CN209860841U - Variable frequency motor for fuel boiler desalination and water circulation - Google Patents

Abstract

The utility model discloses a belong to fuel boiler water cycle technical field, specifically be a inverter motor for fuel boiler removes salt, hydrologic cycle, including power frequency motor, inverter circuit and master control circuit, master control circuit output drive inverter circuit, inverter circuit connects on power frequency motor's input interface, inverter circuit includes rectification part, energy storage part and contravariant part, the rectification part includes three rectification way that connects in parallel each other, the rectification way includes diode D1 who establishes ties between two positive negative poles, three between two diodes D1 of rectification way respectively with the interface connection of frequency conversion looks R, S, T, the energy storage part includes electric capacity C1 and electric capacity C2 that establish ties each other, realizes the speed governing of motor to the operating frequency of adjustment motor, further can adjust fuel boiler hydrologic cycle's pressure and flow, the device is suitable for different use conditions; according to the use condition, the service efficiency can be improved or the service life can be prolonged.

Description

Variable frequency motor for fuel boiler desalination and water circulation

Technical Field

The utility model relates to a fuel boiler water cycle technical field specifically is a inverter motor who is used for fuel boiler desalination, hydrologic cycle.

Background

The boiler is an energy conversion device, the energy input to the boiler comprises chemical energy and electric energy in fuel, and the boiler outputs steam, high-temperature water or an organic heat carrier with certain heat energy.

The boiler is a water container heated on fire, a furnace is a place where fuel is combusted, and the boiler comprises a boiler and a furnace. The hot water or steam generated in the boiler can directly provide heat energy for industrial production and people life, and can also be converted into mechanical energy through a steam power device, or the mechanical energy is converted into electric energy through a generator. The boiler for supplying hot water is called a hot water boiler, is mainly used for life, and has a small amount of application in industrial production. The boiler for generating steam is called as a steam boiler, often called as a boiler for short, and is widely used for thermal power stations, ships, locomotives and industrial and mining enterprises.

As the boiler operates along with the change of external load, the demineralized water pump needs to correspondingly adjust the outlet pressure and the flow of the water pump. In order to solve the problem that the power output of the power frequency motor cannot be adjusted when the power frequency motor runs, the power frequency motor needs to be changed into a variable frequency motor.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an inverter motor for fuel boiler desalination, hydrologic cycle to the problem of proposing in solving above-mentioned background art because along with external load's change during the boiler operation, demineralized water pump needs corresponding regulation water pump outlet pressure and flow.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a inverter motor for fuel boiler removes salt, hydrologic cycle, includes power frequency motor, inverter circuit and master control circuit, master control circuit output drive inverter circuit, inverter circuit connects on power frequency motor's input interface, inverter circuit includes rectification part, energy storage part and contravariant part, the rectification part includes three rectifier circuit that connects in parallel each other, rectifier circuit includes diode D1 of series connection between two positive negative poles, and is three respectively with the interface connection of frequency conversion looks R, S, T between two diode D1 of rectifier circuit, energy storage part includes electric capacity C1 and electric capacity C2 that establish ties each other, contravariant part includes three contravariant circuit, the contravariant circuit includes two triode VT, one of them the projecting pole of triode VT passes through the wire with another triode VT's collecting electrode and is connected, the projecting pole of triode VT and the last collecting electrode are respectively through positive pole, the positive pole of diode D2, the negative pole of diode D2, The negative pole is connected, two triodes VT of the three inverter circuits are respectively connected with U, V, W output, and the rectification part, the energy storage part and the inverter part are connected in parallel.

Preferably, the inverting part is also connected with a capacitor C3 in parallel.

Preferably, the frequency conversion circuit further comprises a brake protection circuit.

Compared with the prior art, the beneficial effects of the utility model are that:

1) the speed regulation of the motor is realized, so that the working frequency of the motor is regulated, the pressure and the flow of the water circulation of the fuel boiler can be further regulated, and the device is suitable for different use conditions;

2) according to the use condition, the service efficiency can be improved or the service life can be prolonged.

Drawings

Fig. 1 is a schematic circuit diagram of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Example (b):

referring to fig. 1, the present invention provides a technical solution: a variable frequency motor for fuel boiler desalination and water circulation comprises a power frequency motor, a variable frequency circuit and a main control circuit, wherein the main control circuit outputs and drives the variable frequency circuit, the variable frequency circuit is connected to an input interface of the power frequency motor, the variable frequency circuit comprises a rectifying part, an energy storage part and an inversion part, the rectifying part comprises three rectifying circuits which are connected in parallel, each rectifying circuit comprises a diode D1 which is connected between two positive electrodes and two negative electrodes in series, the two diodes D1 of the three rectifying circuits are respectively connected with an interface of a variable frequency phase R, S, T, the energy storage part comprises a capacitor C1 and a capacitor C2 which are connected in series, the inversion part comprises three inversion circuits, each inversion circuit comprises two triodes VT, an emitting electrode of one triode VT is connected with a collecting electrode of the other triode VT through a lead, the emitting electrode and the collecting electrode of the triode VT are respectively connected with the, The negative pole is connected, and two triode VT of three inverter circuit are connected with U, V, W output respectively, and parallelly connected between rectification part, energy storage part and the inverter part.

The inverting part is also connected in parallel with a capacitor C3.

The frequency conversion circuit also comprises a brake protection circuit.

The working principle is as follows: the power frequency power supply input by the rectifying part is converted into a direct current power supply;

the DC power of the inversion part is converted into AC power with required frequency, and 6 switching devices formed by 6 transistors VT and diodes D2 are switched on and off in determined time to obtain three-phase AC output.

Having shown and described the basic principles and principal features of the invention and advantages thereof, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof; the present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not intended to be construed as limiting the claim concerned.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (3)

1. The utility model provides a variable frequency motor for fuel boiler desalination, hydrologic cycle, includes power frequency motor, inverter circuit and master control circuit, its characterized in that: the main control circuit outputs and drives the frequency conversion circuit, the frequency conversion circuit is connected to an input interface of a power frequency motor, the frequency conversion circuit comprises a rectification part, an energy storage part and an inversion part, the rectification part comprises three rectification circuits which are connected in parallel, the rectification circuit comprises two diodes D1 which are connected in series between an anode and a cathode, the three diodes D1 of the rectification circuit are connected with an interface of a frequency conversion phase R, S, T, the energy storage part comprises a capacitor C1 and a capacitor C2 which are connected in series, the inversion part comprises three inversion circuits, the inversion circuits comprise two triodes VT, an emitter electrode of one triode VT is connected with a collector electrode of the other triode VT through a lead, the emitter electrode and the collector electrode of the triode VT are connected with the anode and the cathode of a diode D2 through leads, and the three triodes VT of the inversion circuits are connected with a U, a U and a negative electrode, V, W output phase is connected, and the rectification part, the energy storage part and the inversion part are connected in parallel.

2. The variable frequency motor for fuel boiler desalination and water circulation as claimed in claim 1, wherein: the inverting part is also connected with a capacitor C3 in parallel.

3. The variable frequency motor for fuel boiler desalination and water circulation as claimed in claim 1, wherein: the frequency conversion circuit further comprises a brake protection circuit.