CN204559429U - A kind of novel full bridge inverter - Google Patents

Abstract

The utility model relates to the technical field of inverter circuits, in particular to a novel full-bridge inverter circuit. It includes an input port, a first field effect tube, a second field effect tube, a third field effect tube and a fourth field effect tube; the terminal 1 of the input port is connected to the first inductance coil and is connected to the second field effect tube through the first inductance coil The source of the field effect tube is connected, the source of the second field effect tube is connected to the gate of the second field effect tube through the first bidirectional Zener diode, and the source of the second field effect tube is connected to the first inductance coil. The second inductance coil is connected to the first capacitor and the fourth capacitor at the same time, the fourth capacitor is connected to the gate of the first field effect transistor through the second bidirectional voltage regulator diode, and the source of the first field effect transistor is connected to the gate of the first field effect transistor through the third bidirectional voltage regulator The diode is connected to the gate of the third field effect transistor, and the drain of the third field effect transistor is connected to the gate of the fourth field effect transistor through the fourth bidirectional voltage regulator diode. The utility model has the advantages of simple circuit, convenient operation and strong practicability.

Description

A New Type of Full Bridge Inverter Circuit

technical field

The utility model relates to the technical field of inverter circuits, in particular to a novel full-bridge inverter circuit.

Background technique

As we all know, the inverter circuit corresponds to the rectifier circuit (Rectifier), and the conversion of direct current into alternating current is called inverter. When the AC side is connected to the power grid, that is, when the AC side is connected to a power source, it is called an active inverter; when the AC side is directly connected to the load, it is called a passive inverter.

Inverter circuits are widely used. Among the various existing power sources, storage batteries, dry batteries, solar cells, etc. are all DC power sources. When these power sources are required to supply power to AC loads, an inverter circuit is required. In addition, power electronic devices such as frequency converters for AC motor speed control, uninterruptible power supplies, and induction heating power supplies are widely used, and the core part of their circuits are inverter circuits. Its basic function is to convert the DC power output from the intermediate DC circuit into AC power with adjustable frequency and voltage under the control of the control circuit. However, the current inverter circuit is not perfect enough, and the field effect tube in the circuit cannot be turned on and off quickly.

Utility model content

Aiming at the deficiencies in the above-mentioned prior art, the purpose of this utility model is to provide a novel full-bridge inverter circuit.

In order to achieve the above object, the utility model adopts the following technical solutions:

A novel full-bridge inverter circuit, which includes an input port, an output port, a first field effect transistor, a second field effect transistor, a third field effect transistor and a fourth field effect transistor;

Terminal 1 and terminal 2 of the input port are simultaneously connected in parallel with a first resistor, a second resistor, a third resistor, and a fourth resistor, and terminal 1 of the input port is connected through the first capacitor and the second capacitor respectively. The power supply is grounded through the third capacitor, the first capacitor is connected to the input port with a first inductance coil and is connected to the source of the second field effect tube through the first inductance coil, and the source of the second field effect tube The pole and the first inductance coil are connected to the gate of the second field effect transistor through the first bidirectional voltage regulator diode, and the source of the second field effect transistor is connected to the drain of the first field effect transistor and passed through the second The inductance coil is connected to the first capacitor and the fourth capacitor at the same time, the fourth capacitor is connected to the gate of the first field effect transistor through the second bidirectional voltage regulator diode, and the source of the first field effect transistor is grounded and passed through the second The three bidirectional voltage regulator diodes are connected to the gate of the third field effect transistor, and the drain of the third field effect transistor is connected to the source of the second inductance coil and the fourth field effect transistor and passed through the fourth bidirectional voltage regulator diode It is connected with the gate of the fourth field effect transistor, and the 3 terminal pins of the output port are simultaneously connected with the drain electrode of the first field effect transistor, the source electrode of the second field effect transistor, and the The drain is connected to the source of the fourth field effect transistor, and the 1-terminal pin of the output port is connected to the 2-terminal pin of the input port.

Preferably, the first field effect transistor, the second field effect transistor, the third field effect transistor and the fourth field effect transistor are all IGBT field effect transistors with damping diodes.

Due to the adoption of the above scheme, the utility model makes the second FET, the first FET The gate voltage of the transistor, the third field effect transistor and the fourth field effect transistor is stabilized at a positive or negative certain voltage value, which can quickly turn on the field effect transistor and quickly turn off the field effect transistor; at the same time, the first inductance coil and the second The second inductance coil acts as an inertial link, so that the output current cannot be changed immediately, and forms an LC filter with the first capacitor, the second capacitor, the third capacitor and the fourth capacitor. It has a simple structure, convenient operation, and strong practicality. sex.

Description of drawings

Fig. 1 is a schematic diagram of the circuit structure of the embodiment of the utility model.

Detailed ways

The embodiments of the utility model will be described in detail below in conjunction with the accompanying drawings, but the utility model can be implemented in various ways defined and covered by the claims.

As shown in Figure 1, a new type of full-bridge inverter circuit includes an input port J1, an output port J2, a first field effect transistor G1, a second field effect transistor G2, a third field effect transistor G3 and a fourth field effect transistor. pipe G4;

The first resistor R1, the second resistor R2, the third resistor R3 and the fourth resistor R4 are connected in parallel to the 1st terminal and 2nd terminal of the input port J1, and the 1st terminal of the input port J1 passes through the first capacitor C1 and the second capacitor respectively. Capacitor C2 is connected to the power supply and grounded through the third capacitor C3. The first inductance coil L1 is connected between the first capacitor C1 and the input port J1 and is connected to the source of the second field effect transistor G2 through the first inductance coil L1. The source of the second field effect transistor G2 is connected to the gate of the second field effect transistor G2 through the first bidirectional voltage regulator diode D1 and the gate of the first field effect transistor G2, and the source of the second field effect transistor G2 is connected to the first field effect transistor G2. The drain of the tube G1 is connected to the first capacitor C1 and the fourth capacitor C4 through the second inductance coil L2, and the fourth capacitor C4 is connected to the gate of the first field effect transistor G1 through the second bidirectional voltage regulator diode D2, The source of the first field effect transistor G1 is grounded and connected to the gate of the third field effect transistor G3 through the third bidirectional voltage regulator diode D3, and the drain of the third field effect transistor G3 is simultaneously connected to the second inductance coil L2 and the fourth The source of the field effect transistor G4 is connected and connected to the gate of the fourth field effect transistor G4 through the fourth bidirectional voltage regulator diode D4, and the 3-terminal pin of the output port J2 is connected to the first field effect transistor G1 through the second inductance coil L2 at the same time. The drain of the second field effect transistor G2, the drain of the third field effect transistor G3 and the source of the fourth field effect transistor G4 are connected, and the 1-terminal pin of the output port J2 is connected to the 2-terminal pin of the input port J1 .

In this embodiment, the second field effect transistor G2, the first field effect transistor The gate voltages of G1, the third FET G3 and the fourth FET G4 are stabilized at a positive or negative certain voltage value, which can quickly turn on the FET and quickly turn off the FET; at the same time, the first inductance coil L1 and the second inductance coil L2 act as an inertial link, so that the output current cannot change immediately, and form an LC filter with the first capacitor C1, the second capacitor C2, the third capacitor C3 and the fourth capacitor C4.

In addition, in order to optimize the circuit, the first FET G1 , the second FET G3 , the third FET G3 and the fourth FET G4 in this embodiment are all IGBT FETs with damping diodes.

The above is only a preferred embodiment of the utility model, and does not limit the patent scope of the utility model. Any equivalent structure or equivalent process conversion made by using the specification of the utility model and the contents of the accompanying drawings may be directly or indirectly used in Other relevant technical fields are all included in the patent protection scope of the present utility model in the same way.

Claims (2)

1. a novel full bridge inverter, is characterized in that: it comprises input port, output port, the first field effect transistor, the second field effect transistor, the 3rd field effect transistor and the 4th field effect transistor;

1 end pin and the 2 end pin of described input port are parallel with the first resistance simultaneously, second resistance, 3rd resistance and the 4th resistance, 1 end pin of described input port is respectively by the first electric capacity and the second electric capacity access power supply and by the 3rd capacity earth, described first electric capacity be connected with the first inductance coil between input port and be connected by the source electrode of the first inductance coil with the second field effect transistor, the source electrode of described second field effect transistor is connected with the grid of the second field effect transistor by the first bi-directional voltage stabilizing diode with between the first inductance coil, the source electrode of described second field effect transistor is connected with the drain electrode of the first field effect transistor and passes through the second inductance coil and is connected with the first electric capacity and the 4th electric capacity simultaneously, described 4th electric capacity is connected with the grid of the first field effect transistor by the second bi-directional voltage stabilizing diode, the source ground of described first field effect transistor is also connected with the grid of the 3rd field effect transistor by the 3rd bi-directional voltage stabilizing diode, the drain electrode of described 3rd field effect transistor is connected with the source electrode of the second inductance coil and the 4th field effect transistor and passes through the 4th bi-directional voltage stabilizing diode simultaneously and is connected with the grid of the 4th field effect transistor, 3 end pin of described output port by the second inductance coil simultaneously with the drain electrode of the first field effect transistor, the source electrode of the second field effect transistor, the source electrode of drain electrode the 4th field effect transistor of the 3rd field effect transistor connects, 1 end pin of described output port is connected with 2 end pin of input port.

2. a kind of novel full bridge inverter as claimed in claim 1, is characterized in that: described first field effect transistor, the second field effect transistor, the 3rd field effect transistor and the 4th field effect transistor are the IGBT field effect transistor of band damper diode.