阅读说明：本技术 一种增氧机电机驱动电路 (Motor driving circuit of aerator ) 是由 潘虹因 于 2020-07-29 设计创作，主要内容包括：本发明涉及增氧机用驱动设备技术领域,其目的在于提供一种增氧机电机驱动电路。所采用的技术方案是：一种增氧机电机驱动电路,包括整流电路、直流电抗器、电解电容、驱动模块和增氧机电机；所述电解电容和驱动模块均与整流电路并联连接,所述驱动模块的控制端与增氧机电机电连接；所述直流电抗器包括线圈和铁芯,所述线圈绕设在铁芯上,所述线圈串联连接在整流电路和电解电容之间。本发明可有效提升增氧机电机的功率因数。(The invention relates to the technical field of driving equipment for an aerator, and aims to provide a motor driving circuit for the aerator. The adopted technical scheme is as follows: a driving circuit of a motor of an aerator comprises a rectifying circuit, a direct current reactor, an electrolytic capacitor, a driving module and the aerator motor; the electrolytic capacitor and the driving module are connected with the rectifying circuit in parallel, and the control end of the driving module is electrically connected with the motor of the aerator; the direct current reactor comprises a coil and an iron core, wherein the coil is wound on the iron core, and the coil is connected between the rectifying circuit and the electrolytic capacitor in series. The invention can effectively improve the power factor of the motor of the aerator.)

1. The utility model provides an oxygen-increasing machine motor drive circuit which characterized in that: the automatic aerator comprises a rectification circuit, a direct current reactor, an electrolytic capacitor, a driving module and an aerator motor; the electrolytic capacitor and the driving module are connected with the rectifying circuit in parallel, and the control end of the driving module is electrically connected with the motor of the aerator; the direct current reactor comprises a coil and an iron core, wherein the coil is wound on the iron core, and the coil is connected between the rectifying circuit and the electrolytic capacitor in series.

2. The aerator motor drive circuit as claimed in claim 1, wherein: one end of a coil of the direct current reactor is electrically connected with the positive electrode of the rectifying circuit, and the other end of the coil of the direct current reactor is electrically connected with the positive electrode of the electrolytic capacitor.

3. The aerator motor drive circuit as claimed in claim 1, wherein: one end of a coil of the direct current reactor is electrically connected with the negative electrode of the rectifying circuit, and the other end of the coil of the direct current reactor is electrically connected with the negative electrode of the electrolytic capacitor.

4. The aerator motor drive circuit as claimed in claim 1, wherein: the direct current reactors are provided with two coils, the coils in the two direct current reactors are divided into a first coil and a second coil, one end of the first coil is electrically connected with the positive pole of the rectifying circuit, the other end of the first coil is electrically connected with the positive pole of the electrolytic capacitor, one end of the second coil is electrically connected with the negative pole of the rectifying circuit, and the other end of the second coil is electrically connected with the negative pole of the electrolytic capacitor.

5. The aerator motor drive circuit as claimed in claim 1, wherein: the iron core is a silicon steel sheet.

6. The aerator motor drive circuit as claimed in claim 1, wherein: the rectification circuit is a bridge rectification circuit.

7. The aerator motor drive circuit as claimed in claim 1, wherein: the aerator motor driving circuit further comprises a controller, and the signal output end of the controller is electrically connected with the controlled end of the driving module.

8. The aerator motor drive circuit as claimed in claim 7, wherein: the aerator motor driving circuit further comprises a current sampling circuit, the current sampling circuit is connected with the aerator motor in series, and the signal output end of the current sampling circuit is electrically connected with the controller.

9. The aerator motor drive circuit as claimed in claim 8, wherein: the aerator motor driving circuit further comprises a voltage sampling circuit, the voltage sampling circuit is connected with the aerator motor in parallel, and the signal output end of the voltage sampling circuit is electrically connected with the controller.

10. The aerator motor drive circuit as claimed in claim 1, wherein: the drive module comprises a three-phase full-bridge drive circuit and a gate driver, the three-phase full-bridge drive circuit is connected with the rectification circuit in parallel, the controlled end of the three-phase full-bridge drive circuit is electrically connected with the gate driver, and the control end of the three-phase full-bridge drive circuit is electrically connected with the motor of the aerator.

Technical Field

The invention relates to the technical field of driving equipment for an aerator, in particular to a motor driving circuit for the aerator.

Background

The waterwheel in the breeding industry is usually driven by a traditional aerator motor, and at present, in order to reduce carbon emission and improve energy-saving efficiency in response to greenhouse effect, a direct current brushless motor or a permanent magnet synchronous motor is gradually used to replace the traditional aerator motor. The direct current brushless motor or the permanent magnet synchronous motor is used, energy-saving efficiency can be improved, the rotating speed can be adjusted and controlled, the rotating speed of the aerator motor can be increased or reduced according to different aquaculture environments and aquaculture aquatic species, the oxygen content in water can be adjusted, and the problem that the traditional alternating current aerator motor can only be used for configuring different aerator motors according to fixed rotating speed and different aquaculture aquatic species is solved.

However, the conventional dc brushless motor or the conventional permanent magnet synchronous motor still has a defect that the power factor is low due to the characteristic of the internal impedance, and the low power factor generates a large amount of virtual power, so that a power plant provides a large amount of power, but the actually used power is low, and a large amount of energy is wasted. Therefore, there is a need to develop a motor driving circuit for an aerator, which can increase the power factor of the aerator.

Disclosure of Invention

In order to solve the problems in the prior art, the invention provides a motor driving circuit of an aerator.

The technical scheme adopted by the invention is as follows:

a driving circuit of a motor of an aerator comprises a rectifying circuit, a direct current reactor, an electrolytic capacitor, a driving module and the aerator motor; the electrolytic capacitor and the driving module are connected with the rectifying circuit in parallel, and the control end of the driving module is electrically connected with the motor of the aerator; the direct current reactor comprises a coil and an iron core, wherein the coil is wound on the iron core, and the coil is connected between the rectifying circuit and the electrolytic capacitor in series.

Preferably, the dc reactor is provided with one, one end of the coil of the dc reactor is electrically connected to the positive electrode of the rectifying circuit, and the other end of the coil of the dc reactor is electrically connected to the positive electrode of the electrolytic capacitor.

Preferably, the dc reactor is provided with one, one end of the coil of the dc reactor is electrically connected to the negative electrode of the rectifier circuit, and the other end of the coil of the dc reactor is electrically connected to the negative electrode of the electrolytic capacitor.

Preferably, the number of the direct current reactors is two, the coils in the two direct current reactors are divided into a first coil and a second coil, one end of the first coil is electrically connected with the positive electrode of the rectifying circuit, the other end of the first coil is electrically connected with the positive electrode of the electrolytic capacitor, one end of the second coil is electrically connected with the negative electrode of the rectifying circuit, and the other end of the second coil is electrically connected with the negative electrode of the electrolytic capacitor.

Preferably, the iron core is a silicon steel sheet.

Preferably, the rectifier circuit is a bridge rectifier circuit.

Preferably, the aerator motor driving circuit further comprises a controller, and a signal output end of the controller is electrically connected with a controlled end of the driving module.

Further preferably, the aerator motor drive circuit further comprises a current sampling circuit, the current sampling circuit is connected with the aerator motor in series, and the signal output end of the current sampling circuit is electrically connected with the controller.

Further preferably, the aerator motor driving circuit further comprises a voltage sampling circuit, the voltage sampling circuit is connected with the aerator motor in parallel, and a signal output end of the voltage sampling circuit is electrically connected with the controller.

Preferably, the drive module includes three-phase full-bridge drive circuit and floodgate level driver, three-phase full-bridge drive circuit and rectifier circuit parallel connection, three-phase full-bridge drive circuit's controlled end is connected with floodgate level driver electricity, three-phase full-bridge drive circuit's control end and oxygen-increasing machine motor electricity are connected.

The invention has the beneficial effects of being concentrated and being capable of effectively improving the power factor of the motor of the aerator. Specifically, in the using process of the invention, the rectifying circuit is used for receiving a three-phase power supply and converting the three-phase power supply into a direct-current power supply; the direct current reactor is used for improving the power factor of the circuit, so that the current waveform is improved, and the power factor of the motor of the aerator is improved; the electrolytic capacitor is used for stabilizing the voltage of the direct-current power supply output by the direct-current reactor so as to change the rectified pulsating direct-current voltage into relatively stable direct-current voltage; the driving module is used for controlling the operation of the motor of the aerator. In the implementation process of the invention, the iron core is additionally arranged in the inductance coil, and the iron core can reduce the magnetic resistance of the coil, improve the capability of the coil for converting electric energy into a magnetic field, so as to reduce energy loss, and improve the conversion rate of converting the electric energy into mechanical energy or electric energy with other voltage values, thereby increasing the magnetic field strength of the coil, further improving the power factor of the motor of the aerator, and avoiding energy waste.

Drawings

FIG. 1 is a schematic circuit diagram of embodiments 1 and 2;

FIG. 2 is a schematic circuit diagram of embodiments 1 and 3;

FIG. 3 is a schematic circuit diagram of embodiments 1 and 4;

FIG. 4 is a schematic circuit diagram of a rectifier circuit, a DC reactor, and an electrolytic capacitor in accordance with example 1;

FIG. 5 is a schematic circuit diagram of a controller in embodiment 1;

fig. 6 is a circuit schematic diagram of a first current sampling circuit in embodiment 1;

fig. 7 is a circuit schematic diagram of a second current sampling circuit in embodiment 1;

fig. 8 is a circuit schematic diagram of a voltage sampling circuit in embodiment 1;

fig. 9 is a schematic circuit diagram of a driving module in embodiment 1.

Detailed Description

The invention is further described with reference to the following figures and specific embodiments. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. Specific structural and functional details disclosed herein are merely illustrative of example embodiments of the invention. This invention may, however, be embodied in many alternate forms and should not be construed as limited to the embodiments set forth herein.

It will be understood that, although the terms first, second, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without departing from the scope of example embodiments of the present invention.

It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments of the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises," "comprising," "includes" and/or "including," when used herein, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, numbers, steps, operations, elements, components, and/or groups thereof.

It should also be noted that, in some alternative implementations, the functions/acts noted may occur out of the order noted in the figures. For example, two figures shown in succession may, in fact, be executed substantially concurrently, or the figures may sometimes be executed in the reverse order, depending upon the functionality/acts involved.

It should be understood that specific details are provided in the following description to facilitate a thorough understanding of example embodiments. However, it will be understood by those of ordinary skill in the art that the example embodiments may be practiced without these specific details. For example, systems may be shown in block diagrams in order not to obscure the examples in unnecessary detail. In other instances, well-known processes, structures and techniques may be shown without unnecessary detail in order to avoid obscuring example embodiments.