JP2009240069A - Controller for alternator - Google Patents

Abstract

In an alternator control device, a driving force of a vehicle can be controlled by an alternator, and control with high accuracy can be performed by suppressing a control delay.
A power generation control unit that can control a power generation amount in an alternator according to a running state of a vehicle, a power generation stop detection unit that detects a power generation stop of the alternator, and a control request to the alternator are issued in advance. When the control request detection unit 105 to detect and the power generation stop detection unit 102 are in a state where the power generation stop of the alternator 11 is detected, and when the control request detection unit 105 detects a control request to the alternator 11, the power generation control unit 101 And a power generation start timing setting unit 103 that sets the power generation start timing of the alternator 11 in consideration of the power generation start delay time of the alternator 11.
[Selection] Figure 2

Description

  The present invention relates to an alternator control device capable of controlling the stop and start of power generation in an alternator according to the running state of a vehicle.

  An alternator mounted on a vehicle is driven by an engine, and rotation is transmitted from a crankshaft pulley to an alternator pulley via a drive belt. That is, the alternator generates electric power with the engine torque generated by the engine. Therefore, the battery is charged when the alternator generates power, and charging control for charging the battery is performed by the alternator control device controlling the alternator.

  On the other hand, when the alternator generates power, it becomes a load when the engine is driven. Therefore, it is considered that the engine torque is controlled by a load generated by the power generation of the alternator.

  For example, in the engine control system of Patent Document 1 below, when the engine torque is reduced, the load applied to the output shaft of the engine by the generated power generation load is controlled by increasing the energization amount of the excitation coil mounted on the alternator. Increases and engine torque decreases.

JP 2007-009885 A

  In the conventional engine control system described above, the alternator is stopped and driven repeatedly in order to control the engine torque. In this case, a rise delay time occurs when driving for power generation is started from a state where the alternator is stopped.

  In other words, the alternator normally allows an initial excitation current to flow from the battery only during power generation, but after the power generation starts, causes the excitation current to flow due to its own power generation. In the alternator, if there is a certain power generation request, the exciting current continues to flow by the action of the coil even if the switching of the control circuit is OFF. However, if a state in which there is no power generation request for the alternator continues, the excitation current becomes equal to or less than a predetermined threshold value, and the excitation current flows from the battery, as in the start of power generation, and a state in which no power generation occurs. When this generated current rises, that is, when the load torque of the alternator rises, dead time occurs. This dead time continues until the power generation voltage of the alternator exceeds the battery voltage and the current continues to flow, and a rise delay time occurs here.

  The present invention solves such a problem, and provides an alternator control device that enables control of the driving force of a vehicle by an alternator and enables high-precision control by suppressing a control delay. For the purpose.

  In order to solve the above-described problems and achieve the object, an alternator control device according to the present invention includes a power generation control unit capable of controlling a power generation amount in an alternator according to a running state of a vehicle, and a power generation stop to the alternator. A power generation stop detection means for detecting a command; a control request detection means for detecting a control request to the alternator in advance; and after the power generation stop detection means detects a power generation stop command to the alternator, the control request detection means Power generation start timing setting means for setting the power generation start timing of the alternator by the power generation control means in consideration of the power generation start delay time of the alternator when detecting a control request to the alternator. It is what.

  In the alternator control device of the present invention, provided is a power generation start delay time detecting means for detecting a power generation start delay time according to the operating state of the alternator, the power generation start timing setting means, when the power generation start delay time occurs, The power generation start timing according to the control request to the alternator is set earlier by the power generation start delay time.

  In the alternator control device according to the present invention, an excitation current value estimation detection means for estimating or detecting an excitation current value in the alternator is provided, and the power generation start delay time detection means is estimated or detected by the excitation current value estimation detection means. The power generation start delay time of the alternator is calculated based on the exciting current value.

  In the alternator control device of the present invention, a power generation voltage value detection means for detecting a power generation voltage value in the alternator is provided, and the power generation start delay time detection means is based on the power generation voltage value detected by the power generation voltage value detection means. The power generation start delay time of the alternator is calculated.

  The alternator control device of the present invention is characterized in that a time when the exciting current value or the generated voltage value is equal to or less than a predetermined value set in advance is set as a power generation start delay time.

  According to the alternator control device of the present invention, when a control request to the alternator is detected after detecting a power generation stop command to the alternator, the power generation start timing of the alternator is set in consideration of the power generation start delay time of the alternator. is doing. Therefore, the alternator can control the driving force of the vehicle, and can suppress the power generation start delay of the alternator, thereby enabling highly accurate control.

  Embodiments of an alternator control apparatus according to the present invention will be described below in detail with reference to the drawings. In addition, this invention is not limited by this Example.

  FIG. 1 is a schematic configuration diagram illustrating an alternator control apparatus according to a first embodiment of the present invention, and FIG. 2 is a control block diagram of an alternator control unit according to the first embodiment. FIG. 3 is a flowchart showing the operation control of the alternator control apparatus according to the first embodiment, and FIG. 4 is a graph showing a change in the zero-time current value from the stop of power generation to the start of power generation of the alternator.

  In the alternator control device of this embodiment, as shown in FIG. 1, the alternator 11 has a rotor coil 12, a stator coil 13, and a diode rectifier 14. Accordingly, when an exciting current flows through the rotor coil 12, power is generated by the surrounding stator coil 13, and the three-phase alternating current output from the stator coil 13 is converted into direct current by the diode rectifier 14 and output. The diode rectifier 14 is connected to the battery 15.

  The alternator 11 includes a voltage regulator 16 that controls the excitation current of the rotor coil 12. The voltage regulator 16 has an alternator control unit 17. The alternator controller 17 is connected to the base terminal of the first transistor 18. The first transistor 18 is connected to the output side of the stator coil 13 after the collector terminal is connected to the rotor coil 12. The terminal is grounded and connected to the input side of the stator coil 13. Accordingly, the alternator control unit 17 controls the excitation current of the rotor coil 12 to control the output voltage of the alternator 11 by controlling the first transistor 18 to be turned on / off.

  The alternator control unit 17 is connected to a battery 15 and an ignition key (IG) switch 19. The second transistor 20 has a base terminal connected to the alternator control unit 17, a collector terminal connected to the battery 15 via the IG switch 19, and an emitter terminal grounded.

  Further, the load device 21 such as an auxiliary machine is connected to the alternator control unit 17 via the changeover switch 22 and the IG switch 19.

  In the alternator control apparatus according to the first embodiment configured as described above, the alternator 11 can be controlled from an external electronic control unit (ECU) 31, and the power generation amount in the alternator 11 is controlled according to the traveling state of the vehicle. It is possible. Therefore, the ECU 31 is connected to the alternator control unit 17 of the voltage regulator 16. Further, a wheel speed sensor 32 is connected to the ECU 31.

  That is, in the alternator control apparatus according to the first embodiment, as shown in FIG. 2, the alternator control unit 17 includes a power generation control unit 101 capable of controlling the power generation amount in the alternator 11 and the vehicle running state input from the ECU 31. A power generation stop timing setting unit 102 that sets the power generation stop timing of the alternator 11 in accordance with the power generation start timing setting unit 103 that sets the power generation start timing of the alternator 11 in accordance with the running state of the vehicle input from the ECU 31. is doing. The alternator control unit 17 includes a power generation stop detection unit 104 that detects a power generation stop command to the alternator 11 and a control request detection unit 105 that detects a control request to the alternator 11 in advance, and sets a power generation start timing. The unit 103 starts the power generation of the alternator 11 by the power generation control unit 101 when the control request detection unit 105 detects a control request to the alternator 11 after the power generation stop detection unit 104 detects the power generation stop command to the alternator 11. The timing is set in consideration of the power generation start delay time of the alternator 11.

  Specifically, the alternator control unit 17 includes a power generation start delay time detection unit 106 that detects a power generation start delay time according to the operating state of the alternator 11, and the power generation start timing setting unit 103 generates a power generation start delay time. Then, the power generation start timing by the control request to the alternator 11 is set earlier by the power generation start delay time.

  In this case, the power generation start delay time detection unit 106 includes an excitation current value estimation unit that estimates the excitation current value in the alternator 11, and the power generation start delay time detection unit 106 includes the excitation current value estimated by the excitation current value estimation unit. Based on this, the power generation start delay time of the alternator 11 is calculated. Actually, the time when the exciting current value is equal to or less than a predetermined value set in advance is set as the power generation start delay time.

  Here, the operation control in the alternator control apparatus of Embodiment 1 will be described in detail based on the flowchart of FIG.

  In the operation control in the alternator control apparatus according to the first embodiment, as shown in FIG. 3, in step S <b> 11, the alternator control unit 17 determines whether there is a control request from the ECU 31. In this case, the control request from the ECU 31 is a signal for the ECU 31 to start power generation of the stopped alternator 11 in order to reduce the driving force of the vehicle. In this embodiment, the wheel speed sensor 32 detects the wheel speed of the front wheel and outputs the detected wheel speed to the ECU 31. The ECU 31 performs the behavior of the vehicle based on the wheel speed of the front wheel, for example, road surface unevenness and road friction coefficient. Etc., and the driving force is controlled so that the vehicle can travel stably without shock. At this time, the ECU 31 performs control so as to reduce the driving force of the vehicle by starting the power generation of the alternator 11.

  That is, the ECU 31 can predict whether or not it is necessary to reduce the driving force of the vehicle based on the detection result of the wheel speed sensor 32 and output it as a control request signal. The parameter for predicting whether or not it is necessary to reduce the driving force of the vehicle is not limited to the front wheel speed signal, but may be a vehicle speed signal, a transmission lockup release signal, or the like.

If it is determined in step S11 that there is no control request, this routine is exited without doing anything. On the other hand, if it is determined in step S11 that there is a control request from the ECU 31, it is determined in step S12 whether the alternator 11 has output a power generation stop (OFF) command. If it is determined that the alternator 11 has not output a stop command, the count t is reset in step S18. On the other hand, if it is determined that the alternator 11 has output a stop command, the excitation current If ₀ of the alternator 11 is estimated in step S13. In this case, the alternator control unit 17 estimates the initial value of the excitation current when the power generation is stopped from the integral value of the power generation time before the power generation is stopped, and sets it as the excitation current If ₀ .

When the excitation current If ₀ of the alternator 11 is estimated in step S13, the excitation current is set to a predetermined value K ₁ set in advance based on the excitation current If ₀ and the decay time constant τ in step S14. The decay time t0 _-est until the following is calculated. In step S15, the count T is started. In this case, the predetermined value K _1, the exciting current of the alternator 11 reaches the predetermined value K _1, is a value delay occurs at the start of power generation.

In step S16, it is determined whether or not the elapsed time t has exceeded the calculated decay time t0 _-est . Here, when the elapsed time t is determined to have exceeded the decay time _{t 0-est,} power generation start time by at step S17, it subtracts the maximum delay time _{t Deray-max} which is preset by the control demand time _{t 0} to calculate the t _s, to start a micro-power generation of the alternator 11. Here, the maximum delay time t _delay-max is the time from when the exciting current of the alternator 11 becomes 0 to when the exciting current flows from the battery 15 to the alternator 11 and the generated voltage of the alternator 11 exceeds the battery voltage. It is. Therefore, the power generation start time _{t s,} the control demand time _{t 0} from By earlier by the maximum delay time _{t Deray-max,} the power generation start of the alternator 11 is accelerated, it can be eliminated delay in power generation start time _{t s.}

The operation control in the above-described alternator control device will be described in time series. As shown in FIG. 4, when a power generation stop command for the alternator 11 is output at time t = 0, the excitation current If ₀ gradually decreases. To go. Then, the elapsed time t exceeds the decay time _{t 0-est,} the exciting current becomes a predetermined value _{K 1} or less. Thereafter, when the control request time _{t 0} as a control request to the alternator control unit 17 from the ECU31 is input, it sets the maximum delay time _{t Deray-max} earlier time control demand time _{t 0} as power generation start time _{t s.}

  As described above, in the alternator control device according to the first embodiment, the power generation control unit 101 that can control the power generation amount in the alternator 11 according to the traveling state of the vehicle, and the power generation stop that detects the power generation stop command to the alternator 11. After the detection unit 104, the control request detection unit 105 that detects a control request to the alternator 11 in advance, and the power generation stop detection unit 102 detects a power generation stop command to the alternator 11, the control request detection unit 105 supplies the alternator 11. When the control request is detected, a power generation start timing setting unit 103 that sets the power generation start timing of the alternator 11 by the power generation control unit 101 in consideration of the power generation start delay time of the alternator 11 is provided.

  Therefore, when there is a control request to the alternator 11 after the power generation stop command is output to the alternator 11, the power generation start timing of the alternator 11 is set in consideration of the power generation start delay time of the alternator 11. 11 is that power generation is started earlier than the actual control start time, and it is possible to control the driving force of the vehicle by the alternator 11 and to suppress the power generation start delay of the alternator 11 and to perform high-precision control. It can be.

  In the alternator control apparatus according to the first embodiment, the power generation start delay time detection unit 106 that detects the power generation start delay time according to the operation state of the alternator 11 is provided, and the power generation start timing setting unit 103 includes the power generation start delay time. When it occurs, the power generation start timing by the control request to the alternator 11 is set earlier by the power generation start delay time. Therefore, the power generation start delay time of the alternator 11 is grasped in advance, and when the power generation of the alternator 11 is started, the alternator 11 appropriately controls the driving force of the vehicle by executing the power generation start delay time earlier. be able to.

  In the alternator control apparatus according to the first embodiment, the power generation start delay time detection unit 106 is provided with an excitation current value estimation detection unit that estimates the excitation current value in the alternator 11, and the power generation start delay time detection unit 106 includes the excitation current. The power generation start delay time of the alternator 11 is calculated based on the excitation current value estimated by the value estimation detection unit. Therefore, by calculating the power generation start delay time of the alternator 11 based on the excitation current value that decreases from the power generation stop command to the alternator 11, the power generation start delay time can be accurately estimated.

  FIG. 5 is a schematic configuration diagram illustrating an alternator control apparatus according to Embodiment 2 of the present invention, and FIG. 6 is a flowchart illustrating operation control of the alternator control apparatus according to Embodiment 2. The control block in the alternator control device of the present embodiment is substantially the same as that of the first embodiment described above, and will be described with reference to FIG. 2 and a member having the same function as that described in this embodiment. Are denoted by the same reference numerals and redundant description is omitted.

  In the alternator control apparatus according to the second embodiment, as shown in FIGS. 2 and 5, the alternator control unit 17 includes a power generation control unit 101, a power generation stop timing setting unit 102, and a power generation start timing setting unit 103. ing. The alternator control unit 17 includes a power generation stop detection unit 104 and a control request detection unit 105. The power generation start timing setting unit 103 detects that the power generation stop detection unit 104 detects a power generation stop command to the alternator 11. When the control request detection unit 105 detects a control request to the alternator 11, the power generation start timing of the alternator 11 by the power generation control unit 101 is set in consideration of the power generation start delay time of the alternator 11.

  Specifically, the alternator control unit 17 includes a power generation start delay time detection unit 106 that detects a power generation start delay time according to the operating state of the alternator 11, and the power generation start timing setting unit 103 generates a power generation start delay time. Then, the power generation start timing by the control request to the alternator 11 is set earlier by the power generation start delay time.

  In this case, the power generation start delay time detection unit 106 includes an excitation current detection sensor (excitation current value estimation detection means) 41 that detects the excitation current value in the alternator 11, and the power generation start delay time detection unit 106 detects the excitation current detection. The power generation start delay time of the alternator 11 is calculated based on the excitation current value detected by the sensor 41.

  Here, the operation control in the alternator control apparatus of Embodiment 2 will be described in detail based on the flowchart of FIG.

  In the operation control in the alternator control apparatus according to the second embodiment, as shown in FIG. 6, in step S <b> 21, the alternator control unit 17 determines whether there is a control request from the ECU 31. If it is determined that there is no control request, the routine is terminated without doing anything. On the other hand, if it is determined in step S21 that there is a control request from the ECU 31, it is determined in step S22 whether the alternator 11 has output a power generation stop (OFF) command. Here, if it is determined that the alternator 11 has not output a stop command, this routine is exited without doing anything. On the other hand, if it is determined that the alternator 11 has output a stop command, the alternator control unit 17 reads the excitation current If of the alternator 11 detected by the excitation current detection sensor 41 in step S23.

When the excitation current If of the alternator 11 is read in step S23, the voltage Valt of the alternator 11 is calculated based on the excitation current If in step S24. In step S25, it is determined whether or not the voltage Valt of the alternator 11 is lower than the voltage Vbatt of the battery 15. Here, if it is determined that the alternator voltage Valt is not lower than the battery voltage Vbatt, this routine is exited without doing anything. On the other hand, if it is determined that the alternator voltage Valt is lower than the battery voltage Vbatt, the control delay time t _delay is calculated based on the excitation current If of the alternator 11 in step S26. Then, at step S27, it calculates a power generation start time _{t s} from the control demand time _{t 0} by subtracting the response delay time _{t Deray,} starts the minute power generation by the alternator 11. Therefore, the power generation start time _{t s,} the control request time by quickly from _{t 0} only the control delay time _{t Deray,} starting power generation of the alternator 11 is accelerated, can be eliminated delay in power generation start time _{t s.}

  As described above, in the alternator control apparatus according to the second embodiment, the excitation current detection sensor 41 that detects the excitation current value in the alternator 11 is provided, and the power generation start delay time detection unit 106 is detected by the excitation current detection sensor 41. Based on the excitation current value, the power generation start delay time of the alternator 11 is calculated, and the power generation start timing setting unit 103 detects a power generation stop command to the alternator 11 and then detects a control request to the alternator 11. The power generation start timing of the alternator 11 by the control unit 101 is set based on the power generation start delay time.

  Therefore, when there is a control request to the alternator 11 after the power generation stop command is output to the alternator 11, the power generation start timing of the alternator 11 is set in consideration of the power generation start delay time of the alternator 11. 11 is that power generation is started earlier than the actual control start time, and it is possible to control the driving force of the vehicle by the alternator 11 and to suppress the power generation start delay of the alternator 11 and to perform high-precision control. It can be. At this time, by calculating the power generation start delay time of the alternator 11 based on the excitation current value detected by the excitation current detection sensor 41, the power generation start timing of the alternator 11 can be set with high accuracy.

  FIG. 7 is a schematic configuration diagram illustrating an alternator control device according to a third embodiment of the present invention, and FIG. 8 is a flowchart illustrating operation control of the alternator control device according to the third embodiment. The control block in the alternator control device of the present embodiment is substantially the same as that of the first embodiment described above, and will be described with reference to FIG. 2 and a member having the same function as that described in this embodiment. Are denoted by the same reference numerals and redundant description is omitted.

  In the alternator control apparatus according to the third embodiment, as shown in FIGS. 2 and 7, the alternator control unit 17 includes a power generation control unit 101, a power generation stop timing setting unit 102, and a power generation start timing setting unit 103. ing. The alternator control unit 17 includes a power generation stop detection unit 104 and a control request detection unit 105. The power generation start timing setting unit 103 detects that the power generation stop detection unit 104 detects a power generation stop command to the alternator 11. When the control request detection unit 105 detects a control request to the alternator 11, the power generation start timing of the alternator 11 by the power generation control unit 101 is set in consideration of the power generation start delay time of the alternator 11.

  Specifically, the alternator control unit 17 includes a power generation start delay time detection unit 106 that detects a power generation start delay time according to the operating state of the alternator 11, and the power generation start timing setting unit 103 generates a power generation start delay time. Then, the power generation start timing by the control request to the alternator 11 is set earlier by the power generation start delay time.

  In this case, the power generation start delay time detection unit 106 includes a power generation voltage detection sensor (power generation voltage value detection means) 51 that detects a power generation voltage value in the alternator 11, and the power generation start delay time detection unit 106 includes the power generation voltage detection sensor 106. The power generation start delay time of the alternator 11 is calculated based on the power generation voltage value detected by 51. Actually, the power generation start delay time is a time when the power generation voltage is equal to or less than a predetermined value set in advance.

  Here, the operation control in the alternator control apparatus according to the third embodiment will be described in detail based on the flowchart of FIG.

  In the operation control in the alternator control apparatus according to the third embodiment, as shown in FIG. 8, in step S31, the alternator control unit 17 determines whether there is a control request from the ECU 31. If it is determined that there is no control request, the routine is terminated without doing anything. On the other hand, if it is determined in step S31 that there is a control request from the ECU 31, it is determined in step S32 whether the alternator 11 has output a power generation stop (OFF) command. Here, if it is determined that the alternator 11 has not output a stop command, this routine is exited without doing anything. On the other hand, if it is determined that the alternator 11 has output a stop command, the alternator control unit 17 reads the generated voltage Valt of the alternator 11 detected by the generated voltage detection sensor 51 in step S33.

When the generated voltage Valt of the alternator 11 is read in step S33, it is determined whether or not the generated voltage Valt is lower than the voltage Vbatt of the battery 15 in step S34. Here, if it is determined that the alternator voltage Valt is not lower than the battery voltage Vbatt, this routine is exited without doing anything. On the other hand, if it is determined that the alternator voltage Valt is lower than the battery voltage Vbatt, the control delay time t _delay is calculated based on the power generation voltage Valt of the alternator 11 in step S35. Then, at step S36, it calculates a power generation start time _{t s} from the control demand time _{t 0} by subtracting the response delay time _{t Deray,} starts the minute power generation by the alternator 11. Therefore, the power generation start time _{t s,} the control request time by quickly from _{t 0} only the control delay time _{t Deray,} starting power generation of the alternator 11 is accelerated, can be eliminated delay in power generation start time _{t s.}

  As described above, in the alternator control device according to the third embodiment, the power generation voltage detection sensor 51 that detects the power generation voltage value in the alternator 11 is provided, and the power generation start delay time detection unit 106 is detected by the power generation voltage detection sensor 51. A power generation start delay time of the alternator 11 is calculated based on the power generation voltage value, and the power generation start timing setting unit 103 detects a control request to the alternator 11 after detecting a power generation stop command to the alternator 11. The power generation start timing of the alternator 11 by the control unit 101 is set based on the power generation start delay time.

  Therefore, when there is a control request to the alternator 11 after the power generation stop command is output to the alternator 11, the power generation start timing of the alternator 11 is set in consideration of the power generation start delay time of the alternator 11. 11 is that power generation is started earlier than the actual control start time, and it is possible to control the driving force of the vehicle by the alternator 11 and to suppress the power generation start delay of the alternator 11 and to perform high-precision control. It can be. At this time, by calculating the power generation start delay time of the alternator 11 based on the power generation voltage value detected by the power generation voltage detection sensor 51, the power generation start timing of the alternator 11 can be set with high accuracy.

  As described above, the alternator control device according to the present invention is useful for controlling the stop and start of power generation in the alternator according to the traveling state of the vehicle, and can be suitable for any alternator.

It is a schematic block diagram showing the control apparatus of the alternator which concerns on Example 1 of this invention. FIG. 3 is a control block diagram of an alternator control unit according to the first embodiment. 3 is a flowchart illustrating operation control of the alternator control device according to the first embodiment. It is a graph showing the change of the exciting current value from the power generation stop of an alternator to the power generation start. It is a schematic block diagram showing the control apparatus of the alternator which concerns on Example 2 of this invention. 6 is a flowchart illustrating operation control of the alternator control device according to the second embodiment. It is a schematic block diagram showing the control apparatus of the alternator which concerns on Example 3 of this invention. 10 is a flowchart illustrating operation control of the alternator control device according to the third embodiment.

Explanation of symbols

11 Alternator 17 Alternator Control Unit 31 Electronic Control Unit (ECU)
41 Excitation current detection sensor (excitation current value estimation detection means)
51 Power generation voltage detection sensor (power generation voltage value detection means)
DESCRIPTION OF SYMBOLS 101 Power generation control part 102 Power generation stop timing setting part 103 Power generation start timing setting part 104 Power generation stop detection part 105 Control request detection part 106 Power generation start delay time detection part

Claims (5)

Power generation control means capable of controlling the power generation amount in the alternator according to the running state of the vehicle;
Power generation stop detection means for detecting a power generation stop command to the alternator;
Control request detection means for detecting in advance a control request to the alternator;
After the power generation stop detection unit detects a power generation stop command to the alternator, the power generation start timing of the alternator by the power generation control unit is detected when the control request detection unit detects a control request to the alternator. Power generation start timing setting means for setting in consideration of the power generation start delay time,
An alternator control device comprising:   A power generation start delay time detecting means for detecting a power generation start delay time according to an operating state of the alternator is provided, and the power generation start timing setting means is configured to start power generation by a control request to the alternator when the power generation start delay time occurs. The alternator control device according to claim 1, wherein the timing is set earlier by a power generation start delay time.   Excitation current value estimation detection means for estimating or detecting an excitation current value in the alternator is provided, and the power generation start delay time detection means is based on the excitation current value estimated or detected by the excitation current value estimation detection means. The alternator control device according to claim 2, wherein a power generation start delay time is calculated.   Power generation voltage value detection means for detecting the power generation voltage value in the alternator is provided, and the power generation start delay time detection means calculates the power generation start delay time of the alternator based on the power generation voltage value detected by the power generation voltage value detection means. The alternator control device according to claim 2, wherein:   5. The alternator control device according to claim 3, wherein a time when the exciting current value or the generated voltage value is equal to or less than a predetermined value set in advance is set as a power generation start delay time.

Images