CN106158316B - A kind of variable-frequency variable-voltage device - Google Patents

Abstract

The invention discloses a frequency conversion and voltage conversion device, which comprises a box body; two box doors are installed on the front of the box body; a handle is respectively provided at a position close to the middle of the box door; one box door of the two box doors is under the handle A safety lock is installed at the side position; a single-phase voltage conversion knob is installed at the upper middle position on one side of the box; one side of the single-phase voltage conversion knob is provided with a single-phase voltage output socket; the other side of the box is close to the single-phase voltage conversion knob. A single-phase voltage display is installed on the side; a three-phase voltage conversion knob is installed on the lower side of the single-phase voltage output socket; a three-phase voltage display is installed on one side of the three-phase voltage conversion knob; a three-phase voltage display is installed on the other side of the three-phase voltage display. Voltage output socket; the lower side of the three-phase voltage display is equipped with a three-phase frequency display; one side of the three-phase frequency display is provided with a three-phase frequency conversion knob; the invention can convert the voltage and frequency of the power circuit, and is equipped with corresponding temperature, smoke , Humidity monitoring, small footprint, safe and convenient.

Description

A frequency conversion device

technical field

The invention relates to the technical field of voltage conversion equipment, in particular to a frequency conversion and voltage conversion device.

Background technique

At present, from the perspective of safe and stable operation of the grid, flexible power flow control, and the development of the power market, there needs to be a clear interface between interconnected grids, which is even more important for AC interconnection. Otherwise, once a certain interconnection line fails, a large-scale power transfer may occur, affecting the safe operation of the entire networked system. This scene happened in the 2003 blackout in the United States and Canada, and brought serious consequences. In addition, due to the limitation of the characteristics of DC transmission itself, the normal operation of conventional DC (including DC back-to-back) needs to be supported by the system voltage on both sides to achieve normal commutation and rectification. At the same time, faults near the converter station are also easy Cause failures such as DC commutation failure. Therefore, when supplying power to a weak grid, the DC connection has certain limitations. In addition, DC transmission will bring certain harmonics to the system, requiring a large amount of filter equipment; therefore, variable frequency transformers are produced, but most of the existing power variable frequency transformers are large and occupy a large area, which is not suitable for some small power supply Therefore, we need a new frequency conversion and voltage conversion device.

Contents of the invention

The purpose of the present invention is to provide a frequency conversion and voltage conversion device to solve the problems raised in the background art above.

In order to achieve the above object, the present invention provides the following technical solutions: a frequency conversion and voltage conversion device, including a box body; two box doors are installed on the front of the box body; handle; one of the two doors is equipped with a safety lock on the lower side of the handle; a single-phase voltage-changing knob is provided at the upper middle position on one side of the box; the single-phase One side of the variable voltage knob is provided with a single-phase voltage output socket; the side of the box close to the other side of the single-phase voltage variable knob is equipped with a single-phase voltage display; the lower side of the single-phase voltage output socket A three-phase voltage transformation knob is provided; a three-phase voltage display is installed on one side of the three-phase voltage transformation knob; a three-phase voltage output socket is provided on the other side of the three-phase voltage display; A three-phase frequency display is installed on the lower side; a three-phase frequency conversion knob is arranged on one side of the three-phase frequency display; a voltage rectifier is provided near the top inside the box; one side of the voltage rectifier is a single-phase Transformer; the bottom surface of the single-phase transformer is connected with a heat dissipation plate; the lower side of the heat dissipation plate is provided with a three-phase transformer; the bottom surface of the three-phase transformer is connected with a second heat dissipation plate; the second heat dissipation plate is connected The lower side of the plate is provided with a three-phase frequency converter; the lower side of the three-phase frequency converter is provided with a third cooling plate; the lower side of the third cooling plate is provided with a refrigerator; There is a refrigerant pipeline; the refrigerant pipeline is connected with the refrigerator.

Preferably, the three-phase voltage output socket is arranged on one side of the box; the back of the three-phase voltage display is connected to one side of the box; the three-phase frequency conversion knob, three-phase voltage conversion knob, The single-phase voltage transformation knob is arranged on the same side of the box body.

Preferably, the single-phase voltage transformation knob is installed on one side of the front of the single-phase transformer; the single-phase voltage display is installed on the other side of the front of the single-phase transformer; the bottom of the refrigerator is in line with the inner bottom of the box. connect.

Preferably, the three-phase voltage conversion knob is installed on one side of the front of the three-phase transformer; the three-phase voltage display is installed on the other side of the front of the three-phase transformer; the three-phase frequency conversion knob is installed on the three-phase One side of the front of the inverter; the three-phase frequency display is installed on the other side of the front of the three-phase inverter.

Preferably, an electromagnetic relay a is installed at the inner side of the upper box on the second heat sink; the upper side of the electromagnetic relay a is provided with a main circuit control protection box; the main circuit control protection box is Electromagnetic relay b on the upper side; the back of the electromagnetic relay b, the back of the main circuit control protection box are connected to the inner side of the back of the box body.

Preferably, one side of the electromagnetic relay b is provided with a temperature sensor; the upper side of the temperature sensor is provided with a smoke sensor; the upper side of the smoke sensor is provided with a humidity sensor; the temperature sensor, smoke The sensor and the humidity sensor are located on the same straight line.

Preferably, a micro-controller is installed between the temperature sensor and the electromagnetic relay b; the micro-controller is associated with the temperature sensor, the smoke sensor, and the humidity sensor.

Preferably, the back of the microcontroller is connected to a fixing plate; the other side of the fixing plate is connected to the inner side of the back of the box; the inside of the top of the box is provided with an insulating layer.

Compared with the prior art, the beneficial effect of the present invention is: the present invention uses a three-phase frequency converter and a three-phase transformer. Strong interference, placed alone on the first floor. Then input it into the three-phase transformer for processing, adjust it with the three-phase voltage transformation knob, and output the required frequency voltage at the three-phase voltage output socket; use a voltage rectifier, and the voltage rectifier rectifies the three-phase voltage to become a constant voltage output, and then input Enter the single-phase transformer, through the adjustment of the single-phase voltage transformation knob, the required stable voltage is output at the single-phase voltage output socket; there are temperature sensors, humidity sensors and smoke sensors in the box to monitor the temperature, humidity and smoke concentration in the box respectively , when the temperature reaches the warning temperature, the microcontroller controls the electromagnetic relay a to supply power to the refrigerator and cool down the box. When the humidity and smoke concentration reach the warning temperature, the microcontroller controls the electromagnetic relay b to cut off the power of the whole device and send out Alarm; the main circuit is used to control the protection box, the main voltage line is input into the main circuit control protection box through the electromagnetic relay a and the electromagnetic relay b, the circuit switch in the main circuit control protection box can protect the circuit from leakage and overload, and the main circuit control protection The box is divided into three lines that are respectively input to a single-phase transformer, a three-phase transformer and a refrigerator.

Description of drawings

Fig. 1 is a schematic diagram of the appearance structure of the present invention;

Fig. 2 is a schematic diagram of the internal structure of the box body of the present invention;

Fig. 3 is a partial schematic diagram of the interior of the box body of the present invention.

In the figure: 1. Box body; 2. Box door; 3. Handle; 4. Safety lock; 5. Single-phase voltage conversion knob; 6. Single-phase voltage display; 7. Single-phase voltage output socket; 8. Three-phase 9. Three-phase voltage display; 10. Three-phase voltage output socket; 11. Three-phase frequency conversion knob; 12. Three-phase frequency display; 13. Voltage rectifier; 14. Single-phase transformer; 15. Heat sink; 16. Three-phase transformer; 17. Three-phase inverter; 18. Refrigerant pipeline; 19. Refrigerator; 20. Electromagnetic relay a; 21. Main circuit control protection box; 22. Temperature sensor; 23. Smoke sensor; 24. Humidity sensor ; 25, electromagnetic relay b;; 26, microcontroller; 27, fixed plate; 28, insulation layer.

detailed description

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Please refer to Figures 1-3, the present invention provides a technical solution: including a box body 1; two doors 2 are installed on the front of the box body 1; Handle 3; one of the two doors 2 is equipped with a safety lock 4 at the lower side of the handle 3; a single-phase pressure-changing knob is provided at the upper middle position on one side of the box body 1 5; one side of the single-phase voltage transformation knob 5 is provided with a single-phase voltage output socket 7; the side of the box 1 close to the other side of the single-phase voltage transformation knob 5 is equipped with a single-phase voltage display 6 The lower side of the single-phase voltage output socket 7 is provided with a three-phase variable voltage knob 8; one side of the three-phase variable voltage knob 8 is equipped with a three-phase voltage display 9; the other side of the three-phase voltage display 9 A three-phase voltage output socket 10 is provided on one side; a three-phase frequency display 12 is installed on the lower side of the three-phase voltage display 9; a three-phase frequency conversion knob 11 is provided on one side of the three-phase frequency display 12; the box The inside of the body 1 is provided with a voltage rectifier 13 near the top; one side of the voltage rectifier 13 is a single-phase transformer 14; the bottom surface of the single-phase transformer 14 is connected with a cooling plate 15; The lower side is provided with a three-phase transformer 16; the bottom surface of the three-phase transformer 16 is connected with a second cooling plate 15; the lower side of the second cooling plate 15 is provided with a three-phase frequency converter 17; the three-phase frequency conversion The lower side of the device 17 is provided with a third cooling plate 15; the lower side of the third cooling plate 15 is provided with a refrigerator 19; the inside of the cooling plate 15 is provided with a refrigerant pipeline 18; the refrigerant The pipeline 18 is connected to the refrigerator 19; the three-phase voltage output socket 10 is arranged on one side of the box body 1; the back of the three-phase voltage display 9 is connected to one side of the box body 1; The phase frequency conversion knob 11, the three-phase voltage conversion knob 8, and the single-phase voltage conversion knob 5 are arranged on the same side of the box body 1; the single-phase voltage conversion knob 5 is installed on the front side of the single-phase transformer 14; The phase voltage indicator 6 is installed on the other side of the front of the single-phase transformer 14; the bottom surface of the refrigerator 19 is connected to the inner bottom surface of the box body 1; side; the three-phase voltage display 9 is installed on the other side of the front of the three-phase transformer 16; the three-phase frequency conversion knob 11 is installed on one side of the front of the three-phase frequency converter 17; the three-phase frequency display 12 Installed on the other side of the front of the three-phase frequency converter 17; an electromagnetic relay a20 is installed at the position inside the back of the box body 1 on the upper side of the second cooling plate 15; the upper side of the electromagnetic relay a20 is provided with a main circuit Control protection box 21; the electromagnetic relay b25 on the upper side of the main circuit control protection box 21; the back side of the electromagnetic relay b25, the back side of the main circuit control protection box 21 is connected to the inner side of the back side of the box body 1; the electromagnetic relay b25 One side of the temperature sensor 22 is provided; the upper side of the temperature sensor 22 is provided with a smoke sensor 23; the upper side of the smoke sensor 23 is provided with There is a humidity sensor 24; the temperature sensor 22, the smoke sensor 23, and the humidity sensor 24 are located on the same straight line; a microcontroller 26 is installed between the temperature sensor 22 and the electromagnetic relay b25; The microcontroller 26 is associated with the temperature sensor 22, the smoke sensor 23, and the humidity sensor 24; the back of the microcontroller 26 is connected with a fixed plate 27; connected; the inside of the top surface of the box 1 is provided with an insulating and heat insulating layer 28 .

When the present invention is actually implemented, when the device is working, the three-phase frequency converter 17 performs frequency conversion processing on the voltage frequency, adjusts it with the three-phase frequency conversion knob 11, and then inputs it into the three-phase transformer 16 for processing, and uses the three-phase voltage conversion knob 8 to adjust, and output the required frequency voltage at the three-phase voltage output socket 10; the voltage rectifier 13 rectifies the three-phase voltage to become a constant voltage output, and then enters the single-phase transformer 14 at the input, and through the adjustment of the single-phase voltage conversion knob 5, The required stable voltage is output at the single-phase voltage output socket 7; there are temperature sensor 22, humidity sensor 24 and smoke sensor 23 in the box body 1 to monitor the temperature, humidity and smoke concentration in the box respectively. When the temperature reaches the warning temperature, the micro The controller 26 controls the electromagnetic relay a20 to supply power to the refrigerating machine 19, and cools down the inside of the box body 1. When the humidity and smoke concentration reach an alert, the micro-controller 26 controls the electromagnetic relay b25 to power off the entire device and issue an alarm; The main line is input into the main circuit control protection box 21 through the electromagnetic relay a20 and the electromagnetic relay b25. The circuit switch in the main circuit control protection box 21 can protect the circuit from leakage and overload, and is divided into three lines in the main circuit control protection box 21. It is input to the single-phase transformer 14, the three-phase transformer 16, and the refrigerator 19 to perform individual control.

Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that various changes, modifications and substitutions can be made to these embodiments without departing from the principle and spirit of the present invention. and modifications, the scope of the invention is defined by the appended claims and their equivalents.

Claims (7)

1. A variable frequency and voltage conversion device, characterized in that: it includes a box (1); two doors (2) are installed on the front of the box (1); the door (2) is close to the middle A handle (3) is provided at the position respectively; one door (2) in the two doors (2) is equipped with a safety lock (4) at the lower side of the handle (3); A single-phase voltage transformation knob (5) is provided at the upper middle position on one side of the box body (1); a single-phase voltage output socket (7) is provided on one side of the single-phase voltage transformation knob (5); A single-phase voltage indicator (6) is installed on the side of the box body (1) close to the other side of the single-phase voltage transformation knob (5); the lower side of the single-phase voltage output socket (7) is provided with a three-phase voltage transformer Knob (8); a three-phase voltage indicator (9) is installed on one side of the three-phase voltage transformation knob (8); the other side of the three-phase voltage indicator (9) is provided with a three-phase voltage output socket (10 ); the lower side of the three-phase voltage display (9) is equipped with a three-phase frequency display (12); one side of the three-phase frequency display (12) is provided with a three-phase frequency conversion knob (11); the box A voltage rectifier (13) is provided inside the body (1) near the top; one side of the voltage rectifier (13) is a single-phase transformer (14); the bottom surface of the single-phase transformer (14) is connected with a heat sink plate (15); the lower side of the heat dissipation plate (15) is provided with a three-phase transformer (16); the bottom surface of the three-phase transformer (16) is connected with a second heat dissipation plate (15); the second A three-phase frequency converter (17) is provided on the lower side of the heat dissipation plate (15); the third heat dissipation plate (15) is provided on the lower side of the three-phase frequency converter (17); the third heat dissipation plate ( 15) is provided with a refrigerator (19) on the lower side; the inside of the cooling plate (15) is provided with a refrigerant pipeline (18); the refrigerant pipeline (18) is connected to the refrigerator (19); An electromagnetic relay a (20) is installed at the inner side of the upper side of the second cooling plate (15) on the back of the box body (1); the upper side of the electromagnetic relay a (20) is provided with a main circuit control protection box (21); the electromagnetic relay b (25) on the upper side of the main circuit control protection box (21); the back side of the electromagnetic relay b (25), the back side of the main circuit control protection box (21) and the box body (1) The back inside is connected. 2. A frequency conversion and voltage conversion device according to claim 1, characterized in that: the three-phase voltage output socket (10) is arranged on one side of the box body (1); the three-phase voltage display (9 ) is connected to one side of the box body (1); the three-phase frequency conversion knob (11), three-phase voltage conversion knob (8), and single-phase voltage conversion knob (5) are arranged on the box body (1) of the same side. 3. A frequency conversion and voltage conversion device according to claim 1, characterized in that: the single-phase voltage conversion knob (5) is installed on the front side of the single-phase transformer (14); the single-phase voltage display (6) Installed on the other side of the front of the single-phase transformer (14); the bottom surface of the refrigerator (19) is connected to the inner bottom surface of the box body (1). 4. A frequency conversion and voltage conversion device according to claim 1, characterized in that: the three-phase voltage conversion knob (8) is installed on one side of the front of the three-phase transformer (16); the three-phase voltage The display (9) is installed on the other side of the front of the three-phase transformer (16); the three-phase frequency conversion knob (11) is installed on one side of the front of the three-phase inverter (17); the three-phase frequency display ( 12) It is installed on the other side of the front of the three-phase frequency converter (17). 5. A frequency conversion and voltage conversion device according to claim 1, characterized in that: one side of the electromagnetic relay b (25) is provided with a temperature sensor (22); the upper side of the temperature sensor (22) The side is provided with smoke sensor (23); The upper side of described smoke sensor (23) is provided with humidity sensor (24); Described temperature sensor (22), smoke sensor (23), humidity sensor (24) three lie on the same straight line. 6. A kind of frequency conversion and voltage conversion device according to claim 5, characterized in that: a microcontroller (26) is installed between the temperature sensor (22) and the electromagnetic relay b (25); Microcontroller (26) is associated with temperature sensor (22), smoke sensor (23), humidity sensor (24). 7. A kind of frequency conversion transformer device according to claim 6, is characterized in that: the back side of described microcontroller (26) is connected with fixed plate (27); The other side of described fixed plate (27) The side is connected to the inside of the back of the box body (1); the inside of the top surface of the box body (1) is provided with an insulating and heat-insulating layer (28).