CN209929957U - Low-power motor monitoring device - Google Patents
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- CN209929957U CN209929957U CN201920596960.7U CN201920596960U CN209929957U CN 209929957 U CN209929957 U CN 209929957U CN 201920596960 U CN201920596960 U CN 201920596960U CN 209929957 U CN209929957 U CN 209929957U
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Abstract
A low-power motor monitoring device, the voltage monitoring module is used for collecting the current data on the three-phase power line of the motor in real time and sending the collected data to the central processing unit; the current monitoring module is used for acquiring voltage data on a three-phase power supply line of the motor in real time and sending the acquired data to the central processing unit; the temperature monitoring module is used for acquiring temperature data in the motor in real time and sending the acquired data to the central processing unit; the rotating speed monitoring module is used for acquiring rotating speed data of the motor in real time and sending the acquired data to the middle processor; the central processing unit is used for processing the received data, sending the processed result to a remote monitoring center through the communication module, and controlling the alarm module to warn according to the result. The device can monitor the internal temperature, the driving current, the driving voltage and the motor speed of the motor in real time, feeds back abnormal information in time and uploads the abnormal information to a far end, and can facilitate later-stage troubleshooting and maintenance work.
Description
Technical Field
The utility model relates to a motor supervisory equipment, concretely relates to low-power motor monitoring device.
Background
The motor is used as a power source of an electric appliance or various machines, is an important part in a used system, and is influenced by a plurality of factors in the running process, for example, the iron loss and the copper loss of the motor are increased due to overhigh power voltage, so that the abnormal temperature rise and even the final burning of the motor are caused; in addition, the voltage is too low, the current is too large, the motor load is too large, the motor is burnt due to the blocking, once the motor is burnt, the production is influenced slightly, and safety accidents are caused seriously. It is therefore essential to monitor and adjust the various parameters of the motor.
The thermal relay, the contactor and the fuse used at present can only realize rough protection on the motor under specific conditions, not only has slow reaction time, but also cannot monitor, analyze and early warn in real time, and cannot inquire the historical running state after a fault occurs, so that a fault removing basis cannot be provided.
Disclosure of Invention
To the problem that above-mentioned prior art exists, the utility model provides a low-power motor monitoring device, the device can inside temperature of real-time supervision motor, drive current, driving voltage and motor speed to in time feed back and far-end upload unusual information, the later stage of can being convenient for is arranged the trouble and is overhauld work.
In order to achieve the above object, the utility model provides a low-power motor monitoring system, which comprises a voltage monitoring module, a current monitoring module, a rotating speed monitoring module, a temperature monitoring module, a communication module, an alarm module and a central processing unit;
the voltage monitoring module comprises three voltage detection units, namely a first voltage detection unit, a second voltage detection unit and a third voltage detection unit, wherein the voltage detection units comprise a Hall voltage sensor U1, a resistor R1 and a potentiometer R2, and a +15V pin, a-15V pin and a grounding pin of the Hall voltage sensor U1 are connected with +15V direct-current voltage, a-15V direct-current voltage and ground respectively; the M pin of the Hall voltage sensor U1 is connected with one fixed end of a potentiometer R2 through a resistor R1, and the other fixed end and the sliding end of the potentiometer R2 are both grounded; a V + pin and a V-pin of a Hall voltage sensor U1 in a first voltage detection unit are respectively connected with a U phase and a V phase on a three-phase power supply circuit, and a node between a resistor R1 and a potentiometer R2 in the first voltage detection unit is connected with an ADC0 acquisition pin of a central processing unit; a V + pin and a V-pin of a Hall voltage sensor U1 in the second voltage detection unit are respectively connected with a U phase and a W phase on a three-phase power supply circuit, and a node between a resistor R1 and a potentiometer R2 in the second voltage detection unit is connected with an ADC1 acquisition pin of the central processing unit; a V + pin and a V-pin of a Hall voltage sensor U1 in a third voltage detection unit are respectively connected with a V phase and a W phase on a three-phase power supply circuit, and a node between a resistor R1 and a potentiometer R2 in the third voltage detection unit is connected with an ADC2 acquisition pin of a central processing unit;
the current monitoring module comprises three current detection units, namely a first current detection unit, a second current detection unit and a third current detection unit, wherein the current detection units comprise a Hall current sensor U2, a resistor R5, a resistor R3 and a potentiometer R4, and a +15V pin, a-15V pin and a grounding pin of the Hall current sensor U2 are connected with +15V direct-current voltage, a-15V direct-current voltage and ground respectively; a V + pin of the Hall current sensor U2 is connected with one end of a resistor R5, an M pin of the Hall current sensor U2 is connected with one fixed end of a potentiometer R4 through a resistor R3, and the other fixed end and the sliding end of the potentiometer R4 are both grounded; the other end of a resistor R5 in the first current detection unit and a V-pin of a Hall current sensor U2 are connected in series with a U phase on a three-phase power supply line, and a node between a resistor R3 in the first current detection unit and a potentiometer R4 is connected with an acquisition pin of an ADC3 of the central processing unit; the other end of the resistor R5 in the second current detection unit and a V-pin of the Hall current sensor U2 are connected in series with a V phase on a three-phase power supply line, and a node between the resistor R3 in the second current detection unit and the potentiometer R4 is connected with an acquisition pin of an ADC4 of the central processing unit; the other end of a resistor R5 in the third current detection unit and a V-pin of a Hall current sensor U2 are connected in series with a W phase on a three-phase power supply line, and a node between a resistor R3 in the third current detection unit and a potentiometer R4 is connected with an acquisition pin of an ADC5 of the central processing unit;
the rotating speed monitoring module is a Hall rotating speed sensor, a V + pin and a GND pin of the Hall rotating speed sensor are respectively connected with +15V direct current voltage and ground, and a Vout1 pin and a Vout2 pin of the Hall rotating speed sensor are respectively connected with an EXT0 pin and an EXT1 pin of the central processing unit;
the temperature monitoring module comprises platinum thermal resistors R6, R7, R8 and R9, two ends of the platinum thermal resistor R6 are respectively connected with one end of a platinum thermal resistor R7 and one end of a platinum thermal resistor R8, the other end of the platinum thermal resistor R7 and the other end of the platinum thermal resistor R8 are respectively connected with two ends of a platinum thermal resistor R9, a connecting node of the platinum thermal resistors R6 and R8 is connected with a +15V direct-current power supply, a connecting node of the platinum thermal resistors R7 and R9 and a connecting node of the platinum thermal resistors R9 and R8 are grounded, and a connecting node of the platinum thermal resistor R6 and the connecting node of the R7 is connected with an ADC6 pin of the processor;
the model of the middle inner processor is STM32F0, and the middle inner processor is also connected with the communication module and the alarm module respectively; the communication module is used for establishing communication connection between the central processing unit and external equipment or a network, and the alarm module is used for giving an alarm according to the control of the central processing unit.
The resistance values of R1 and R3 are both 550 omega, and the resistance values of potentiometers R2 and R4 are both 4.7K omega; the resistance value of the resistor R5 is 37.5K omega; the platinum thermal resistors R7, R8 and R9 are all variable resistors and have resistance values of 1K omega.
The model of the Hall voltage sensor U1 is CHV-25P/400V, the model of the Hall current sensor U2 is BJHCS-K3-100A, the model of the Hall rotation speed sensor is A3144L, and the model of the platinum thermal resistor R6 is pt 100.
The utility model discloses a set up voltage monitoring module, current monitoring module, rotational speed monitoring module and temperature monitoring module, calculate the voltage in the motor main circuit respectively, storage and under-voltage and superpressure protection, calculate the current in the motor main circuit, judge whether overflow, overload or under-voltage and default phase, detect the rotational speed of motor, rotational speed anomaly when the motor takes place the default phase start and the rotational speed decline that the default phase in operation leads to makes quick response, combine voltage, current monitoring module finds the locked-rotor phenomenon in time, calculate the internal temperature of motor and find in time the intensification phenomenon that exceeds the motor insulation level, reach the purpose of protection motor, the device has realized the real-time supervision to motor internal temperature, drive current, drive voltage and motor speed, and can carry out the far-end upload of data through the network simultaneously with unusual information feedback to well inner treater, provides reference basis for later-stage obstacle removal and maintenance.
Drawings
Fig. 1 is a schematic block circuit diagram of the present invention;
fig. 2 is a circuit diagram of the medium voltage monitoring module of the present invention;
fig. 3 is a circuit diagram of the medium current monitoring module of the present invention;
fig. 4 is a circuit diagram of the rotation speed monitoring module of the present invention;
fig. 5 is a circuit diagram of the middle temperature monitoring module of the present invention.
Detailed Description
The present invention will be further explained below.
As shown in fig. 1 to 5, a low-power motor monitoring system includes a voltage monitoring module, a current monitoring module, a rotational speed monitoring module, a temperature monitoring module, a communication module, an alarm module, and a central processing unit;
the voltage monitoring module is used for acquiring current data on a three-phase power line of the motor in real time and sending the acquired data to the central processing unit; the voltage monitoring module comprises three voltage detection units, namely a first voltage detection unit, a second voltage detection unit and a third voltage detection unit, wherein the voltage detection units comprise a Hall voltage sensor U1, a resistor R1 and a potentiometer R2, and a +15V pin, a-15V pin and a grounding pin of the Hall voltage sensor U1 are connected with +15V direct-current voltage, a-15V direct-current voltage and ground respectively; the M pin of the Hall voltage sensor U1 is connected with one fixed end of a potentiometer R2 through a resistor R1, and the other fixed end and the sliding end of the potentiometer R2 are both grounded; a V + pin and a V-pin of a Hall voltage sensor U1 in a first voltage detection unit are respectively connected with a U phase and a V phase on a three-phase power supply circuit, and a node between a resistor R1 and a potentiometer R2 in the first voltage detection unit is connected with an ADC0 acquisition pin of a central processing unit; a V + pin and a V-pin of a Hall voltage sensor U1 in the second voltage detection unit are respectively connected with a U phase and a W phase on a three-phase power supply circuit, and a node between a resistor R1 and a potentiometer R2 in the second voltage detection unit is connected with an ADC1 acquisition pin of the central processing unit; a V + pin and a V-pin of a Hall voltage sensor U1 in a third voltage detection unit are respectively connected with a V phase and a W phase on a three-phase power supply circuit, and a node between a resistor R1 and a potentiometer R2 in the third voltage detection unit is connected with an ADC2 acquisition pin of a central processing unit;
the Hall voltage sensor U1 not only can perform strong electric isolation, but also can reflect the size of the primary voltage very accurately. Three-phase electric network voltage carries out the conversion back through hall voltage sensor U1(CHV-25P/400V), the output is surveyed the voltage, and link to each other with central processing unit's ADC acquisition pin behind a 550 omega resistance and a 470K ohm precision potentiometer (being adjustable resistance), central processing unit obtains the size of being surveyed the voltage through AD collection and through calculating, and utilize the formula to calculate the voltage in the motor main circuit, then record and send to the high in the clouds analysis and storage through communication module, with maintenance and the mistake alignment of convenient later stage. Meanwhile, the hall voltage sensor U1 operates when the voltage in the main circuit exceeds or falls below the set motor operating range to complete under-voltage and over-voltage protection, and if a phase is open, which may cause phase loss, the voltage of a certain two phases may also be reduced, and which phase power supply is open can be known by comparing the voltages.
The current monitoring module is used for acquiring voltage data on a three-phase power supply line of the motor in real time and sending the acquired data to the central processing unit; the current monitoring module comprises three current detection units, namely a first current detection unit, a second current detection unit and a third current detection unit, wherein the current detection units comprise a Hall current sensor U2, a resistor R5, a resistor R3 and a potentiometer R4, and a +15V pin, a-15V pin and a grounding pin of the Hall current sensor U2 are connected with +15V direct-current voltage, a-15V direct-current voltage and ground respectively; a V + pin of the Hall current sensor U2 is connected with one end of a resistor R5, an M pin of the Hall current sensor U2 is connected with one fixed end of a potentiometer R4 through a resistor R3, and the other fixed end and the sliding end of the potentiometer R4 are both grounded; the other end of a resistor R5 in the first current detection unit and a V-pin of a Hall current sensor U2 are connected in series with a U phase on a three-phase power supply line, and a node between a resistor R3 in the first current detection unit and a potentiometer R4 is connected with an acquisition pin of an ADC3 of the central processing unit; the other end of the resistor R5 in the second current detection unit and a V-pin of the Hall current sensor U2 are connected in series with a V phase on a three-phase power supply line, and a node between the resistor R3 in the second current detection unit and the potentiometer R4 is connected with an acquisition pin of an ADC4 of the central processing unit; the other end of a resistor R5 in the third current detection unit and a V-pin of a Hall current sensor U2 are connected in series with a W phase on a three-phase power supply line, and a node between a resistor R3 in the third current detection unit and a potentiometer R4 is connected with an acquisition pin of an ADC5 of the central processing unit;
after the three-phase grid current is isolated and converted by the Hall current sensor U2, the three-phase grid current is transmitted to an ADC pin of a central processing unit through a 550 ohm resistor and a 4.7K precision potentiometer (namely an adjustable resistor), the central processing unit obtains the voltage on the pin through internal calculation, and therefore the size of the three-phase grid current is obtained, if the current of a certain phase is suddenly increased or reduced, the result is obtained by analyzing in combination with the voltage and the rotating speed, whether overcurrent, overload or undervoltage and phase failure is judged, and in combination with a voltage protection circuit system and a rotating speed monitoring system, the rated occurrence of a phase failure event can be accurately and rapidly found, and warning and action are timely carried out, and meanwhile, the occurrence of current overcurrent can also be detected.
The rotating speed monitoring module is used for acquiring rotating speed data of the motor in real time and sending the acquired data to the middle processor; the rotating speed monitoring module is a Hall rotating speed sensor, a V + pin and a GND pin of the Hall rotating speed sensor are respectively connected with +15V direct current voltage and ground, and a Vout1 pin and a Vout2 pin of the Hall rotating speed sensor are respectively connected with an EXT0 pin and an EXT1 pin of the central processing unit;
the motor transmission shaft is provided with at least one pair of magnetic poles, the Hall rotation speed sensor is arranged in the range of the motor magnetic field, the pin of the Hall rotation speed sensor is connected with the high-speed counting pin of the single chip microcomputer, when the Hall rotation speed sensor senses the magnetic field, the pin outputs a low level, when the Hall rotation speed sensor does not sense the magnetic field, the pin outputs a high level, the pin of the Hall rotation speed sensor is connected to the high-speed counting pin of the central processing unit, the rotation speed of the motor can be obtained by calculating the number of pulses, and if the precision is increased, a plurality of magnetic poles are; the detection of the rotating speed can directly obtain the working state of the motor, can quickly respond to the phenomena of abnormal rotating speed when the motor is started in a phase-lacking manner and rotating speed reduction caused by the phase-lacking manner during running, and can timely find the occurrence of a locked rotor phenomenon by combining a voltage protection circuit system and a current protection circuit system.
The temperature monitoring module is used for acquiring temperature data in the motor in real time and sending the acquired data to the central processing unit; the temperature monitoring module comprises platinum thermal resistors R6, R7, R8 and R9, two ends of the platinum thermal resistor R6 are respectively connected with one end of a platinum thermal resistor R7 and one end of a platinum thermal resistor R8, the other end of the platinum thermal resistor R7 and the other end of the platinum thermal resistor R8 are respectively connected with two ends of a platinum thermal resistor R9, a connecting node of the platinum thermal resistors R6 and R8 is connected with a +15V direct-current power supply, a connecting node of the platinum thermal resistors R7 and R9 and a connecting node of the platinum thermal resistors R9 and R8 are grounded, and a connecting node of the platinum thermal resistor R6 and the connecting node of the R7 is connected with an ADC6 pin of the processor;
the four platinum thermal resistors form a bridge circuit to measure the temperature, the temperature measurement precision is high, the stability is good, the temperature measurement range is wide, the temperature change only affects the resistance value, the change of the output voltage after being processed by the bridge circuit reflects the temperature change through the change of the voltage, and the voltage conversion relationship is as follows:
the resistance value of the platinum thermal resistor can be calculated according to the formula, so that the current temperature of the motor can be calculated, whether the temperature rises and exceeds the temperature which can be borne by the insulation grade of the motor can be known after the current temperature is compared with the historical temperature, and signals are transmitted to the single chip microcomputer to be processed, so that the motor can be protected better.
The model of the middle inner processor is STM32F0, and the middle inner processor is also connected with the communication module and the alarm module respectively; the communication module is used for establishing communication connection between the central processing unit and external equipment or a network, and the alarm module is used for giving an alarm according to the control of the central processing unit. The central processing unit is used for processing the received data, sending a processing result to a remote monitoring center through the communication module, and simultaneously controlling the alarm module to warn and remind in time according to the processing result; the communication module can be a wireless communication module, and the alarm module can be a voice alarm module.
Preferably, the resistance values of R1 and R3 are both 550 Ω, and the resistance values of potentiometers R2 and R4 are both 4.7K Ω; the resistance value of the resistor R5 is 37.5K omega; the platinum thermal resistors R7, R8 and R9 are all variable resistors and have resistance values of 1K omega.
Preferably, the model of the Hall voltage sensor U1 is CHV-25P/400V, the model of the Hall current sensor U2 is BJHCS-K3-100A, the model of the Hall speed sensor is A3144L, and the model of the platinum thermal resistor R6 is pt 100.
Claims (3)
1. A low-power motor monitoring device is characterized by comprising a voltage monitoring module, a current monitoring module, a rotating speed monitoring module, a temperature monitoring module, a communication module, an alarm module and a central processing unit;
the voltage monitoring module comprises three voltage detection units, namely a first voltage detection unit, a second voltage detection unit and a third voltage detection unit, wherein the voltage detection units comprise a Hall voltage sensor U1, a resistor R1 and a potentiometer R2, and a +15V pin, a-15V pin and a grounding pin of the Hall voltage sensor U1 are connected with +15V direct-current voltage, a-15V direct-current voltage and ground respectively; the M pin of the Hall voltage sensor U1 is connected with one fixed end of a potentiometer R2 through a resistor R1, and the other fixed end and the sliding end of the potentiometer R2 are both grounded; a V + pin and a V-pin of a Hall voltage sensor U1 in a first voltage detection unit are respectively connected with a U phase and a V phase on a three-phase power supply circuit, and a node between a resistor R1 and a potentiometer R2 in the first voltage detection unit is connected with an ADC0 acquisition pin of a central processing unit; a V + pin and a V-pin of a Hall voltage sensor U1 in the second voltage detection unit are respectively connected with a U phase and a W phase on a three-phase power supply circuit, and a node between a resistor R1 and a potentiometer R2 in the second voltage detection unit is connected with an ADC1 acquisition pin of the central processing unit; a V + pin and a V-pin of a Hall voltage sensor U1 in a third voltage detection unit are respectively connected with a V phase and a W phase on a three-phase power supply circuit, and a node between a resistor R1 and a potentiometer R2 in the third voltage detection unit is connected with an ADC2 acquisition pin of a central processing unit;
the current monitoring module comprises three current detection units, namely a first current detection unit, a second current detection unit and a third current detection unit, wherein the current detection units comprise a Hall current sensor U2, a resistor R5, a resistor R3 and a potentiometer R4, and a +15V pin, a-15V pin and a grounding pin of the Hall current sensor U2 are connected with +15V direct-current voltage, a-15V direct-current voltage and ground respectively; a V + pin of the Hall current sensor U2 is connected with one end of a resistor R5, an M pin of the Hall current sensor U2 is connected with one fixed end of a potentiometer R4 through a resistor R3, and the other fixed end and the sliding end of the potentiometer R4 are both grounded; the other end of a resistor R5 in the first current detection unit and a V-pin of a Hall current sensor U2 are connected in series with a U phase on a three-phase power supply line, and a node between a resistor R3 in the first current detection unit and a potentiometer R4 is connected with an acquisition pin of an ADC3 of the central processing unit; the other end of the resistor R5 in the second current detection unit and a V-pin of the Hall current sensor U2 are connected in series with a V phase on a three-phase power supply line, and a node between the resistor R3 in the second current detection unit and the potentiometer R4 is connected with an acquisition pin of an ADC4 of the central processing unit; the other end of a resistor R5 in the third current detection unit and a V-pin of a Hall current sensor U2 are connected in series with a W phase on a three-phase power supply line, and a node between a resistor R3 in the third current detection unit and a potentiometer R4 is connected with an acquisition pin of an ADC5 of the central processing unit;
the rotating speed monitoring module is a Hall rotating speed sensor, a V + pin and a GND pin of the Hall rotating speed sensor are respectively connected with +15V direct current voltage and ground, and a Vout1 pin and a Vout2 pin of the Hall rotating speed sensor are respectively connected with an EXT0 pin and an EXT1 pin of the central processing unit;
the temperature monitoring module comprises platinum thermal resistors R6, R7, R8 and R9, two ends of the platinum thermal resistor R6 are respectively connected with one end of a platinum thermal resistor R7 and one end of a platinum thermal resistor R8, the other end of the platinum thermal resistor R7 and the other end of the platinum thermal resistor R8 are respectively connected with two ends of a platinum thermal resistor R9, a connecting node of the platinum thermal resistors R6 and R8 is connected with a +15V direct-current power supply, a connecting node of the platinum thermal resistors R7 and R9 and a connecting node of the platinum thermal resistors R9 and R8 are grounded, and a connecting node of the platinum thermal resistor R6 and the connecting node of the R7 is connected with an ADC6 pin of the processor;
the model of the middle inner processor is STM32F0, and the middle inner processor is also connected with the communication module and the alarm module respectively; the communication module is used for establishing communication connection between the central processing unit and external equipment or a network, and the alarm module is used for giving an alarm according to the control of the central processing unit.
2. The low power motor monitoring device of claim 1, wherein the R1 and R3 resistors are both 550 Ω, and the R2 and R4 resistors are both 4.7K Ω; the resistance value of the resistor R5 is 37.5K omega; the platinum thermal resistors R7, R8 and R9 are all variable resistors and have resistance values of 1K omega.
3. A low power motor monitoring device as claimed in claim 1 or 2, wherein the hall voltage sensor U1 is of the type CHV-25P/400V, the hall current sensor U2 is of the type BJHCS-K3-100A, the hall speed sensor is of the type a3144L, and the platinum thermistor R6 is of the type pt 100.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021227343A1 (en) * | 2020-05-11 | 2021-11-18 | 卧龙电气驱动集团股份有限公司 | Permanent magnet synchronous motor capable of performing stalling and phase loss protection, and protection method therefor |
| CN114019373A (en) * | 2021-11-01 | 2022-02-08 | 常州机电职业技术学院 | Efficient servo motor automatic test system |
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2019
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021227343A1 (en) * | 2020-05-11 | 2021-11-18 | 卧龙电气驱动集团股份有限公司 | Permanent magnet synchronous motor capable of performing stalling and phase loss protection, and protection method therefor |
| CN114019373A (en) * | 2021-11-01 | 2022-02-08 | 常州机电职业技术学院 | Efficient servo motor automatic test system |
| CN114019373B (en) * | 2021-11-01 | 2022-06-07 | 常州机电职业技术学院 | Efficient servo motor automatic test system |
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