Motor stalling detection device

Abstract

The utility model discloses a motor stalling detection device, which is characterized in that a rotor is added on a rotating shaft of a motor to be detected, a stator is arranged around the rotor, and the rotating shaft of the motor to be detected drives the rotor to rotate, so that the stator cuts magnetic induction lines, and an electric wire connected to the stator generates voltage and current. The rotation condition of the to-be-detected motor can be judged by detecting the voltage and the current, and when the motor is blocked, a response can be made in time.

Description

Technical Field

[0001] This utility model relates to the field of motor control technology, and in particular to a device for real-time monitoring of motor stall by detecting changes in the electrical parameters of the stator winding. Background Technology

[0002] Currently, motor stall detection often uses current sensors to monitor sudden current changes or temperature sensors to indirectly determine stall by detecting motor overheating. However, current sensors are expensive and have detection delays; temperature detection cannot respond in real time to the instantaneous stall state, is costly, highly susceptible to environmental influences, and its accuracy is difficult to guarantee, which can also affect motor lifespan; some solutions propose using Hall effect sensors to detect rotor position, but these are structurally complex and require additional sensor installation. Therefore, there is an urgent need for a stall detection solution that is simple in structure, low in cost, and has strong real-time performance. Summary of the Invention

[0003] To overcome the above problems, the inventors conducted in-depth research and designed a motor stall detection device. In this device, a rotor is added to the shaft of the motor under test, and a stator is arranged around the rotor. The rotor is driven to rotate by the shaft of the motor under test, which causes the stator to cut magnetic field lines. Voltage and current are generated on the wires connected to the stator. By detecting the voltage and current, the rotation status of the motor under test can be determined. When the motor stalls, it can respond in a timely manner, thus completing this utility model.

[0004] Specifically, the purpose of this invention is to provide a motor stall detection device.

[0005] The device includes a stator 1 and a rotor 2. Two wires 3 are connected to the stator 1, and a detection module is connected to the end of the wires 3. The rotor 2 is driven to rotate inside the stator 1 by the shaft 4 of the motor under test. The voltage and / or current displayed on the detection module are monitored in real time to determine whether the motor under test is stalled.

[0006] The stator 1 includes multiple windings 11 arranged in a ring around each other and fixedly mounted on the winding mounting bracket 12; the wire 3 is connected to the windings 11.

[0007] The winding mounting bracket 12 is fixed on the bottom shell 14;

[0008] The bottom shell is fixed to the motor or to the motor mounting bracket by screws 13.

[0009] A bottom shell 14 is also fixed to the bottom of the winding mounting bracket 12 by screws 13.

[0010] The stator 1 is fixedly installed on the outside of the motor to be tested, and the shaft 4 of the motor to be tested passes through the bottom shell 14 and the winding mounting bracket 12 in sequence and extends out from the middle of the multiple windings 11.

[0011] The rotor 2 includes two semi-circular magnets 21, which are mounted on a magnet mounting bracket 22, and the magnet mounting bracket 22 can drive the magnets 21 thereon to rotate.

[0012] The magnet mounting bracket 22 is sleeved and fixed on the rotating shaft 4 of the motor to be tested, and drives the magnet 21 on it to rotate synchronously with the rotating shaft 4.

[0013] The detection module monitors and displays the voltage and / or current on the wire 3 in real time, and issues a stall warning signal when the voltage and / or current are below a threshold.

[0014] The beneficial effects of this invention include:

[0015] (1) The motor stall detection device provided by the present invention has a simplified structure, uses a small stator and rotor as sensors, omits external probes, has low cost and stable performance.

[0016] (2) The motor stall detection device provided by the present invention has strong real-time performance, can directly respond to sudden changes in electrical parameters, and the detection delay can be less than 50ms. Attached Figure Description

[0017] Figure 1 An exploded view of the overall structure of the motor stall detection device of this application is shown;

[0018] Figure 2 An exploded view of the stator structure of the motor stall detection device of this application is shown;

[0019] Figure 3 An exploded view of the rotor structure of the motor stall detection device of this application is shown.

[0020] Explanation of reference numerals in the attached figures

[0021] 1-Stator

[0022] 11-Winding

[0023] 12-Winding Mounting Frame

[0024] 13-Screws

[0025] 14-Bottom Shell

[0026] 2-rotor

[0027] 21-Magnet

[0028] 22-Magnetic Mounting Bracket

[0029] 3-Wire

[0030] 4-shaft

[0031] 5-Outer shell Detailed Implementation

[0032] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Through these descriptions, the features and advantages of the present invention will become clearer and more apparent.

[0033] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments. Although various aspects of embodiments are shown in the accompanying drawings, the drawings are not necessarily drawn to scale unless specifically indicated otherwise.

[0034] This invention provides a motor stall detection device, such as... Figure 1 As shown, the device includes a stator 1 and a rotor 2. Two wires 3 are connected to the stator 1, and a detection module is connected to the end of each wire 3. The rotor 2 rotates inside the stator 1 via the shaft 4 of the motor under test. The voltage and / or current displayed on the detection module are monitored in real time to determine whether the motor under test is stalled. Since the rotation of the motor under test generates a corresponding induced electromotive force, the magnitude of which is related to the rotational speed of the motor under test, the rotational status of the motor under test can be obtained in real time by detecting this voltage and / or current.

[0035] In a preferred embodiment, such as Figure 2 As shown, the stator 1 includes a plurality of windings 11, which are arranged in a ring around each other and are all fixedly mounted on the winding mounting bracket 12; the wire 3 is connected to the windings 11; preferably, in this application, the windings can be set to 8 or more.

[0036] The winding mounting bracket 12 is fixed to the bottom shell 14; the bottom shell is fixed to the motor or to the motor mounting bracket by screws 13; other fixing methods and fixing positions can also be selected, as long as the bottom shell 14 and the connected stator are firmly fixed.

[0037] Preferably, the stator 1 is fixedly installed on the outside of the motor to be tested, and the shaft 4 of the motor to be tested passes through the bottom shell 14 and the winding mounting bracket 12 in sequence and extends out from the middle of the multiple windings 11.

[0038] Preferably, a plurality of baffles are provided on the winding mounting bracket 12 to separate and fix each winding 11.

[0039] In a preferred embodiment, such as Figure 3 As shown, the rotor 2 includes two semi-circular magnets 21, which are mounted on a magnet mounting bracket 22, and the magnet mounting bracket 22 can drive the magnets 21 thereon to rotate.

[0040] Preferably, the magnet mounting bracket 22 is sleeved and fixed on the rotating shaft 4 of the motor to be tested, and drives the magnet 21 on it to rotate synchronously with the rotating shaft 4.

[0041] In a preferred embodiment, the detection module monitors and displays the voltage and / or current on the display wire 3 in real time, and issues a stall warning signal when the voltage and / or current fall below a threshold. The threshold can be set based on the voltage and / or current generated by the motor under test during normal operation; for example, it can be set to output a stall warning signal when a voltage or current change exceeds 30%. In actual testing, only current can be detected, only voltage can be detected, or both can be detected simultaneously, with a stall warning signal output when either reaches the threshold.

[0042] Preferably, the detection module may be connected to an alarm indicator light or a speaker to issue a stall warning signal. The detection module may include an ammeter, voltmeter, or other sensors capable of performing detection tasks.

[0043] In a preferred embodiment, the device further includes a housing 5, which covers the stator 1 and rotor 2 and is fixed to the motor to be tested. By fixing and protecting the stator 1 and rotor 2 with the housing 5, it is possible to ensure that the stator 2 is flatly pressed onto the housing 14, thus ensuring the cutting effect of the magnetic field lines.

[0044] The present invention has been described above with reference to preferred embodiments; however, these embodiments are merely exemplary and illustrative. Various substitutions and modifications can be made to the present invention based on these embodiments, all of which fall within the scope of protection of the present invention.

Claims

1. A motor stall detection device, characterized in that, The device includes a stator (1) and a rotor (2). Two wires (3) are connected to the stator (1). The ends of the wires (3) are connected to a detection module. The rotor (2) is driven to rotate inside the stator (1) by the shaft (4) of the motor under test. The voltage and / or current displayed on the detection module are monitored in real time to determine whether the motor under test is stalled.

2. The motor stall detection device according to claim 1, characterized in that, The stator (1) includes multiple windings (11) arranged in a ring around each other and fixedly mounted on a winding mounting bracket (12); the wire (3) is connected to the windings (11).

3. The motor stall detection device according to claim 2, characterized in that, The winding mounting bracket (12) is fixed on the bottom shell (14); The bottom shell is fixed to the motor or to the motor mounting bracket by screws (13).

4. The motor stall detection device according to claim 2, characterized in that, The stator (1) is fixedly installed on the outside of the motor to be tested, and the shaft (4) of the motor to be tested passes through the bottom shell (14) and the winding mounting bracket (12) in sequence and extends out from the middle of the multiple windings (11).

5. The motor stall detection device according to claim 1, characterized in that, The rotor (2) includes two semi-circular magnets (21), which are mounted on a magnet mounting bracket (22) and the magnet mounting bracket (22) can drive the magnets (21) thereon to rotate.

6. The motor stall detection device according to claim 5, characterized in that, The magnet mounting bracket (22) is fitted and fixed on the rotating shaft (4) of the motor to be tested, and drives the magnet (21) on it to rotate synchronously with the rotating shaft (4).

7. The motor stall detection device according to claim 1, characterized in that, The detection module monitors and displays the voltage and / or current on the wire (3) in real time, and issues a stall warning signal when the voltage and / or current is below a threshold.

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