JPWO2009130898A1 - Power generation control device and transportation equipment - Google Patents

Abstract

The microcomputer determines a first command output current value that is greater than or equal to the target output current value and a second command output current value that is less than or equal to the target output current value. The microcomputer performs phase angle control of the three-phase mixed bridge circuit in accordance with the first command output current value in the first control period within the current control cycle, and performs the second command in the second control period within the current control cycle. The phase angle of the three-phase mixed bridge circuit is controlled according to the output current value. In this case, the microcomputer controls the first control period and the first control period so that the average value of the first command output current value and the second command output current value within the current control period is equal to the target output current value. The ratio with the control period of 2 is controlled.

Description

  The present invention relates to a power generation control device that controls an output current of a generator and a transport device including the power generation control device.

  A power generation system used for a vehicle such as an automobile has an AC generator and a regulator (see, for example, Patent Document 1). The alternator is driven by the engine and generates an alternating current. The regulator converts the alternating current generated by the alternating current generator into a direct current and outputs it. The output current of the power generation system is supplied to an electric load such as a lamp and a battery. Thereby, power is consumed by the electric load and the battery is charged.

  In the above power generation system, the value of the output current cannot be changed according to the value of the load current or the state of charge / discharge of the battery.

On the other hand, in the vehicle power generation control device described in Patent Document 2, the output current can be controlled by controlling the field current of the field winding of the three-phase AC generator.
JP-A-6-86476 JP 2002-125329 A

  In general, in a power generation system driven by a motorcycle engine, a flywheel magneto generator, which is a magnetic three-phase AC generator, is used. A permanent magnet is used for the flywheel magneto generator. Therefore, the output current cannot be controlled by controlling the field current.

  An object of the present invention is to provide a power generation control device capable of controlling an output current of an AC generator driven by an engine to an arbitrary value, and a transportation device including the power generation control device.

  (1) A power generation control device according to one aspect of the present invention is a power generation control device that controls an output current of an AC generator driven by an engine, and converts an AC current output from the AC generator into a DC current. A rectifier circuit; and a control unit that controls the output current value of the rectifier circuit to a target output current value by performing phase angle control of the rectifier circuit, wherein the control unit includes a first command output current that is equal to or greater than the target output current value. And a second command output current value equal to or less than the target output current value, and an average value of the first command output current value and the second command output current value within a predetermined period is equal to the target output current value The first control period for performing phase angle control of the rectifier circuit according to the first command output current value within the predetermined period and the second control for performing phase angle control of the rectifier circuit according to the second command output current value. It controls the ratio with the period

  In the power generation control device, an alternating current generator is driven by the engine, whereby an alternating current is output from the alternating current generator, and the alternating current is converted into a direct current by a rectifier circuit.

  The controller determines a first command output current value that is greater than or equal to the target output current value and a second command output current value that is less than or equal to the target output current value. The control unit performs phase angle control of the rectifier circuit in accordance with the first command output current value in the first control period within the predetermined period, and rectifies in accordance with the second command output current value in the second control period within the predetermined period. Controls the phase angle of the circuit. In this case, the controller controls the first control period and the second control period so that an average value of the first command output current value and the second command output current value within a predetermined period is equal to the target output current value. Control the ratio with the control period.

  Thereby, the average output current value of the rectifier circuit can be controlled to an arbitrary value by setting the target output current value to an arbitrary value. Therefore, an arbitrary output current can be supplied to the load.

  (2) The power generation control device further includes a current detector that detects an output current value of the rectifier circuit, and the control unit includes an average value of the output current values detected by the current detector within a predetermined period and a target output current value. When there is a difference, the ratio between the first control period and the second control period may be changed so that the average value of the output current values becomes equal to the target output current value based on the difference.

  In this case, the first control period and the first control period are set so that the average value of the output current values becomes equal to the target output current value based on the difference between the average value of the output current values detected by the current detector and the target output current value. The ratio to the control period of 2 is changed. Thus, the rectifier circuit is feedback-controlled so that the average output current value of the rectifier circuit is reliably equal to the target output current value. Therefore, an output current equal to the target output current value can be accurately supplied to the load.

  (3) The control unit changes the first command output current value and the second command output current value when the target output current value is changed, and the average value within a predetermined period is the target output current value. The ratio between the first control period and the second control period may be changed to be equal to.

  In this case, even when the target output current value is changed, the average output current of the rectifier circuit becomes equal to the changed target output current value.

  (4) The AC generator may be a magnet type AC generator having a permanent magnet. Even in this case, the average output current value of the rectifier circuit can be controlled to an arbitrary value.

  (5) The rectifier circuit may include a bridge circuit including a plurality of switching elements, and the control unit may perform phase angle control of the plurality of switching elements in accordance with the first and second command output current values.

  In this case, the output current value of the rectifier circuit is controlled by controlling the phase angle of the plurality of switching elements.

  (6) The first and second command output current values may have discrete values. Even in this case, the average output current value of the rectifier circuit can be made equal to an arbitrary target output current value.

  (7) A transport device according to another aspect of the present invention includes a main body, an engine provided in the main body, a drive unit that moves the main body by rotation of the engine, and an AC generator that is driven by rotation of the engine. A generator control device that controls the output current of the AC generator driven by the engine, the generator control device converting the AC current output from the AC generator into a DC current, and the phase of the rectifier circuit A control unit that controls the output current value of the rectifier circuit to a target output current value by performing angle control, and the control unit has a first command output current value that is greater than or equal to the target output current value and a value that is less than or equal to the target output current value A second command output current value is determined, and the average value of the first command output current value and the second command output current value within the predetermined period is equal to the target output current value within the predetermined period. First command output current value Thus it controls the ratio of the first control period and the second control period for phase angle control of the rectifier circuit according to the second command output current value for phase angle control of the rectifier circuit.

  In the transport device, the drive unit moves the main body by the rotation of the engine. In this case, in the power generation control device, when the AC generator is driven by the engine, an AC current is output from the AC generator, and the AC current is converted into a DC current by the rectifier circuit.

  The controller determines a first command output current value that is greater than or equal to the target output current value and a second command output current value that is less than or equal to the target output current value. The control unit performs phase angle control of the rectifier circuit in accordance with the first command output current value in the first control period within the predetermined period, and rectifies in accordance with the second command output current value in the second control period within the predetermined period. Controls the phase angle of the circuit. In this case, the controller controls the first control period and the second control period so that an average value of the first command output current value and the second command output current value within a predetermined period is equal to the target output current value. Control the ratio with the control period.

  Thereby, the average output current value of the rectifier circuit can be controlled to an arbitrary value by setting the target output current value to an arbitrary value. Therefore, an arbitrary output current can be supplied to the load.

  According to the present invention, it is possible to control the output current of an AC generator driven by an engine to an arbitrary value.

FIG. 1 is a side view of a motorcycle according to a first embodiment of the present invention. FIG. 2 is a block diagram showing a configuration of an electric system of the motorcycle provided with the power generation control device according to the first embodiment of the present invention. FIG. 3 is a waveform diagram showing examples of a basic clock signal, a trigger signal, an output voltage, and an output current. FIG. 4 is a waveform diagram showing an example of the basic clock signal, trigger signal, output voltage, and output current. FIG. 5 is a diagram illustrating an example of an output current in the power generation control device. FIG. 6 is a diagram illustrating an example of output current control in the power generation control device. FIG. 7 is a flowchart showing an output current control process of the power generation control device by the CPU of the microcomputer. FIG. 8 is a block diagram showing a configuration of an electric system of a motorcycle provided with the power generation control device according to the second embodiment of the present invention. FIG. 9 is a diagram illustrating an example of an output current in the power generation control device. FIG. 10 is a flowchart showing an output current control process of the power generation control device by the CPU of the microcomputer.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following embodiments, a case where the power generation control device according to the present invention is applied to a scooter type motorcycle as an example of transportation equipment will be described.

(1) First Embodiment (1-1) Configuration of Power Generation Control Device and Motorcycle FIG. 1 is a side view of a motorcycle according to a first embodiment of the present invention. FIG. 2 is a block diagram showing a configuration of an electric system of the motorcycle provided with the power generation control device according to the first embodiment of the present invention.

  In the motorcycle 100 shown in FIG. 1, a head pipe 32 is provided at the front end of the main body frame 31. A handle 33 is provided at the upper end of the head pipe 32. A front fork 34 is attached to the lower end of the head pipe 32. In this state, the front fork 34 is rotatable within a predetermined angle range around the axis of the head pipe 32. A front wheel 35 is rotatably supported at the lower end of the front fork 34.

  An engine 30 is provided at the center of the main body frame 31. The engine 30 is provided with a flywheel magneto generator (hereinafter abbreviated as magneto generator) 1, and a power generation control device 2 is provided in the vicinity of the magneto generator 1. The battery 3 is provided in the lower part of the main body sheet 36 or in the side cover.

  A rear arm 37 is connected to the main body frame 31 so as to extend rearward of the engine 30. The rear arm 37 rotatably holds the rear wheel 38 and the rear wheel driven sprocket 39. A chain 40 is attached to the rear wheel driven sprocket 39.

  A headlight 4 a is attached in front of the head pipe 32, and a taillight 4 b is attached in the rear of the main body sheet 36.

  The electric system in FIG. 2 includes a magneto generator 1, a power generation control device 2, a battery 3, and an electric load 4. The electric load 4 includes, for example, the headlight 4a, the taillight 4b, the brake lamp, and the blinker shown in FIG.

  The magneto generator 1 is a magnetic three-phase AC generator, and has a rotor and a stator. A permanent magnet is attached to the rotor, and stator coils 1a, 1b, and 1c are provided on the stator. The magneto generator 1 generates power with the stator coils 1a to 1c and generates an alternating current when the rotor rotates together with the crankshaft of the engine 30 (FIG. 1).

  The power generation control device 2 includes a microcomputer 5, a voltage dividing circuit 6, and a three-phase mixed bridge circuit 7.

  Stator coils 1a, 1b, 1c of magneto generator 1 are connected to nodes Na, Nb, Nc. The three-phase mixed bridge circuit 7 includes three diodes 7a and three thyristors 7b. Three diodes 7a are connected between the negative power supply line L2 and the nodes Na, Nb, and Nc, respectively, and three thyristors 7b are connected between the positive power supply line L1 and the nodes Na, Nb, and Nc, respectively. Is done. The three-phase mixed bridge circuit 7 converts the alternating current generated by the magneto generator 1 into a direct current. The voltage dividing circuit 6 divides the alternating voltages of the nodes Na, Nb, and Nc, respectively, and outputs the divided voltages to the microcomputer 5.

  The microcomputer 5 includes an I / O (input / output) port 51, a CPU (central processing unit) 52, an A / D (analog / digital) converter 53, and a memory 54. The A / D converter 53 converts the output voltage of the voltage dividing circuit 6 into a digital voltage value. The memory 54 is composed of, for example, a non-volatile memory, and stores a control program, a target output current value, first and second command output current values, a duty ratio, and the like described later.

  The CPU 52 operates in synchronization with the basic clock signal CK. The basic clock signal CK may be generated inside the microcomputer 5 or may be given from the outside of the microcomputer 5. The operating frequency of the microcomputer 5 is determined by the frequency of the basic clock signal CK.

  The CPU 52 detects the rotational speed of the engine 10 and its fluctuation based on the voltage value obtained by the A / D converter 53. Further, the CPU 52 executes an output current control process, which will be described later, according to a control program stored in the memory 54, and gives a trigger signal to the gate of the thyristor 7b via the I / O port 51, thereby controlling the phase angle of the thyristor 7b. Do. The current output from the three-phase mixed bridge circuit 7 is controlled by controlling the timing of the trigger signal.

  A battery 3 and an electric load 4 are connected between the positive power line L1 and the negative power line L2. The current output from the three-phase mixed bridge circuit 7 is supplied to the battery 3 and the electric load 4. Thereby, the battery 3 is charged and the electric load 4 consumes power.

(1-2) Operation of Power Generation Control Device 2 Next, the operation of the power generation control device 2 according to the present embodiment will be described. 3 and 4 are waveform diagrams showing examples of the basic clock signal CK, the trigger signal TR, the output voltage, and the output current.

  3 and 4, the basic clock signal CK supplied to the CPU 52, the trigger signal TR supplied to one thyristor 7b, the output voltage for one phase of the three-phase mixed bridge circuit 7, and the three-phase mixed bridge circuit 7 The output current for one phase is shown. The period T of the basic clock signal CK corresponds to the control period of the microcomputer 5 and is, for example, 40 μsec. The trigger signal TR rises in synchronization with the basic clock signal CK. Therefore, the timing of the trigger signal TR is controlled in units of the control cycle T.

  In the example of FIG. 3, the CPU 52 detects the rising edge of the output voltage at time t1, and raises the pulse of the trigger signal TR in synchronization with the rising edge of the basic clock signal CK at time t2. The thyristor 7b is turned on in response to the rising edge of the trigger signal TR. As a result, current flows through the diode 7a and the thyristor 7b from time t2 to time t3. In the example of FIG. 3, the value of the output current is 7.5A.

  In the example of FIG. 4, the CPU 52 detects the rising edge of the output voltage at time t1, and raises the pulse of the trigger signal TR in synchronization with the rising edge of the basic clock signal CK at time t3. The thyristor 7b is turned on in response to the rising edge of the trigger signal TR. As a result, current flows through the diode 7a and the thyristor 7b from time t4 to time t3. In the example of FIG. 4, the value of the output current is 8.5A.

  FIG. 5 is a diagram illustrating an example of an output current in the power generation control device 2. In FIG. 5, when the pulse of the trigger signal TR is raised at the timing of the example of FIG. 3, the value of the output current is 7.5A, and when the pulse of the trigger signal TR is raised at the timing of the example of FIG. The value of the output current is 8.5A.

  Since the timing of the trigger signal TR is controlled in units of the control cycle T, the output current has a discrete value. In the above case, the value of the output current cannot be controlled to 8.0 A by controlling the timing (phase angle) of the trigger signal TR. In the power generation control device 2 according to the present embodiment, the output current can be controlled to an arbitrary value by the following method.

  The CPU 52 sets the current control cycle Tc. Here, the current control cycle Tc is set sufficiently larger than the rotation cycle (for example, 50 msec) in the idling state of the engine 30. The current control cycle Tc is composed of a first control period ta and a second control period tb as shown in the following equation (1).

Tc = ta + tb (1)
Further, the ratio of the first control period ta to the current control period Tc is called a duty ratio Rd.

Rd = ta / Tc = ta / (ta + tb) (2)
Here, the first control period ta and the second control period tb are set to an integral multiple of the control cycle T of the microcomputer 5. The duty ratio Rd may be changed by making the current control period Tc constant and adjusting the first control period ta and the second control period tb. Further, the duty ratio Rd may be changed by making the first control period ta constant and adjusting the second control period tb and the current control period Tc.

  Here, the CPU 52 controls the output current of the three-phase mixed bridge circuit 7 according to the first command output current value I1 in the first control period ta, and the second command output current value I2 in the second control period tb. The output current of the three-phase mixed bridge circuit 7 is controlled according to That is, the CPU 52 controls the phase angle of the thyristor 7b so that the output current of the three-phase mixed bridge circuit 7 becomes equal to the first command output current value I1 in the first control period ta, and the second control period tb. The phase angle of the thyristor 7b is controlled so that the output current of the three-phase mixed bridge circuit 7 becomes equal to the second command output current value I2.

  In this case, the CPU 52 uses the first command output current value I1 and the second command output current value I2 so that the average output current value of the three-phase mixed bridge circuit 7 in the current control period Tc is equal to the target output current value Itar. And the duty ratio Rd is set. The duty ratio Rd is set so as to satisfy the following expression (3).

Itar = I1 * Rd + I2 * (1-Rd) (3)
As described above, the CPU 52 controls the first command output current value I1, the second command output current value I2, and the duty ratio Rd, thereby obtaining the average output current value of the three-phase mixed bridge circuit 7 as an arbitrary target output. The current value Itar can be controlled.

  FIG. 6 is a diagram illustrating an example of output current control in the power generation control device 2. In the example of FIG. 6, the target output current value Itar is set to 8.0A. In this case, the first command output current value I1 is set to 7.5A, and the second command output current value I2 is set to 8.5A. The duty ratio Rd is set to 0.5. That is, the first control period ta and the second control period tb are equal. In this case, the average output current value Iave is 8.0A.

  FIG. 7 is a flowchart showing an output current control process of the power generation control device 2 by the CPU 52 of the microcomputer 5.

  It is assumed that initial values of the target output current value Itar, the first command output current value I1, the second command output current value I2, and the duty ratio Rd are set in advance.

  First, the CPU 52 determines whether or not the target output current value Itar has been changed (step S1). The target output current value Itar is changed based on the state of the motorcycle 100, for example. In this case, a plurality of target output current values Itar are stored in advance in the memory 54 corresponding to the state of the motorcycle 100. The state of the motorcycle 100 is, for example, an idling state, an acceleration state, a deceleration state, and a constant speed state of the engine 30. The state of the motorcycle 100 is not limited to these states. Alternatively, the target output current value Itar may be changed based on the charge state and the discharge state of the battery 3.

  When the target output current value Itar is not changed, the CPU 52 performs the phase angle control of the thyristor 7b by the trigger signal TR during the first control period ta at the first command output current value I1 (step S2).

  Subsequently, the CPU 52 performs phase angle control of the thyristor 7b with the trigger signal TR during the second control period tb with the second command output current value I2 (step S3). Thereafter, the CPU 52 returns to the process of step S1.

  By repeating the processes of steps S1 to S3, the average output current value Iave is controlled to the target output current value Itar.

  When the target output current value Itar is changed in step S1, the CPU 52 determines the first command output current value I1 and the second command output current value I2 that are close to the changed target output current value Itar ( Step S4). In this case, the first command output current value I1 and the second command output current value I2 are set to values above and below the target output current value Itar.

  Next, the CPU 52 determines the duty ratio Rd from the above equation (3) (step S3). Accordingly, the first control period ta and the second control period tb are calculated from the above equation (2). Thereafter, the CPU 52 returns to the process of step S1, and changes the first command output current value I1, the second command output current value I2, the duty ratio Rd, the first control period ta, and the second control period tb. The processes of steps S1 to S3 are repeatedly executed using. As a result, the average output current value Iave is controlled to the changed target output current value Itar.

(1-3) Effects of the power generation control device 2 According to the power generation control device 2 according to the first embodiment, the first target output current value Itar is determined under the restriction of the control cycle T of the microcomputer 5. It can be set to any value between the command output current value I1 and the second command output current value I2. Thereby, the average output current value Iave of the three-phase mixed bridge circuit 7 can be controlled to an arbitrary value. Accordingly, an arbitrary output current can be supplied to the electric load and the battery 3. Further, by arbitrarily changing the target output current value Itar based on the state of the motorcycle 100 or the state of the battery 3, the value of the output current supplied to the electric load and the battery 3 can be arbitrarily changed. .

(2) Second Embodiment (2-1) Configuration of Power Generation Control Device and Motorcycle FIG. 8 shows the configuration of the electric system of a motorcycle equipped with the power generation control device according to the second embodiment of the present invention. FIG.

  The configuration of the power generation control device 2 in FIG. 8 is different from the configuration of the power generation control device 2 in FIG. 1 in that a current sensor 8 that detects the output current value of the three-phase mixed bridge circuit 7 is further provided. In the present embodiment, the current sensor 8 is connected to the positive power supply line L2. An output signal of the current sensor 8 is given to the microcomputer 5. The A / D converter 53 of the microcomputer 5 converts the output signal of the current sensor 8 into a digital current value.

(2-2) Operation of the power generation control device 2 The actual output current value from the three-phase mixing bridge circuit 7 and the first command output current value I1 or second due to variations in the characteristics of the magneto generator 1 or temperature changes, etc. There may be an error between the command output current value I2. In the power generation control device 2 according to the present embodiment, even when such an error occurs, the average output current value of the three-phase mixed bridge circuit 7 can be matched with the target output current value Itar by the following method.

  Next, the operation of the power generation control device 2 according to the present embodiment will be described. FIG. 9 is a diagram illustrating an example of an output current in the power generation control device 2.

  In FIG. 9, the target output current value Itar is 8.0A. In this case, the first command output current value I1 is set to 7.5A, the second command output current value I2 is set to 8.5A, and the duty ratio Rd is set to 0.5.

  In the example of FIG. 9, when the phase angle control is performed according to the first command output current value I1, the output current value Ir1 of the three-phase mixing bridge circuit 7 is the first due to the variation in the characteristics of the magneto generator 1 or the temperature change. 1 does not coincide with the command output current value I1, and becomes 7.0A. When the phase angle control is performed according to the second command output current value I2, the output current value Ir2 of the three-phase mixed bridge circuit 7 matches the second command output current value I2.

  In this case, from time t10 to time t11, the actual average output current value Iave from the three-phase mixed bridge circuit 7 is lower than the target output current value Itar.

  Therefore, after time t11, the duty ratio Rd is changed based on the output current value detected by the current sensor 8. In the example of FIG. 9, the duty ratio Rd is changed to a value smaller than 0.5. That is, the second control period tb is longer than the first control period ta. As a result, the actual average output current value Iave matches the target output current value Itar.

  FIG. 10 is a flowchart showing an output current control process of the power generation control device 2 by the CPU 52 of the microcomputer 5.

  It is assumed that initial values of the target output current value Itar, the first command output current value I1, the second command output current value I2, and the duty ratio Rd are set in advance.

  The current integrated value of the output current value in the first control period ta is I1sum, and the current integrated value of the output current value in the second control period tb is I2sum. Further, the integrated value is I1'sum until the previous output current value in the first control period ta, and the integrated value is I2'sum until the previous output current value in the second control period tb. The initial values of the integrated values I1'sum and I2'sum are zero.

  First, the CPU 52 determines whether or not the target output current value Itar has been changed (step S11). The target output current value Itar is changed based on, for example, the state of the motorcycle 100 or the state of the battery 3 as in the first embodiment.

  When the target output current value Itar is not changed, the CPU 52 determines whether the current command current value is the first command output current value I1 or the second command output current value I2 (step S12). .

  If the current command output current value is the first command output current value I1 in step S12, the CPU 52 controls the phase angle of the thyristor 7b by the trigger signal TR with the first command output current value I1 (step S12). S13).

  Further, the CPU 52 reads the output current value I1r detected by the current sensor 8 (step S14). Next, the CPU 52 adds the output current value I1r to the integrated value I1'sum until the previous time in the first control period ta, and sets the addition result as the current integrated value I1sum in the first control period ta (step S15).

  When the current command output current value is the second command output current value I2 in step S12, the CPU 52 performs the phase angle control of the thyristor 7b by the trigger signal TR with the second command output current value I2 (step S12). S16).

  Further, the CPU 52 reads the output current value I2r detected by the current sensor 8 (step S17). Next, the CPU 52 adds the output current value I2r to the integrated value I2'sum until the previous time in the second control period tb, and sets the addition result as the current integrated value I2sum in the second control period tb (step S18).

  Next, the CPU 52 determines whether or not the current control period Tc has elapsed (step S19). That is, the CPU 52 determines whether or not the first control period ta and the second control period tb have ended. If the current control period Tc has not elapsed, the CPU 52 returns to the process of step S11.

  When the current control cycle Tc has not elapsed, the CPU 52 calculates the average output current value Iave within the current control cycle Tc from the following equation (4) (step S20).

Iave = (I1sum + I2sum) / (ta + tb) (4)
Then, the CPU 52 determines whether or not the average output current value Iave is equal to the target output current value Itar (step S21).

  When the average output current value Iave is equal to the target output current value Itar, the CPU 52 returns to the process of step S11.

  When the average output current value Iave is not equal to the target output current value Itar, the CPU 52 determines the first average output current value I1ave in the first control period ta and the second average output current in the second control period tb. The value I2ave is calculated from the following equations (5) and (6) (step S22).

I1ave = I1sum / TA (5)
I2ave = I2sum / TB (6)
In the above equations (5) and (6), TA is the number of readings of the output current value I1r within the first control period ta, and TB is the number of readings of the output current value I2r within the second control period tb. It is.

  Further, the CPU 52 calculates the duty ratio from the following equation (7) based on the first average output current value I1ave and the second average output current value I2ave so that the average output current value Iave is equal to the target output current value Itar. Rd is calculated (step S23).

Rd (I1ave-Itar) + (1-Rd) (I2ave-Itar) = 0 (7)
Thereby, the duty ratio Rd is updated. The first control period ta and the second control period tb are updated with the update of the duty ratio Rd. Thereafter, the CPU 52 returns to the process of step S11. By repeating the processes of steps S11 to S23, the average output current value Iave is feedback-controlled to the target output current value Itar.

  When the target output current value Itar is changed in step S11, the CPU 52 determines the first command output current value I1 and the second command output current value I2 that are close to the changed target output current value Itar ( Step S24). In this case, the first command output current value I1 and the second command output current value I2 are set to values above and below the target output current value Itar.

  Next, the CPU 52 determines the duty ratio Rd from the above equation (3) (step S25). Accordingly, the first control period ta and the second control period tb are calculated from the above equation (2). Thereafter, the CPU 52 returns to the process of step S11, and the changed first command output current value I1, second command output current value I2, duty ratio Rd, first control period ta, and second control period tb. Steps S11 to S23 are repeatedly executed using As a result, the average output current value Iave is feedback controlled to the target output current value Itar after the change.

(2-3) Effects of the power generation control device 2 According to the power generation control device 2 according to the second embodiment, the first output current value Itar is determined under the restriction of the control cycle T of the microcomputer 5. It can be set to any value between the command output current value I1 and the second command output current value I2. Thereby, the average output current value Iave of the three-phase mixed bridge circuit 7 can be controlled to an arbitrary value. Accordingly, an arbitrary output current can be supplied to the electric load and the battery 3. Further, by arbitrarily changing the target output current value Itar based on the state of the motorcycle 100 or the state of the battery 3, the value of the output current supplied to the electric load and the battery 3 can be arbitrarily changed. .

  Furthermore, even if there is an error between the first and second command output current values I1 and I2 and the actual output current value from the three-phase mixed bridge circuit 7, the average output current value of the three-phase mixed bridge circuit 7 The three-phase mixed bridge circuit 7 can be feedback-controlled so that Iave is surely equal to the target output current value Itar. Therefore, an output current that matches the target output current value Itar can be accurately supplied to the electric load and the battery 3.

(3) Other Embodiments In the above embodiment, the flywheel magneto generator 1 is used as an example of an AC generator. However, the present invention is not limited to this, and other magneto generators may be used. For example, an AC generator having a field winding may be used as the AC generator.

  Moreover, in the said embodiment, although the three-phase mixing bridge circuit 7 comprised by the diode 7a and the thyristor 7b is used as a rectifier circuit, it is not limited to this, You may use another rectifier circuit. For example, various half-wave rectifier circuits and various full-wave rectifier circuits can be used as the rectifier circuit. A transistor may be used as the switching element instead of the thyristor 7b.

  Furthermore, in the said embodiment, although a control part is comprised by the microcomputer 5 and a control program, it is not limited to this, You may comprise a control part by a logic circuit.

  In the above-described embodiment, the power generation control device 2 is applied to the scooter type motorcycle 100 as an example of transportation equipment, but is not limited thereto. The power generation control device 2 may be applied to a motorcycle other than the scooter type (for example, a saddle riding type motorcycle).

  The power generation control device 2 can also be applied to various transportation devices such as an automatic tricycle, an automatic four-wheel vehicle, and a ship.

  Furthermore, the power generation control device 2 can also be applied to transportation equipment that does not have a battery.

(4) Correspondence of correspondence between each constituent element of claims and each constituent element of the embodiment Hereinafter, an example of correspondence between each constituent element of the claims and each constituent element of the embodiment will be described. Is not limited to the following examples.

  In the above embodiment, the magneto generator 1 is an example of an AC generator or a magnet type AC generator, the three-phase mixed bridge circuit 7 is an example of a rectifier circuit or a bridge circuit, and the microcomputer 5 is an example of a control unit. The current sensor 8 is an example of a current detector, and the thyristor 7b is an example of a switching element. The current control cycle Tc is an example of a predetermined period, the first control period ta is an example of a first control period, and the second control period tb is an example of a second control period.

  Further, the part of the motorcycle 100 excluding the power generation control device 2 and the rear wheel 39 is an example of a main body, and the rear wheel 39 is an example of a drive unit.

  As each constituent element in the claims, various other constituent elements having configurations or functions described in the claims can be used.

  The present invention can be widely applied to power generation systems in various transportation devices such as motorcycles, motor tricycles, motor four-wheel vehicles, and ships.

Claims (7)

A power generation control device for controlling an output current of an AC generator driven by an engine,
A rectifier circuit for converting alternating current output from the alternating current generator into direct current;
A control unit that controls the output current value of the rectifier circuit to a target output current value by performing phase angle control of the rectifier circuit;
The control unit determines a first command output current value equal to or greater than the target output current value and a second command output current value equal to or less than the target output current value, and the first command output current within a predetermined period. A phase angle control of the rectifier circuit is performed in accordance with the first command output current value within the predetermined period so that an average value of the value and the second command output current value becomes equal to the target output current value. A power generation control device that controls a ratio between one control period and a second control period in which phase angle control of the rectifier circuit is performed according to the second command output current value. A current detector for detecting an output current value of the rectifier circuit;
The control unit, when there is a difference between the average value of the output current value detected by the current detector within the predetermined period and the target output current value, the average value of the output current value based on the difference The power generation control device according to claim 1, wherein a ratio between the first control period and the second control period is changed so that becomes equal to the target output current value. The control unit changes the first command output current value and the second command output current value when the target output current value is changed, and the average value within the predetermined period The power generation control device according to claim 1, wherein a ratio between the first control period and the second control period is changed so as to be equal to a target output current value. The power generation control device according to claim 1, wherein the AC generator is a magnet type AC generator having a permanent magnet. The rectifier circuit includes a bridge circuit including a plurality of switching elements,
The power generation control device according to claim 1, wherein the control unit performs phase angle control of the plurality of switching elements in accordance with the first and second command output current values. The power generation control device according to claim 1, wherein the first and second command output current values have discrete values. The main body,
An engine provided in the main body,
A drive unit that moves the main body by rotation of the engine;
An alternator driven by rotation of the engine;
A power generation control device that controls an output current of an AC generator driven by the engine,
The power generation control device
A rectifier circuit for converting alternating current output from the alternating current generator into direct current;
A control unit that controls the output current value of the rectifier circuit to a target output current value by performing phase angle control of the rectifier circuit;
The control unit determines a first command output current value equal to or greater than the target output current value and a second command output current value equal to or less than the target output current value, and the first command output current within a predetermined period. A phase angle control of the rectifier circuit is performed in accordance with the first command output current value within the predetermined period so that an average value of the value and the second command output current value becomes equal to the target output current value. A transportation device that controls a ratio between one control period and a second control period in which phase angle control of the rectifier circuit is performed according to the second command output current value.

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