Motor short circuit recovery circuit and electronic equipment

Abstract

The utility model relates to a motor short circuit recovery circuit and electronic equipment. The circuit comprises a control module, a power supply access and a heating access, the power supply path and the heating path are connected in parallel and are electrically connected between a power supply and a motor power supply end; a heating passage; the control module controls the power supply access to be disconnected and the heating access to be connected, so that chips corresponding to short circuit of the motor are fused; the control module controls the power supply access to be conducted and the heating access to be cut off, so that the power supply supplies power to the motor power supply end through the power supply access. Based on the above scheme, the motor short circuit recovery circuit provided by the utility model can repair the motor under the condition that the motor is short-circuited, and does not need to maintain the motor through a manual disassembly mode, thereby greatly liberating manpower, and improving the efficiency of solving the problem of short circuit of the motor caused by metal chips.

Description

Technical Field

[0001] The present disclosure relates to the technical field of electronic equipment, and in particular to a motor short-circuit recovery circuit and electronic equipment. Background Art

[0002] During the operation of a brushed motor, the brushes and the pole pieces will constantly rub against each other. After a long period of operation, metal debris may remain between the pole pieces, causing a short circuit inside the motor and affecting the normal use of the motor. Manually disassembling the motor for repair not only wastes a lot of manpower, material and financial resources, but more importantly, it affects the user's use. Utility Model Content

[0003] In order to solve the above technical problems or at least partially solve the above technical problems, the present disclosure provides a motor short circuit recovery circuit and an electronic device.

[0004] In a first aspect, the present disclosure provides a motor short circuit recovery circuit, the motor short circuit recovery circuit comprising:

[0005] Control module, power supply path and heating path;

[0006] The power supply path and the heating path are connected in parallel and are both electrically connected between the power supply and the motor power supply terminal; the heating path;

[0007] The control module is used to control the power supply path to be disconnected and the heating path to be turned on, so that the debris corresponding to the motor short circuit is melted;

[0008] The control module controls the power supply path to be turned on and the heating path to be turned off, so that the power supply source supplies power to the motor power supply end through the power supply path.

[0009] Optionally, the heating path comprises a first resistor.

[0010] Optionally, the power supply path includes a first transistor;

[0011] The first electrode of the first transistor is electrically connected to the power supply; the second electrode of the first transistor is electrically connected to the motor power supply terminal; and the gate of the first transistor is electrically connected to the control module.

[0012] Optionally, the power supply path includes a first transistor, a second transistor and a second resistor;

[0013] The first pole of the first transistor is electrically connected to the power supply; the second pole of the first transistor is electrically connected to the motor power supply terminal; the gate of the first transistor is electrically connected to the first pole of the second transistor; the second pole of the second transistor is grounded; the gate of the second transistor is electrically connected to the control module; and the second resistor is electrically connected between the first pole of the first transistor and the first pole of the second transistor.

[0014] Optionally, the control module includes a control unit and a current detection unit; the current detection unit is electrically connected to the control unit; the current detection unit is used to detect the current of the power supply path;

[0015] The control unit is used for sending a first level signal to the power supply path based on the current of the power supply path being greater than a first current threshold, so as to disconnect the power supply path and connect the heating path;

[0016] The control unit is used for sending a second level signal to the power supply path based on the current of the power supply path being less than or equal to the first current threshold, so as to turn on the power supply path and turn off the heating path.

[0017] Optionally, the control module includes a control unit and a current detection unit; the current detection unit is electrically connected to the control unit; the current detection unit is used to detect the current of the power supply path;

[0018] The current of the power supply path is greater than the first current threshold, and the power supply is powered off; the control unit is used to control the power supply to power on after sending a first level signal to the power supply path, so that the power supply path is disconnected and the heating path is turned on.

[0019] Optionally, the control module further includes a timing unit; the timing unit is electrically connected to the control unit;

[0020] The current detection unit is also used to detect the current of the heating path; the timing unit is used to record the conduction time of the heating path;

[0021] After the preset conduction time is reached, the control unit controls the power supply path to be turned on and the heating path to be turned off based on the current of the heating path being less than or equal to a second current threshold.

[0022] Optionally, after reaching a preset conduction time, the control unit controls the power supply to be powered off based on that a change value of the current in the heating path is less than a difference threshold.

[0023] Optionally, the first resistor is an adjustable resistor.

[0024] In a second aspect, the present disclosure further provides an electronic device, comprising the motor short-circuit recovery circuit as described in any one of the first aspects.

[0025] Compared with the prior art solutions, the motor short circuit recovery circuit provided by the present invention has the following advantages:

[0026] In the motor circuit recovery circuit provided by the present disclosure, a power supply path and a heating path connected in parallel can be connected between the power supply source and the motor power supply end. When the motor is working normally, the power supply source provides electric energy to the motor through the power supply path, so that the motor works normally. When the motor is short-circuited, the control module can switch to the heating path to provide electric energy to the motor, so that the short-circuited position can be heated while avoiding damage, thereby melting the metal debris that causes the motor short-circuit, so that the motor recovers naturally. In summary, the motor short-circuit recovery circuit provided by the present disclosure can repair the motor when the motor is short-circuited, and there is no need to repair the motor by manual disassembly, which greatly liberates manpower and improves the efficiency of solving the problem of motor short-circuiting due to metal debris. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A schematic diagram of a motor short-circuit recovery circuit structure provided by an embodiment of the present disclosure;

[0028] Figure 2 A schematic diagram of another motor short-circuit recovery circuit structure provided in an embodiment of the present disclosure;

[0029] Figure 3 A schematic diagram of another motor short-circuit recovery circuit structure provided in an embodiment of the present disclosure;

[0030] Figure 4 A schematic diagram of another motor short-circuit recovery circuit structure provided in an embodiment of the present disclosure;

[0031] Figure 5 Another schematic diagram of a motor short-circuit recovery circuit structure is provided for an embodiment of the present disclosure. DETAILED DESCRIPTION

[0032] In order to more clearly understand the above-mentioned objectives, features and advantages of the present disclosure, the scheme of the present disclosure will be further described below. It should be noted that the embodiments of the present disclosure and the features in the embodiments can be combined with each other without conflict.

[0033] In the following description, many specific details are set forth to facilitate a full understanding of the present disclosure, but the present disclosure may also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present disclosure, rather than all of the embodiments.

[0034] For some brushed motors (such as rotor motors), friction will continue to occur between the brushes and the pole pieces during operation, and metal debris may be generated after a long period of operation. These debris may remain between two adjacent pole pieces, causing the motor to short-circuit. In related schemes, the motor is generally repaired by manual disassembly and repair, but this method is too cumbersome and wastes a lot of manpower. It also takes a long time to disassemble the motor. In addition, frequent disassembly of the motor can easily accelerate the aging of the motor, or improper assembly of the motor, etc., which will affect the use of the motor.

[0035] To this end, embodiments of the present disclosure provide a motor short-circuit recovery circuit and an electronic device.

[0036] Figure 1 A schematic diagram of a motor short circuit recovery circuit structure provided by an embodiment of the present disclosure. Figure 1 , the circuit comprises:

[0037] A control module 100 , a power supply path 200 and a heating path 300 .

[0038] The power supply path 200 and the heating path 300 are connected in parallel and are electrically connected between the power supply 101 and the motor power supply terminal 102. The heating path 300 is controlled by the control module 100 to disconnect the power supply path 200 and conduct the heating path 300, so that the debris corresponding to the motor short circuit is melted.

[0039] The control module 100 controls the power supply path 200 to be turned on and the heating path 300 to be turned off, so that the power supply source 101 supplies power to the motor power supply terminal 102 through the power supply path 200 .

[0040] For example, the control module 100 in the embodiment of the present disclosure is used to selectively control the on / off of the power supply path 200 and the heating path 300, and only one path between the power supply path 200 and the heating path 300 can be connected. Therefore, from one perspective, the control module 100 in the embodiment of the present disclosure can be considered as a functional device of a selector, for example, the control module 100 can be or at least may be a single-pole double-throw switch.

[0041] Figure 2 A schematic diagram of another motor short circuit recovery circuit structure provided by the embodiment of the present disclosure. Figure 2 , Figure 2 FIG. 1 is a circuit structure in which the control module 100 is illustrated as a single-pole double-throw switch. Figure 2 It can be understood from the illustrated structure that the single-pole double-throw switch (control module 100) can control the power supply path 200 to be disconnected and control the heating path 300 to be connected, or control the heating path 300 to be disconnected and control the power supply path 200 to be connected.

[0042] When the heating path 300 is turned on, a large current can flow through the motor and the short-circuited debris, so that the debris can generate a large amount of heat and melt the debris. In this way, since the debris that causes the motor short circuit is melted, the motor can return to a normal state.

[0043] In some embodiments, when the motor itself is short-circuited, if the motor is directly connected to the power supply 101, the motor is easily damaged, so the actual function of the heating path 300 can be used to limit the current to a certain extent, while ensuring that the current flowing through the motor is not too large to damage the motor itself, the debris can be melted. Therefore, the heating path 300 can include a first resistor 301. Figure 3 Another schematic diagram of a motor short circuit recovery circuit structure provided by an embodiment of the present disclosure. Under the premise that the heating path 300 includes the first resistor 301, the heating path 300 is turned on, and the current flowing in the path can be simply understood as i=U÷R1, where U is the output voltage of the power supply 101 and R1 is the resistance value of the first resistor 301. As for the debris, since the current flows through it, heat Q=i can be generated at the debris position. 2 ×R2×t, where R2 is the resistance value at the debris position, and t represents time. After heating for a certain period of time, the temperature at the debris position reaches a certain debris melting threshold, the debris melts, and the motor returns to normal.

[0044] Figure 4 A schematic diagram of another motor short circuit recovery circuit structure provided by an embodiment of the present disclosure. In some embodiments, the power supply path 200 includes a first transistor 401 .

[0045] The first electrode of the first transistor 401 is electrically connected to the power supply 101. The second electrode of the first transistor 401 is electrically connected to the motor power supply terminal 102. The gate of the first transistor 401 is electrically connected to the control module 100.

[0046] See also Figure 4 , Figure 4In the example of the first transistor 401 being a P-type MOS tube, the control module 100 can controllably cause the gate of the first transistor 401 to receive a high level signal or a low level signal, the first electrode of the first transistor 401 can be a source electrode, and the second electrode of the first transistor 401 can be a drain electrode. Thus, if the control module 100 causes the gate of the first transistor 401 to receive a high level signal, the first transistor 401 can be turned on, and further, when the first transistor 401 is turned on, the power supply path 200 is turned on, and the power supply path 200 short-circuits the heating path 300, which is equivalent to the heating path 300 being turned off. If the control module 100 causes the gate of the first transistor 401 to receive a low level signal, the first transistor 401 is turned off, and further, when the first transistor 401 is turned off, the power supply path 200 is turned off, and the power supply path 200 cannot short-circuit the heating path 300, and the heating path 300 is turned on.

[0047] As a specific embodiment, the control module 100 can still be a single-pole double-throw switch, and the control module 100 can selectively connect the gate of the first transistor 401 to a high-level terminal or to ground. When connected to the high-level terminal, the first transistor 401 is disconnected, and when connected to the low-level terminal, the first transistor 401 is turned on. In some embodiments, the control module 100 described herein can selectively connect the gate of the first transistor 401 to a high-level terminal or to ground, which can be done manually.

[0048] Figure 5 Another schematic diagram of a motor short circuit recovery circuit structure is provided for the embodiment of the present disclosure. In some embodiments, the power supply path 200 includes a first transistor 401 , a second transistor 501 and a second resistor 502 .

[0049] The first electrode of the first transistor 401 is electrically connected to the power supply 101. The second electrode of the first transistor 401 is electrically connected to the motor power supply terminal 102. The gate of the first transistor 401 is electrically connected to the first electrode of the second transistor 501. The second electrode of the second transistor 501 is grounded. The gate of the second transistor 501 is electrically connected to the control module 100. The second resistor 502 is electrically connected between the first electrode of the first transistor 401 and the first electrode of the second transistor 501.

[0050] See also Figure 5 , Figure 5 In the example, the first transistor 401 is a P-type MOS tube, and the second transistor 501 is an N-type MOS tube. The first electrode of the first transistor 401 can be a source electrode, and the second electrode of the first transistor 401 can be a drain electrode. The first electrode of the second transistor 501 can be a source electrode, and the second electrode of the second transistor 501 can be a drain electrode.

[0051] The control module 100 enables the gate of the second transistor 501 to receive a high level signal or a low level signal. When the motor is working normally, the control module 100 can enable the gate of the second transistor 501 to receive a high level signal, and correspondingly, the second transistor 501 is turned on, and the gate of the first transistor 401 is equivalent to being grounded, that is, the gate of the first transistor 401 is connected to a low level, the first transistor 401 is turned on, that is, the power supply path 200 is turned on, and the heating path 300 is disconnected. When the motor is short-circuited, the control module 100 can enable the gate of the second transistor 501 to receive a low level signal, and correspondingly, the second transistor 501 is disconnected, and the gate of the first transistor 401 is equivalent to being connected to the power supply 101. The second resistor 502 is used for voltage division, and the gate of the first transistor 401 is equivalent to being connected to a high level, so the first transistor 401 is disconnected, the heating path 300 is turned on, and the debris is melted. In some embodiments, the control module 100 can also be a single-pole double-throw switch, and the details can be referred to above Figure 4 The embodiments are not described in detail here.

[0052] In some embodiments, the control module 100 includes a control unit and a current detection unit. The current detection unit is electrically connected to the control unit and is used to detect the current of the power supply path 200.

[0053] The control unit is used for sending a first level signal to the power supply path 200 based on the current of the power supply path 200 being greater than the first current threshold, so as to disconnect the power supply path 200 and connect the heating path 300.

[0054] The control unit is used to send a second level signal to the power supply path 200 based on the current of the power supply path 200 being less than or equal to the first current threshold, so as to turn on the power supply path 200 and turn off the heating path 300.

[0055] Continue to refer to the above Figure 5 , illustratively, the control unit ( Figure 5 ) may include a relay, a first level terminal and a second level terminal, similar to the single-pole double-throw switch in the above embodiment, and a current detection unit ( Figure 5) can be electrically connected to the control unit. The first current threshold is a current threshold for determining whether the motor is short-circuited. When the current detection unit detects that the current of the power supply path 200 is greater than the first current threshold, the current detection unit can also output the current to the control unit, and the current greater than the first current threshold can control the relay to connect the second transistor 501 to the first level end, and the first level end can send a first level signal to the power supply path 200 to control the power supply path 200 to be disconnected and the heating path 300 to be turned on. When the current detection unit detects that the current of the power supply path 200 is less than or equal to the first current threshold, the current detection unit can also output the current to the control unit, and the current less than or equal to the first current threshold cannot control the relay to connect the gate of the second transistor 501 to the first level end, but keeps the gate of the second transistor 501 connected to the second level end, and the second level end can send a second level signal to the power supply path 200 to control the power supply path 200 to be turned on and the heating path 300 to be disconnected.

[0056] Through the above solution, automatic recovery of motor short circuit can be achieved.

[0057] In some embodiments, the control module 100 includes a control unit and a current detection unit. The current detection unit is electrically connected to the control unit and is used to detect the current of the power supply path 200.

[0058] The current of the power supply path 200 is greater than the first current threshold, and the power supply 101 is powered off; the control unit is used to control the power supply 101 to power on after sending a first level signal to the power supply path 200, so that the power supply path 200 is disconnected and the heating path 300 is turned on.

[0059] For example, after the current of the power supply path 200 is greater than the first current threshold, it indicates that the motor has been short-circuited. If the motor is still powered at this time, the motor may be damaged. Therefore, when the current of the power supply path 200 is greater than the first current threshold, the power supply 101 can be controlled to be powered off to prevent damage to the motor. When a first level signal is sent to the power supply path 200 to disconnect the power supply path 200 and the heating path 300 is turned on, the power supply 101 is continued to be controlled to supply power to achieve the purpose of fusing the debris.

[0060] Specifically, a recoverable switch may be provided in the power supply 101. After the current of the power supply path 200 is greater than the first current threshold, the recoverable switch in the power supply is automatically disconnected, and the power supply 101 is powered off. After sending the first level signal to the power supply path 200, the control unit may send a level signal to the power supply 101 to control the recoverable switch to be turned on again, that is, to control the power supply 101 to be powered on, and to disconnect the power supply path 200 and turn on the heating path 300.

[0061] In some embodiments, the control module 100 further includes a timing unit, which is electrically connected to the control unit.

[0062] The current detection unit is also used to detect the current of the heating path 300. The timing unit is used to record the conduction time of the heating path 300.

[0063] After the preset conduction time is reached, the control unit controls the power supply path 200 to be turned on and the heating path 300 to be turned off based on the current of the heating path 300 being less than or equal to the second current threshold.

[0064] Exemplarily, the timing unit may be a time controller. Specifically, the timing unit may determine the conduction time of the heating path 300, and after the conduction time reaches a certain threshold, send a specific potential signal to the control unit. After receiving the potential signal, the control unit may control the power supply path 200 to be turned on and the heating path 300 to be turned off based on the current of the heating path 300 being less than the second current threshold. The second current threshold may be the current when the motor is no longer short-circuited and the motor is electrically connected to the power supply 101 through the heating path 300.

[0065] Based on the above solution, automatic recovery of the motor circuit can be achieved.

[0066] In some embodiments, after the preset conduction time is reached, the control unit controls the power supply 101 to power off based on the change value of the current of the heating path 300 being less than the difference threshold.

[0067] Exemplarily, if the change value of the current in the heating path 300 is less than the difference threshold after the control unit receives the potential signal sent by the timing unit, it means that the motor recovery circuit provided in the embodiment of the present disclosure cannot complete the fusing of the debris by itself, and heating the motor for a long time may cause damage to the motor, so the power supply 101 can be controlled to be powered off.

[0068] In some embodiments, the first resistor 301 is an adjustable resistor.

[0069] For example, based on the adjustable first resistor 301, the current size in the circuit can be adjusted when the heating path 300 is turned on. When the current size is different, the time required to fuse the debris is also different. When the current is large, the time required to fuse the debris is shorter, and when the current is small, the time required to fuse the debris is longer. However, it should be noted that the current size should ensure that the motor itself will not be damaged.

[0070] An embodiment of the present disclosure further provides an electronic device, the electronic device comprising a motor short circuit recovery circuit such as any one of the above-mentioned motor short circuit recovery circuits.

[0071] The electronic device provided by the embodiments of the present disclosure can achieve the same or at least similar technical effects as the above-mentioned motor circuit recovery circuit, which will not be described in detail here.

[0072] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the term "comprises" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0073] So far, the technical solution of the present invention has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A motor short circuit recovery circuit, characterized in that: The circuit comprises: Control module, power supply path and heating path; The power supply path and the heating path are connected in parallel and are both electrically connected between the power supply and the motor power supply terminal; the heating path; The control module is used to control the power supply path to be disconnected and the heating path to be turned on, so that the debris corresponding to the motor short circuit is melted; The control module controls the power supply path to be turned on and the heating path to be turned off, so that the power supply source supplies power to the motor power supply end through the power supply path.

2. The circuit according to claim 1, characterized in that The heating path includes a first resistor.

3. The circuit according to claim 1, characterized in that The power supply path includes a first transistor; The first electrode of the first transistor is electrically connected to the power supply; the second electrode of the first transistor is electrically connected to the motor power supply terminal; and the gate of the first transistor is electrically connected to the control module.

4. The circuit according to claim 1, characterized in that The power supply path includes a first transistor, a second transistor and a second resistor; The first pole of the first transistor is electrically connected to the power supply; the second pole of the first transistor is electrically connected to the motor power supply terminal; the gate of the first transistor is electrically connected to the first pole of the second transistor; the second pole of the second transistor is grounded; the gate of the second transistor is electrically connected to the control module; and the second resistor is electrically connected between the first pole of the first transistor and the first pole of the second transistor.

5. The circuit according to claim 1, characterized in that The control module includes a control unit and a current detection unit; the current detection unit is electrically connected to the control unit; the current detection unit is used to detect the current of the power supply path; The control unit is used for sending a first level signal to the power supply path based on the current of the power supply path being greater than a first current threshold, so as to disconnect the power supply path and connect the heating path; The control unit is used for sending a second level signal to the power supply path based on the current of the power supply path being less than or equal to the first current threshold, so as to turn on the power supply path and turn off the heating path.

6. The circuit according to claim 1, characterized in that The control module includes a control unit and a current detection unit; the current detection unit is electrically connected to the control unit; the current detection unit is used to detect the current of the power supply path; The current of the power supply path is greater than the first current threshold, and the power supply is powered off; the control unit is used to control the power supply to power on after sending a first level signal to the power supply path, so that the power supply path is disconnected and the heating path is turned on.

7. The circuit according to claim 5 or 6, characterized in that The control module further comprises a timing unit; the timing unit is electrically connected to the control unit; The current detection unit is also used to detect the current of the heating path; the timing unit is used to record the conduction time of the heating path; After the preset conduction time is reached, the control unit controls the power supply path to be turned on and the heating path to be turned off based on the current of the heating path being less than or equal to a second current threshold.

8. The circuit according to claim 7, characterized in that After the preset conduction time is reached, the control unit controls the power supply to be powered off based on the change value of the current in the heating path being less than a difference threshold.

9. The circuit according to claim 2, characterized in that The first resistor is an adjustable resistor.

10. An electronic device, characterized in that: The electronic device comprises the motor short-circuit recovery circuit as described in any one of claims 1-9.

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