KR900011171Y1 - Voltage controller for a magnetic generator - Google Patents

Abstract

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Description

Voltage control device for magnet generator

1 is a circuit diagram showing an embodiment of the present invention.

2A and 2B are waveform diagrams showing the operation waveforms of the respective parts at the low speed rotation and the high speed rotation, respectively, for the same example.

3 is a diagram showing load voltage versus rotational speed characteristics obtained by the embodiment.

4 is a diagram showing load voltage versus rotational speed characteristics obtained by a conventional apparatus.

5 is a circuit diagram showing the configuration of a conventional apparatus.

6A and 6B are waveform diagrams showing the operation waveforms of the respective parts at the low speed rotation and the high speed rotation with respect to the same apparatus.

* Explanation of symbols for main parts of the drawings

11: Generating coil of magnet generator 12: Load

13 voltage control device 14 thyristor (voltage control semiconductor switch)

15: trigger circuit 23: trigger signal output circuit

16: first capacitor 17: second capacitor

22: Zener Diode

The present invention relates to a voltage generator for a magnet generator for controlling to maintain the voltage supplied from the magnet generator to the load at a set value.

For a magnet generator which cannot avoid wide fluctuations in rotational speed, such as a magnet generator mounted on an internal combustion engine, it is necessary to install a voltage control device that controls the voltage applied to the load to be kept within a set range.

5 shows the structure of a conventional voltage generator for a magnet generator. In the same drawing, reference numeral 1 denotes a power generator coil of a magnet generator, and 2 a lamp as a load connected to both ends of the power generator coil. ) Is a voltage control device for controlling to maintain the voltage supplied from the generator to the load 2 at the set value.

The voltage control device 3 connects the positive electrode and the negative electrode to one end and the other end of the power generation coil 1, respectively, and the thyristor 4 as a voltage control semiconductor switch connected in parallel to the power generation coil 1. And from the trigger circuit 5 which triggers the thyristor 4 when the output voltage of the power generation coil 1 becomes equal to or higher than the set value.

The trigger circuit 5 includes a diode 6 having an anode connected to one end of the inverting coil 1, a resistor 7 connected to one end of the cathode of the diode 6, and the other end of the resistor 7 and a power generation coil. The negative electrode was connected to the condenser 8 connected between the other end of (1), the resistor 9 connected in parallel to both ends of the condenser 8, and the connection point between the condenser 8 and the resistor 7. Zener diode (10), the zener diode (

The anode of 10 is connected to the gate of the thyristor 4.

In the voltage control device shown in FIG. 5, when the power generation coil 1 induces a voltage of one half cycle of the polarity in the solid arrow direction in the drawing, the power generation coil 1 → diode

The current flows through the path of (6)-> resistance (7)-> condenser (8)-> power coil (1), and the capacitor (8) is charged to the polarity shown. When the output voltage of one of the power generation coils 1 exceeds the peak value, the charge of the capacitor 8 is discharged at a constant time constant through the resistor 9. When the output voltage of the generator becomes equal to or higher than the set value and the terminal voltage of the capacitor 8 becomes equal to or higher than the zener voltage of the zener diode 10, the zener diode 10 breaks down to apply a trigger signal to the die Lister 4.

Thereby, the thruster 4 conducts and short-circuits the power generation coil 1, and prevents the voltage (average value) applied to the load 2 from exceeding a set value.

6 (a) and 6 (b) show voltage waveforms of respective parts of the apparatus of FIG. 5 at low speed and high speed, respectively, in which V1 denotes the output of the power coil 1, respectively. The voltage V8 is the terminal voltage of the capacitor 8 and V2 is the zener voltage of the zener diode 10.

In the apparatus shown in FIG. 5, the charging of the capacitor 8 is performed only for one half cycle of the power generation coil 1, and the terminal voltage of the capacitor 8 is triggered during this one half cycle. In the above example, when the zener diode 10 reaches the zener voltage, the thyristors are made to conduct. Therefore, as shown in FIG. The output of half cycle of could not be shorted.

In this case, if the rated load is connected to the generator, the characteristics of the load sum (average value) EL for N during rotation are as shown in a of FIG. 4, and the load voltage is not excessive at high speed, but the load is light. In this case, as shown in b of FIG. 4, there is a problem that the voltage applied to the load 2 at high speed becomes high and the life of the load is shortened.

An object of the present invention is to prevent the voltage supplied to the load from becoming excessive during high speed rotation.

According to the present invention, the voltage control semiconductor switch and the output voltage of the magnet generator are connected in parallel between the output terminals of the magnet generator so that they can be triggered only when the output voltage of one half cycle of the inverter is applied to both ends. In the voltage control device for magnet reversals provided with a trigger circuit for triggering the semiconductor switch when the value is larger than the set value, the output of one half cycle of the generator can be completely shorted at high speed.

Therefore, in the present invention, as the trigger circuit, the first capacitor charged with the output voltage of the other half cycle of the magnet generator, the terminal voltage of the first capacitor, and the output of one reflective cable of the magnet generator are used. A trigger circuit is provided that includes a second capacitor charged with a voltage and applies a trigger signal to the semiconductor switch when the terminal voltage of the second capacitor reaches or exceeds a set value.

As described above, the first capacitor is charged with the output voltage of the other half cycle of the magnet generator, and the second capacitor is charged by the terminal voltage of the first capacitor and the output voltage of one half cycle of the magnet generator. If the trigger signal is applied to the semiconductor switch when the terminal voltage of the second capacitor reaches or exceeds the set value, the output voltage of the other half cycle of the generator of the second capacitor is charged since the peak. When the engine is rotating at high speed, the terminal voltage of the second capacitor becomes higher than the set value before the start of one half cycle of the output of the generator. Therefore, at the time of high speed rotation, the output of one half cycle of the generator is started and the semiconductor switch is triggered to conduct, and the output of one half cycle of the generator is completely shorted. Therefore, the output of the inverter can be prevented from being excessive at high speed rotation under light load, and the life of the load can be prevented from being shortened.

EXAMPLE

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

1 shows an embodiment of the present invention, in which the reference numeral 11 denotes a generator coil of a magnet generator, (12) a lamp as a load connected to both ends of the generator coil, and 13 a load 12 from the generator. It is a voltage control device that controls to maintain the voltage supplied to the set value.

The voltage control device 13 connects the positive electrode and the negative electrode to one end and the other end of the power generation coil 11, respectively, so that the thyristors 14 as the voltage control semiconductor switch transmitted in parallel with the power generation coil 11 and the power generation unit, It is made from the trigger circuit 15 which triggers the thyristor 14 when the output voltage of the coil 11 becomes more than a set value.

The trigger circuit 15 is composed of first and second capacitors 16 and 17, diodes 18 and 19, resistors 20 and 21 and zener diodes 22. It is.

In more detail, one end of the first capacitor 16 is connected to the cathode of the diode 18 in which the anode is connected to the cathode of the thyristor 14, and the other end of the capacitor 16 is connected to the resistor 20. It is connected to the positive electrode of the thyristor 14 through the interposition. One end of the second condenser 17 is connected to the cathode of the die Lister 14, and the other end of the second condenser 17 is connected to the first condenser via the diode 19 facing the cathode toward the condenser 17. 16) is connected to the positive electrode terminal (the terminal with the higher potential when charged). A resistor 21 is connected in parallel to both ends of the second capacitor 17, and a discharge circuit for discharging the second capacitor 17 at a constant time constant is configured by this resistor 21.

The cathode of the zener diode 22 is connected to the connection point of the second capacitor 17 and the cathode of the diode 19, and the anode of this zener diode 22 is connected to the gate of the die Lister 14. . In this embodiment, the trigger signal output circuit 23 which applies a trigger signal to the thyristor (voltage control semiconductor switch) 14 when the terminal voltage of the second capacitor 17 is set by the zener diode 22 or more. ) Is configured.

2 (a) and 2 (b) show the output voltage V11 of the power generation coil 11, the terminal voltage Vl6 of the first capacitor 10 and the terminals of the second capacitor 17 in the above embodiment. The waveform of the voltage V17 is displayed, and the same figure (a) shows the waveform at the low speed rotation, and the same figure (b) shows the waveform at the high speed rotation.

In the apparatus of FIG. 1, when the rotor of the magnet generator having the permanent magnet as a field rotates, the power generating coil 11 has one half cycle of the polarity in the solid arrow direction and the polarity in the dashed arrow direction. Outputs the voltage of the other half cycle of. When the power generation coil 11 outputs the voltage of the other half cycle, the power generation coil 11 → the diode 18 → the first capacitor 16 → the resistor 20 → the power generation coil 11 The capacitor 16 of 1 is charged to the polarity of the illustration. When the output of the other half cycle of the power generation coil 11 passes the peak, the first capacitor 16 → diode 19 → second capacitor 17 and resistor 21 → load 12 → resistance ( 20) → A current flows through the path of the first capacitor 16, and charging of the second capacitor 17 is started.

When the voltage of one half cycle of the power generation coil 11 starts to rise, the power generation coil 11 → resistance 20 → first capacitor 16 → diode 19 → second capacitor 17 → power generation. In the path of the coil 11, the second capacitor 17 is charged by both the output of the power generation coil 11 and the charge of the first capacitor 16. When the output voltage of the generator becomes equal to or higher than the set value, the second capacitor 17 and the terminal voltage become equal to or higher than the set value and the zener diode 22 breaks down. The charge of the second capacitor 17 is discharged between the gate ohmic poles of the zener diode 22 and the thyristor 14. As a result, a trigger signal is applied to the thyristor 14, and when the trigger signal is applied, if the output voltage of one half cycle of the power generation coil 11 is applied to the thyristor 14, the thyristor 14 Conducts and shorts the power generation coil 11. In low-speed rotation, the terminal voltage of the second capacitor 17 reaches the zener voltage of the zener diode 22 in the period of one half cycle of the power generation coil 11, and thus is shown in FIG. As described above, the terminal voltage of the second capacitor 17 becomes equal to or higher than the set value in one half cycle (negative half cycle shown in the drawing) of the power generation coil 11.

Therefore, a part of the output of one half cycle of the power generation coil 11 is short-circuited, and the output voltage of the power generation coil is maintained at a set value. On the other hand, at the time of light high speed rotation, as shown in FIG.2 (b), the terminal voltage other than the 2nd capacitor | condenser 17 becomes more than the zener voltage V2 of the zener diode 22 between electricity.

Therefore, the output voltage of one half cycle of the power generation coil is started and the thyristor 14 is triggered and conducts, and the half-cycle inter-generator of the power generation coil is conducting, and the output voltage of the power generation coil is conducted. Short circuit. Therefore, the voltage applied to the load at the time of high rotation becomes excessive and the life of the load can be prevented from being shortened.

The characteristics of the load voltage EL with respect to the rotational speed N when the voltage control device of the present invention is used are the same as those in FIG. 3, in the same drawing, a denotes a characteristic of rated load, and b denotes a characteristic of light load. Was displaying.

In the above embodiment, the trigger signal output circuit 23 is constituted by the zener diode 22. However, this circuit uses a semiconductor switch (in the above example, when the terminal voltage of the second capacitor 17 is above the set value). A circuit for applying a trigger signal to the thyristor). For example, when the second capacitor 17 and the terminal voltage become equal to or higher than the reference voltage by comparing the terminal voltage of the second capacitor 17 with the reference voltage. The trigger signal output circuit may be configured by a comparison circuit that applies a trigger signal to (14).

In the above embodiment, the trigger signal output circuit 23 is installed in order to apply a trigger signal when the terminal voltage of the second capacitor 17 is equal to or higher than the set value. It is not necessary to install the trigger signal output circuit when using a semiconductor switch which is not in a doped state unless a high voltage is applied to the control signal input terminal of the switch.

As described above, according to the present invention, the first capacitor is charged with the output voltage of the other half cycle of the magnet generator, and the terminal voltage of the first capacitor and the output voltage of one half cycle of the magnet generator are used. Since the second capacitor was charged and a trigger signal was applied to the semiconductor switch when the terminal voltage of the second capacitor became equal to or higher than the set value, since the output voltage of the other half cycle of the generator passed the peak, The two capacitors can be charged, and at the time of high speed rotation of the engine, the terminal voltage of the second capacitor can be set above the set value before the start of one half cycle of the output of the generator.

Therefore, at high speed rotation, the output of one half cycle of the generator is started to rise and at the same time, the semiconductor switch is triggered to conduct, and the output of one half cycle of the generator can be completely shorted. Therefore, there is an advantage that it is possible to prevent the generator output from becoming excessive at light and high speeds, and to prevent the life of the load from being shortened.

Claims (5)

The voltage control semiconductor switch which is connected in parallel between the output terminals of the magnet generator so that it can be triggered only when the output voltage of one half cycle of this generator is applied to both ends, and the output voltage of the magnet generator has exceeded the set value. A voltage generator for a magnet generator comprising a trigger circuit for triggering the semiconductor switch at a time, wherein the trigger circuit comprises: a first capacitor charged with an output voltage of another half cycle of the magnet generator; A second capacitor charged by the terminal voltage of the capacitor of 1 and the output voltage of one half cycle of the magnet generator, and triggering the trigger signal to the semiconductor switch when the terminal voltage of the second capacitor becomes equal to or higher than a set value. Voltage generator for magnet generator, characterized in that for applying a. 2. The voltage control device for a magnet generator according to claim 1, wherein said voltage control semiconductor switch is made of a thyristor. 3. The cathode of the thyristor according to claim 2, wherein one end of the first capacitor is via a diode in a direction in which forward current flows when an output voltage of the other half cycle of the magnet generator is applied. And the other end of the first capacitor is connected via a resistor to the anode of the diester, and one end of the second capacitor is connected to the cathode of the diester, and the other end is the cathode. The voltage control device for magnet generators connected to the terminal of the positive electrode side of the said 1st capacitor via the diode toward the capacitor side of the said 1st capacitor | condenser. 4. The trigger circuit according to any one of claims 1 to 3, wherein the trigger circuit is installed between one end of the second capacitor and the gate of the thyristor, and the conductive circuit is turned on when the terminal voltage of the second capacitor reaches a predetermined level. A voltage control device for a magnet generator having a zener diode. 5. The voltage control device for a magnet generator according to any one of claims 1 to 4, wherein the trigger circuit includes a discharge circuit made of a resistor connected in parallel to both ends of the second capacitor.