JPH06105512A - Power supply device for vehicle - Google Patents

Abstract

PURPOSE:To reduce the size of a power supply device for vehicle and make it possible for the power supply device to protect an electrical load of a vehicle when it is broken or the like. CONSTITUTION:A winding for electrical driving 4 and a winding for power generation 5 are coiled around a stator in such a way that they do not overlap with each other. The winding for electrical driving 4 is engagedly held to a high voltage circuit that is connected with a high voltage battery 12 via a driver 11 in which diodes 11b are connected in parallel with transistors 11a in the reverse direction of the energization of the transistors 11a. The winding for power generation 5 is connected to a low voltage battery 15 and an electric load 14 via rectifiers for power generation 13. A regulator 17 is disposed for energizing a field coil 6 of a rotor in accordance with terminal voltages of the high voltage battery 12 and the low voltage battery 15. The high voltage battery 12 is used only at the time of electrical driving and is energized by high voltages, and hence the capacity and size of a power supply device can be reduced. Since the high voltage circuit is isolated from the low voltage circuit, no leakage occurs from the high voltage circuit to the low voltage circuit.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle power supply device having a single rotating electric machine.

[0002]

2. Description of the Related Art A single rotating electric machine is used as a generator driven by an engine or the like to charge a storage battery and supply electric power to an electric load of a vehicle. An example of a vehicle power supply device that is used as an electric motor and drives a rotating electric machine with a storage battery to start an engine is disclosed in Japanese Patent Application Laid-Open No. 2-87999. In this invention, in order to reduce the power loss when the rotating electric machine is used as an electric motor, a rotating battery is driven by a high voltage by providing a storage battery of high voltage specification, while DC-DC is applied to the load of the vehicle. The power once converted into a low voltage by the conversion converter is converted into a voltage corresponding to each load by the power supply device and supplied.

[0003]

However, in the above invention, one storage battery (battery) of a high voltage specification provided for reducing the power loss during electric driving is used as an electric load for an electric vehicle and an electric load for a vehicle. Since it is used for both purposes, it has the following drawbacks. Even if a low loss can be obtained in electric operation by using a high-voltage storage battery, an expensive step-down converter is required to supply electric power to an electric load of a low-voltage vehicle. Further, since the high-voltage specification storage battery also serves as a power supply source for the electric load of the vehicle, it is necessary to increase the capacity according to the electric load.In that case, the high-voltage specification storage battery with a large capacity is It must be large due to the internal structure of the storage battery. Furthermore, since the high-voltage storage battery and the electric load of the low-voltage specification vehicle are connected via the step-down converter, when a failure occurs in the step-down converter or the like, high voltage may be applied to the electric load of the low-voltage specification vehicle. There is.

The present invention provides a vehicular power supply device provided with a single rotating electric machine, which eliminates the above-mentioned drawbacks, is small in size and resistant to breakdown, and is capable of protecting a device as an electric load of a vehicle. The purpose is to provide.

[0005]

The present invention provides a rotating electric machine having a fixed armature and a rotor, which is driven to rotate, a field winding wound around the rotor, and the fixed armature. A wound first three-phase armature winding and a second three-phase armature winding wound around the fixed armature without overlapping the first three-phase armature winding. A high voltage storage battery for driving the rotating electric machine, a low voltage storage battery for supplying electric power to an electric load of a vehicle, and a plurality of diodes connected to the first three-phase armature winding, A first three-phase full-wave rectification circuit that rectifies the induced electromotive force generated in the first three-phase armature winding to charge the low-voltage storage battery, and each diode of the first three-phase full-wave rectification circuit. It consists of multiple switching transistors connected in parallel in the opposite direction to the current-carrying direction. An electric drive energizing circuit for supplying electric power of the high-voltage storage battery to the first three-phase armature winding to drive the rotating electric machine to rotate, and a second three-phase armature winding. A second three-phase full-wave rectifier circuit configured of a plurality of diodes to charge the low-voltage storage battery by rectifying the induced electromotive force generated in the second three-phase armature winding, the high-voltage storage battery, and the low-voltage Each voltage of the storage battery is detected,
A field for energizing the field winding when at least one of the case where the voltage of the high-voltage storage battery is below a first predetermined voltage or the case where the voltage of the low-voltage storage battery is below a second predetermined voltage is satisfied. A technical means consisting of a current control circuit is adopted.

[0006]

According to the present invention, when the rotating electric machine is driven to start the engine, for example, when the respective transistors of the drive energizing circuit are controlled in a predetermined manner, the high voltage storage battery is operated first.
The three-phase armature windings are energized in a predetermined manner to rotate the rotor and rotationally drive the engine and the like. On the contrary, when the rotating electric machine is rotationally driven by an engine or the like, the induced electromotive force generated in the second three-phase armature winding is subjected to full-wave rectification of the current or the electric load of the vehicle. Current is supplied by the low-voltage storage battery, and power is not supplied from the high-voltage storage battery. At this time, the voltage of the high voltage storage battery and the voltage of the low voltage storage battery are respectively detected by the field current control circuit, and if at least one of the voltages is lower than the respective predetermined voltage, the field wound around the rotor is detected. The magnetic winding is energized. Therefore, an induced electromotive force is generated in each of the three-phase armature windings wound around the fixed armature, which is rectified by the three-phase full-wave rectifier circuit, and the storage battery having a low voltage is charged. In this case, if the low-voltage storage battery is a low-voltage storage battery,
Since the current supplied to the electric load of the vehicle is large,
The electric power generated in the second three-phase armature winding is supplied not only for charging the low voltage storage battery but also for the electric load of the vehicle.

[0007]

According to the present invention, when the rotating electric machine is driven, the current is supplied from the high voltage storage battery, so that the current can be reduced and the power loss of the transistor in the drive energizing circuit can be reduced. . Further, the high-voltage storage battery is used only for driving the rotating electric machine and does not supply electric power to the electric load of the vehicle, so it is not necessary to increase the capacity, and a small high-voltage storage battery can be used. The price can be reduced. In addition, the high voltage battery
Along with the first three-phase armature winding and the first three-phase full-wave rectifier circuit, an independent circuit is formed for circuits on the low voltage side such as the low voltage storage battery and the electric load of the vehicle. The low-voltage storage battery can be appropriately charged according to the usage state of the electric load of the vehicle regardless of the voltage of the voltage storage battery. Further, since the first three-phase armature winding and the second three-phase armature winding are wound in the fixed armature without overlapping each other, when an abnormality occurs in the high voltage side circuit. Therefore, there is no possibility that a high voltage will flow into the circuit on the low voltage side due to electric leakage or the like. Therefore, it is possible to protect each circuit and device as the electric load of the vehicle.

[0008]

EXAMPLES Next, the present invention will be explained based on examples. FIG. 1 is a vehicle power supply device 10 including a vehicle generator-motor 1.
It is a circuit diagram of. The vehicular generator-motor 1 is rotationally driven by a vehicle engine (engine) (not shown).
As shown in FIG. 2, a stator 2 having a large number of slots formed on the inner peripheral surface thereof, and a plurality of magnetic poles facing the slots of the stator 2 formed on the outer peripheral surface of the stator 2, and the rotor 2 is rotatably arranged. It consists of three children.

The vehicular generator-motor 1 is a rotating electric machine that drives and generates electric power by using the stator 2 as an armature. The stator 2 has a first three-phase armature winding and a second three-phase electric machine. An electric winding 4 and a power generating winding 5, each of which has a three-phase configuration, are wound as sub-windings. Here, as shown in the drawing, the windings for electric power generation 4 and the winding for power generation 5 are arranged so that they do not overlap each other and do not share the same slot in the stator 2. The ranges are separated from each other, and each winding is divided into four groups of two so as to be point symmetrical with respect to the center point of the stator 2. In this embodiment, the electric winding 4 is set to 33 turns and the power generating winding 5 is set to 14 turns.

The electric winding 4 is provided with a plurality of transistors 1 which perform switching for controlling energization of the electric winding 4.
A driver 11 (IGBT) in which a plurality of diodes 11b that both protect the transistor 11a and rectify the back electromotive force of the electric winding 4 are connected in parallel in the reverse direction with respect to the energization direction of each transistor 11a. Are connected to each other, and the diode 11b of the driver 11 forms a three-phase full-wave rectifier circuit of the electric winding 4. Further driver 1
1, a high-voltage storage battery 12 of 288V, which corresponds to a battery of 24 12V batteries connected in series, is connected as an electric power source, and each transistor 11a of the driver 11 is arranged in a predetermined order by a drive control circuit (not shown). When it is ON-controlled by, the rotating magnetic field is generated in the stator 2, and the inner rotor 3 can be rotated. The high voltage circuit including the electric winding 4, the driver 11 and the high voltage storage battery 12 is electrically separated from the low voltage circuit including the power generation winding 5 and the low voltage storage battery 15 described below. ,
It is an ungrounded circuit (earth float circuit).

On the power-generating winding 5 of the stator 2, a power-generating rectifier 13 forming a three-phase full-wave rectifying circuit composed of a plurality of diodes for rectifying the back electromotive force generated in the power-generating winding 5.
Further, the power generation rectifier 13 has a low voltage of 12V as an electric load 14 of a vehicle such as an electronic device or a lamp (not shown), and a load power source for supplying electric power to the electric load 14. The storage battery 15 is connected in parallel. On the other hand, a field winding 6 is wound around the rotor 3, and the vehicle power supply device 10 is provided with a regulator 16 as shown in FIG. 3 for controlling energization of the field winding 6. ing.

The regulator 16 operates by using the low-voltage storage battery 15 as a power source, and controls the current from the low-voltage storage battery 15 by the switching transistor 17. The regulator 16 includes a high voltage storage battery 1 applied between terminals S1 and S2 for detecting a voltage on the high voltage circuit side.
A voltage dividing circuit 18 for converting the terminal voltage of 2 into a low voltage of 1/24 times, a photocoupler circuit 19 for electrically transmitting the voltage level of the output of the voltage dividing circuit 18 to the next stage, and a photocoupler circuit 19 There is a comparison circuit 20 for comparing the transmitted voltage level with the reference voltage, and a comparison circuit 21 for comparing the terminal voltage of the low voltage storage battery 15 applied to the terminal S3 with the reference voltage for detecting the voltage on the low voltage circuit side. In addition, there is an OR circuit 22 for controlling the transistor 17 according to the outputs of these two comparison circuits 20 and 21.

Each of the comparison circuits 20 and 21 has two reference voltages Vm1 (= 13.8V) and Vm2 (= 14.6V), and the detected target voltage Vn of each storage battery is Vn. Is between these two reference voltages (1
High level is output to 3.8 ≦ Vn ≦ 14.6). The transistor 17 is turned on in response to the high-level output of each of the comparison circuits 20 and 21 obtained via the OR circuit 22, and the voltage of the low voltage storage battery 15 applied via the terminal B is connected via the terminal F. It is applied to the magnetic winding 6 to conduct electricity.

Next, the operation of the vehicle power supply device 10 of the present embodiment having the above configuration will be described. When the key switch is operated at the time of starting the vehicle engine, the transistor 11a of the driver 11 is on-controlled in a predetermined order by a drive control circuit (not shown), and the three-phase electric winding 4 is energized in a predetermined order. When a rotating magnetic field is generated in the stator 2,
In response to this, the rotor 3 starts to rotate. As a result, the engine connected to the rotor 3 is rotationally driven to start, and when the start of the engine is detected, the energization of the electric winding 4 by the transistor 11a ends. On the other hand, during operation of the engine, each terminal voltage of the high voltage storage battery 12 and the low voltage storage battery 15 is detected by the regulator 16, and when each terminal voltage is within the range of the reference voltage, the transistor 17 causes the field winding. Power is supplied to the wire 6. as a result,
In the motor winding 4 and the power generation winding 5, a counter electromotive force is generated by the rotation of the rotor 3, and the current is rectified by the diode 11b and the power generation rectifier 13 in the driver 11, and the high voltage storage battery 12 is Charged, or
The low-voltage storage battery 15 is charged and supplied to the electric load 14.

As described above, in this embodiment, the drive power source for the vehicle generator-motor 1 and the storage battery for supplying power to the electric load 14 are separately provided, and the high-voltage storage battery 12 is used as the drive power source. Since it is provided, the power loss in the transistor 11a of the driver 11 is small when the vehicular generator-motor 1 is driven. Further, since the high-voltage storage battery 12 does not supply electric power to the electric load 14, the capacity of the high-voltage storage battery 12 with high-voltage specifications can be reduced, and the size and cost can be reduced. In addition, the motor winding 4 and the power generation winding 5
However, since the stators 3 do not overlap each other and are not electrically connected, the high voltage does not leak to the low voltage side circuit when an abnormality occurs in the high voltage side circuit.
Therefore, it is possible to protect each electronic device or the like that becomes the electric load 14 of the vehicle.

In the above embodiments, the vehicle generator motor 1 is driven by the vehicle running engine.
The engine is not limited to the one for traveling, and may be a separately installed sub engine. Further, instead of the engine, the vehicular generator-motor 1 may be driven by a traveling motor in an electric vehicle. In this case, the power generation by the vehicular generator-motor 1 uses the rotational force of the vehicle inertial force during braking of the vehicle. In the above embodiment, the electric motor winding 4 and the power generator winding 5
Are separated from each other on the circumference of the stator 2,
May be separated in the radial direction of, for example, by making the depth of accommodation of each winding in the slot different. Although the high voltage storage battery 12 and the low voltage storage battery 15 have a large voltage difference in the above embodiment,
Each voltage is not limited to the above, and for example, the low voltage side may be 24V and the high voltage side may be 48V.

[Brief description of drawings]

FIG. 1 is a circuit diagram showing a vehicle power supply device of the present invention.

FIG. 2 is a schematic diagram showing an arrangement of windings in the vehicular generator-motor of the present invention.

FIG. 3 is a block diagram of a regulator in the vehicle power supply device of the present invention.

[Explanation of symbols]

 1 Vehicle Generator Motor (Rotary Electric Machine) 2 Stator (Fixed Armature) 3 Rotor 4 Electric Winding (First Three-Phase Armature Winding) 5 Power Generation Winding (Second Three-Phase Armature Winding) Line 6 field winding 11a transistor (driving energizing circuit) 11b diode (first three-phase full-wave rectifying circuit) 12 high-voltage storage battery 13 power generation rectifier (second three-phase full-wave rectifying circuit) 14 electric load 15 Low voltage storage battery 16 Regulator (field current control circuit)

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[Procedure amendment]

[Submission date] March 16, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0016

[Correction method] Change

[Correction content]

In the above embodiments, the vehicle generator motor 1 is driven by the vehicle running engine.
The engine is not limited to the one for traveling, and may be a separately installed sub engine. Further, instead of the engine, the vehicular generator-motor 1 may be driven by a traveling motor in an electric vehicle. In this case, the power generation by the vehicular generator-motor 1 uses the rotational force of the vehicle inertial force during braking of the vehicle. In the above embodiment, the electric motor winding 4 and the power generator winding 5
Are separated from each other on the circumference of the stator 2,
May be separated in the radial direction of, for example, by making the depth of accommodation of each winding in the slot different. Although the high voltage storage battery 12 and the low voltage storage battery 15 have a large voltage difference in the above embodiment,
Each voltage is not limited to the above, and for example, the low voltage side may be 24V and the high voltage side may be 48V.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Name of item to be corrected] Brief description of the drawing

[Correction method] Change

[Correction content]

[Brief description of drawings]

FIG. 1 is a circuit diagram showing a vehicle power supply device of the present invention.

FIG. 2 is a schematic diagram showing an arrangement of windings in the vehicular generator-motor of the present invention.

FIG. 3 is a block diagram of a regulator in the vehicle power supply device of the present invention.

[Description of Reference Signs] 1 vehicle generator motor (rotary electric machine) 2 stator (fixed armature) 3 rotor 4 electric winding (first three-phase armature winding) 5 power generating winding (second Three-phase armature winding 6 Field winding 11a Transistor (driving energizing circuit) 11b Diode (first three-phase full-wave rectifier circuit) 12 High-voltage storage battery 13 Power generation rectifier (second three-phase full-wave rectifier) Circuit) 14 Electric load 15 Low voltage storage battery 16 Regulator (field current control circuit)

Claims (1)

[Claims] 1. A rotary electric machine that has a fixed armature and a rotor and is driven to rotate, a field winding wound around the rotor, and a first three windings wound around the fixed armature. -Phase armature windings, second three-phase armature windings wound around the fixed armature without overlapping the first three-phase armature windings, and for driving the rotating electric machine A high voltage storage battery, a low voltage storage battery for supplying electric power to an electric load of a vehicle, and a plurality of diodes connected to the first three-phase armature winding. A first three-phase full-wave rectifier circuit that rectifies the induced electromotive force generated in the line to charge the low-voltage storage battery, and each diode of the first three-phase full-wave rectifier circuit in a direction opposite to the energization direction. The first three-phase armature winding comprising a plurality of switching transistors connected in parallel A drive circuit for supplying electric power from the high-voltage storage battery to drive the rotating electric machine to rotate, and a plurality of diodes connected to the second three-phase armature winding. A second three-phase full-wave rectifier circuit that rectifies the induced electromotive force generated in the three-phase armature winding to charge the low-voltage storage battery, and detects each voltage of the high-voltage storage battery and the low-voltage storage battery, A field for energizing the field winding when at least one of the case where the voltage of the high-voltage storage battery is below a first predetermined voltage or the case where the voltage of the low-voltage storage battery is below a second predetermined voltage is satisfied. A power supply device for a vehicle including a current control circuit.