Fault detection circuit and fault detector for Hall brushless motor

Abstract

The utility model provides a fault detection circuit and a fault detector used for a Hall brushless motor, the fault detection circuit provided by the utility model is used for being connected with a Hall sensor in the Hall brushless motor, and the fault detection circuit comprises a power supply module and a state indication module, wherein a first end of the power supply module is connected with a first end of the state indication module, and the first end of the power supply module is also used for being connected with a power supply input end of the Hall sensor; a second end of the state indication module is used for being connected with a signal output end of the Hall sensor and displaying an output signal of the Hall sensor; the fault detection circuit can be connected with the Hall sensor in the Hall brushless motor to carry out fault detection on the Hall brushless motor, and the detection efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of circuits, in particular to a fault detection circuit and a fault detector for a Hall brushless motor. Background Art

[0002] A Hall brushless motor uses Hall sensors to sense the position of the rotor. According to the rotor position, an electronic commutation device inputs current to different windings, thereby realizing the rotation of the motor. Its characteristics such as high efficiency, high power density, high reliability, and high speed range enable the Hall brushless motor to have excellent performance in various application scenarios.

[0003] In related technologies, when a Hall brushless motor fails and cannot work, the fault is usually eliminated by replacing components, such as replacing the rotor, stator, switch, control board, etc. This way of troubleshooting requires a large amount of time and labor costs, and the efficiency is low. Summary of the Utility Model

[0004] Based on this, the utility model provides a fault detection circuit and a fault detector for a Hall brushless motor, which can realize the rapid detection of the fault location of the Hall brushless motor and improve the detection efficiency.

[0005] On the one hand, the utility model provides a fault detection circuit for a Hall brushless motor, which is used to connect with the Hall sensor in the Hall brushless motor. The fault detection circuit for the Hall brushless motor and the fault detector include a power supply module and a status indication module; wherein:

[0006] The first end of the power supply module is connected to the first end of the status indication module, and the first end of the power supply module is also used to connect to the power input end of the Hall sensor;

[0007] The second end of the status indication module is used to connect to the signal output end of the Hall sensor to display the output signal of the Hall sensor.

[0008] Further, in some embodiments, the fault detection circuit further includes an interface module, which is connected to the power supply module and the status indication module and is used to connect to the Hall sensor.

[0009] Further, in some embodiments, the power supply module includes a voltage source, a protection circuit, a power supply indication circuit, and a voltage stabilization circuit; wherein:

[0010] The positive pole of the voltage source is connected to the first end of the protection circuit, and the negative pole of the voltage source is grounded;

[0011] The second end of the protection circuit is connected to the first end of the voltage stabilizing circuit, the first end of the power indicator circuit, and the first end of the status indicator module, and the second end of the protection circuit is also used to be connected to the power input terminal of the Hall sensor;

[0012] The second end of the voltage stabilizing circuit and the second end of the power indicator circuit are grounded.

[0013] Further, in some embodiments, the protection circuit includes a fuse resistor; wherein:

[0014] The first end of the fuse resistor is connected to the positive pole of the voltage source, and the second end of the fuse resistor is connected to the first end of the voltage stabilizing circuit and the first end of the power indicator circuit.

[0015] Further, in some embodiments, the voltage stabilizing circuit includes a first capacitor and a second capacitor; wherein:

[0016] The first end of the first capacitor, the first end of the second capacitor, the second end of the protection circuit, and the first end of the power indicator circuit are connected, and the second end of the first capacitor and the second end of the second capacitor are grounded.

[0017] Further, in some embodiments, the power indicator circuit includes a first resistor and a first light-emitting diode; wherein:

[0018] The first end of the first resistor is connected to the first end of the voltage stabilizing circuit and the second end of the protection circuit, the second end of the first resistor is connected to the positive pole of the first light-emitting diode, and the negative pole of the first light-emitting diode is grounded.

[0019] Further, in some embodiments, the status indicator module includes a first indicator sub-module, a second indicator sub-module, and a third indicator sub-module, which are used to be associated and connected with the first Hall sensor, the second Hall sensor, and the third Hall sensor included in the Hall sensor respectively; wherein:

[0020] The first end of the first indicator sub-module, the first end of the second indicator sub-module, and the first end of the third indicator sub-module are all connected to the first end of the power supply module, and the first end of the power supply module is also used to be connected to the power input terminals of the first Hall sensor, the second Hall sensor, and the third Hall sensor;

[0021] The second end of the first indicator sub-module is connected to the signal output terminal of the first Hall sensor;

[0022] The second end of the second indicator sub-module is connected to the signal output terminal of the second Hall sensor;

[0023] The second end of the third indicating sub-module is connected to the signal output end of the third Hall sensor.

[0024] Further, in some embodiments, the first indicating sub-module includes a second resistor, a third resistor, a fourth resistor, a first switching triode, and a second light-emitting diode; wherein:

[0025] The collector of the first switching triode is connected to the first end of the second resistor and the first end of the power supply module;

[0026] The base of the first switching triode is connected to the first end of the third resistor, and the second end of the third resistor, the second end of the second resistor, and the signal output end of the Hall sensor are connected;

[0027] The emitter of the first switching triode is connected to the first end of the fourth resistor, the second end of the fourth resistor is connected to the positive electrode of the second light-emitting diode, and the negative electrode of the second light-emitting diode is grounded.

[0028] Further, in some embodiments, the second indicating sub-module includes a fifth resistor, a sixth resistor, a seventh resistor, a second switching triode, and a third light-emitting diode; wherein:

[0029] The collector of the second switching triode is connected to the first end of the fifth resistor and the first end of the power supply module;

[0030] The base of the second switching triode is connected to the first end of the sixth resistor, and the second end of the sixth resistor, the second end of the fifth resistor, and the signal output end of the Hall sensor are connected;

[0031] The emitter of the second switching triode is connected to the first end of the seventh resistor, the second end of the fourth resistor is connected to the positive electrode of the third light-emitting diode, and the negative electrode of the third light-emitting diode is grounded.

[0032] Further, in some embodiments, the third indicating sub-module includes an eighth resistor, a ninth resistor, a tenth resistor, a third switching triode, and a fourth light-emitting diode; wherein:

[0033] The collector of the third switching triode is connected to the first end of the eighth resistor and the first end of the power supply module;

[0034] The base of the third switching triode is connected to the first end of the ninth resistor, and the second end of the ninth resistor, the second end of the eighth resistor, and the signal output end of the Hall sensor are connected;

[0035] The emitter of the third switching triode is connected to the first end of the tenth resistor, the second end of the tenth resistor is connected to the positive electrode of the fourth light-emitting diode, and the negative electrode of the fourth light-emitting diode is connected to the ground.

[0036] On the other hand, the present invention provides a fault detector, including a housing and the above-mentioned fault detection circuit, and the fault detection circuit is arranged in the housing.

[0037] The fault detection circuit provided by the present invention can, when a Hall brushless motor fails, be connected to a Hall sensor in the Hall brushless motor, and the power supply module supplies power to the Hall sensor, obtains the Hall signal output by the Hall sensor during the operation of the Hall brushless motor, and uses the status indication module to display the Hall signal output by the Hall sensor. Furthermore, the fault location of the Hall brushless motor can be determined according to the display result. By using the fault detection circuit provided by the present invention, the fault location of the Hall brushless motor can be quickly detected, and the detection efficiency can be improved.

[0038] It should be understood that the content described in the utility model content section is not intended to limit the key or important features of the embodiments of the present invention, nor is it used to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a schematic structural diagram of a fault detection circuit provided by an embodiment of the present specification;

[0040] Figure 2 It is a schematic structural diagram of a fault detection circuit provided by an embodiment of the present specification;

[0041] Figure 3 It is a schematic structural diagram of a fault detection circuit provided by an embodiment of the present specification;

[0042] Figure 4 It is a schematic structural diagram of a fault detection circuit provided by an embodiment of the present specification;

[0043] Figure 5 It is a schematic structural diagram of a fault detection circuit provided by an embodiment of the present specification;

[0044] Figure 6 It is a schematic structural diagram of a fault detection circuit provided by an embodiment of the present specification;

[0045] Figure 7 It is a schematic structural diagram of a fault detection circuit provided by an embodiment of the present specification;

[0046] Figure 8Schematic diagram of a fault detection circuit provided by an embodiment of this specification;

[0047] Figure 9 Schematic diagram of a fault detection circuit provided by an embodiment of this specification. Specific implementation manners

[0048] To make the objectives, technical solutions, and advantages of this specification clearer, the technical solutions of this specification will be clearly and completely described below in conjunction with specific embodiments of this specification and the corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this specification, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in this specification without creative efforts shall fall within the scope of protection of this specification.

[0049] In the description of one or more embodiments of this specification, the term "including" and its similar terms should be understood as open inclusion, that is, "including but not limited to". The term "based on" should be understood as "at least partially based on". The term "one embodiment" or "the embodiment" should be understood as "at least one embodiment". Terms such as "first", "second", etc. may refer to different or the same objects. There may also be other explicit and implicit definitions below.

[0050] It should be noted that in one or more embodiments of this specification, the fault detection circuit is used to be connected to the Hall sensor in the brushless DC motor, and can display the output signal during the operation of the Hall sensor. Among them, the brushless DC motor detects the relative position of the stator and the rotor through the Hall sensor provided therein, and controls the commutation of the armature current according to the relative position of the stator and the rotor to maintain the normal operation of the motor.

[0051] Please refer to Figure 1 , which is a schematic diagram of a fault detection circuit provided by an embodiment of this specification. The fault detection circuit 1 is used to be connected to the Hall sensor 21 in the brushless DC motor 2. The fault detection circuit 1 includes a power supply module 11 and a status indication module 12; wherein:

[0052] The first end of the power supply module 11 is connected to the first end of the status indication module 12. The first end of the power supply module 11 is also used to be connected to the power input terminal of the Hall sensor 21; the second end of the status indication module 12 is used to be connected to the signal output terminal of the Hall sensor 21 and is used to display the output signal of the Hall sensor 21.

[0053] The power supply module 11 is used to supply power to the status indication module 12 and the Hall sensor 21 in the Hall brushless motor, so that the status indication module and the Hall sensor can operate normally. The status indication module 12 is used to receive the output signal of the Hall sensor and display the output signal.

[0054] Specifically, after connecting the fault detection circuit to the Hall sensor in the Hall brushless motor, the power supply module provides electrical energy for the Hall sensor. The Hall sensor works and outputs a signal. The output signal of the Hall sensor is transmitted to the status indication module, and the status indication module can display the output signal.

[0055] For a faulty Hall brushless motor, use this fault detection circuit to connect to the Hall sensor in the Hall brushless motor. The power supply module provides the working voltage for the Hall sensor. Rotate the Hall brushless motor. The Hall sensor outputs a signal. The output signal of the Hall sensor is transmitted to the status indication module, and the status indication module can display the output signal. Then, the maintenance personnel can determine the fault location of the Hall brushless motor based on the display result. For example, Hall sensor fault, rotor fault or stator fault, etc. Using this fault detection circuit can achieve rapid detection of the fault location of the Hall brushless motor and improve the fault detection efficiency.

[0056] Furthermore, the power supply module 11 can obtain a voltage source from the outside through a power interface or has a built-in voltage source inside the power supply module 11.

[0057] Optionally, when the power supply module obtains a stable voltage source from the outside through the power interface, the power interface can be a USB power interface or other forms of power interfaces.

[0058] Optionally, when the power supply module has a built-in voltage source, its built-in voltage source can be a 5V lithium battery or other forms of energy storage elements that can stably release electrical energy.

[0059] In one embodiment, as Figure 2 shown, the fault detection circuit further includes an interface module 13. The interface module 13 is connected to the power supply module 11 and the status indication module 12, and the interface module 13 is also used to connect to the Hall sensor 21.

[0060] The interface module 13 is a terminal element used to achieve a quick connection between the fault detection circuit and the Hall sensor in the Hall brushless motor. There is a connection interface for the Hall sensor on the Hall brushless motor side. Using the interface module 13, a quick connection between the fault detection circuit and the Hall sensor in the Hall brushless motor can be achieved by plugging.

[0061] Furthermore, as Figure 3As shown, the power supply module 11 includes a voltage source VCC, a protection circuit 111, a power indicator circuit 112, and a voltage regulator circuit 113; among which:

[0062] The positive electrode of the voltage source is connected to the first end of the protection circuit, and the negative electrode of the voltage source is connected to the ground.

[0063] The second end of the protection circuit is connected to the first end of the voltage regulator circuit, the first end of the power indicator circuit, and the first end of the status indicator module, and the second end of the protection circuit is also used to connect to the power input terminal of the Hall sensor.

[0064] The second end of the voltage regulator circuit and the second end of the power indicator circuit are connected to the ground.

[0065] Among them, the voltage source is used to provide the working voltage for the status indicator module and the Hall sensor; the protection circuit is used to provide overload protection for the fault detection circuit; the power indicator circuit is used to indicate the power-on state, and the regulated voltage is used to stabilize the voltage.

[0066] Optionally, the voltage source can be provided through a USB interface. Connect to an external power supply through the USB interface to obtain a voltage source for providing the working voltage of the status indicator module and the Hall sensor.

[0067] Optionally, the protection circuit can be a fuse, a fuse wire, an electronic circuit breaker, or a relay.

[0068] Optionally, the power indicator circuit can be a circuit structure including an indicator light element. When the power is turned on, the indicator light is on, and when the power connection is disconnected, the indicator light is off.

[0069] Further, as Figure 4 shown, the protection circuit 111 includes a fuse resistor RF; among which:

[0070] The first end of the fuse resistor is connected to the positive electrode of the voltage source, and the second end of the fuse resistor is connected to the first end of the voltage regulator circuit and the first end of the power indicator circuit.

[0071] When an overload, short circuit, or fault occurs in the circuit or device, an excessive current will pass through the fuse resistor, causing the fuse resistor to heat up and eventually blow, thereby isolating the faulty circuit. It can prevent the components in the fault detection circuit and the Hall sensor from being damaged by overcurrent, improving the reliability and safety of the device.

[0072] Further, as Figure 5 shown, the voltage regulator circuit 113 includes a first capacitor C1 and a second capacitor C2; among which:

[0073] The first end of the first capacitor, the first end of the second capacitor are connected to the second end of the protection circuit, the first end of the power indicator circuit, and the second end of the first capacitor and the second end of the second capacitor are connected to the ground.

[0074] When the voltage fluctuates, the first capacitor and the second capacitor can store or release electrical energy through charge and discharge to achieve the effect of stabilizing the voltage.

[0075] Furthermore, the capacitance value of the first capacitor is much larger than that of the second capacitor. Preferably, the first capacitor is 100 nF and the second capacitor is 4.7 nF. Among them, the larger first capacitor plays a role in reducing voltage ripple in the circuit, and the smaller second capacitor is used to filter high-frequency signals.

[0076] Furthermore, as Figure 6 shown, the power indicator circuit 112 includes a first resistor R1 and a first light-emitting diode D1; where:

[0077] The first end of the first resistor is connected to the first end of the voltage stabilizing circuit and the second end of the protection circuit. The second end of the first resistor is connected to the positive electrode of the first light-emitting diode, and the negative electrode of the first light-emitting diode is connected to the ground.

[0078] When the power supply is in the on state, the power signal output by the voltage source passes through the first resistor and the first light-emitting diode, causing the first light-emitting diode to light up; when the power supply is not connected, the first light-emitting diode goes out, and the power indicator circuit plays a role in indicating the power-on state of the power supply. Among them, the first resistor is set before the first light-emitting diode to protect the first light-emitting diode from being broken down by a large current.

[0079] In one embodiment, the hall brushless motor includes three hall sensors: a first hall sensor 211, a second hall sensor 212, and a third hall sensor 213. As Figure 7 shown, the status indication module in the fault detection circuit includes a first indication sub-module 121, a second indication sub-module 122, and a third indication sub-module 123. Among them, the first indication sub-module 121, the second indication sub-module 122, and the third indication sub-module 123 are used to be respectively connected to the first hall sensor 211, the second hall sensor 212, and the third hall sensor 213 in an associated manner, where:

[0080] The first ends of the first indication sub-module, the second indication sub-module, and the third indication sub-module are all connected to the first end of the power supply module, and the first end of the power supply module is also used to be connected to the power input terminals of the first hall sensor, the second hall sensor, and the third hall sensor;

[0081] The second end of the first indication sub-module is connected to the signal output terminal of the first hall sensor;

[0082] The second end of the second indication sub-module is connected to the signal output terminal of the second hall sensor;

[0083] The second end of the third indicating sub-module is connected to the signal output end of the third Hall sensor.

[0084] Among them, the power supply module is used to provide operating voltage for the first indicating sub-module, the second indicating sub-module, the third indicating sub-module, the first Hall sensor, the second Hall sensor, and the third Hall sensor. The first indicating sub-module is used to receive and display the output signal of the first Hall sensor, the second indicating sub-module is used to receive and display the output signal of the second Hall sensor, and the third indicating sub-module is used to receive and display the output signal of the second Hall sensor.

[0085] It should be noted that the Hall brushless motor detects the rotor position through three Hall sensors arranged at different positions. Each Hall sensor is generally placed at intervals of 60° or 120°. When the rotor rotates at a constant speed, the Hall sensor outputs high and low levels according to the change law of the magnetic field. Each time the magnetic field changes, the high and low levels output by the Hall sensor are switched once. During the rotation of the rotor, the magnetic pole of the rotor passes over the Hall sensor. According to the current polarity of the rotor, the Hall sensor outputs the corresponding logic level 0 or 1. In this way, as long as the levels generated by the three Hall sensors at different positions are used, the current position of the rotor can be judged, so as to determine the commutation sequence of the motor. During one electrical cycle, the switching states generated by the Hall sensors are not repeated, and the electrical angles occupied by each switching state are equal. Taking the Hall sensors installed at 120° as an example, the output signal phases of the 3 Hall sensors are 120° out of phase with each other. Every time the electrical angle of 60° is rotated, the switching state of one of the Hall sensors will change. During the rotation of the rotor, each Hall sensor will output high and low levels according to a certain rule. When a fault occurs in the rotor, stator or Hall sensor, the output signal of the Hall sensor no longer has regularity.

[0086] In the embodiment of this specification, the first indicating sub-module, the second indicating sub-module, and the third indicating sub-module are used to display the output signals of the respective Hall sensors, and the fault position can be judged according to the display result. The regularity of the output signal of the Hall sensor can be observed according to the display result, so as to judge the fault position. When a fault occurs at different positions, the display results of the output signals of the Hall sensors are different. For example, when the rotor fails, the output signal of the Hall sensor no longer has high and low level changes. When there is a fault in the Hall sensor, the faulty Hall sensor no longer outputs a high level, and the corresponding indicating sub-module no longer changes the display.

[0087] Further, as Figure 8 shown, the first indicating sub-module includes a second resistor R2, a third resistor R3, a fourth resistor R4, a first switching triode Q1, and a second light-emitting diode D2; where:

[0088] The collector of the first switching triode is connected to the first end of the second resistor and the first end of the power supply module;

[0089] The base of the first switching triode is connected to the first end of the third resistor, and the second end of the third resistor, the second end of the second resistor, and the signal output end of the Hall sensor are connected;

[0090] The emitter of the first switching triode is connected to the first end of the fourth resistor, the second end of the fourth resistor is connected to the anode of the second light-emitting diode, and the cathode of the second light-emitting diode is connected to the ground.

[0091] Among them, the second resistor is a bias resistor for setting the static operating point of the first switching triode to improve the stability of the operating point and the linear range. The third resistor is a current-limiting resistor for limiting the base current. The fourth resistor is used to limit the emitter current to prevent the first switching triode from being overloaded. The first switching triode functions as a switch. When the forward bias voltage between the base and the emitter is greater than 0.7 volts, the switch tube conducts, and the current flows through the emitter to the second light-emitting diode, and the second light-emitting diode lights up.

[0092] In the embodiment of the present specification, the first indication module receives the output signal of the first Hall sensor, and this output signal is connected to the base of the first switching triode. When this output signal is a high-level signal, the base voltage is greater than the emitter voltage, and the voltage difference is greater than 0.7 volts, the first switching triode conducts, and the second light-emitting diode lights up. When this output signal is a high-level signal, the first switching triode turns off, and the second light-emitting diode cannot light up. The type of the output signal of the first Hall sensor can be known through the lighting state of the second light-emitting diode.

[0093] Furthermore, as Figure 8 shown, the second indication sub-module includes a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, a second switching triode Q2, and a third light-emitting diode D3; where:

[0094] The collector of the second switching triode is connected to the first end of the fifth resistor and the first end of the power supply module;

[0095] The base of the second switching triode is connected to the first end of the sixth resistor, and the second end of the sixth resistor, the second end of the fifth resistor, and the signal output end of the Hall sensor are connected;

[0096] The emitter of the second switching triode is connected to the first end of the seventh resistor, the second end of the fourth resistor is connected to the anode of the third light-emitting diode, and the cathode of the third light-emitting diode is connected to the ground.

[0097] Among them, the fifth resistor is a bias resistor, which is used to set the quiescent operating point of the second switching triode to improve the stability of the operating point and the linear range. The sixth resistor is a current-limiting resistor, which is used to limit the base current. The seventh resistor is used to limit the emitter current to prevent the second switching triode from being overloaded. The second switching triode functions as a switch. When the forward bias voltage between the base and the emitter is greater than 0.7 volts, the switch tube conducts, and the current flows through the emitter to the third light-emitting diode, which lights up.

[0098] In the embodiment of this specification, the second indication module receives the output signal of the second Hall sensor, and this output signal is connected to the base of the second switching triode. When this output signal is a high-level signal, the base voltage is greater than the emitter voltage, and the voltage difference is greater than 0.7 volts, the second switching triode conducts, and the third light-emitting diode lights up. When this output signal is a high-level signal, the second switching triode turns off, and the third light-emitting diode cannot light up. The type of the output signal of the second Hall sensor can be known through the lighting state of the third light-emitting diode.

[0099] Further, as Figure 8 shown, the third indication sub-module includes an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, a third switching triode Q3, and a fourth light-emitting diode D4; among them:

[0100] The collector of the third switching triode is connected to the first end of the eighth resistor and the first end of the power supply module;

[0101] The base of the third switching triode is connected to the first end of the ninth resistor, and the second end of the ninth resistor, the second end of the eighth resistor, and the signal output end of the Hall sensor are connected;

[0102] The emitter of the third switching triode is connected to the first end of the tenth resistor, the second end of the tenth resistor is connected to the positive electrode of the fourth light-emitting diode, and the negative electrode of the fourth light-emitting diode is grounded.

[0103] Among them, the eighth resistor is a bias resistor, which is used to set the quiescent operating point of the third switching triode to improve the stability of the operating point and the linear range. The ninth resistor is a current-limiting resistor, which is used to limit the base current. The tenth resistor is used to limit the emitter current to prevent the third switching triode from being overloaded. The third switching triode functions as a switch. When the forward bias voltage between the base and the emitter is greater than 0.7 volts, the switch tube conducts, and the current flows through the emitter to the fourth light-emitting diode, which lights up.

[0104] In the embodiment of this specification, the third indication module receives the output signal of the third Hall sensor. This output signal is connected to the base of the third switching triode. When the output signal is a high-level signal, the base voltage is greater than the emitter voltage, and the voltage difference is greater than 0.7 volts. Then the third switching triode conducts, and the fourth light-emitting diode lights up. When the output signal is a high-level signal, the third switching triode turns off, and the fourth light-emitting diode cannot light up. The type of the output signal of the third Hall sensor can be known through the lighting state of the fourth light-emitting diode.

[0105] In the embodiment of this specification, the first indication sub-module, the second indication sub-module, and the third indication sub-module are respectively and associated with the first Hall sensor, the second Hall sensor, and the third Hall sensor to obtain the output signals of the Hall sensors, and the output signals of each Hall sensor are displayed through different indication sub-modules. The type of the output signal of the Hall sensor can be determined according to the lighting state of the light-emitting diode. During the process of fault detection of the Hall brushless motor, rotate the motor rotor, and observe the regularity of the output signals of the Hall sensors through the lighting states of the light-emitting diodes of the first indication sub-module, the second indication sub-module, and the third indication sub-module, so as to determine the fault location, which can significantly improve the fault detection efficiency.

[0106] Please refer to Figure 9 , which is a specific structure diagram of a fault detection circuit provided by the embodiment of the specification. As Figure 9 shown, it includes a power supply module 11, a first indication sub-module 121, a second indication sub-module 122, a third indication sub-module 123, and an interface module 13; the power supply module includes a voltage source VCC, a protection circuit 111, a power supply indication circuit 112, and a voltage stabilization circuit 113; the voltage stabilization circuit includes a first capacitor C1 and a second capacitor C2, the power supply indication circuit 112 includes a first resistor R1 and a first light-emitting diode D1, the first indication sub-module includes a second resistor R2, a third resistor R3, a fourth resistor R4, a first switching triode Q1, and a second light-emitting diode D2, the second indication sub-module includes a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, a second switching triode Q2, and a third light-emitting diode D3, and the third indication sub-module includes an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, a third switching triode Q3, and a fourth light-emitting diode D4. In as Figure 9In the shown fault detection circuit, the power supply module 11 provides operating voltages for the first indication sub-module 121, the second indication sub-module 122, and the third indication sub-module 123, and the power supply module 11 also provides operating voltages for the first Hall sensor 211, the second Hall sensor 212, and the third Hall sensor 213 in the Hall brushless motor through the interface module 13. The first indication sub-module 121, the second indication sub-module 122, and the third indication sub-module 123 are used to be respectively connected to the first Hall sensor 211, the second Hall sensor 212, and the third Hall sensor 213 in an associated manner. During the fault detection process, the first indication sub-module, the second indication sub-module, and the third indication sub-module respectively display the output signals of the Hall sensors, and observe the regularity of the output signals of the Hall sensors according to the display results, so as to judge the fault location, and the fault location of the Hall brushless motor can be quickly detected without complex detection equipment, improving the detection efficiency.

[0107] In one embodiment, the present utility model further provides a fault detector, which includes a housing and the fault detection circuit as described above, and the fault detection circuit is arranged in the housing. By using this fault detection, the Hall brushless motor can be quickly detected through the fault detection circuit arranged therein, improving the fault detection efficiency.

[0108] Finally, each embodiment in this specification is described in a progressive manner. The same or similar parts among the embodiments can be referred to each other, and the key points of each embodiment are to illustrate the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can refer to the partial description of the method embodiment.

[0109] The above is only the embodiments of this specification and is not used to limit this specification. For those skilled in the art, various changes and modifications can be made to this specification. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this specification shall be included within the scope of the claims of this specification.

Claims

1. A fault detection circuit for a Hall brushless motor, which is used to connect with a Hall sensor in the Hall brushless motor, characterized in that, The fault detection circuit includes a power supply module and a status indication module; wherein: The first end of the power supply module is connected to the first end of the status indication module, and the first end of the power supply module is also used to be connected to the power input terminal of the Hall sensor; The second end of the status indication module is used to be connected to the signal output terminal of the Hall sensor for displaying the output signal of the Hall sensor.

2. The fault detection circuit according to claim 1, wherein It further includes an interface module, which is connected to the power supply module and the status indication module and is used to be connected to the Hall sensor.

3. The fault detection circuit according to claim 1, wherein, The power supply module includes a voltage source, a protection circuit, a power indication circuit and a voltage stabilizing circuit; wherein: The positive pole of the voltage source is connected to the first end of the protection circuit, and the negative pole of the voltage source is grounded; The second end of the protection circuit is connected to the first end of the voltage stabilizing circuit, the first end of the power indication circuit and the first end of the status indication module, and the second end of the protection circuit is also used to be connected to the power input terminal of the Hall sensor; The second end of the voltage stabilizing circuit and the second end of the power indication circuit are grounded.

4. The fault detection circuit according to claim 3, wherein The protection circuit includes a fuse resistor; wherein: The first end of the fuse resistor is connected to the positive pole of the voltage source, and the second end of the fuse resistor is connected to the first end of the voltage stabilizing circuit and the first end of the power indication circuit.

5. The fault detection circuit according to claim 3, wherein, The voltage stabilizing circuit includes a first capacitor and a second capacitor; wherein: The first end of the first capacitor, the first end of the second capacitor are connected to the second end of the protection circuit and the first end of the power indication circuit, and the second end of the first capacitor and the second end of the second capacitor are grounded.

6. The fault detection circuit according to claim 3, wherein, The power indication circuit includes a first resistor and a first light emitting diode; wherein: The first end of the first resistor is connected to the first end of the voltage stabilizing circuit and the second end of the protection circuit, the second end of the first resistor is connected to the positive pole of the first light emitting diode, and the negative pole of the first light emitting diode is grounded.

7. The fault detection circuit according to claim 1, wherein, The status indication module includes a first indication sub-module, a second indication sub-module and a third indication sub-module, which are used to be respectively connected in association with a first Hall sensor, a second Hall sensor and a third Hall sensor included in the Hall sensor; wherein: The first end of the first indication sub-module, the first end of the second indication sub-module and the first end of the third indication sub-module are all connected to the first end of the power supply module, and the first end of the power supply module is also used to be connected to the power input terminals of the first Hall sensor, the second Hall sensor and the third Hall sensor; The second end of the first indication sub-module is connected to the signal output terminal of the first Hall sensor; The second end of the second indication sub-module is connected to the signal output terminal of the second Hall sensor; The second end of the third indication sub-module is connected to the signal output terminal of the third Hall sensor.

8. The fault detection circuit according to claim 7, wherein The first indication sub-module includes a second resistor, a third resistor, a fourth resistor, a first switching triode and a second light emitting diode; wherein: The collector of the first switching triode is connected to the first end of the second resistor and the first end of the power supply module; The base of the first switching triode is connected to the first end of the third resistor, and the second end of the third resistor, the second end of the second resistor and the signal output end of the Hall sensor are connected; The emitter of the first switching triode is connected to the first end of the fourth resistor, the second end of the fourth resistor is connected to the positive electrode of the second light-emitting diode, and the negative electrode of the second light-emitting diode is connected to the ground.

9. The fault detection circuit according to claim 7, wherein The second indication sub-module includes a fifth resistor, a sixth resistor, a seventh resistor, a second switching triode and a third light-emitting diode; wherein: The collector of the second switching triode is connected to the first end of the fifth resistor and the first end of the power supply module; The base of the second switching triode is connected to the first end of the sixth resistor, and the second end of the sixth resistor, the second end of the fifth resistor and the signal output end of the Hall sensor are connected; The emitter of the second switching triode is connected to the first end of the seventh resistor, the second end of the fourth resistor is connected to the positive electrode of the third light-emitting diode, and the negative electrode of the third light-emitting diode is connected to the ground.

10. The fault detection circuit according to claim 7, wherein The third indication sub-module includes an eighth resistor, a ninth resistor, a tenth resistor, a third switching triode and a fourth light-emitting diode; wherein: The collector of the third switching triode is connected to the first end of the eighth resistor and the first end of the power supply module; The base of the third switching triode is connected to the first end of the ninth resistor, and the second end of the ninth resistor, the second end of the eighth resistor and the signal output end of the Hall sensor are connected; The emitter of the third switching triode is connected to the first end of the tenth resistor, the second end of the tenth resistor is connected to the positive electrode of the fourth light-emitting diode, and the negative electrode of the fourth light-emitting diode is connected to the ground.

11. A fault detector, characterized in that, It includes a housing and the fault detection circuit according to any one of claims 1-10, and the fault detection circuit is arranged in the housing.

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