Testing device and elevator testing system

Abstract

The present disclosure provides a testing device, which can be applied to the field of elevator technology. The testing device is used for performing a star connection test on an elevator. The elevator includes a car and a permanent magnet synchronous traction machine. Among them, the testing device includes: a star connection module configured to be connected to the permanent magnet synchronous traction machine. The star connection module is configured to: in response to a first instruction, switch to a test mode to make the permanent magnet synchronous traction machine in a star connection state; a speed detection module configured to be connected to the elevator. The speed detection module is configured to: when the star connection module is in the test mode, detect the moving speed of the car and output a second instruction when the moving speed of the car meets a preset condition; a control module connected to the speed detection module. The control module is further configured to be connected to the elevator. The control module is configured to: in response to the second instruction, decelerate the car. The present disclosure also provides an elevator testing system. The testing device of the present disclosure can improve the convenience of the star connection test.

Description

Technical Field

[0001] The present disclosure relates to the technical field of elevators, and particularly to a testing device and an elevator testing system. Background Art

[0002] With the increasing development of the construction industry and the increasing improvement of people's living standards, the requirements for the safety technology of elevators are also getting higher and higher. Permanent magnet synchronous traction machines have always been promoted and applied as advantages because they can achieve star connection braking. Specifically, when the braking torque of the elevator brake is insufficient or fails, and the weights on the car side and the counterweight side of the elevator are in an unbalanced state, the suspension system will cause the elevator car to overspeed under the action of gravity, thus bringing serious safety risks. To eliminate this risk, for a permanent magnet synchronous traction machine, after cutting off the power supply circuit of the permanent magnet synchronous traction machine, the three-phase windings of the permanent magnet synchronous traction machine can be connected in series in a star connection with a resistor to limit the speed of the car, that is, the star connection braking technology of the permanent magnet synchronous traction machine.

[0003] Currently, when testing the star connection ability of a permanent magnet synchronous traction machine, it is necessary for the staff to manually short-circuit the three-phase windings of the permanent magnet synchronous traction machine through cables or other means, open the brake, and then observe the coasting speed of the elevator at this time. When the coasting speed is too high, the staff needs to immediately close the brake to prevent the elevator from hitting the top or falling to the bottom. However, the above operation process is cumbersome, the testing process has a high dependence on manpower, and the testing efficiency is low. Summary of the Invention

[0004] In view of the above problems, the present disclosure provides a testing device and an elevator testing system.

[0005] According to a first aspect of the present disclosure, there is provided a testing device for performing a star connection test on an elevator. The elevator includes a car and a permanent magnet synchronous traction machine for driving the car to move in the depth direction of the hoistway. Wherein, the testing device includes:

[0006] A star connection module for connecting to the permanent magnet synchronous traction machine. The star connection module is configured to: in response to a first instruction, switch to a test mode to make the permanent magnet synchronous traction machine in a star connection state;

[0007] A speed detection module for connecting to the elevator. The speed detection module is configured to: when the star connection module is in the test mode, detect the movement speed of the car, and output a second instruction when the movement speed of the car meets a preset condition;

[0008] A control module connected to the speed detection module. The control module is further configured to connect to the elevator. The control module is configured to: in response to the second instruction, decelerate the car.

[0009] According to an embodiment of the present disclosure, the star connection module is further configured to: in response to a third instruction, switch to an operating mode to release the star connection state of the permanent magnet synchronous traction machine, and enable the permanent magnet synchronous traction machine to drive the car to move along the depth direction of the hoistway according to a drive signal.

[0010] According to an embodiment of the present disclosure, the elevator further includes an inverter for providing the drive signal, and is characterized in that,

[0011] The star connection module includes a gating unit and a short-circuiting unit. The inverter is connected to the three-phase windings of the permanent magnet synchronous traction machine through the gating unit, and the short-circuiting unit is connected between the gating unit and the three-phase windings;

[0012] When the star connection module is in the test mode, the gating unit disconnects the inverter from the three-phase windings, and a conductive path is formed between the short-circuiting unit and the three-phase windings to short-circuit the three-phase windings; when the star connection module is in the / operating mode, the gating unit conducts the inverter to the three-phase windings, and an open circuit is formed between the short-circuiting unit and the three-phase windings.

[0013] According to an embodiment of the present disclosure, the short-circuiting unit includes a three-phase contactor. A first end of the three-phase contactor is connected to the three-phase windings, and a second end of the three-phase contactor is short-circuited;

[0014] When the star connection module is in the test mode, the first end and the second end of the three-phase contactor are conducted; when the star connection module is in the operating mode, the first end and the second end of the three-phase contactor are disconnected.

[0015] According to an embodiment of the present disclosure, the control module is specifically configured to: in response to the second instruction, switch to a braking state to decelerate the car until it stops moving along the depth direction of the hoistway; and,

[0016] In response to a fourth instruction, switch to a moving state to allow the car to move along the depth direction of the hoistway.

[0017] According to an embodiment of the present disclosure, the control module is further configured to:

[0018] When the duration of the star connection module in the test mode reaches a preset duration and the control module does not receive the second instruction, switch to the moving state.

[0019] According to an embodiment of the present disclosure, the elevator further includes a braking module configured to brake the car when no DC signal is received and stop braking the car when the DC signal is received;

[0020] The control module includes a DC power supply that outputs the DC signal when the control module is in the moving state and stops outputting the DC signal when the control module is in the braking state.

[0021] According to an embodiment of the present disclosure, the control module further includes an adjustment unit connected to the DC power supply and configured to adjust the magnitude of the DC signal output by the DC power supply according to the user's operation.

[0022] According to an embodiment of the present disclosure, the speed detection module is specifically configured to:

[0023] Obtain the moving speed of the car through an encoder on the permanent magnet synchronous traction machine, a speed sensor in the hoistway, or a position sensor in the hoistway.

[0024] A second aspect of the present disclosure provides an elevator test system, which includes an elevator and the above-mentioned test device.

[0025] One or more of the above embodiments have the following advantages or beneficial effects:

[0026] Workers do not need to manually short-circuit the three-phase windings of the permanent magnet synchronous traction machine through cables, nor do they need to observe the car's running-away speed and manually control the brake to brake the elevator, which greatly reduces the dependence on manpower during the star connection test process and improves the convenience of the star connection test. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Through the following description of the embodiments of the present disclosure with reference to the drawings, the above content and other objects, features, and advantages of the present disclosure will become clearer. In the drawings:

[0028] Figure 1 Schematically shows a schematic diagram of the test device according to an embodiment of the present disclosure;

[0029] Figure 2 Schematically shows a schematic diagram of the functional modules of the test device according to an embodiment of the present disclosure;

[0030] Figure 3 Schematically shows a schematic diagram of the star connection module according to an embodiment of the present disclosure;

[0031] Figure 4 Schematically shows a schematic diagram of the gating unit and the short-circuiting unit according to an embodiment of the present disclosure. Detailed implementation manners

[0032] Hereinafter, embodiments of the present disclosure will be described with reference to the accompanying drawings. However, it should be understood that these descriptions are merely exemplary and are not intended to limit the scope of the present disclosure. In the following detailed description, for the sake of explanation, many specific details are set forth to provide a thorough understanding of the embodiments of the present disclosure. However, obviously, one or more embodiments can also be implemented without these specific details. In addition, in the following description, descriptions of well-known structures and technologies are omitted to avoid unnecessarily confusing the concepts of the present disclosure.

[0033] The terms used herein are merely for describing specific embodiments and are not intended to limit the present disclosure. The terms "including", "comprising", etc. used herein indicate the presence of the described features, steps, operations, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, or components.

[0034] All terms used herein (including technical and scientific terms) have the meanings commonly understood by those skilled in the art, unless otherwise defined. It should be noted that the terms used herein should be interpreted as having a meaning consistent with the context of this specification and should not be interpreted in an idealized or overly rigid manner.

[0035] In the case of using expressions such as "at least one of A, B, and C, etc.", generally, it should be interpreted according to the meaning commonly understood by those skilled in the art (for example, "a system having at least one of A, B, and C" should include, but is not limited to, a system having only A, only B, only C, having A and B, having A and C, having B and C, and / or having A, B, and C, etc.).

[0036] Embodiments of the present disclosure provide a testing device. Figure 1 A schematic diagram of the testing device according to an embodiment of the present disclosure is schematically shown, as Figure 1 shown, the testing device 200 is used to perform a star connection test on the elevator 100, and the elevator 100 includes a car 110 and a permanent magnet synchronous traction machine 120 for driving the car 110 to move in the depth direction of the hoistway (i.e., ascending or descending). Figure 2 A schematic diagram of the functional modules of the testing device according to an embodiment of the present disclosure is schematically shown, in combination with Figure 1 and Figure 2As shown, the test device 200 includes: a star connection module 210, a speed detection module 220, and a control module 230. The control module 230 is connected to the speed detection module 220. The star connection module 210 is used to connect to the permanent magnet synchronous traction machine 120. The star connection module 210 is configured to: in response to a first instruction, switch to a test mode to make the permanent magnet synchronous traction machine 120 in a star connection state. The speed detection module 220 is used to connect to the elevator 100. The speed detection module 220 is configured to: when the star connection module 210 is in the test mode, detect the moving speed of the car 110, and output a second instruction when the moving speed of the car 110 meets a preset condition. The control module 230 is also used to connect to the elevator 100. For example, it is connected to the braking module 140 of the elevator 100. The control module 230 is configured to: in response to the second instruction, decelerate the car 110. For example, decelerate the car 110 through the braking module 140.

[0037] In an embodiment of the present disclosure, the test device 200 can be detachably connected to the elevator. When it is necessary to perform a star connection test on the elevator, the staff can connect the test device 200 to the elevator. After the star connection test is completed, the staff can remove the test device 200. Optionally, a first trigger mechanism, such as a trigger button, can be provided on the test device 200. The staff provides the first instruction to the star connection module 210 by operating the first trigger mechanism. The star connection module 210 can have multiple working modes including the test mode, and the star connection module 210 can switch between multiple working modes. The specific method will be described in detail below and will not be elaborated here first. When the star connection module 210 switches to the test mode, it can make the permanent magnet synchronous traction machine 120 in a star connection state. At this time, the permanent magnet synchronous traction machine 120 is equivalent to a three-phase AC permanent magnet generator. When the unbalanced torque of the elevator mechanical balance system drives the traction wheel of the permanent magnet synchronous traction machine 120 to rotate, the permanent magnet synchronous traction machine 120 can absorb mechanical energy and convert it into electrical energy, and convert the electrical energy into an electromagnetic torque to counteract the mechanical torque through the closed loop formed by the star connection, so that the rotation speed of the traction wheel of the permanent magnet synchronous traction machine 120 is reduced, thereby realizing the star connection braking function.

[0038] Exemplarily, in an embodiment of the present disclosure, the star connection module 210 can disconnect the permanent magnet synchronous traction machine 120 from the power supply end and short-circuit the three-phase windings of the permanent magnet synchronous traction machine 120, so that the permanent magnet synchronous traction machine 120 is in a star connection state. Of course, the star connection module 210 can also use other connection methods (such as series resistance, etc.) that those skilled in the art can think of to make the permanent magnet synchronous traction machine 120 in a star connection state, which can be determined according to actual needs.

[0039] In an embodiment of the present disclosure, the speed detection module 220 may be connected to the permanent magnet synchronous traction machine 120 or a sensor in the hoistway, so as to calculate the moving speed of the car 110 based on the operating parameters of the permanent magnet synchronous traction machine 120 or sensor readings, etc. Optionally, the preset conditions may be determined according to actual needs. Exemplarily, the preset conditions may include a preset speed threshold. For example, when the speed detection module 220 detects that the running speed of the car 110 exceeds the preset speed threshold, a second instruction is output. In an embodiment of the present disclosure, the preset speed threshold may be determined according to actual needs and is not limited herein. Exemplarily, the preset speed threshold may be set between 0.27 m / s and 0.33 m / s. For example, the preset speed threshold may be set to 0.3 m / s.

[0040] In some specific embodiments, the elevator 100 may further include a braking module 140. During the star connection test, the control module 230 may be connected to the braking module 140 in the elevator. Exemplarily, the braking module 140 may include a brake. The control module 230 can control the braking module 140 in response to the second instruction to decelerate the car 110 until the preset speed is reached. For example, the preset speed may be set to "0". At this time, the control module 230 can make the car 110 stop immediately in response to the second instruction.

[0041] In an embodiment of the present disclosure, when a star connection test needs to be performed on the elevator, the staff provides a first instruction through the first trigger mechanism. After that, the braking module 140 of the elevator can be manually or automatically controlled through the control module 230 to allow the car 110 to move along the depth direction of the hoistway, that is, to allow the car 110 to start coasting. At this time, the speed detection module 220 detects the moving speed of the car 110, and when the moving speed is too fast, automatically outputs a second instruction, so that the control module 230 can control the braking module 140 of the elevator to decelerate the car 110, thereby preventing the car 110 from overshooting or bottoming out.

[0042] In summary, in an embodiment of the present disclosure, the star connection module 210, the speed detection module 220, and the control module 230 are integrated to design the test device 200. Compared with the traditional star connection test process, when using the test device 200 of the present disclosure embodiment, the staff does not need to manually short-circuit the three-phase windings 121 of the permanent magnet synchronous traction machine through cables, nor observe the coasting speed of the car 110 and manually control the brake to brake the elevator, which greatly reduces the dependence on manpower in the star connection test process and improves the convenience of the star connection test.

[0043] The following combines Figures 1 to 4 to provide a detailed description of the test device 200 according to the embodiments of the present disclosure.

[0044] The inventor found in the study that in the traditional star-sealing test process, the staff is required to manually disconnect the connection line between the frequency converter and the permanent magnet synchronous traction machine, and then short-circuit the three-phase winding 121 of the permanent magnet synchronous traction machine, and open the brake of the elevator, etc., so as to start the star-sealing test. In order to test the star-sealing ability of the elevator on different floors, the staff is required to first release the short circuit of the three-phase winding 121, and then manually connect the frequency converter with the permanent magnet synchronous traction machine, so as to drive the permanent magnet synchronous traction machine through the frequency converter to run the elevator to the designated floor position. The above-mentioned operations are independent of each other, and each operation is relatively cumbersome. Not only that, when performing the star-sealing test, in order to ensure that the test results are safe and reliable, it is necessary to test the star-sealing ability of the permanent magnet synchronous traction machine of the elevator under multiple floors and different loads (empty load, full load) and other conditions, which requires the staff to repeat the above operations repeatedly, and the entire test process is often very complicated.

[0045] In view of this, in some specific embodiments, the star-sealing module 210 is also configured to: in response to a third instruction, switch to the operating mode to release the star-sealing state of the permanent magnet synchronous traction machine 120, and enable the permanent magnet synchronous traction machine 120 to drive the car 110 to move along the depth direction of the shaft according to the driving signal.

[0046] In the embodiment of the present disclosure, the third instruction can also be issued through the first trigger mechanism described above, so that the star-sealing module 210 can switch between the test mode and the operation mode, so that through one instruction (the first instruction) from the staff, the permanent magnet synchronous traction machine 120 enters the star-sealing state to perform the star-sealing test; through another instruction (the third instruction) from the staff, the permanent magnet synchronous traction machine 120 can drive the car 110 to move to the designated floor, thereby realizing the above-mentioned entire test process (different floors / different loads, etc.), which greatly simplifies the tedious operation of the staff and further improves the test efficiency.

[0047] Figure 3 The schematic diagram of the star sealing module according to the embodiment of the present disclosure is schematically shown. Figure 3As shown, the elevator 100 further includes a frequency converter 130 for providing a drive signal. The star connection module 210 includes a gating unit 211 and a short - circuiting unit 212. The frequency converter 130 is connected to the three - phase windings 121 of the permanent - magnet synchronous traction machine 120 through the gating unit 211, and the short - circuiting unit 212 is connected between the gating unit 211 and the three - phase windings 121. When the star connection module 210 is in the test mode, the gating unit 211 disconnects the frequency converter 130 from the three - phase windings 121, and a conductive path is formed between the short - circuiting unit 212 and the three - phase windings 121 to short - circuit the three - phase windings 121. When the star connection module 210 is in the operation mode, the gating unit 211 conducts the frequency converter 130 to the three - phase windings 121, and an open circuit is formed between the short - circuiting unit 212 and the three - phase windings 121, so that the frequency converter 130 can provide a drive signal to the permanent - magnet synchronous traction machine 120 to drive the car 110 to move to the designated floor.

[0048] Optionally, when the star connection module 210 switches to the test mode, the gating unit 211 can act prior to the short - circuiting unit 212. That is, the gating unit 211 first disconnects the frequency converter 130 from the three - phase windings 121, and then the short - circuiting unit 212 forms a conductive path with the three - phase windings 121 to short - circuit the three - phase windings 121, thus avoiding damage to the frequency converter 130 due to short - circuit caused by the gating unit 211 lagging behind the short - circuiting unit 212 when the star connection module 210 switches to the test mode. When the star connection module 210 switches to the operation mode, the short - circuiting unit 212 can act prior to the gating unit 211. That is, the short - circuiting unit 212 first forms an open circuit with the three - phase windings 121, and then the gating unit 211 conducts the frequency converter 130 to the three - phase windings 121, thus avoiding damage to the frequency converter 130 due to short - circuit caused by the short - circuiting unit 212 lagging behind the gating unit 211 when the star connection module 210 switches to the operation mode.

[0049] Figure 4 Schematically shows a schematic diagram of the gating unit and the short - circuiting unit according to an embodiment of the present disclosure. As Figure 4 shown, the gating unit 211 and the short - circuiting unit 212 may include components capable of implementing a switching function, such as contactors or relays, etc., which can be specifically determined according to actual needs and are not limited herein.

[0050] In some specific embodiments, the short - circuit unit 212 includes a three - phase contactor. The first end of the three - phase contactor is connected to the three - phase winding 121, and the second end of the three - phase contactor is short - circuited. For example, the second end of the three - phase contactor can be short - circuited through a wire. When the star - shorting module 210 is in the test mode, the first end and the second end of the three - phase contactor are conducted, so as to form a conductive path with the three - phase winding 121, enabling the three - phase winding 121 to be short - circuited. When the star - shorting module 210 is in the operation mode, the first end and the second end of the three - phase contactor are disconnected, so as to form an open circuit with the three - phase winding 121, releasing the short - circuit of the three - phase winding 121.

[0051] In some specific embodiments, the control module 230 is specifically configured to: in response to the second instruction, switch to the braking state to decelerate the car 110 until it stops moving along the depth direction of the hoistway. And, in response to the fourth instruction, switch to the moving state to allow the car 110 to move along the depth direction of the hoistway.

[0052] In the embodiments of the present disclosure, a second trigger mechanism, such as a trigger button, etc., can be provided on the test device 200. The staff can provide the fourth instruction through the second trigger mechanism. In this way, on the one hand, when starting the star - shorting test, the staff can allow the car 110 to move along the depth direction of the hoistway through the control module 230, that is, allow the car 110 to start coasting, so as to start the star - shorting test. On the other hand, during the star - shorting test, the control module 230 can cooperate with the speed - measuring module 220 to decelerate the car 110 until it stops, preventing the car 110 from over - running or falling to the bottom.

[0053] In some specific embodiments, the elevator 100 further includes a braking module 140, and the braking module 140 is configured to: brake the car 110 when no DC signal is received, and release the braking of the car 110 when a DC signal is received. The control module 230 includes a DC power supply. When the control module 230 is in the moving state, the DC power supply outputs a DC signal. When the control module 230 is in the braking state, the DC power supply stops outputting the DC signal.

[0054] In the embodiments of the present disclosure, the braking module 140 can include a brake. During the star - shorting test, the elevator is in a power - off state. Therefore, the power supply line stops supplying power to the brake, and the brake brakes the car 110. At this time, the control module 230 can provide a DC signal to the brake, so as to release the brake and allow the car 110 to start coasting, thus starting the star - shorting test.

[0055] It should be noted that in the embodiments of the present disclosure, the specific type of power supply adopted by the control module 230 can be determined according to the requirements of the brake. Exemplarily, in some other specific embodiments, when the brake realizes braking or releases braking through an AC power supply, the control module 230 may include an AC power supply. For example, when the control module 230 is in a moving state, the AC power supply outputs an AC signal to release the brake. When the control module 230 is in a braking state, the AC power supply stops outputting the AC signal to brake the car 110.

[0056] In some specific embodiments, the control module 230 is further configured to: when the duration of the star connection module 210 in the test mode reaches a preset duration and the control module 230 does not receive a second instruction, switch to the moving state.

[0057] In the embodiments of the present disclosure, the control module 230 adopting the above method can automatically enter the moving state after entering the star connection test, so as to output a DC signal to release the brake. And when the duration of the star connection module 210 in the test mode reaches the preset duration, that is, the control module 230 enters the moving state after a delay after entering the star connection test, so as to form a certain buffer time to ensure the safety of the test.

[0058] In some specific embodiments, the control module 230 further includes an adjustment unit, and the adjustment unit is connected to the DC power supply. The adjustment unit is configured to: adjust the magnitude of the DC signal output by the DC power supply according to the user's operation.

[0059] In the embodiments of the present disclosure, the setting method of the adjustment unit can be determined according to actual needs and is not limited herein. Exemplarily, at least one adjustment gear can be set on the adjustment unit, and each adjustment gear corresponds to a DC signal of a specific magnitude. The staff can select the adjustment gear of the adjustment unit according to actual needs, so that the DC power supply outputs a DC signal of the corresponding magnitude. In some other examples, an adjustment knob can also be set on the adjustment unit, and the magnitude of the DC signal output by the DC power supply can be linearly adjusted by the adjustment knob. In the embodiments of the present disclosure, the magnitude of the DC signal can be determined according to the opening voltage of the brake and is not limited herein. Exemplarily, the adjustable range of the voltage magnitude of the DC signal can be set between 100V and 120V.

[0060] In some specific embodiments, the speed detection module 220 is specifically configured to: obtain the moving speed of the car 110 through an encoder on the permanent magnet synchronous traction machine 120, a speed sensor in the hoistway or a position sensor in the hoistway.

[0061] In an embodiment of the present disclosure, when the speed detection module 220 obtains the moving speed of the car 110 through the encoder on the permanent magnet synchronous traction machine 120, the speed detection module 220 can collect the operating parameters of the permanent magnet synchronous traction machine 120 in the encoder, and then obtain the moving speed of the car 110. For example, the speed detection module 220 can collect the rotational speed of the permanent magnet synchronous traction machine 120 and calculate the moving speed of the car 110 through the rotational speed.

[0062] When the speed detection module 220 obtains the moving speed of the car 110 through the speed sensors in the hoistway, the speed detection module 220 can collect the speed parameters obtained by at least one speed sensor in the hoistway, and then obtain the moving speed of the car 110. For example, the speed detection module 220 can collect the speed parameters obtained by multiple speed sensors in the hoistway and calculate the moving speed of the car 110 based on the speed differences of the multiple speed sensors.

[0063] When the speed detection module 220 obtains the moving speed of the car 110 through the position sensors in the hoistway, the speed detection module 220 can collect the position information obtained by at least one position sensor in the hoistway, and then obtain the moving speed of the car 110. For example, the speed detection module 220 can collect the times when the car 110 reaches multiple specific positions obtained by multiple position sensors in the hoistway, and then calculate the moving speed of the car 110.

[0064] A star connection test method of the test device 200 in an embodiment of the present disclosure will be described below. Specifically:

[0065] 1) The staff provides a first instruction through the first trigger to enable the star connection module 210 to switch to the test mode. At this time, the star connection module 210 disconnects the three-phase windings 121 of the frequency converter 130 and the permanent magnet synchronous traction machine 120, and shorts the three-phase windings 121 of the permanent magnet synchronous traction machine 120 to make the permanent magnet synchronous traction machine 120 in the star connection state.

[0066] 2) After the duration of the star connection module 210 in the test mode reaches the preset duration, the control module 230 switches to the moving state and outputs a DC signal to release the braking of the braking module 140 (such as a brake) of the elevator 100.

[0067] 3) The car 110 starts to coast, and the speed detection module 220 detects the moving speed of the car 110. When the speed exceeds the preset speed threshold v1, the speed detection module 220 outputs a second instruction. The control module 230 stops outputting the DC signal in response to the second instruction and closes the brake to brake the car 110.

[0068] 4) When it is necessary to test the star connection ability of the permanent magnet synchronous traction machine when the car 110 is at different floors, the staff provides a third instruction through the first trigger mechanism to make the star connection module 210 switch to the operating mode. At this time, the star connection module 210 releases the short circuit of the three-phase windings 121 of the permanent magnet synchronous traction machine 120, and conducts the frequency converter 130 with the three-phase windings 121 of the permanent magnet synchronous traction machine 120. At this time, the permanent magnet synchronous traction machine 120 is powered on, and the power supply line provides a DC signal to the brake, and the brake releases the braking. The staff can control the permanent magnet synchronous traction machine 120 through the frequency converter 130 to drive the car 110 to move to the specified floor.

[0069] Repeating the above steps 1) to 4) can realize the test of the star connection ability of the permanent magnet synchronous traction machine under different floors and different loads, etc., and the operation is very simple.

[0070] It should be noted that the above test method only takes one working mode of the test device 200 of the present disclosure as an example for illustration. The above-mentioned each module can also adopt a working mode different from that in the above example. Specifically, the working mode of each module has been described above, so it will not be repeated here. For example, the control module 230 can also output a DC signal in response to the fourth instruction provided by the staff through the second trigger mechanism.

[0071] The embodiment of the present disclosure also provides an elevator test system, including an elevator and the above-mentioned test device 200.

[0072] By using the elevator test system of the embodiment of the present disclosure, the staff does not need to manually short-circuit the three-phase windings of the permanent magnet synchronous traction machine through cables, nor does it need to observe the car's slipping speed and manually control the brake to brake the elevator, which greatly reduces the dependence on manpower in the star connection test process and improves the convenience of the star connection test.

[0073] Those skilled in the art can understand that the features described in the various embodiments and / or claims of the present disclosure can be combined or combined in various ways, even if such combinations or combinations are not explicitly recorded in the present disclosure. In particular, without departing from the spirit and teaching of the present disclosure, the features described in the various embodiments and / or claims of the present disclosure can be combined and combined in various ways. All such combinations and / or combinations fall within the scope of the present disclosure.

[0074] The embodiments of the present disclosure have been described above. However, these embodiments are for illustrative purposes only and are not intended to limit the scope of the present disclosure. Although the embodiments have been described separately above, this does not mean that the measures in each embodiment cannot be used advantageously in combination. The scope of the present disclosure is defined by the appended claims and their equivalents. Without departing from the scope of the present disclosure, those skilled in the art can make various substitutions and modifications, and all such substitutions and modifications should fall within the scope of the present disclosure.

Claims

1. A testing device for performing a star connection test on an elevator, detachably connected to the elevator, the elevator comprising a car and a permanent magnet synchronous traction machine for driving the car to move in the depth direction of the hoistway, characterized in that, The testing device comprises: A star-sealing module, used to be connected to the permanent magnet synchronous traction machine, wherein the star-sealing module is configured to: in response to a first instruction, switch to a test mode to put the permanent magnet synchronous traction machine in a star-sealing state; A speed detection module, used to be connected to the elevator, wherein the speed detection module is configured to: when the star-sealing module is in the test mode, detect the moving speed of the car, and output a second instruction when the moving speed of the car meets a preset condition; a control module connected to the speed detection module, the control module being further used to be connected to the elevator, the control module being configured to: decelerate the car in response to the second instruction; The elevator further comprises a frequency converter, which is used to provide the driving signal. The star-sealing module includes a gating unit and a short-circuiting unit, the frequency converter is connected to the three-phase winding of the permanent magnet synchronous traction machine through the gating unit, and the short-circuiting unit is connected between the gating unit and the three-phase winding; When the star-sealing module is in the test mode, the gating unit disconnects the frequency converter from the three-phase winding, and a conductive path is formed between the short-circuiting unit and the three-phase winding to short-circuit the three-phase winding; Wherein, the short-circuit unit comprises a three-phase contactor, a first end of the three-phase contactor is connected to the three-phase winding, and a second end of the three-phase contactor is short-circuited; When the star-sealing module is in the test mode, the first end and the second end of the three-phase contactor are connected.

2. The testing device according to claim 1, wherein The star-sealing module is also configured to: in response to a third instruction, switch to an operating mode to release the star-sealing state of the permanent magnet synchronous traction machine, and enable the permanent magnet synchronous traction machine to drive the car to move along the depth direction of the shaft according to a driving signal.

3. The testing device according to claim 2, characterized in that: When the star-sealing module is in the operating mode, the gating unit turns on the inverter and the three-phase winding, and a short circuit is formed between the short-circuiting unit and the three-phase winding.

4. The star isolation test device according to claim 3, characterized in that, When the star-sealing module is in the operating mode, the first end and the second end of the three-phase contactor are disconnected.

5. The testing device according to claim 1, wherein The control module is specifically configured to: in response to the second instruction, switch to a braking state to decelerate the car until it stops moving along the depth direction of the hoistway; and In response to a fourth instruction, the state is switched to a moving state to allow the car to move in a depth direction of the hoistway.

6. The test device according to claim 5, wherein The control module is also configured as: When the duration of the star sealing module being in the test mode reaches a preset duration and the control module does not receive the second instruction, it switches to the motion state.

7. The testing device according to claim 5, characterized in that, The elevator further comprises a braking module, wherein the braking module is configured to: brake the car when no DC signal is received, and release the braking of the car when the DC signal is received; The control module includes a DC power supply. When the control module is in the motion state, the DC power supply outputs the DC signal; when the control module is in the braking state, the DC power supply stops outputting the DC signal.

8. The test device according to claim 7, wherein, The control module further includes an adjustment unit, which is connected to the DC power supply, and the adjustment unit is configured to: adjust the magnitude of the DC signal output by the DC power supply according to the operation of the user.

9. The test device according to claim 1, characterized in that, The speed detection module is specifically configured to: Obtain the moving speed of the car through the encoder on the permanent magnet synchronous traction machine, the speed sensor in the hoistway or the position sensor in the hoistway.

10. An elevator test system, characterized in that, It includes an elevator and the testing device according to any one of claims 1 to 9.

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