Motor driving device and motor system

Abstract

The utility model provides a motor driving device and a motor system, and relates to the technical field of motor control, the motor driving device comprises a motor, a driving circuit and a motor detection circuit, the driving circuit is a driving bridge circuit, and the driving bridge circuit comprises a first end and a second end connected with the motor; the motor detection circuit comprises a first detection unit connected with the first end and a second detection unit connected with the second end; the drive axle circuit is used for changing the connection state with the motor in response to the detection signal; and the first detection unit or the second detection unit is used for generating an indication signal in the current connection state so as to indicate the state of the motor. According to the motor driving device and the motor system provided by the utility model, the state of the motor can be indicated, so that indication can be performed through the indication signal when the motor or the driving circuit fails, the fault of the motor can be conveniently and rapidly distinguished, and the repair or maintenance efficiency can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of motor control, in particular to a motor drive device and a motor system. Background Art

[0002] In the water circulation system of new energy vehicles, electronic valves are usually installed. The vehicle collects the real-time temperature of the drive motor, battery and cockpit, analyzes their thermal requirements, and adjusts the flow to various locations through electronic valves to keep the motor, battery and cockpit in an ideal temperature environment and achieve efficient energy utilization.

[0003] Typically, an electronic valve consists of a controller and a motor. However, during operation, the motor may open circuit, or the control circuit may be broken, causing the motor to fail to operate normally. In related technologies, it is difficult to distinguish the specific type of fault, or it takes a lot of effort and cost to determine the specific type of fault, which reduces the efficiency of repair or maintenance and thus affects the performance of the entire vehicle. Utility Model Content

[0004] In view of this, an object of the present invention is to provide a motor drive device and a motor system to alleviate the above technical problems.

[0005] In a first aspect, an embodiment of the present invention provides a motor drive device, which includes: a motor, a drive circuit for driving the motor, and a motor detection circuit connected to the drive circuit; wherein the drive circuit is a drive bridge circuit, and the drive bridge circuit includes a first end and a second end connected to the motor; the motor detection circuit includes a first detection unit connected to the first end, and a second detection unit connected to the second end; the drive bridge circuit is used to respond to a detection signal and change the connection state with the motor; the first detection unit, or the second detection unit, is used to generate an indication signal in the current connection state to indicate the state of the motor.

[0006] In combination with the first aspect, an embodiment of the present invention provides a first possible implementation of the first aspect, wherein the above-mentioned driving bridge circuit includes a first bridge circuit and a second bridge circuit, the first bridge circuit and the second bridge circuit are connected in parallel and in parallel to both sides of the driving power supply; the first end is set in the first bridge circuit, and the second end is set in the second bridge circuit.

[0007] In combination with the first possible implementation of the first aspect, an embodiment of the utility model provides a second possible implementation of the first aspect, wherein the above-mentioned first bridge circuit and the second bridge circuit both include switching tubes connected in series; the first end is set at the connection point of the switching tube of the first bridge circuit; the second end is set at the connection point of the switching tube of the second bridge circuit.

[0008] In combination with the second possible implementation of the first aspect, an embodiment of the present utility model provides a third possible implementation of the first aspect, wherein the above-mentioned first detection unit includes a first comparator and a first indicator; wherein one of the input ends of the first comparator is connected to the first end, and the other input end is connected to the reference signal; the output end of the first comparator is connected to the first indicator; the first comparator is used to obtain the electrical signal of the first end when the connection state of the motor changes, compare the electrical signal with the reference signal, and output the indication signal to the first indicator, so that the first indicator indicates the state of the motor.

[0009] In combination with the third possible implementation of the first aspect, an embodiment of the present utility model provides a fourth possible implementation of the first aspect, wherein the power supply branch of the above-mentioned first comparator is provided with a first switching tube; the first switching tube is used to respond to a control signal to connect the power supply branch of the first comparator.

[0010] In combination with the third possible implementation of the first aspect, an embodiment of the present utility model provides a fifth possible implementation of the first aspect, wherein the above-mentioned first detection unit also includes a first voltage divider circuit; one of the input terminals of the first comparator is connected to the first voltage divider circuit, and is connected to the first end through the first voltage divider circuit; wherein, one end of the first voltage divider circuit is connected to the first end, and the other end is grounded; the first voltage divider circuit includes a first resistor and a second resistor connected in series, and the connection point of the first resistor and the second resistor is connected to one of the input terminals of the first comparator.

[0011] In combination with the first aspect, and the first to fifth possible implementations of the first aspect, an embodiment of the present utility model provides a sixth possible implementation of the first aspect, wherein the above-mentioned second detection unit includes a second comparator and a second indicator; wherein one of the input terminals of the second comparator is connected to the second terminal, and the other input terminal is connected to the reference signal; the output terminal of the second comparator is connected to the second indicator; the second comparator is used to obtain the electrical signal of the second terminal when the connection state of the motor changes, compare the electrical signal with the reference signal, and output the indication signal to the second indicator, so that the second indicator indicates the state of the motor.

[0012] In combination with the sixth possible implementation of the first aspect, an embodiment of the utility model provides a seventh possible implementation of the first aspect, wherein the power supply branch of the above-mentioned second comparator is provided with a second switching tube; the second switching tube is used to respond to the control signal to connect the power supply branch of the second comparator.

[0013] In combination with the sixth possible implementation of the first aspect, an embodiment of the present invention provides an eighth possible implementation of the first aspect, wherein the above-mentioned second detection unit also includes a second voltage divider circuit; one of the input terminals of the second comparator is connected to the second voltage divider circuit, and is connected to the second end through the second voltage divider circuit; wherein, one end of the second voltage divider circuit is connected to the second end, and the other end is grounded; the second voltage divider circuit includes a third resistor and a fourth resistor connected in series, and the connection point of the third resistor and the fourth resistor is connected to one of the input terminals of the second comparator.

[0014] In a second aspect, an embodiment of the present invention further provides a motor system, wherein the motor system is configured with the motor drive device described in the first aspect.

[0015] The embodiments of the present invention bring the following beneficial effects:

[0016] The motor drive device and motor system provided by the embodiments of the present invention include a motor, a drive circuit for driving the motor, and a motor detection circuit connected to the drive circuit in the motor drive device; the drive circuit is a drive bridge circuit, including a first end and a second end connected to the motor; the motor detection circuit includes a first detection unit connected to the first end, and a second detection unit connected to the second end; the drive bridge circuit can respond to a detection signal to change the connection state with the motor, and the first detection unit or the second detection unit can generate an indication signal in the current connection state to indicate the state of the motor, so that when a fault occurs in the motor or the drive circuit, it can be indicated by the indication signal, which not only helps to conveniently and quickly distinguish motor faults, but also improves repair or maintenance efficiency.

[0017] Other features and advantages of the present invention will be described in the following description, and in part will become apparent from the description, or understood by practicing the present invention. The objectives and other advantages of the present invention are realized and obtained by the structures particularly pointed out in the description, claims and drawings.

[0018] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific implementation methods or the description of the prior art. Obviously, the drawings described below are some implementation methods of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 A schematic structural diagram of a motor drive device provided in an embodiment of the present utility model;

[0021] Figure 2 A circuit diagram of a motor drive device provided by an embodiment of the present utility model;

[0022] Figure 3 A motor detection schematic diagram provided by an embodiment of the present utility model;

[0023] Figure 4 Another motor detection schematic diagram provided by an embodiment of the present utility model;

[0024] Figure 5 Another motor detection schematic diagram provided by an embodiment of the present utility model;

[0025] Figure 6 Another motor detection schematic diagram provided by an embodiment of the present utility model. DETAILED DESCRIPTION

[0026] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work shall fall within the scope of protection of the present invention.

[0027] Typically, electronic valves are installed in the water circulation system of new energy vehicles, which can adjust the flow to various locations so that the motor, battery, cockpit and other locations of the new energy vehicle are in an ideal temperature environment, thereby achieving efficient energy utilization.

[0028] Typically, an electronic valve consists of a controller and a motor. However, during operation, the motor may open or the control circuit may break. This often requires considerable effort and expense to determine the cause of the fault, reducing repair or maintenance efficiency.

[0029] Based on this, the embodiments of the present invention provide a motor drive device and a motor system that can effectively alleviate the above technical problems.

[0030] To facilitate understanding of this embodiment, a motor drive device disclosed in an embodiment of the present utility model is first introduced in detail.

[0031] In a possible implementation, an embodiment of the present invention provides a motor driving device for driving a motor of an electronic valve.

[0032] In practice, electronic valves are typically installed in the water circulation system of new energy vehicles. These valves typically include a controller, a motor, and a valve body driven by the motor. Furthermore, the water circulation system also includes liquid pipelines, mechanical stops, and other structures. The valve body is typically installed in the pipeline, and the motor drives the valve body to change its position, thereby controlling the flow direction of the liquid in the pipeline. Therefore, the electronic valve can be used to regulate the flow of liquid to various locations in the entire water circulation system.

[0033] The motor driving device in the embodiment of the present invention is used to drive the motor in the electronic valve. Figure 1 The structure diagram of a motor driving device shown in FIG. 1 includes a motor 10 , a driving circuit 20 for driving the motor 10 , and a motor detection circuit 30 connected to the driving circuit.

[0034] Among them, in the embodiment of the present invention, the connection between the drive circuit and the motor detection circuit is an electrical connection. Specifically, the drive circuit 20 is a drive bridge circuit, and the drive bridge circuit includes a first end and a second end connected to the motor; the motor detection circuit 30 includes a first detection unit 301 connected to the first end, and a second detection unit 302 connected to the second end.

[0035] In a specific implementation, the above-mentioned drive bridge circuit is used to respond to the detection signal and change the connection state with the motor; the first detection unit, or the second detection unit, is used to generate an indication signal under the current connection state of the motor to indicate the state of the motor.

[0036] In actual use, the upper motor detection circuit can operate when the motor is in a maintenance condition. That is, under normal operating conditions, the drive circuit operates according to the control logic of the controller to drive the motor to rotate. The motor can be inspected or maintained according to a pre-configured maintenance cycle. At this time, the controller can control the first detection unit and the second detection unit of the motor detection circuit to generate an indication signal when the connection status of the motor changes, thereby indicating the status of the motor. In addition, the above-mentioned motor detection circuit can also operate when the entire motor system fails to determine the specific fault, such as whether it is a fault in the motor itself or a fault in a component in the drive circuit, etc., to improve maintenance efficiency.

[0037] Therefore, the motor drive device provided by the embodiment of the present invention includes a motor, a drive circuit for driving the motor, and a motor detection circuit connected to the drive circuit; the drive circuit is a drive bridge circuit, including a first end and a second end connected to the motor; the motor detection circuit includes a first detection unit connected to the first end, and a second detection unit connected to the second end; the drive bridge circuit can respond to the detection signal to change the connection state with the motor, and the first detection unit or the second detection unit can generate an indication signal in the current connection state to indicate the state of the motor, so that when a fault occurs in the motor or the drive circuit, it can be indicated by the indication signal, which not only helps to conveniently and quickly distinguish the fault of the motor, but also improves the repair or maintenance efficiency.

[0038] Furthermore, the motor in the embodiment of the present invention may be a stepper motor, and therefore, the first end and the second end of the drive bridge circuit may be directly connected to the A phase and the B phase of the motor.

[0039] Furthermore, for ease of understanding, Figure 1 On the basis of Figure 2 A circuit diagram of a motor drive device is shown in FIG. Figure 2 The figure further shows a drive power supply DC for the motor and a sampling resistor R provided at the ground terminal of the drive bridge circuit. Furthermore, the drive bridge circuit includes a first bridge circuit and a second bridge circuit, wherein the first bridge circuit and the second bridge circuit are connected in parallel and in parallel to both sides of the drive power supply. The first end is provided in the first bridge circuit, and the second end is provided in the second bridge circuit.

[0040] in, Figure 2 A represents the first end, corresponding to the A phase of the motor, and B represents the second end, corresponding to the B phase of the motor.

[0041] further, Figure 2 In the embodiment, the first bridge circuit and the second bridge circuit both include switching tubes connected in series; the first end is arranged at the connection point of the switching tubes of the first bridge circuit; and the second end is arranged at the connection point of the switching tubes of the second bridge circuit.

[0042] That is, based on Figure 2 In the schematic diagram shown, the switch tubes Q1 and Q2 are the switch tubes of the first bridge circuit, and the switch tubes Q3 and Q4 are the switch tubes of the second bridge circuit.

[0043] In specific implementation, the above-mentioned switch tube can be a MOS tube, whose source is connected to the controller and is turned on or off under the control of the controller. Its gate and drain can refer to Figure 2The connection mode shown is used to form the driving bridge circuit of the embodiment of the present utility model. In actual use, the type and parameters of the above-mentioned switch tubes can also be set according to actual use conditions, and the embodiment of the present utility model does not limit this.

[0044] further, Figure 2 The circuit diagram of the motor detection circuit is also shown in FIG. Figure 2 As shown, the first detection unit includes a first comparator C1 and a first indicator; wherein one of the input terminals of the first comparator is connected to the first terminal, that is, Figure 2 A in the figure, the other input end is connected to the reference signal; the output end of the first comparator is connected to the first indicator; the first comparator is used to obtain the electrical signal of the first end when the connection state of the motor changes, compare the electrical signal of the first end with the reference signal, and output an indication signal to the first indicator, so that the first indicator indicates the state of the motor.

[0045] In actual use, the reference signal can be set according to the actual driving conditions of the motor. In the embodiment of the present utility model, the reference signal is directly set to the form of a voltage signal, that is, Figure 2 The Vref in the example is Vref=2.5V, etc.

[0046] Furthermore, the power supply branch of the first comparator C1 is provided with a first switch tube; Figure 2 Q6 in the first switch is used to respond to the control signal to turn on the power supply branch of the first comparator.

[0047] In actual use, the first switch tube can also be in the form of a MOS tube, and its source can be connected to the controller. When the motor detection circuit is started, the first switch tube can be controlled by the controller to turn on to connect the power supply branch of the first comparator, power the first comparator, and then enable the first comparator to start working.

[0048] in, Figure 2 In the figure, the first switching tube is set in the negative power supply branch of the first comparator as an example for explanation. In actual use, the first switching tube can also be set in the positive power supply branch of the first comparator, that is, the power supply branch of VCC1. The specific setting can be made according to the actual use situation, and the embodiment of the present utility model is not limited to this.

[0049] Furthermore, in order to prevent the electrical signal at the first end from impacting the first comparator, in an embodiment of the present invention, the first detection unit further includes a first voltage divider circuit; one of the input ends of the first comparator is connected to the first voltage divider circuit, and is connected to the first end through the first voltage divider circuit; wherein one end of the first voltage divider circuit is connected to the first end, and the other end is grounded. Specifically, Figure 2As shown, the first voltage divider circuit includes a first resistor R1 and a second resistor R2 connected in series, and the connection point of the first resistor R1 and the second resistor R2 is connected to one of the input terminals of the first comparator, such as Figure 2 The negative input terminal is shown in .

[0050] Furthermore, the above Figure 2 Also shown is a first indicator, namely Figure 2 It should be understood that the LED1 in the figure can be a single LED lamp bead or a string of LED lamp beads with different brightness or different colors, which can indicate the status of different motors. The specific setting method of the first indicator can be set according to actual usage, and the embodiment of the utility model does not limit this.

[0051] Similarly, the circuit structure is similar to that of the first detection unit. Figure 2 Also shown is a circuit diagram of the second detection unit, as shown in FIG. Figure 2 As shown, the second detection unit includes a second comparator C2 and a second indicator LED2.

[0052] Among them, one of the input terminals of the second comparator C2 is connected to the second terminal, that is, Figure 2 The other input terminal of the second comparator C2 is connected to the reference signal; the output terminal of the second comparator C2 is connected to the second indicator LED2.

[0053] The second comparator is used to obtain the electrical signal of the second end when the connection state of the motor changes, compare the electrical signal of the second end with the reference signal, and output an indication signal to the second indicator so that the second indicator indicates the state of the motor.

[0054] In actual use, the second end may use a reference signal that is consistent with that of the first end, such as a reference signal of Vref=2.5V.

[0055] At the same time, the power supply branch of the second comparator is provided with a second switch tube; the second switch tube is used to respond to the control signal to connect the power supply branch of the second comparator.

[0056] Specifically, if Figure 2 The second switch tube Q5 in the circuit is similar to the first switch tube Q6 and can be in the form of a MOS tube. Its source can be connected to the controller. When the motor detection circuit is started, the controller can control the second switch tube to turn on, so as to connect the power supply branch of the second comparator, supply power to the second comparator, and thus enable the second comparator to start working.

[0057] Furthermore, a second voltage divider circuit is further included on the second detection unit side; one of the input terminals of the second comparator is connected to the second voltage divider circuit, and is connected to the second terminal through the second voltage divider circuit; wherein one terminal of the second voltage divider circuit is connected to the second terminal, and the other terminal is grounded; and Figure 2 As shown, the second voltage divider circuit includes a third resistor R3 and a fourth resistor R4 connected in series, and the connection point of the third resistor R3 and the fourth resistor R4 is connected to one of the input terminals of the second comparator, such as Figure 2 The negative input terminal is shown in .

[0058] Furthermore, based on the above Figure 2 As shown in the circuit diagram of the motor drive device, the motor detection circuit may include the following processes when detecting the state of the motor:

[0059] (1) Q1 and Q5 are turned on, Q2, Q3, Q4, and Q6 are turned off;

[0060] At this time, corresponding Figure 3 The motor detection schematic diagram shown, that is, Figure 3 In the path shown by the arrow, the second comparator works.

[0061] If LED2 is lit at this time, there is an open circuit in the circuit corresponding to the arrow.

[0062] This is because, under normal circumstances, if the circuit indicated by the arrow is operating normally, the negative input of the second comparator C2 is at a high level and higher than the reference signal. At this point, the second comparator C2 outputs a low level, and LED2 does not light up. However, if LED2 lights up, it means that the second comparator C2 outputs a high level, while the negative input of the second comparator C2 is at a low level and lower than the reference signal. This indicates that the DC power supply to the motor is not being transmitted to the negative input of the second comparator C2, causing the negative input of the second comparator C2 to be at a low level. Therefore, there is an open circuit in the circuit indicated by the arrow. However, it is impossible to determine whether Q1 is open or the motor is open.

[0063] (2) Q1 and Q6 are turned on, while Q2, Q3, Q4, and Q5 are turned off;

[0064] At this time, corresponding Figure 4 The motor detection schematic diagram shown, that is, Figure 4 In the path shown by the arrow, the first comparator works.

[0065] If LED1 is lit at this time, it means that the open circuit in (1) above occurs in the switch tube Q1; if LED1 is not lit, it means that the open circuit occurs in the motor.

[0066] This is because, even if an open circuit has been determined in (1), it is not possible to determine whether the open circuit occurs on the motor side or on the switch tube Q1.

[0067] At this time, when the driving bridge circuit responds to the detection signal and the first switch tube responds to the control signal, Q1 and Q6 are turned on and Q2, Q3, Q4, and Q5 are turned off. If LED1 is lit, it means that the first comparator outputs a high level, and its negative input terminal is a low level, which is lower than the reference signal. Normally, when Q1 is turned on, the negative input terminal of the first comparator should be a high level, that is, the DC output voltage is directly input to the negative input terminal of the first comparator through the first resistor R1 and the second resistor R2 of the first voltage divider circuit, and is higher than the reference signal, causing the first comparator to output a low level, so that LED1 is not lit. Therefore, when LED1 is lit, it means that the voltage signal is not input to the negative input terminal of the first comparator. At this time, the circuit shown by the arrow only has the switch tube Q1, that is, it is determined that the switch tube Q1 is open.

[0068] If LED1 is not lit at this time, it means that the switch tube Q1 is normally turned on. If the switch tube Q1 is not open, it means that the open circuit determined in (1) is on the motor side.

[0069] Therefore, based on the above situations (1) and (2), it can be determined whether the motor or the switch tube Q1 is open-circuited on the A-phase side.

[0070] Furthermore, for phase B, further detection can also be performed to determine whether the fault is caused by the motor or the switch tube, that is, the following process is included.

[0071] (3) Q3, Q6 are turned on, Q1, Q2, Q4, Q5 are turned off;

[0072] At this time, corresponding Figure 5 The motor detection schematic diagram shown, that is, Figure 5 In the path shown by the arrow, the first comparator works.

[0073] If LED1 is lit at this time, there is an open circuit in the circuit corresponding to the arrow.

[0074] This is because, under normal circumstances, if the circuit corresponding to the arrow is normal, the negative input terminal of the first comparator C1 is high level and higher than the reference signal. At this time, the first comparator C1 outputs a low level and LED1 is not lit.

[0075] If LED1 is lit, it indicates that the first comparator C1 outputs a high level, while the negative input of the first comparator C1 is at a low level, lower than the reference signal. This indicates that the DC power supply to the motor is not being transmitted to the negative input of the first comparator C1, resulting in a low level at the negative input of the first comparator C1. Therefore, there is an open circuit in the circuit corresponding to the arrow. However, it is impossible to determine whether Q3 is open or the motor is open.

[0076] (4) Q3, Q5 are turned on, Q1, Q2, Q4, Q6 are turned off;

[0077] At this time, corresponding Figure 6 The motor detection schematic diagram shown, that is, Figure 6 In the path shown by the arrow, the second comparator works.

[0078] If LED2 is lit at this time, it means that the open circuit in (3) above occurs in the switch tube Q3; if LED2 is not lit, it means that the open circuit occurs in the motor.

[0079] This is because, even if an open circuit has been determined in (3), it is not possible to determine whether the open circuit occurs on the motor side or on the switch tube Q3.

[0080] At this time, when the driver bridge circuit responds to the detection signal and the second switch tube responds to the control signal, turning on Q3 and Q5 and turning off Q1, Q2, Q4, and Q6, if LED2 is illuminated, it means that the second comparator outputs a high level and its negative input terminal is a low level, lower than the reference signal. Normally, when Q3 is on, the negative input terminal of the second comparator should be high. That is, the DC output voltage is directly input to the negative input terminal of the second comparator through the third resistor R3 and the fourth resistor R4 of the second voltage divider circuit and is higher than the reference signal, causing the second comparator to output a low level, so that LED2 is not illuminated. Therefore, when LED2 is illuminated, it means that the DC output voltage is not input to the negative input terminal of the second comparator. At this time, the circuit shown by the arrow only includes switch tube Q3, that is, it is determined that switch tube Q3 is open.

[0081] If LED2 is not lit at this time, it means that the switch tube Q3 is normally turned on. If the switch tube Q3 is not open, it means that the open circuit determined in (3) is on the motor side.

[0082] Therefore, based on the above situations (3) and (4), it can be determined whether the motor or the switch tube Q3 is open-circuited on the B-phase side.

[0083] In summary, the motor drive device provided in the embodiment of the present invention can perform further detection when a motor fails to determine whether it is an open circuit fault of the motor itself or a fault of the switch tube in the drive circuit, thereby improving the efficiency of motor repair or maintenance.

[0084] Furthermore, based on the above embodiment, an embodiment of the present utility model also provides a motor system, which is equipped with the above motor drive device.

[0085] In specific implementation, the above-mentioned motor system can be used in the water circulation system of new energy vehicles to drive the motor in the electronic valve and adjust the flow to various positions through the electronic valve, so that the motor, battery, cockpit and other positions are in an ideal temperature environment, thereby realizing efficient energy utilization.

[0086] The motor system provided in the embodiment of the present invention has the same technical features as the motor drive device provided in the above embodiment, and can therefore solve the same technical problems and achieve the same technical effects.

[0087] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working process of the motor system described above can refer to the corresponding process in the aforementioned embodiment and will not be repeated here.

[0088] In addition, in the description of the embodiments of the present invention, unless otherwise specified or limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integral connection; they can refer to mechanical connection or electrical connection; they can refer to direct connection or indirect connection through an intermediate medium; and they can refer to internal communication between two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0089] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0090] Finally, it should be noted that the above embodiments are only specific implementation methods of the present invention, which are used to illustrate the technical solutions of the present invention, rather than to limit them. The protection scope of the present invention is not limited thereto. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that any person skilled in the art can modify or easily conceive of changes to the technical solutions described in the above embodiments within the technical scope disclosed by the present invention, or replace some of the technical features therein with equivalents. Such modifications, changes, or replacements do not deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A motor drive device, characterized in that: The motor driving device includes: a motor, a driving circuit for driving the motor, and a motor detection circuit connected to the driving circuit; Wherein, the driving circuit is a driving bridge circuit, and the driving bridge circuit includes a first end and a second end connected to the motor; The motor detection circuit includes a first detection unit connected to the first end, and a second detection unit connected to the second end; The driving bridge circuit is used to respond to the detection signal and change the connection state with the motor; The first detection unit, or the second detection unit, is configured to generate an indication signal in the current connection state to indicate the state of the motor.

2. The motor drive device according to claim 1, characterized in that: The driving bridge circuit includes a first bridge circuit and a second bridge circuit, wherein the first bridge circuit and the second bridge circuit are connected in parallel and are connected in parallel to both sides of the driving power supply; The first end is provided in the first bridge circuit, and the second end is provided in the second bridge circuit.

3. The motor drive device according to claim 2, characterized in that: The first bridge circuit and the second bridge circuit both include switching tubes connected in series; The first end is provided at a connection point of the switch tube of the first bridge circuit; The second end is arranged at a connection point of the switching tubes of the second bridge circuit.

4. The motor drive device according to claim 3, characterized in that: The first detection unit includes a first comparator and a first indicator; Wherein, one input terminal of the first comparator is connected to the first terminal, and the other input terminal is connected to the reference signal; the output terminal of the first comparator is connected to the first indicator; The first comparator is used to obtain the electrical signal of the first end when the connection state of the motor changes, compare the electrical signal with the reference signal, and output the indication signal to the first indicator so that the first indicator indicates the state of the motor.

5. The motor drive device according to claim 4, characterized in that: The power supply branch of the first comparator is provided with a first switching tube; The first switch tube is used to respond to a control signal to switch on a power supply branch of the first comparator.

6. The motor drive device according to claim 4, characterized in that: The first detection unit further includes a first voltage divider circuit; One of the input terminals of the first comparator is connected to the first voltage divider circuit, and is connected to the first terminal through the first voltage divider circuit; Wherein, one end of the first voltage divider circuit is connected to the first end, and the other end is grounded; The first voltage divider circuit includes a first resistor and a second resistor connected in series, and a connection point between the first resistor and the second resistor is connected to one of the input terminals of the first comparator.

7. The motor drive device according to any one of claims 1 to 6, characterized in that: The second detection unit includes a second comparator and a second indicator; wherein one input terminal of the second comparator is connected to the second terminal, and the other input terminal is connected to the reference signal; and an output terminal of the second comparator is connected to the second indicator; The second comparator is used to obtain the electrical signal of the second end when the connection state of the motor changes, compare the electrical signal with the reference signal, and output the indication signal to the second indicator so that the second indicator indicates the state of the motor.

8. The motor drive device according to claim 7, characterized in that: The power supply branch of the second comparator is provided with a second switching tube; The second switch tube is used to respond to a control signal to switch on a power supply branch of the second comparator.

9. The motor drive device according to claim 7, characterized in that: The second detection unit further includes a second voltage divider circuit; One of the input terminals of the second comparator is connected to the second voltage divider circuit, and is connected to the second terminal through the second voltage divider circuit; Wherein, one end of the second voltage divider circuit is connected to the second end, and the other end is grounded; The second voltage divider circuit includes a third resistor and a fourth resistor connected in series, and a connection point between the third resistor and the fourth resistor is connected to one of the input terminals of the second comparator.

10. A motor system, characterized in that: The motor system is provided with the motor drive device according to any one of claims 1 to 9.

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