CN218030744U - Fan control circuit of frequency converter - Google Patents
Fan control circuit of frequency converter Download PDFInfo
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- CN218030744U CN218030744U CN202221746255.9U CN202221746255U CN218030744U CN 218030744 U CN218030744 U CN 218030744U CN 202221746255 U CN202221746255 U CN 202221746255U CN 218030744 U CN218030744 U CN 218030744U
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Abstract
An inverter fan control circuit comprising: a control module formed by a Fan _ Start interface, a diode D1 and a resistor R1; the control module is electrically connected with the driving circuit, wherein the driving circuit comprises a triode driving circuit and an MOS (metal oxide semiconductor) tube driving circuit, a diode D2 in the triode driving circuit is in common-anode connection with a diode D1 on the control module, the common-anode end is connected to the output end of a resistor R1, and the input end of the resistor R1 is electrically connected with the power module; the input end of the MOS tube driving circuit is electrically connected with a power supply through a resistor R2; the input end of a resistor R5 in the MOS tube driving circuit is electrically connected with the output end of a resistor R2, and the output end of the resistor R2 is also connected with a collector C of a triode; the output end of the MOS tube driving circuit is electrically connected with a terminal 1 of a fan interface J1, wherein the terminal 1 of the fan interface J1 is connected with a power supply module through a diode D3. The utility model discloses the beneficial effect who reaches is: the control cost of the frequency converter cooling fan is reduced, and the control level range is widened.
Description
Technical Field
The utility model belongs to the technical field of converter heat dissipation control and specifically relates to a converter fan control circuit.
Background
The frequency converter is an electric control device which applies the combination of frequency conversion technology and micro-electronic technology and controls an alternating current motor by changing the frequency mode of a working power supply of the motor. With the continuous improvement of the industrial automation degree, the frequency converter is widely applied. The figure of the frequency converter can be seen everywhere in metallurgy, petroleum, chemical engineering, textile, electric power and the like; the heat dissipation technology of the frequency converter also determines the environmental resistance and the service life of the frequency converter. In order to protect the safe and reliable operation of the frequency converter, a plurality of designed protection circuits and mechanisms are basic guarantee of the reliability of the frequency converter, and the key for guaranteeing the reliable operation of the frequency converter is that the frequency converter can stably and effectively keep the optimal state to work as the frequency converter and an important heat dissipation system of the frequency converter. At present, the frequency converter is ensured to stably operate by installing a cooling fan, and the control of the cooling fan of the frequency converter is also a technical development direction. The conventional method for controlling the heat radiation fan of the existing frequency converter adopts a mode of controlling the fan to operate by adopting an isolation optocoupler to realize low level control and high level control, and although the technical scheme can achieve the control purpose, the scheme has high cost and narrow control level range, and cannot realize the control requirements of low cost and wide range.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art's shortcoming, provide a converter fan control circuit.
The purpose of the utility model is realized through the following technical scheme: an inverter fan control circuit comprising: a control module formed by a Fan _ Start interface, a diode D1 and a resistor R1;
the control module is electrically connected with a driving circuit, wherein the driving circuit comprises a triode driving circuit and an MOS (metal oxide semiconductor) tube driving circuit, a diode D2 in the triode driving circuit is connected with a common anode of a diode D1 on the control module, the common anode end is connected to the output end of a resistor R1, and the input end of the resistor R1 is electrically connected with a power module;
the input end of the MOS tube driving circuit is electrically connected with a power supply through a resistor R2; the input end of a resistor R5 in the MOS tube driving circuit is electrically connected with the output end of a resistor R2, and the output end of the resistor R2 is also connected with a collector C of a triode;
the output end of the MOS tube driving circuit is electrically connected with a terminal 1 of a fan interface J1, wherein the terminal 1 of the fan interface J1 is connected with a power supply module through a diode D3;
and the terminal 3 of the fan interface J1 is connected with a power supply module.
Preferably, the transistor driving circuit further includes: the LED lamp comprises a capacitor C1, a resistor R3 and a triode Q1, wherein the capacitor C1 is connected with the resistor R3 in parallel, the input end of the resistor C1 is connected with the cathode of the diode D2 and the base B of the triode respectively after the resistor C1 is connected with the resistor R3 in parallel, and the output end of the resistor C1 is connected with the output end of the triode after the resistor C1 is connected with the resistor R3 in parallel and is connected with the emission set E of the triode and the ground.
Preferably, the MOS transistor driving circuit further includes: the circuit comprises a resistor R5, a capacitor C2, a resistor R4 and an MOS transistor Q2, wherein the capacitor C2 is connected with the resistor R4 in parallel, and the input ends of the resistor C2 and the resistor R4 are connected with the output end of the resistor R5 and the grid G of the MOS transistor Q2 respectively after being connected in parallel;
the input end of the resistor R5 is respectively connected with the output end of the resistor R2 and the collector C of the triode Q1.
Preferably, the resistors C2 and R4 are connected in parallel, and then the output end is connected with the source and the ground of the MOS transistor Q2.
Preferably, the output terminal of the MOS transistor driving circuit is electrically connected to the terminal 1 of the fan interface J1, and includes: the drain D of the MOS transistor Q2 is connected to the terminal 1 of the fan interface J1.
Preferably, the diode D3 is two diodes connected in parallel with the same pole, the cathode of the diode is connected to the power module, and the anode of the diode is connected to the terminal 1 of the FAN interface J1, the FAN _ OUT terminal, and the drain D of the MOS transistor, respectively.
Preferably, the power module is a direct current 24-volt power supply.
The utility model discloses has following technological effect: a frequency converter fan control circuit is characterized in that a diode D2 in a triode drive circuit is connected with a common anode of a diode D1 on a control module, the common anode end is connected to the output end of a resistor R1, and the input end of the resistor R1 is electrically connected with a power module; the input end of the MOS tube driving circuit is electrically connected with a power supply through a resistor R2; the input end of a resistor R5 in the MOS tube driving circuit is electrically connected with the output end of a resistor R2, and the output end of the resistor R2 is also connected with a collector C of a triode; the output end of the MOS tube driving circuit is electrically connected with a terminal 1 of a fan interface J1, wherein the terminal 1 of the fan interface J1 is connected with a power supply module through a diode D3. The control circuit realizes the function of no need of control and isolation of a driving power supply, reduces the control cost of the radiating fan of the frequency converter, also realizes the function of level control in a wide range, solves the problem that the control parameters of a radiating fan control circuit of the frequency converter cannot be compatible under the condition of 3.3V or 5V, and realizes the level control of 3.3V-24V.
Drawings
Fig. 1 is a schematic diagram of a module structure of the present invention;
FIG. 2 is a circuit topology diagram of the present invention;
in the figure: 101-a control module, 102-a triode drive circuit, 103-a MOS tube drive circuit, 104-a fan interface J1, 105-a power module.
Detailed Description
The invention will be further described with reference to the accompanying drawings, but the scope of the invention is not limited to the following description. In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without making creative efforts belong to the protection scope of the present invention.
As shown in fig. 1 and fig. 2, an embodiment of the present invention provides a frequency converter fan control circuit, including: a control module 101 formed by a Fan _ Start interface, a diode D1 and a resistor R1; the control module 101 is electrically connected with a driving circuit, wherein the driving circuit comprises a triode driving circuit 102 and a MOS (metal oxide semiconductor) tube driving circuit 103, a diode D2 in the triode driving circuit 102 is connected with a diode D1 on the control module 101 in a common anode mode, the common anode end is connected to the output end of a resistor R1, and the input end of the resistor R1 is electrically connected with the power module 105; the input end of the MOS tube driving circuit 103 is electrically connected with a power supply through a resistor R2; the input end of a resistor R5 in the MOS tube driving circuit 103 is electrically connected with the output end of a resistor R2, and the output end of the resistor R2 is also connected with a collector C of a triode; the output end of the MOS tube driving circuit 103 is electrically connected to the terminal 1 of the fan interface J1104, wherein the terminal 1 of the fan interface J1104 is connected to the power module 105 through the diode D3; terminal 3 of fan interface J1104 is connected to power module 105.
Specifically, the Fan Start interface in the control module 101 receives the high-low level conversion to control the on-off of the NPN type triode Q1, so as to realize the on-off of the MOS transistor Q2, and further realize the switching between 24V and 0V between pin 3 and pin 1 (between Fan _ OUT and + 24V) of the terminal of the Fan interface J1104, thereby realizing the control of the Start and stop of the Fan. An input signal of the Fan _ Start interface is connected to a cathode of the diode D1, the diode D1 and the diode D2 are connected in common anode, an anode end of the diode D1 is connected to an output end of the resistor R1, and the resistor R1 is connected to the power module 105. The transistor driving circuit 102 further includes: the LED driving circuit comprises a capacitor C1, a resistor R3 and a triode Q1, wherein the capacitor C1 is connected with the resistor R3 in parallel, the input end of the resistor C1 is connected with the resistor R3 in parallel and is respectively connected to the cathode of a diode D2 and the base B of the triode, and the output end of the resistor C1 is connected with the resistor R3 in parallel and is connected to an emission set E of the triode and is connected with the ground.
The MOS transistor driving circuit 103 further includes: the resistor R5, the capacitor C2, the resistor R4 and the MOS transistor Q2 are connected in parallel, the capacitor C2 and the resistor R4 are connected in parallel, and the input ends of the parallel resistors C2 and R4 are respectively connected to the output end of the resistor R5 and the grid G of the MOS transistor Q2;
specifically, the input end of the resistor R5 is connected to the output end of the resistor R2 and the collector C of the transistor Q1, respectively. The output end of the resistor C2 is connected with the source electrode and the grounding end of the MOS transistor Q2 after the resistor C2 and the resistor R4 are connected in parallel. The output end of the MOS transistor driving circuit 103 is electrically connected to the terminal 1 of the fan interface J1104, and includes: the drain D of MOS transistor Q2 is connected to terminal 1 of fan interface J1104. The diode D3 is two diodes with the same pole connected in parallel, the cathode of the diode is connected to the power module 105, and the anode of the diode is connected to the terminal 1 of the FAN interface J1104, the FAN _ OUT terminal, and the drain D of the MOS transistor, respectively. The power module 105 of the present invention is a dc 24v power supply.
The embodiment of the utility model provides a following several kinds of control mode: in the mode 1, when the Fan needs to be controlled to run, a control signal is given to 0V through a Fan _ Start interface, a diode D1 is conducted, and the anode of the diode D1 is changed into a low level due to the conduction of the diode D1; because the NPN-type transistor Q1 is driven to be turned on by pulling up the resistor R1 and the diode D2 to 24V, the diode D2 and the diode D1 share an anode, and the cathode of the diode D2 (i.e., the base of the NPN-type transistor Q1) has no pull-up power source, and only a path from the resistor R3 to GND is provided through the capacitor C1, at this time, the diode D2 is turned off and turned on, and the NPN-type transistor Q1 cannot provide a driving power source through the diode D2, and can only pull up to GND through the resistor R3 (wherein C1 is a filter capacitor, which prevents malfunction of the transistor Q1 caused by interference), so that the NPN-type transistor Q1 is turned on and turned off. Therefore, the NPN transistor Q1 does not participate in the subsequent control operation of the circuit. Through resistance R2, R5, R4, C2 drive MOS pipe Q2, when MOS pipe Q2's grid G was high level (12 ~ 15V), MOS pipe Q2 switched on, and when MOS pipe Q2 switched on, it was the low level between MOS pipe Q2's drain electrode D utmost point and earthing terminal GND, and at this moment, the level between FAN interface J1104 terminal 3 foot and the terminal 1 foot (between FAN _ OUT and + 24V) was 24V to control FAN operation. The resistors R2 and R5 and the resistor R4 form partial pressure, so that when the G electrode of the MOS transistor Q2 is at a high level, the voltage amplitude is 12-15V; c2 is a filter capacitor, and prevents malfunction of Q2 caused by interference.
Optionally, in the mode 2, when the Fan needs to be controlled to stop operating, the control signal sets a voltage V1 (3-24V) through the Fan _ Start interface, at this time, since the NPN-type transistor Q1 is turned on through the diode D2 conduction controller, and the diode D2 conducts the anode voltage thereof to be controlled at 1.4V (the voltage is determined by the base voltage of the NPN-type transistor Q1 and the conduction voltage drop of the diode D2), the diode D1 is turned on and off because the cathode voltage V1 is higher than the anode voltage thereof (the diode D2 and the diode D1 share the anode), and the turning on and off of the diode D1 is a condition that the NPN-type transistor Q1 is turned on; after the NPN type triode Q1 is turned on, the level between the resistors R2 and R5 is pulled to a low level, which causes the base of the MOS transistor Q2 to be a low level, the MOS transistor Q2 is turned on and off, and at this time, the level between pin 3 and pin 1 (between FAN _ OUT and + 24V) of the FAN interface J1104 terminal is 0V, and the FAN stops operating. In the process of controlling the fan to stop, in order to ensure the turn-off reliability of the MOS tube, a turn-off loop of the MOS tube Q2 is formed in the turn-off loop through the series resistor R5 and the triode, so that the turn-off reliability of the MOS tube Q2 is ensured.
Optionally, when the control signal is disconnected, which shows that the Fan _ Start interface has no given constant voltage, the diode D1 is turned on and off, which is in accordance with the expectation of the circuit in the disconnection simulation state.
A frequency converter fan control circuit is characterized in that a diode D2 in a triode drive circuit 102 is connected with a diode D1 on a control module 101 in a common anode mode, the common anode end is connected to the output end of a resistor R1, and the input end of the resistor R1 is electrically connected with a power module 105; the input end of the MOS tube driving circuit 103 is electrically connected with a power supply through a resistor R2; the input end of a resistor R5 in the MOS tube driving circuit 103 is electrically connected with the output end of a resistor R2, and the output end of the resistor R2 is also connected with a collector C of a triode; the output end of the MOS transistor driving circuit 103 is electrically connected to the terminal 1 of the fan interface J1104, wherein the terminal 1 of the fan interface J1104 is connected to the power module 105 through the diode D3. The control circuit realizes the function of no need of control and isolation of a driving power supply, reduces the control cost of the radiating fan of the frequency converter, also realizes the function of level control in a wide range, solves the problem that the control parameters of a radiating fan control circuit of the frequency converter cannot be compatible under the condition of 3.3V or 5V, and realizes the level control of 3.3V-24V.
The above examples only represent preferred embodiments, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention.
Claims (7)
1. The utility model provides a converter fan control circuit which characterized in that: the method comprises the following steps: a control module formed by a Fan _ Start interface, a diode D1 and a resistor R1;
the control module is electrically connected with a driving circuit, wherein the driving circuit comprises a triode driving circuit and an MOS (metal oxide semiconductor) tube driving circuit, a diode D2 in the triode driving circuit is connected with a common anode of a diode D1 on the control module, the common anode end is connected to the output end of a resistor R1, and the input end of the resistor R1 is electrically connected with a power module;
the input end of the MOS tube driving circuit is electrically connected with a power supply through a resistor R2; the input end of a resistor R5 in the MOS tube driving circuit is electrically connected with the output end of a resistor R2, and the output end of the resistor R2 is also connected with a collector C of a triode;
the output end of the MOS tube driving circuit is electrically connected with a terminal 1 of a fan interface J1, wherein the terminal 1 of the fan interface J1 is connected with a power supply module through a diode D3;
and the terminal 3 of the fan interface J1 is connected with a power supply module.
2. The inverter fan control circuit of claim 1, wherein: the triode drive circuit further comprises: the LED lamp comprises a capacitor C1, a resistor R3 and a triode Q1, wherein the capacitor C1 is connected with the resistor R3 in parallel, the input end of the resistor C1 is connected to the cathode of the diode D2 and the base B of the triode respectively, and the output end of the resistor C1 is connected with the resistor R3 in parallel, and the output end of the resistor C1 is connected to the emission set E of the triode and is connected with the ground.
3. The inverter fan control circuit of claim 1, wherein: the MOS tube driving circuit further comprises: the circuit comprises a resistor R5, a capacitor C2, a resistor R4 and an MOS (metal oxide semiconductor) tube Q2, wherein the capacitor C2 is connected with the resistor R4 in parallel, and the input ends of the resistors C2 and R4 are respectively connected to the output end of the resistor R5 and the grid G of the MOS tube Q2 after being connected in parallel;
the input end of the resistor R5 is respectively connected with the output end of the resistor R2 and the collector C of the triode Q1.
4. The inverter fan control circuit of claim 3, wherein: and the output end of the resistor C2 is connected with the source electrode and the grounding end of the MOS transistor Q2 after the resistor C2 and the resistor R4 are connected in parallel.
5. The inverter fan control circuit of claim 1, wherein: the output of MOS pipe drive circuit is connected with fan interface J1's terminal 1 electricity, includes: the drain D of the MOS transistor Q2 is connected to the terminal 1 of the fan interface J1.
6. The inverter fan control circuit of claim 1, wherein: the diode D3 is two diodes with the same poles connected in parallel, the cathode of the diode is connected with the power module, and the anode of the diode is respectively connected with the terminal 1 of the FAN interface J1, the FAN _ OUT terminal and the drain D of the MOS tube.
7. The inverter fan control circuit of claim 1, wherein: the power supply module is a direct-current 24-volt power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221746255.9U CN218030744U (en) | 2022-07-08 | 2022-07-08 | Fan control circuit of frequency converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221746255.9U CN218030744U (en) | 2022-07-08 | 2022-07-08 | Fan control circuit of frequency converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218030744U true CN218030744U (en) | 2022-12-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221746255.9U Active CN218030744U (en) | 2022-07-08 | 2022-07-08 | Fan control circuit of frequency converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218030744U (en) |
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2022
- 2022-07-08 CN CN202221746255.9U patent/CN218030744U/en active Active
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