CN111398822A - Two-wire DC motor circuit detection system - Google Patents

Abstract

The application relates to a circuit detection system for a two-wire DC motor, comprising: the main control module comprises a control chip; the motor driving module is electrically connected with the main control module and comprises a motor inserting terminal, an inserting detection module and a locked rotor detection module, wherein the motor inserting terminal is electrically connected with a conductive terminal of the two-wire direct current motor, and the inserting detection module is used for detecting whether the two-wire direct current motor is electrically connected with the motor driving module; and the locked rotor detection module is used for detecting whether the two-wire type direct current motor is locked rotor or not. Therefore, the circuit detection system of the two-wire direct current motor can effectively detect the electric connection and locked rotor state of the two-wire direct current motor circuit.

Description

Two-wire DC Motor Circuit Detection System

technical field

The present application relates to the field of circuit detection, and in particular, to a circuit detection system for a two-wire DC motor.

Background technique

A DC motor is a motor that converts DC electrical energy into mechanical energy. It is widely used in electric traction due to its good speed regulation performance. The power factor is extremely low during rotation, and the current when the rotor is locked can reach up to 7 times the rated current. If the time is a little longer, the motor will be burned out, resulting in property damage. At the same time, there is no effective electrical connection between the motor power supply and the motor drive module. It is also a common problem that the working state of the motor cannot be detected in real time. In reality, there is a lack of detection systems for the electrical connection and the locked rotor state of the two-wire DC motor circuit. Therefore, the circuit detection system of the two-wire DC motor is of great significance to ensure the safety of the two-wire DC motor.

SUMMARY OF THE INVENTION

An advantage of the present application is to provide a circuit detection system for a two-wire DC motor, wherein whether the two-wire DC motor is electrically connected to a motor drive module can be effectively detected by the circuit detection system.

Another advantage of the present application is to provide a circuit detection system for a two-wire DC motor, wherein the circuit detection system can effectively reduce the user's time cost and improve work efficiency.

Another advantage of the present application is to provide a circuit detection system for a two-wire DC motor, wherein whether the two-wire DC motor is locked can be effectively detected by the circuit detection system.

Another advantage of the present application is to provide a circuit detection system for a two-wire DC motor, wherein the motor safety can be effectively protected by the circuit detection system.

Another advantage of the present application is to provide a circuit detection system for a two-wire DC motor, wherein the circuit detection system for the two-wire DC motor has a simple structure and low cost.

In order to achieve at least one of the above advantages, the present application provides a circuit detection system for a two-wire DC motor, including: a main control module of a control chip; a motor drive module electrically connected to the main control module, including a motor insertion terminal, which is inserted into A detection module and a locked-rotor detection module, the motor insertion terminal is used to be electrically connected to the conductive terminal of the two-wire DC motor, and the insertion detection module is used to detect whether the two-wire DC motor is connected to the motor drive module The electrical connection is realized; the locked-rotor detection module is used to detect whether the locked-rotor occurs in the two-wire DC motor.

In a circuit detection system for a two-wire DC motor provided according to the present application, the insertion detection module includes: a resistor R17, a triode Q3, and a detection port electrically connected to the triode Q3, wherein the insertion detection is performed When the control chip is used to control the pin output of the motor drive module to output a low level, when the motor insertion terminal is not inserted into the conductive terminal of the two-wire DC motor, the transistor Q3 works at In the cut-off region, the detection port is at a high level; when the motor insertion terminal is inserted into the conductive terminal of the two-wire DC motor, the transistor Q3 works in the saturation region, and the detection port is at a high level.

In a circuit detection system for a two-wire DC motor provided according to the present application, the locked rotor detection module includes a transistor Q1, a transistor Q2, a diode D1, a diode D2, a resistor R8, a transistor Q1, a transistor Q2, a diode D1, a diode D2, The resistor R5, the transistor Q3 and the op-amp chip, wherein, during the stall detection, the pin in the control chip used to control the motor drive module outputs a high level, in response to the two-wire DC The motor is locked, the current flowing through the resistor R8 increases, the voltage of the resistor R8 increases, and the op amp chip controls the pin in the control chip for controlling the motor drive module to output low power level to protect the two-wire DC motor.

In a circuit detection system of a two-wire DC motor provided according to the present application, the triode Q1 and the triode Q4 form a totem pole structure of a transistor for controlling the triode Q3.

In a circuit detection system for a two-wire DC motor provided according to the present application, the diode D1 and the diode D2 are configured to control the voltage electrically connected to the operational amplifier chip to be lower than a preset threshold.

Another circuit detection system for a two-wire DC motor provided according to the present application includes a main control module of a control chip; and a motor drive module electrically connected to the main control module, including a circuit that realizes electrical connection according to a preset circuit. Resistor R16, Resistor R13, Triode Q3, Triode Q4, Resistor R14, Resistor R18, Triode Q3, Resistor R17, Resistor R11, Resistor R8, Resistor R6, Diode D3, Resistor R15, Triode Q2, Detection Port, Resistor R7, Diode D1 , diode D2, capacitor C3, resistor R5, op amp chip, resistor R10, resistor R9, resistor R12 and capacitor C6, wherein, during insertion detection, the control chip is used to control the pin of the motor drive module Output low level, when the motor insertion terminal is not inserted into the conductive terminal of the two-wire DC motor, the transistor Q3 works in the cut-off area, and the detection port is high level; when the motor is inserted into the terminal When inserted into the conductive terminal of the two-wire DC motor, the transistor Q3 works in the saturation region, and the detection port is at a high level.

In another circuit detection system for a two-wire DC motor provided according to the present application, when the locked-rotor detection is performed, the pin in the control chip used to control the motor drive module outputs a high level, and responds to The two-wire DC motor is locked, the current flowing through the resistor R8 increases, and the voltage of the resistor R8 increases, and the op amp chip controls the control chip for controlling the motor drive module. The pin outputs low level to protect the two-wire DC motor.

In another circuit detection system of a two-wire DC motor provided according to the present application, the triode Q1 and the triode Q4 form a totem pole structure of a transistor for controlling the triode Q3.

In another circuit detection system of a two-wire DC motor provided according to the present application, the diode D1 and the diode D2 are configured to control the voltage electrically connected to the operational amplifier chip to be lower than a preset threshold.

Further objects and advantages of the present invention will be fully realized by an understanding of the ensuing description and drawings.

These and other objects, features and advantages of the present application are fully embodied by the following detailed description, drawings and claims.

Description of drawings

These and or other aspects and advantages of the present application will become more apparent and easier to understand from the following detailed description of embodiments of the present invention in conjunction with the accompanying drawings, wherein:

FIG. 1 illustrates a system schematic diagram of a two-wire DC motor circuit detection system according to an embodiment of the present application.

FIG. 2 illustrates one of the schematic diagrams of the main control modules of the two-wire DC motor circuit detection system according to the embodiment of the present application.

FIG. 3 illustrates the second schematic diagram of the main control module of the two-wire DC motor circuit detection system according to the embodiment of the present application.

FIG. 4 illustrates the third schematic diagram of the main control module of the two-wire DC motor circuit detection system according to the embodiment of the present application.

FIG. 5 illustrates the fourth schematic diagram of the main control module of the two-wire DC motor circuit detection system according to the embodiment of the present application.

FIG. 6 illustrates a circuit diagram of a motor driving module of a two-wire DC motor circuit detection system according to an embodiment of the present application.

Detailed ways

The terms and words used in the following specification and claims are not limited to the bibliographical meanings, but, are merely used by the inventor to enable a clear and consistent understanding of the present application. Accordingly, it is apparent to those skilled in the art that the following description of various embodiments of the present application is provided for illustration purposes only and not for the purpose of limiting the application as defined by the appended claims and their equivalents.

It should be understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be one. The number may be plural, and the term "one" should not be understood as a limitation on the number.

Although ordinals such as "first," "second," etc. will be used to describe various components, those components are not limited herein. This term is only used to distinguish one component from another. For example, a first component could be termed a second component, and similarly, a second component could be termed a first component, without departing from the teachings of the inventive concept. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The terminology used herein is for the purpose of describing the various embodiments only and is not intended to be limiting. As used herein, the singular form is intended to include the plural form as well, unless the context clearly dictates an exception. It will also be understood that the terms "comprising" and/or "having" when used in this specification designate the presence of stated features, numbers, steps, operations, components, elements or combinations thereof, without excluding one or more other features , number, step, operation, component, element, or the presence or addition of a group thereof.

Exemplary Two-Wire DC Motor Circuit Inspection System

FIG. 1 illustrates a system schematic diagram of a two-wire DC motor circuit detection system according to a preferred embodiment of the present application. As shown in FIG. 1 , the two-wire DC motor circuit detection system according to the preferred embodiment of the present application The system 10 includes: a main control module 11 of the control chip, responsible for information collection, storage, analysis and decision-making of the detection system; a motor drive module 12 electrically connected to the main control module, including a motor insertion terminal 21, inserted into the detection module 22 and the locked rotor detection module 23, the motor insertion terminal 21 is used to be electrically connected to the conductive terminal of the two-wire DC motor, and the insertion detection module 22 is used to detect whether the two-wire DC motor is driven with the motor The module 12 is electrically connected; the locked rotor detection module 23 is used to detect whether the two-wire DC motor is locked.

In a possible implementation manner of the present application, the insertion detection module 22 includes: a resistor R17, a transistor Q3, and a detection port electrically connected to the transistor Q3. The pin used to control the motor drive module 12 outputs a low level. When the motor insertion terminal 21 is not inserted into the conductive terminal of the two-wire DC motor, the triode Q3 works in the cut-off area, and the The detection port is at a high level; when the motor insertion terminal is inserted into the conductive terminal of the two-wire DC motor, the transistor Q3 works in the saturation region, and the detection port is at a high level.

In a possible implementation manner of the present application, the locked rotor detection module 23 includes a transistor Q1, a transistor Q2, a diode D1, a diode D2, a resistor R8, a resistor R5 and the transistor Q3 that are electrically connected according to a preset circuit and an operational amplifier chip, wherein, during the stall detection, the pin in the control chip used to control the motor drive module 12 outputs a high level, and in response to the stall of the two-wire DC motor, the current After the current of the resistor R8 increases, the voltage of the resistor R8 increases, and the op amp chip controls the pin of the control chip for controlling the motor drive module 12 to output a low level to protect the The two-wire DC motor.

In particular, in the above possible implementation manner, the triode Q1 and the triode Q4 form a totem pole structure of a transistor for controlling the triode Q3.

Particularly, in the above possible implementation manner, the diode D1 and the diode D2 are configured to control the voltage electrically connected to the operational amplifier chip to be lower than a preset threshold.

2 to 6 illustrate a specific example of the circuit detection system according to an embodiment of the present application. As shown in FIG. 2 to FIG. 6 , the circuit detection system 10 includes a main control module 11 of a control chip and a motor drive module 12 electrically connected to the main control module. The circuit structure of the main control module in the specific example, wherein FIG. 2 illustrates an example of the control chip of the main control module in this specific example, and FIG. 3 to FIG. 5 illustrate the specific example in Other necessary electronic components in the main control module described in . It should be understood that in other examples of the present application, the main control module may further include other electronic components, or the same electronic components may be arranged in other ways, as long as the preset control function can be implemented. FIG. 6 illustrates the circuit structure of the motor drive module 12 in this specific example. As shown in FIG. 6 , the motor drive module 12 is electrically connected to a resistor R16 , a resistor R13 , and a transistor Q3 according to a preset circuit. , transistor Q4, resistor R14, resistor R18, transistor Q3, resistor R17, resistor R11, resistor R8, resistor R6, diode D3, resistor R15, transistor Q2, detection port, resistor R7, diode D1, diode D2, capacitor C3, resistor R5, operational amplifier chip, resistor R10, resistor R9, resistor R12 and capacitor C6. It should be understood that the motor drive module shown in FIG. 6 is only for illustration, and in other examples of the present application, the motor drive module may also include other electronic components, or the same electronic components can be connected in other circuit forms , it only needs to complete the preset function, which is not limited by this application.

Specifically, during the specific operation of the circuit detection system: when performing insertion detection, the pin in the control chip used to control the motor drive module 12 outputs a low level, and when the motor insertion terminal is not When the conductive terminal of the two-wire DC motor is inserted, the transistor Q3 works in the cut-off region, and the detection port is at a high level; when the motor insertion terminal is inserted into the conductive terminal of the two-wire DC motor , the transistor Q3 works in the saturation region, and the detection port is at a high level.

More specifically, after the U1 chip is powered on, the pin PA4 outputs a low level. At this time, the transistor Q3 (MOS tube) works in the cut-off area. If the terminal P1 is not inserted into the motor, the label "Motor" is due to the pull-down resistor of R17. The flat is 0V, so the transistor Q2 works in the cut-off region. At this time, the detection label "Motor-C" is high level.

Further, if the terminal P1 is inserted into the motor, because the internal resistance of the motor is very small, 12V passes through the internal resistances R8, R11, and R15 of the motor. At this time, the transistor Q2 works in the saturation region, and the detection label "Motor-C" is at a low level.

During the stall detection, the pin in the control chip used to control the motor drive module 12 outputs a high level, and in response to the two-wire DC motor stalled, the current flowing through the resistor R8 increases, the voltage of the resistor R8 increases, and the op amp chip controls the pin in the control chip for controlling the motor drive module 12 to output a low level to protect the two-wire DC motor.

More specifically, in particular, after the U1 chip is powered on, the pin PA4 outputs a high level. If it is judged that the terminal P1 has been inserted into a motor, let the single-chip microcomputer PA4 pin output a high level. At this time, the transistor Q1 is turned on, and the transistor Q3 (MOS tube) is also turned on, and it is detected that the label "Motor" is low level at this time, and the transistor Q2 is not turned on to detect that the label "Motor-C" is low level.

Further, if the motor is locked, the current flowing through the resistor R8 increases, and the voltage of the resistor R8 increases. After the operational amplifier U2 is output to the microcontroller, then the PA4 pin of the microcontroller outputs a low level, so that the motor and the transistor Q3 (MOS tube) can be protected from damage.

Further, the diode D1 and diode D2 clamp the voltage on the left side of the resistor R5 at 3.3+0.7V through the resistor R6 and the diode D1 when the motor is inserted into the terminal P1 and not running, so that the voltage on the left side of the resistor R5 is clamped to 3.3+0.7V, so that the The high voltage goes to the operational amplifier U2. The op amp chip is protected. In particular, the signal is directly connected to the AD pin of the main control chip without going through the op amp. The existence of the diode D1 can also protect the main control chip.

Particularly, in this specific example, the triode Q1 and the triode Q4 form a totem pole structure of a transistor for controlling the triode Q3.

In particular, in this particular example, the diode D1 and the diode D2 are configured to control the voltage electrically connected to the op amp chip to be lower than a preset threshold.

It is worth mentioning that the internal structure of the MOS tube determines that a relatively large current is required to turn on the MOS, so that the MOS tube can quickly cross the platform area (at this time, only the current is increased and the voltage is not increased), so that the MOS tube can quickly cross the platform area. Fever is small. When the single-chip microcomputer PA4 is at a high level, the transistor Q1 turns on 3.3V and directly passes through the transistor Q1 and the resistor R14 to quickly turn on the MOS tube. When the single-chip microcomputer PA4 is at a low level, the transistor Q1 does not conduct. Because the transistor Q3 (MOS tube) GS has a junction capacitor with electricity on it, it can quickly discharge through the resistor R14 and the transistor Q4. In this way, the transistor Q3 (MOS tube) can work in high frequency switching.

Further, the function of M7 is to input the back electromotive force generated by the motor to 12V when the motor stops immediately, and play a backflow role.

The basic principles of the present application have been described above in conjunction with specific embodiments. However, it should be pointed out that the advantages, advantages, effects, etc. mentioned in the present application are only examples rather than limitations, and these advantages, advantages, effects, etc., are not considered to be Required for each embodiment of this application. In addition, the specific details disclosed above are only for the purpose of example and easy understanding, rather than limiting, and the above-mentioned details do not limit the application to be implemented by using the above-mentioned specific details.

The block diagrams of devices, apparatuses, apparatuses, and systems referred to in this application are only illustrative examples and are not intended to require or imply that the connections, arrangements, or configurations must be in the manner shown in the block diagrams. As those skilled in the art will appreciate, these means, apparatuses, apparatuses, systems may be connected, arranged, configured in any manner. Words such as "including", "including", "having" and the like are open-ended words meaning "including but not limited to" and are used interchangeably therewith. As used herein, the words "or" and "and" refer to and are used interchangeably with the word "and/or" unless the context clearly dictates otherwise. As used herein, the word "such as" refers to and is used interchangeably with the phrase "such as but not limited to".

It should also be pointed out that in the apparatus, equipment and method of the present application, each component or each step can be decomposed and/or recombined. These disaggregations and/or recombinations should be considered as equivalents of the present application.

The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use this application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other aspects without departing from the scope of the application. Therefore, this application is not intended to be limited to the aspects shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

It should be understood by those skilled in the art that the embodiments of the present invention shown in the above description and the accompanying drawings are only examples and do not limit the present invention. The objects of the present invention have been fully and effectively achieved. The functional and structural principles of the present invention have been shown and described in the embodiments, and the embodiments of the present invention may be modified or modified in any way without departing from the principles.

Claims (9)

1. A circuit detection system for a two-wire DC motor is characterized in that, comprising: a main control module comprising a control chip; and a motor drive module electrically connected to the main control module, comprising a motor insertion terminal, inserted into A detection module and a locked-rotor detection module, the motor insertion terminal is used to be electrically connected to the conductive terminal of the two-wire DC motor, and the insertion detection module is used to detect whether the two-wire DC motor is connected to the motor drive module The electrical connection is realized; the locked-rotor detection module is used to detect whether the locked-rotor occurs in the two-wire DC motor. 2 . The circuit detection system according to claim 1 , wherein the insertion detection module comprises: a resistor R17 , a triode Q3 , and a detection port electrically connected to the triode Q3 , wherein, when the insertion detection is performed, the The pin in the control chip for controlling the motor drive module outputs a low level, and when the motor insertion terminal is not inserted into the conductive terminal of the two-wire DC motor, the transistor Q3 works in the cut-off area, so the The detection port is at a high level; when the motor insertion terminal is inserted into the conductive terminal of the two-wire DC motor, the transistor Q3 works in the saturation region, and the detection port is at a high level. 3. The circuit detection system according to claim 2, wherein the locked rotor detection module comprises a triode Q1, a triode Q2, a diode D1, a diode D2, a resistor R8, a resistor R5 and all the The triode Q3 and the operational amplifier chip, wherein, when the locked-rotor detection is performed, the pin in the control chip used to control the motor drive module outputs a high level, in response to the two-wire DC motor being locked , the current flowing through the resistor R8 increases, the voltage of the resistor R8 increases, and the op amp chip controls the pin in the control chip for controlling the motor drive module to output a low level to protect the The two-wire DC motor. 4. The circuit detection system according to claim 3, wherein the triode Q1 and the triode Q4 form a totem pole structure of a transistor for controlling the triode Q3. 5. The circuit detection system of claim 3, wherein the diode D1 and the diode D2 are configured to control a voltage electrically connected to the op amp chip to be lower than a preset threshold. 6. A circuit detection system for a two-wire DC motor, comprising: a main control module comprising a control chip; and a motor drive module electrically connected to the main control module, comprising: Electrically connected resistor R16, resistor R13, transistor Q3, transistor Q4, resistor R14, resistor R18, transistor Q3, resistor R17, resistor R11, resistor R8, resistor R6, diode D3, resistor R15, transistor Q2, detection port, resistor R7 , diode D1, diode D2, capacitor C3, resistor R5, operational amplifier chip, resistor R10, resistor R9, resistor R12 and capacitor C6, wherein, during insertion detection, the control chip is used to control the motor drive module The pin outputs a low level, when the motor insertion terminal is not inserted into the conductive terminal of the two-wire DC motor, the transistor Q3 works in the cut-off area, and the detection port is at a high level; when the When the motor insertion terminal is inserted into the conductive terminal of the two-wire DC motor, the transistor Q3 works in the saturation region, and the detection port is at a high level. 7 . The circuit detection system according to claim 6 , wherein, when the locked-rotor detection is performed, a pin in the control chip for controlling the motor drive module outputs a high level, in response to the two-wire type The DC motor is locked, the current flowing through the resistor R8 increases, the voltage of the resistor R8 increases, and the op amp chip controls the control chip in the control chip for controlling the motor drive module. The pin output is low level to protect the two-wire DC motor. 8 . The circuit detection system according to claim 7 , wherein the transistor Q1 and the transistor Q4 form a totem pole structure of a transistor for controlling the transistor Q3 . 9. The circuit detection system of claim 8, wherein the diode D1 and the diode D2 are configured to control a voltage electrically connected to the op amp chip to be lower than a preset threshold.

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