CN111398822A

CN111398822A - Two-wire DC motor circuit detection system

Info

Publication number: CN111398822A
Application number: CN202010389730.0A
Authority: CN
Inventors: 薛强
Original assignee: Kamoer Fluid Technology Shanghai Co Ltd
Current assignee: Kamoer Fluid Technology Shanghai Co Ltd
Priority date: 2020-05-11
Filing date: 2020-05-11
Publication date: 2020-07-10

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 application relates to the field of circuit detection, in particular to a circuit detection system for a two-wire direct current motor.

Background

The direct current motor is a motor which converts direct current electric energy into mechanical energy, and is widely applied to electric mops due to good speed regulation performance, in industrial practice, the problems of locked rotor and the like often occur in the use process of the two-wire direct current motor, the power factor is extremely low when the motor is locked, the current in the locked rotor can reach 7 times of rated current at most, the motor can be burnt out after a long time, property loss is caused, meanwhile, the problem that the working state of the motor cannot be detected in real time due to the fact that effective electric connection does not exist between a motor power supply and a motor driving module is a common problem, and a detection system for the electric connection and locked rotor state of the two-wire direct current motor circuit is lacked in reality. Therefore, the circuit detection system of the two-wire direct current motor has important significance for guaranteeing the use safety of the two-wire direct current motor.

Disclosure of Invention

An 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 detect whether the two-wire dc motor is electrically connected to a motor driving module.

Another advantage of the present application is to provide a circuit detecting system for a two-wire dc motor, wherein the time cost of a user can be effectively reduced and the work efficiency can be improved by the circuit detecting 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 detect whether a stall occurs in the two-wire dc motor.

Another advantage of the present application is to provide a circuit detection system for a two-wire dc motor, wherein the motor 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 a low cost.

To achieve at least one of the above advantages, the present application provides a circuit detecting system of a two-wire dc motor, including: a main control module of the 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 used for being 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.

In a circuit testing system of a two-wire dc motor according to the present application, the insertion detection module includes: the detection circuit comprises a resistor R17, a triode Q3 and a detection port electrically connected to the triode Q3, wherein during insertion detection, a pin in the control chip is used for controlling the motor driving module to output a low level, when the motor insertion terminal is not inserted into a conductive terminal of the two-wire direct current motor, the triode Q3 works in a cut-off region, and the detection port is a high level; when the motor plug-in terminal is plugged into the conductive terminal of the two-wire DC motor, the triode Q3 works in a saturation region, and the detection port is at a high level.

In a circuit detection system according to two-wire dc motor that this application provided, lock-up detection module includes triode Q1, triode Q2, diode D1, diode D2, resistance R8, resistance R5 and triode Q3 and operational amplifier chip that realize the electricity and connect according to preset circuit, wherein, when carrying out lock-up detection, be used for controlling among the control chip motor drive module's pin output high level, respond to two-wire dc motor takes place the lock-up, flows through resistance R8's electric current increase, resistance R8's voltage risees, operational amplifier chip control be used for controlling among the control chip motor drive module's pin output low level, in order to protect two-wire dc motor.

In the circuit detection system of the two-wire direct current motor, the transistor Q1 and the transistor Q4 form a totem-pole structure of transistors, and are used for controlling the transistor Q3.

In the circuit detection system of the two-wire direct current motor, 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 value.

Another circuit detection system for a two-wire dc motor according to the present application includes a main control module for controlling a chip; the motor driving module is electrically connected with the main control module and comprises a resistor R16, a resistor R13, a triode Q3, a triode Q4, a resistor R14, a resistor R18, a triode Q3, a resistor R17, a resistor R11, a resistor R8, a resistor R6, a diode D3, a resistor R15, a triode Q2, a detection port, a resistor R7, a diode D1, a diode D2, a capacitor C3, a resistor R5, an operational amplifier chip, a resistor R10, a resistor R9, a resistor R12 and a capacitor C6 which are electrically connected according to a preset circuit, wherein during insertion detection, the control chip is used for controlling a pin of the motor driving module to output a low level, when a motor insertion terminal is not inserted into a conductive terminal of the two-wire direct current motor, the triode Q3 works in a cut-off area, and the detection port is a high level; when the motor plug-in terminal is plugged into the conductive terminal of the two-wire DC motor, the triode Q3 works in a saturation region, and the detection port is at a high level.

In another circuit detection system of a two-wire dc motor provided by the present application, when detecting a stall, the control chip is configured to control a pin of the motor driving module to output a high level, and in response to the two-wire dc motor stalling, a current flowing through the resistor R8 increases, a voltage of the resistor R8 increases, and the operational amplifier chip controls a pin of the control chip, which is configured to control the motor driving module, to output a low level, so as to protect the two-wire dc motor.

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

In another circuit detection system of a two-wire dc motor provided in accordance with the present application, 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.

Further objects and advantages of the invention will be fully apparent from the ensuing description and drawings.

These and other objects, features and advantages of the present application will become more fully apparent from the following detailed description, the accompanying drawings and the claims.

Drawings

These and or other aspects and advantages of the present application will become more apparent and more readily appreciated from the following detailed description of embodiments of the invention, taken in conjunction with the accompanying drawings of which:

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

Fig. 2 illustrates one of the master module schematic diagrams of a two-wire dc motor circuit detection system according to an embodiment of the present application.

Fig. 3 illustrates a second schematic diagram of a master module of a two-wire dc circuit detection system according to an embodiment of the present application.

Fig. 4 illustrates a third schematic diagram of a master module of a two-wire dc motor circuit detection system according to an embodiment of the present application.

Fig. 5 illustrates a fourth schematic diagram of a master control module of a two-wire dc circuit detection system according to an embodiment of the present application.

Fig. 6 illustrates a motor drive module circuit diagram of a two-wire dc motor circuit detection system according to an embodiment of the present application.

Detailed Description

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

It is understood that the terms "a" and "an" should be interpreted as meaning that a number of one element or element is one in one embodiment, while a number of other elements is one in another embodiment, and the terms "a" and "an" should not be interpreted as limiting the number.

While ordinal numbers such as "first," "second," etc., will be used to describe various components, those components are not limited herein. The term is used only to distinguish one element 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 concepts. 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 various embodiments only and is not intended to be limiting. As used herein, the singular forms are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, numbers, steps, operations, components, elements, or combinations thereof, but do not preclude the presence or addition of one or more other features, numbers, steps, operations, components, elements, or groups thereof.

Exemplary two-wire DC Circuit detection 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, and as shown in fig. 1, the two-wire dc motor circuit detection system 10 according to the preferred embodiment of the present application includes: the main control module 11 of the control chip is responsible for information concentration, storage, analysis and decision of the detection system; the motor driving module 12 electrically connected to the main control module includes a motor insertion terminal 21, an insertion detection module 22 and a locked rotor detection module 23, where the motor insertion terminal 21 is used to electrically connect to a 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 electrically connected to the motor driving module 12; and the locked-rotor detection module 23 is configured to detect whether the two-wire dc motor is locked-rotor.

In one possible embodiment of the present application, the insertion detection module 22 includes: the detection circuit comprises a resistor R17, a triode Q3 and a detection port electrically connected to the triode Q3, wherein during insertion detection, a pin in the control chip is used for controlling the motor driving module 12 to output a low level, when the motor insertion terminal 21 is not inserted into a conductive terminal of the two-wire direct current motor, the triode Q3 works in a cut-off region, and the detection port is at a high level; when the motor plug-in terminal is plugged into the conductive terminal of the two-wire DC motor, the triode Q3 works in a saturation region, and the detection port is at a high level.

In a possible embodiment of the present application, the stalling detection module 23 includes a transistor Q1, a transistor Q2, a diode D1, a diode D2, a resistor R8, a resistor R5 and a transistor Q3, which are electrically connected according to a preset circuit, wherein when the stalling detection is performed, the control chip is used for controlling the pin output high level of the motor driving module 12, in response to the stalling of the two-wire dc motor occurs, the current flowing through the resistor R8 is increased, the voltage of the resistor R8 is increased, and the operational amplifier chip controls the control chip to control the pin output low level of the motor driving module 12, so as to protect the two-wire dc motor.

In particular, in the possible implementation manners described above, the transistor Q1 and the transistor Q4 constitute a totem-pole structure of transistors for controlling the transistor Q3.

In particular, in the possible implementation manners described above, 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.

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

Specifically, the circuit detection system, when operating specifically: when the insertion detection is performed, the control chip is used for controlling the pin of the motor driving module 12 to output a low level, when the motor insertion terminal is not inserted into the conductive terminal of the two-wire dc motor, the triode Q3 works in a cut-off region, and the detection port is a high level; when the motor plug-in terminal is plugged into the conductive terminal of the two-wire DC motor, the triode Q3 works in a saturation region, and the detection port is at a high level.

More specifically, after the power-on U1 chip normally operates, the pin PA4 outputs a low level, and at this time, the transistor Q3 (MOS transistor) operates in the cut-off region, and if the terminal P1 is not inserted into the Motor, the label "Motor" indicates that the resistance level is 0V after being pulled down by the resistor R17, so the transistor Q2 operates in the cut-off region. At this time, the detection flag "Motor-C" is high.

Further, if the terminal P1 is plugged into the Motor, because the internal resistance of the Motor is small, 12V passes through the internal resistances of the Motor R8, R11 and R15, the transistor Q2 works in the saturation region, the detection flag "Motor-C" is low,

when the locked rotor detection is performed, the pin of the motor driving module 12 is controlled to output a high level in the control chip, and in response to the locked rotor of the two-wire dc motor, the current flowing through the resistor R8 increases, the voltage of the resistor R8 increases, and the operational amplifier chip controls the pin of the motor driving module 12 in the control chip to output a low level, so as to protect the two-wire dc motor.

More specifically, after the power-on U1 chip normally works, the pin PA4 outputs a high level, and if it is determined that the terminal P1 has been inserted into the Motor, the pin PA4 of the single chip microcomputer outputs a high level, at this time, the transistor Q1 is turned on, the transistor Q3 (MOS transistor) is also turned on, the flag "Motor" is detected as a low level, and the flag "Motor-C" is detected as a non-conductive state of the transistor Q2.

Further, if the current flowing through the resistor R8 increases at the time of the motor stalling, the voltage of the resistor R8 increases. The signal is output to the singlechip through the operational amplifier U2, and then the singlechip PA4 pin outputs low level, so that the motor and the triode Q3 (MOS tube) can be protected from being damaged.

Further, when the diode D1 and the diode D2 are inserted into the terminal P1 and are not running, the 12V voltage clamps the voltage on the left side of the resistor R5 to 3.3+0.7V through the resistor R6 and the diode D1, so that a high voltage is not applied to the operational amplifier U2. The operational amplifier chip is protected, and particularly, the signal is directly connected to the AD pin of the main control chip without passing through the operational amplifier, and the main control chip can be protected due to the existence of the diode D1.

In particular, in this particular example, the transistor Q1 and the transistor Q4 form a totem-pole structure of transistors for controlling the transistor 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 below a preset threshold.

It is worth mentioning that the structure inside the MOS transistor determines that a relatively large current is needed to turn on the MOS transistor, so that the MOS transistor can quickly cross the mesa region (only increasing the current without increasing the voltage), and thus the heat generation of the MOS transistor is small. When the single chip microcomputer PA4 is at high level, the transistor Q1 is conducted for 3.3V, and the MOS transistor is conducted fast directly through the transistor Q1 and the resistor R14. When the single chip microcomputer PA4 is at low level, the transistor Q1 is not conducted, and as the transistor Q3 (MOS transistor) GS has electricity on the junction capacitor, rapid discharge can be rapidly carried out through the resistor R14 and the transistor Q4. Thus, the transistor Q3 (MOS transistor) can operate at high frequency.

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

The foregoing describes the general principles of the present application in conjunction with specific embodiments, however, it is noted that the advantages, effects, etc. mentioned in the present application are merely examples and are not limiting, and they should not be considered essential to the various embodiments of the present application. Furthermore, the foregoing disclosure of specific details is for the purpose of illustration and description and is not intended to be limiting, since the foregoing disclosure is not intended to be exhaustive or to limit the disclosure to the precise details disclosed.

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

It should also be noted that in the devices, apparatuses, and methods of the present application, the components or steps may be decomposed and/or recombined. These decompositions and/or recombinations are to be considered as equivalents of the present application.

The previous description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present 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. Thus, the present 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 will be appreciated by persons skilled in the art that the embodiments of the invention described above and shown in the drawings are given by way of example only and are not limiting of the invention. The objects of the invention have been fully and effectively accomplished. The functional and structural principles of the present invention have been shown and described in the examples, and any variations or modifications of the embodiments of the present invention may be made without departing from the principles.

Claims

1. 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.

2. The circuit detection system of claim 1, wherein the insertion detection module comprises: the detection circuit comprises a resistor R17, a triode Q3 and a detection port electrically connected to the triode Q3, wherein during insertion detection, a pin in the control chip is used for controlling the motor driving module to output a low level, when the motor insertion terminal is not inserted into a conductive terminal of the two-wire direct current motor, the triode Q3 works in a cut-off region, and the detection port is a high level; when the motor plug-in terminal is plugged into the conductive terminal of the two-wire DC motor, the triode Q3 works in a saturation region, and the detection port is at a high level.

3. The circuit detection system according to claim 2, wherein the stalling detection module includes a transistor Q1, a transistor Q2, a diode D1, a diode D2, a resistor R8, a resistor R5, a transistor Q3 and an operational amplifier chip, which are electrically connected according to a preset circuit, wherein, when the stalling detection is performed, a pin of the motor driving module in the control chip is controlled to output a high level, and in response to the occurrence of stalling of the two-wire dc motor, a current flowing through the resistor R8 increases, a voltage of the resistor R8 increases, and the operational amplifier chip controls a pin of the control chip for controlling the motor driving module in order to output a low level, so as to protect the two-wire dc motor.

4. The circuit testing system of claim 3, wherein said transistor Q1 and said transistor Q4 form a totem-pole configuration of transistors for controlling said transistor 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 below a preset threshold.

6. 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 resistor R16, a resistor R13, a triode Q3, a triode Q4, a resistor R14, a resistor R18, a triode Q3, a resistor R17, a resistor R11, a resistor R8, a resistor R6, a diode D3, a resistor R15, a triode Q2, a detection port, a resistor R7, a diode D1, a diode D2, a capacitor C3, a resistor R5, an operational amplifier chip, a resistor R10, a resistor R9, a resistor R12 and a capacitor C6 which are electrically connected according to a preset circuit, wherein during insertion detection, the control chip is used for controlling a pin of the motor driving module to output a low level, when a motor insertion terminal is not inserted into a conductive terminal of the two-wire direct current motor, the triode Q3 works in a cut-off area, and the detection port is a high level; when the motor plug-in terminal is plugged into the conductive terminal of the two-wire DC motor, the triode Q3 works in a saturation region, and the detection port is at a high level.

7. The circuit detection system according to claim 6, wherein, during the lock-up detection, the pin of the control chip for controlling the motor driving module outputs a high level, and in response to the lock-up of the two-wire dc motor, the current flowing through the resistor R8 increases, the voltage of the resistor R8 increases, and the operational amplifier chip controls the pin of the control chip for controlling the motor driving module to output a low level, so as to protect the two-wire dc motor.

8. The circuit testing system of claim 7, wherein said transistor Q1 and said transistor Q4 form a totem-pole configuration of transistors for controlling said 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 below a preset threshold.