JPS62110484A - Inverter - Google Patents

Abstract

PURPOSE:To reduce the size of a transformer by transforming a voltage after a DC voltage is converted into a high frequency voltage. CONSTITUTION:A DC voltage supplied from a battery 1 is converted by an oscillator 2 into a high frequency voltage interrupted at a period of 25kHz and supplied to a transformer 3a. The supplied high frequency voltage is transformed into a predetermined voltage and outputted by the transformer 3a. The transformed voltage is rectified by diodes 3b-3e and charges capacitors 3h and 3i. The charging voltages of the capacitors 3h and 3i are supplied to transistors 4a and 4b. The transistors 4a and 4b are turned ON and OFF alternately by signals from an oscillator 4c and a voltage at a frequency of 500HZ is supplied to a load 5.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an inverter device that generates a repetitive signal having a predetermined voltage based on a DC input voltage.

[Conventional technology]

Generally, trains are equipped with a 100 volt DC power source, and this power is supplied to various devices. On the other hand, in trains where multiple cars are connected, it is necessary to control and monitor the status of each car in the driver's cab or conductor's room. By using a voltage whose polarity is inverted in synchronization with a clock signal, the device can be simplified. Conventionally, to generate this voltage, a DC voltage is interrupted in synchronization with a clock signal, and this interrupted voltage is transformed and output.

[Problem that the invention seeks to solve]

However, since the frequency of the clock signal is on the order of several kilohertz, it has the disadvantage that the transformer becomes large.

[Means for solving problems]

In order to solve these drawbacks, the present invention uses a high frequency voltage to be supplied to the transformer.

[For production]

After the direct current is converted to high frequency, it is transformed and rectified, and the polarity of the rectified output is reversed at a predetermined period.

〔Example〕

FIG. 1 is a circuit diagram showing one embodiment of the present invention. In the figure, 1 is a battery, 2 is an oscillator that converts direct current into a high frequency, 3 is a rectifier that converts the high frequency generated by the oscillator 2 into a predetermined DC voltage, and 4 is the polarity of the output voltage of the rectifier 3. Reference numeral 5 represents a load, which is a polarity reversing unit that reverses the polarity at a predetermined period.

The rectifying section 3 includes a transformer 3m, diodes 3b to 3, choke coil 3f, 3t% capacitor 3h, 3t.
It consists of The polarity reversing part 4 is a transistor 4aH
4b% It is composed of an oscillating section 4C that generates a signal to turn on and off the transistors 4m and 4b alternately. Note that the oscillation unit 2 has a frequency of 25 KHz, and the oscillation unit 4c
is configured to oscillate such that the voltage supplied to the load 5 is 500 Hz.

In the device configured in this way, the oscillation section 2 is connected to the battery 1.
The voltage supplied from the converter 31 is made into a high frequency voltage that is intermittent at a period of 25 KHz, and is supplied to the transformer 31.

The transformer 31 transforms the supplied high frequency voltage to a predetermined voltage and outputs it, but the frequency handled by the transformer 3& is 25.
Since it is a high frequency of KHz, it is 5o.

The transformer can be made much smaller than when dealing with the lz frequency.

The transformed voltage is rectified by diodes 3b to 3e, and charges capacitors 3h and 3t to the polarities shown in the figure. At this time, the capacitor 3h is charged by the voltage rectified by the diodes 3b and 3a, and the capacitor 3h is charged by the voltage rectified by the diodes 3b and 3a.
1 is charged by a voltage rectified by diodes 3d and 3e. The voltages charged in these capacitors are supplied to transistors 4a t 4b, and these transistors are alternately turned on and off by signals supplied from oscillation section 4c. As a result, when transistor 4& is turned on, current flows through the path shown by the solid line in the diagram due to the voltage charged in capacitor 3h, and when transistor 4b is turned on, current flows due to the voltage charged in capacitor 31. Current flows through the path shown by the dotted line in the figure. Therefore, the load 5 is supplied with a voltage having a frequency of 500 Hz as shown in FIG.

〔Effect of the invention〕

As explained above, in this invention, the DC voltage is converted to a high frequency and then transformed, so the frequency handled by the transformer is much higher than that of the conventional one, and therefore the shape of the transformer can be made smaller. It has the effect of being able to.

[Brief explanation of drawings]

Fig. 1 is a circuit diagram showing an embodiment of the present invention, and Fig. 2 is a diagram showing the waveform of the voltage supplied to the load. ... Rectifier section, 4.φ.. Pole reversing section, 5.. Load.

Claims (1)

[Claims] An inverter device that converts DC input voltage into a repetitive signal and outputs it includes an oscillation unit that converts DC to high frequency, a rectification unit that converts this high frequency to DC voltage of a predetermined voltage, and a polarity of the output voltage of the rectification unit that is set in a predetermined manner. An inverter device comprising: a polarity reversing section that inverts and outputs the output at a period of