JPS6131000A - Integral starter generator - Google Patents

Abstract

PURPOSE:To obtain the prescribed torque characteristic by varying the phase angle of an armature current in response to the rotating speed. CONSTITUTION:When a key switch is operated at the starting position, a controller 12 controls to turn ON or OFF power transistors 14-19 in response to the position detection signal from a cranking angle detector 5 to control the flowing current of an armature winding 1. When the rotating speed of a starter generator 11 exceeds the prescribed value, the phase advanced amount corresponding to the rotating speed stored in the memory is read out to advance the phase of the armature current. Thus, the torque decrease due to the armature reaction can be prevented. When an engine is started and shifted to a generator mode, the power transistors 14-19 are turned OFF to control the field current of the field winding 2 so that the generated voltage becomes the set value.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to an integrated starter-generator device that integrates an engine starter and a generator.

[Background of the invention]

An integrated starter generator is an attempt to realize an automobile engine starter and a power supply generator, which were conventionally separate, in one rotating machine. Regarding such an integrated starter-jet resistor, Japanese Patent Application Laid-open No. 58
As disclosed in No. 79668, by detecting %<x current during starter operation and controlling the excitation current, the scooter is given compound winding or series winding characteristics to generate a small torque. However, since this is a control of only the excitation current, if the excitation current is determined during starter operation, both the rotation type and the torque are determined uniquely, and consideration is given to (1) the decrease in torque as the rotation increases. It wasn't. For this reason, there was a problem in that it was not always possible to cope with an increase in required torque.

An object of the present invention is to provide an integrated starter/jet/inverter device that allows the rotation speed and torque to be individually set within the set power during starter operation, and that allows sufficient torque to always be obtained.

[Summary of the invention]

The present invention focuses on the fact that the torque during starter operation is determined by the air gap magnetic flux, the armature current, and the phase angle of both. It is characterized in that the pressure is varied to obtain the required torque characteristics.

[Embodiments of the invention]

Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a vT plane view along the central axis of the crank 7 shaft of the integrated starter generator main body, showing the armature winding 1.11 m core 3 which is the starter, the field poles 4a and 4b which are the rotor, and the field magnet. It is composed of a winding 2, a non-extracting ring 120, a crank angle detector 5, a rear plate 7, a case 9, etc. This structure is a Schindel type three-phase alternating current generator (
(hereinafter abbreviated as ACG). 1t [The child core 3 is attached to the case 9 and the field winding 2 is fixed to the rear plate 7. The magnetic poles 4a and 4b are made of a ferromagnetic material, are combined as a pair of comb-shaped magnetic poles with a non-magnetic ring 120, and are fixed to a crankshaft 201 with bolts 200. The crank angle detector 5 has three diode pairs of a photodiode and a light emitting diode, and directs the rotation angle of the cutout plate 6. The positions of the three diode pairs of the crank angle detector 5 are adjusted at the time of attachment to the lever plate 7, and are set so that the starting torque is maximized. For example, when the field poles 4 are 28 poles, the cutout plate 6 has 28 poles.
Fourteen notches with a notch width of 12.8 degrees are provided at a pitch of 360 degrees/l 4 = 25.7 degrees.

FIG. 2 is an overall wiring diagram showing an embodiment of the device of the present invention, in which the starter body 11, the driver unit 10, the controller 12, the key switch 27, the charge/recharge indicator lamp 29, and the battery shown in FIG. It consists of 28. The driver unit 10 supplies an armature current synchronized with rotation to the armature winding 1 during starter operation 6
1 power transistors 14 to 19, a current detector 13 that detects the armature current, a power transistor 20 that drives the field winding 2, and 6 diodes 21 to 26 that perform full-wave rectification of the armature output during generator operation. It consists of In this overall wiring diagram, the controller 12 is a feature of the present invention, and its configuration is shown in FIG. This controller uses a signal from a microcomputer 30 that controls the entire operation, a phase control circuit 32 composed of a down counter and a normo-flop, a tarok circuit 47, and a crank angle detector 5 to produce an angle equivalent to 0.2°. A pseudo angle generation circuit 34 that generates an angle signal, a circuit 31 that switches the phase angle control of the armature current and converts it into a signal for driving the power transistor, and a power transistor 15 when an overcurrent signal is input from the overcurrent detector 37. ,17. a gate circuit 33 that leads l'l off and otherwise sends a gate signal to the power transistors 14 to 19 via a driver 35;
A photoelectric circuit 30 that integrates one-phase output of the armature to detect charging and discharging, a level conversion circuit 38, an A/D converter 39, and a driver 40 for the charging zone indicator lamp 29. It consists of a field control circuit 41 made up of a down counter and a slip-flop.

The operation of this controller is as follows.

When the rotational speed of the starter generator increases during starter operation, the phase angle of the t-Isogo current lags behind the air gap magnetic flux due to armature reaction, resulting in a decrease in rotational torque. To prevent this, the phase of the armature current can be advanced as follows. FIG. 4 is an explanatory diagram of the operation of the controller 12, in which the crank angle detector 517I is provided with three-phase diode pairs as described in FIG. PS3U/m
period is 25.7° (pitch of cutout plate 6), width 12.8
Outputs a pulse train equivalent to 28 poles (width of cutout plate). The phase of these pulse trains is determined by the relative positional relationship between the stator (armature) and the rotor (magnetic poles), and therefore also corresponds to the phase of the air gap magnetic flux.Therefore, this pulse train P S 1 ~The phase of the armature current may be controlled to advance relative to PS3.Therefore, the microcomputer 30 has a storage section storing the required advance amount corresponding to the rotation speed, and when the starter is operating and the rotation speed is When the number exceeds a predetermined value, the microcomputer 30 sets the phase control circuit 3 to a value commensurate with the amount of advance corresponding to the rotational speed at that time.
On the other hand, the pseudo angle generator outputs a pulse train Ask every 0 and 2 degrees, which is generated using the pulse train PS1 and the tarok from the clock circuit 47, but this output starts, for example, at the rising edge of the pulse train PS1. Time point T
10 (Fig. 44), and from this point onwards, pulses every 0.2 degrees are input to the down counter to decrease the counted value 'lk. Therefore, if the above required advance angle amount is 1 degree, for example, 1 degree n 0.2 degrees = 5, so 12.8 degrees 10.2 degrees = 64 minus 5, 59, is initialized in the down counter. Counting down every 0.2 degrees = 59 x 0.2 degrees
At 11.8 degrees, the counter becomes OVC. Therefore, at this point, if the 2-lip-flop of 32 yen in the phase control circuit is reset, its output will be at the falling edge of the phase advance pulse train PSID in Fig. 4.
TIID, which is the output PS of the crank angle detector 5
l's falling DT11! It has advanced 71 degrees. If we set the 59ft down counter again at time Tll and count, we will get the rising edge T12D which is one degree ahead of T12.
Thereafter, in the same manner, a pulse train PSID that is one degree ahead of the pulse train PS1 is obtained as a whole. Other pulse train PS2.
The same goes for PS3. The variable circuit 31 takes in the pulse train PS1 to P831 when advance angle control is not necessary, and takes in the pulse train PSII)-P just described when it is necessary.
83DK- is included.

Then, it is actually generated based on the phase of the pulse train including the gate signal G to the 4306 power transistors in the power transistor section. The on period of this gate signal G is the on period of each transistor, and the current during the on period is supplied to the starter generator, so that the phase of the % Isogo current is controlled to advance when necessary.

On the other hand, the field current is controlled by setting a value corresponding to the set pulse width in the down counter of the field current control circuit 41 at regular intervals generated by the internal timer of the microcomputer 30, and checking the output of the taroch circuit 47. 50, and the result is a pulse train 491 of a predetermined pulse width by inverting the 7 lip-flops at the point Of1d.
This is done by generating and applying this to the transistor 20 via the driver 42. This operation is shown in FIG.

The above is the overall operation of the controller 12, and these operations are controlled by the microcomputer 30, and the operation will be described in detail below. The main components of the microcomputer 30 include a manual interrupt routine (FIG. 8) that is activated each time the signals P81 to PS3 of the crank angle detector 5 rise and fall;
The routine is divided into three routines: the timer interrupt routine (FIG. 7), which is activated every time the program is executed, and the main routine (81Q), which is started by a reset signal and forms a closed loop. When the key switch is turned on and turned ON, power is supplied to the system, a power-on reset is performed on the microcomputer, and reJ is started from the reset at step 60 in FIG. Then step 62
The mode is determined by looking at the output of the A/D converter 39 and the output of the level conversion circuit 38, and since it is not the starter mode in this case, a signal is sent to turn off all six power transistors 14 to 19 (step 64Kst). 51 is output, and the process moves to step 69, where the output of the photoelectric circuit 36 is examined to determine charging. Since the motor has not rotated yet, there is no charging, so the process moves to step 72, and the charging indicator lamp 29 is turned on via the driver 40. Then, the process returns to step 62. If a timer interrupt occurs during this operation, the process jumps to step 8o in FIG. 7, where the counter in the microcomputer 30 first detects the rotational speed N (step 81), resets the counter (step 82), and determines the mode (step 83). ). In this case, since the ACG mode is ON, the process moves to step 85 and the charging rotation speed is determined to be N≧N+7, but since the switch has just been turned on, N < N s and the process jumps to step 88, where the field current is set to O. , returns to the main routine before the interrupt. Tip 9: At this time, the starter generator is not rotating yet, so there is no need to apply field current.

Now consider the case where the key switch is turned on to the starter position BT. At this time, the process moves from step 62 to step 63 in FIG. 6, where it is checked whether the rotational speed N is larger than a predetermined rotational speed No. If it is large, it is judged that phase control of the armature current is present, and if it is small, it is judged that in-phase control is not carried out, and this result is sent to the conversion circuit 3.
Set to 1.

Next, in steps 67 and 68, if the rotation speed N is higher than the high rotation speed N2 due to engine ignition, the operation mode ri is selected.
The ACG mode is set, and then the charging indicator lamp is turned on and off based on the charging determination similar to when the first switch is turned on (steps 69 to 72). When an input interrupt occurs due to the rise or fall of the outputs PS1 to PS3 of the crank angle detector 5, the program shown in FIG. 8 is activated, and in step 101, the rotation speed N is detected by the rotation speed counter.

Subsequently, when it is determined in step 102 that the mode is ST mode, the process moves to steps 103 and 104, and the interrupt signals are set to Psi, P82. It is determined which signal of PS3 is rising or falling, and the counter value of the phase advance angle corresponding to the rotation speed N is outputted to the down counter of the phase control circuit 32, and the process returns. If a timer interrupt occurs, the rotation speed N is detected in steps 81 and 82, and
If the ST mode is found in step 83, step 8
At step 4, the counter value of the field pulse width corresponding to the rotation speed NK is output to the down counter of the phase control circuit 41, and the field output is returned as '1'.

As described above, by performing field current control and armature phase angle control separately when operating as a starter9, the rotation speed and torque can be set individually, thereby improving the generated torque at a constant rotation speed. I can do it.

Next, when the engine starts and shifts to ACG mode, in the main routine of FIG. 6, from step 62 to step 6
4, here power transistors 15 to 19 (first
A command is issued to the conversion circuit 31 to turn off the charge indicator (FIG.), and then only the charge indicator lamp is controlled (steps 69 to 72). In the timer interrupt routine shown in FIG. 7, the number of revolutions is detected (steps 81 and 82), and the process moves from step 83 to step 85, where the number of revolutions N is set to a value Nl sufficient for photoelectric generation.
After confirming that the value exceeds the value, the process moves to steps 86 and 87, where the battery voltage ft is read via the A/D converter 39, and a variable pulse width signal for field current control is sent to the phase control circuit 41 to keep it at the assigned value. The field current is turned on (step 89).

In addition, in the input interrupt shown in FIG. 8, only the rotation number counter is counted up and the process returns.

In addition to the above, in this embodiment, overcurrent is detected by the current regulator 13, and the power transistors 15, 17 .
Since the power transistor 19 is configured to be turned off, there is an effect that damage to the power transistors 14 to 19 can be prevented when an overcurrent occurs.

[Effects of the Invention] As is clear from the above embodiments, according to the present invention, both the phase angles of the field current and the Saisogo current can be set individually, so the torque and rotation speed can be set individually during starter operation. This has the effect of making it possible to set the torque characteristics and improve the torque characteristics.

[Brief explanation of drawings]

FIG. 1 is a structural explanatory diagram of a starter generator, FIG. 2 is a wiring diagram showing the overall configuration of the device of the present invention, and FIG. 3 is a block diagram showing an embodiment of a controller that is a feature of the present invention.
Figures 4 and 5 are timing charts showing the operation of the controller for Figure 3, Figures 6, 7 and 8 are for Figure 3.
3 is a flowchart showing the operation of the controller shown in the figure. DESCRIPTION OF SYMBOLS 1... Armature winding, 2... Field winding, 3... Armature core, 4... Magnetic pole, 5... R2 ink angle detector, 6
... Notch plate, detector, 14-20... Power transistor, 21-26... Die cord, 27... Key switch, 28... Battery, 29... Charging indicator lamp, 30 ...Microcomputer, 32...
Phase control circuit, 39... A/D transformer, 41... Field control circuit.

Claims (1)

[Claims] 1. A rotating machine as a starter and a generator attached to the crankshaft of the engine, and when operating as a starter, when the number of revolutions during rotation exceeds a certain value, the rotating machine rotates according to the amount exceeding a certain value. It can be used as a generator by controlling the torque and rotation speed of the rotating machine by having the function of phase control that advances the phase of the armature current of the machine and field current control that controls the magnitude of the field current of the rotating machine. The motor is characterized by comprising a controller that controls field current so as to keep the battery voltage constant during operation, and a driver unit that supplies current to the armature and field winding of the rotating machine using the output of the controller. Integrated starter generator device. 2. The integrated starter-generator device according to claim 1, wherein the field current control during starter operation and generator operation is performed by varying the pulse width of a pulse train having a constant period. . 3. The controller has a function of switching to the operating state as a generator when the rotating machine is rotating at a predetermined number of rotations or more even when the key switch is in the starter position. The starter generator device according to scope 1. 4. A detector for the current output from the driver unit is provided, and the controller has a function of controlling the power transistor in the driver unit to be turned off for a certain period of time when an overcurrent is detected from the output of the detector. Claim 1 characterized in that
The integrated starter-generator device described in . 5. The controller has a function of lighting an indicator light indicating that charging is not being performed when both the voltage and rotation speed of one of the armature windings do not exceed predetermined values. An integrated starter-generator device according to claim 1.