JPH06225476A - Controller of charging generator for vehicle - Google Patents

Abstract

PURPOSE:To realize the controller of a charging generator which can estimate the output current of the generator with a high accuracy without providing a current sensor for an electric load and can transfer the estimation signal to an engine control means. CONSTITUTION:The voltage of a battery 5 is compared with a reference voltage by a comparator 54 and the comparison signal is supplied to a comparator 62 and compared with the signal of an oscillator 61. The output signal of the comparator 62 is supplied to a switch 42 and a control is performed so as to have the voltage of the battery 5 constant. The output signal of the comparator 54 is also supplied to a comparator 64 and compared with the output signal of a converter 70. The output signal of the comparator 64 is converted into a digital value by a logic 68. The output signal of a comparator 46 is compared with the output signal of the converter 70 by a comparator 65. The output signal of the comparator 65 is converted into a digital value by the logic 68. The output current of a generator 100 is obtained by the logic 68 from voltage information, field current information and revolution information and the output current signal is transferred to an upper grade microcomputer 9.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device for a vehicle charging generator.

[0002]

2. Description of the Related Art As a control device for a vehicle charging generator,
For example, there is one described in JP-A-63-109058. In the control device described in this publication, the semiconductor power switch is PWM-controlled and the field winding current is controlled so that the charging voltage of the battery becomes a predetermined value. Further, Japanese Patent Publication No. 63-4409 discloses a controller for a charging generator in which the duty ratio of turning on and off the semiconductor power switch is controlled by a microcomputer so that the charging voltage of the battery becomes a predetermined value. . Further, Japanese Patent Application Laid-Open No. 2-184300 discloses a charge control device that controls a field winding current in order to prevent a sudden change in torque of an internal combustion engine when an electric load such as an air conditioner is turned on. . In other words, by suppressing the rate of increase in the field winding current when an electric load is applied,
The sudden change in torque of the internal combustion engine is prevented.

Further, Japanese Patent Laid-Open No. 63-69437 discloses a control method for a vehicle charging generator that accurately detects the charging state of a battery and maintains the charging state in an optimum state. . In this control method, first, the regulated voltage of the battery is set higher than the rated voltage, and after a lapse of a predetermined time, the output current A of the charging generator is determined by the conductivity of the switching means for the field winding current and the engine speed. (Load current + Charging current) is calculated. Next, the regulated voltage is set near the rated voltage, and the output current B (load current) of the charging generator is calculated from the conductivity of the switch means and the engine speed. Then, the output current A to the output current B
Is subtracted to calculate the charging current, and whether or not to charge the battery is determined according to the calculated charging current.

[0004]

By the way, in the above-mentioned vehicle charging generator, there is a demand for a control device capable of supplying sufficient current to an electric load without causing a sudden torque change of the internal combustion engine when the electric load is turned on. . Japanese Patent Laid-Open No. 2-18
In the control device described in Japanese Patent No. 4300, since the rate of increase of the field winding current is suppressed, it is possible to prevent a rapid torque change of the internal combustion engine, but the rising of the supply current to the electric load is prevented. It will be late.

Therefore, a load current detection sensor is provided for each electric load to determine which electric load is applied to control the drive torque of the engine (internal combustion engine).
It is conceivable that a sufficient current can be supplied to the electric load without a sudden change in torque. However, disposing the detection sensor in each of the electric loads complicates the system of the vehicle body and the host microcomputer for controlling the engine and causes a cost increase.

Further, in the control method described in Japanese Patent Laid-Open No. 63-69437, the output current of the charging generator is calculated from the conductivity of the switch means and the engine speed, and the state of the electric load is calculated from the calculated output current. It is conceivable to configure so as to detect and control the engine drive torque accordingly. However, if the output current of the charging generator is calculated only from the conductivity of the switch means and the engine speed, it is not possible to deal with the output current change due to the temperature fluctuation of the charging generator, and highly accurate control cannot be performed. There was a problem. An object of the present invention is a vehicle for which the output current of a charging generator can be calculated with high accuracy and a calculated output current value can be transferred to an engine control means without disposing a current detection sensor in each electric load. It is to realize a control device for a charging generator.

[0007]

In order to achieve the above object, the present invention is configured as follows. Charging by the armature winding of the charging generator, the field winding, the semiconductor switch means connected in series to this field winding, the output signal rectifying means of the armature winding, and the output signal of the rectifying means. Storage battery,
A storage battery voltage detecting means, and when the detected storage battery voltage is below a set voltage value, conducts the semiconductor switch means, and when the storage battery voltage is above the set voltage value, shuts off the semiconductor switch means In a control device for a vehicle charging generator, based on a field winding current detecting means, a charging generator rotation speed detecting means, a storage battery voltage value, a charging generator rotation speed, and a field winding current. And an output current calculation means for obtaining the output current of the charging generator and transferring it to the host controller.

Further, the armature winding of the charging generator, the field winding, the semiconductor switch means connected in series to the field winding, the output signal rectifying means of the armature winding, and the rectifying means. The storage battery charged by the output signal of, and the voltage detection means of the storage battery, when the detected voltage of the storage battery is less than the set voltage value, the semiconductor switch means is turned on, the voltage of the storage battery is more than the set voltage value. At the time, in the control device of the vehicle charging generator for shutting off the semiconductor switch means, the rotation speed detecting means of the charging generator, the temperature detecting means of the charging generator,
Based on the voltage value of the storage battery, the number of revolutions of the charging generator, the conduction ratio of the semiconductor switch means, and the temperature of the charging generator, the output current of the charging generator is obtained, and the output current calculating means transfers it to the host controller. , Is provided.

Preferably, in the above control device, the output current calculating means estimates the type of electric load applied from the obtained change in output current. Further, preferably, in the above control device, the field winding current detection means detects the field winding current based on the voltage value generated in the resistance element connected to the semiconductor switch means, and the charging power generation is performed. The rotation speed detection means of the machine detects the rotation speed from the voltage value of the rectification means. Further, preferably, in the above control device, the output current calculation means has a storage means for storing the output current characteristic with respect to the field winding current and the rotation speed of the generator, and the output current characteristic stored in the storage means. Based on, the output current of the charging generator is estimated.

Further, in the above control device, preferably, the output current calculating means has a D / A converter, and the detected values of the field winding current and the voltage of the storage battery are the output signals of the D / A converter. Is converted into a digital value by being compared with, and the output signal of the D / A converter is compared with a predetermined oscillation signal.
The conduction ratio of the semiconductor switch means is controlled. Further, in the above control device, preferably, the D / A converter has a weighting current source, the weighting current source of the upper bit and the weighting current source of the lower bit are connected in parallel, and bit inversion due to variation in weight is performed. Is suppressed. Further, preferably, in the control device, the output current calculation means, the current of the field winding, the detection voltage of the storage battery, the rotation speed of the charging generator,
Means for converting the temperature of the generator into digital signals, means for temporarily storing these digital signals, a timer for controlling the conduction ratio of the semiconductor switch means, a digital interface for serial communication, charging power generation And a processor that calculates the output current of the machine.

Preferably, in the control device, at least the temperature detecting means, the power source and the semiconductor switch means of the charging generator are integrated on the same substrate as an integrated circuit. Further, preferably, in the above control device,
The charging current of the storage battery is estimated from the voltage of the storage battery and the output current of the charging generator, and the time-dependent change state of the storage battery is determined by the rate of voltage rise of the storage battery or the discharge voltage when power generation is stopped, and transferred to the host controller. . Further, preferably, in the above control device, the time-dependent change state of the storage battery is displayed on the display means of the vehicle.

The armature winding of the charging generator, the field winding, the semiconductor switch means connected in series to the field winding, the output signal rectifying means of the armature winding, and the rectifying means. It has a storage battery charged by the output signal, and a storage battery voltage detection means, and when the detected storage battery voltage is less than or equal to a set voltage value, the semiconductor switch means is turned on, and the storage battery voltage is greater than or equal to the set voltage value. At the time, in the control device of the vehicle charging generator for shutting off the semiconductor switch means, the rotation speed detecting means of the charging generator, the temperature detecting means of the charging generator, and the magnetic sensor detecting the output current of the charging generator. A voltage value of the storage battery, the rotation speed of the charging generator, the temperature of the charging generator, and the output current, based on which the type of the applied electric load is determined, and a signal indicating the determined electric load, The above charging generator And an output current calculation means for transferring a signal indicative of the output current to the host controller.

[0013]

In the first aspect, the output signal from the field winding current detecting means, the output signal from the rotation speed detecting means of the charging generator, and the voltage value signal of the storage battery are supplied to the output current calculating means. To be done. The output current calculation means obtains the output current of the charging generator based on the supplied signal and transfers it to the host controller. Therefore, even if the charging generator changes in temperature, the field current itself is detected, so that the output current can be calculated with high accuracy. Then, the host controller controls the torque of the internal combustion engine and the like. In the second aspect, the output signal from the rotation speed detection means of the charging generator, the output signal from the temperature detection means of the charging generator, the voltage value signal of the storage battery, and the conduction ratio of the semiconductor switch means. And the signal are supplied to the output current calculation means. The output current calculation means obtains the output current of the charging generator based on the supplied signal and transfers it to the host controller. Therefore, even if the temperature of the charging generator changes, the output current can be corrected from the output signal from the temperature detecting means and the output current can be calculated with high accuracy. Then, the host controller controls the torque of the internal combustion engine and the like.

[0014]

1 is a block diagram of the first embodiment of the present invention. In FIG. 1, an armature winding 1, a rectifying diode 2,
The IC regulator 4 is a control device of the vehicle AC charging generator 100 including the field winding 3. The IC regulator 4 is connected to the field winding 3 via a diode 41 and supplies an output signal to the semiconductor power switch 42, the power switch drive circuit 44, and the drive circuit 44 that control the current of the field winding 3. It has a PWM comparator 62. Further, the regulator 4 includes a PWM oscillator 61 connected to the inverting input terminal of the comparator 62 and a switching switch 63 connected to the non-inverting input terminal of the comparator 62.
a, it has a voltage comparator 64 for detecting the voltage deviation value. The non-inverting input terminal of the comparator 64 is connected to the switch 63a, and the inverting input terminal is the switch 6a.
3b is connected. The non-inverting input terminal of the comparator 64 is connected to the output terminal of the voltage deviation circuit 54, and the output terminal of the voltage deviation circuit 54 is connected to the inverting input terminal via the resistor 51d and the capacitor 52a which are connected in parallel. It Further, the inverting input terminal of the comparator 54 is grounded via the resistor 51c and the capacitor 52b, and the non-inverting input terminal is grounded via the power supply 53.
Further, the midpoint of connection between the resistor 51c and the capacitor 52b is
It is grounded via the resistor 51b and connected to the battery 5 via 51a.

The shunt resistor 49 is connected to the power switch 42.
Connected between ground and ground. And power switch 4
The midpoint of connection between 2 and the resistor 49 is connected to the non-inverting input terminal of the current detection comparator 46 via the resistor 47c. The middle point of connection between the resistor 49 and the ground is the resistor 47d.
Is connected to the non-inverting input terminal of the comparator 46 via the resistor 47b, and is also connected to the inverting input terminal of the comparator 46 via the resistor 47b. Further, the inverting input terminal of the comparator 46 is connected to the comparator 4 via the resistor 47a.
6 output terminals. The output terminal of the comparator 46 is connected to the non-inverting input terminal of the current comparator 65. The inverting input terminal of this comparator 65 is
It is connected to the switch 63b and its output terminal is connected to the input terminal of the control logic 68. 67 is an oscillator, and the output signal from this oscillator 67 is supplied to the D / A converter 70 and the control logic 68.

Reference numerals 48a and 48b are rotation detecting resistors, and the diode 2 is connected to the input terminal of the control logic 68 via the resistor 48a. Also, the resistor 48
The midpoint of connection between a and the input terminal of the control logic 68 is grounded via the resistor 48b. The output terminal of the comparator 64 is also connected to the input terminal of the control logic 68. Then, from the control logic 68, the D / A converter 70 and the serial interface 6
A signal is output to 6. The output signal from the D / A converter 70 is supplied to the switches 63a and 63b.

Reference numeral 7 is a key switch (ignition switch) connected to the field winding 3. The key switch 7 includes a charge lamp 8 and a semiconductor power switch 43.
Grounded through. 45 is a power switch 43
The drive circuit 45 controls the power switch 43 in accordance with a signal from the control logic, and when the engine speed reaches the normal speed, the charge lamp 8 is turned off. Reference numeral 9 denotes an upper microcomputer (upper microcomputer), and the upper microcomputer 9 controls the engine and the like. Reference numeral 6 is an auxiliary device (electric load) such as a headlight.

The switch 63a is switched by a command signal from the control logic 68, and whether the signal input to the non-inverting input terminal of the comparator 62 is the output signal from the comparator 54 or the output signal from the D / A converter 70. Can be switched. The switch 63b is also switched by a command signal from the control logic 68, and the output signal of the D / A converter 70 is supplied to the inverting input terminal of the comparator 64 or the comparator 65.
The supply to the inverting input terminal of is switched.

Next, the operation of the IC regulator 4 will be described. Normally, the IC regulator 4 controls on / off of the passing current of the field winding 3 by the semiconductor power switch 42 so that the voltage of the battery 5 becomes constant.
The voltage of the battery 5 is detected and divided by the resistors 51a and 51b, is compared with the reference voltage value from the voltage source 53 by the comparator 54 which is a voltage deviation circuit, and the error is amplified. The error amplified by the comparator 54 is supplied to the non-inverting input terminal of the comparator 62 via the switch 63a and compared with the signal from the PWM oscillator 61.
Then, the output signal of the comparator 62 is supplied to the switch 42 via the drive circuit 44, and the switch 42 is ON / OFF controlled. Thereby, the passing current of the field winding 3 is adjusted so that the voltage of the battery 5 becomes constant.

The output signal of the comparator 54 is also supplied to the non-inverting input terminal of the comparator 64, which successively compares it with the output signal of the D / A converter 70. Then, the output signal of the comparator 64 is converted into a digital value by the control logic 68. The output signal of the current detection comparator 46 is compared with the output signal of the D / A converter 70 by the comparator 65,
The output signal of the comparator 65 is converted into a digital value by the control logic 68. Digital conversion of the output signal from the comparator 64 and the comparator 65
The digital conversion of the output signal from is performed in time division.

The control logic 68 outputs the output signal from the comparator 64, that is, the voltage information of the battery 5, the output signal from the comparator 65, that is, the field winding current information, and the charge supplied via the resistor 48a. It has a logic for obtaining the output current of the charging generator 100 from the rotation speed information of the generator 100. Further, the control logic 68 has a register for storing the voltage information, the current information, and the rotation speed information as digital values, and the digital values stored in this register can be taken out as a signal to the outside by the serial interface 66. The above information is transferred to the host microcomputer 9. The output signal of the current detection comparator 46 may be provided with a terminal and an analog value may be directly taken out to the outside.

When the electric load 6 is turned on, the control logic 68 detects the turned-on state, that is, which electric load is turned on, by the change in voltage and current.
When the load specified in advance is applied, the control logic 68 switches the switch 63a to the D / A converter 70 side, suppresses the passing current increase rate of the field winding 3, and prevents sudden torque change of the internal combustion engine. Control to do. Then, when the applied load is not the specified load, the host microcomputer 9 executes the torque adjustment of the internal combustion engine based on the transferred information. The output signal from the D / A converter 70 supplied to the comparators 64 and 65 is set to an appropriate value by the control logic 68.

FIG. 2 is an output characteristic diagram of the charging generator 100, where the vertical axis represents the output current of the charging generator 100 and the horizontal axis represents the field winding current. When the generated voltage is constant, the field current of the field winding 3 changes the output current of the generator according to the rotation speed. Control logic 68
If the characteristics of the charging generator are stored as a map in the internal memory, the output current of the charging generator 100 can be estimated from the field current, the rotation speed, and the battery voltage. When there are many electric loads, the type of electric load can be specified from the amount of output current that changes depending on the electric load and the amount of change in output current per unit of time that is peculiar to the load.

FIG. 3 is a flowchart of load estimation by the control logic 68. In FIG. 3, initialization is executed in step 102, and battery voltage, generator rotation speed, field current, etc. are detected in step 103. Next, in step 104, it is determined whether the rotation speed of the generator is equal to or higher than a predetermined value. If it is not equal to or more than the predetermined value, the routine proceeds to step 105, where the initial illustration routine is executed. That is, for example, when the rotation speed is low, such as during idling, the power generation state is maintained such that the battery 5 does not rise. Then, the process proceeds from step 105 to step 107.

If the number of revolutions is equal to or greater than the predetermined value at step 104, the routine proceeds to step 106, where the voltage control routine, that is, the voltage value of the battery 5 becomes constant,
The charging generator 100 is controlled. And step 10
The process proceeds to step 7 to determine whether load estimation is necessary (whether or not this load estimation is necessary can be arbitrarily selected in advance). If load estimation is not necessary, the routine proceeds to step 111, where the torque control routine is executed. That is, for example, a torque control routine is executed to suppress the increase rate of the field current to prevent a rapid torque change of the internal combustion engine, and the process returns to step 103.

If load estimation is required at step 107, the routine proceeds to step 108, where a load current estimation routine is executed. Next, in step 109, an electric load specifying routine is executed, and in step 110, the ID code indicating what the electric load is, the load current value, etc. are transferred to the host microcomputer 9. Next, step 111
After executing the torque control routine, the process returns to step 103.

FIG. 4 shows the D / A converter 7 in the example of FIG.
2 is a circuit diagram of an example of 0. FIG. The example of FIG. 4 is a D / A converter that adds weighted currents, and the constant current source 71 and the switch are configured by CMOS so as to be small when integrated. When the torque control is performed by the IC regulator 4, it is important to secure the monotonic increase property. In the example of FIG. 4, the upper bits and the lower bits are arranged in parallel, and the switches are operated by the decoder 73. The details of the circuit operation will be described. For example, resistors 75a, 75b, 75c
A constant voltage of V1 and V2 is generated by the partial voltage of. It is desirable that this is stable and the variation direction is constant,
A bandgap voltage of a transistor or an amplified version thereof may be used. The output of the D / A converter 70 is an output obtained by decomposing the difference between the voltages V1 and V2 by the digital bit number. This is the difference between voltages V1 and V2
a, the transistor 76b is level-shifted, and the constant current in which this voltage difference is limited by the resistor 78 is applied to the PMOS transistor 7
The current flowing into the circuit 10 and weighted by the constant current source circuit 71 according to the number of bits is converted into a voltage by the resistor 79 via the switch 721 and the like. At this time, the switches 721 and the like reduce the output fluctuation of the D / A converter 70 due to the current fluctuation by causing the current to flow through the transistor 76c even when the current does not flow through the resistor 79. Further, when the constant current source circuit 71 is integrated into an IC, it is laid out in a cross pattern to reduce current variations. How many bits are represented by the lower bits is determined by the variation of the constant current source circuit 71 and the circuit scale. In the example of FIG. 4, the yield is improved because it is less affected by the variation of the elements and is easily integrated as an IC.

As described above, according to the first embodiment of the present invention, the charging is performed based on the voltage value of the battery 5, the rotation speed of the charging generator 100, and the field winding current. It is configured to calculate the output current of the electric load and the charging generator. Therefore, the output current of the charging generator is calculated with high accuracy without arranging a current detection sensor for each electric load and without being affected by temperature changes, and the calculated output current value is used as the engine control means. A transferable control device for a vehicle charging generator can be realized.

FIG. 5 is a block diagram of the second embodiment of the present invention. The example of FIG. 5 is the same as the example of FIG. 1, but includes the comparators 54, 62, 64 and 65, the drive circuits 44 and 45, the switches 63a and 63b, the control logic 68, and the D / A.
This is an example in which the converter 70, the oscillators 61 and 67, the serial interface 66, and the like are configured by the digital arithmetic means 80. The digital calculation means 80 includes, for example, a CPU 81 which is a processor, a RAM 82, a ROM 83, and a PWM timer 8.
4, an A / D converter 85, an OSC (oscillator) 86, a serial I / F (interface) 87, and I / O (input / output units) 88a and 88b. The voltage of the battery 5 is divided by the resistors 51a and 51b and taken into the A / D converter 85 from the I / O 88a. The current flowing through the semiconductor power switch 42, that is, the field winding current, is
The voltage is converted by the detection resistor 49, and the comparator 46, I
It is taken into the A / D converter 85 via / O88b.
In addition, the rotation speed of the charging power generator 100 is the resistance 48a, 48
b, the temperature is detected by the temperature sensor 91, and the I / O 88b
Is taken into the A / D converter 85 via. By using values obtained by digitizing these detected values, the duty ratio of the PWM pulse supplied to the semiconductor power switch 42 is calculated by the digital calculation means 80 so that the voltage of the battery 5 and the current flowing through the semiconductor power switch 42 are optimized. Calculated. .

On the ROM 83 of the digital calculation means 80, the output current increasing characteristic of the generator shown in FIG. 2 is stored as a map. From this map, the output current of the generator can be estimated from the field current and the rotation speed, as in the example of FIG. When there are many electric loads, the type of electric load can be specified from the amount of output current that changes depending on the electric load and the amount of change in output current per unit of time that is specific to the load. The operation flow of the digital arithmetic means 80 is the same as that shown in FIG.

If the temperature condition is constant, the output current can be estimated from the unique relationship between the PWM duty ratio and the field current without detecting the field current. That is, the rotation speed of the charging generator, the flow rate (conduction rate) of the switch 42,
The output current can be estimated from the temperature of the charging generator. In this case, the current detector (comparator 46, resistor 49, etc.) can be omitted, and the circuit can be simplified.

In the example shown in FIG. 5, in addition to the effect obtained by the example in FIG. 1, it is possible to easily cope with it by changing the stored contents of the ROM 83 according to the output characteristics of each charging generator. There is an effect. Also, the rotation speed of the charging generator and the conduction ratio (conduction ratio) of the switch 42.
If the output current is estimated from the charge generator temperature, the current detector composed of the comparator 46, the resistor 49 and the like can be omitted, the configuration of the control device 4 can be simplified, and no adjustment is required for mounting. It has the effect of making it easier.

FIG. 6 is a block diagram of the third embodiment of the present invention. In the example of FIG. 6, the field current detector is omitted. Then, the output current of the charging generator 100 is detected by the magnetic sensor 21 and is supplied to the digital arithmetic unit 80 via the amplifier 983. In this case, the output current of the amplifier 93 may be directly output to the outside of the host microcomputer 9 or the like.
In the example of FIG. 6, the content calculated by the digital calculation means 80 may be the discrimination and estimation of the electric load, and the processing in the digital calculation means 80 can be reduced. Therefore, in the example of FIG. 6, in addition to the effects obtained in the example of FIG.
The current detector can be omitted, the configuration can be simplified, and the digital operation means 80 can be made relatively inexpensive with a relatively small processing capacity.

FIG. 7 is a block diagram of the fourth embodiment of the present invention. The example of FIG. 7 is an example in which the parts other than the digital operation means 80 of the IC regulator 4 are integrated as a power IC 90. The power IC 90 is an integrated circuit in which at least the semiconductor power switches 42 and 43, the temperature sensor 91, and the power source 92 are configured on the same substrate. Then, the armature winding current is supplied to the digital calculation means 80 via the filter 22. Further, the voltage signal of the battery 5 is also supplied to the digital calculation means 80 via the filter 22.

If necessary, a flywheel diode 41, a current detecting comparator 46, a filter 2
2, the detection resistor 23 and the like may be arranged outside the power IC 90 for adjustment. By reducing the number of external parts, the system configuration is facilitated in mounting as a hybrid IC and packaging mounting. In the example of FIG. 7, in addition to the effects obtained by the example of FIG. 1, it is possible to realize a charge control device particularly suitable for downsizing.

In each of the embodiments described above, the battery 5 is calculated from the voltage of the battery 5 and the estimated output current of the charging generator.
The charging current of the battery is estimated, and the time-dependent change state of the battery is determined based on the rate of increase of the voltage of the battery 5 or the discharge voltage when the power generation is stopped and transferred to the outside. It can also be configured to do so. According to this structure, it is possible to clarify the time to replace the battery, and it is possible to prevent engine stalling due to battery exhaustion.

[0037]

Since the present invention is constructed as described above, it has the following effects. In a control device for a vehicle charging generator, based on a field winding current detecting means, a charging generator rotation speed detecting means, a storage battery voltage value, a charging generator rotation speed, and a field winding current. And an output current calculation means for obtaining the output current of the charging generator and transferring it to the host controller. Therefore, it is possible to calculate the output current of the charging generator with high accuracy without being affected by temperature changes and to transfer the calculated output current value to the engine control means without disposing a current detection sensor in each electric load. It is possible to realize a control device for a vehicle charging generator.

Further, in the control device for the vehicle charging generator, the rotating speed detecting means of the charging generator, the temperature detecting means of the charging generator, the voltage value of the storage battery, the rotating speed of the charging generator, and the semiconductor switch means. Based on the flow rate and the temperature of the charging generator, the output current of the charging generator is obtained, and the output current calculating means for transferring the output current to the higher-level control device may be provided. Vehicle charging that can calculate the output current of the charging generator with high accuracy without being affected by temperature changes and transfer the calculated output current value to the engine control means without disposing a current detection sensor for each load A generator control device can be realized.

Further, in the control device for the vehicle charging generator, the rotation speed detecting means of the charging generator, the temperature detecting means of the charging generator, the magnetic sensor for detecting the output current of the charging generator, and the voltage of the storage battery. Based on the value, the rotation speed of the charging generator, the temperature of the charging generator, and the output current, the type of the applied electric load is determined, and a signal indicating the determined electric load, and the charging generator The output current calculating means for transferring the signal indicating the output current of the output current to the host control device, and, as described above, without changing the current detection sensor for each electric load, to the temperature change Calculate the output current of the charging generator with high accuracy without being affected,
It is possible to realize the control device for the vehicle charging generator that can transfer the calculated output current value to the engine control means.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a control device for a vehicle charging generator that is a first embodiment of the present invention.

FIG. 2 is a graph showing output current characteristics of the charging generator.

FIG. 3 is an operation flowchart of the example of FIG.

4 is a circuit diagram of an example of a D / A converter in the example of FIG.

FIG. 5 is a configuration diagram of a control device for a vehicle charging generator that is a second embodiment of the present invention.

FIG. 6 is a configuration diagram of a control device for a vehicle charging generator that is a third embodiment of the present invention.

FIG. 7 is a configuration diagram of a control device for a vehicle charging generator that is a fourth embodiment of the present invention.

[Explanation of symbols]

 1 Armature Winding 2 Rectifier Diode 3 Field Winding 4 IC Regulator 5 Battery 6 Electric Load 7 Key Switch 8 Charge Lamp 9 Upper Microcomputer 21 Magnetic Sensor 22 Filter 42, 43 Semiconductor Power Switch 44, 45 Drive Circuit 46, 54 Comparator 62, 64 Comparator 65 Comparator 48a, 48b Rotation detecting resistor 49 Shunt resistor 51a, 51b Voltage detecting resistor 63a, 63b Switch 66 Serial interface 68 Control logic 70 D / A converter 80 Digital operation means 91 Temperature sensor 100 Charge generator

Front page continued (72) Inventor Yuji Maeda 2520 Takaba, Katsuta City, Ibaraki Prefecture Hitachi Automotive Systems Division

Claims (12)

[Claims] 1. An armature winding of a charging generator, a field winding for supplying magnetic flux to the armature winding, semiconductor switch means connected in series to the field winding, and the armature. It has a rectifying means for rectifying the output signal of the winding, a storage battery charged by the output signal of the rectifying means, and a means for detecting the voltage of the storage battery, and the detected voltage of the storage battery is a preset voltage value. In the control device of the vehicle charging generator, which conducts the semiconductor switch means at the following times and shuts off the semiconductor switch means when the voltage of the storage battery is equal to or higher than the set voltage value, the current flows to the field winding. A means for detecting a current, a means for detecting the rotation speed of the charging generator, a voltage value of the storage battery, a rotation speed of the charging generator, and a field winding current, based on the charging power generation Calculate the output current of the machine A control device for a vehicle charging generator, comprising: an output current calculation unit that transfers the output current to the control device. 2. An armature winding of a charging generator, a field winding for supplying magnetic flux to the armature winding, semiconductor switch means connected in series to the field winding, and the armature. It has a rectifying means for rectifying the output signal of the winding, a storage battery charged by the output signal of the rectifying means, and a means for detecting the voltage of the storage battery, and the detected voltage of the storage battery is a preset voltage value. In the control device of the vehicle charging generator, which conducts the semiconductor switching means at the following times and shuts off the semiconductor switching means when the voltage of the storage battery is equal to or higher than a set voltage value, the rotation speed of the charging generator. Means for detecting the temperature of the charging generator, the voltage value of the storage battery, the rotation speed of the charging generator, the conduction ratio of the semiconductor switch means, the temperature of the charging generator And, based on , Obtain the output current of the charging generator,
A control device for a charging generator for a vehicle, comprising: an output current calculation unit that transfers the output current to a host control device. 3. The control device for the vehicle charging generator according to claim 1 or 2, wherein the output current calculation means is:
A control device for a charging generator, which estimates the type of an electric load that is input from the obtained change in output current. 4. The control device for a vehicle charging generator according to claim 1, wherein the current detection means of the field winding is based on a voltage value generated in a resistance element connected to the semiconductor switch means. A control device for a vehicle charging generator, wherein the rotation speed detecting means of the charging generator detects the current of the field winding and detects the rotation speed from the voltage value of the rectifying means. 5. The control device for a vehicle charging generator according to claim 1 or 2, wherein the output current calculating means is
Estimating the output current of the charging generator based on the output current characteristics stored in the storage means, the storage means storing the output current characteristics with respect to the field winding current and rotation speed of the generator. A control device for a vehicle charging generator, characterized by: 6. An armature winding of a charging generator, a field winding for supplying magnetic flux to the armature winding, semiconductor switch means connected in series to the field winding, and the armature. It has a rectifying means for rectifying the output signal of the winding, a storage battery charged by the output signal of the rectifying means, and a means for detecting the voltage of the storage battery, and the detected voltage of the storage battery is a preset voltage value. In the control device of the vehicle charging generator, which conducts the semiconductor switching means at the following times and shuts off the semiconductor switching means when the voltage of the storage battery is equal to or higher than a set voltage value, the rotation speed of the charging generator. Means for detecting the temperature of the charging generator, a magnetic sensor for detecting the output current of the charging generator, the voltage value of the storage battery, the rotation speed of the charging generator, the charging Generator temperature An output that transfers the signal indicating the determined electric load and the signal indicating the output current of the charging generator to the host control device, while determining the type of the applied electric load based on the output current. A controller for a vehicle charging generator, comprising: a current calculating unit. 7. The control device for a vehicle charging generator according to claim 1, wherein the output current calculating means includes a D / A converter, and the detected values of the field winding current and the voltage of the storage battery. Is converted into a digital value by being compared with the output signal of the D / A converter, the output signal of the D / A converter is compared with a predetermined oscillation signal, and the signal obtained by this comparison result. The control device for a vehicle charging generator is characterized in that the conduction ratio of the semiconductor switch means is controlled by the above. 8. The control device for a vehicle charging generator according to claim 7, wherein the D / A converter has a weighted current source, and the upper bit weighted current source and the lower bit weighted current source are A control device for a vehicle charging generator, which is connected in parallel and suppresses bit inversion due to variation in weight. 9. The control device for a vehicle charging generator according to claim 2, wherein the output current calculating means includes a current of the field winding, a detection voltage of the storage battery, a rotation speed of the charging generator, and Means for converting the temperature of the generator into digital signals, means for temporarily storing these digital signals,
A timer for controlling the conduction ratio of the semiconductor switch means,
A control device for a vehicle charging generator, comprising a digital interface for serial communication and a processor for calculating an output current of the charging generator. 10. The control device for a vehicle charging generator according to claim 9, wherein at least the temperature detecting means, the power source and the semiconductor switch means of the charging generator are integrated on the same substrate as an integrated circuit. A control device for a vehicle charging generator, characterized by: 11. The control device for a vehicle charging generator according to claim 1 or 2, wherein the charging current of the storage battery is estimated from the voltage of the storage battery and the output current of the charging generator, and the voltage of the storage battery is estimated. A control device for a charging generator for a vehicle, characterized in that a time-dependent change state of the storage battery is determined based on a rate of increase or a discharge voltage when power generation is stopped and is transferred to a host control device. 12. The control device for a vehicle charging generator according to claim 11, wherein the time-dependent change state of the storage battery is displayed on a display means of the vehicle.