JPH0348760B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Technical Field The present invention relates to a charging generator that also serves as a starter motor and which can generate a large rotational torque and control the generated voltage.

(b) Prior art Conventionally, to control the speed and torque of a DC motor, the position of the rotor magnetic poles was detected magnetically and semiconductor elements were used, as seen in Japanese Patent Laid-Open No. 55-49963. A known method is to control the current flowing through the stator windings using electronic circuits.

On the other hand, automobiles are equipped with a starter motor (DC motor) for starting the engine and a generator (AC generator) for charging the battery, each of which is quite heavy, so it is necessary to use both the motor and generator. It is conceivable to use it as a starter motor when starting the engine, and as a generator after starting the engine. However, since a car uses a battery as its drive source, a DC/AC conversion circuit is required to operate it as an AC motor, and a circuit to adjust the generated voltage while charging the battery is required to operate it as a generator. Become.

(c) Object and structure of the invention The present invention has been made in view of the above points, and an object of the present invention is to propose a charging generator that also serves as a starting motor, which can obtain a large rotational torque by AC drive, and can control the generated voltage. For this purpose, one rotating magnetic pole and two armature windings are provided, and when operating as a motor, DC exchanged alternating current is supplied to both armature windings to obtain sufficient rotational torque, and the motor is operated as a generator. In this case, the voltage induced in one armature winding is controlled by the current flowing in the other armature winding.

(d) Examples The present invention will be explained below based on the drawings.

FIG. 1 shows an electric circuit of an embodiment of a starting motor/charging generator according to the present invention. In the electric motor/charging generator according to the present invention, a field pole 1 made of permanent magnets is used as a rotor, and three-phase star-connected windings 2a, 2b, 2c are fixed as main armature windings. These armature windings 2a, 2 are placed at positions corresponding to the wires 2a, 2b, 2c, respectively.
Auxiliary armature winding 3 with fewer turns than b and 2c
Fix a, 3b, and 3c. 4a, 4b, 4c are rotor position detectors that detect the rotor position with respect to the main armature windings 2a, 2b, 2c and the auxiliary armature windings 3a, 3b, 3c, which step down the voltage of the battery 4 and keep it constant. A voltage is supplied from a constant voltage circuit 5 that outputs voltage, and outputs an ON/OFF position signal as shown in FIG. 2 depending on the polarity of the rotor.
In this example, the ON period is set to 180 degrees electrical angle.
This electrical angle may be between 120° and 240°. Furthermore, the position signals from the rotor position detectors 4a, 4b, and 4c are each shifted by 120 degrees in electrical angle. This position signal is input to a control signal generation circuit 8 that generates control signals, and the continuity control signals FS ₁ to FS generated here are
FS ₆ is inputted to the main armature current conduction control circuit 6 and the auxiliary armature current conduction control circuit 7.

The control signal generation circuit 8 has the configuration shown in FIG.
82 and 83, and AND circuits 84 to 89 perform the logical AND operation to form conduction control signals FS ₁ to FS ₆ shown in FIG. 3.

The main armature current conduction control circuit ₆ has _{the configuration shown} in FIG.
The currents Ia, Ib, and Ic flowing through a, 2b, and 2c are controlled.

The auxiliary armature current conduction control circuit ₇ , as shown in _FIG .
FS ₁ to FS ₆ and auxiliary armature operation control circuit 9 described later
The final stage transistors Tr ₇ to Tr ₁₂ are controlled by the signal logically ANDed with the operation control signal AS from the auxiliary armature windings 3 a, 3 b, and 3 c.

The auxiliary armature operation control circuit 9 is connected to the main armature winding 2
A, 2b, 2c are connected to the output voltage _S1 of the rectifier circuit 10 having the configuration shown in FIG. The signal S ₂ generated via the current resistance R and the voltage limiting Zener diode D
and the output voltage _S3 of the constant voltage circuit 5 are input, and the circuit configuration is as shown in FIG.
In the comparator 180, the constant voltage output voltage _S3 is connected to the resistor
Using the voltage divided by R ₁ and R ₂ as a reference signal, the output voltage S ₁ of the rectifier circuit 10 is compared with the voltage divided by resistors R ₃ and R ₄ to determine the output voltage S ₁ of the rectifier circuit 10. When the divided voltage exceeds the reference voltage, the output of the comparator 180 switches from OFF state to ON state and the start side contact 11 of the ignition switch 11
An OR circuit 181 performs a logical sum with the signal S ₂ from a, and inputs the output AS to the auxiliary armature current conduction control circuit 7. As shown in FIG. 7, the rectifier circuit 10 includes a set of diodes D ₁ for each auxiliary armature,
It is full-wave rectified by D ₂ , D ₃ , D ₄ , D ₅ , and D ₆ and output as voltage S ₁ .

The output of the rectifier circuit 10 is connected to the ON contact 11b of the ignition switch 11. Note that 12 in FIG. 1 is an electrical load connected to the battery 4. Further, 13 is a line connected to the start side contact 11a of the ignition switch 11, 14 is a line connected to the positive side terminal of the battery 4, and 15 is an output line of the constant voltage circuit 5.

Next, the operation will be explained.

At the time of starting, the ignition switch 11 is connected to the start side contact 11a, so power supply voltage is supplied from the battery 4 to the main armature current conduction control circuit 6, and the signal S is also supplied to the auxiliary armature operation control circuit 9. ₂ inputs, so its output AS is
The auxiliary armature current conduction control circuit 7 becomes ON state.
make it work. The main armature current conduction control circuit 6 and the auxiliary armature current control circuit 7 perform the conduction control shown in FIG. Armature current Ia, Ib, based on signals FS ₁ to _{FS 6}
Output Ic, I′a, I′b, and I′c. As a result, current flows through the main armature windings 2a, 2b, 2c and the auxiliary armature windings 3a, 3b, 3c, the field pole 1 rotates, and sufficient starting torque is obtained.

When charging, ignition switch 11
Connected to ON contact 11b. The field pole 1 rotates as the engine rotates, and the main armature windings 2a, 2b,
A three-phase AC electromotive force is generated at 2c, and the voltage rectified by the rectifier circuit 10 is supplied to the battery 4 and electric load 12 via the ignition switch 11. When the generated voltage rises above the reference value and the voltage obtained by dividing the output voltage S ₁ rectified by the rectifier circuit 10 exceeds the reference voltage obtained by dividing the voltage S ₃ in FIG. 8, the auxiliary armature operation control circuit 9 Since the output AS becomes "H", the auxiliary armature current conduction control circuit 7 operates, and the surplus power generated in the main armature windings 2a, 2b, 2c is transferred to the auxiliary armature windings 3a, 3b, 3.
b, and converts it into rotational torque of the rotor. When the generated voltage is below the reference voltage, the output AS of the auxiliary armature operation control circuit 9 is "L", so the auxiliary armature current conduction control circuit 7 does not operate, and therefore the main armature windings 2a, 2b , 2c. In this way, the generated voltage can be efficiently controlled.

FIG. 9 shows another embodiment of the starter motor/charging generator according to the present invention.

This embodiment is first in that the armature winding is two-phase.
The only differences from the embodiment shown in the figures are otherwise the same, so that the same reference numerals refer to the same parts. The circuit operation of this embodiment is almost the same as that of the embodiment shown in FIG. 6 is rotor position detector 4a, 4b
According to the continuity control signals FS ₁ to _{FS 6} output from the control signal generation circuit 8 based on the position signals from the
AC current is supplied to the main armature windings 2a and 2b.
On the other hand, since the auxiliary armature current conduction control circuit 7 is conductive because the start side contact 11a is connected to the battery 4, the auxiliary armature operation control circuit 9 outputs "H", so the conduction control signal is also output.
Auxiliary armature winding 3a, 3b based on FS ₁ to FS ₆
An alternating current is supplied to the Thus, the field pole 1 is connected to the main armature windings 2a, 2b and the auxiliary armature windings 3.
The current flowing through both a and 3b rotates and generates torque.

During charging, the field pole 1 is rotated by the engine and a two-phase AC electromotive force is generated in the main armature windings 2a, 2b. This two-phase AC electromotive force is rectified by a rectifier circuit 10, and is supplied to a battery 4 and an electric load 12 via an ignition switch 11. When the generated voltage rises above the reference value and the output terminal voltage of the rectifier circuit 10 exceeds the reference voltage (for example, the maximum value of battery charging voltage 14.3V), "H" is output from the auxiliary armature operation control circuit 9, so the auxiliary armature Auxiliary armature windings 3a, 3b via current conduction control circuit 7
The main armature windings 2a, 2b are
It is possible to control the generated voltage induced in the

In this embodiment, since two-phase windings are used for the main and auxiliary armature windings, the number of associated circuit elements can be reduced, improving reliability and facilitating maintenance. Also,
It is also possible to make the armature winding a three-phase Δ connection or a polyphase connection of three or more phases.

(e) Effects of the invention As explained above, in the present invention, one rotating field pole and two armature windings are provided, and when operating as a motor, DC converted alternating current is supplied to both armature windings. However, when operating as a generator, the voltage induced in one armature winding is controlled by the current flowing through the other armature winding.
As an electric motor, a large rotational torque can be obtained and the generated voltage can be controlled. In particular, if the armature winding is composed of two-phase windings, fewer circuit elements are used, resulting in a simpler circuit configuration, improved reliability, and easier maintenance.

[Brief explanation of drawings]

FIG. 1 is an electric circuit of an embodiment of the starting motor/charging generator according to the present invention, FIG. 2 is a time chart of the position signal of the rotor position detector of FIG. 1, and FIG. 3 is a diagram of the continuity control signal. Time chart, Fig. 4 is an embodiment of the control signal generation circuit, Fig. 5 is an embodiment of the main armature current conduction control circuit, Fig. 6 is an embodiment of the auxiliary armature current conduction control circuit, and Fig. 7 is an embodiment of the control signal generation circuit. The figure shows one embodiment of the rectifier circuit, FIG. 8 shows an embodiment of the auxiliary armature operation control circuit, and FIG. 9 shows an electric circuit of another embodiment of the starter motor/charging generator according to the present invention. 1... Field pole, 2a, 2b, 2c... Armature winding, 3a, 3b, 3c... Auxiliary armature winding, 4...
... Battery, 4a, 4b, 4c ... Rotor position detector, 5 ... Constant voltage circuit, 6 ... Main armature current conduction control circuit, 7 ... Auxiliary armature current conduction control circuit, 8 ... Control signal Generation circuit, 9... Auxiliary armature operation control circuit, 10... Rectifier circuit, 11... Ignition switch, 11a, 11b... Contact,
12... Electric load, 13, 14, 15... Line, 81, 82, 83... Inverter, 180...
...Comparator, 181...OR circuit.

Claims (1)

[Claims] 1 Switch 11, battery 4, and field pole 1
, main armature windings 2a, 2b, 2c, auxiliary armature windings 3a, 3b, 3c, rectifying means 10, main armature current conduction control means 6, auxiliary armature operation control means 9, auxiliary armature windings 3a, 3b, 3c, The switch 11 has a start side contact 11a and an armature current conduction control means 7.
When the switch 11 is connected to the start side contact 11a, the field pole 1 starts the engine by rotating, and the field pole 1 starts the engine by rotating the switch 11.
is connected to the ON contact 11b, the main armature windings 2a, 2b, 2c and the auxiliary armature windings 3a, 3b, 3c are rotated by the rotational force from the engine. The main armature windings 2a, 2b, 2c are arranged near the field pole 1, and the main armature windings 2a, 2b, 2c are arranged so that the field pole 1 rotates when the switch 11 is connected to the ON contact 11b. Therefore, an electromotive force is generated, and the rectifying means 10 is connected to the main armature winding 2a,
2b and 2c to charge the battery 4 by rectifying the alternating current electromotive force generated in the switches 2b and 2c. The power generated from the battery 4 is supplied to the main armature windings 2a, 2b, 2c to generate rotational force in a predetermined direction in the field pole 1, and the auxiliary armature operation control means 9 When the switch 11 is connected to the start side contact 11a side, or when the switch 11 is connected to the ON contact 11
b and outputs an operation signal when the voltage rectified by the rectifier 10 is higher than a predetermined voltage, and the auxiliary armature current conduction control means 7 receives the operation signal and outputs an operation signal. At this time, part of the power output from the rectifying means 10 or the power generated from the battery 4 is transferred to the auxiliary armature windings 3a, 3.
3b and 3c to generate rotational force in the predetermined direction at the field pole 1.