Circuit of variable-frequency direct-drive industrial fan

Abstract

The utility model relates to a circuit of frequency conversion direct drive industrial fan, including control circuit, general power supply, motor, frequency conversion input line and fan, general power supply and control circuit electrical connection, motor and control circuit electrical connection, frequency conversion input line and control circuit electrical connection, fan and control circuit electrical connection, frequency conversion input line and control circuit electrical connection, fan and control circuit electrical connection. The main power supply supplies power to the control circuit and inputs frequency conversion signals to the motor through the frequency conversion input line. According to the circuit of the variable-frequency direct-drive industrial fan, the fan is directly driven by the motor to rotate, a transmission part in a traditional industrial fan is omitted, energy consumption is reduced, working efficiency is improved, and maintenance cost is reduced.

Description

Technical Field

[0001] The utility model belongs to the field of circuits, and in particular relates to a circuit for a variable frequency direct-driven industrial fan. Background Art

[0002] Traditional industrial fans are driven by electric motors. When the fan blades rotate, the motor must first be connected to transmission devices such as couplings and reducers. When used too many times, these transmission components will face replacement, damage, and maintenance. This will undoubtedly increase the cost of subsequent repairs and maintenance. This design method has high energy loss and low efficiency. Summary of the invention

[0003] The utility model aims to solve the shortcomings in the prior art and proposes a frequency conversion direct-drive industrial fan circuit.

[0004] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a circuit of a variable frequency direct-drive industrial fan, comprising a control circuit, a main power supply, a motor, a variable frequency input line and a fan, the main power supply is electrically connected to the control circuit, the motor is electrically connected to the control circuit, the variable frequency input line is electrically connected to the control circuit, the fan is electrically connected to the control circuit, the main power supply provides power for the control circuit, and inputs a variable frequency signal to the motor through the variable frequency input line.

[0005] In the present application, a manual speed control circuit is also included. The manual speed control circuit is electrically connected to the control circuit. The signal output by the manual speed control circuit is manually controlled to manually control the rotation speed of the motor.

[0006] In the present application, a potentiometer is also included, the potentiometer is electrically connected to the control circuit, and the potentiometer is used for voltage division.

[0007] In the present application, a motor protection switch is also included, one end of which is electrically connected to the main power supply, and the other end is directly connected to the main wiring. The motor protection switch is used to protect the motor. When the current in the control circuit is overloaded, the motor protection switch is disconnected and the motor stops rotating.

[0008] In the present application, an indicator light is also included, one end of the indicator light is electrically connected to the control circuit, and the other end is electrically connected to the motor protection switch. When the entire fan is operating normally, the indicator light is on, and when the fan stops rotating and the motor protection switch is disconnected, the indicator light is off.

[0009] In the present application, the motor is a three-phase motor.

[0010] The beneficial effect of the present application is that the circuit of the variable frequency direct-drive industrial fan provided by the present application directly drives the fan to rotate by an electric motor, eliminating the transmission components in traditional industrial fans, thereby reducing energy consumption, improving work efficiency, and reducing maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 The utility model provides a circuit diagram of a variable frequency direct-drive industrial fan. DETAILED DESCRIPTION

[0012] The present application is further described in detail below by specific embodiments in conjunction with the accompanying drawings. Wherein similar elements in different embodiments adopt associated similar element numbers. In the following embodiments, many detailed descriptions are intended to enable the present application to be better understood. However, those skilled in the art can easily recognize that some of the features can be omitted in different situations, or can be replaced by other elements, materials, and methods. In some cases, some operations related to the present application are not shown or described in the specification, in order to avoid the core part of the present application being overwhelmed by too much description, and for those skilled in the art, it is not necessary to describe these related operations in detail, and they can fully understand the related operations based on the description in the specification and the general technical knowledge in the art.

[0013] In addition, the features, operations or characteristics described in the specification can be combined in any appropriate manner to form various implementations, and the operation steps involved in each embodiment can also be replaced or adjusted in a sequence in a manner that is obvious to those skilled in the art. Therefore, the specification and drawings are only for the purpose of clearly describing a certain embodiment and do not mean that the composition and / or sequence are necessary.

[0014] The serial numbers of the components in this document, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings).

[0015] Please refer to Figure 1 The present application provides a circuit for a variable frequency direct-drive industrial fan, the circuit comprising a control circuit 1, a main power supply 4, a motor 2, a variable frequency input line 6 and a fan 3, the main power supply 4 is electrically connected to the control circuit 1, the motor 2 is electrically connected to the control circuit 1, the variable frequency input line 6 is electrically connected to the control circuit 1, the fan 3 is electrically connected to the control circuit 1, the main power supply 4 provides power for the control circuit 1, and inputs a variable frequency signal to the motor 2 through the variable frequency input line 6.

[0016] The circuit further comprises a manual speed regulating circuit 7 , which is electrically connected to the control circuit 1 , and the rotation speed of the motor 2 is manually controlled by manually controlling the signal output by the manual speed regulating circuit 7 .

[0017] The circuit further comprises a potentiometer 8 , which is electrically connected to the control circuit 1 and is used for voltage division.

[0018] The circuit also includes a motor protection switch 5, one end of which is electrically connected to the main power supply 4, and the other end is directly connected to the main wiring. The motor protection switch 5 is used to protect the motor 2. When the current in the control circuit 1 is overloaded, the motor protection switch 5 is disconnected and the motor 2 stops rotating.

[0019] The circuit also includes an indicator light 9, one end of which is electrically connected to the control circuit 1, and the other end is electrically connected to the motor protection switch 5. When the entire fan 3 operates normally, the indicator light 9 is on, and when the fan 3 stops rotating and the motor protection switch is disconnected, the indicator light 9 is off.

[0020] The motor 2 is a three-phase motor.

[0021] The circuit of the variable frequency direct-drive industrial fan provided in the present application is driven directly by an electric motor to rotate the fan, eliminating the transmission components in traditional industrial fans, thereby reducing energy consumption, improving work efficiency, and reducing maintenance costs.

[0022] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with the technology to understand the content of the utility model and implement it accordingly, and they cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A variable frequency direct drive industrial fan circuit, characterized in that: The invention comprises a control circuit, a main power supply, a motor, a variable frequency input line and a fan, wherein the main power supply is electrically connected to the control circuit, the motor is electrically connected to the control circuit, the variable frequency input line is electrically connected to the control circuit, and the fan is electrically connected to the control circuit. The main power supply provides power for the control circuit, and a variable frequency signal is input to the motor through the variable frequency input line.

2. The circuit of the variable frequency direct drive industrial fan according to claim 1, characterized in that: It also includes a manual speed regulation circuit, which is electrically connected to the control circuit. The signal output by the manual speed regulation circuit is manually controlled to manually control the rotation speed of the motor.

3. The circuit of the variable frequency direct drive industrial fan according to claim 2, characterized in that: It also includes a potentiometer, which is electrically connected to the control circuit and is used for voltage division.

4. The circuit of the variable frequency direct drive industrial fan according to claim 3, characterized in that: It also includes a motor protection switch, one end of which is electrically connected to the main power supply, and the other end is directly connected to the main wiring. The motor protection switch is used to protect the motor. When the current in the control circuit is overloaded, the motor protection switch is disconnected and the motor stops rotating.

5. The circuit of the variable frequency direct drive industrial fan according to claim 4, characterized in that: It also includes an indicator light, one end of which is electrically connected to the control circuit, and the other end is electrically connected to the motor protection switch. When the entire fan is operating normally, the indicator light is on, and when the fan stops rotating and the motor protection switch is disconnected, the indicator light is off.

6. The circuit of the variable frequency direct drive industrial fan according to claim 5, characterized in that: The motor is a three-phase motor.

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