CN113271053B - Electric sand suction pump controller - Google Patents

Electric sand suction pump controller Download PDF

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Publication number
CN113271053B
CN113271053B CN202110816544.5A CN202110816544A CN113271053B CN 113271053 B CN113271053 B CN 113271053B CN 202110816544 A CN202110816544 A CN 202110816544A CN 113271053 B CN113271053 B CN 113271053B
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resistor
operational amplifier
terminal
detection circuit
current
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CN113271053A (en
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马海涛
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Xuzhou Northern Pump Co ltd
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Xuzhou Northern Pump Co ltd
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
    • H02P29/02—Providing protection against overload without automatic interruption of supply
    • H02P29/024—Detecting a fault condition, e.g. short circuit, locked rotor, open circuit or loss of load
    • H02P29/027—Detecting a fault condition, e.g. short circuit, locked rotor, open circuit or loss of load the fault being an over-current
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/06—Control using electricity
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
    • H02P29/02—Providing protection against overload without automatic interruption of supply
    • H02P29/024—Detecting a fault condition, e.g. short circuit, locked rotor, open circuit or loss of load
    • H02P29/028—Detecting a fault condition, e.g. short circuit, locked rotor, open circuit or loss of load the motor continuing operation despite the fault condition, e.g. eliminating, compensating for or remedying the fault
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
    • H02P29/60—Controlling or determining the temperature of the motor or of the drive

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Electric Motors In General (AREA)
  • Control Of Ac Motors In General (AREA)

Abstract

The invention discloses a controller of an electric sand suction pump, which comprises a current detection circuit and a temperature detection circuit, wherein the current detection circuit detects that a current signal detected by a current sensor U1 passes through a detector and a judger and then turns on the temperature detection circuit, and the temperature detection circuit outputs a reverse signal to a motor after a temperature signal detected by a thermistor PTCR passes through a receiver and an outputter, so that whether a rotor of the motor is in a state of clamping foreign matters or not is accurately analyzed, and the electric sand suction pump is protected.

Description

Electric sand suction pump controller
Technical Field
The invention relates to the field of electric sand suction pumps, in particular to a controller of an electric sand suction pump.
Background
The sand pump, also called sand pump, is suitable for pumping various yellow sand, ore sand, tailing slurry, slag, electric fly ash and other medium with strong abrasion.
When the motor of the electric sand suction pump is used, the motor generally enters sand or ore pulp, but when a rotor of the motor is clamped with hard impurities (such as stones and the like) or other foreign matters, the rotor of the motor can rotate, the stator current of the motor can be increased to more than five times of the rated current of the motor, and meanwhile, the motor rapidly heats up, and the motor can be damaged due to long-time clamping, but the prior art can only monitor the situation of the sand or ore pulp sucked by the motor to judge, cannot monitor the situation of the rotor of the motor, can only detect that the problem occurs when the quantity of the sand or ore pulp sucked by the motor is abnormally reduced, and needs to take out the electric sand suction pump, but cannot know the situation that the quantity of the sand or ore pulp sucked by the foreign matters clamped by the rotor of the motor is reduced at the first time, and in the process, the electric sand pump is likely to have been damaged.
The present invention therefore provides a new solution to this problem.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide the controller of the electric sand suction pump, which effectively solves the problem that the electric sand suction pump is damaged due to the fact that an effective detection mode cannot be set for the working mode of a motor of the electric sand suction pump in the prior art.
The technical scheme includes that the electric sand suction pump controller comprises a current detection circuit and a temperature detection circuit, wherein the current detection circuit detects that a current signal detected by a current sensor U1 passes through a detector and a judger and then turns on the temperature detection circuit, and the temperature detection circuit outputs a reverse signal to a motor after a temperature signal detected by a thermistor PTCR passes through a receiver and an outputter;
further, the current detection circuit includes current sensor U1, detector and judger, the current signal that current sensor U1 detected is enlargied to the detector with the current signal transmission after the enlarging to the judger, and the judger judges the current signal and opens the temperature detection circuit according to the amplitude of current signal, the temperature detection circuit includes thermistor PTCR, receiver and follower, the receiver receives the temperature signal that the temperature detection circuit detected with thermistor PTCR, and utilizes the follower to output the reversal signal and transmit to the motor.
Furthermore, the detector comprises a resistor R2, one end of the resistor R2 is connected with an out pin of a current sensor U1, the other end of the resistor R2 is respectively connected with one end of a resistor R3 and the same-phase end of an operational amplifier U2B, the inverting end of the operational amplifier U2B is respectively connected with one end of a resistor R1 and one end of a resistor R4, the output end of the operational amplifier U2B is respectively connected with the other end of the resistor R1 and the base of a triode Q1, the collector of the triode Q1 is connected with one end of a resistor R5, the other end of the resistor R5 is connected with a VCC pin of the current sensor U1 and is connected with a positive power supply VCC, the emitter of the triode Q1 is respectively connected with one end of the resistor R6 and one end of a resistor R7, the other end of the resistor R7 is connected with the same-phase end of the operational amplifier U3B, the inverting end of the operational amplifier U3B is connected with one end of a resistor R9, the other end of the resistor R9 is connected with one end of a standard signal R6 and the other end of the standard signal sensor R4 is respectively connected with one end of the same-phase of the resistor R6, The other end of the resistor R3 and the gnd pin of the current sensor U1 are connected in parallel and connected to the ground, wherein the standard signal 1 is a current signal acquired at the last moment.
Further, the determiner includes a thyristor Q2, an anode of the thyristor Q2 is connected to one end of a resistor R6 in the detector, a control electrode of the thyristor Q2 is connected to an output end of an operational amplifier U3B in the detector, a cathode of the thyristor Q2 is connected to one end of a resistor R8, the other end of the resistor R8 is connected to one end of a resistor R10 and an inverting end of an operational amplifier U4B, a non-inverting end of the operational amplifier U4B is connected to one end of a resistor R11, an output end of the operational amplifier U4B is connected to the monitoring center, a base of the transistor Q3 and a pin 1 of the multiplier V1, a pin 2 of the transistor V1 is connected to one end of the resistor R12, the other end of the resistor R12 is connected to a standard signal 2, an output end of the multiplier V1 is connected to the other end of the resistor R10, a collector of the transistor Q3 is connected to one end of the relay K1, and the other end of the relay K1 is connected to one end of the switch S1, The other end of the resistor R5 in the detector is connected with a positive polarity power supply VCC, the emitter of the triode Q3 is connected with one end of the resistor R14, the other end of the resistor R14 is connected with the other end of the resistor R11 and the other end of the resistor R6 in the detector respectively and connected with the ground in parallel, wherein the standard signal 2 is a rated current signal of a stator of the motor.
Further, the receiver comprises a resistor R13, one end of the resistor R13 is connected with the other end of a switch S1 in the current detection circuit, the other end of the resistor R13 is connected with the upper end and the adjustable end of an adjustable resistor R16 respectively, the lower end of an adjustable resistor R16 is connected with one end of a thermistor PTCR and the anode of a diode D1 respectively, the cathode of the diode D1 is connected with the in-phase end of an operational amplifier U5B, the inverting end of the operational amplifier U5B is connected with one end of the resistor R19, and the other end of the resistor R19 is connected with the output end of the operational amplifier U5B.
Further, the output device comprises an operational amplifier U6B, the non-inverting terminal of the operational amplifier U6B is connected to one end of a resistor R15 and one end of a resistor R20, the other end of the resistor R20 is connected to the output terminal of the operational amplifier U5B and the other end of a resistor R19 in the receiver, the inverting terminal of the operational amplifier U6B is connected to one end of the resistor R17, the other end of the resistor R17 is connected to the standard signal 3, the output terminal of the operational amplifier U6B is connected to the positive pole of a diode D2, the negative pole of the diode D2 is connected to one end of a resistor R18 and the 16 pin of an AND gate U7A, the other end of the resistor R18 is connected to one end of a capacitor C1 and the 1 pin of the AND gate U7A, the output terminal of the AND gate U7A is connected to one end of a resistor R21, the other end of the resistor R21 is connected to the non-inverting terminal of the operational amplifier U8B, the inverting terminal of the operational amplifier U8B is connected to the inverting terminal of the operational amplifier U8R 22, and the other end of the resistor R8B is connected to the output terminal of the operational amplifier U22, The other end of the capacitor C1 of the motor is respectively connected with the other end of the resistor R15, the other end of the thermistor RTCR in the receiver and the other end of the resistor R14 in the current detection circuit and is connected with the ground, wherein the standard signal 3 is the temperature value at the last moment.
Due to the adoption of the technical scheme, compared with the prior art, the invention has the following advantages:
the current signal and the temperature signal of the stator of the motor are detected by setting the current detection circuit and the temperature detection circuit, the detector and the judging device are set for the current signal, accurate judgment is carried out on the amplitude of the current signal, the temperature detection circuit is opened according to the amplitude of the current signal, accurate control on the temperature signal of the stator of the motor is guaranteed, meanwhile, the receiver and the output device are used for analyzing the temperature signal, whether the rotor of the motor is in a state of clamping foreign matters or not is accurately analyzed, the output device is used for outputting reverse signals to enable the motor to be reversed, and then the rotor of the motor throws the foreign matters out, so that the situation that the motor of the electric sand suction pump is damaged due to the fact that an effective detection mode cannot be set in the working mode of the motor of the electric sand suction pump in the prior art is avoided, and the electric sand suction pump is prevented from being damaged.
Drawings
Fig. 1 is a schematic circuit diagram of the present invention.
Detailed Description
The foregoing and other technical and other features and advantages of the invention will be apparent from the following detailed description of the embodiments, which proceeds with reference to fig. 1. The structural contents mentioned in the following embodiments are all referred to the attached drawings of the specification.
Exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.
An electric sand pump controller is used for controlling a motor of an electric sand pump, the controller comprises a current detection circuit and a temperature detection circuit, the current detection circuit comprises a detector and a judging device, the detector detects a current signal of a motor stator by using a current sensor U1, in order to avoid the overlarge amplitude of the current signal collected by a current sensor U1 and cause the surge phenomenon of the current detection circuit, a resistor R2 and a resistor R3 are used for carrying out voltage division processing on the current signal output by the current sensor U1 and receiving the current signal by using an operational amplifier U2B, a triode Q1 is used for carrying out follow processing on the current signal, the driving capability of the current signal is improved, the current signal is transmitted to the operational amplifier U3B and compared with a standard signal 1, when the operational amplifier U3B outputs a high level to conduct a thyristor Q2 in the judging device, the amplitude of the current signal is indicated to be increased, at the moment, the current of the stator of the motor is increased, at the moment, the thyristor Q2 transmits a current signal to a divider formed by an operational amplifier and a multiplier V1 through a resistor R8, the current signal is subjected to division operation with a standard signal 2, when a triode Q3 is conducted according to the output result of the divider, the amplitude of the current signal of the stator of the motor is larger than the amplitude of a rated current signal of the stator, the output result of the divider is output to a monitoring center, workers of the monitoring center are reminded to manage the motor, the triode Q3 conducts a relay K1, a pin switch S1 of the relay K1 is closed, and at the moment, a temperature detection circuit is started to start to detect the temperature signal of the stator on the motor; the temperature detection circuit comprises a thermistor PTCR, a receiver and an output device, wherein the receiver utilizes the thermistor PTCR, a resistor R13 and an adjustable resistor R16 to start detecting a temperature signal of a stator on the motor, the temperature signal is transmitted to an operational amplifier U5B through a diode D1 to be buffered and then transmitted to the output device, the output device utilizes a resistor R10 to transmit the temperature signal to an operational amplifier U6B to be subtracted from a standard signal 3, so that a temperature change value of the stator on the motor is calculated, the temperature change value is transmitted in two paths through a diode D2, one path is transmitted to a 16 pin of an AND gate U7A, the other path is transmitted to a pin of an AND gate 1 after being subjected to time delay processing through a resistor R18 and a capacitor C7, when the AND gate U7A outputs high level, namely the temperature of the stator on the motor is rising, the rotor of the motor is subjected to the condition of foreign matter, the high level output by the AND gate U7A is clamped at the moment, and the high level is transmitted through an operational amplifier U8B, The resistor R22 is used as an inverter to convert the positive high level into the negative high level, and the negative high level is sent to the motor to enable the motor to rotate reversely to throw out the stuck foreign matters, thereby restoring the normal working state;
the current detection circuit comprises a current sensor U1, a detector and a judger, wherein the detector detects a current signal of a motor stator by using a current sensor U1, the current sensor adopts a Hall type current sensor with the model similar to AHKC-EKDA to collect a current signal of the motor stator, in order to avoid the phenomenon that the amplitude of the current signal collected by the current sensor U1 is overlarge and causes the surge phenomenon of the current detection circuit, a resistor R2 and a resistor R3 are used for carrying out voltage division processing on the current signal output by the current sensor U1, the amplitude of the current signal is reduced, an operational amplifier U2B is used for receiving the current signal, a triode Q1 is used for carrying out follow-up processing on the current signal, the driving capability of the current signal is improved, the current signal is transmitted to the operational amplifier U3B to be compared with a standard signal 1, wherein the standard signal 1 is the current signal collected at the last moment, when the operational amplifier U3B outputs a low level and the thyristor Q2 in the judger is not turned on, it indicates that the amplitude of the current signal is not increased, that is, the current of the stator of the motor is kept unchanged, when the operational amplifier U3B outputs a high level to turn on the thyristor Q2 in the judger, it indicates that the amplitude of the current signal is increased, that is, the current of the stator of the motor is increased, at this time, the thyristor Q2 transmits the current signal to a divider formed by the operational amplifier and a multiplier V1 through a resistor R8, the current signal is divided by a standard signal 2, wherein the standard signal 2 is a rated current signal of the stator of the motor, when the result output by the divider turns on the triode Q3, it indicates that the amplitude of the current signal of the stator of the motor is larger than the amplitude of the rated current signal of the stator, and the result output by the divider is output to a monitoring center, thereby reminding a worker in the monitoring center of managing the motor, the triode Q3 conducts the relay K1, the pin switch S1 is closed, the temperature detection circuit is started at the moment, and the temperature signal of the stator on the motor is detected;
the detector comprises a resistor R2, one end of the resistor R2 is connected with an out pin of a current sensor U1, the other end of the resistor R2 is respectively connected with one end of a resistor R3 and the same-phase end of an operational amplifier U2B, the inverting end of the operational amplifier U2B is respectively connected with one end of a resistor R1 and one end of a resistor R4, the output end of the operational amplifier U2B is respectively connected with the other end of a resistor R1 and the base of a triode Q1, the collector of a triode Q1 is connected with one end of a resistor R5, the other end of the resistor R5 is connected with a VCC pin of a current sensor U1 and is connected with a positive power supply VCC, the emitter of a triode Q1 is respectively connected with one end of a resistor R6 and one end of a resistor R7, the other end of a resistor R7 is connected with the same-phase end of an operational amplifier U3B, the inverting end of the operational amplifier U3B is connected with one end of a resistor R B, the other end of the resistor R B is connected with a standard signal 1, and the other end of the resistor R B is connected with the standard signal 1, The other end of the resistor R3 and a gnd pin of the current sensor U1 are connected in parallel and grounded, wherein a standard signal 1 is a current signal acquired at the last moment;
the determiner comprises a thyristor Q2, the anode of a thyristor Q2 is connected with one end of a resistor R6 in the detector, the control pole of a thyristor Q2 is connected with the output end of an operational amplifier U3B in the detector, the cathode of a thyristor Q2 is connected with one end of a resistor R8, the other end of the resistor R8 is respectively connected with one end of a resistor R10 and the inverting end of an operational amplifier U4B, the inverting end of the operational amplifier U4B is connected with one end of a resistor R11, the output end of the operational amplifier U4B is respectively connected with a monitoring center, the base of a triode Q3 and a pin 1 of a multiplier V1, a pin 2 of the multiplier V1 is connected with one end of a resistor R12, the other end of the resistor R12 is connected with a standard signal 2, the output end of a multiplier V1 is connected with the other end of a resistor R10, the collector of the triode Q3 is connected with one end of a relay K1, the other end of a relay K1 is respectively connected with one end of a switch S1 and the other end of a positive polarity power supply VCC 5 in the detector, an emitter of the triode Q3 is connected with one end of a resistor R14, the other end of a resistor R14 is respectively connected with the other end of the resistor R11 and the other end of a resistor R6 in the detector and is connected with the ground in parallel, wherein a standard signal 2 is a rated current signal of a stator of the motor;
the temperature detection circuit comprises a thermistor PTCR, a receiver and an output device, after the temperature detection circuit is started, the receiver starts to detect a temperature signal of a stator on the motor by using the thermistor PTCR, a resistor R13 and an adjustable resistor R16, the temperature signal is transmitted to an operational amplifier U5B through a diode D1 to be buffered and then transmitted to the output device, the output device transmits the temperature signal to an operational amplifier U6B through a resistor R10 to be subtracted with a standard signal 3, wherein the standard signal 3 is a temperature value at the previous moment, so that a temperature change value of the stator on the motor is calculated, the temperature change value is transmitted in two paths through a diode D2, one path is transmitted to a 16 pin of an AND gate U7A, the other path is transmitted to a pin of the AND gate 1 after being subjected to delay processing through the resistor R18 and a capacitor C7, and when the AND gate U7A outputs a high level, the temperature of the stator on the motor is indicated to be rising, when the rotor of the motor is stuck by foreign matters, the high level output by the AND gate U7A converts the positive high level into the negative high level through the phase inverter of the operational amplifier U8B and the resistor R22, and the negative high level is sent to the motor to enable the motor to reversely rotate and throw out the stuck foreign matters, thereby recovering the normal working state;
the receiver comprises a resistor R13, one end of a resistor R13 is connected with the other end of a switch S1 in the current detection circuit, the other end of the resistor R13 is respectively connected with the upper end and the adjustable end of an adjustable resistor R16, the lower end of an adjustable resistor R16 is respectively connected with one end of a thermistor PTCR and the anode of a diode D1, the cathode of the diode D1 is connected with the in-phase end of an operational amplifier U5B, the inverting end of the operational amplifier U5B is connected with one end of the resistor R19, and the other end of the resistor R19 is connected with the output end of the operational amplifier U5B;
the output device comprises an operational amplifier U6B, the non-inverting terminal of the operational amplifier U6B is connected with one end of a resistor R15 and one end of a resistor R20, the other end of the resistor R20 is connected with the output terminal of an operational amplifier U5B and the other end of a resistor R19 in the receiver, the inverting terminal of the operational amplifier U6B is connected with one end of a resistor R17, the other end of the resistor R17 is connected with a standard signal 3, the output terminal of the operational amplifier U6B is connected with the positive pole of a diode D2, the negative pole of the diode D2 is connected with one end of a resistor R18 and the 16 pin of an AND gate U7A, the other end of the resistor R18 is connected with one end of a capacitor C18 and the 1 pin of the AND gate U7 18, the output terminal of the AND gate U7 18 is connected with one end of the resistor R18, the other end of the resistor R18 is connected with the non-inverting terminal of the operational amplifier U8 18, and the other end of the capacitor R18 is connected with the output terminal of the capacitor R18 and the output terminal of the operational amplifier R18, the motor R18 are connected with the output terminal of the capacitor R18, The other end of the thermistor RTCR in the receiver and the other end of the resistor R14 in the current detection circuit are connected in parallel to each other and connected to ground, wherein the standard signal 3 is the temperature value at the previous time.
When the invention is used in concrete, the current detection circuit comprises a current sensor U1, a detector and a judger, wherein the detector detects a current signal of a motor stator by using a current sensor U1, the current signal output by the current sensor U1 is subjected to voltage division by using a resistor R2 and a resistor R3, the current signal is received by using an operational amplifier U2B, the current signal is subjected to follow-up processing by using a triode Q1, the current signal is transmitted to the operational amplifier U3B to be compared with a standard signal 1, when the operational amplifier U3B outputs high level to turn on a thyristor Q2 in the judger, the amplitude of the current signal is increased, namely the current of the motor stator is increased, at the moment, the thyristor Q2 transmits the current signal to a divider formed by the operational amplifier and a multiplier V1 through a resistor R8, the current signal is divided by the standard signal 2, when the output result of the divider turns on a triode Q3, indicating that the amplitude of the current signal of the motor stator is greater than the amplitude of the rated current signal of the stator, outputting the result output by the divider to the monitoring center, turning on the relay K1 by the triode Q3, closing the pin switch S1, starting the temperature detection circuit to detect the temperature signal of the stator on the motor, wherein the temperature detection circuit comprises a thermistor PTCR, a receiver and an output device, the receiver uses the thermistor PTCR, the resistor R13 and the adjustable resistor R16 to start detecting the temperature signal of the stator on the motor, the temperature signal is transmitted to the operational amplifier U5B through the diode D1 to be buffered, and then the temperature signal is transmitted to the output device, the output device uses the resistor R10 to transmit the temperature signal to the operational amplifier U6B to be subtracted from the standard signal 3, wherein the standard signal 3 is the temperature value at the previous moment, thereby calculating the temperature change value of the stator on the motor, the temperature change value is transmitted in two paths through a diode D2, one path is transmitted to a pin 16 of an AND gate U7A, the other path is transmitted to a pin 1 of the AND gate after time delay processing is carried out on the temperature change value through a resistor R18 and a capacitor C7, when the AND gate U7A outputs a high level, the temperature of a stator on the motor is indicated to be rising, the situation that a rotor of the motor is clamped by a foreign body is considered to occur at the moment, the high level output by the AND gate U7A is converted into a high level of a negative value through an operational amplifier U8B and a resistor R22 serving as an inverter, the high level of the negative value is sent to the motor, the motor is enabled to carry out reverse rotation, the clamped foreign body is thrown out, and the normal working state is recovered;
the current signal and the temperature signal of the stator of the motor are detected by setting the current detection circuit and the temperature detection circuit, the detector and the judging device are set for the current signal, accurate judgment is carried out on the amplitude of the current signal, the temperature detection circuit is opened according to the amplitude of the current signal, accurate control on the temperature signal of the stator of the motor is guaranteed, meanwhile, the receiver and the output device are used for analyzing the temperature signal, whether the rotor of the motor is in a state of clamping foreign matters or not is accurately analyzed, the output device is used for outputting reverse signals to enable the motor to be reversed, and then the rotor of the motor throws the foreign matters out, so that the situation that the motor of the electric sand suction pump is damaged due to the fact that an effective detection mode cannot be set in the working mode of the motor of the electric sand suction pump in the prior art is avoided, and the electric sand suction pump is prevented from being damaged.

Claims (2)

1. The controller is characterized by comprising a current detection circuit and a temperature detection circuit, wherein the current detection circuit detects that a current signal detected by a current sensor U1 passes through a detector and a judger and then turns on the temperature detection circuit, and the temperature detection circuit outputs a reverse signal to a motor after a temperature signal detected by a thermistor PTCR passes through a receiver and an outputter;
the current detection circuit comprises a current sensor U1, a detector and a judger, wherein the detector amplifies a current signal detected by the current sensor U1, the amplified current signal is transmitted to the judger, the judger judges the current signal and starts a temperature detection circuit according to the amplitude of the current signal, the temperature detection circuit comprises a thermistor PTCR, a receiver and an outputter, and the receiver receives a temperature signal detected by the temperature detection circuit through the thermistor PTCR and outputs a reverse signal to the motor through the outputter;
the detector comprises a resistor R2, one end of the resistor R2 is connected with an out pin of a current sensor U1, the other end of the resistor R2 is respectively connected with one end of a resistor R3 and the same-phase end of an operational amplifier U2B, the inverting end of the operational amplifier U2B is respectively connected with one end of a resistor R1 and one end of a resistor R4, the output end of the operational amplifier U2B is respectively connected with the other end of a resistor R1 and the base of a triode Q1, the collector of a triode Q1 is connected with one end of a resistor R5, the other end of the resistor R5 is connected with a VCC pin of a current sensor U1 and is connected with a positive power supply VCC, the emitter of a triode Q1 is respectively connected with one end of a resistor R6 and one end of a resistor R7, the other end of a resistor R7 is connected with the same-phase end of an operational amplifier U3B, the inverting end of the operational amplifier U3B is connected with one end of a resistor R B, the other end of the resistor R B is connected with a standard signal 1, and the other end of the resistor R B is connected with the standard signal 1, The other end of the resistor R3 and a gnd pin of the current sensor U1 are connected in parallel and grounded, wherein a standard signal 1 is a current signal acquired at the last moment;
the determiner comprises a thyristor Q2, the anode of a thyristor Q2 is connected with one end of a resistor R6 in the detector, the control pole of a thyristor Q2 is connected with the output end of an operational amplifier U3B in the detector, the cathode of a thyristor Q2 is connected with one end of a resistor R8, the other end of the resistor R8 is respectively connected with one end of a resistor R10 and the inverting end of an operational amplifier U4B, the inverting end of the operational amplifier U4B is connected with one end of a resistor R11, the output end of the operational amplifier U4B is respectively connected with a monitoring center, the base of a triode Q3 and a pin 1 of a multiplier V1, a pin 2 of the multiplier V1 is connected with one end of a resistor R12, the other end of the resistor R12 is connected with a standard signal 2, the output end of a multiplier V1 is connected with the other end of a resistor R10, the collector of the triode Q3 is connected with one end of a relay K1, the other end of a relay K1 is respectively connected with one end of a switch S1 and the other end of a positive polarity power supply VCC 5 in the detector, an emitter of the triode Q3 is connected with one end of a resistor R14, the other end of a resistor R14 is respectively connected with the other end of the resistor R11 and the other end of a resistor R6 in the detector and is connected with the ground in parallel, wherein a standard signal 2 is a rated current signal of a stator of the motor;
the receiver comprises a resistor R13, one end of a resistor R13 is connected with the other end of a switch S1 in the current detection circuit, the other end of the resistor R13 is connected with the upper end and the adjustable end of an adjustable resistor R16 respectively, the lower end of an adjustable resistor R16 is connected with one end of a thermistor PTCR and the anode of a diode D1 respectively, the cathode of the diode D1 is connected with the in-phase end of an operational amplifier U5B, the inverting end of the operational amplifier U5B is connected with one end of the resistor R19, and the other end of the resistor R19 is connected with the output end of the operational amplifier U5B.
2. The controller of claim 1, wherein the output device comprises an operational amplifier U6B, the non-inverting terminal of the operational amplifier U6B is connected to one terminal of a resistor R15 and one terminal of a resistor R20, the other terminal of the resistor R20 is connected to the output terminal of an operational amplifier U5B and the other terminal of a resistor R19 in the receiver, the inverting terminal of the operational amplifier U6B is connected to one terminal of a resistor R17, the other terminal of the resistor R17 is connected to the standard signal 3, the output terminal of the operational amplifier U6B is connected to the positive terminal of a diode D2, the negative terminal of the diode D2 is connected to one terminal of a resistor R18 and the 16 pin of an AND gate U7A, the other terminal of the resistor R18 is connected to one terminal of a capacitor C1 and the 1 pin of an AND gate U7A, the output terminal of the AND gate U7A is connected to one terminal of a resistor R21, the other terminal of the resistor R21 is connected to the non-inverting terminal of an operational amplifier U B, and the inverting terminal of the resistor R B are connected to the inverting terminal of the operational amplifier U8427, the other end of the resistor R22 is respectively connected with the output end of the operational amplifier U8B and the motor, the other end of the capacitor C1 is respectively connected with the other end of the resistor R15, the other end of the thermistor RTCR in the receiver and the other end of the resistor R14 in the current detection circuit and is connected with the ground in parallel, wherein the standard signal 3 is the temperature value at the last moment.
CN202110816544.5A 2021-07-20 2021-07-20 Electric sand suction pump controller Active CN113271053B (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109217748A (en) * 2018-11-16 2019-01-15 横店集团英洛华电气有限公司 Motor rotation blockage control circuit and its control method for cooking machine
CN110829355A (en) * 2019-11-29 2020-02-21 郑州工程技术学院 Mechanical equipment overload protection device
CN112531857A (en) * 2020-12-30 2021-03-19 国网河南省电力公司信息通信公司 Battery thermal detection control device of storage battery
CN112748180A (en) * 2021-01-30 2021-05-04 郑州铁路职业技术学院 Pantograph detection device for high-speed rail vehicle
CN112985511A (en) * 2021-03-25 2021-06-18 星凯电气有限公司 Isolation knife detection device of low-voltage switch cabinet
CN113014776A (en) * 2021-03-09 2021-06-22 杭州舜立光电科技有限公司 Intelligent camera

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109217748A (en) * 2018-11-16 2019-01-15 横店集团英洛华电气有限公司 Motor rotation blockage control circuit and its control method for cooking machine
CN110829355A (en) * 2019-11-29 2020-02-21 郑州工程技术学院 Mechanical equipment overload protection device
CN112531857A (en) * 2020-12-30 2021-03-19 国网河南省电力公司信息通信公司 Battery thermal detection control device of storage battery
CN112748180A (en) * 2021-01-30 2021-05-04 郑州铁路职业技术学院 Pantograph detection device for high-speed rail vehicle
CN113014776A (en) * 2021-03-09 2021-06-22 杭州舜立光电科技有限公司 Intelligent camera
CN112985511A (en) * 2021-03-25 2021-06-18 星凯电气有限公司 Isolation knife detection device of low-voltage switch cabinet

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