JPH03145999A - Power feeder - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Summary] The present invention relates to a power supply device in which the energy of a generator is converted by a power conversion device, such as a bridge type inverter or a step-down chopper regulator, having a plurality of control semiconductor elements.

The purpose is to easily realize multiple independent power supplies necessary for using voltage-driven semiconductor elements such as FETs as control elements.

An independent power generation winding is provided, and the configuration includes the power generation winding, a rectifier circuit section, and a voltage stabilization section.

[Industrial application field]

The present invention relates to a power supply device in which the energy of a generator is converted by a power conversion device having a control semiconductor element, such as a bridge type inverter or a step-down chopper regulator.

[Conventional technology]

INDUSTRIAL APPLICATION This invention is utilized, for example, to improve the power supply part for the control semiconductor element of Japanese Patent Application No. 63-292111.

It has become possible to use elements such as FETs as switching means for F-type inverters, step-down chopper regulators, and the like. Since these elements are voltage-driven elements, the capacitance of the drive circuit can be reduced. However, since the gate voltage is applied to the source terminal, there is no problem if the source terminal is common to the ground, but
If the source terminal is not common to ground, a separate drive circuit power supply is required.

For example, FIG. 3 shows a bridge type inverter circuit, and FIG. 4 shows a chopper type regulator circuit.

In the figure, 55 is the load, 6 is the DC power supply, and 11 to 15 are the FEs.
It represents T.

The source terminals of the transistors FETLI and FET12 shown in Figure 3 are connected to the load, and the source terminal of the transistor FET15 shown in Figure 4 is also connected to a diode, coil, capacitor, load, etc., so both sources are grounded. However, the power supply for the gate pulse requires an independent power supply based on the source terminal of each element. For this reason, conventionally, when using such an element configuration for boat fishing, if! for the gltA circuit is used. ! It was necessary to use an edge transformer or an isolated DC-DC converter, and the power supply became large-scale.

Figure 5 is a bridge type inverter circuit diagram in which part of the circuit shown in Figure 3 is replaced with bipolar transistors, and Figure 6 is a chopper type regulator circuit diagram in which part of the circuit shown in Figure 4 is replaced with bipolar transistors. It is.

In the figure, 16 to 24 represent bipolar transistors. If the above-mentioned power source means cannot be used due to size constraints of the device, the circuit must be constructed using bipolar transistors or the like, as shown in FIGS. 5 and 6, for example.

Therefore, since bipolar transistors are used, power is required for the drive circuit.

Another drawback was that the switching frequency could not be increased. In other words, the advantages of using FETs could not be enjoyed.

[Problem to be solved by the invention]

As mentioned above, in the conventional case, if an FET or the like is used as a control element, an independent t source is required, and the power supply for this becomes large-scale.If a bipolar transistor or the like is used as a control element, a large power supply capacity is required. However, there were problems such as the inability to increase the switching frequency.

The present invention has been made in view of nine or more problems,
As a power source in circuits using F'ET.

Easily realize multiple independent power supplies.

The purpose is to provide inverters and regulators using FETs in a simple form.

[Means to solve the problem]

FIG. 1 is a diagram showing the principle configuration of the present invention.

In the figure, 30 is a generator, and 40 is a power converter.

50 - Independent power generation winding (hereinafter referred to as independent winding)
, 60-i is a rectifier circuit section, 70-4 is a voltage stabilization section, 8
0-i represents a control element, and 10 represents a main winding of the generator.

The independent winding 50-i is a power generation winding provided independently from the main winding 10.

The rectifier circuit section 60-i is a circuit that rectifies the alternating current voltage generated in the independent winding 50-i into direct current.

The voltage stabilizing section 70-1 stabilizes the DC voltage of the rectifier circuit section to a desired voltage value.

[Effect]

The independent winding 550-i and the rectifier circuit section 60-1. The independent DC voltage obtained by the voltage stabilizing section 70-i is applied to the control element 80-1 of the N-force converter 40 that requires an independent DC voltage [Example] FIG. An example is shown.

In the figure, reference numeral 30 is a generator, 61 to 63 are block-shaped rectifier circuits, and 81 to 85 are FETs.

+00 represents a three-phase bridge type rectifier circuit, 200 represents a chopper type regulator circuit, 300 represents a bridge type inverter circuit, and 400 represents a control circuit that controls the chopper type regulator circuit 200 and the bridge type inverter circuit 300.

In this embodiment, the alternating current voltage generated in the main windings of two generators is rectified into direct current by a three-phase bridge-type rectifier circuit 100, and this direct current is made into a constant voltage by a chopper-type regulator circuit 200. Furthermore, the present invention relates to a power conversion device that converts this constant voltage DC into AC using a bridge type inverter circuit 300.

First, the mode of control performed by the 9 control circuit 400 will be explained.

Regarding the bridge type inverter circuit 300, the so-called P
Performs inverter control for WM Houni. FETs 81 and 82 are driven via photothyristor couplers.

A square wave drive signal is sent to these FETs 81 and 82 in an orderly manner every half cycle of the frequency of the AC power to be output, and the FETs 81 and 82 are controlled so as to alternately repeat an on state and an off state. Ru.

On the other hand, FET83 (and 84) is
The FET 81 (82) paired with (84) receives a drive signal of a high frequency so-called PWM signal during an on period. That is, an alternating voltage is supplied to the load 5.

In the chopper type regulator circuit 200.

The voltage applied to the load 5 is detected, and when the voltage is zero or lower than a predetermined voltage, the FET 85 is turned on via the photothyristor coupler, and when the voltage is higher than the predetermined voltage.

The AC output is controlled to be stabilized by turning off the FET 85 and stabilizing the output of the chopper regulator circuit 200.

In addition, when the source currents of FETs 83 and 84 are detected and an abnormality or overload condition of the device is detected, the FE
The output of the chopper regulator circuit 200 is suppressed by preventing T85 from being turned on, thereby suppressing the generation of alternating current output.

Now, since FETs 81 and 82.85 are not source-grounded type circuits, an independent power supply is required.

Therefore, an independent winding separate from the main winding (50-
1) to the respective FETs 81 and 82.8
5, the AC voltage generated in each winding is rectified by bridge type rectifier circuits 61 to 63, and the voltage is stabilized by connecting a resistor, a Zener diode, and a capacitor, and the FET is It constitutes an independent Ti source for driving.

By applying the DC voltages Vccl to 3 thus obtained, FETs 81 and 82.85 can operate normally regardless of the source voltage.

〔Effect of the invention〕

As explained above, according to the present invention, an independent winding is provided in the generator in addition to the main winding, and a circuit is configured to rectify the AC voltage generated in the independent winding. By easily realizing a power source, it becomes possible to provide an inverter or a regulator using FETs in a simple form.

[Brief explanation of the drawing]

Fig. 1 is a diagram of the principle configuration of the present invention, Fig. 2 is an embodiment of the present invention, Fig. 3 is a circuit diagram of a bridge type inverter using FETs, and Fig. 4 is a circuit diagram of a chipper type regulator using FETs. , FIG. 5 is a bridge type inverter circuit diagram in which part of the circuit shown in FIG. 3 is replaced with bipolar transistors,
FIG. 6 is a chopper type regulator circuit diagram in which a part of the circuit shown in FIG. 4 is replaced with a bipolar transistor. In the figure, numeral 30 is a generator, and 40 is a power conversion device. 50-1 is a power generation winding, and 60-i is a rectifier circuit section. 70-1 represents a voltage stabilizing section, and 80-i represents a control element.

Claims (1)

[Claims] A power supply device in which the output energy of a generator is converted by a power conversion device having a plurality of control semiconductor elements, comprising: a plurality of power generation windings each independent of a power generation main winding; It is equipped with a rectifier circuit section that rectifies the alternating current voltage generated in a plurality of independent power generation windings into direct current, and a voltage stabilization section that stabilizes the direct current voltage of the rectifier circuit section to a desired voltage value. A power supply device characterized in that it supplies power to individual control semiconductor elements.