JPH047677Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a power generation frequency switching device for switching the power generation frequency of a motor generator.

A motor generator is known that is capable of generating power at 50 Hz and 60 Hz, and allows the user to select and use either of them. In conventional motor generators of this type, the operating conditions of the engine are
Since the means for setting the generator to 50Hz or 60Hz and the means for setting the operating conditions of the generator to 50Hz or 60Hz are provided separately, the operation is complicated.
There was a possibility of erroneous operation.

For example, the generator is wired for 50Hz, and the engine is wired for 60Hz.
When set for Hz, the voltage increases abnormally.
In the opposite case, if you run the engine at 50Hz with a 60Hz connection, you will only get a low voltage and will not be able to supply enough power.

Especially in the former case, if the engine is operated at 60Hz with a 50Hz connection, there is a risk of damaging the generator. However, in a power generator using an automatic voltage stabilizer (AVR), when switching the generation frequency,
Some devices do not require circuit switching and can switch frequencies simply by changing the engine speed.

However, such a configuration requires sufficient output power and an expensive AVR. Even when using AVR, it is preferable to switch the circuit connections according to each frequency.

The purpose of the present invention is to provide an improved generation frequency switching device for a motor generator that solves the above-mentioned problems by making it possible to switch the engine operation and switch the circuit in a single operation. be.

In order to achieve the above object, the power generation frequency switching device according to the present invention changes the power generation frequency of the motor generator to obtain the first and second power generation frequencies by switching the circuit between the centrifugal governor that adjusts the rotational speed of the engine and the generator. The switching device includes: a governor lever provided on the governor shaft and having one end interlocked with the carburetor; a circuit changeover switch that changes the circuit of the generator to a circuit that obtains the first and second power generation frequencies; and the circuit changeover switch. a frequency switching lever that is provided coaxially and switches the contacts of the circuit switching switch when operated; and a first and second frequency switching lever that contacts one end of the lever when the frequency switching lever is operated. 2; and a tension of a spring connected between the other end of the frequency switching lever and the other end of the governor lever to obtain the rotational speed of the engine selected by the switching position of the frequency switching lever. It is configured with a governor spring that is automatically set.

According to the above structure, the object of the present invention can be completely achieved.

The apparatus according to the present invention will be described in more detail below with reference to the drawings and the like.

1 and 2 are perspective views showing an embodiment of the device according to the present invention.
The figure is shown at 60Hz.

Further, FIG. 3 is a side view showing the changeover switch portion, and FIG. 4 is a circuit diagram showing an embodiment of the generator circuit.

A governor lever 1 is integrally provided with a governor shaft 2 and rotatably supported within the device.

A carburetor drive rod 7 is provided at the upper end of the governor lever 1. The other end of this carburetor drive rod is engaged with a carburetor throttle lever 8, and the carburetor throttle lever 8 is moved up and down by rotation of the governor lever 1.

A governor arm 9 is integrally provided on the governor shaft 2, and the governor arm 9 is located at a position where a force F generated by the centrifugal force of a weight attached to a rotating body of the engine acts on the governor arm 9.

The frequency switching lever 4 is connected to the frequency switching lever shaft 5
The lower end of the lever 4 is provided so as to be operable from the outside of the motor generator. Reference numerals 6 and 6' indicate position regulating members that regulate the rotation range of the lever 4. The upper end of the frequency switching lever 4 and the lower end of the aforementioned governor lever 1 are connected by a governor spring 3, and the angular position of the governor lever 1 is determined by the balanced position of the aforementioned force F and the spring 3. On the other end side of the frequency switching lever shaft 5,
A contact piece 11C of the changeover switch 11 is provided. Note that this contact piece 11C and the shaft 5 are insulated. The insulating disc of the switch 11 has a contact 11A.
(50Hz) and 11B (60Hz), and the contact piece 11C is switched and connected to 11A or 11B by operating the frequency switching lever 4 from the outside.

The operation of the apparatus having the above configuration is as follows.
During the 50Hz operation shown in FIG. 1, the contact piece 11C is connected to the contact 11A side. The frequency switching lever 4 is at its limit position in the counterclockwise direction, and the angle of the governor lever 1 is determined by the balance between the tension of the spring 3 and the force F exerted on the governor arm 9 by the weight of a rotating body (not shown).

This determines the position of the carburetor throttle lever 8 and adjusts the carburetor.

In the generator circuit, a 50 Hz circuit connection state is formed by connecting the contact piece 11C and the contact point 11A. Next, as shown in FIG. 2, when the frequency switching lever 4 is rotated clockwise, the contact piece 11C is switched to the contact point 11B, the generator circuit is switched to the 60Hz side, and the spring 3 is stretched. The rotation speed during equilibrium increases from 50Hz to 60Hz. FIG. 4 is a circuit diagram showing a generator and an example of its connection.

In this embodiment, AC voltages of 50 Hz and 60 Hz and low DC voltages can be extracted. The above-described switch 11 is configured to change the number of turns of a coil connected to an automatic voltage regulator (AVR).

As explained in detail above, according to the present invention, with a single operation of the lever 4, it is possible to switch the engine speed and switch the generator side electric circuit at the same time, and there is no room for mistaken operation. Summer.

Although the embodiments have been described in detail above, various modifications can be made to the structure of the frequency switching lever and the switch. Although a rotary type switch is shown as an example, it may be shaped like a slide switch and a governor spring may be connected to the operating member of the switch.

[Brief explanation of the drawing]

1 and 2 are perspective views showing an embodiment of the frequency switching device according to the present invention, and FIG.
Hz position, Figure 2 is shown at 60Hz position.
Figure 3 is a side view showing the changeover switch part, Figure 4
The figure is a circuit diagram showing an example of a generator and its circuit connections. 1...Governor lever, 2...Governor shaft, 3...
Governor spring, 4...Frequency switching lever, 6, 6'
...Position limiting member, 7...Carburetor interlocking rod, 8...Carburetor throttle lever, 9...
...Governor arm, 11...Circuit selection switch.

Claims (1)

[Scope of Claim for Utility Model Registration] A power generation frequency switching device for a motor generator that obtains first and second power generation frequencies by switching circuits between a centrifugal governor that adjusts the engine speed and a generator, which is provided on the governor shaft 2. a governor lever 1 whose one end is interlocked with the carburetor; a circuit changeover switch 11 which changes the circuit of the generator to a circuit that obtains the first and second power generation frequencies; a frequency switching lever 4 that switches the contacts of the circuit switching switch 11 when the frequency switching lever 4 is operated; and a frequency switching lever 4 that contacts one end of the lever when the frequency switching lever 4 is operated
a position regulating member 6, 6' that defines first and second rotational positions of the frequency switching lever 4; 1. A power generation frequency switching device for a motor generator, characterized in that a governor spring 3 is provided to automatically set the tension of a spring that obtains the rotational speed of the engine.