CN110601141A - Motor over-current detection device, motor system and platform - Google Patents
Motor over-current detection device, motor system and platform Download PDFInfo
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- CN110601141A CN110601141A CN201910931125.9A CN201910931125A CN110601141A CN 110601141 A CN110601141 A CN 110601141A CN 201910931125 A CN201910931125 A CN 201910931125A CN 110601141 A CN110601141 A CN 110601141A
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- 238000006243 chemical reaction Methods 0.000 description 14
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- 101100316752 Arabidopsis thaliana VAL1 gene Proteins 0.000 description 2
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
- G01R19/16528—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values using digital techniques or performing arithmetic operations
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/34—Testing dynamo-electric machines
- G01R31/343—Testing dynamo-electric machines in operation
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
- H02H7/085—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against excessive load
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
- H02K11/27—Devices for sensing current, or actuated thereby
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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
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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
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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
- H02P29/032—Preventing damage to the motor, e.g. setting individual current limits for different drive conditions
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Control Of Electric Motors In General (AREA)
Abstract
The application provides a motor overcurrent detection device, motor system and platform, the device includes: a first power supply for supplying power; the current detection module is used for measuring the quiescent current and the running current of the tested motor; the singlechip is used for determining an overcurrent protection value according to the quiescent current and the overcurrent preset value of the tested motor and determining whether the tested motor has an overcurrent phenomenon or not based on the running current and the overcurrent protection value of the tested motor; the first power supply is connected with the current detection module, the current detection module is grounded through the detected motor, and the current detection module is connected with the single chip microcomputer.
Description
Technical Field
The application relates to the field of overcurrent protection, in particular to a motor overcurrent detection device, a motor system and a platform.
Background
At present, an existing motor overcurrent detection device is an overcurrent protection value generally set according to experience, and when the overcurrent protection value is exceeded, an overcurrent phenomenon occurs in a motor. However, in the practical application process, the overcurrent protection value set according to experience has the problem that the overcurrent is judged by mistake when the motor operates normally.
Disclosure of Invention
An object of the embodiment of the application is to provide a motor overcurrent detection device, a motor system and a platform, which are used for solving the problem that the motor is misjudged during normal operation when an overcurrent protection value is set according to experience in the existing motor overcurrent detection device.
In a first aspect, an embodiment of the present application provides a motor overcurrent detection device, the device includes: a first power supply for supplying power; the current detection module is used for measuring the quiescent current and the running current of the tested motor; the singlechip is used for determining an overcurrent protection value according to the quiescent current of the tested motor, determining the overcurrent times of the tested motor based on the running current of the tested motor and the overcurrent protection value, and determining whether to control the motor to stop or not according to the overcurrent times; the first power supply is connected with the current detection module, the current detection module is grounded through the detected motor, and the current detection module is connected with the single chip microcomputer.
In the motor overcurrent detection device with the design, the quiescent current of the detected motor is detected through the current detection chip, and then the overcurrent protection value of the detected motor is set by combining the quiescent current of the detected motor and the overcurrent protection value set according to experience through the singlechip, so that the finally set overcurrent protection value of the detected motor takes the influence of other component parameters in the detection circuit into consideration, the problem that the motor is misjudged during normal operation due to the overcurrent protection value set according to experience in the existing motor overcurrent detection device is solved, the overcurrent detection of the detected motor is more accurate, and the running stability of the detected motor is ensured.
In an optional implementation manner of the first aspect, the current detection module includes a current detection chip, the model of the current detection chip is ACS712, and a first IP + pin and a second IP + pin of the current detection chip are connected in parallel and then connected to the first power supply; and a first IP-pin and a second IP-pin of the current detection chip are connected in parallel and then connected with the motor to be detected, and a VIOUT pin of the current detection chip is connected with the singlechip.
In an optional implementation manner of the first aspect, the apparatus further includes a first diode, the first diode is connected in parallel with the motor under test, a cathode of the first diode is connected with the current detection chip, and an anode of the first diode is grounded.
In the above embodiment, the motor to be tested is an inductance device, and when the inductance device is powered off, a large electromotive force is generated, so that the motor is not damaged by high voltage, and the first diode is added to bypass the high voltage when the motor is powered off.
In an optional implementation manner of the first aspect, the type of the single chip microcomputer is STC12C5a60S2, and the CURRENT _ AD pin of the single chip microcomputer is connected to the VIOUT pin of the CURRENT detection chip.
In the above embodiment, the CURRENT _ AD pin of the STC12C5a60S2 single chip microcomputer is an AD conversion pin, which is used to convert an analog signal output by the CURRENT detection chip into a corresponding digital value, and further realize setting of an overcurrent protection value based on the digital value.
In an optional implementation manner of the first aspect, the apparatus further includes a direction control circuit for controlling the running direction of the motor under test and an enable control circuit for controlling the enabling of the motor under test, and an MT _ DIR pin of the single chip microcomputer is connected with the motor under test through the direction control circuit; and an MT _ EN pin of the singlechip is connected with the anode of the first diode through the enabling control circuit.
In the above embodiment, the power state of the motor to be detected is controlled by the enable control circuit, and the rotation direction of the motor to be detected is controlled by the direction control circuit, so that the over-current detection device can also control and grasp the running state of the motor to be detected in real time.
In an optional implementation of the first aspect, the direction control circuit comprises: the double-pole double-throw relay comprises a coil, a first contact group and a second contact group, wherein the first contact group comprises a first movable contact, a first fixed contact and a second fixed contact, and the second contact group comprises a second movable contact, a third fixed contact and a fourth fixed contact; an MT _ DIR pin of the single chip microcomputer is connected with a first end of the first resistor, a second end of the first resistor is grounded through the second resistor, a second end of the first resistor is further connected with a base electrode of the NPN type triode, an emitting electrode of the NPN type triode is grounded, a collector electrode of the NPN type triode is respectively connected with an anode of the second diode and one end of the coil, a cathode of the second diode is connected with the other end of the coil and then connected with the second power supply, the first movable contact is connected with a cathode of the first diode, the second movable contact is connected with an anode of the first diode, the first fixed contact and the fourth fixed contact are connected with a cathode end of the tested motor, and the second fixed contact and the third fixed contact are connected with an anode end of the tested motor.
In the above designed embodiment, the direction control circuit is further controlled by the single chip microcomputer 30 to control the motor to rotate forward and backward, so that the designed motor overcurrent detection device can not only detect whether the motor is overcurrent, but also control and master the running state of the motor.
In an optional implementation of the first aspect, the enable control circuit comprises: the transient voltage suppressor comprises a third resistor, a photoelectric coupler, a third power supply, a fourth resistor, a fifth resistor, a transient voltage suppressor and a field effect transistor, wherein the photoelectric coupler is TLP281-1 in model; the MT _ EN pin of the single chip microcomputer is connected with the CATHODE pin of the photoelectric coupler through the third resistor, the ANODE pin of the photoelectric coupler is connected with the third power supply, the COLLECTOR pin of the photoelectric coupler is connected with the first power supply through the fourth resistor, the EMITTER pin of the photoelectric coupler is respectively connected with the first end of the fifth resistor, the negative electrode of the transient voltage suppressor and the grid electrode of the field effect tube, and the second end of the fifth resistor, the positive electrode of the transient voltage suppressor and the source electrode of the field effect tube are respectively grounded.
In the embodiment of the above design, the single chip microcomputer 30 controls the enable control circuit to control the motor to stop or rotate, so that the single chip microcomputer 30 controls the detected motor to stop when the overcurrent protection value is initially set, and after the current protection value is set, the single chip microcomputer 30 controls the detected motor to rotate, so that the subsequent overcurrent judgment is completed, and the overcurrent detection process of the motor is automated.
In an alternative embodiment of the first aspect, the transient voltage suppressor is of the model number HZD 5242B.
In an alternative embodiment of the first aspect, the fet is model 75NF 75.
In an alternative embodiment of the first aspect, the voltage of the first power supply is 48V.
In a second aspect, the present application provides an electric machine system comprising an electric machine body and the electric machine overcurrent protection device of any one of the optional embodiments of the first aspect, the electric machine body being electrically connected to the electric machine overcurrent protection device.
In a third aspect, an embodiment of the present application provides a platform, where the platform includes a platform body, a motor for driving the platform body to move, and a motor overcurrent protection device in any optional implementation manner of the first aspect, where the motor is electrically connected to the motor overcurrent protection device.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments of the present application will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.
Fig. 1 is a schematic view of a first structure of an over-current detection device according to a first embodiment of the present application;
fig. 2 is a schematic diagram of a second structure of an over-current detection apparatus according to a first embodiment of the present application;
fig. 3 is a schematic diagram of a third structure of an over-current detection apparatus according to the first embodiment of the present application;
fig. 4 is a fourth schematic structural diagram of an over-current detection apparatus according to a first embodiment of the present application;
fig. 5 is a fifth structural schematic diagram of the over-current detection device according to the first embodiment of the present application.
Icon: 10-a first power supply; 20-a current detection module; 201-current detection chip; 202-a first capacitance; 30-a single chip microcomputer; 40-a first diode; 50-direction control circuit; 501-a first resistor; 502-a second resistance; 503-NPN type triode; 504-a second diode; 505-double pole double throw relay; 5051-coil; a1 — first moving contact; a2 — first stationary contact; a3 — second stationary contact; b1 — second moving contact; b2 — third stationary contact; b3-fourth stationary contact; 506-a second power supply; 60-enable control circuitry; 601-third resistance; 602-a photo coupler; 603-a third power supply; 604-a fourth resistance; 605-a fifth resistance; 606-transient voltage suppressor; 607-field effect transistor; 70-motor interface.
Detailed Description
The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.
First embodiment
As shown in fig. 1, an embodiment of the present application provides a motor overcurrent detection apparatus, which includes: the device comprises a first power supply 10, a current detection module 20 and a single chip microcomputer 30, wherein the first power supply 10 is connected with the current detection module 20, the current detection module 20 is grounded through a detected motor, and the current detection module 20 is connected with the single chip microcomputer 30.
The first power supply 10 supplies power to the current detection module 20; the current detection module 20 is configured to measure a quiescent current and an operating current of the motor to be detected, and transmit the quiescent current and the operating current to the single chip microcomputer 30; the single chip microcomputer 30 receives the quiescent current and the operating current transmitted by the current detection module 20, determines an overcurrent protection value based on the quiescent current transmitted by the current detection module 20 and an overcurrent preset value set by a user, determines whether the detected motor has an overcurrent phenomenon based on the operating current of the detected motor and the overcurrent protection value, and controls the detected motor to stop rotating after determining that the number of times of the overcurrent phenomenon satisfies a certain preset number of times. The quiescent current is the current generated by the overcurrent detection circuit when the motor to be detected is not rotating, and the overcurrent protection value set by the single chip microcomputer 30 is determined comprehensively based on the quiescent current of the motor to be detected and an overcurrent preset value set by a user, which means that the influence of other component parameters in the detection circuit is considered in the process of determining the overcurrent protection value. In addition, the tested motor in the application can be a brushed push rod motor with rated operation parameters of 48V and 0.6A.
In the motor overcurrent detection device designed above, the quiescent current of the motor to be detected is detected through the current detection chip 201, and then the overcurrent protection value of the motor to be detected is set by combining the quiescent current of the motor to be detected and the overcurrent protection value set according to experience through the singlechip 30, so that the finally set overcurrent protection value of the motor to be detected takes the influence of other component parameters in the detection circuit into consideration, the problem that the motor is misjudged during normal operation due to the overcurrent protection value set according to experience in the existing motor overcurrent detection device is solved, and the overcurrent detection of the motor to be detected is more accurate and the running stability of the motor to be detected is ensured.
In an alternative embodiment of this embodiment, as shown in fig. 2, the CURRENT detection module 20 includes a CURRENT detection chip 201, the model of the CURRENT detection chip 201 is ACS712, the model of the single chip microcomputer 30 is STC12C5a60S2, the CURRENT detection chip 201 includes a first IP + pin, a second IP + pin, a first IP-pin, a second IP-pin, a VCC pin, a VIOUT pin, a FILTER pin, and a GND pin, the single chip microcomputer includes a CURRENT _ AD pin, and the CURRENT _ AD pin is connected to an analog-to-digital conversion module inside the single chip microcomputer 30.
The first IP + pin and the second IP + pin of the CURRENT detection chip 201 are connected in parallel and then connected to the first power supply 10, the first IP-pin and the second IP-pin of the CURRENT detection chip 201 are connected in parallel and then connected to the motor to be tested, the VCC pin of the CURRENT detection chip 201 is connected to a 5V power supply, the via pin of the CURRENT detection chip 201 is connected to the CURRENT _ AD pin of the single chip microcomputer 30, the FILTER pin of the CURRENT detection chip 201 is grounded through the first capacitor 202, and the GND pin of the CURRENT detection chip is grounded.
Before overcurrent detection is carried out, firstly, the circuit is used for carrying out quiescent CURRENT collection, a CURRENT _ AD pin of the singlechip 30 is connected with a VIOUT pin of the CURRENT detection chip 201, a first IP-pin and a second IP-pin of the CURRENT detection chip 201 are connected with a motor to be detected, and the motor to be detected does not rotate at the moment. Configuring a register related to an analog-digital conversion module by a program, and specifically configuring a pin into a high-impedance input mode, setting an analog-digital conversion channel number and analog-digital conversion cycle time, turning on an analog-digital conversion power supply, enabling analog-digital interruption, starting analog-digital conversion, generating an analog-digital interruption each time the analog-digital conversion is completed, and storing a converted result in an array by the program at the moment. When the quiescent current is collected, the analog-to-digital conversion module inside the single chip microcomputer 30 samples the output voltage of the current detection chip 201 for multiple times (for example, 20 times), wherein after the digital quantity corresponding to the output voltage of the current detection chip 201 sampled for multiple times is obtained, coarse error elimination can be performed on data sampled for multiple times through a 3sigma rule (laryida rule), then the data subjected to coarse error elimination is weighted and averaged to obtain the digital quantity corresponding to the average value of the output voltage of the current detection chip 201, the digital quantity corresponding to the average value of the output voltage reflects the magnitude of the quiescent current of the motor to be measured, and the single chip microcomputer 30 further determines the over-current protection value of the motor to be measured according to the digital quantity corresponding to the average value of the output voltage and the digital quantity corresponding to the over-current experience value set by the user.
Specifically, for example, the current detection chip 201 detects that the static current of the motor to be detected is I1, the output voltage is V1, and the analog-to-digital conversion module converts V1 into a corresponding digital value of VAL 1; the over-current experience value set by a user is I2, the corresponding voltage is V2, and the analog-digital conversion module converts V2 into a corresponding digital value VAL 2; assuming that the range of the current detection chip 201 is 5A, the accuracy is 185mv/a, the accuracy of the analog-to-digital conversion module inside the single chip 30 is 10 bits, and there are 1024 digital quantities, and the corresponding reference voltage is 5V, that is, the voltage corresponding to 1 digital quantity is 5/1024V. Then, the digital value VAL1 ═ I1 ═ 185/1000/5 ×. 1024 corresponding to the quiescent current I1, where I1 ×. 185/1000 represents the voltage corresponding to the current I1, and the unit is V, and I1 ×. 185/1000/5 ×. 1024 converts the voltage into a digital value; the set empirical value I2 corresponds to the numerical value VAL2 ═ I2 ×. 185/1000/5 ×. 1024. The final overcurrent protection value I is I1+ I2, and the digital value VAL corresponding to the overcurrent protection value I is VAL1+ VAL2 (I1+ I2) × 185/1000/5 × 1024.
After the overcurrent protection value is set based on the above process, the motor to be measured starts to operate normally, the current detection chip 201 detects the current of the operating motor to be measured in real time and transmits the current to the analog-to-digital conversion module in the single chip microcomputer 30, the single chip microcomputer 30 reads the data of the analog-to-digital conversion once every preset time (for example, 5ms), and determines whether the digital quantity corresponding to the read data is greater than or equal to the digital quantity corresponding to the set overcurrent protection value, and if the digital quantity corresponding to the read data is greater than or equal to the digital quantity corresponding to the set overcurrent protection value, it is determined that the overcurrent phenomenon occurs to the motor to be measured in the operating state.
In an optional implementation manner of this embodiment, after the single chip microcomputer 30 determines that the digital quantity corresponding to the data read once is greater than or equal to the digital quantity corresponding to the set overcurrent protection value (the detected motor has an overcurrent phenomenon), the single chip microcomputer 30 may increase the counter inside by 1, and if the digital quantity corresponding to the data read once is determined to be smaller than the digital quantity corresponding to the set overcurrent protection value, the single chip microcomputer 30 may decrease the counter inside by 1; then the single chip microcomputer 30 judges whether the data in the counter is larger than a preset number (for example, 5), if the single chip microcomputer 30 judges that the data in the counter is larger than or equal to 5, the detected motor is controlled to stop rotating, meanwhile, the counter is cleared, and if the data in the counter is judged to be smaller than 5 by the single chip microcomputer 30, no protection action occurs. In addition, after the digital quantity corresponding to the data read by the single chip microcomputer 30 is smaller than the digital quantity corresponding to the set overcurrent protection value, whether the data in the counter is larger than 0 or not can be continuously judged, if so, 1 is subtracted, and if not, 1 is not subtracted. After the operation of the counter is completed, the single chip microcomputer performs next data reading immediately at a preset time (for example, 5ms), and repeatedly performs the above operation.
In the embodiment designed above, whether to stop the motor to be tested is determined by whether the number of the overcurrent times of the motor to be tested exceeds the threshold value, so that the problem that the motor to be tested is stopped by mistake due to over-sensitive single judgment is solved.
In an optional implementation manner of this embodiment, when the motor to be tested is initially started, the single chip microcomputer 30 may delay a preset time (for example, 150ms) before performing the detection, which is because the current is very large when the motor to be tested is initially started, which may cause the single chip microcomputer 30 to erroneously determine that the overcurrent phenomenon occurs in the motor to be tested.
In an alternative embodiment of this embodiment, as shown in fig. 3, the apparatus further includes a first diode 40, the first diode 40 is connected in parallel with the motor to be tested, a cathode of the first diode 40 is connected to the current detection chip 201, and an anode of the first diode 40 is grounded.
In the above embodiment, the motor to be tested is an inductive device, and a large electromotive force is generated when the inductive device is powered off, so that the motor is not damaged by high voltage, and the first diode 40 is added to bypass the high voltage when the motor is powered off.
In an optional implementation manner of this embodiment, the apparatus further includes a direction control circuit 50 and an enable control circuit 60, the MT _ DIR pin of the single chip microcomputer 30 is connected to the motor to be tested through the direction control circuit 50, and the MT _ EN pin of the single chip microcomputer 30 is connected to the positive electrode of the first diode 40 through the enable control circuit 60. The direction control circuit 50 controls the running direction of the motor to be tested, such as the forward rotation or the reverse rotation of the motor to be tested; the enabling control circuit 60 controls whether the motor to be tested runs or stops, for example, in the stage of detecting the quiescent current of the motor to be tested, the single chip microcomputer 30 can control the motor to be tested to stop rotating through the MT _ EN pin; after the overcurrent protection value is set, the single chip microcomputer 30 can control the motor to be tested to start rotating through the MT _ EN pin.
In an alternative embodiment of this embodiment, as shown in fig. 4, the direction control circuit 50 includes a first resistor 501, a second resistor 502, an NPN-type transistor 503, a second diode 504, a double pole double throw relay 505, a second power source 506, the double pole double throw relay 505 including a coil 5051, a first contact set including a first movable contact a1, a first stationary contact a2, and a second stationary contact A3, and a second contact set including a second movable contact B1, a third stationary contact B2, and a fourth stationary contact B3.
An MT _ DIR pin of the single chip microcomputer 30 is connected with a first end of a first resistor 501, a second end of the first resistor 501 is grounded through a second resistor 502, a second end of the first resistor 501 is further connected with a base electrode of an NPN type triode 503, an emitter electrode of the NPN type triode 503 is grounded, a collector electrode of the NPN type triode 503 is respectively connected with an anode of a second diode 504 and one end of a coil 5051, a cathode of the second diode 504 is connected with the other end of the coil 5051 and then connected with a second power source 506, a first movable contact A1 is connected with a cathode of a first diode 40, a second movable contact B1 is connected with an anode of the first diode 40, a first fixed contact A2 and a fourth fixed contact B3 are connected with a cathode end of a motor to be tested, and a second fixed contact A3 and a third fixed contact B2 are connected with an anode end of the motor to be tested.
As shown in fig. 4, in the initial state, the MT _ DIR pin output of the single chip microcomputer 30 is low, the NPN transistor 503 is turned off, the coil 5051 is not energized, and the contacts are maintained in the initial state, that is, as shown in the figure, the first movable contact a1 is connected to the second stationary contact A3, the second movable contact B1 is connected to the fourth stationary contact B3, and at this time, since the first stationary contact a2 and the fourth stationary contact B3 are connected to the negative terminal M + of the motor under test, and the second stationary contact A3 and the third stationary contact B2 are connected to the positive terminal M + of the motor under test, the motor assumes the forward rotation state. When the motor needs to be reversely rotated, the MT _ DIR pin output of the single chip microcomputer 30 is changed into high level, at this time, the base of the NPN type triode 503 inputs high level, the NPN type triode 503 is in saturation conduction, the coil 5051 is electrified, the coil 5051 attracts a contact to form a first movable contact a1 to be connected with a first fixed contact a2, a second movable contact B1 is connected with a third fixed contact B2, at this time, because the first fixed contact a2 and the fourth fixed contact B3 are connected with the negative electrode end M-of the motor to be tested, the second fixed contact A3 and the third fixed contact B2 are connected with the positive electrode end M + of the motor to be tested, and the motor is in a reverse rotation state.
The first resistor 501 mainly plays a role of current limiting; the second resistor 502 reliably turns off the NPN transistor 503; the second diode 504 mainly functions as a reverse freewheeling, and provides a leakage path for the current in the coil 5051 when the NPN-type triode is turned from on to off, so as to prevent the coil 5051 from being scalded, and simultaneously prevent the high-voltage potential generated instantaneously from damaging the electric appliance.
In the above designed embodiment, the direction control circuit is further controlled by the single chip microcomputer 30 to control the motor to rotate forward and backward, so that the designed motor overcurrent detection device can not only detect whether the motor is overcurrent, but also control and master the running state of the motor.
In an alternative embodiment of this embodiment, as shown in fig. 4, the enable control circuit 60 includes a third resistor 601, a photocoupler 602, a third power supply 603, a fourth resistor 604, a fifth resistor 605, a transient voltage suppressor 606, and a fet 607.
The model of the photocoupler 602 is TLP 281-1; the MT _ EN pin of the single chip microcomputer 30 is connected to the catode pin of the photocoupler 602 through the third resistor 601, the ANODE pin of the photocoupler 602 is connected to the third power supply 603, the collecter pin of the photocoupler 602 is connected to the first power supply 10 through the fourth resistor 604, the EMITTER pin of the photocoupler 602 is connected to the first end of the fifth resistor 605, the negative electrode of the transient voltage suppressor 606, and the gate of the fet 607, and the second end of the fifth resistor 605, the positive electrode of the transient voltage suppressor 606, and the source of the fet 607 are grounded, respectively. Wherein, the Transient Voltage Suppressor is a (TVS) tube.
When the motor to be tested does not run/rotate, for example, in the process of collecting the quiescent current of the motor to be tested, the output level of the MT _ EN pin of the single chip microcomputer 30 is high level, at this time, the field effect transistor 607 is turned off, at this time, the negative electrode end M-of the motor to be tested is disconnected from the ground end, no current exists in the circuit of the motor to be tested, and the motor to be tested does not rotate. When the motor needs to rotate, for example, after the overcurrent protection value is set, the output level of the MT _ EN pin of the single chip microcomputer 30 is a low level, the field effect transistor 607 is turned on, the negative end M-of the motor to be tested is connected to the ground, a current flows in the circuit of the motor to be tested, and the motor to be tested rotates. Because the rated operating voltage of the motor is too high, namely the voltage value of the first power supply is too high, the enabling control circuit adopts the photoelectric coupler 602 to isolate a high-voltage signal, so that the high-voltage power supply is isolated from a low-voltage device, and the low-voltage device is prevented from being damaged by high-voltage impact.
In the embodiment of the above design, the single chip microcomputer 30 controls the enable control circuit to control the motor to stop or rotate, so that the single chip microcomputer 30 controls the detected motor to stop in the initial overcurrent protection value setting stage, and after the overcurrent protection value is set, the single chip microcomputer 30 controls the detected motor to rotate, so that the subsequent overcurrent judgment is completed, and the overcurrent detection process of the motor is automated.
IN an alternative embodiment of this embodiment, the fet 607 may be 75NF75, the tvs 606 may be HZD5242B, the first diode 40 and the second diode 504 may be IN4007, and the NPN transistor may be SS 8050.
In an alternative embodiment of this embodiment, the first power source 10 may be 48V, the second power source 506 may be 12V, and the third power source 603 may be 5V. The first power supply 10 is 48V, and the motor to be tested can operate under a rated voltage, so that the overcurrent detection result of the motor to be tested is more accurate.
In an optional implementation manner of this embodiment, as shown in fig. 5, the apparatus further includes a motor interface 70, and the motor to be tested is directly connected to the motor overcurrent detection apparatus through the motor interface 70.
Second embodiment
The present application further provides a motor system, which includes a motor body and a motor overcurrent detection device in any optional implementation manner of the first embodiment, where the motor overcurrent detection device is electrically connected to the motor body, where the motor body represents an existing motor capable of rotating in an energized state, for example, a brushed plunger motor with rated operating parameters of 48V and 0.6A, and the motor overcurrent detection device may be disposed inside the motor body or outside the motor body.
Third embodiment
The application also provides a platform, which comprises a platform body, a motor and a motor overcurrent detection device, wherein the motor is used for driving the platform body to move, the motor overcurrent detection device is arranged in any optional embodiment of the first embodiment, and the motor overcurrent detection device are electrically connected.
In an alternative embodiment of this embodiment, the platform may be a lifting platform, and the platform body represents a mechanical structure that the lifting platform ascends and descends under the driving of a motor. Optionally, the motor drives the platform body to ascend when rotating forwards, and drives the platform body to descend when rotating backwards.
In the platform lifting process, due to the action of the motor overcurrent detection device, the lifting platform cannot generate the condition that the motor overcurrent misjudgment is carried out in the operation process so as to cause the lifting platform to stop, the stability of the platform operation is enhanced, and the experience of a user is improved. The motor overcurrent detection device has the same function as the motor overcurrent detection device in the first embodiment, namely, the quiescent current of the motor to be detected is detected through the current detection chip, and then the overcurrent protection value of the motor to be detected is set by combining the quiescent current of the motor to be detected and the overcurrent protection value set according to experience through the singlechip, so that the influence of other component parameters in the detection circuit is considered in the finally set overcurrent protection value of the motor to be detected, the problem that the motor is misjudged during normal operation due to the overcurrent protection value set according to experience in the existing motor overcurrent detection device is solved, the overcurrent detection of the motor to be detected is more accurate, the stability of the operation of the motor to be detected is ensured, and the stability of the operation of a platform is ensured.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus may be implemented in other ways. The above-described apparatus embodiments are merely illustrative, and for example, the division of the units/modules is only one logical division, and there may be other divisions in actual implementation, and for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection of devices or units through some communication interfaces, and may be in an electrical, mechanical or other form.
In addition, units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
Furthermore, the functional modules in the embodiments of the present application may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.
In this document, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.
The above description is only an example of the present application and is not intended to limit the scope of the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. An over-current detection device for a motor, the device comprising:
a first power supply for supplying power;
the current detection module is used for measuring the quiescent current and the running current of the tested motor;
the singlechip is used for determining an overcurrent protection value according to the quiescent current and the overcurrent preset value of the tested motor and determining whether the tested motor has an overcurrent phenomenon or not based on the running current and the overcurrent protection value of the tested motor;
the first power supply is connected with the current detection module, the current detection module is grounded through the detected motor, and the current detection module is connected with the single chip microcomputer.
2. The apparatus of claim 1, wherein the current detection module comprises a current detection chip, the model of the current detection chip is ACS712, and a first IP + pin and a second IP + pin of the current detection chip are connected in parallel and then connected to the first power supply; and a first IP-pin and a second IP-pin of the current detection chip are connected in parallel and then connected with the motor to be detected, and a VIOUT pin of the current detection chip is connected with the singlechip.
3. The apparatus of claim 2, further comprising a first diode connected in parallel with the motor under test, wherein a cathode of the first diode is connected to the current detection chip, and an anode of the first diode is grounded.
4. The device of claim 3, wherein the type of the single chip microcomputer is STC12C5A60S2, and the CURRENT _ AD pin of the single chip microcomputer is connected with the VIOUT pin of the CURRENT detection chip.
5. The device of claim 4, further comprising a direction control circuit for controlling the running direction of the motor to be tested and an enabling control circuit for controlling the enabling of the motor to be tested, wherein the MT _ DIR pin of the single chip microcomputer is connected with the motor to be tested through the direction control circuit; and an MT _ EN pin of the singlechip is connected with the anode of the first diode through the enabling control circuit.
6. The apparatus of claim 5, wherein the direction control circuit comprises: the double-pole double-throw relay comprises a coil, a first contact group and a second contact group, wherein the first contact group comprises a first movable contact, a first fixed contact and a second fixed contact, and the second contact group comprises a second movable contact, a third fixed contact and a fourth fixed contact;
an MT _ DIR pin of the single chip microcomputer is connected with a first end of the first resistor, a second end of the first resistor is grounded through the second resistor, a second end of the first resistor is further connected with a base electrode of the NPN type triode, an emitting electrode of the NPN type triode is grounded, a collector electrode of the NPN type triode is respectively connected with an anode of the second diode and one end of the coil, a cathode of the second diode is connected with the other end of the coil and then connected with the second power supply, the first movable contact is connected with a cathode of the first diode, the second movable contact is connected with an anode of the first diode, the first fixed contact and the fourth fixed contact are connected with a cathode end of the tested motor, and the second fixed contact and the third fixed contact are connected with an anode end of the tested motor.
7. The apparatus of claim 5, wherein the enable control circuit comprises: the transient voltage suppressor comprises a third resistor, a photoelectric coupler, a third power supply, a fourth resistor, a fifth resistor, a transient voltage suppressor and a field effect transistor, wherein the photoelectric coupler is TLP281-1 in model;
the MT _ EN pin of the single chip microcomputer is connected with the CATHODE pin of the photoelectric coupler through the third resistor, the ANODE pin of the photoelectric coupler is connected with the third power supply, the COLLECTOR pin of the photoelectric coupler is connected with the first power supply through the fourth resistor, the EMITTER pin of the photoelectric coupler is respectively connected with the first end of the fifth resistor, the negative electrode of the transient voltage suppressor and the grid electrode of the field effect tube, and the second end of the fifth resistor, the positive electrode of the transient voltage suppressor and the source electrode of the field effect tube are respectively grounded.
8. The apparatus of claim 7, wherein the transient voltage suppressor is HZD 5242B.
9. An electric motor system, characterized in that the electric motor system comprises an electric motor body and the electric motor overcurrent detection apparatus according to any one of claims 1 to 8, the electric motor body and the electric motor overcurrent detection apparatus being electrically connected.
10. A platform, comprising a platform body, a motor for driving the platform body to move, and the motor overcurrent detection apparatus according to any one of claims 1 to 8, wherein the motor is electrically connected to the motor overcurrent detection apparatus.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113009229A (en) * | 2021-03-16 | 2021-06-22 | 东风汽车集团股份有限公司 | Detection circuit and detection method for automobile insulation resistance value |
| WO2021128711A1 (en) * | 2019-12-26 | 2021-07-01 | 上海派能能源科技股份有限公司 | Battery turn on circuit and lithium battery |
| CN115153365A (en) * | 2021-04-02 | 2022-10-11 | 速感科技（北京）有限公司 | Cleaning robot, method for controlling rotation speed of main brush of cleaning robot, and storage medium |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107255763A (en) * | 2017-07-28 | 2017-10-17 | 南京工业职业技术学院 | A kind of antenna lodging device automatic testing equipment |
| CN107313563A (en) * | 2017-08-22 | 2017-11-03 | 南京信息职业技术学院 | Telescopic stair |
| CN109659921A (en) * | 2018-12-27 | 2019-04-19 | 惠科股份有限公司 | Overcurrent protection system and method and display device |
| CN209240913U (en) * | 2018-12-07 | 2019-08-13 | 上海华宿电气股份有限公司 | Storage battery charging station and storage battery charging system |
| CN210444006U (en) * | 2019-09-27 | 2020-05-01 | 深圳市施罗德工业集团有限公司 | Motor over-current detection device, motor system and platform |
-
2019
- 2019-09-27 CN CN201910931125.9A patent/CN110601141A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107255763A (en) * | 2017-07-28 | 2017-10-17 | 南京工业职业技术学院 | A kind of antenna lodging device automatic testing equipment |
| CN107313563A (en) * | 2017-08-22 | 2017-11-03 | 南京信息职业技术学院 | Telescopic stair |
| CN209240913U (en) * | 2018-12-07 | 2019-08-13 | 上海华宿电气股份有限公司 | Storage battery charging station and storage battery charging system |
| CN109659921A (en) * | 2018-12-27 | 2019-04-19 | 惠科股份有限公司 | Overcurrent protection system and method and display device |
| CN210444006U (en) * | 2019-09-27 | 2020-05-01 | 深圳市施罗德工业集团有限公司 | Motor over-current detection device, motor system and platform |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021128711A1 (en) * | 2019-12-26 | 2021-07-01 | 上海派能能源科技股份有限公司 | Battery turn on circuit and lithium battery |
| CN113009229A (en) * | 2021-03-16 | 2021-06-22 | 东风汽车集团股份有限公司 | Detection circuit and detection method for automobile insulation resistance value |
| CN115153365A (en) * | 2021-04-02 | 2022-10-11 | 速感科技（北京）有限公司 | Cleaning robot, method for controlling rotation speed of main brush of cleaning robot, and storage medium |
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