JP2002136195A - Power generation controller for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable reliable recovery from the regulation conditions in the power generation controller for vehicle which rectifies the output current of a multi-phase AC generator with a rectifying circuit and more regulates the output current to the prescribed voltage with a regulator. SOLUTION: When a battery voltage VB reaches a regulated voltage Vreg at a time t1, each phase is regulated. Thereafter, the phase W is recovered at a time t2 and a phase V is recovered at a time t3. Thereafter, if a current IW of a phase W crosses the value zero at a time t4, reference is made to a current IU of phase U which is preceding a phase W and is not yet recovered, and if this current IU is positive, the phase U is recovered.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicular power generation control device for rectifying the output current of a polyphase alternator and controlling the output current to a predetermined voltage by a regulator. In particular, each phase reliably returns from a regulated state. The present invention relates to a power generation control device for a vehicle.

[0002]

2. Description of the Related Art There is known power generation control in which an output current of a polyphase AC generator is rectified by a rectifier circuit and controlled to a predetermined voltage by a regulator. In such power generation control, when the output voltage of the rectifier circuit exceeds a predetermined regulated voltage, the regulator controls the rectifier circuit to ground all the phases, thereby setting a so-called regulated state. The return from the regulated state is performed for each phase, and each phase is released from the ground state at the timing when the phase current crosses zero.

On the other hand, as an AC motor or a generator,
2. Description of the Related Art An everting type permanent magnet generator in which a cylindrical rotor yoke rotates on the outer periphery of a stator is known. Further, in such a permanent magnet type generator, a permanent magnet type generator having an auxiliary pole portion formed between adjacent permanent magnets is disclosed in
-275476.

[0004]

In the above-described permanent magnet type generator having the auxiliary pole structure, if the magnetic field balance is poor or if the generator is employed as an AC generator for a vehicle, each phase is grounded and regulated. When this occurs, a polarity separation of the current occurs. Therefore, for example, in a three-phase AC generator, FIG.
As shown in FIG. 1, two of the three phases (here, V,
It is assumed that even if the W phase) crosses zero and can return from the regulated state, it cannot return from the regulated state because the remaining one phase (here, U phase) cannot cross zero.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems of the prior art, and to provide a vehicular power generation control device for rectifying an output current of a polyphase AC generator and controlling the output current to a predetermined voltage by a regulator. The purpose is to enable reliable return.

[0006]

In order to achieve the above-mentioned object, the present invention provides a rectifier circuit for rectifying an alternating current output from each phase of a multi-phase AC generator, and a rectifier circuit having a predetermined output voltage. A power generation control device for a vehicle, comprising: a regulator for setting all phases to a regulated state when the regulated voltage is reached. In the regulated state, for each phase, zero-cross detecting means for detecting that the alternating current has crossed zero. First return means for returning the zero-crossed phase from the regulated state; determining means for determining the current direction of the phase preceding the phase when any of the phases has zero-crossed; And a second return means for returning the previous phase from the regulated state when the current direction of the phase is determined to be the positive direction.

According to the above-described feature, a phase in which the phase current does not zero-cross in the regulated state can return from the regulated state if its own phase current is positive when the subsequent phase crosses zero. It is possible to return from the regulated state even if the current does not cross zero.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings. FIG. 1 is an overall side view of a scooter type motorcycle to which a vehicle power generation control device of the present invention is applied.

The front part of the vehicle body and the rear part of the vehicle body are connected via a low floor part 4, and the body frame constituting the skeleton of the vehicle body is generally composed of a down tube 6 and a main pipe 7. A fuel tank and a storage box (both not shown) are supported by a main pipe 7, and a seat 8 is disposed above the main tank 7.

At the front of the vehicle body, a handle 11 is provided above and supported by the steering head 5, a front fork 12 extends below, and a front wheel FW is supported at its lower end. The upper part of the handle 11 is covered with a handle cover 13 also serving as an instrument panel. A bracket 15 projects from the lower end of the rising portion of the main pipe 7, and a hanger bracket 18 of the swing unit 2 is swingably connected to and supported by the bracket 15 via a link member 16.

The swing unit 2 is mounted with a single-cylinder two-stroke internal combustion engine E at the front thereof. A belt-type continuously variable transmission 10 is configured from the internal combustion engine E to the rear, and a rear wheel RW is supported by a reduction mechanism 9 provided at a rear portion thereof via a centrifugal clutch. This reduction mechanism 9
The rear cushion 3 is interposed between the upper end of the main pipe 7 and the upper bent portion of the main pipe 7. A carburetor 17 connected to an intake pipe 19 extending from the internal combustion engine E and an air cleaner 14 connected to the carburetor 17 are disposed at the front of the swing unit 2.

FIG. 2 is a cross-sectional view of the swing unit 2 taken along the crankshaft 201. The same reference numerals as those described above denote the same or equivalent parts.

The swing unit 2 is covered by a crankcase 202 formed by combining left and right crankcases 202L and 202R, and the crankshaft 201 is rotatably supported by bearings 208 and 209 fixed to the crankcase 202R. Have been. On the crankshaft 201,
A connecting rod (not shown) is connected via a crank pin 213.

The left crankcase 202L also serves as a belt-type continuously variable transmission chamber case.
Belt drive pulley 2
10 is provided rotatably. Belt drive pulley 2
10 includes a fixed pulley half 210L and a movable pulley half 210R, and the fixed pulley half 210L is fixed to the left end of the crankshaft 201 via a boss 211,
On the right side, the movable pulley half 210R is connected to the crankshaft 20.
1 and can approach / separate from the fixed-side pulley half 210L. Both pulley halves 210L,
A V-belt 212 is wound around 210R.

A cam plate 215 is fixed to the crankshaft 201 on the right side of the movable pulley half 210R.
A slide piece 215a provided on the outer peripheral end is slidably engaged with a cam plate sliding boss 210Ra formed in the axial direction at the outer peripheral end of the movable pulley half 210R. Cam plate 215 of movable pulley half 210R
Has a tapered surface inclined toward the cam plate 215 toward the outer periphery, and the tapered surface and the movable pulley half 210R
A dry weight pole 216 is accommodated in a space between the two.

When the rotation speed of the crankshaft 201 increases, the dry weight ball 2 that is located between the movable pulley half 210R and the cam plate 215 and rotates together is provided.
16 moves in the centrifugal direction due to the centrifugal force, and the movable pulley half 210R is pressed by the dry weight ball 216 and moves leftward to approach the fixed pulley half 210L. As a result, the V-belt 212 sandwiched between the two pulley halves 210L and 210R moves in the centrifugal direction, and its winding diameter increases.

A belt driving pulley 21 is provided at the rear of the vehicle.
A driven pulley (not shown) corresponding to 0 is provided, and the V-belt 212 is wound around the driven pulley. The power of the internal combustion engine E is automatically adjusted by this belt transmission mechanism and transmitted to the centrifugal clutch, and the rear wheel RW is driven via the speed reduction mechanism 9 and the like.

A starter / generator 1 combining a starter motor and an AC generator is provided in the right crankcase 202R. In the starter / generator 1, the outer rotor 60 is fixed to a tapered end of the crankshaft 201 by a screw 253. The inner stator 50 disposed inside the outer rotor 60 is supported by being screwed to the crankcase 202 by bolts 279. The configuration of the starter / generator 1 will be described later in detail with reference to FIGS.

The fan 280 has a central conical portion 280a.
Is fixed to the outer rotor 60 by bolts 246, and the fan 280 is covered by a fan cover 281 via a radiator 282.

On the crankshaft 201, a sprocket 2 is provided between the starter / generator 1 and the bearing 209.
A chain for driving a camshaft (not shown) from the crankshaft 201 is wound around the sprocket 231. The sprocket 231 is formed integrally with a gear 232 for transmitting power to a pump for circulating lubricating oil.

FIGS. 3 and 4 show the rotation shaft (crankshaft 20) of the starter / generator 1 (permanent magnet rotary motor).
FIGS. 5 and 6 are a plan view of a rotor yoke and a partially enlarged view of the rotor yoke, and the same reference numerals as those described above denote the same or equivalent parts. Represents.

The starter / generator 1 of the present embodiment
Is composed of a stator 50 and an outer rotor 60 rotating around the outer periphery of the stator 50 as shown in FIGS. 3 and 4. The outer rotor 60 has a ring shape as shown in FIGS. The rotor yoke 61 is formed by laminating silicon steel plates (thin plates) substantially in a cylindrical shape, and alternately in a plurality of openings 611 provided in the circumferential direction of the rotor yoke 61 as shown in FIGS. As shown in FIGS. 3 and 4, the rotor yoke 61 is connected to the crankshaft 201 by inserting the inserted N-pole permanent magnet 62N and S-pole permanent magnet 62S.
And a cup-shaped rotor case 63 connected to the rotor case 63.

The rotor case 63 has a claw portion 63a at a circumferential end thereof, and the claw portion 63a is bent inward so that the rotor yoke 61 of the laminated structure is held in the axial direction. Opening 61
Each of the permanent magnets 62 (62N, 62S) inserted into the rotor 1 is held at a predetermined position in the rotor yoke 61.

The stator 50 is made of a silicon steel plate (thin plate)
And includes a stator core 51 and stator salient poles 52 as shown in FIG. A stator winding 53 is wound around each of the stator salient poles 52 in a single-pole concentrated manner.
The main surface of the stator 50 is covered with a protective cover 71.

As shown in FIGS. 5 and 6, the rotor yoke 61 has twelve openings 611 into which the permanent magnets 62 are inserted in the axial direction at intervals of 30 degrees in the circumferential direction. The space between the adjacent openings 611 functions as the auxiliary pole 613.

As shown in FIG. 7, a permanent drum 62 having a substantially drum-shaped cross section is inserted into each of the openings 611. Here, in the present embodiment, the shape of the opening 611 and the cross-sectional shape of the permanent magnet 62 are not the same, and when the permanent magnet 62 is inserted into the opening 611, the circumferential direction of each permanent magnet 62 is First gap 612 on both sides along
Are formed, and a second gap 614 is formed on both ends of each permanent magnet 62 on the stator side.

FIG. 8 is a block diagram of a control system of the starter / generator 1, and the same reference numerals as those described above denote the same or equivalent parts.

The ECU performs full-wave rectification of the three-phase AC generated by the generator function of the starter / generator 1.
The phase full-wave rectifier 300 and the output of the full-wave rectifier 300 are connected to a predetermined regulated voltage (regulator operating voltage: for example,
14.5 V).

The ECU is connected to a rotor angle sensor 29, an ignition coil 21, a throttle sensor 23, a fuel sensor 24, a seat switch 25, an idle switch 26, a cooling water temperature sensor 27, and an ignition pulser 30. Is input to Ignition coil 21
The ignition plug 22 is connected to the secondary side of the.

Further, the ECU includes a starter relay 3
4. Starter switch 35, stop switch 36,3
7, standby indicator 38, fuel indicator 39, speed sensor 40, motorcycle star 41,
And a headlight 42 are connected. Headlight 4
2 is provided with a dimmer switch 43.

A current is supplied from a battery 46 to each of the above-described units via a main fuse 44 and a main switch 45. The battery 46 is connected to the starter relay 3
4 is connected directly to the ECU, while the EC is connected only through the main fuse 44 without passing through the main switch 45.
It has a circuit connected to U.

FIG. 9 is a diagram showing a configuration of a main part related to power generation control of the ECU. The three-phase full-wave rectifier 300 includes:
This is a bridge circuit configured by connecting three sets of two FETs connected in series in parallel. The regulator 100 includes a low-potential side FET (U-FET, V-FET, W-FET) of each phase.
FET) is controlled to limit the battery voltage VB to a predetermined voltage by controlling the gate voltage.

FIG. 10 is a block diagram of a main part of the regulator 100. A comparator 112 compares a predetermined regulated voltage Vreg with a battery VB. The one-shot multivibrator 101 generates a Q output based on an output change of the comparator 112.
The OR gate 105 calculates the logical sum of the output of the comparator 112 and the Q output by a U-phase F / F (flip-flop).
109, output to the set terminal S of the V-phase F / F110 and the W-phase F / F111.

The comparators 113, 114, and 115 respectively provide the U, V, and W phase voltages VU of the three-phase AC generator 1.
, VV, VW and a predetermined voltage (-12.5 mV in this embodiment) corresponding to zero cross. Inverters 116, 117 and 118 invert the outputs of the comparators 113, 114 and 115, respectively. The one-shot multivibrators 102, 103, and 104 generate a Q output based on output changes of the comparators 113, 114, and 115, respectively.

The U-phase AND gate 119 outputs a logical product of the output of the U-phase inverter 116, the Q output of the W-phase one-shot multivibrator 104, and the Q-bar output of the W-phase F / F 111. The U-phase OR gate 106 outputs the logical sum of the output of the U-phase AND gate 119 and the Q output of the one-shot multivibrator 102 to the U-phase F / F1.
09 to the reset terminal R.

The V-phase AND gate 120 outputs a logical product of the output of the V-phase inverter 117, the Q output of the U-phase one-shot multivibrator 102, and the Q-bar output of the U-phase F / F 109. The V-phase OR gate 107
The logical sum of the output of the V-phase AND gate 120 and the Q output of the one-shot multivibrator 103 is converted to the V-phase F / F1
10 to the reset terminal R.

The W-phase AND gate 121 outputs a logical product of the output of the W-phase inverter 118, the Q output of the V-phase one-shot multivibrator 103, and the Q-bar output of the V-phase F / F 110. W-phase OR gate 108 outputs the logical sum of the output of W-phase AND gate 121 and the Q output of one-shot multivibrator 104 to W-phase F / F 111
To the reset terminal R.

Next, the regulation operation by the control unit 100 will be described with reference to the waveform diagram of FIG. 11 and the input / output correspondence table of FIG.

At time t1 in FIG. 11, when the battery voltage VB reaches the regulated voltage Vreg, the output of the comparator 112 in FIG. 10 changes from the "L" level to the "H" level, and the OR gate 105 changes to the "H" level. Is output, the F / Fs 109, 110, and 111 of each phase are set. As a result, the U-FET, V-
As shown in the input / output correspondence table of FIG. 12, the FETs and the W-FETs are all turned on and each phase is grounded, that is, in a regulated state, so that the output voltage of the full-wave rectifier 300 is reduced. descend.

Thereafter, at time t2, the current IW of the W phase
Is zero-crossed, the output of W-phase comparator 115 changes to “H” level, so that W-phase multivibrator 1
04 generates one pulse. As a result, the W-phase F / F11
1 is reset and its Q output turns to "L" level, so that the W-FET of the full-wave rectifier 300 is turned off. That is, the W phase returns from the regulated state.

At this time, if the voltage VU of the U-phase which is the phase before the W-phase is lower than -12.5 mV, that is, if the current IU of the U-phase is negative, the output of the U-phase comparator 113 becomes "L". Since the level and the output of the inverter 116 are at "L" level, the U-phase regulated state is maintained.

Thereafter, at time t3, the V-phase current IV
Is zero-crossed, the output of the V-phase comparator 114 changes to “H” level, so that the V-phase multivibrator 1
03 generates one pulse. As a result, the V-phase F / F11
Since 0 is reset and its Q output turns to “L” level, the V-FET of the full-wave rectifier 300 is turned off. That is, the V phase also returns from the regulated state.

Thereafter, at time t4, the current IW of the W phase
Again crosses zero, the output of the W-phase inverter 118 changes to the “H” level, so that the multivibrator 1
04 generates one pulse, which is a U-phase AND gate 11
9 is also input. Further, at this point, the W-phase F / F1
11 is at the “H” level, and this is the U-phase A
Input to ND gate 119. Further, at time t4, the U-phase voltage VU is higher than -12.5 mV, that is, since the U-phase current IU is positive, the U-phase comparator 11
The output of the inverter 3 changes to "L" level, and the output of the inverter 116 changes to "H" level.

As a result, since all three inputs of the U-phase AND gate 119 are at "H" level, their outputs are at "H" level. Further, since the U-phase F / F 109 is reset and the Q output turns to “L” level, the full-wave rectifier 30
The U-FET at 0 is turned off. That is, the U phase also returns from the regulated state.

As described above, according to this embodiment, when two of the three phases return from the regulated state, the remaining one phase has its own phase current when the subsequent phase crosses zero. If the value is positive, it is possible to return from the regulated state, so that the last phase cannot be returned from the regulated state forever.

In the embodiment described above, the present invention is applied to
Although the description has been given by taking the phase AC generator as an example, the present invention is not limited to this, and can be similarly applied to an AC generator having four or more phases.

In the above-described embodiment, the description has been made assuming that the zero cross of the phase current is detected only in one direction. However, if another set of the configuration shown in FIG. 10 is provided, the zero cross can be detected in both directions. .

[0048]

According to the present invention, when two of the three phases return from the regulated state, the remaining phases are regulated if the phase current is positive when the subsequent phase crosses zero. You can return from the state. Therefore, even if the electric machine having the auxiliary pole structure is adopted as the generator, the last phase will not be able to return from the regulated state forever.

[Brief description of the drawings]

FIG. 1 is an overall side view of a scooter type motorcycle to which the present invention is applied.

FIG. 2 is a sectional view taken along a crankshaft of the swing unit of FIG. 1;

FIG. 3 is a partially broken plan view of a starter / generator (permanent magnet type rotary electric motor) in a plane perpendicular to a rotation axis (crankshaft).

FIG. 4 is a side sectional view of FIG. 3;

FIG. 5 is a plan view of a rotor yoke.

FIG. 6 is a side view of a rotor yoke.

FIG. 7 is a partially enlarged view of a rotor yoke.

FIG. 8 is a block diagram of a control system of a starter / generator.

FIG. 9 is a block diagram showing a configuration of a main part of the ECU of FIG. 8;

FIG. 10 is a block diagram showing a configuration of the regulator of FIG. 8;

FIG. 11 is a waveform chart showing the operation of the regulator.

FIG. 12 is a diagram showing a correspondence between input and output of a regulator.

[Explanation of symbols]

1: starter / generator, 50: stator, 51:
Stator core, 52: stator salient pole, 53: stator winding, 60: outer rotor, 61: rotor yoke, 62
(62N, 62S) permanent magnet ..., 63 ... rotor case,
71: protective cover, 201: crankshaft, 611: opening, 612: first gap, 613: auxiliary pole, 614: second
Void

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Kuniaki Ikui 4-1-1 Chuo, Wako-shi, Saitama F-term in Honda R & D Co., Ltd. (Reference) 5H002 AA01 AB07 AC04 AC08 5H590 AA01 CA23 CB10 CC02 CC18 CC24 CD01 CE05 EA13 FB01 FC12 GA02 HA02 JB03 JB06 5H621 BB07 GA01 GA17 5H622 AA03 CA02 CA07 CA10 CB03 PP01 PP10 PP17 PP19

Claims (2)

[Claims] 1. A rectifier circuit for rectifying an alternating current output from each phase of a polyphase AC generator, and a regulator for setting all phases to a regulated state when an output voltage of the rectifier circuit reaches a predetermined regulated voltage. A power generation control device for a vehicle, comprising: a zero cross detection means for detecting that the alternating current has crossed zero for each phase in a regulated state; and a first return means for returning the zero crossed phase from the regulated state. A determining means for determining the current direction of the phase preceding the phase when any of the phases crosses zero; and determining that the current direction of the preceding phase is the positive direction by the determining means. A second return means for returning the phase from the regulated state. 2. The multi-phase alternator includes a stator and its windings, and a substantially cylindrical rotor yoke that rotates a periphery of the stator by arranging a plurality of permanent magnets along a circumferential direction, The said rotor yoke has an auxiliary pole part between each permanent magnet adjacent to each other, The 1st characterized by the above-mentioned.
The power generation control device for a vehicle according to claim 1.