CN217112548U - Energy-conserving converter mobile monitoring device - Google Patents
Energy-conserving converter mobile monitoring device Download PDFInfo
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- CN217112548U CN217112548U CN202220437654.0U CN202220437654U CN217112548U CN 217112548 U CN217112548 U CN 217112548U CN 202220437654 U CN202220437654 U CN 202220437654U CN 217112548 U CN217112548 U CN 217112548U
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Abstract
The utility model discloses an energy-conserving converter mobile monitoring device relates to energy-conserving converter technical field, include: the system comprises an environmental parameter detection module, a frequency converter detection module, a main control module, an analog voltage input module, an energy-saving frequency converter module and a communication module; the environment parameter detection module detects environment humiture condition and dust condition, and converter detection module detects the current signal and the voltage signal of direct current side, and main control module and control module work, analog voltage input module simulation alternating current, and energy-conserving converter module carries out rectification filtering and frequency conversion, and communication module and monitor terminal communicate. The utility model discloses energy-conserving converter removes monitoring devices can detect the operational environment of energy-conserving converter, avoids external environment's interference to detect the voltage and the electric current condition of converter direct current side through converter detection module, when voltage measurement range is great, adopt subtraction circuit to handle, reduce measuring range, integrated circuit is small, conveniently carries.
Description
Technical Field
The utility model relates to an energy-conserving converter technical field specifically is an energy-conserving converter mobile monitoring device.
Background
The energy-saving frequency converter is a power control device which controls the operation of a motor by changing the frequency of an output working power supply by applying a frequency conversion technology and a microelectronic technology, adjusts the voltage and the frequency of the output power supply by controlling the on-off of an internal transistor module, needs to monitor the energy-saving frequency converter in time for improving the stability and the safety of the energy-saving frequency converter, and continuously maintains the energy-saving frequency converter, so that a mobile monitoring device of the energy-saving frequency converter is an important component of the energy-saving frequency converter, but most energy-saving frequency converter detection devices are integrated with the monitored frequency converter, and the device is complex in structure and cannot be conveniently carried, has low detection efficiency, and cannot reasonably detect the environment and working parameters of the frequency converter, so that whether the design of the monitoring device is reasonable or not, and is directly related to the reliability and the safety of system operation.
SUMMERY OF THE UTILITY MODEL
An embodiment of the utility model provides an energy-conserving converter mobile monitoring device to solve the problem that proposes among the above-mentioned background art.
The basis the embodiment of the utility model provides an in, provide an energy-conserving converter mobile monitoring device, this energy-conserving converter mobile monitoring device includes: the system comprises an environmental parameter detection module, a frequency converter detection module, a main control module, an analog voltage input module, an energy-saving frequency converter module and a communication module;
the environment parameter detection module is connected with the main control module, and is used for detecting the temperature and humidity conditions of the environment of the energy-saving frequency converter and detecting the dust conditions around the energy-saving frequency converter;
the frequency converter detection module is connected with the main control module, and is used for detecting direct current and performing linear isolation processing on a detected current signal, detecting direct current voltage and performing linear isolation processing on a detected first voltage signal, further processing the linearly isolated first voltage signal through a subtraction circuit and outputting a second voltage signal, and detecting voltage output by the energy-saving frequency converter and outputting a third voltage signal;
the main control module is used for receiving signals output by the environmental parameter detection module and the frequency converter detection module, outputting control signals and data information and controlling the work of each module;
the analog voltage input module is used for simulating and outputting alternating current input into the energy-saving frequency converter and regulating voltage conversion of the input alternating current;
the energy-saving frequency converter module is used for performing rectification filtering and frequency conversion work;
and the communication module is used for receiving the control signal and the data information output by the main control module and establishing a wireless network to realize the wireless communication between the main control module and the monitoring terminal.
Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses energy-conserving converter removes monitoring devices can be to the operational environment temperature of energy-conserving converter through environmental parameter detection module, humidity, dust concentration detects, avoid external environment to the interference of energy-conserving converter, and detect the voltage and the electric current condition of converter direct current side through converter detection module, when direct current side voltage measurement scope is great, adopt subtraction circuit to handle, reduce measuring range, improve the resolution ratio that detects, improve the detection precision to energy-conserving converter, so that main control module carries out analysis processes, and detection circuitry simple structure, shared small, the person of facilitating the use carries.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic block diagram of a mobile monitoring device for an energy-saving frequency converter according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of an environmental parameter detection module according to an embodiment of the present invention.
Fig. 3 is a schematic diagram of a frequency converter detection module according to an embodiment of the present invention.
Fig. 4 is a circuit diagram of a dc current detecting unit according to an embodiment of the present invention.
Fig. 5 is a circuit diagram of a dc voltage detecting unit according to an embodiment 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.
Example 1: referring to fig. 1, the embodiment of the utility model provides an energy-conserving converter mobile monitoring device, this energy-conserving converter mobile monitoring device includes: the system comprises an environmental parameter detection module 1, a frequency converter detection module 2, a main control module 3, an analog voltage input module 4, an energy-saving frequency converter module 5 and a communication module 6;
specifically, the environmental parameter detection module 1 is connected with the main control module 3, and is used for detecting the temperature and humidity conditions of the environment of the energy-saving frequency converter, and detecting the dust conditions around the energy-saving frequency converter;
the frequency converter detection module 2 is connected with the main control module 3, and is used for detecting direct current and performing linear isolation processing on a detected current signal, detecting direct current voltage and performing linear isolation processing on a detected first voltage signal, further processing the linearly isolated first voltage signal through a subtraction circuit and outputting a second voltage signal, and detecting voltage output by the energy-saving frequency converter and outputting a third voltage signal;
the main control module 3 is used for receiving the signals output by the environmental parameter detection module 1 and the frequency converter detection module 2, outputting control signals and data information and controlling the work of each module;
the analog voltage input module 4 is used for simulating and outputting alternating current input into the energy-saving frequency converter and regulating voltage conversion of the input alternating current;
the energy-saving frequency converter module 5 is used for performing rectification filtering and frequency conversion work;
and the communication module 6 is used for receiving the control signal and the data information output by the main control module 3 and establishing a wireless network to realize the wireless communication between the main control module 3 and the monitoring terminal.
Furthermore, the mobile monitoring device of the energy-saving frequency converter also comprises a display module 7 and an alarm module 8;
specifically, the display module 7 is configured to receive and display data information output by the main control module 3;
the alarm module 8 is used for combining the control signal output by the main control module 3 and giving an alarm;
the display module 7 and the alarm module 8 are both connected with the main control module 3.
In a specific embodiment, the environmental parameter detection module 1 may use a temperature and humidity sensor to detect the temperature and humidity conditions of the energy-saving frequency converter during operation, and may also use a dust sensor to detect the dust concentration of the energy-saving frequency converter; the frequency converter detection module 2 may sample the voltage and current on the dc side of the frequency converter by using a sampling resistance method, and form a conditioning circuit by using an operational amplifier to condition the input signal, and may also detect the output voltage condition by using, but not limited to, a sampling resistance method, a current transformer method, a hall sensor method, etc.; the main control module 3 can adopt, but is not limited to, microcontrollers such as a single chip microcomputer and a Digital Signal Processor (DSP) to receive and process data and output control signals and data information; the analog voltage input module 4 can adopt, but is not limited to, a frequency converter, a voltage regulator and other voltage regulation devices to realize the regulation of voltage; the energy-saving frequency converter module 5 is an energy-saving frequency converter to be detected, and is not described herein again; the communication module 6 can adopt, but is not limited to, a short-distance communication device such as bluetooth communication, WiFi communication, etc. to realize data communication between the main control module 3 and the monitoring terminal; the display module 7 can adopt, but is not limited to, a liquid crystal display screen, a touch display screen and other display devices to realize the display of the detected data information; the alarm module 8 may be an audible and visual alarm, which is not described herein.
Example 2: on the basis of embodiment 1, please refer to fig. 2 and fig. 3, in a specific embodiment of the mobile monitoring device for an energy-saving frequency converter according to the present invention, as shown in fig. 2, the environment parameter detecting module 1 includes a temperature and humidity detecting unit 101 and a dust detecting unit 102;
specifically, the temperature and humidity detection unit 101 is configured to detect a temperature and a humidity of an environment of the energy-saving frequency converter;
a dust detection unit 102, configured to detect a dust situation around the energy-saving frequency converter;
the temperature and humidity detection unit 101 and the dust detection unit 102 are both connected to the main control module 3.
In a specific embodiment, the temperature and humidity detection unit 101 may use a temperature and humidity sensor to detect temperature and humidity, and the specific model is not limited; the dust detection unit 102 may use a dust sensor to detect the dust concentration in the environment, and the specific model is not limited.
Further, the frequency converter detection module 2 includes a direct current detection unit 201, a direct voltage detection unit 202 and an output voltage detection unit 203;
specifically, the dc current detection unit 201 is configured to detect a dc current and perform linear isolation processing on a detected current signal;
a dc voltage detection unit 202, configured to detect a dc voltage and perform linear isolation processing on the detected first voltage signal, and further process the linearly isolated first voltage signal through a subtraction circuit and output a second voltage signal;
an output voltage detection unit 203, configured to detect a voltage output by the energy-saving frequency converter and output a third voltage signal;
the dc current detecting unit 201, the dc voltage detecting unit 202 and the output voltage detecting unit 203 are all connected to the main control module 3.
In a specific embodiment, the dc current detecting unit 201 and the dc voltage detecting unit 202 may both detect the voltage and the current on the dc side of the frequency converter by using a sampling resistance method; the output voltage detection unit 203 can detect the output voltage by using, but not limited to, a sampling resistor method, a current transformer method, a hall sensor method, and the like.
Example 3: based on embodiment 2, please refer to fig. 4 and 5, in an embodiment of the energy-saving inverter movement monitoring apparatus of the present invention, as shown in fig. 4, the dc current detecting unit 201 includes a first probe, a first resistor R1, a second resistor R2, a first potentiometer RP1, a third resistor R3, a first diode D1, a first capacitor C1, a first operational amplifier OP1, a fourth resistor R4, a first optical coupler J1, a first power source VCC1, a fifth resistor R5, a second capacitor C2, a second operational amplifier OP2, a sixth resistor R6, and a third capacitor C3;
the first probe is connected with a slide sheet end of a first potentiometer RP1, one end of a third resistor R3 and one end of a second resistor R2 sequentially through a first resistor R1 and a first potentiometer RP1, the other end of the third resistor R3, an anode of a first diode D1 and a non-inverting end of a first operational amplifier OP1 are all grounded, the other end of the second resistor R2 is connected with a cathode of a first diode D1 and an inverting end of the first operational amplifier OP1 and is connected with an output end of the first operational amplifier OP1 and one end of a fourth resistor R4 through a first capacitor C1, the other end of the fourth resistor R4 is connected with a second end of a first optical coupler J1, a first end of the first optical coupler J1 is connected with a first power supply VCC1, a third end of the first optical coupler J1 is connected with one end of a second capacitor C1, one end of a fifth resistor R1 and an inverting end of the second optical coupler J1, the other end of the second optical coupler J1 and the other end of the third optical coupler J1 are connected with a fourth end of the second capacitor C1 and the fourth end of the second optical coupler J1 and the fourth end of the output end of the second optical coupler J1, and the second optical coupler J1 are connected with the fourth end of the fourth optical coupler J1, and the same-end of the second optical coupler J1 are connected with the same-end of the second optical coupler J1 and the same-end of the third optical coupler J1 and the fourth end of the same-end of the second optical coupler J1 and the fourth optical coupler J1 of the third optical coupler J1 and the same-end of the fourth optical coupler J1 of the same-end of the second optical coupler J1 of the same-end of the same-resistor R1 and the same-resistor R1 of the same-end of the same-resistor R1 and the same-fourth resistor R1 of the same-resistor R1 and the same-resistor R1 are connected with the same-fourth-end of the same-fourth-resistor R1 of the same-fourth-resistor R1 of the same-fourth optical coupler J1 of the same-resistor R1 and the same-end of the same-fourth optical coupler The first terminal of C3 and the second terminal of the third capacitor C3 are grounded.
In a specific embodiment, the first operational amplifier OP1 may be an LM2904 operational amplifier, and the second operational amplifier OP2 may be an OP07 series operational amplifier; the first optical coupler J1 may be a TLP559 photocoupler.
Further, as shown in fig. 5, the dc voltage detecting unit 202 includes a second probe, a seventh resistor R7, a second potentiometer RP2, an eighth resistor R8, a second optical coupler J2, a second power source VCC2, a third potentiometer RP3, a fourth capacitor C4, and a third operational amplifier OP 3;
specifically, the second probe sequentially passes through a seventh resistor R7 and a second potentiometer RP2 and is connected with a slide end of a second potentiometer RP2, one end of an eighth resistor R8 and a first end of a second optocoupler J2, the other end of the eighth resistor R8 and a second end of the second optocoupler J2 are both grounded, a third end of the second optocoupler J2 is connected with a second power source VCC2, a fourth end of the second optocoupler J2 is connected with one end of a third potentiometer RP3 and one end of a fourth capacitor C4, the other end of the fourth capacitor C4 and the other end of the third potentiometer RP3 are both grounded, a slide end of the third potentiometer RP3 is connected with the same-phase end of a third operational amplifier OP3, and an opposite-phase end of the third operational amplifier OP3 is connected with an output end of the third operational amplifier OP 3.
Further, the dc voltage detecting unit 202 further includes a ninth resistor R9, a tenth resistor R10, a fourth operational amplifier OP4, an eleventh resistor R11, a twelfth resistor R12, a fifth operational amplifier OP5, a fourth potentiometer RP4, a thirteenth resistor R13, and a third power VCC 3;
specifically, a first end of the ninth resistor R9 is connected to one end of the tenth resistor R10 and a non-inverting end of the fourth operational amplifier OP4, the other end of the tenth resistor R10 is grounded, an output end of the fourth operational amplifier OP4 is connected to an inverting end of the fourth operational amplifier OP4 and one end of the eleventh resistor R11 through the twelfth resistor R12, the other end of the eleventh resistor R11 is connected to an output end and an inverting end of the fifth operational amplifier OP5, the non-inverting end of the fifth operational amplifier OP5 is connected to a sliding piece end of the fourth potentiometer RP4 and one end of the fourth potentiometer RP4 and is grounded through the thirteenth resistor R13, and the other end of the fourth potentiometer RP4 is connected to the third power source VCC 3.
Further, the main control module 3 includes a first controller U1, a fourteenth resistor R14, and a third optocoupler J3;
specifically, the first IO end of the first controller U1 is connected to the first end of the third optical coupler J3 through a fourteenth resistor R14, the second end of the third optical coupler J3 is grounded, the third end of the third optical coupler J3 is connected to the output end of the third operational amplifier OP3 and the second ADC end of the first controller U1, the fourth end of the third optical coupler J3 is connected to the second end of the ninth resistor R9, the first ADC end of the first controller U1 is connected to the first end of the third capacitor C3, and the third ADC end of the first controller U1 is connected to the output end of the fourth operational amplifier OP 4.
In a specific embodiment, the second optical coupler J2 and the third optical coupler J3 may be TLP559 photocouplers; the third operational amplifier OP3, the fourth operational amplifier OP4 and the fifth operational amplifier OP5 can all adopt OP07 series operational amplifiers; the first controller U1 can be selected from STC89C52 series single-chip microcomputer; the fourth OP4 and the fifth OP5 form a subtraction circuit for reducing the voltage measurement range and improving the resolution.
In the utility model relates to an energy-saving frequency converter removes monitoring devices, can detect energy-saving frequency converter's operational environment temperature, humidity, dust concentration through environmental parameter detection module 1, avoid the interference of external environment to energy-saving frequency converter, and detect the voltage and the electric current condition of converter direct current side through converter detection module 2, when direct current side voltage measurement range is great, adopt subtraction circuit to handle, reduce measurement range, improve the resolution ratio that detects, improve the detection precision to energy-saving frequency converter, specifically, first probe is connected in the direct current side of converter, detect the current signal of direct current side through first resistance R1, first potentiometre RP1, third resistance R3 and second resistance R2, and obtain a low pressure direct current signal through first fortune amplifier OP1, and convert the low pressure direct current signal into the direct current signal that becomes directly proportional with the low pressure signal through first direct current J1, the second probe is connected to the direct current side of the frequency converter, the voltage signal of the direct current side is detected through a seventh resistor R7, a second potentiometer RP2 and an eighth resistor R8, a first voltage signal is obtained through isolated transmission and linear operation processing by a second optical coupler J2, when the voltage of the direct current side to be detected exceeds a measurement range, a first controller U1 controls a third optical coupler J3 to be conducted, the first voltage signal is controlled to be processed through a fourth operational amplifier OP4 and a fifth operational amplifier OP5 and a second voltage signal is output, the fourth operational amplifier OP4 and the fifth operational amplifier OP5 form a subtraction circuit, the measurement range is narrowed, the resolution is improved, the detected current signal, the first voltage signal and the second voltage signal are transmitted to the first controller U1 for calculation processing, the voltage state is obtained through comparison with a set threshold, an overvoltage threshold, an overcurrent threshold, a short-circuit threshold and the like, and then the voltage state of the frequency converter is judged to be good or bad, and can input the alternating current signal to the energy-conserving frequency converter through the analog voltage input module 4, and can judge the good or bad of rectification filter equipment in the energy-conserving frequency converter in cooperation with the detection data information of frequency converter detection module 2, the data information that detects all will show through display module 7 and transmit for monitor terminal through communication module 6, and control alarm module 8 and report to the police when main control module 3 judges to detect unusually, and detection circuitry simple structure, shared small, the person of facilitating the use carries.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. 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. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (8)
1. The utility model provides an energy-conserving converter mobile monitoring device which characterized in that:
this energy-conserving converter mobile monitoring device includes: the system comprises an environmental parameter detection module, a frequency converter detection module, a main control module, an analog voltage input module, an energy-saving frequency converter module and a communication module;
the environment parameter detection module is connected with the main control module, and is used for detecting the temperature and humidity conditions of the environment of the energy-saving frequency converter and detecting the dust conditions around the energy-saving frequency converter;
the frequency converter detection module is connected with the main control module, and is used for detecting direct current and performing linear isolation processing on a detected current signal, detecting direct current voltage and performing linear isolation processing on a detected first voltage signal, further processing the linearly isolated first voltage signal through a subtraction circuit and outputting a second voltage signal, and detecting voltage output by the energy-saving frequency converter and outputting a third voltage signal;
the main control module is used for receiving signals output by the environmental parameter detection module and the frequency converter detection module, outputting control signals and data information and controlling the work of each module;
the analog voltage input module is used for simulating and outputting alternating current input into the energy-saving frequency converter and regulating voltage conversion of the input alternating current;
the energy-saving frequency converter module is used for performing rectification filtering and frequency conversion work;
and the communication module is used for receiving the control signal and the data information output by the main control module and establishing a wireless network to realize the wireless communication between the main control module and the monitoring terminal.
2. The energy-saving frequency converter mobile monitoring device according to claim 1, further comprising a display module and an alarm module;
the display module is used for receiving and displaying the data information output by the main control module;
the alarm module is used for combining the control signal output by the main control module and giving an alarm;
the display module and the alarm module are connected with the main control module.
3. The mobile monitoring device of the energy-saving frequency converter according to claim 1, wherein the environment parameter detection module comprises a temperature and humidity detection unit and a dust detection unit;
the temperature and humidity detection unit is used for detecting the temperature and humidity conditions of the environment of the energy-saving frequency converter;
the dust detection unit is used for detecting the dust condition around the energy-saving frequency converter;
the temperature and humidity detection unit and the dust detection unit are connected with the main control module.
4. The mobile monitoring device of the energy-saving frequency converter according to claim 1, wherein the frequency converter detection module comprises a direct current detection unit, a direct voltage detection unit and an output voltage detection unit;
the direct current detection unit is used for detecting direct current and carrying out linear isolation processing on a detected current signal;
the direct-current voltage detection unit is used for detecting direct-current voltage, performing linear isolation processing on the detected first voltage signal, further processing the linearly isolated first voltage signal through a subtraction circuit and outputting a second voltage signal;
the output voltage detection unit is used for detecting the voltage output by the energy-saving frequency converter and outputting a third voltage signal;
the direct current detection unit, the direct voltage detection unit and the output voltage detection unit are all connected with the main control module.
5. The mobile monitoring device of claim 4, wherein the direct current detection unit comprises a first probe, a first resistor, a second resistor, a first potentiometer, a third resistor, a first diode, a first capacitor, a first operational amplifier, a fourth resistor, a first optocoupler, a first power supply, a fifth resistor, a second capacitor, a second operational amplifier, a sixth resistor, and a third capacitor;
the first probe is connected with a slide sheet end of a first potentiometer, one end of a third resistor and one end of a second resistor sequentially through a first resistor and the first potentiometer, the other end of the third resistor, an anode of a first diode and a non-inverting end of a first operational amplifier are all grounded, the other end of the second resistor is connected with a cathode of the first diode and an inverting end of the first operational amplifier and is connected with an output end of the first operational amplifier and one end of a fourth resistor through a first capacitor, the other end of the fourth resistor is connected with a second end of a first optocoupler, a first end of the first optocoupler is connected with a first power supply, a third end of the first optocoupler is connected with one end of a second capacitor, one end of a fifth resistor and an inverting end of the second operational amplifier, the non-inverting end of the second operational amplifier and a fourth end of the first optocoupler are all grounded, an output end of the second operational amplifier is connected with the other end of the fifth resistor and the other end of the second capacitor and is connected with a first end of the third capacitor through a sixth resistor, the second end of the third capacitor is grounded.
6. The mobile monitoring device of the energy-saving frequency converter according to claim 5, wherein the direct current voltage detection unit comprises a second probe, a seventh resistor, a second potentiometer, an eighth resistor, a second optical coupler, a second power supply, a third potentiometer, a fourth capacitor and a third operational amplifier;
the second probe is connected with the slide sheet end of the second potentiometer through the seventh resistor and the second potentiometer in sequence, one end of the eighth resistor is connected with the first end of the second optocoupler in sequence, the other end of the eighth resistor is grounded with the second end of the second optocoupler, the third end of the second optocoupler is connected with the second power supply, the fourth end of the second optocoupler is connected with one end of the third potentiometer and one end of the fourth capacitor, the other end of the fourth capacitor is grounded with the other end of the third potentiometer, the slide sheet end of the third potentiometer is connected with the same-phase end of the third operational amplifier, and the reverse-phase end of the third operational amplifier is connected with the output end of the third operational amplifier.
7. The mobile monitoring device of claim 6, wherein the dc voltage detecting unit further comprises a ninth resistor, a tenth resistor, a fourth operational amplifier, an eleventh resistor, a twelfth resistor, a fourth operational amplifier, a fifth operational amplifier, a fourth potentiometer, a thirteenth resistor, and a third power supply;
the first end of the ninth resistor is connected with one end of a tenth resistor and the in-phase end of the fourth operational amplifier, the other end of the tenth resistor is grounded, the output end of the fourth operational amplifier is connected with the inverted end of the fourth operational amplifier and one end of the eleventh resistor through a twelfth resistor, the other end of the eleventh resistor is connected with the output end and the inverted end of the fifth operational amplifier, the in-phase end of the fifth operational amplifier is connected with the slide terminal of the fourth potentiometer and one end of the fourth potentiometer and is grounded through a thirteenth resistor, and the other end of the fourth potentiometer is connected with a third power supply.
8. The mobile monitoring device of the energy-saving frequency converter according to claim 7, wherein the main control module comprises a first controller, a fourteenth resistor and a third optocoupler;
the first IO end of first controller passes through the first end of fourteenth resistance connection third opto-coupler, and the second end ground connection of third opto-coupler, the third end connection of third opto-coupler the output that third fortune was put and the second ADC end of first controller, the fourth end connection of third opto-coupler the second end of ninth resistance, the first ADC end connection of first controller the first end of third electric capacity, the third ADC end connection of first controller the output that fourth fortune was put.
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