CN210927450U - Frequency converter with auxiliary starting structure - Google Patents
Frequency converter with auxiliary starting structure Download PDFInfo
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- CN210927450U CN210927450U CN201922424943.8U CN201922424943U CN210927450U CN 210927450 U CN210927450 U CN 210927450U CN 201922424943 U CN201922424943 U CN 201922424943U CN 210927450 U CN210927450 U CN 210927450U
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Abstract
A frequency converter with an auxiliary starting structure, comprising: the rectifier circuit is a circuit for rectifying alternating current into direct current, the inverter circuit is a circuit for inverting the direct current into the alternating current, one end of the resistor R1 is connected with the anode of the output end of the rectifier circuit, and the other end of the resistor R1 is connected with the anode of the capacitor C1; the negative pole of the capacitor C1 is connected with the negative pole of the output end of the rectification circuit, the input end of the inverter circuit is connected with the capacitor C1 in parallel, the coil of the relay MC is connected with the capacitor C1 in parallel, and two contacts of the relay MC are connected with the resistor R1 in parallel; the converter circular telegram at the twinkling of an eye at first charges to the electric capacity through the resistance at a slow speed, reduces the impact to rectifier bridge and converter switch, has light and sound prompt facility in the charging process, and whole start-up process need not the human operation, and the converter is automatic to be accomplished.
Description
The technical field is as follows:
the utility model belongs to the technical field of the converter technique and specifically relates to a converter with auxiliary starting structure that says so.
Background art:
the frequency converter is an electric control device which applies a frequency conversion technology and a microelectronic technology and controls an alternating current motor by changing the frequency mode of a working power supply of the motor.
The frequency converter adjusts the voltage and frequency of an output power supply by switching on and off an internal insulated gate bipolar transistor, provides the required power supply voltage according to the actual requirement of the motor, and further achieves the purposes of energy saving and speed regulation. With the continuous improvement of the industrial automation degree, the frequency converter is also widely applied.
In the ac-dc-ac frequency converter, mainly divide into rectifier circuit, filtering energy storage circuit, inverter circuit, main theory of operation is to store the electric capacity into the direct current through rectifier circuit with alternating current rectification, then become alternating current output through inverter circuit with the direct current in the electric capacity, in order to guarantee inverter circuit's steady operation, the electric capacity among the filtering energy storage circuit generally can be very big, however the electric capacity charging current can be very big in the twinkling of an eye that the converter circular telegram, bring heavy current impact to converter main switch and rectifier circuit undoubtedly like this, can burn out rectifier circuit or converter switch when serious, consequently urgent demand one kind can slow down the device that the electric current impacted in the twinkling of an eye at the circular telegram of converter.
The utility model has the following contents:
for solving the above problem, overcome the not enough of prior art, the utility model discloses plan to provide a simple structure, slow down a converter that has auxiliary starting structure who starts impulse current.
In order to achieve the above object, the utility model provides a pair of converter with auxiliary starting structure, include: the device comprises a rectifying circuit, an inverter circuit, a relay MC, a resistor R1 and a capacitor C1, wherein the rectifying circuit is a circuit for rectifying alternating current into direct current, the inverter circuit is a circuit for inverting the direct current into the alternating current,
one end of the resistor R1 is connected with the anode of the output end of the rectifying circuit, and the other end of the resistor R1 is connected with the anode of the capacitor C1; the negative pole of the capacitor C1 is connected with the negative pole of the output end of the rectification circuit, the input end of the inverter circuit is connected with the capacitor C1 in parallel, the coil of the relay MC is connected with the capacitor C1 in parallel, and two contacts of the relay MC are connected with the resistor R1 in parallel.
Furthermore, the coil of the relay MC is connected in series with a diode D3 and then connected in parallel with a capacitor C1, the anode of the diode D3 is connected with the anode of the capacitor C1, the cathode of the diode is connected with one end of the coil of the relay MC, and the other end of the coil of the relay MC is connected with the cathode of the capacitor C1; and two ends of the coil of the relay MC are connected with a capacitor C2, and a capacitor C2 is connected with the coil of the relay MC in parallel.
Furthermore, the positive electrode of the output end of the rectifying circuit is also connected with a resistor R2 and a light emitting diode D1, one end of the resistor R2 is connected with the positive electrode of the output end of the rectifying circuit, the other end of the resistor R2 is connected with the positive electrode of the light emitting diode D1, and the negative electrode of the light emitting diode D1 is connected with the positive electrode of the capacitor C1.
Furthermore, the positive electrode of the output end of the rectifying circuit is also connected with a resistor R3 and a buzzer B1, the positive electrode of the output end of the rectifying circuit is connected with one end of a resistor R3, the other end of the resistor R3 is connected with the positive electrode of a buzzer B1, and the negative electrode of the buzzer B1 is connected with the positive electrode of a capacitor C1.
Furthermore, a coil of the relay MC is also connected with a resistor R4 and a light emitting diode D2, and the resistor R4 is connected in series with the light emitting diode D2 and then connected in parallel with the coil of the relay MC.
The utility model has the advantages that: the converter circular telegram at the twinkling of an eye at first charges to the electric capacity through the resistance at a slow speed, reduces the impact to rectifier bridge and converter switch, has light and sound prompt facility in the charging process, and whole start-up process need not the human operation, and the converter is automatic to be accomplished.
Description of the drawings:
FIG. 1 is a schematic structural diagram of the present invention;
the specific implementation mode is as follows:
in order to make the purpose, technical solution and advantages of the present invention clearer, the drawings of the present invention will be combined below, right to the present invention perform more detailed description.
In describing the present invention, it should be understood that the directions or positional relationships indicated as the terms "center", "upper", "lower", "left", "right", "front", "rear", "lower left", "upper right", "outer", etc. are based on the directions or positional relationships shown in the drawings, and are only for convenience of description and simplification of the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore, should not be interpreted as limiting the scope of the present invention. Furthermore, the terms "first," "second," and "third," as used herein, are used for descriptive purposes only and are not intended to indicate or imply relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are used in a broad sense, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1, a frequency converter with an auxiliary starting structure includes: the rectifier circuit is a circuit for rectifying alternating current into direct current, the inverter circuit is a circuit for inverting the direct current into alternating current with any frequency and any voltage, one end of the resistor R1 is connected with the anode of the output end of the rectifier circuit, and the other end of the resistor R1 is connected with the anode of the capacitor C1; the negative pole of the capacitor C1 is connected with the negative pole of the output end of the rectification circuit, the input end of the inverter circuit is connected with the capacitor C1 in parallel, the coil of the relay MC is connected with the capacitor C1 in parallel, and two contacts of the relay MC are connected with the resistor R1 in parallel.
The coil of the relay MC is connected with a diode D3 in series and then connected with a capacitor C1 in parallel, the anode of the diode D3 is connected with the anode of the capacitor C1, the cathode of the diode is connected with one end of the coil of the relay MC, and the other end of the coil of the relay MC is connected with the cathode of the capacitor C1; and two ends of the coil of the relay MC are connected with a capacitor C2, and a capacitor C2 is connected with the coil of the relay MC in parallel.
The positive pole of the output end of the rectifying circuit is also connected with a resistor R2 and a light emitting diode D1, one end of the resistor R2 is connected with the positive pole of the output end of the rectifying circuit, the other end of the resistor R2 is connected with the positive pole of the light emitting diode D1, and the negative pole of the light emitting diode D1 is connected with the positive pole of the capacitor C1.
The positive pole of the output end of the rectifying circuit is also connected with a resistor R3 and a buzzer B1, the positive pole of the output end of the rectifying circuit is connected with one end of a resistor R3, the other end of the resistor R3 is connected with the positive pole of a buzzer B1, and the negative pole of the buzzer B1 is connected with the positive pole of a capacitor C1.
The coil of the relay MC is also connected with a resistor R4 and a light emitting diode D2, and the resistor R4 is connected with the light emitting diode D2 in series and then connected with the coil of the relay MC in parallel.
As shown in the attached figure 1, the working principle of the utility model is as follows: firstly, the output end of the frequency converter is connected with a control device, the input end of a rectifying circuit is connected with a power supply, the rectifying circuit rectifies alternating current into direct current, the current of the positive electrode of the rectifying circuit can charge a capacitor C1 through a resistor R1, meanwhile, the current of the positive electrode of the rectifying circuit can also flow through a resistor R2 and a light emitting diode D1 to enable a light emitting diode D1 to emit light, the current of the positive electrode of the rectifying circuit can also flow through a resistor R3 and a buzzer B1 to enable the buzzer B1 to emit sound, the light of the light emitting diode D1 and the sound of the buzzer B1 are used for reminding that the frequency converter is in the process of charging the capacitor C1 at the moment, when the voltage of a capacitor C1 rises enough to drive a coil of a relay MC, the relay MC is attracted, the positive electrode of the rectifying circuit is in short circuit with the positive electrode of the capacitor C1, the current of the positive electrode of the rectifying circuit directly, meanwhile, the light-emitting diode D1 and the buzzer B1 are turned off because no current flows, and the starting process is finished at the moment; after the frequency converter is started, the current of the capacitor C1 can charge the capacitor C2 through the diode D3, the capacitor C2 is used for stabilizing the working voltage of the relay MC coil, and the diode D3 is used for preventing the current of the capacitor C2 from flowing back to the capacitor C1 when the load is too large, so that the pull-in of the relay MC is insufficient due to the fact that the voltage of the relay MC coil is too low; after the coil of the relay MC is energized, current also flows through the light emitting diode D2 and the resistor R4, and the brightness of the light emitting diode can reflect the working state of the coil of the relay MC.
Except for the technical features described in the specification, the method is known to the technical personnel in the field.
Claims (5)
1. A frequency converter with an auxiliary starting structure, comprising: the rectifier circuit is a circuit for rectifying alternating current into direct current, the inverter circuit is a circuit for inverting the direct current into the alternating current, one end of the resistor R1 is connected with the anode of the output end of the rectifier circuit, and the other end of the resistor R1 is connected with the anode of the capacitor C1; the negative pole of the capacitor C1 is connected with the negative pole of the output end of the rectification circuit, the input end of the inverter circuit is connected with the capacitor C1 in parallel,
the coil of the relay MC is connected with a capacitor C1 in parallel, and two contacts of the relay MC are connected with a resistor R1 in parallel.
2. The frequency converter with the auxiliary starting structure according to claim 1, characterized by comprising: the coil of the relay MC is connected with a diode D3 in series and then connected with a capacitor C1 in parallel, the anode of the diode D3 is connected with the anode of the capacitor C1, the cathode of the diode is connected with one end of the coil of the relay MC, and the other end of the coil of the relay MC is connected with the cathode of the capacitor C1; and two ends of the coil of the relay MC are connected with a capacitor C2, and a capacitor C2 is connected with the coil of the relay MC in parallel.
3. A frequency converter having an auxiliary starting structure according to claim 1, wherein: the positive pole of the output end of the rectifying circuit is also connected with a resistor R2 and a light emitting diode D1, one end of the resistor R2 is connected with the positive pole of the output end of the rectifying circuit, the other end of the resistor R2 is connected with the positive pole of the light emitting diode D1, and the negative pole of the light emitting diode D1 is connected with the positive pole of the capacitor C1.
4. A frequency converter having an auxiliary starting structure according to claim 1, wherein: the positive pole of the output end of the rectifying circuit is also connected with a resistor R3 and a buzzer B1, the positive pole of the output end of the rectifying circuit is connected with one end of a resistor R3, the other end of the resistor R3 is connected with the positive pole of a buzzer B1, and the negative pole of the buzzer B1 is connected with the positive pole of a capacitor C1.
5. A frequency converter having an auxiliary starting structure according to claim 1, wherein: the coil of the relay MC is also connected with a resistor R4 and a light emitting diode D2, and the resistor R4 is connected with the light emitting diode D2 in series and then connected with the coil of the relay MC in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922424943.8U CN210927450U (en) | 2019-12-30 | 2019-12-30 | Frequency converter with auxiliary starting structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922424943.8U CN210927450U (en) | 2019-12-30 | 2019-12-30 | Frequency converter with auxiliary starting structure |
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| Publication Number | Publication Date |
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| CN210927450U true CN210927450U (en) | 2020-07-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201922424943.8U Active CN210927450U (en) | 2019-12-30 | 2019-12-30 | Frequency converter with auxiliary starting structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112260375A (en) * | 2020-10-13 | 2021-01-22 | 青岛中加特电气股份有限公司 | Circuit device, method and frequency conversion system |
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2019
- 2019-12-30 CN CN201922424943.8U patent/CN210927450U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112260375A (en) * | 2020-10-13 | 2021-01-22 | 青岛中加特电气股份有限公司 | Circuit device, method and frequency conversion system |
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