JP2000041399A - Engine generator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an engine generator capable of connecting a battery or a load which is separate body from it to a single generating coil, without using a separate generating coil or a multipolar generating coil or the like. SOLUTION: This engine generator moves a magnet rotor disposed facing a generating coil by the drive force of an engine to generate power at the coil. The generator comprises first and second output terminals (a), (b) connected via both ends of the coil, a third output terminal connected from the terminal (a) to the terminal (b), a battery B connected from the first terminal (a) to a third output terminal (c), and a predetermined load Z2 connected from the terminal (a) to the terminal (B), thereby compensating a supply voltage V1 lowered via a connection to the battery B by a voltage V2 generated between the terminals (b) and (c).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an engine generator in which a magnet rotor is rotated by using the driving force of an engine to generate electric power in a generating coil.

[0002]

2. Description of the Related Art At present, in a generator of this type, when a crankshaft rotates by driving an engine, a magnet rotor attached to the crankshaft rotates,
The power generation magnet fixed to the magnet rotor rotates and moves in opposition to the power generation coil, and changes the magnetic flux density of the power generation coil to induce electromotive force in the power generation coil. Then, as shown in FIG.
Are connected to a battery B and other load Z.
2 are connected in parallel, and a voltage Vo generated at each output terminal a, b is supplied to the load Z2.

[0003]

By the way, in the above-mentioned conventional generator, the voltage generated between both terminals a and b of the power generating coil is smooth as shown in FIG. Battery sine wave shape
Is connected, the voltage Vo between the terminals a and b in the power generation coil CO becomes a state in which the vicinity of the peak voltage is cut off by the battery voltage VO as shown by the broken line in FIG. However, there is a problem that a necessary and sufficient voltage is not supplied to the device.

Therefore, as a means for solving the above problem, it has been considered that the coil CO1 connected to the battery B and the coil CO2 connected to the other load Z2 are formed separately. That is, two rod-type power generation coils Co as shown in FIG. 7 are prepared, and as shown in the circuit diagram of FIG. 8, the battery B is connected to one coil CO1 and the load Z2 is connected to the other coil CO2. Is thought to be. As another means, a multi-pole type power generating coil CO3 having an iron core as shown in FIG.
It has been proposed and implemented to connect multiple loads to this. However, in either case, there is a problem that the cost becomes high or the wiring becomes complicated, and thus, the function and the economical efficiency are not combined.

The present invention has been made in view of the above-mentioned problems of the prior art, and it is possible to connect a battery to other loads without using a separate power generation coil or a multi-pole type power generation coil. The purpose is to provide an engine generator that can be used.

[0006]

According to the present invention, there is provided an engine generator in which power is generated in a power generating coil by moving a magnet rotor arranged opposite to the power generating coil by driving force of an engine. A first output terminal connected between both ends of the coil, and a third output terminal connected between the first and second output terminals; the first and third output terminals A battery is connected between the first and second output terminals, and a predetermined load is connected between the first and second output terminals. The supply voltage reduced by the connection of the battery is reduced to a voltage generated between the second and third output terminals. Compensation.

In the above invention, when a battery is connected between the first and third output terminals and another load is connected between the first and second terminals, the first and third output terminals are connected. The induced output voltage is cut by the battery voltage, but the other load has a voltage generated between the first and second terminals,
That is, a voltage is obtained by adding the voltage between the first and third output terminals to the voltage between the second and third terminals.
If the voltage between the third terminals is set to an appropriate value, the voltage can supply a necessary and sufficient voltage to the load.

[0008]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a partially cut-away side view of an engine generator according to an embodiment of the present invention, FIG. 2 is a longitudinal sectional front view showing a peripheral structure of a magnet rotor shown in FIG. 1, and FIG. 3 is a generating coil used in the embodiment. FIG. 4 is a diagram showing a circuit configuration according to an embodiment of the present invention.

1 and 2, an engine generator 1 according to this embodiment includes an engine unit E and a generator unit G that generates electric power by driving the engine unit E. And the engine unit E
Is an engine body 2 having a cooling fan cover 2a, a cylinder 2b, a cylinder head 2c, a cylinder head cover 2d, etc., a fuel tank 3 for storing fuel to be supplied to the engine body 2, and air for filtering outside air into clean air. A cleaner 4, a carburetor 5 for supplying a mixture of air from the air cleaner 4 and fuel from the fuel tank 3 to the engine body 2, and purifying and discharging exhaust gas discharged from the cylinder head 2c. By operating a starter (not shown), an ignition magnet 8 moves together with a magnet rotor 7 described below,
A voltage is induced in the ignition coil 9, a spark plug (not shown) is ignited, and the engine unit E is driven.

The generator section G includes a circular dish-shaped magnet rotor 7 fixed to a crankshaft 2a1 rotatably supported by the engine body 2.
A power generating magnet 10 fixed to the inner peripheral surface of the magnet rotor 7, a power generating coil 12 disposed opposite to the power generating magnet 10, and a recoil starter fixed to the outer end of the crankshaft 2a1. A pulley 13 and the like are provided, and these are covered by a fan cover 14 fixed to a cylinder of the engine body 2.

As shown in FIG. 3, the power generating coil 12 is formed by winding a conductive wire 12b around a rod-shaped iron core 12a, and a lead wire 12c is provided at both ends and an intermediate position, respectively. Connected, each lead wire 12
Output terminals a, b, and c are connected to c. A battery B having a load Z1 and another load Z2 are connected to output terminals a, b, and c of the power generation coil 12, as shown in FIG. That is, the battery B is connected between the first output terminal a and the third output terminal b,
A load Z2 is connected between the first output terminal a and the second output terminal c.

In the embodiment configured as described above, the crankshaft 2a1 is now rotated by the driving of the engine unit E, and when the magnet rotor 7 is rotated by the rotation of the crankshaft 2a1, the crankshaft 2a1 is provided on the magnet rotor 7. By moving the power generating magnet 10,
A voltage is generated in the power generating coil 12 opposed thereto, and the voltage is applied to the battery B and the load Z2. At this time, the voltage between the output terminals a and b is lower than the voltage in the no-load state where the battery B is not connected, as shown in FIG.
The vicinity of the peak voltage is cut off.

However, a voltage between the output terminals a and c is applied to the load Z2, and the voltage can be a sufficient voltage according to the load Z2. That is, the voltage applied to the load Z2 is equal to the output terminals a and b.
Since the voltage V1 is obtained by adding the voltage V1 generated between the output terminals b and c to the voltage V1, the voltage V1
Even if the vicinity of the peak voltage is a voltage cut as shown in FIG.
Is applied as a compensation voltage, and if this compensation voltage is set in advance in accordance with the magnitude of the load Z2, a sufficient voltage corresponding to the magnitude of the load Z2 can be reliably supplied.

As described above, according to the above-described embodiment, a sufficient voltage is supplied to the battery B and the other load Z2 by using the single rod-type power generation coil 12 which can be configured at a low cost. And the manufacturing cost can be greatly reduced. However, the present invention is not limited to the rod-type power generation coil 12 as in the above-described embodiment, but may be applied to other coils. In the above embodiment,
A power generation coil 12 is disposed inside the magnet rotor 7,
The case where the power generating magnet 10 is disposed on the inner peripheral surface of the magnet rotor 7 has been described as an example. However, the power generating coil is disposed outside the magnet rotor and is opposed to the power generating magnet fixed to the outer peripheral surface of the magnet rotor. However, the present invention is not particularly limited to the above embodiment.

[0015]

As described above, in the engine generator according to the present invention, the first and second outputs are provided at both ends of the power generation coil disposed opposite to the magnet rotor which is rotated by the driving force of the engine. A terminal is connected, a third output terminal is connected between both terminals, a battery is connected between the first and third output terminals, and a predetermined output terminal is provided between the first and second output terminals. A load is connected, and a supply voltage reduced by the connection of the battery is compensated for by a voltage generated between the second and third output terminals. Therefore, a battery and other loads are connected to a single power generation coil. Can supply enough voltage to other loads,
Manufacturing costs can be significantly reduced.

[Brief description of the drawings]

FIG. 1 is a partially cutaway side view of an engine generator according to an embodiment of the present invention.

FIG. 2 is a longitudinal sectional front view showing a peripheral structure of a magnet rotor shown in FIG.

FIG. 3 is a side view showing an example of a power generation coil used in the embodiment.

FIG. 4 is a diagram illustrating a circuit configuration according to an embodiment of the present invention.

FIG. 5 is a circuit diagram showing a connection example of power generation coils in a conventional engine generator.

FIG. 6 is a diagram showing an output voltage waveform of a generating coil;
(A) shows the output voltage waveform of the power generation coil when the battery is not connected, and (b) shows the output voltage waveform of the power generation coil when the battery is connected.

FIG. 7 is an explanatory view showing the appearance of a rod-shaped power generation coil.

FIG. 8 is a circuit diagram showing a connection example of a power generation coil in a conventional engine generator.

FIG. 9 is a partial side view showing an iron core of a conventional multipolar power generation coil.

[Explanation of symbols]

 7 Magnet rotor 12 Power generation coil a First output terminal b Second output terminal c Third output terminal E Engine B Battery Z2 Load

Claims (1)

[Claims] 1. An engine generator in which a magnet rotor arranged opposite to a power generating coil is moved by a driving force of an engine to generate electric power in the power generating coil. A first output terminal, a third output terminal connected between the first and second output terminals, and a battery connected between the first and third output terminals; A predetermined load is connected between the first and second output terminals, and a supply voltage reduced by the connection of the battery is compensated for by a voltage generated between the second and third output terminals. Characteristic engine generator.