JP2013165559A - Power generation control device and transportation equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power generation control device with reduced cost and transportation equipment equipped with the power generation control device.SOLUTION: When a voltage conversion circuit 6 is under a first connection state, capacitors C1 and C2 are charged with a voltage of a battery 3. When the voltage conversion circuit 6 is under a second connection state, the capacitor C2 is charged with a voltage higher than that of the battery 3 by the battery 3 and the capacitor C1 connected in series. By a control part 5, the voltage conversion circuit 6 is switched alternately between the first connection state and the second connection state. Consequently, the capacitor C2 is charged to a voltage that is higher than the voltage of the battery 3 by a specified value or more. Under this state, the voltage that is higher than the voltage of the battery 3 by the specified value or more is given from the capacitor C2 to a switching element of a rectification circuit as a trigger signal. As a result, the switching element is placed under a conduction state. AC current outputted from an AC power generator in a conduction period of the switching element is converted into DC current by the rectification circuit.

Description

  The present invention relates to a power generation control device connected to a battery and an AC generator, and a transportation device including the power generation control device.

  A vehicle such as an automobile is provided with a battery, an AC generator, and a power generation control device. The alternator is driven by the engine. The power generation control device includes a rectification unit in which a plurality of diodes and a plurality of thyristors are bridge-connected (see, for example, Patent Documents 1 to 3). The alternating current generated by the alternating current generator is converted into direct current by the rectifier. The converted direct current is supplied to an electric device and a battery of the vehicle.

JP 2008-271707 A JP 2008-283799 A JP 2000-011016 A

  In order to turn on the thyristor of the rectification unit of the power generation control device, it is necessary to supply a trigger signal having a voltage higher than the voltage of the battery by a predetermined value or more to the gate of the thyristor. In order to generate a voltage higher than that of the battery, a switching regulator IC (integrated circuit) is used. However, since the switching regulator IC is expensive, the cost of the power generation control device and the vehicle increases.

  The objective of this invention is providing the electric power generation control apparatus with which cost was reduced, and a transport equipment provided with the same.

  (1) A power generation control device according to a first aspect of the present invention is a power generation control device connected to a battery and an AC generator, and is rendered conductive by being provided with a trigger signal having a voltage higher than the battery voltage by a predetermined value or more. A rectifier circuit configured to convert an alternating current output from the alternating current generator into a direct current during a conduction period of the switching element, a first and a second capacitor, A first connection state in which the first and second capacitors are connected in parallel with each other and the first and second capacitors are charged with the voltage of the battery, and the first capacitor is connected in series with the battery and the second capacitor Is switched between a battery connected in series and a second connection state charged with a voltage higher than the voltage of the battery by the first capacitor The second capacitor is charged to a voltage higher than the voltage of the battery by a predetermined value or more by alternately switching the voltage conversion circuit configured in a function and the voltage conversion circuit between the first connection state and the second connection state. And a control unit configured to control the phase angle of the rectifier circuit by applying a voltage higher than the battery voltage by a predetermined value or more as a trigger signal from the second capacitor to the switching element.

  In this power generation control device, when the voltage conversion circuit is in the first connection state, the first and second capacitors are charged with the voltage of the battery. When the voltage conversion circuit is in the second connection state, the battery and the first capacitor connected in series charge the second capacitor with a voltage higher than the voltage of the battery. The voltage conversion circuit is alternately switched between the first connection state and the second connection state by the control unit. As a result, the second capacitor is charged to a voltage higher than the voltage of the battery by a predetermined value or more. In this state, a voltage higher than the battery voltage by a predetermined value or more is given as a trigger signal from the second capacitor to the switching element of the rectifier circuit. As a result, the switching element becomes conductive. The alternating current output from the alternating current generator during the conduction period of the switching element is converted into direct current by the rectifier circuit. In this way, phase angle control of the rectifier circuit is performed.

  According to this configuration, a trigger signal having a voltage higher than the voltage of the battery by a predetermined value or more can be obtained by using the inexpensive first and second capacitors without providing an expensive switching regulator integrated circuit. Therefore, the cost of the power generation control device can be reduced.

  (2) The control unit alternately switches the voltage conversion circuit between the first connection state and the second connection state a plurality of times during one cycle of the phase angle control of the rectifier circuit, thereby connecting the second capacitor to the battery. The battery may be configured to be charged to a voltage higher than a predetermined voltage by a predetermined value or more.

  In this case, the second capacitor is alternately charged a plurality of times at a voltage higher than the battery voltage and the battery voltage during one cycle of the phase angle control of the rectifier circuit. Thereby, even when the voltage of the first capacitor added to the battery voltage in the second connection state is small, the second capacitor is connected to the battery in a period sufficiently shorter than one cycle of the phase angle control of the rectifier circuit. It can be charged to a voltage higher than the voltage by a predetermined value or more. As a result, the control unit can reliably control the phase angle of the rectifier circuit.

  (3) The AC generator may be driven by the engine, and the rectifier circuit may be connected to the battery so as to provide the converted DC current to the battery.

  In this case, an alternating current is output from the alternating current generator driven by the engine, and the alternating current is converted into a direct current by the rectifier circuit. The direct current converted by the rectifier circuit is given to the battery. Thereby, the battery is charged. Here, the voltage of the battery varies depending on the engine speed and the phase angle control of the rectifier circuit. Even in such a case, in this power generation control device, the rectifier circuit is switched between the first connection state and the second connection state, so that a voltage higher than the battery voltage by a predetermined value or more is applied to the switching element as a trigger signal. As given. Therefore, the phase angle control of the rectifier circuit can be reliably performed regardless of the fluctuation of the battery voltage.

  (4) The switching element may include a thyristor. In this case, the rectifier circuit can be configured with a small number of components.

  (5) The voltage conversion circuit further includes a switching circuit configured to switch an electrical connection between the battery, the first capacitor, and the second capacitor, and the control unit controls the voltage by controlling the switching circuit. The conversion circuit may be configured to be selectively switched between the first and second connection states.

  In this case, the control unit can easily switch the voltage conversion circuit between the first connection state and the second connection state.

  (6) The switching circuit includes one or more switches that connect the first and second capacitors in parallel to each other in the first connection state, and that connect the first capacitor to the battery in series in the second connection state. May be included.

  In this case, the control unit can easily switch the voltage conversion circuit between the first connection state and the second connection state using a switching circuit having a simple configuration.

  (7) The one or more switches of the switching circuit include a first switch connected between the first node and the positive electrode of the battery, and a first switch connected between the first node and the negative electrode of the battery. A first unidirectional conducting element connected between the positive electrode of the battery and the second node so as to pass a current from the positive electrode of the battery to the second node; A second unidirectional conducting element connected between the second node and the third node so as to allow current to flow from the second node to the third node, wherein the first capacitor comprises: The second capacitor is connected between the third node and the negative electrode of the battery, and the control unit opens the first switch and connects the second capacitor to the second node. Voltage conversion circuit by closing switch 2 Switch to the first connection state may be switched voltage conversion circuit to the second connection state by the first switch to the second switch while in the closed state to the open state.

  In this case, the control unit can reliably switch the voltage conversion circuit between the first connection state and the second connection state using a switching circuit having a simple configuration.

  (8) The AC generator includes a three-phase AC generator, the rectifier circuit further includes first, second, and third rectifier elements, and the switching element is the first, second, and third switching elements. The first, second and third switching elements and the first, second and third rectifying elements are bridge-connected to convert the alternating current output by the three-phase alternating current generator into direct current. May be.

  In this case, the rectifier circuit can convert the three-phase alternating current output by the three-phase alternating current generator into a direct current.

  (9) The AC generator includes a single-phase AC generator, the rectifier circuit further includes first and second rectifier elements, the switching element includes first and second switching elements, and The second switching element and the first and second rectifying elements may be bridge-connected so as to convert an alternating current output by the single-phase alternating current generator into a direct current.

  In this case, the rectifier circuit can convert the single-phase alternating current output by the single-phase alternating current generator into a direct current.

  (10) A transport device according to a second 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, an AC generator driven by rotation of the engine, The power generation control device according to the first aspect of the present invention controls the output current of the AC generator driven by the engine.

  In this transportation device, the drive unit moves the main body by the rotation of the engine. Moreover, an alternating current is output from the alternating current generator driven by the engine, and the alternating current is converted into a direct current by the rectifier circuit of the power generation control device.

  Since this power generation control device is used for this transportation device, a trigger having a voltage higher than the voltage of the battery by a predetermined value by the inexpensive first and second capacitors without providing an expensive switching regulator integrated circuit. A signal can be obtained. Therefore, the cost of transport equipment can be reduced.

  ADVANTAGE OF THE INVENTION According to this invention, the cost of a power generation control apparatus and transport equipment provided with the same can be reduced.

1 is a side view of a motorcycle including a power generation control device according to an embodiment of the present invention. 1 is a block diagram showing a configuration of an electric system of a motorcycle including a power generation control device according to an embodiment of the present invention. It is a wave form diagram which shows the example of a basic clock signal, a trigger signal, an output voltage, and an output current. It is a circuit diagram which shows an example of a structure of a voltage converter circuit. FIG. 5 is a timing chart for explaining an example of the operation of the voltage conversion circuit of FIG. 4. It is a circuit diagram for demonstrating operation | movement of a voltage converter circuit. It is a block diagram which shows the structure of the electric power generation control apparatus which concerns on other embodiment. It is a circuit diagram which shows the other example of a structure of a voltage conversion circuit.

  Hereinafter, a power generation control device according to an embodiment 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) Configuration of Power Generation Control Device and Motorcycle FIG. 1 is a side view of a motorcycle including a power generation control device according to an embodiment of the present invention. FIG. 2 is a block diagram showing a configuration of an electric system of the motorcycle including the power generation control device according to the 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, taillight 4b, brake lamp, and turn signal 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 control unit 5, a voltage conversion circuit 6, and a rectification circuit 7. The control unit 5 includes, for example, a CPU (Central Processing Unit) and a memory, or a microcomputer. The control unit 5 operates in synchronization with the basic clock signal. The basic clock signal may be generated inside the control unit 5 or may be given from the outside of the control unit 5. The operating frequency of the control unit 5 is determined by the frequency of the basic clock signal.

  The rectifier circuit 7 is a three-phase mixed bridge circuit including three thyristors Ta, Tb, Tc and three diodes Da, Db, Dc. The anodes A of the thyristors Ta to Tc are connected to the nodes Na to Nc, respectively, and the cathodes K of the thyristors Ta to Tc are connected to the positive power supply line L1. The cathodes K of the diodes Da to Dc are connected to the nodes Na to Nc, respectively, and the anodes A of the diodes Da to Dc are connected to the negative power supply line L2.

  Stator coils 1a to 1c of magneto generator 1 are connected to nodes Na to Nc, respectively. Thereby, the rectifier circuit 7 converts the alternating current generated by the magneto generator 1 into a direct current. The control unit 5 controls the phase angle of the thyristors Ta to Tc by applying trigger signals TRa, TRb, and TRc to the gates G of the thyristors Ta to Tc of the rectifier circuit 7 through the voltage conversion circuit 6, respectively. Details of the voltage conversion circuit 6 will be described later. The current output from the rectifier circuit 7 is controlled by controlling the timing of the trigger signals TRa to TRc.

  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 rectifier 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.

(2) Operation of Power Generation Control Device Next, the operation of the power generation control device 2 according to the present embodiment will be described. FIG. 3 is a waveform diagram showing examples of a basic clock signal, a trigger signal, an output voltage, and an output current.

  FIG. 3 shows the basic clock signal CK supplied to the control unit 5, the trigger signal TRa supplied to the thyristor Ta, and the output voltage and output current for one phase of the rectifier circuit 7. The period Tck of the basic clock signal CK corresponds to the control period of the control unit 5 and is, for example, 40 μsec. The trigger signal TRa rises in synchronization with the basic clock signal CK. Therefore, the timing of the trigger signal TRa is controlled in units of the control cycle Tck.

  In the example of FIG. 3, the control unit 5 detects the rising edge of the output voltage at time t1, and raises the pulse of the trigger signal TRa in synchronization with the rising edge of the basic clock signal CK at time t2. In response to the rising edge of the trigger signal TRa, the thyristor Ta is turned on. Thereby, a current flows through the diode Da and the thyristor Ta from the time point t2 to the time point t3. The control unit 5 can control the value of the output current by controlling the timing (phase angle) of the trigger signal TRa.

  Similarly, the control unit 5 controls the timings of the trigger signals TRb and TRc based on the output voltages for the remaining two phases of the rectifier circuit 7.

  The time from when the control unit 5 detects the rising of the output voltage for one phase of the rectifier circuit 7 until the next detection of the rising of the output voltage for one phase is called a period T. The period T decreases as the rotational speed of the magneto generator 1 of FIG. 2, that is, the engine 30 of FIG. 1 increases. When the rotational speed of the engine 30 is maximum, the period T is minimum. The minimum value (minimum period) Tmin of the period T is, for example, 2.5 ms.

(3) Configuration and operation of voltage conversion circuit In order to turn on the thyristors Ta to Tc of the rectifier circuit 7 in FIG. 2, a voltage (for example, about 4 V) higher than the voltage of the battery 3 by a predetermined voltage (built-in voltage) is required. The trigger signals TRa to TRc need to be supplied to the gates G of the thyristors Ta to Tc. Therefore, the voltage conversion circuit 6 converts the voltage of the battery 3 into a voltage higher than the voltage of the battery 3 by a predetermined voltage or more, and uses the converted voltage as trigger signals TRa to TRc at the timing of the control signal given from the control unit 5. Output.

  FIG. 4 is a circuit diagram showing an example of the configuration of the voltage conversion circuit 6. As shown in FIG. 4, the voltage conversion circuit 6 includes a switching circuit 6a, two capacitors C1, C2, and three switching elements SWa, SWb, SWc. The switching circuit 6a includes two diodes D1 and D2 and two switching elements SW1 and SW2. Each of switching elements SW1, SW2 and switching elements SWa, SWb, SWc is, for example, a bipolar transistor. Each of switching elements SW1, SW2 and switching elements SWa, SWb, SWc may be another element having a switching function such as a field effect transistor.

  Switching element SW1 is connected between positive-side power supply line L1 and node N1. Switching element SW2 is connected between negative-side power supply line L2 and node N1. The anode A of the diode D1 is connected to the positive power supply line L1, and the cathode K of the diode D1 is connected to the node N2. The anode A of the diode D2 is connected to the node N2, and the cathode K of the diode D2 is connected to the node N3.

  Capacitor C1 is connected between nodes N1 and N2. Capacitor C2 is connected between node N3 and negative power supply line L2. The switching element SWa is connected between the node N3 and the gate G of the thyristor Ta in FIG. Switching element SWb is connected between node N3 and gate G of thyristor Tb in FIG. The switching element SWc is connected between the node N3 and the gate G of the thyristor Tc in FIG.

  In the voltage conversion circuit 6, a plurality of resistors are actually provided to operate the switching elements SW1 and SW2 and protect each element, but the resistance is not shown in FIG. Further, each of the capacitors C1 and C2 may be constituted by a plurality of capacitors.

  On / off of the switching elements SWa to SWc, SW1, and SW2 is controlled by the control unit 5. Specifically, the control unit 5 provides control signals SCa, SCb, SCc, SC1, and SC2 having pulses to the switching elements SWa, SWb, SWc, SW1, and SW2, respectively. Switching elements SWa to SWc, SW1, and SW2 are turned on in response to pulses of control signals SCa to SCc, SC1, and SC2, respectively.

  FIG. 5 is a timing chart for explaining an example of the operation of the voltage conversion circuit 6 of FIG. 5A to 5E show control signals SCa to SCc, SC1 and SC2, respectively, and FIG. 5F shows a change in voltage charged in the capacitor C2. As shown in FIGS. 5A to 5C, the control signal SCa rises to the “H” level at time t2a and falls to the “L” level after a certain time. The control signal SCb rises to “H” level at time t2b after time t2a, and falls to “L” level after a predetermined time. The control signal SCc rises to “H” level at time t2c after time t2b, and falls to “L” level after a predetermined time. Similar operations are repeated.

  The time from when the control signal SCa rises to the “H” level until the control signal SCb rises to the “H” level is called a period Tab. The time from when the control signal SCb rises to the “H” level until the control signal SCc rises to the “H” level is referred to as a period Tbc. The time from when the control signal SCc rises to the “H” level until the control signal SCa rises to the “H” level is called a period Tca. In this case, the period T is the sum of the period Tab, the period Tbc, and the period Tca. In the example of FIG. 5, the period Tab, the period Tbc, and the period Tca are substantially equal to each other and are approximately 1/3 of the period T.

  As shown in FIGS. 5D and 5E, the control signal SC1 changes between the “H” level and the “L” level in the cycle T1. The control signal SC2 changes to “H” level and “L” level in a cycle T2. When the control signal SC1 rises to the “H” level, the control signal SC2 falls to the “L” level, and when the control signal SC1 falls to the “L” level, the control signal SC2 falls to the “H” level. That is, when the switching element SW1 in FIG. 4 is turned on, the switching element SW2 is turned off, and when the switching element SW1 is turned off, the switching element SW2 is turned on.

  In the example of FIG. 5, the period T1 and the period T2 are equal to each other, and are sufficiently smaller than the periods Tab, Tbc, Tca when the rotational speed of the engine 30 of FIG. 1 is maximum.

  FIG. 6 is a circuit diagram for explaining the operation of the voltage conversion circuit 6. FIGS. 6A and 6B show the battery 3 of FIG. 2 in addition to the voltage conversion circuit 6. As shown in FIG. 6A, a state in which the switching element SW1 is turned off and the switching element SW2 is turned on is referred to as a first connection state. As shown in FIG. 6B, a state in which the switching element SW1 is turned on and the switching element SW2 is turned off is referred to as a second connection state.

  As shown in FIG. 6A, in the first connection state, the diode D2 and the capacitor C2 are connected in series. A series circuit including a diode D2 and a capacitor C2 is connected in parallel to the capacitor C1. A parallel circuit including a diode D2 and capacitors C1 and C2 is connected in series to the battery 3 via the diode D1. Thereby, the capacitors C1 and C2 are connected to the battery 3 in parallel.

  In this case, the current from the positive electrode of the battery 3 flows to the capacitor C1 via the diode D1, and also flows to the capacitor C2 via the diodes D1 and D2. As a result, the capacitors C1 and C2 are charged with the voltage of the battery 3.

  As shown in FIG. 6B, in the second connection state, the diode D1 and the capacitor C1 are connected in parallel. A parallel circuit including a diode D1 and a capacitor C1 is connected to the battery 3 in series. A diode D2 and a capacitor C2 are connected in series to a parallel circuit including the diode D1 and the capacitor C1. Thereby, the capacitors C1 and C2 are connected to the battery 3 in series.

  In this case, the current from the battery 3 flows to the capacitor C2 via the diodes D1 and D2, and the current from the capacitor C1 charged by the battery 3 in the first connection state flows to the capacitor C2 via the diode D2. As a result, the capacitor C2 is charged with a voltage obtained by adding the voltage of the battery 3 and the voltage across the capacitor C1. As a result, the capacitor C2 is charged with a voltage higher than the voltage of the battery 3.

  In the first and second connection states, since the diode D2 is connected in series with the capacitor C2, the capacitor C2 is not discharged until one of the switching elements SWa to SWc is turned on. Therefore, as shown in FIGS. 5D to 5F, by controlling on and off of the switching elements SW1 and SW2 so that the first connection state and the second connection state are alternately repeated, The voltage of the capacitor C2 can be increased stepwise from the voltage of the battery 3.

  When the switching element SWa is turned on for a certain time, the voltage charged in the capacitor C2 is applied to the gate G of the thyristor Ta in FIG. 2 as a pulse of the trigger signal TRa. Thereby, the thyristor Ta is turned on. When the switching element SWb is turned on for a certain period of time, the voltage charged in the capacitor C2 is applied as a pulse of the trigger signal TRb to the gate G of the thyristor Tb in FIG. Thereby, the thyristor Tb is turned on. Further, when the switching element SWc is turned on for a certain time, the voltage charged in the capacitor C2 is given as a pulse of the trigger signal TRc to the gate G of the thyristor Tc in FIG. Thereby, the thyristor Tc is turned on.

  As described above, the periods T1 and T2 are smaller than the period Tca when the rotational speed of the engine 30 in FIG. 1 is maximum. In this case, as shown in FIGS. 5A and 5F, the capacitor C2 is charged to a voltage higher than the voltage of the battery 3 by a predetermined voltage before the control signal SCa rises to the “H” level at the time point t2a. be able to. Thereby, the thyristor Ta can be turned on at the time point t2a.

  After the thyristor Ta is turned on at the time t2a, the voltage charged in the capacitor C2 decreases due to the discharge. Even in this case, since the periods T1 and T2 are smaller than the period Tab when the rotation speed of the engine 30 is maximum, as shown in FIGS. 5B and 5F, the control signal SCb becomes “H” at the time point t2b. The capacitor C2 can be charged to a voltage higher than the voltage of the battery 3 by a predetermined voltage or more before rising to the “level”. Thereby, the thyristor Tb can be turned on at the time point t2b.

  Similarly, after the thyristor Tb is turned on at the time point t2b, the voltage charged in the capacitor C2 decreases due to discharging. Even in this case, since the periods T1 and T2 are smaller than the period Tbc when the rotational speed of the engine 30 is maximum, as shown in FIGS. 5C and 5F, the control signal SCc becomes “H” at time t2c. The capacitor C2 can be charged to a voltage higher than the voltage of the battery 3 by a predetermined voltage or more before rising to the “level”. Thereby, the thyristor Tc can be turned on at the time point t2c.

(4) Effect In the power generation control device 2 according to the present embodiment, a trigger signal having a voltage higher than the voltage of the battery 3 by a predetermined value by the inexpensive capacitors C1 and C2 without providing an expensive switching regulator integrated circuit. TRa to TRc can be obtained. Therefore, the costs of the power generation control device 2 and the motorcycle 100 can be reduced.

  Further, during the period T, the capacitor C2 is alternately charged a plurality of times with a voltage of the battery 3 and a voltage higher than the voltage of the battery 3. Thereby, even when the voltage of the capacitor C1 added to the voltage of the battery 3 in the second connection state is small, the capacitor C2 is set to a voltage higher than the voltage of the battery 3 by a predetermined value or more in a period sufficiently shorter than the period T. It can be charged. As a result, the control unit 5 can reliably control the phase angle of the rectifier circuit 7.

  Further, even when the voltage of the battery 3 fluctuates due to the rotation speed of the engine 30 and the phase angle control of the rectifier circuit 7, the battery 3 is switched by switching the rectifier circuit 7 between the first connection state and the second connection state. Voltages higher than a predetermined value by a predetermined value or more are applied to the thyristors Ta to Tc as trigger signals TRa to TRc, respectively. Therefore, the phase angle control of the rectifier circuit 7 can be reliably performed regardless of the fluctuation of the voltage of the battery 3.

(5) Other Embodiments (5-1) In the above embodiment, the rectifier circuit 7 of the power generation control device 2 converts the three-phase alternating current generated by the three-phase alternating current generator (magnet generator 1) into a direct current. However, the present invention is not limited to this. The rectifier circuit 7 of the power generation control device 2 may be configured to convert a single-phase alternating current generated by the single-phase alternating current generator into a direct current.

  FIG. 7 is a block diagram showing a configuration of the power generation control device 2 according to another embodiment. As shown in FIG. 7, the rectifier circuit 7 of the power generation control device 2 according to another embodiment is a bridge circuit including two thyristors Ta and Tb and two diodes Da and Db. The anodes A of the thyristors Ta and Tb are connected to the nodes Na and Nb, respectively, and the cathodes K of the thyristors Ta and Tb are connected to the positive power supply line L1. The cathodes K of the diodes Da and Db are connected to the nodes Na and Nb, respectively, and the anodes A of the diodes Da and Db are connected to the negative power supply line L2.

  The voltage conversion circuit 6 in FIG. 7 has the same configuration as the voltage conversion circuit 6 in FIG. 4 except that the switching element SWc in FIG. 4 is not included. 7 has the same function as the control unit 5 of FIG. 4 except that the control signal SCc of FIG. 4 is not supplied to the switching element SWc.

  Single-phase AC generator 8 is connected between nodes Na and Nb. Thereby, the rectifier circuit 7 converts the alternating current generated by the single-phase alternating current generator 8 into a direct current. The control unit 5 controls the phase angle of the thyristors Ta and Tb by giving a trigger signal to the gates G of the thyristors Ta and Tb of the rectifier circuit 7 through the voltage conversion circuit 6. By controlling the timing of the trigger signal, the current output from the rectifier circuit 7 is controlled.

  (5-2) In the above embodiment, the switching circuit 6a of the voltage conversion circuit 6 of FIG. 4 includes the two switching elements SW1 and SW2, but is not limited thereto. The switching circuit 6a may include one switch instead of the two switching elements SW1 and SW2.

  FIG. 8 is a circuit diagram showing another example of the configuration of the voltage conversion circuit 6. As shown in FIG. 8, the voltage conversion circuit 6 includes a switch SW0 instead of the switching elements SW1 and SW2 of FIG. The switch SW0 is constituted by a plurality of transistors, for example. The switch SW0 has three terminals CP0, CP1, and CP2. Terminal CP0 is connected to node N1. Terminal CP 1 is connected to the negative electrode of battery 3. Terminal CP2 is connected to the positive electrode of battery 3.

  The switch SW0 is switched by the control unit 5 so that the terminal CP1 or the terminal CP2 is connected to the terminal CP0. When the terminals CP0 and CP1 are connected, the voltage conversion circuit 6 is in the first connection state, and when the terminals CP0 and CP2 are connected, the voltage conversion circuit 6 is in the second connection state. .

  (5-3) In the embodiment described above, the motorcycle 100 has been described as an example of a transport device, but the present invention is not limited to this. The present invention can also be applied to various transportation devices such as a four-wheeled vehicle, a three-wheeled vehicle, an electric bicycle, a planing boat, a watercraft, an electric wheelchair or an aircraft.

(6) Correspondence between each component of claim and each part of embodiment The following describes an example of a correspondence between each component of the claim and each part of the embodiment. It is not limited.

  The battery 3 is an example of a battery, the magneto generator 1 or the single-phase AC generator 8 is an example of an AC generator, the power generation control device 2 is an example of a power generation control device, and the thyristors Ta to Tc are switching elements or thyristors. The rectifier circuit 7 is an example of a rectifier circuit. Capacitors C1 and C2 are examples of first and second capacitors, voltage conversion circuit 6 is an example of a voltage conversion circuit, control unit 5 is an example of a control unit, and engine 30 is an example of an engine. The switching circuit 6a is an example of a switching circuit.

  The switching elements SW1 and SW2 or the switch SW0 are examples of one or a plurality of switches, the switching elements SW1 and SW2 are examples of the first and second switches, respectively, and the diodes D1 and D2 are the first and second switches, respectively. It is an example of a unidirectional conducting element. Nodes N1 to N3 are examples of first to third nodes, diodes Da to Dc are examples of first to third rectifier elements, and thyristors Ta to Tc are first to third switching elements, respectively. It is an example of an element, the magneto generator 1 is an example of a three-phase AC generator, and the single-phase AC generator 8 is an example of a single-phase AC generator.

  The part of the motorcycle 100 excluding the magneto generator 1, the power generation control device 2, the engine 30 and the rear wheel 38 is an example of a main body, the engine 30 is an example of an engine, and the rear wheel 38 is an example of a drive unit. The motorcycle 100 is an example of a transportation device.

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

  The present invention can be widely applied to power generation control devices in various transport equipment such as motorcycles, motor tricycles, motor four-wheeled vehicles, and ships.

DESCRIPTION OF SYMBOLS 1 Magneto generator 1a-1c Stator coil 2 Electric power generation control apparatus 3 Battery 4a Headlight 4b Taillight 5 Control part 6 Voltage conversion circuit 6a Switching circuit 7 Rectifier circuit 8 Single phase alternating current generator 30 Engine 31 Main body frame 32 Head pipe 33 Handle 36 Main body seat 37 Rear arm 38 Rear wheel 39 Rear wheel driven sprocket 40 Chain 100 Motorcycle C1, C2 Capacitor CK Basic clock signal CP0 to CP2 Terminal D1, D2, Da to Dc Diode L1 Positive side power line L2 Negative side power line N1 N3, Na to Nc Nodes SCa to SCc, SC1, SC2 Control signal SW0 Switch SW1, SW2, SWa to SWc Switching element T, T1, T2, Tab, Tbc, Tca, Tck Period Ta Tc Thyristor Tmin Minimum period TR Trigger signal

Claims (10)

A power generation control device connected to a battery and an AC generator,
Including a switching element that is turned on when a trigger signal having a voltage higher than a voltage of the battery by a predetermined value or more is applied, and the alternating current output from the alternating current generator is turned into a direct current during the conduction period of the switching element. A rectifier circuit configured to convert;
A first connection state including first and second capacitors, wherein the first and second capacitors are connected in parallel with each other and the first and second capacitors are charged with the voltage of the battery; A first capacitor is connected in series with the battery and the second capacitor is charged with a voltage higher than the voltage of the battery by the battery and the first capacitor connected in series. A voltage conversion circuit configured to be switchable to a state;
By alternately switching the voltage conversion circuit between the first connection state and the second connection state, the second capacitor is charged to a voltage higher than the voltage of the battery by a predetermined value or more, and the battery A control unit configured to control the phase angle of the rectifier circuit by applying, as the trigger signal, a voltage higher than the voltage by the predetermined value from the second capacitor to the switching element. apparatus. The control unit switches the voltage conversion circuit alternately between the first connection state and the second connection state a plurality of times during one cycle of phase angle control of the rectifier circuit. The power generation control device according to claim 1, configured to charge a capacitor to a voltage higher than the voltage of the battery by the predetermined value or more. The alternator is driven by an engine,
The power generation control device according to claim 1, wherein the rectifier circuit is connected to the battery so as to give a converted direct current to the battery. The power generation control device according to claim 1, wherein the switching element includes a thyristor. The voltage conversion circuit further includes a switching circuit configured to switch an electrical connection between the battery, the first capacitor, and the second capacitor;
5. The control unit according to claim 1, wherein the control unit is configured to selectively switch the voltage conversion circuit to the first and second connection states by controlling the switching circuit. 6. Power generation control device. The switching circuit connects the first and second capacitors in parallel to each other in the first connection state, and connects the first capacitor to the battery in series in the second connection state. The power generation control device according to claim 5, further comprising: The one or more switches of the switching circuit are:
A first switch connected between a first node and a positive electrode of the battery;
A second switch connected between the first node and the negative electrode of the battery;
The switching circuit is
A first unidirectional conducting element connected between the positive electrode of the battery and the second node so as to pass a current from the positive electrode of the battery to a second node;
A second unidirectional conducting element connected between the second node and the third node so that a current flows from the second node to the third node;
The first capacitor is connected between the first node and the second node;
The second capacitor is connected between the third node and a negative electrode of the battery;
The controller is
Switching the voltage conversion circuit to the first connection state by opening the first switch and closing the second switch;
The power generation control device according to claim 6, wherein the voltage conversion circuit is switched to the second connection state by closing the first switch and opening the second switch. The alternator includes a three-phase alternator,
The rectifier circuit further includes first, second and third rectifier elements,
The switching element includes first, second and third switching elements,
The first, second, and third switching elements and the first, second, and third rectifying elements are bridge-connected so as to convert an alternating current output from the three-phase alternating current generator into a direct current. The power generation control device according to any one of claims 1 to 7. The alternator includes a single-phase alternator,
The rectifier circuit further includes first and second rectifier elements,
The switching element includes first and second switching elements,
The first and second switching elements and the first and second rectifying elements are bridge-connected so as to convert an alternating current output by the single-phase alternating current generator into a direct current. The power generation control device according to claim 7. 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;
Transportation equipment provided with the power generation control device according to any one of claims 1 to 9, which controls an output current of the AC generator driven by the engine.

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