CN114678836A - Motor locked-rotor detection system and detection method - Google Patents
Motor locked-rotor detection system and detection method Download PDFInfo
- Publication number
- CN114678836A CN114678836A CN202011556394.0A CN202011556394A CN114678836A CN 114678836 A CN114678836 A CN 114678836A CN 202011556394 A CN202011556394 A CN 202011556394A CN 114678836 A CN114678836 A CN 114678836A
- Authority
- CN
- China
- Prior art keywords
- motor
- electric quantity
- module
- outputting
- main control
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
-
- 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
-
- 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
- H02P3/00—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters
- H02P3/06—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter
Abstract
The invention discloses a motor locked-rotor detection system and a detection method, wherein the motor locked-rotor detection system comprises: the system comprises a main control module, an electric quantity detection module and a motor driving module; the main control module is used for outputting a first enabling signal to the electric quantity detection module, outputting a rotation control signal to the motor driving module and outputting a second enabling signal to the electric quantity detection module after a first preset time length; the motor driving module is used for driving the motor to rotate according to the rotation control signal; the electric quantity detection module is used for acquiring a first electric quantity value of the battery within a first preset time according to the first enabling signal, acquiring a second electric quantity value of the battery within a second preset time according to the second enabling signal, and outputting the first electric quantity value and the second electric quantity value to the main control module; the main control module is also used for stopping outputting the rotation control signal when the motor is judged to be locked according to the first electric quantity value and the second electric quantity value. Therefore, the motor locked rotor can be effectively detected, and the detection accuracy and reliability are improved.
Description
Technical Field
The invention relates to the technical field of intelligent door locks, in particular to a motor locked-rotor detection system and a motor locked-rotor detection method.
Background
In practical applications of a motor, if a motor control system cannot stop driving the motor in time when the motor is locked by an object, the motor control system will burn the motor because the locked-rotor current is far greater than the rated current of the motor within a period of time after the period of time, so that the existing motor control system usually realizes locked-rotor detection by a method of presetting a locked-rotor current threshold value in order to ensure safe use of the motor, that is, the current value of the motor detected in the running process of the motor is greater than the preset locked-rotor current threshold value, and the motor is determined to be locked-rotor. However, in practical application, due to the influence of the load and the parameters of the motor, the actual current value of the motor subjected to locked rotor is smaller than the preset blocked current value, so that the locked rotor detection result is inaccurate.
Thus, the prior art has yet to be improved and enhanced.
Disclosure of Invention
In view of the above disadvantages of the prior art, the present invention provides a motor locked-rotor detection system and a detection method thereof, which can effectively improve the accuracy and reliability of locked-rotor detection.
In order to achieve the purpose, the invention adopts the following technical scheme:
A motor stall detection system comprising:
the system comprises a main control module, an electric quantity detection module and a motor driving module, wherein the main control module is respectively connected with the electric quantity detection module and the motor driving module;
the main control module is used for outputting a first enabling signal to the electric quantity detection module, outputting a rotation control signal to the motor driving module and outputting a second enabling signal to the electric quantity detection module after a first preset time length;
the motor driving module is used for driving the motor to rotate according to the rotation control signal;
the electric quantity detection module is used for acquiring a first electric quantity value of the battery within a first preset time according to the first enabling signal, acquiring a second electric quantity value of the battery within a second preset time according to the second enabling signal, and outputting the first electric quantity value and the second electric quantity value to the main control module;
the main control module is further used for stopping outputting the rotation control signal when the motor is judged to be locked according to the first electric quantity value and the second electric quantity value.
The motor locked rotor detection system further comprises: the alarm module is connected with the main control module;
the main control module is also used for outputting an alarm control signal to the alarm module when judging that the motor is locked;
the alarm module is used for outputting an alarm voice signal according to the alarm control signal.
The motor locked rotor detection system further comprises: the fingerprint module is connected with the main control module and used for acquiring fingerprint information and outputting a starting instruction to the main control module when the fingerprint information is determined to be qualified.
In the motor locked-rotor detection system, the main control module comprises a control chip, and the control chip is respectively connected with the motor driving module, the electric quantity detection module, the fingerprint module and the alarm module;
the control chip is used for calculating a slope value of an electric quantity change curve according to the first electric quantity value and the second electric quantity value, determining that the motor is locked when the slope value of the electric quantity change curve is judged to be larger than a preset value, stopping outputting the rotation control signal and outputting the alarm control signal to the alarm module.
The motor locked rotor detection system, the electric quantity detection module includes:
the driving unit is respectively connected with the switch unit and the control chip, the switch unit is connected with the voltage dividing unit, and the voltage dividing unit is respectively connected with the battery and the control chip.
The motor locked rotor detection system, the drive unit includes: first resistance, second resistance, triode and first electric capacity, the one end of first resistance is connected control chip's ADC _ EN signal end, the other end of first resistance is connected the one end of second resistance with the base of triode, the projecting pole of triode the other end of second resistance with the one end of first electric capacity is all ground connection, the other end of first electric capacity with the collecting electrode of triode is connected the switch unit.
The motor locked rotor detection system, the switch unit includes: the other end of the first capacitor and the collector of the triode are connected to one end of the third resistor, the other end of the third resistor is connected with the voltage dividing unit and the first end of the switch tube, the second end of the switch tube is connected with the battery, and the third end of the switch tube is connected with the voltage dividing unit.
The motor locked rotor detection system, the partial pressure unit includes: the battery is connected with the other end of the fourth resistor and the other end of the second capacitor, the other end of the fifth resistor is connected with the other end of the third resistor and the first end of the switch tube, one end of the fifth resistor is connected with the third end of the switch tube, the other end of the fifth resistor, one end of the sixth resistor and one end of the third capacitor are connected with the ADC _ VF signal end of the control chip, and the other end of the sixth resistor and the other end of the third capacitor are grounded.
The motor locked rotor detection system, the motor drive module includes:
the driving circuit comprises a driving chip, a fourth capacitor and a fifth capacitor, wherein the 4 th pin of the driving chip, one end of the fourth capacitor and one end of the fifth capacitor are connected with the battery, the other end of the fourth capacitor and the other end of the fifth capacitor are grounded, the 5 th pin of the driving chip and the 6 th pin of the driving chip are connected with the 2 nd pin of the motor, and the 7 th pin of the driving chip and the 8 th pin of the driving chip are connected with the 1 st pin of the motor.
A motor locked-rotor detection method is applied to a motor locked-rotor detection system, the motor locked-rotor detection system comprises a main control module, an electric quantity detection module and a motor driving module, and the detection method comprises the following steps:
outputting a first enabling signal to an electric quantity detection module based on the main control module, outputting a rotation control signal to the motor driving module and outputting a second enabling signal to the electric quantity detection module after a first preset time length;
driving the motor to rotate according to the rotation control signal based on the motor driving module;
acquiring a first electric quantity value of the battery within a first preset time period according to the first enabling signal based on the electric quantity detection module, acquiring a second electric quantity value of the battery within a second preset time period according to the second enabling signal, and outputting the first electric quantity value and the second electric quantity value to the main control module;
and stopping outputting the rotation control signal when the main control module judges that the motor is locked according to the first electric quantity value and the first electric quantity value.
Compared with the prior art, the motor locked-rotor detection system and the motor locked-rotor detection method provided by the invention have the advantages that the motor locked-rotor detection system comprises the main control module, the electric quantity detection module and the motor driving module, wherein the main control module is used for outputting a first enabling signal to the electric quantity detection module, outputting a rotation control signal to the motor driving module and outputting a second enabling signal to the electric quantity detection module after a first preset time length; the motor driving module is used for driving the motor to rotate according to the rotation control signal; the electric quantity detection module is used for acquiring a first electric quantity value of the battery within a first preset time according to the first enabling signal, acquiring a second electric quantity value of the battery within a second preset time according to the second enabling signal, and outputting the first electric quantity value and the second electric quantity value to the main control module; the main control module is also used for stopping outputting the rotation control signal when the motor is judged to be locked according to the first electric quantity value and the second electric quantity value. Therefore, the motor locked rotor can be effectively detected, and the detection accuracy and reliability are improved.
Drawings
Fig. 1 is a block diagram of a motor locked-rotor detection system provided by the present invention;
fig. 2 is a schematic diagram of a control chip in the motor locked rotor detection system provided by the invention;
fig. 3 is a schematic diagram of a motor driving module and an electric quantity detecting module in the motor locked rotor detecting system provided by the invention;
fig. 4 is a flowchart of a control method of the motor stalling detection system provided by the invention;
fig. 5 is a flowchart illustrating the operation of the motor stalling detection system according to the present invention;
reference numerals:
11: a motor stalling detection system; 12: a battery; 13: a motor; 100: a main control module; 200: an electric quantity detection module; 300: a motor drive module; 210: a drive unit; 220: a switch unit; 230: a voltage dividing unit.
Detailed Description
In view of the defects of the prior art, the invention aims to provide a motor locked-rotor detection system and a detection method, which can effectively improve the accuracy and reliability of locked-rotor detection.
In order to make the objects, technical solutions and effects of the present invention clearer and clearer, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, the motor locked-rotor detecting system 11 provided by the present invention includes: the electric vehicle comprises a main control module 100, an electric quantity detection module 200 and a motor driving module 300, wherein the main control module 100 is respectively connected with the electric quantity detection module 200 and the motor driving module 300, the electric quantity detection module 200 is connected with a battery 12, and the motor driving module 300 is connected with a motor 13.
Since the discharge curves of the batteries 12 are different, and the discharge curves are different under different discharge conditions, the electric quantity is also different. The change of the electric quantity of the battery 12 under a high load (large current) is large, and the slope of the discharge curve is steep. And if the discharge is carried out under low load, the measured electric quantity has small change, and the slope of the discharge curve is smooth. Figuratively, a large current will quickly reduce the voltage of the battery 12, while a small current will deplete the remaining power in the battery 12 a little bit.
In the electronic product for driving the motor 13 by the power supplied by the battery 12, the current will instantaneously increase and exceed the normal value when the motor 13 is locked and maintain for a period of time, and will also be reflected in the change before and after the electric quantity. According to the invention, the impact of the current of the motor 13 during locked rotor on the electric quantity of the battery 12 is utilized, the electric quantity data before and during the operation of the motor 13 is sampled by the main control module 100 in the electronic product, whether the motor 13 is locked rotor is rapidly judged according to the electric quantity values sampled twice, and then the output of the rotation control signal of the motor 13 is cut off, so that the motor 13 is prevented from being burnt out during locked rotor.
In specific implementation, the main control module 100 is configured to output a first enable signal (in this embodiment, ADC _ EN) to the electric quantity detection module 200, output rotation control signals (in this embodiment, PWMA _ MOTOR and PWMB _ MOTOR) to the MOTOR driving module 300 after a first preset time period, and output a second enable signal to the electric quantity detection module 200; when the motor 13 does not rotate, the main control module 100 outputs a high-level enable signal, that is, a first enable signal, to the electric quantity detection module 200 for the first time, where the electric quantity detection module 200 is configured to obtain a first electric quantity value of the battery 12 within a first preset time period according to the first enable signal, and output the first electric quantity value to the main control module 100; then, the main control module 100 outputs a rotation control signal to the motor driving module 300, and the motor driving module 300 is configured to drive the motor 13 to rotate according to the rotation control signal, so that the main control module 100 outputs a high-level enable signal, that is, a second enable signal to the electric quantity detection module 200 again at this time, so that the electric quantity detection module 200 obtains a second electric quantity value of the battery 12 within a second preset time period according to the second enable signal and outputs the second electric quantity value to the main control module 100; the main control module 100 is further configured to stop outputting the rotation control signal when determining that the motor 13 is locked according to the first electric quantity value and the second electric quantity value. And the first preset duration and the second preset duration are equal in value. The main control module 100 obtains the electric quantity value of the battery 12 before the motor 13 works, that is, the electric quantity value of the battery 12 after the motor 13 rotates, and then judges whether the motor 13 is locked, according to the electric quantity values obtained twice, when the motor 13 is judged to be locked, the output of the rotation driving signal is immediately stopped, the motor 13 is controlled to stop rotating, and the accuracy and the reliability of the locked rotation detection of the motor 13 are improved.
Further, the motor locked rotor detection system 11 further includes an alarm module 400, and the alarm module 400 is connected to the main control module 100; the main control module 100 is further configured to output an alarm control signal to the alarm module 400 when determining that the motor 13 is locked, and the alarm module 400 is configured to output an alarm voice signal according to the alarm control signal, so as to prompt a user to eliminate a locked-rotor problem in time.
Further, the motor stalling detection system 11 further includes a fingerprint module 500, the fingerprint module 500 is connected to the main control module 100, the fingerprint module 500 is configured to obtain fingerprint information, and output a start instruction to the main control module 100 when determining that the fingerprint information is qualified, and certainly, other door opening verification methods may also be adopted in other embodiments, and then the main control module 100 outputs a first enable signal to the electric quantity detection module 200 according to the start instruction, so as to determine whether the motor 13 stalls.
Further, referring to fig. 2, the main control module 100 includes a control chip U1, and the control chip U1 is connected to the motor driving module 300, the power detection module 200, the fingerprint module 500, and the alarm module 400, respectively.
The control chip U1 is configured to output a first enable signal to the electric quantity detection module 200 according to the start instruction, output a rotation control signal to the motor driving module 300 after a first preset duration, output a second enable signal to the electric quantity detection module 200, calculate a slope value of an electric quantity change curve according to the first electric quantity value and the second electric quantity value, determine that the motor 13 is locked when the slope value of the electric quantity change curve is greater than a preset value, stop outputting the rotation control signal, and output an alarm control signal to the alarm module 400; in this embodiment, the model of the control chip U1 is nxpl pc55S69, although in other embodiments, a control chip U1 with the same function may be selected, which is not limited in the present invention.
After the user passes the fingerprint authentication successfully, the control chip U1 outputs a first enable signal to the electric quantity detection module 200, and controls the electric quantity detection module 200 to collect 200 first electric quantity values sampled within a first preset time (for example, 50 ms). Subsequently, the control chip U1 sends a motor 13 rotation control signal to the motor driving module 300, and the motor driving module 300 drives the motor 13 to rotate according to the rotation control signal; meanwhile, the control chip U1 sends a second enable signal to the electric quantity detection module 200, so that the electric quantity detection module 200 samples 200 second electric quantity values within a second preset time (for example, 50 ms); then the control chip U1 performs least square method fitting to the slope value of the electric quantity change curve according to the first electric quantity value and the second electric quantity value, if the slope value of the electric quantity change curve exceeds the range of the slope value of the electric quantity change of the battery 12 in normal operation of the motor 13, it indicates that the motor 13 is locked, then the control chip U1 cuts off the output of the rotation control signal of the motor 13, and at the same time, outputs an alarm control signal to the alarm module 400, and the alarm module 400 performs voice alarm to prompt the user to eliminate the locked-rotor problem. In the invention, a plurality of electric quantity values before and after the motor 13 works are analyzed by a least square method, and compared with the existing comparison judgment method for setting a locked-rotor current threshold value, the obtained judgment result is more accurate and reliable.
Further, referring to fig. 3, the power detection module 200 includes a driving unit 210, a switch unit 220 and a voltage divider unit 230, the driving unit 210 is connected to the switch unit 220 and the control chip U1, the switch unit 220 is connected to the voltage divider unit 230, and the voltage divider unit 230 is connected to the battery 12 and the control chip U1.
The driving unit 210 is configured to drive the switch unit 220 to be turned on or off according to a first enable signal or a second enable signal, and the voltage dividing unit 230 is configured to divide a supply voltage (BAT _ VCC in this embodiment) of the battery 12 and output a first electric quantity value or a second electric quantity value to the main control module 100 when the switch unit 220 is turned on; when the driving unit 210 drives the switching unit 220 to be turned on according to the high-level enable signal output by the control chip U1, the battery 12 is connected to the voltage dividing unit 230, otherwise, the battery 12 is not connected to the voltage dividing unit 230; when the switch unit 220 is turned on, the power supply voltage of the battery 12 is divided and sampled to obtain a first electric quantity value or a second electric quantity value, and the first electric quantity value and the second electric quantity value are output to the control chip U1, so that the control chip U1 can determine the operating state of the motor 13.
Further, the driving unit 210 includes: the control circuit comprises a first resistor R1, a second resistor R2, a triode Q1 and a first capacitor C1, wherein one end of the first resistor R1 is connected with an ADC _ EN signal end of a control chip U1, the other end of the first resistor R1 is connected with one end of the second resistor R2 and a base electrode of the triode Q1, an emitter of the triode Q1, the other end of the second resistor R2 and one end of the first capacitor C1 are all grounded, the other end of the first capacitor C1 and a collector of the triode Q1 are connected with a switch unit 220, and the triode Q1 in the embodiment is an N-type triode Q1; when the enable signal ADC _ EN is set to a high level by the control chip U1, the transistor Q1 is switched from an off state to an on state, so as to implement on control of the switch unit 220.
Further, the switching unit 220 includes: one end of a third resistor R3 and a switch tube, one end of the third resistor R3 is connected to the other end of the first capacitor C1 and the collector of the triode Q1, the other end of the third resistor R3 is connected to the voltage dividing unit 230 and the first end of the switch tube, the second end of the switch tube is connected to the battery 12, and the third end of the switch tube is connected to the voltage dividing unit 230; in the embodiment, the switch tube is an MOS tube, the first end of the switch tube is a grid electrode of the MOS tube, the second end of the switch tube is a source electrode of the MOS tube, and the third end of the switch tube is a drain electrode of the MOS tube; when the transistor Q1 is turned on, the gate level of the MOS transistor is pulled low, and the MOS transistor is switched from the off state to the on state, so that the battery 12 is connected to the voltage dividing unit 230, and the voltage dividing unit 230 divides the supply voltage of the battery 12 for sampling.
Furthermore, the voltage dividing unit 230 includes a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a second capacitor C2 and a third capacitor C3, one end of the fourth resistor R4 and one end of the second capacitor C2 are both connected to the battery 12, the other end of the fourth resistor R4 and the other end of the second capacitor C2 are both connected between the other end of the third resistor R3 and the first end of the switching tube, one end of the fifth resistor R5 is connected to the third end of the switching tube, the other ends of the fifth resistor R5, the sixth resistor R6 and the third capacitor C3 are all connected to the ADC _ VF signal end of the control chip U1, the other end of the sixth resistor R6 and the other end of the third capacitor C3 are both grounded, when the MOS transistor is turned on, the supply voltage of the battery 12 will be divided by the fourth resistor R4 and the fifth resistor R5, so that the ADC _ VF signal terminal of the control chip U1 obtains 1/3 of the voltage of the battery 12, thereby realizing the judgment of the state of the motor 13 through the converted value of the voltage ADC of the battery 12.
The MOS transistor in the embodiment is a P-channel MOS transistor, and the BAT _ VCC is cut off under the switching action, so that the standby power consumption of the whole machine of the product can be reduced to the maximum extent. The N-type triode Q1 is controlled by the level output of the control chip U1 and is mainly used for placing BAT _ VCC high voltage to directly act on the control chip U1I/O, and the system reliability is improved.
Further, the motor driving module 300 includes a driving chip U2, a fourth capacitor C4 and a fifth capacitor C5, wherein the 4 th pin of the driving chip U2, one end of the fourth capacitor C4 and one end of the fifth capacitor C5 are both connected to the battery 12, the other end of the fourth capacitor C4 and the other end of the fifth capacitor C5 are both grounded, the 5 th pin of the driving chip U2 and the 6 th pin of the driving chip U2 are both connected to the 2 nd pin of the motor 13, and the 7 th pin of the driving chip U2 and the 8 th pin of the driving chip U2 are both connected to the 1 st pin of the motor 13; the model of the driver chip U2 in this embodiment is TA6586, but in other embodiments, a driver chip U2 with the same function may also be selected, which is not limited in the present invention; the motor 13 is driven to rotate by the driving chip U2 according to the rotation control signal output by the control chip U1, so that the control chip U1 can detect the electric quantity of the battery 12 after the motor 13 rotates, and further determine whether the motor 13 is locked.
Further, the present invention also provides a method for detecting a locked rotor of a motor, which is applied to a system for detecting a locked rotor of a motor, where the system for detecting a locked rotor of a motor includes a main control module, an electric quantity detection module and a motor driving module, and please refer to fig. 4, where the method includes the following steps:
s100, outputting a first enabling signal to an electric quantity detection module based on the main control module, outputting a rotation control signal to the motor driving module and outputting a second enabling signal to the electric quantity detection module after a first preset time length;
s200, driving the motor to rotate according to the rotation control signal based on the motor driving module;
s300, acquiring a first electric quantity value of the battery within a first preset time period according to the first enabling signal based on the electric quantity detection module, acquiring a second electric quantity value of the battery within a second preset time period according to the second enabling signal, and outputting the first electric quantity value and the second electric quantity value to the main control module;
and S400, stopping outputting the rotation control signal when the main control module judges that the motor is locked according to the first electric quantity value and the first electric quantity value.
Further, please refer to fig. 5 together for better understanding of the working principle of the motor stalling detection system provided by the present invention, the working process of the motor stalling detection system provided by the present invention is described in detail according to the application embodiment, that is, the detection steps of the motor stalling detection system are as follows:
S10, the control chip acquires a first electric quantity value;
s20, the control chip controls the motor to be started;
s30, the control chip acquires a second electric quantity value;
s40, judging whether the motor is locked, if so, executing a step S50, and if not, opening the door successfully;
and S50, stopping outputting the rotation control signal and controlling the alarm module to perform voice prompt.
In the process of opening the intelligent door lock, the unlocking mode of fingerprint authentication is taken as an example in the embodiment; the fingerprint information of the user is acquired through the fingerprint module, when the fingerprint module determines that the fingerprint information is qualified, namely the fingerprint of the user is successfully authenticated, a starting instruction is output to the control chip, the control chip controls the electric quantity detection module to work, and a first electric quantity value is acquired through the electric quantity detection module; after the control chip acquires the first electric quantity value, a rotation control signal is output to the motor driving module, and the motor is controlled to start and rotate through the motor driving module; when the control chip outputs the rotation control signal, the control chip controls the electric quantity detection module to detect the electric quantity of the battery again, and a second electric quantity value is obtained through the electric quantity detection module; the control chip performs least square fitting on the slope value of the electric quantity change curve according to the first electric quantity value and the second electric quantity value, and judges whether the slope value of the electric quantity change curve exceeds the range of the battery electric quantity change slope of normal motor operation; if the control chip judges that the slope value of the electric quantity change curve exceeds the range of the battery electric quantity change slope of the normal motor, the motor is blocked at the moment, and then the control chip stops outputting a rotation control signal to stop the motor to work, so that the failure of opening the door is indicated; meanwhile, the control chip controls the alarm module to perform voice alarm prompt to eliminate locked rotor so as to conveniently perform fault maintenance on the intelligent door lock; if the control chip judges that the slope value of the electric quantity change curve does not exceed the range of the battery electric quantity change slope of the normal motor, the motor is successfully opened, no locked rotor occurs, and the intelligent door lock works normally and is successfully opened.
In summary, the present invention provides a system and a method for detecting a locked-rotor of a motor, wherein the system for detecting a locked-rotor of a motor includes a main control module, an electric quantity detection module, and a motor driving module, the main control module is configured to output a first enable signal to the electric quantity detection module, output a rotation control signal to the motor driving module after a first preset duration, and output a second enable signal to the electric quantity detection module; the motor driving module is used for driving the motor to rotate according to the rotation control signal; the electric quantity detection module is used for acquiring a first electric quantity value of the battery within a first preset time period according to the first enabling signal, acquiring a second electric quantity value of the battery within a second preset time period according to the second enabling signal and outputting the second electric quantity value to the main control module; the main control module is also used for stopping outputting the rotation control signal when the motor is judged to be locked according to the first electric quantity value and the second electric quantity value, so that the motor is effectively detected, and the detection accuracy and reliability are improved.
It should be understood that equivalents and modifications to the invention as described herein may occur to those skilled in the art, and all such modifications and alterations are intended to fall within the scope of the appended claims.
Claims (10)
1. A motor locked rotor detection system is characterized by comprising:
the system comprises a main control module, an electric quantity detection module and a motor driving module, wherein the main control module is respectively connected with the electric quantity detection module and the motor driving module;
the main control module is used for outputting a first enabling signal to the electric quantity detection module, outputting a rotation control signal to the motor driving module and outputting a second enabling signal to the electric quantity detection module after a first preset time length;
the motor driving module is used for driving the motor to rotate according to the rotation control signal;
the electric quantity detection module is used for acquiring a first electric quantity value of the battery within a first preset time according to the first enabling signal, acquiring a second electric quantity value of the battery within a second preset time according to the second enabling signal, and outputting the first electric quantity value and the second electric quantity value to the main control module;
the main control module is further used for stopping outputting the rotation control signal when the motor is judged to be locked according to the first electric quantity value and the second electric quantity value.
2. The motor stall detection system of claim 1 further comprising:
the alarm module is connected with the main control module;
the main control module is also used for outputting an alarm control signal to the alarm module when the motor is judged to be locked;
the alarm module is used for outputting an alarm voice signal according to the alarm control signal.
3. The motor stall detection system of claim 2, further comprising:
the fingerprint module is connected with the main control module and used for acquiring fingerprint information and outputting a starting instruction to the main control module when the fingerprint information is determined to be qualified.
4. The motor locked-rotor detection system according to claim 3, wherein the main control module comprises a control chip, and the control chip is respectively connected with the motor driving module, the electric quantity detection module, the fingerprint module and the alarm module;
the control chip is used for calculating a slope value of an electric quantity change curve according to the first electric quantity value and the second electric quantity value, determining that the motor is locked when the slope value of the electric quantity change curve is judged to be larger than a preset value, stopping outputting the rotation control signal and outputting the alarm control signal to the alarm module.
5. The motor stall detection system of claim 4, wherein the power detection module comprises:
the driving unit is respectively connected with the switch unit and the control chip, the switch unit is connected with the voltage dividing unit, and the voltage dividing unit is respectively connected with the battery and the control chip.
6. The motor stall detection system of claim 5, wherein the drive unit comprises:
first resistance, second resistance, triode and first electric capacity, the one end of first resistance is connected control chip's ADC _ EN signal end, the other end of first resistance is connected the one end of second resistance with the base of triode, the projecting pole of triode the other end of second resistance with the one end of first electric capacity is all ground connection, the other end of first electric capacity with the collecting electrode of triode is connected the switch unit.
7. The motor stall detection system of claim 6, wherein the switch unit comprises:
the voltage divider comprises a third resistor and a switch tube, wherein one end of the third resistor is connected with the other end of the first capacitor and the collector of the triode, the other end of the third resistor is connected with the voltage dividing unit and the first end of the switch tube, the second end of the switch tube is connected with the battery, and the third end of the switch tube is connected with the voltage dividing unit.
8. The motor stall detection system of claim 7, wherein the voltage divider unit comprises:
the battery is connected with the other end of the fourth resistor and the other end of the second capacitor, the other end of the fifth resistor is connected with the other end of the third resistor and the first end of the switch tube, one end of the fifth resistor is connected with the third end of the switch tube, the other end of the fifth resistor, one end of the sixth resistor and one end of the third capacitor are connected with the ADC _ VF signal end of the control chip, and the other end of the sixth resistor and the other end of the third capacitor are grounded.
9. The motor stall detection system of claim 5, wherein the motor drive module comprises:
the driving circuit comprises a driving chip, a fourth capacitor and a fifth capacitor, wherein the 4 th pin of the driving chip, one end of the fourth capacitor and one end of the fifth capacitor are connected with the battery, the other end of the fourth capacitor and the other end of the fifth capacitor are grounded, the 5 th pin of the driving chip and the 6 th pin of the driving chip are connected with the 2 nd pin of the motor, and the 7 th pin of the driving chip and the 8 th pin of the driving chip are connected with the 1 st pin of the motor.
10. A motor locked-rotor detection method is applied to a motor locked-rotor detection system, the motor locked-rotor detection system comprises a main control module, an electric quantity detection module and a motor driving module, and the motor locked-rotor detection method is characterized by comprising the following steps:
outputting a first enabling signal to an electric quantity detection module based on the main control module, outputting a rotation control signal to the motor driving module and outputting a second enabling signal to the electric quantity detection module after a first preset time length;
driving the motor to rotate according to the rotation control signal based on the motor driving module;
acquiring a first electric quantity value of the battery within a first preset time period according to the first enabling signal and a second electric quantity value of the battery within a second preset time period according to the second enabling signal based on the electric quantity detection module, and outputting the first electric quantity value and the second electric quantity value to the main control module;
and stopping outputting the rotation control signal when the main control module judges that the motor is locked according to the first electric quantity value and the first electric quantity value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011556394.0A CN114678836A (en) | 2020-12-24 | 2020-12-24 | Motor locked-rotor detection system and detection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011556394.0A CN114678836A (en) | 2020-12-24 | 2020-12-24 | Motor locked-rotor detection system and detection method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114678836A true CN114678836A (en) | 2022-06-28 |
Family
ID=82070245
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011556394.0A Pending CN114678836A (en) | 2020-12-24 | 2020-12-24 | Motor locked-rotor detection system and detection method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114678836A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117292467A (en) * | 2023-11-01 | 2023-12-26 | 苏州琨山通用锁具有限公司 | High-reliability hidden intelligent door lock control system and control method |
-
2020
- 2020-12-24 CN CN202011556394.0A patent/CN114678836A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117292467A (en) * | 2023-11-01 | 2023-12-26 | 苏州琨山通用锁具有限公司 | High-reliability hidden intelligent door lock control system and control method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113296022B (en) | Real-time diagnosis method for active short-circuit state of motor | |
| CN103715946A (en) | Motor starting method, motor starting device and motor | |
| CN114678836A (en) | Motor locked-rotor detection system and detection method | |
| CN105846732A (en) | Control circuit | |
| CN115102463A (en) | Motor locked-rotor detection method and device | |
| CN205792320U (en) | A kind of brushless DC motor control circuit | |
| CN113338743B (en) | Anti-pinch control system of electric tail gate | |
| CN112953312B (en) | Motor-equipped device and method and device for improving shutdown tail sound of motor-equipped device | |
| WO2018137693A1 (en) | Electric tool control method and electric tool | |
| CN113067312A (en) | Motor locked-rotor protection circuit | |
| US6555930B1 (en) | Device for automatically detecting a generator type of a motor vehicle | |
| CN115579989B (en) | Charging control circuit and control method | |
| CN1243939A (en) | Device and method for controlling compressor of refrigerator | |
| CN109916615B (en) | Full-automatic lock tongue state detection method and device | |
| CN111970164A (en) | System, method, device, terminal and storage medium for detecting state of communication module | |
| CN113608091A (en) | Double-pulse test protection method and device | |
| CN203213794U (en) | Car window remote-control elevation control device with high-reliable protection function | |
| CN207037366U (en) | Electric tool control device for pivoting and electric tool | |
| WO2021129212A1 (en) | Motor starting method, motor brake control method, device and electrical equipment | |
| EP3995261A1 (en) | Power tool and control method thereof | |
| US20240032466A1 (en) | Cutting tool and control method | |
| CN108051740A (en) | A kind of detecting system and detection method of motor open fault | |
| CN215813163U (en) | Fault detection circuit, BMS system, power supply unit and trade electric cabinet of switch pipe | |
| JP3343022B2 (en) | Actuator failure judgment device | |
| CN114384439A (en) | Detection method and equipment for automobile emergency starting power supply |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |