JPH0591179U - Generator voltage display - Google Patents

Abstract

(57) [Abstract] [Purpose] A generator capable of switching the output voltage between high and low levels by connecting a pair of armature windings in series or in parallel without using a special display control circuit. The output voltage can be automatically displayed. [Structure] If terminals X1 and U2 are connected on the terminal board 2, the armature windings La1 and La2 are connected in series, and the output voltage becomes high, so that the terminals O and X1 and the terminal U1 are connected.
In the generator in which the armature windings La1 and La2 are connected in parallel by connecting U2 and U2 respectively and the output voltage becomes low,
The low-voltage indicator lamp PL1 is connected between the terminal X1 and the terminal U2 connected at the time of high-voltage output, and the high-voltage indicator lamp PL2 is connected between the terminal O and the terminal X1 connected at the time of low-voltage output. As a result, the high-voltage indicator lamp PL2 lights up when the generator outputs high voltage, and the low-voltage indicator lamp PL1 lights up when the generator outputs low voltage.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a voltage display device of a generator used to indicate whether the output voltage is high voltage or low voltage in a generator capable of switching an output voltage between high voltage and low voltage.

[0002]

[Prior Art]

 Conventionally, a portable generator used in construction work, etc., has a pair of armature windings wound around an armature, and by connecting each armature winding in series or in parallel, a high output voltage ( For example, it can be switched to either 400 V) or low voltage (eg 200 V).

Further, the output voltage is switched by switching the connection state of each terminal with a copper plate or the like on a terminal board (terminal board) on which terminals connected to both ends of each armature winding are fixed. It is done by On the other hand, the terminal board to which the terminals of each armature winding are fixed is hidden on the back surface of the control panel or the like so that an operator does not touch it by mistake. Therefore, in the conventional generator, its output voltage cannot be visually confirmed from the connection state of the armature winding, and in order to be able to confirm the output voltage, a voltage indicator lamp is installed on the control panel etc. It is set separately.

[0004]

[Problems to be solved by the device]

 However, in the conventional generator, since a manual switching indicator lamp using a battery as a power source was used for this voltage indicator lamp, it was necessary to switch the lighting state of the voltage indicator lamp separately from the voltage switching work.

For this reason, it is easy to forget to switch the voltage indicator lamp, and due to forgetting to switch it, it becomes impossible to drive the device at a normal voltage, and in some cases, the high voltage is supplied to the low voltage device, causing a device failure. There was a problem that was invited. On the other hand, in recent years, in order to solve these problems, the output voltage of the generator is detected, and a comparator is used to automatically determine whether the detected voltage is high voltage or low voltage. A voltage display device that automatically switches the lighting state has been considered. However, in such a voltage display device, a display control circuit including a voltage detection circuit, a comparator, and the like must be specially provided, and there is a problem that the device configuration becomes complicated and expensive.

The present invention has been made in view of these problems, and provides a voltage display device for a generator that can automatically display the output voltage of the generator without using a special display control circuit. The purpose is to

[0007]

[Means for Solving the Problems]

 That is, the present invention made to achieve the above object includes a pair of armature windings wound around an armature, and a terminal board having terminals respectively connected to both ends of the armature windings. , A generator in which the output voltage can be switched between high voltage and low voltage by switching the connection state of each terminal on the terminal board and connecting the armature windings in series or in parallel. Is a voltage display device for indicating whether the output voltage of the armature is high voltage or low voltage, which is a low voltage indicator lamp between a pair of terminals connected on the terminal board when the armature windings are connected in series. And a high-voltage indicator lamp is connected between a pair of terminals connected on the terminal board when the armature windings are connected in parallel.

[0008]

[Action]

 As described above, in the voltage display device of the generator of the present invention, the low-voltage indicator lamp is connected between the pair of terminals connected on the terminal board when the armature windings are connected in series, and the high-voltage indicator lamp is connected to each terminal. It is connected between a pair of terminals that are connected on the terminal board when the armature windings are connected in parallel.

For this reason, when the armature windings are connected in series and the output voltage of the generator becomes high, the voltage is applied only to the high-voltage indicator lamp, and the high-voltage indicator lamp lights up. When the wires are connected in parallel and the output voltage of the generator becomes low, the voltage is applied only to the low-voltage indicator lamp and the low-voltage indicator lamp lights up.

[0010]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings. The voltage display device of the present embodiment is provided in a three-phase AC generator that can select the output voltage from a low voltage of 200 V and a high voltage of 400 V, and the output voltage is low voltage (200 V) or high voltage. This is for displaying whether it is (400V).

As shown in FIG. 3, the three-phase AC generator is provided with a pair of armature windings (La1 and La2, Lb1 and Lb2, Lc1 and Lc2) on the armatures of the respective phases a, b and c. As shown in FIG. 2, a terminal board 2 is provided which has 12 terminals connected to both ends of each of the phase windings La1 to Lc2 and arranged at equal intervals for each phase. ..

Each terminal arranged on the terminal board 2 is composed of bolts, washers, nuts, etc., as shown in FIG. Of these 12 terminals, the terminals U1 and X1, the terminals V1 and Y1, and the terminals W1 and Z1 shown in FIG. 2 are respectively on the back surface of the terminal board 2 for one of the phases a, b, and c. The child windings La1, Lb1, and Lc1 are connected to both ends, respectively. Similarly, the terminal U2, the terminal V2, and the terminal W2 are connected to one ends of the other armature windings La2, Lb2, and Lc2 of the phases a, b, and c, respectively, and the three terminals O are respectively The armature windings La2, Lb2, and Lc2 are connected to the other ends.

As shown in FIG. 2, these three terminals O are connected to each other by a conductive plate 4 made of copper or the like on the terminal board 2. In the three-phase AC generator configured in this way, as shown in FIG. 2 (a), on the terminal board 2, the plate 6 is used to connect the terminals X1 and U2, the terminals Y1 and V2, and the terminals Z1 and W2. If they are respectively connected, as shown in FIG. 3 (a), the electric wire windings La1 and La2, Lb1 and Lb2, Lc1 and Lc2 of the phases a, b and c are respectively connected in series, The output voltage becomes high voltage.

Further, as shown in FIG. 2B, on the terminal board 2, by using the plate 6, terminals O and X1, terminals U1 and U2, terminals O and Y1, terminals V1 and V2, terminals O and Z. 1. If the terminals W1 and W2 are connected to each other, as shown in FIG. 3B, the armature windings La1 and La2, Lb1 and Lb2, Lc1 and Lc2 of the phases a, b and c are respectively Connected in parallel, the output voltage is low.

Next, as shown in FIG. 1, the terminal board 2 controls the terminal board 2 for inputting various control commands such as driving / stopping of the generator and rotation speed so that the user does not touch it by mistake. The control panel 8 is covered with the panel 8, and when the output voltage of the generator is switched as described above, the control panel 8 is removed from the generator.

Further, as shown in FIG. 1, the control panel 8 has a low-voltage indicator light PL1 that lights up when the output voltage of the generator is low, and a low-voltage indicator light PL1 when the output voltage of the generator is high. And a high voltage indicator light PL2. Each of these indicator lights PL1 and PL2 is a well-known one which is lit by receiving an AC voltage. As shown in FIG. 1, the low voltage indicator light PL1 is connected to the rear surface of the terminal board 2 by the plate 6 at the time of high voltage output. The high pressure indicator lamp PL2 is connected between the terminal X1 and the terminal U2, and is connected between the terminal O and the terminal X1 which are connected by the plate 6 at the time of low voltage output on the rear surface of the terminal board.

Therefore, as shown in FIG. 1A, at the time of high-voltage output of the generator in which the terminal X1 and the terminal U2 are connected by the plate 6, the high-voltage indicator lamp PL2 outputs the output from the armature winding La2. The voltage is applied, the high-voltage indicator lamp PL2 is turned on, and the low-voltage indicator lamp PL1 is turned off.

On the contrary, as shown in FIG. 1 (b), at the time of low-voltage output of the generator in which the terminals O and X1 and the terminals U1 and U2 are respectively connected by the plate 6, the low-voltage indicator lamp PL1 is connected in parallel. The output voltages from the armature windings La1 and La2 are applied, the low-voltage indicator lamp PL1 is turned on, and the high-voltage indicator lamp PL2 is turned off.

As described above, in the voltage display device according to the present embodiment, the low-voltage indicator lamp PL1 and the high-voltage indicator lamp PL2 are connected by the plate 6 at the time of high-voltage output among the terminals of the armature windings La1 and La2. And the terminals connected by the plate 6 during low-voltage output, the lighting states of the respective indicator lights PL1, PL2 are automatically switched according to the switching state of the output voltage of the generator. Is being done.

Therefore, unlike the conventional case, it is not necessary to manually switch the lighting states of the indicator lights PL1, PL2, and it is possible to prevent malfunction of the device or failure of the device due to forgetting to switch the display. Further, since a control circuit for automatically switching between the indicator lights PL1 and PL2 is unnecessary, it can be realized easily and at low cost.

The present invention is not limited to the above-mentioned embodiments, and various modes can be adopted without departing from the scope of the invention. For example, in the above embodiment, the case where the present invention is applied to a three-phase AC generator has been described. be able to.

[0022]

[Effect of the device]

 As described above, in the voltage display device of the present invention, the low voltage indicator lamp and the high voltage indicator lamp are connected between the terminals of the armature winding connected at the time of high voltage output and the terminals of the armature winding connected at the time of low voltage output. By connecting each of them in between, the lighting state of each indicator lamp is automatically switched according to the switching status of the generator output voltage. Therefore, unlike the conventional case, it is not necessary to manually switch the lighting state of each indicator lamp, and it is possible to prevent malfunction of the device or failure of the device due to forgetting to switch the display. Further, since a control circuit for automatically switching the lighting state of each indicator lamp is not required, it can be realized easily and at low cost.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing a connection state of an armature winding of a generator, terminals of the armature winding, and an indicator lamp.

FIG. 2 is an explanatory diagram showing a terminal of an armature winding provided on a terminal board and a connection state of each terminal.

FIG. 3 is an explanatory diagram showing a connection state of armature windings of a generator.

[Explanation of symbols]

2 ... Terminal board 4, 6 ... Plate 8 ... Control board La1, La2, Lb1, Lb2, Lc1, Lc2 ... Armature winding PL1 ... Low voltage indicator light PL2 ... High voltage indicator light

Claims (1)

[Scope of utility model registration request] 1. A pair of armature windings wound around an armature, and a terminal board having terminals respectively connected to both ends of the armature winding, and connection of each terminal on the terminal board. In a generator in which the output voltage can be switched between high voltage and low voltage by switching the states and connecting the armature windings in series or in parallel, the output voltage of the generator is either high voltage or low voltage. A voltage display device for indicating whether the armature windings are connected in series, and a low-voltage indicator lamp is connected between a pair of terminals connected on the terminal board, and the armature windings are connected in parallel. A voltage display device for a generator, characterized in that a high-voltage indicator lamp is connected between a pair of terminals that are sometimes connected on the terminal board.