JPH0236800A - Generator for vehicle - Google Patents

Abstract

PURPOSE:To always effectively utilize a generating winding by providing a plurality of sets of stator windings, providing rectifiers at the respective stator windings, and connecting in series or in parallel the rectifiers. CONSTITUTION:In a normal voltage mode, a switch 13 is closed and a switch 15 is connected to a contact 15a. In this state, rectifiers 7, 8 are connected in parallel, and stator windings 5, 6 are connected in parallel. On the other hand, in a high voltage mode, the switch 13 is opened, and the switch 15 is connected to a contact 15b side. In this state, the thyristor 18 of a series/parallel switching circuit 9 is turned ON. Accordingly, the rectifiers 7, 8 are connected in series, and the windings 5, 6 are connected in series. Thus, the body of the device can be reduced in size.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a power generation device that is mounted on a vehicle such as an automobile and that charges a battery and supplies power to various electrical devices.

[Prior Art] Conventionally, this type of power generation device has a common voltage (for example, 14
A high-voltage power generating device is known that can generate power by switching between V) and a higher voltage (for example, 60 V).

To explain the ship side according to FIG. 3, this high-voltage power generation device has rotor windings 41
, a stator winding '41A42 for generating AC voltage as the rotor rotates, and a stator winding 4 for converting the AC voltage generated by the stator winding 42 into DC voltage.
2, and a voltage adjustment circuit 44 that supplies adjustment current to the rotor winding 41 in order to adjust each phase AC voltage generated in the stator winding 42 to a conductive value. An auxiliary winding ff, 145 is connected in series to the winding 42, and the auxiliary winding 45 is provided with another rectifier circuit 46.

When charging the battery 47 or operating a regular voltage load 48 such as a headlight, the switch 49 is turned on, the switch 50 is turned off, and the switches 52 and 53 are turned on.

Thereby, the regular voltage generated by the stator winding 42 and rectified by the rectifier circuit 43 is supplied to the battery 47 or the regular voltage load 48.

Further, when operating a high voltage load 51 such as a front defogger for defrosting ice that requires high voltage, the switch 49 is turned off, the switch 50 is turned on, and the switch 52 is turned on. Thereby, the high voltage generated by the stator winding vA42 and the auxiliary winding 45 and rectified by another rectifier circuit 46 is supplied to the high voltage load 51.

[Problems to be Solved by the Invention] However, in the power generation device, when there is no need to operate the high voltage load 51, especially in the summer when the front defogger does not require it, the auxiliary winding vA45 is not used for power generation. Not only was it not used at all, but it ended up taking up wasted space.

Further, in the power generation device, the stator winding for normal voltage generation is
In order to connect the auxiliary winding 45 to the fIIA 42 in series, the size of the power generating apparatus is certainly increased by the amount that the auxiliary winding vA45 is connected in series to the stator winding 42.

This invention was made in view of the above-mentioned circumstances, and its purpose is to make it possible to generate both regular voltage and high voltage by effectively utilizing the power generation winding at all times, and to miniaturize the configuration for this purpose. The object of the present invention is to provide a vehicle power generation device that can be used in a vehicle.

[Means for Solving the Problems] In order to achieve the above object, the present invention includes a rotor winding provided on the rotor, a stator winding that generates alternating current voltage of each phase as the rotor rotates, and A rectifier circuit that converts each phase AC voltage generated by the stator windings into DC voltage, and supplies an adjustment current to the rotor windings in order to adjust each phase AC voltage generated by the stator windings to a conductive value. In a vehicle power generator equipped with a voltage adjustment circuit, multiple sets of stator windings are provided, and a rectifier circuit is provided for each set of stator windings, and each rectifier circuit is connected in series to generate high voltage power. Alternatively, a series/parallel switching circuit is provided to switch each rectifier circuit to parallel connection in order to perform low voltage power generation.

[Operation] Therefore, in order to perform low-voltage power generation, the series-parallel switching circuit switches each rectifier circuit to parallel connection, thereby connecting each set of stator windings in parallel. The voltage generated by each set of stator windings, adjusted to a passivity value by a voltage adjustment circuit, and converted to direct current by each rectifier circuit is supplied as a low voltage to a predetermined load.

On the other hand, in order to perform high-voltage power generation, the series-parallel switching circuit switches each rectifier circuit to series connection, thereby connecting each set of stator windings in series. The voltage generated by each set of stator windings, adjusted to a passivity value by a voltage adjustment circuit, and converted to direct current by each rectifier circuit is supplied as a high voltage to a predetermined load.

In this way, in each case of switching between low voltage and high voltage to generate power, all stator windings are always used for power generation.

In addition, since each rectifier circuit is connected in parallel, that is, each set of stator windings is connected in parallel to supply low voltage to the load, each set of stator windings is connected to a low voltage winding. There is no need to use wire specifications, and it is possible to use thinner winding specifications than those for low voltage.

[Example] Hereinafter, an example in which the present invention is embodied in a power generation device for an automobile will be described in detail based on the drawings.

FIG. 1 is an electrical circuit diagram showing a power generation device 1 of this embodiment, a battery 2 related thereto, a common voltage (low voltage) load 3, a resistor 4 deposited on a front window as a high voltage load, and the like. In this embodiment, the normal voltage load 3 is an electrical device such as a headlight, and is operated by supplying a normal voltage (for example, 14 cm) in the same way as the battery 2. Further, in this embodiment, the resistor 4 is a transparent material deposited on the windshield, and in order to remove ice from the windshield, a high voltage (higher than the normal voltage) is applied.
For example, heat is generated by applying a voltage of 60 cm).

The power generation device 1 includes a 2 m first stator winding 5 and a second stator winding \a6 for three-phase alternating current, and each stator winding 5,
A first rectifier circuit 7 and a second rectifier circuit 8 for converting each phase AC voltage generated in step 6 into a DC voltage, and a series-parallel circuit for switching each rectifier circuit 7.8 to series connection or parallel connection. A switching circuit 9, a backflow blocking diode 10, and a rotor winding 1 provided on the rotor (path shown) to adjust each phase AC voltage generated at each stator winding 5.6 to a conductive value.
2 and a voltage adjustment circuit 11 that supplies an adjustment current.

Each stator winding 5, 6 is composed of three Y-connected windings 5a-5c, 6a-6c.

Each rectifier circuit 7.8 has six diodes 7a to 7.
f, 8a to 8f constitute a three-phase bridge circuit. The cathode side of the first rectifier circuit 7 is connected to the positive side of the battery 2 and the regular voltage load 3 via the first switch 13 .

The first switch 13 is turned off in conjunction with an ice-breaking switch (the path shown in the figure) that operates the resistor 4.

Further, the common voltage load 3 is provided with a second switch 14 for turning it on and off.

The cathode side of the second rectifier circuit 8 is connected to the third switch 15 . One contact 15 of the third switch 15
A is connected between the first switch 13 and the battery 2, and the other contact 15b is connected to the positive side of the resistor 4.

Further, the negative sides of the battery 2, the regular voltage load 3, and the resistor 4 are respectively connected to the anode side of each rectifier circuit 7.8. A backflow blocking diode 1o is connected between the anode sides of each rectifier circuit 7.8.

The series/parallel switching circuit 9 is composed of a resistor 17 and a SIRISK 18. The anode of the thyristor 18 is connected to the cathode side of the first rectifier circuit 7. Further, the cathode of the thyristor 18 is connected between the second rectifier circuit 8 and the reverse current blocking diode IO. Furthermore, thyristor 1
8 is connected to a contact 15b of the third switch 15 via a resistor 17.

The voltage adjustment circuit 11 controls the adjustment current supplied to the rotor winding 12 by turning on and off each transistor 19, 20 with a Zener diode 28, thereby adjusting the output voltage of each stator winding yA5.6 to a constant value. This is a well-known circuit.

In this voltage adjustment circuit 11, the anode of the diode 25 is connected to the battery 2, and the cathode is connected to the resistor 2.
1.22 are connected in series.

One end side of this resistor 22 is connected to the emitter of each transistor 19, 20. Further, the resistors 21 and 22 are connected to the base of the transistor 20 via a Zener diode 28. Furthermore, a diode 25 and a resistor 21
A diode 26 connected in series with the resistor 23 is connected between the
The cathode of is connected. One end of the resistor 23 is connected to a contact 15b of the third switch 15.

The collector of transistor 20 is connected to the base of transistor 19, and the collector of transistor 19 is connected between first switch 13 and battery 2 via diode 27 and fourth switch 29. The fourth switch 29 is turned on and off in conjunction with the ignition switch.
This is a switch that is turned off. Further, a resistor 24 is connected between the base of the transistor 19 and the cathode of the diode 27, and a resistor 24 is connected between the collector of the transistor 19 and the cathode of the diode 27.
A rotor winding 12 is connected between the cathode 7 and the cathode 7.

In this embodiment, when the voltage applied through the diode 25 exceeds 14V, which determines the passivity value of the common voltage, the Zener diode 28 becomes conductive, turning on the transistor 20 and turning off the transistor 19. is set to be Further, when the voltage applied to one end of the resistor 23 exceeds 60V, which determines the passivity value of the high voltage, the Zener diode 28 becomes conductive, the transistor 20 is turned on, and the transistor 19 is turned off. It is set.

Next, the operation of the power generation device configured as described above will be explained.

To set the common voltage mode for supplying common voltage, as shown in FIG. 1, the first switch 13 is turned on and the third switch 15 is connected to the contact 15a side.

In this state, no gate voltage is applied to the thyrisk 18 of the series/parallel switching circuit 9, and the thyrisk 18 is in an off state. Each rectifier circuit 7.8 is therefore connected in parallel, thereby connecting the stator windings 5.6 in parallel.

In this state, when the ignition switch is turned on, the engine is started, the rotor is rotated, and the fourth
The switch 29 is interlocked and turned on. The alternating current voltage generated by each set of stator windings 5.6 based on the rotation of the rotor is converted into a direct current voltage by each rectifier circuit 7.8, and is supplied as a normal voltage to the battery 2 for charging. . Further, when the second switch 14 is turned on at this time, the common voltage load 3 is supplied with the common voltage and the load 3 is operated.

On the other hand, a resistor 4 is used to remove ice from the windshield.
To set the high voltage mode in which a high voltage is supplied to the ice cap, a deicing switch (not shown) is turned on, the first switch 13 is turned off, and the third switch 15 is connected to the contact 15b side.

In this state, when the rotor is rotated and the fourth switch 29 is turned on, a gate voltage is applied to the cyrisk 18 of the series-parallel switching circuit 9, and the cyrisk 18
is turned on. Therefore, each rectifier circuit 7, 8 is connected in series, and thereby the stator S'fa5.6 is connected in series. Then, the AC voltage generated by each set of stator windings 5 and 6 is converted into DC voltage by each rectifier circuit 7.8,
It is supplied to the resistor 4 as a high voltage.

By supplying this high voltage, the resistor 4 immediately generates heat to remove ice from the windshield. At this time, since the first switch 13 is in the off state, the battery 2 is not charged at a high voltage.

In addition, in each setting state of the normal voltage mode and the high voltage mode, when the output voltage from each stator winding 5, 6 is low due to fluctuations in engine speed, etc., the voltage adjustment circuit 1
The Zener diode 28 of No. 1 is no longer conductive, the transistor 20 is turned off, and the transistor 19 is turned on. This causes a regulating current to flow through the rotor winding 12, increasing the output voltage of each stator winding 5.6. Further, when the output voltage of each stator winding 5.6 is high, the Zener diode 28 is conductive, the transistor 20 is turned on, and the transistor 19 is turned off.

As a result, the adjustment current no longer flows through the rotor winding 12, and the output voltage of each stator winding 5, 6 decreases.

In this way, the voltage adjustment circuit 11 controls the adjustment current to the rotor winding 12 according to each mode setting state, and adjusts the output voltage from each stator winding 5, 6 to a conductive value. Therefore, a constant working voltage or high voltage can always be supplied to the battery 2, the working voltage load 3, or the resistor 4.

As described above, in the power generation device 1 of this embodiment, in each mode setting state in which electricity is generated by switching between the normal voltage and the high voltage, all the stator @ wires 5, 6 and each rectifier circuit 7.8
can be effectively used for power generation at all times.

In addition, in the power generation device 1 of this embodiment, the rectifier circuits 7 and 8 are connected in parallel, that is, the stator windings 5 and 6 are connected in parallel to supply the common voltage to the common voltage load 3. Therefore, the windings 5a to 5c constituting each stator winding 5.6
, 6a to 6C do not need to be unified to the winding specifications for common voltage, and can be handled by using thin winding specifications.

As a result, the actual volume of the stator winding 5.6 can be reduced by using thin winding specifications, and the size of the power generation device 1 can be reduced.

That is, in the power generating apparatus of the conventional example, the size of the power generating apparatus is certainly increased by the series connection of the auxiliary winding 45. However, in the power generation device 1 of this embodiment, since the common voltage is generated when the stator windings 5 and 6 are connected in parallel, the thickness of each of the two windings 5a to 5c and 6a to 6C is reduced. The thickness may be set to correspond to the thickness of one winding wire for common voltage. In other words, if the power generated by the power generator is constant, if the voltage generated by each stator winding 5゜6 becomes high, the current will become small, and if the voltage becomes normal (low voltage), the current will become large. . Therefore, if the thickness of two windings 5a to 5c and 6a to 6C is set to a thickness that can handle the current of the common voltage during power generation at normal voltage, one of the windings 5a to 5c and 5a to 6C The thickness alone is enough to handle the current during high-voltage power generation.

Therefore, the thin windings 5a to 5c, 5a to 6C can facilitate the winding work, and in the entire power generation device 1, the actual volume of each stator winding 5, 6 is smaller than that of the stator winding of the conventional example. It can be made to the extent equivalent to a real volume of 42 minutes. Therefore, it is possible to provide a compact device as a high-voltage compatible power generation device that can be used by switching between the normal voltage and the high voltage.

Further, in this embodiment, a semiconductor switch made of Cyrisk 18 and a resistor 17 are used as the series/parallel switching circuit 9. For this reason, the series/parallel switching circuit 9 can be made smaller to
It can be easily integrated into.

As a result, it is possible to provide an effective power generation device that can be easily installed in a space-restricted automobile.

Note that this invention is not limited to the above embodiments,
The present invention can be implemented as follows by changing a part of the structure as appropriate without departing from the spirit of the invention.

(1) In the embodiment described above, the series/parallel switching circuit 9 was constructed from the resistor 17 and the SIRISK 18 as shown in FIG. 1, but it may also be constructed from the resistor 30, 31 and the transistor 32 as shown in FIG. Good; in this case, in order to set the high voltage mode, by turning off the first switch 13 and connecting the third switch 15 to the contact L5b, the transistor 32 is turned on and each rectifier circuit 7, 8 is turned on. connected in series. On the other hand, to set the common voltage mode,
Turn on the first switch 13 and turn on the third switch 1
5 to the contact 15a, the transistor 3
2 is turned off and each rectifier circuit 7.8 is connected in parallel.

(2) In the above embodiment, two sets of stator windings 5 and 6, the first and second stator windings, were provided to switch between the normal voltage and the high voltage for power generation, but three or more sets of stator windings It may be configured so that the power is generated by switching between the common voltage and the high voltage.

(3) In the above embodiment, the present invention was applied to the resistor 4 deposited on the front window as a high voltage load, but the present invention may also be applied to other electric devices such as electric heaters.

[Effects of the Invention] As detailed above, according to the present invention, all the stator wires for power generation can be effectively used at all times to generate power for both normal voltage and high voltage. It has the excellent effect of being able to downsize.

[Brief explanation of the drawing]

Fig. 1 is an electric circuit diagram showing a power generation device and related loads etc. showing one embodiment embodying the present invention, Fig. 2 is an electric circuit diagram showing another embodiment of the series-parallel switching circuit, and Fig. 3 The figure is an electric circuit diagram showing a conventional power generation device and related loads. In the figure, 5 is a first stator winding, 6 is a second stator winding, 7 is a first rectifier circuit, 8 is a second rectifier circuit, 9 is a series-parallel switching circuit, 11 is a voltage adjustment circuit, 12 is a stand-even winding wire.

Claims (1)

[Scope of Claims] 1. A rotor winding provided on a rotor, a stator winding that generates alternating current voltages of each phase as the rotor rotates, and converting the alternating current voltages of each phase generated by the stator windings into direct current voltages. and a voltage adjustment circuit that supplies adjustment current to the rotor winding in order to adjust each phase AC voltage generated in the stator winding to a conductive value. , a plurality of sets of stator windings are provided, and each of the rectifier circuits is provided for each set of stator windings, and the rectifier circuits are connected in series for high voltage power generation or for low voltage power generation. A power generation device for a vehicle, characterized in that a series/parallel switching circuit is provided for switching each of the rectifier circuits to parallel connection.