engine can be prevented without additional engine compensation, and the engine's R.P.M. (RPM) rises sharply, thereby unnecessary engine R.P. There is an effect that can prevent the overshoot of M.

Claims (2)

A rotor coil portion rotating based on the operation of the engine and selectively excited according to whether a closed loop is formed to generate magnetic lines of force; A stator coil unit for rectifying and outputting an alternating voltage generated by blocking a magnetic force line of the rotor coil unit as a generated voltage; A voltage comparator configured to form a closed loop of the rotor coil part when the feedback voltage applied is smaller than a preset reference voltage, and close the closed loop when the feedback voltage is greater than the preset reference voltage; A voltage adjusting unit for selectively dividing a generated voltage from the stator coil unit based on a voltage adjusting pulse in parallel with a battery and outputting the generated voltage as the feedback voltage; And a power generation control unit configured to detect whether or not a closed loop is formed in the rotor coil unit for a predetermined period and output the voltage adjustment pulse having a duty corresponding to the closed loop formation rate. According to claim 1, wherein the voltage adjusting unit is connected to the ground voltage generated from the stator coil unit connected in parallel with the battery in series with the first, second, and third resistors, and the collector is connected between the second resistor and the third resistor. Recall a potential between the first resistor and the second resistor, including a transistor connected to the ground and selectively turned on / off based on a voltage adjustment pulse applied to the base to remove / include the third resistor value. An electric power generation control device for a vehicle, characterized by outputting a feedback voltage.