Elevator brake release system

Abstract

The present application relates to an elevator brake release system, comprising an electric brake release device and a brake. The elevator brake release system further comprises a speed measuring module and a voltage regulating module. The output end of the electric brake release device is connected to the brake via the voltage regulating module, wherein: the speed measuring module is used to detect the real-time speed of the elevator after the brake is released and output a real-time speed signal to the voltage regulating module; the voltage regulating module is used to adjust the brake voltage output by the electric brake release device to the brake according to the real-time speed signal. Through this application, the problems in the related art of excessive sliding speed after the main engine brake is released, which is prone to accidents and causes panic among passengers in the car, and poor leveling accuracy and lack of safety when stopping due to the high speed are solved. The system is simple to operate, the sliding speed after the brake is released is stable, and the leveling accuracy is high, thereby improving the safety and riding experience of passengers in the elevator.

Description

Technical Field

[0001] The present application relates to the technical field of elevators, and in particular to an elevator brake release system. Background Art

[0002] An elevator brake release device is a brake release rescue device designed to help passengers in situations where a power outage or fault causes the elevator brake to stop outside the door zone, trapping passengers in the car. While ultra-high-speed elevators are becoming increasingly popular with economic development, passenger entrapment in the car is a common occurrence due to power outages, unstable voltage, switch failures, and control system malfunctions.

[0003] To avoid the aforementioned situation, elevator brake release devices in related technologies include mechanical and electric release methods. The mechanical release method uses tools such as a release wrench and a handwheel to release the main engine brake, allowing the elevator to slowly run to the floor and release passengers. However, because ultra-high-speed elevators generally have more brakes than conventional low-speed elevators, and the torque of the brakes and handwheel is excessively large, the mechanical release method often requires the coordination of multiple elevator maintenance personnel, resulting in high labor costs and long rescue times. This makes the elevator brake release cost prohibitive and reduces the passenger experience in the cabin. The electric release method uses an electric release device to power the brake, releasing the main engine brake and allowing the elevator to run to the floor and release passengers. However, the electric release device is manually activated and deactivated by pressing a button, making the release time difficult to control. The constant activation and deactivation of the brakes also results in a poor passenger experience in the cabin and a risk of slipping and stalling. Especially for ultra-high-speed elevators, the main engine power is too large, and the star-sealing current is too large, which can easily damage the main engine and make the star-sealing impossible. Therefore, it is necessary to cancel the star-sealing function and directly use the manual electric brake release method, which causes the car to slide too fast after the main engine brake is released, which can easily cause accidents and panic among the passengers in the car. When stopping, the leveling accuracy is poor due to the high speed and is not safe enough. Summary of the Invention

[0004] In this embodiment, an elevator brake release system is provided to solve the problems in the related art that after the main engine brake is released, the car slides too fast, which is prone to accidents and causes panic among passengers in the car, and the high speed when stopping leads to poor leveling accuracy and lack of safety.

[0005] In this embodiment, an elevator brake release system is provided, comprising an electric brake release device and a brake. The elevator brake release system further comprises a speed measurement module and a voltage regulation module. The output end of the electric brake release device is connected to the brake via the voltage regulation module, wherein:

[0006] The speed measuring module is used to detect the real-time speed of the elevator after the brake is released and output a real-time speed signal to the voltage regulating module;

[0007] The voltage regulating module is used to adjust the brake voltage output by the electric release device to the brake according to the real-time speed signal.

[0008] In some embodiments, the voltage regulating module includes a variable resistor and a resistance adjusting device, the output end of the electric brake release device is connected to the brake via the variable resistor, and the speed measuring module outputs a real-time speed signal to the resistance adjusting device, wherein:

[0009] The resistance adjustment device is used to adjust the resistance value of the variable resistor according to the real-time speed signal;

[0010] The variable resistor is used to adjust the brake voltage output by the electric brake release device to the brake according to the change of its own resistance.

[0011] In some embodiments, the variable resistor includes a sliding resistor, the resistance adjustment device includes a first motor, a first motor adjustment unit, and a first motor power supply, the speed measurement module is connected to the first motor adjustment unit, the first motor power supply is connected to the first motor through the first motor adjustment unit, and the first motor is further connected to the slider of the sliding resistor, wherein:

[0012] The first motor power supply is used to supply power to the first motor;

[0013] The first motor adjustment unit is configured to adjust the direction of rotation of the first motor rotor and the time when the first motor power supply supplies power to the first motor according to the real-time speed signal;

[0014] The first motor is configured to adjust the position of the slider on the sliding rod of the sliding resistor according to the direction of rotation and the power supply time, thereby adjusting the resistance value of the sliding resistor. In some embodiments, the first motor adjustment unit includes a first relay and a second relay, the first motor power supply, the first relay, and the first motor are sequentially connected to form a first power supply circuit, the first motor power supply, the second relay, and the first motor are sequentially connected to form a second power supply circuit, and the speed measurement module outputs a real-time speed signal to the first relay and the second relay, wherein:

[0015] The first relay is energized only when the real-time speed signal indicates that the real-time speed of the elevator is higher than a first speed threshold, so as to turn on the first power supply circuit for controlling the rotor of the first motor to rotate in the forward direction;

[0016] The second relay is energized only when the real-time speed signal indicates that the real-time speed of the elevator is lower than a second speed threshold, so as to turn on the second power supply circuit for controlling the reverse rotation of the rotor of the first motor, and the first speed threshold is not lower than the second speed threshold.

[0017] In some embodiments, the first motor comprises a three-phase motor, the first relay comprises a first contact pair, a second contact pair, and a third contact pair, and the second relay comprises a fourth contact pair, a fifth contact pair, and a sixth contact pair, wherein:

[0018] When the first power supply circuit is turned on, the first contact pair, the second contact pair and the third contact pair are attracted, the first contact pair is used to connect the first phase output port and the first input port of the first motor, the second contact pair is used to connect the second phase output port and the second input port of the first motor, and the third contact pair is used to connect the third phase output port and the third input port of the first motor;

[0019] When the second power supply circuit is turned on, the fourth contact pair, the fifth contact pair and the sixth contact pair are attracted, the fourth contact pair is used to connect the third phase output port and the first input port of the first motor, the fifth contact pair is used to connect the second phase output port and the second input port of the first motor, and the sixth contact pair is used to connect the first phase output port and the third input port of the first motor.

[0020] In some embodiments, the first motor is connected to the slider of the sliding resistor via a flexible connector to control the slider to move along the first direction on the sliding rod, and the slider of the sliding resistor is further connected to a reset member, wherein:

[0021] The reset member is used to control the sliding plate to move along the second direction on the sliding rod, and the first direction is opposite to the second direction.

[0022] In some embodiments, the variable resistor includes a first variable resistor and a second variable resistor, the second variable resistor is connected in parallel at both ends of the brake, the first variable resistor and the second variable resistor are connected in series at the output end of the electric release device, the first variable resistor is used to divide the brake voltage, and the second variable resistor is used to adjust the voltage at both ends of the brake.

[0023] In some embodiments, the elevator release system also includes a transformer, and the output end of the electric release device is connected to the voltage regulating module via the transformer. The brake voltage output by the electric release device after transformation by the transformer includes DC 110V, DC 125V, AC 110V, and AC 220V.

[0024] In some embodiments, a first speed threshold and a second speed threshold are preset in the speed measurement module. When the real-time speed of the elevator is lower than the second speed threshold, the speed measurement module outputs a too-slow speed signal; when the real-time speed of the elevator is higher than the first speed threshold, the speed measurement module outputs an too-fast speed signal; when the real-time speed of the elevator is not lower than the second speed threshold and not higher than the first speed threshold, the speed measurement module does not output a signal, and the second speed threshold is not higher than the first speed threshold; the voltage regulation module adjusts the brake voltage to increase based on the too-slow speed signal; the voltage regulation module adjusts the brake voltage to decrease based on the too-fast speed signal; when the speed measurement module does not output a signal, the voltage regulation module does not adjust the brake voltage.

[0025] In some embodiments, a third speed threshold is preset in the speed measurement module. When the real-time speed of the elevator is higher than the first speed threshold and lower than the third speed threshold, the speed measurement module outputs an excessive speed signal. When the real-time speed of the elevator is not lower than the third speed threshold, the speed measurement module outputs an overspeed signal. The electric release device stops outputting the braking voltage to the brake based on the overspeed signal. The third speed threshold is higher than the first speed threshold.

[0026] In some embodiments, the elevator release system also includes a first timeout protection module, and a fourth speed threshold is preset in the speed measurement module. When the real-time speed of the elevator is higher than the fourth speed threshold and lower than the second speed threshold, the speed measurement module outputs a too slow speed signal. When the real-time speed of the elevator is not higher than the fourth speed threshold, the speed measurement module continues to send a low speed signal to the first timeout protection module. If the duration of the low speed signal exceeds the first time threshold preset by the first timeout protection module, the first timeout protection module controls the electric release device to stop outputting the braking voltage to the brake, and the fourth speed threshold is lower than the second speed threshold.

[0027] In some embodiments, the speed measurement module includes a speed sensor, and the elevator brake release system further includes an encoder, and the encoder is connected to the speed sensor, wherein:

[0028] The encoder is used to generate an encoder pulse signal according to the rotation displacement of the elevator host;

[0029] The speed sensor is used to determine the real-time speed of the elevator after the brake is released according to the encoder pulse signal.

[0030] In some embodiments, the elevator brake release system further includes a star-sealing module, which is connected to an input port of a three-phase winding of the elevator host.

[0031] In some embodiments, the elevator brake release system further includes at least one of a leveling signal detection module and a second timeout protection module, and at least one of the leveling signal detection module and the second timeout protection module is connected to the electric brake release device, wherein:

[0032] The leveling signal detection module is used to control the electric release device to stop outputting voltage after obtaining the elevator's leveling signal;

[0033] The second timeout protection module is used to control the electric brake release device to stop outputting the voltage when the time for the electric brake release device to output the brake voltage exceeds a second time threshold preset by the second timeout protection module.

[0034] Compared to related art, the elevator brake release system provided in this embodiment includes an electric brake release device and a brake. The elevator brake release system also includes a speed measurement module and a voltage regulation module. The output end of the electric brake release device is connected to the brake via the voltage regulation module. The speed measurement module is used to detect the real-time speed of the elevator after brake release and output a real-time speed signal to the voltage regulation module. The voltage regulation module is used to adjust the brake voltage output by the electric brake release device to the brake based on the real-time speed signal. The real-time operating speed of the elevator after brake release is determined by the speed measurement module, and the brake voltage output by the electric brake release device to the brake is adjusted according to the real-time operating speed. The real-time operating speed of the elevator is then controlled by the brake to be within a safe and controllable range. This solves the problems in related art of excessive sliding speed after the main engine brake is released, which can easily cause accidents and panic among passengers in the car, and poor leveling accuracy and lack of safety when stopping due to high speed. The system is simple to operate, has a stable sliding speed after brake release, and has high leveling accuracy, thereby improving the safety and riding experience of passengers in the elevator.

[0035] The details of one or more embodiments of the present application are set forth in the following drawings and description to make other features, objects, and advantages of the present application more readily apparent. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0037] Figure 1 1 is a schematic structural diagram of an elevator brake release system according to an embodiment of the present invention;

[0038] Figure 2 is a structural schematic diagram of an elevator brake release system according to another embodiment of the present invention;

[0039] Figure 3 is a structural schematic diagram of an elevator brake release system according to another embodiment of the present invention;

[0040] Figure 4 is a structural diagram of a resistance adjustment device according to an embodiment of the present invention;

[0041] Figure 5 1 is a schematic structural diagram of a first relay and a second relay according to an embodiment of the present invention;

[0042] Figure 6 1 is a schematic structural diagram of a sliding resistor according to an embodiment of the present invention;

[0043] Figure 7 1 is a schematic structural diagram of a variable resistor according to an embodiment of the present invention;

[0044] Figure 8 1 is a schematic structural diagram of a transformer according to an embodiment of the present invention. DETAILED DESCRIPTION

[0045] In order to more clearly understand the purpose, technical solutions and advantages of the present application, the present application is described and illustrated below in conjunction with the accompanying drawings and embodiments.

[0046] Unless otherwise defined, the technical terms or scientific terms involved in this application should have the general meaning understood by people with ordinary skills in the technical field to which this application belongs. The words "one", "an", "a", "the", "these" and the like in this application do not indicate quantitative restrictions, and they can be singular or plural. The terms "include", "comprise", "have" and any variants thereof involved in this application are intended to cover non-exclusive inclusions; for example, a process, method and system, product or device comprising a series of steps or modules (units) is not limited to the listed steps or modules (units), but may include unlisted steps or modules (units), or may include other steps or modules (units) inherent to these processes, methods, products or devices. The words "connect", "connected", "coupled" and the like involved in this application are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The "plurality" involved in this application refers to two or more. "And / or" describes the relationship between related objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, and B exists alone. Generally, the character " / " indicates that the related objects are in an "or" relationship. The terms "first," "second," "third," etc. used in this application are only used to distinguish similar objects and do not represent a specific ordering of the objects.

[0047] In one embodiment, the elevator release system includes an electric release device and a brake, and also includes a speed measuring module and a voltage regulating module. The output end of the electric release device is connected to the brake via the voltage regulating module, wherein: the speed measuring module is used to detect the real-time speed after the elevator is released and output a real-time speed signal to the voltage regulating module; the voltage regulating module is used to adjust the brake voltage output by the electric release device to the brake according to the real-time speed signal.

[0048] See also Figure 1 , Figure 1 It is a structural diagram of an elevator brake release system according to an embodiment of the present invention.

[0049] For example, the elevator brake release system is the core system for emergency rescue in the event of an elevator power outage or other unexpected event. It generally includes an electric brake release device 100 and a brake 200. The electric brake release device 100 includes components such as a battery, a charging circuit, a boost output circuit, a control circuit, and an operating button. The electric brake release device 100 constantly monitors the presence of mains power. When mains power is available, the device does not operate, and the mains power is used to charge the battery in standby mode. When there is no mains power and an elevator accident occurs, the elevator maintenance personnel input a brake release command to the electric brake release device 100 by pressing the brake release button on the electric brake release device 100. After receiving the brake release command, the electric brake release device 100 outputs a brake voltage to the brake 200 to control the brake 200 to open. Under the combined action of gravity and the brake 200, the elevator enters the brake release downward state and controls the elevator to the leveling position. The electric brake release device 100 is a prior art and is not limited here.

[0050] Exemplarily, the elevator release system also includes a speed measurement module 300 and a voltage regulation module 400. The voltage regulation module 400 is disposed between the electric release device 100 and the brake 200, and is connected to the speed measurement module 300. The speed measurement module 300 is used to collect the real-time speed of the elevator after release and transmit it to the voltage regulation module 400 as a real-time speed signal. The voltage regulation module 400 receives the real-time speed signal and adjusts the brake voltage output by the electric release device 100 to the brake 200 based on the real-time speed signal.

[0051] Specifically, speed measurement module 300 includes a speed sensor. This speed sensor detects the real-time speed of the elevator by sensing the pressure generated during the elevator's descent, the speed of the suspension rope, and the rotational speed of the elevator main unit, generating a sensor signal. This sensor signal is the real-time speed signal. For example, speed measurement module 300 can be a speed sensor connected to an elevator main unit encoder, detecting the current speed of the elevator car by collecting encoder pulse signals. Alternatively, it can be an inductive switch connected to the elevator's speed limiter.

[0052] Specifically, the voltage regulating module 400 includes a voltage regulating resistor to perform voltage division regulation on the output voltage of the electric brake release device 100 ; alternatively, the voltage regulating module 400 may also be configured as a transistor circuit with a voltage regulating function.

[0053] In this embodiment, the elevator release system includes an electric release device and a brake, as well as a speed measurement module and a voltage regulation module. The output end of the electric release device is connected to the brake via the voltage regulation module. The speed measurement module is used to detect the real-time speed of the elevator after the brake is released and output a real-time speed signal to the voltage regulation module; the voltage regulation module is used to adjust the brake voltage output by the electric release device to the brake based on the real-time speed signal. The speed measurement module determines the real-time operating speed of the elevator after the brake is released, and adjusts the brake voltage output by the electric release device to the brake based on the real-time operating speed. The brake is then used to control the real-time operating speed of the elevator within a safe and controllable range. This solves the problem in related arts that after the main engine brake is released, the car slides too fast, which can easily cause accidents and panic among passengers in the car, and the high speed leads to poor leveling accuracy and lack of safety when stopping. The system is simple to operate, has a stable sliding speed after the brake is released, and has high leveling accuracy, thereby improving the safety and riding experience of passengers in the elevator.

[0054] In another embodiment, the voltage regulation module includes a variable resistor and a resistance adjustment device, and the speed measurement module outputs a real-time speed signal to the resistance adjustment device, wherein: the resistance adjustment device is used to adjust the resistance value of the variable resistor according to the real-time speed signal; the variable resistor is used to adjust the electric release device to output a braking voltage to the brake according to the change of its own resistance value.

[0055] See also Figure 2 , Figure 2 It is a structural schematic diagram of an elevator brake release system according to another embodiment of the present invention.

[0056] For example, the voltage regulating module 400 includes a variable resistor 410 and a resistance adjusting device 420. The variable resistor 410 is disposed between the electric brake release device 100 and the brake 200. One end of the resistance adjusting device 420 is connected to the variable resistor 410, and the other end is connected to the speed measuring module 300. The variable resistor 410 is a resistor whose resistance value can change, such as a sliding resistor, a deformation resistor, or a resistor group controlled by a multi-way switch. The resistance adjusting device 420 can adjust the resistance value of the variable resistor 410 by adjusting the resistance change characteristic of the variable resistor 410.

[0057] Exemplarily, the resistance adjustment device 420 obtains the real-time speed signal output by the speed measurement module 300, and adjusts the resistance of the variable resistor 410 based on the real-time speed signal; after the resistance of the variable resistor 410 changes, the brake voltage output by the electric release device 100 to the brake 200 also changes, thereby achieving the adjustment of the brake voltage.

[0058] In one specific embodiment, the variable resistor 410 is a deformation-changing resistor, and the resistance adjustment device 420 is a stepper motor. The stepper motor applies corresponding pressure to the variable resistor 410 according to the real-time speed signal to cause the variable resistor 410 to deform, thereby adjusting the resistance value of the variable resistor 410; in another specific embodiment, the variable resistor 410 is a resistor group with a multi-way switch, and the multi-way switch is turned on or closed based on the real-time speed signal. By switching the multi-way switch, the resistance of the circuit connected to the electric release device is adjusted, thereby changing the brake voltage.

[0059] This embodiment adjusts the brake voltage output by the electric brake release device by setting a variable resistor. The structure is simple and the resistance value of the variable resistor is easy to control, so that the brake voltage required by the brake can be obtained more stably and accurately, thereby improving the accuracy of the elevator brake release system control.

[0060] In another embodiment, the variable resistor includes a sliding resistor, the input end of the resistance adjustment device is connected to the speed measurement module, and the resistance adjustment device is also connected to the slider of the sliding resistor, wherein: the resistance adjustment device is used to adjust the position of the slider on the sliding rod of the sliding resistor according to the real-time speed signal.

[0061] For example, in this embodiment, the variable resistor is set as a sliding resistor, which has a resistance element, a sliding rod and a slider. By adjusting the position of the slider on the sliding rod, the resistance value of the sliding resistor connected to the circuit can be adjusted.

[0062] Exemplarily, the input end of the resistance adjustment device is electrically connected to the speed measurement module for obtaining the real-time speed signal output by the speed measurement module. The resistance adjustment device also forms a mechanical connection with the slider of the sliding resistor, thereby adjusting the position of the slider on the sliding rod according to the real-time speed signal to achieve adjustment of the resistance value of the sliding resistor.

[0063] Specifically, the resistance adjustment device is a stepper motor. In one embodiment, the stepper motor is connected to the slider of the sliding resistor via a hard connector. The rotation of the stepper motor's rotor drives the displacement of the hard connector, thereby generating a thrust or pull on the slider of the sliding resistor, thereby adjusting the slider's position on the sliding rod. In another embodiment, the stepper motor is connected to the slider of the sliding resistor via a soft connector such as a belt. The rotation of the stepper motor's rotor pulls the soft connector to displace the soft connector, thereby generating a pull on the slider of the sliding resistor. The sliding resistor is also provided with a spring, one end of which is fixed to the slider and the other end is fixed to one end of the sliding rod. The spring is used to reset the position of the slider. The soft connector and the spring are used to adjust the slider's position on the sliding rod.

[0064] In another embodiment, the resistance adjustment device includes a first motor, a first motor adjustment unit and a first motor power supply, the speed measurement module is connected to the first motor adjustment unit, the first motor power supply is connected to the first motor through the first motor adjustment unit, and the first motor is also connected to the slider of the sliding resistor, wherein: the first motor power supply is used to power the first motor; the first motor adjustment unit is used to adjust the direction of the first motor rotor and the time when the first motor power supply supplies power to the first motor according to the real-time speed signal; the first motor is used to adjust the position of the slider on the sliding rod of the sliding resistor according to the direction and the power supply time, thereby adjusting the resistance value of the sliding resistor.

[0065] See also Figure 3 , Figure 3 It is a structural schematic diagram of an elevator brake release system according to another embodiment of the present invention.

[0066] For example, Figure 3 As shown, the resistance adjustment device includes a first motor 421, a first motor adjustment unit 422 and a first motor power supply 423. The speed measurement module 300, the first motor adjustment unit 422 and the first motor 421 are electrically connected in sequence. The first motor adjustment unit 422 is also electrically connected to the first motor power supply 423. The first motor 421 is mechanically connected to the slider of the sliding resistor 411.

[0067] Illustratively, the first motor power supply 423 is used to provide electrical energy to the first motor 421, driving the rotor of the first motor 421 to rotate. The first motor adjustment unit 422 is disposed between the first motor 421 and the first motor power supply 423 and is used to control the forward or reverse rotation of the rotor of the first motor 421 and the timing of power supply from the first motor power supply 423 to the first motor 421 based on the real-time speed signal output by the speed measurement module 300. The first motor 421 is mechanically connected to the slider of the sliding resistor 411, thereby controlling the position of the slider on the sliding rod by the forward or reverse rotation of the rotor of the first motor 421 and the power supply timing.

[0068] Specifically, when the release button of the electric brake release device is manually pressed, the electric brake release device outputs a brake voltage to the brake. After the elevator starts to slip, the speed measurement module detects the real-time speed of the elevator after slipping and outputs a real-time speed signal. When the real-time speed exceeds a set safety limit (for example, 0.15-0.4 m / s), the first motor adjustment unit controls the power supply to the first motor based on the real-time speed signal, and further adjusts the position of the sliding resistor to change the resistance of the sliding resistor, thereby reducing the brake voltage output by the electric brake release device and the elevator's slipping speed.

[0069] In this embodiment, a first motor is provided to adjust the resistance of the sliding resistor, and the rotation direction and rotation time of the first motor rotor are controlled by the first motor adjustment unit. The resistance adjustment method of the sliding resistor is simple and easy to control, thereby reducing the hardware cost of the elevator release system.

[0070] In another embodiment, the first motor adjustment unit includes a first relay and a second relay, the first motor power supply, the first relay, and the first motor are sequentially connected to form a first power supply circuit, the first motor power supply, the second relay, and the first motor are sequentially connected to form a second power supply circuit, and the speed measurement module outputs a real-time speed signal to the first relay and the second relay, wherein:

[0071] The first relay is energized only when the real-time speed signal indicates that the real-time speed of the elevator is higher than a first speed threshold, so as to turn on the first power supply circuit to control the rotor of the first motor to rotate in the forward direction;

[0072] The second relay is energized only when the real-time speed signal indicates that the real-time speed of the elevator is lower than the second speed threshold, so as to turn on the second power supply circuit for controlling the reverse rotation of the rotor of the first motor, and the first speed threshold is not lower than the second speed threshold.

[0073] See also Figure 4 , Figure 4 2 is a schematic structural diagram of a resistance adjustment device according to an embodiment of the present invention.

[0074] For example, Figure 4 As shown, the first motor adjustment unit 422 includes a first relay JDQ1 and a second relay JDQ2. The speed measurement module 300 is connected to the first motor 421 via the first relay JDQ1 or the second relay JDQ2. The first and second relays JDQ1 and JDQ2 are also connected to the first motor power supply 423. When the elevator's real-time speed exceeds a first speed threshold, the first relay JDQ1 is energized, and the first motor power supply 423 and the first motor 421 are connected via the first relay JDQ1. This activates the first power supply circuit, causing the first motor 421 to rotate in the forward direction. When the elevator's real-time speed falls below a second speed threshold, the second relay JDQ2 is energized, and the first motor power supply 423 and the first motor 421 are connected via the second relay JDQ2. This activates the second power supply circuit, causing the first motor 421 to rotate in the reverse direction. The first speed threshold is not lower than the second speed threshold. The threshold interval formed by the first and second speed thresholds represents the safe range of the elevator's real-time speed after the brake is released. When the real-time speed of the elevator is within a safe range, the first relay JDQ1 and the second relay JDQ2 are not energized, the first motor 421 stops rotating due to power failure, and the resistance value of the sliding resistor stops changing.

[0075] Specifically, the first relay JDQ1 and the second relay JDQ2 control the direction of the input current of the first motor 421 , thereby switching the forward rotation and reverse rotation of the rotor of the first motor 421 .

[0076] Specifically, when the speed measuring module 300 detects that the real-time speed of the elevator is too fast after the brake is released, the speed measuring module 300 outputs a first level signal, so that the first relay JDQ1 is energized, the first motor 421 is connected to the circuit of the first motor power supply 423, and the rotor of the first motor 421 rotates forward to adjust the resistance of the sliding resistor 411 until the real-time speed of the elevator is within a safe range, and the first motor 421 stops rotating; when the speed measuring module 300 detects that the real-time speed of the elevator is too slow after the brake is released, the speed measuring module 300 outputs a second level signal, so that the second relay JDQ2 is energized, the first motor 421 is connected to the circuit of the first motor power supply 423, and the rotor of the first motor 421 rotates reversely to adjust the resistance of the sliding resistor 411 until the real-time speed of the elevator is within a safe range, and the first motor 421 stops rotating.

[0077] In this embodiment, the first motor adjustment unit is configured as a first relay and a second relay, which respectively control the forward rotation and reverse rotation of the first motor through the first relay and the second relay, thereby adjusting the position of the slider, thereby controlling the resistance value of the sliding resistor. The control method is simple and stable, and there is no need to use complex transistor circuits or other solutions to achieve switching of the input current direction of the first motor, thereby reducing the hardware cost of the elevator release system.

[0078] In another embodiment, the speed measurement module 300 is preset with a first speed threshold and a second speed threshold. When the elevator's running speed is detected to be lower than the second speed threshold, a speed too slow signal is output. When the elevator's running speed is detected to be higher than the first speed threshold, a speed too fast signal is output. When the elevator's running speed is detected to be between the first speed threshold and the second speed threshold (including the first speed threshold and the second speed threshold), no signal is output, and the second speed threshold is not higher than the first speed threshold. The voltage regulating module adjusts the brake voltage based on the speed too slow signal to increase the brake release amplitude, thereby increasing the elevator's sliding speed; the voltage regulating module adjusts the brake voltage based on the speed too fast signal to decrease the brake release amplitude, thereby reducing the elevator's sliding speed; when the speed measurement module does not output a signal, the voltage regulating module does not adjust the brake voltage, and the brake release amplitude remains unchanged.

[0079] Specifically, the speed measurement module 300 may include a speed sensor connected to the encoder of the elevator host. The speed sensor is provided with a second speed threshold, such as 0.05 m / s, and a first speed threshold, such as 0.15 m / s. The speed sensor can calculate the running speed of the elevator by receiving the pulse signal from the encoder. When the running speed of the elevator is less than 0.05 m / s, the speed sensor outputs a too slow speed signal. When the running speed of the elevator is greater than 0.15 m / s, the speed sensor outputs an too fast speed signal. When the running speed of the elevator is not less than 0.05 m / s and not greater than 0.15 m / s, no signal is output.

[0080] In another specific embodiment, the speed measurement module 300 further includes a preset third speed threshold. When the elevator's operating speed is detected to be higher than the first speed threshold and lower than the third speed threshold, an overspeed signal is output. When the elevator's operating speed is detected to be no lower than the third speed threshold, an overspeed signal is output to the electric brake release device, which is triggered to stop outputting voltage. The third speed threshold is higher than the first speed threshold.

[0081] Specifically, the speed measurement module 300, for example, is also provided with a third speed threshold value, for example, 0.4 m / s, in the speed sensor. When the elevator running speed obtained by the speed sensor is greater than 0.15 m / s and less than 0.4 m / s, an overspeed signal is output. When the obtained elevator running speed is greater than or equal to 0.4 m / s, an overspeed signal is output to the electric release device, that is, the running speed of the elevator is too fast after the brake is released, and the electric release device is controlled to stop supplying power to the brake, and the brake is applied to stop the elevator.

[0082] In another embodiment, the motor includes a three-phase motor, the first relay includes a first contact pair, a second contact pair and a third contact pair, and the second relay includes a fourth contact pair, a fifth contact pair and a sixth contact pair, wherein: when the real-time speed of the elevator is higher than the first speed threshold, the first contact pair, the second contact pair and the third contact pair are energized, the first contact pair is used to connect the first phase output port and the first input port of the first motor, the second contact pair is used to connect the second phase output port and the second input port of the first motor, and the third contact pair is used to connect the third phase output port and the third input port of the first motor; when the real-time speed of the elevator is lower than the second speed threshold, the fourth contact pair, the fifth contact pair and the sixth contact pair are energized, the fourth contact pair is used to connect the third phase output port and the first input port of the first motor, the fifth contact pair is used to connect the second phase output port and the second input port of the first motor, and the sixth contact pair is used to connect the first phase output port and the third input port of the first motor.

[0083] See also Figure 5 , Figure 51 is a schematic structural diagram of a first relay and a second relay according to an embodiment of the present invention.

[0084] For example, in this embodiment, the first motor is configured as a three-phase motor. A three-phase motor is an AC motor driven by three-phase AC power. When the three-phase stator windings of a three-phase motor are connected to three AC power sources with a phase difference of 120 degrees, a rotating magnetic field is generated. This rotating magnetic field cuts through the stator windings, driving the rotor to rotate.

[0085] Specifically, when the input currents of any two phases of a three-phase motor are switched, the motor's rotating magnetic field reverses, and the direction of the rotor's rotation also changes accordingly. To achieve this, by configuring the first relay JDQ1 and the second relay JDQ2 so that when the first relay JDQ1 is engaged and the second relay JDQ2 is engaged, the input currents of any two phases of the three-phase motor are swapped, enabling forward and reverse rotation switching of the three-phase motor.

[0086] Specifically, in this embodiment, the first relay JDQ1 is provided with three contact pairs, namely, a first contact pair J1, a second contact pair J2, and a third contact pair J3. When the real-time speed of the elevator exceeds the first speed threshold, the first relay JDQ1 is energized, i.e., the first contact pair J1, the second contact pair J2, and the third contact pair J3 are energized. The first contact pair J1 is used to connect the first phase output port (L1 port) and the first input port (U port) of the first motor 421. The second contact pair J2 is used to connect the second phase output port (L2 port) and the second input port (V port) of the first motor 421. The third contact pair J3 is used to connect the third phase output port (L3 port) and the third input port (W port) of the first motor 421. At this time, the first motor 421 rotates in the forward direction.

[0087] Specifically, in this embodiment, the second relay JDQ2 is provided with three contact pairs, namely, the fourth contact pair J4, the fifth contact pair J5, and the sixth contact pair J6. When the real-time speed of the elevator is lower than the second speed threshold, the second relay JDQ2 is energized, i.e., the fourth contact pair J4, the fifth contact pair J5, and the sixth contact pair J6 are energized. The fourth contact pair J4 is used to connect the third phase output port (L3 port) and the first input port (U port) of the first motor 421. The fifth contact pair J5 is used to connect the second phase output port (L2 port) and the second input port (V port) of the first motor 421. The sixth contact pair J6 is used to connect the first phase output port (L1 port) and the third input port (W port) of the first motor 421. At this time, because the phases of the input currents of the first input port and the third input port of the first motor 421 are swapped, the first motor 421 rotates in the opposite direction.

[0088] In this embodiment, multiple contact pairs are respectively set in the first relay and the second relay, and the connection relationship between each contact pair and the phase output port and the motor input port is set, so that when the first relay is in the energized state, compared with when the second relay is in the energized state, the input currents of the two phases of the first input port and the third input port of the first motor of the two are swapped, thereby switching the rotation direction of the motor rotor. The control method and the setting method of the contact pairs are simple, thereby reducing the hardware cost of the elevator release system.

[0089] In another embodiment, the first motor is connected to the slider of the sliding resistor through a flexible connector to control the slider to move along the first direction on the sliding rod. The slider of the sliding resistor is also connected to a reset member, wherein: the reset member is used to reset the position of the slider of the sliding resistor and control the slider to move along the second direction on the sliding rod, and the first direction is opposite to the second direction.

[0090] See also Figure 6 , Figure 6 1 is a schematic structural diagram of a sliding resistor according to an embodiment of the present invention.

[0091] For example, the first motor is mechanically connected to the slider of the sliding resistor via a flexible connector. The slider of the sliding resistor is further connected to a reset element, which is used to reset the position of the slider of the sliding resistor. The flexible connector and the reset element jointly apply a tensile force to the slider to adjust the position of the slider on the sliding rod. The flexible connector can be configured as a belt or other connector, and the reset element can be configured as a spring or other reset element.

[0092] Specifically, when the rotor of the first motor rotates forward, the reel of the first motor retracts the belt, pulling the slider of the sliding resistor and the spring to move in the first direction, so that the resistance value of the sliding resistor connected to the circuit increases; when the rotor of the first motor rotates reversely, the reel of the first motor releases the belt, and the spring pulls the slider of the sliding resistor to reset in the second direction, so that the resistance value of the sliding resistor connected to the resistor decreases.

[0093] In another embodiment, the variable resistor includes a first variable resistor and a second variable resistor, the second variable resistor is connected in parallel at both ends of the brake, the first variable resistor and the second variable resistor are connected in series at the output end of the electric release device, the first variable resistor is used to divide the brake voltage, and the second variable resistor is used to adjust the voltage at both ends of the brake.

[0094] See also Figure 7 , Figure 7 FIG. 1 is a schematic structural diagram of a variable resistor according to an embodiment of the present invention.

[0095] For example, Figure 7As shown, port A and port B are the output ports of the electric brake release device respectively. The first resistor R1 is connected to port A, and the other end is connected to the second resistor R2 and the brake 200. One end of the second resistor R2 is connected to the first resistor R1, and the other end is connected to the brake 200. Figure 7 In the current loop formed by the A port and the B port, the first resistor R1 is disposed in the current main circuit, and the second resistor R2 is disposed in the current branch circuit and connected in parallel with the brake 200 .

[0096] Specifically, the first resistor R1 and the second resistor R2 can both be configured as sliding resistors. After the first motor is connected to the first motor power supply, the slider positions of the first resistor R1 and the second resistor R2 are adjusted to change the resistance values ​​of the first resistor R1 and the second resistor R2, thereby changing the terminal voltages of the first resistor R1 and the second resistor R2. It will be understood that the sum of the terminal voltages of the first resistor R1 and the second resistor R2 is the voltage difference between port A and port B, and the terminal voltage of the second resistor R2 is equal to the input voltage of the brake 200.

[0097] In this embodiment, a first resistor and a second resistor are provided, and the first resistor and the second resistor are driven by a first motor to adjust the resistance value. The braking voltage of the input brake is adjusted according to the resistance value relationship between the first resistor and the second resistor. The control method is simple and easy to implement, thereby reducing the hardware cost of the elevator release system.

[0098] In another embodiment, the first resistor R1 can be a fixed resistor or a variable resistor, and only serves as a voltage divider. The second resistor R2 is a sliding resistor connected to the first motor. After the first motor is connected to the first motor power supply based on the real-time speed signal sent by the speed measurement module, the position of the sliding plate of the second resistor R2 is adjusted, thereby adjusting the input voltage of the brake 200.

[0099] In another embodiment, the elevator brake release system further includes a transformer, and the output end of the electric brake release device is connected to the voltage regulating module via the transformer.

[0100] See also Figure 8 , Figure 8 1 is a schematic structural diagram of a transformer according to an embodiment of the present invention.

[0101] For example, Figure 8 As shown, a transformer is further provided between the electric brake release device and the voltage regulating module for transforming the brake voltage output by the electric brake release device.

[0102] Specifically, the transformer's input has two input ports, L and N, which are connected to the two output ports of the electric brake release device. The transformer receives the output voltage of the electric brake release device and transforms it. The transformer's output voltage includes, but is not limited to, 110V DC, 125V DC, 110V AC, and 220V AC, to accommodate brakes with different electrical parameters. When the user connects a CPA (air switch), the L and N ports are connected to the electric brake release device, and the transformer transforms the output voltage of the electric brake release device to obtain a brake voltage suitable for different brakes.

[0103] The elevator brake release system in this embodiment includes a transformer, which adjusts the brake voltage output by the electric brake release device through the transformer, thereby improving the accuracy of the brake voltage and the adaptability with brakes of different specifications, thereby improving the accuracy of the elevator brake release system control and the wide application.

[0104] In another embodiment, the elevator brake release system further includes an encoder connected to a speed measurement module, wherein: the encoder is configured to generate an encoder pulse signal based on the rotational displacement of the elevator main unit; and the speed measurement module is configured to determine the real-time speed after brake release based on the encoder pulse signal. The speed measurement module includes a speed sensor.

[0105] For example, the elevator brake release system also includes an encoder, one end of which is connected to the elevator main unit and the other end to a speed sensor. The encoder generates an encoder pulse signal based on the elevator main unit's rotational displacement and sends it to the speed sensor, which receives and analyzes the encoder pulse signal to determine the elevator's operating speed. An encoder is a sensor that converts displacement into a series of digital pulse signals and can be used to measure rotational or linear displacement.

[0106] In this embodiment, an encoder is used to collect the displacement of the elevator and generate an encoder pulse signal. The speed sensor obtains the real-time speed signal of the elevator after the brake is released based on the encoder pulse signal. The encoder has the advantages of accurate positioning, high control precision, easy installation, and long service life, thereby improving the accuracy of speed detection after the elevator brake is released and reducing the hardware cost of the elevator brake release system.

[0107] In another embodiment, the elevator brake release system further includes a star-sealing module, which is connected to an input port of the three-phase winding of the elevator host.

[0108] For example, the elevator release system also includes a star-blocking module. Its three-phase interfaces are connected to the input ports of the three-phase windings of the elevator main unit to achieve three-phase input. The star-blocking module can be configured as a contactor for the elevator main unit, providing overspeed protection. When the elevator is running too fast, the star-blocking module enters the released state, short-circuiting the three-phase windings of the elevator main unit to control the input voltage. The star-blocking module can work together with the voltage regulator module to reduce the elevator's operating speed after the release of the brake.

[0109] In this embodiment, overspeed protection is performed through a star-sealing module, which has the advantages of large control capacity, suitability for frequent operations and remote control, thereby increasing the application scenarios of the elevator release system and having a wider applicability, while also improving the safety of the elevator release process.

[0110] In another embodiment, the elevator release system also includes a leveling signal detection module and at least one of a second timeout protection module, and at least one of the leveling signal detection module and the second timeout protection module are connected to the electric release device, wherein: the leveling signal detection module is used to control the electric release device to stop outputting voltage after obtaining the leveling signal of the elevator; the second timeout protection module is used to control the electric release device to stop outputting voltage when the time for the electric release device to output the braking voltage exceeds a second preset time threshold.

[0111] Illustratively, in this embodiment, the elevator brake release system is further provided with at least one of a leveling signal detection module and a second timeout protection module.

[0112] In one specific embodiment, the elevator brake release system further includes a leveling signal detection module. The leveling signal detection module is connected to the electric brake release device and is configured to obtain the elevator's leveling signal. Upon receiving the leveling signal, the module controls the electric brake release device to stop outputting the brake voltage. The leveling signal detection module includes the elevator's electrical control switch, which is configured to issue the elevator's leveling signal.

[0113] Specifically, the leveling signal detection module can be implemented through the existing leveling photoelectric switch on the elevator, and leveling detection can be achieved through the photosensitive device of the leveling photoelectric switch; alternatively, the leveling signal detection module can also be set as an additional leveling photoelectric switch or magnetic switch.

[0114] Specifically, when the leveling signal detection module detects a leveling signal, it sends a control command to the electric brake release device. Upon receiving the control command, the electric brake release device stops outputting the brake voltage. Optionally, if the elevator needs to continue running to escape leveling, the release button on the electric brake release device can be manually pressed again.

[0115] In another specific embodiment, the elevator brake release system is further provided with a second timeout protection module, which is connected to the electric brake release device and is configured to determine whether the time during which the electric brake release device outputs the brake voltage exceeds a second preset time threshold. If so, the electric brake release device is controlled to stop outputting the brake voltage to the brake. The second preset time threshold can be manually set.

[0116] Specifically, the second timeout protection module can be configured as a binary dial-operated time relay. When the electric release device begins outputting a holding voltage to the brake, the time relay begins counting. When the release time exceeds a set second time threshold, the time relay shuts off the voltage output to the electric release device. For example, if an elevator's circuit is disconnected, causing hardware failure, or if the elevator is in a balanced state with the car and counterweight, preventing movement, continued output of the holding voltage to the brake could cause the elevator to remain released for an extended period, potentially damaging the brake or other hardware.

[0117] In another specific embodiment, a fourth speed threshold is further provided in the speed measurement module, and the fourth speed threshold is less than the second speed threshold. When the real-time speed of the elevator is higher than the fourth speed threshold and lower than the second speed threshold, the speed measurement module outputs a too-slow speed signal. When the speed measurement module detects that the real-time speed of the elevator is not higher than the fourth speed threshold, it continuously sends a low-speed signal to the first timeout protection module. The first timeout protection module starts timing from the receipt of the low-speed signal. If the reception time exceeds a first preset time threshold, the electric release device is controlled to stop outputting a braking voltage to the brake. If the running speed of the elevator is not lower than the fourth speed threshold, the speed measurement module stops outputting the low-speed signal to the first timeout protection module, and the first timeout protection module stops timing and resets the time.

[0118] Specifically, the first timeout protection module can be a time relay, and the speed measurement module can be a speed sensor. When the speed sensor detects that the speed of the elevator is less than the fourth speed threshold, such as 0.01m / s, the speed sensor will continue to output a low-speed signal to the time relay, and the time relay will start timing from the receipt of the low-speed signal. When the time exceeds its preset low-speed time threshold, such as 15s, the time relay will cut off the voltage output of the electric release device. If the speed detected by the speed sensor is not less than the fourth speed threshold before the second preset time threshold is reached, the speed sensor stops outputting a low-speed signal to the time relay, and the time relay stops timing and resets to zero until the next time a low-speed signal is received and timing is restarted. This setting prevents the electric release device from still outputting voltage when the elevator is basically not moving, resulting in long-term power supply to the brake, causing the brake to heat up and be damaged. The first timeout protection module and the second timeout protection module can be the same.

[0119] In this embodiment, at least one of a leveling signal detection module and a timeout protection module is provided in the elevator release system, wherein the leveling signal detection module is used to determine whether the elevator has reached the leveling floor during the elevator release operation, and the timeout protection module is used to monitor the total release time and low-speed operation time of the elevator and cut off the power supply of the electric release device to the brake when the total release time or the low-speed operation time is too long, thereby improving the safety of elevator release.

[0120] In another embodiment, to assist in explaining the working processes of the various components of the elevator brake release system in this embodiment, the present invention further discloses a working process of the elevator brake release system.

[0121] For example, in order to prevent erroneous operation when there is mains input, the elevator brake release system enters the working state only when the mains or the peripheral circuit is disconnected.

[0122] After the staff presses the release button (two or more release buttons can be set to prevent misoperation and reduce the risk of adhesion), the electric release device detects whether there is mains input. If there is no mains input, it enters the working state;

[0123] The electric release device first controls the action of the star-sealing module, which short-circuits the three phases of the elevator host and outputs the brake voltage. The timeout protection module starts timing the release time.

[0124] The running speed of the elevator is 0 at the beginning, which is lower than the fourth speed threshold and the second speed threshold preset in the speed measurement module. On the one hand, the speed measurement module outputs a too slow speed signal to the second relay, and the second relay is energized and energized, turning on the circuit in which the first motor power supply supplies power to the first motor, so that the first motor is energized and rotates, driving the slider of the sliding resistor to move, adjusting the resistance of the sliding resistor, and thus adjusting the braking voltage output to the brake, releasing the brake and adjusting the opening and closing amplitude so that the elevator starts to slide at a low speed; on the other hand, the speed measurement module also outputs a low speed signal to the timeout protection module, but before reaching the first time threshold preset by the timeout protection module, the running speed of the elevator will be greater than the fourth speed threshold, so the timeout protection module stops timing the low-speed running time and resets it to zero;

[0125] As the sliding resistance is adjusted, the elevator's running speed continues to increase. The speed measurement module detects the elevator's running speed in real time. When the elevator's running speed reaches the second speed threshold, the speed measurement module no longer outputs a signal, the power supply circuit of the first motor is disconnected, and the first motor stops rotating. The sliding resistance stops changing, and the brake voltage output by the electric release device to the brake is fixed. The brake is released with a fixed opening and closing amplitude, and the elevator continues to slide under the action of gravity.

[0126] When the running speed of the elevator is greater than the first speed threshold, the speed measuring module outputs an overspeed signal to the first relay, the first relay is energized and energized, and the circuit for supplying power to the first motor is turned on, so that the first motor is energized and rotates, driving the slider of the sliding resistor to move in the opposite direction, adjusting the resistance of the sliding resistor, and thus adjusting the brake voltage output to the brake. The brake reduces the opening and closing amplitude, thereby reducing the running speed of the elevator until it drops below the first speed threshold. The speed measuring module no longer outputs a signal, the power supply circuit of the first motor is disconnected and stops rotating, and the resistance of the sliding resistor stops changing. At this time, the brake voltage output to the brake by the electric release device is a fixed value, and the brake is released with a fixed opening and closing amplitude. In this way, the resistance of the variable resistor is adaptively adjusted, thereby adjusting the brake voltage to adjust the sliding speed of the elevator.

[0127] During the elevator slipping process, when the leveling signal detection module detects the leveling signal, it sends a control command to the electric brake release device. After receiving the control command, the electric brake release device stops outputting the braking voltage to the brake, and the brake is engaged to stop the elevator.

[0128] If the elevator's slipping speed exceeds the third speed threshold and cannot be reduced, the speed measurement module outputs an overspeed signal to the electric release device, which is triggered to stop outputting voltage and the brake is applied to stop the elevator.

[0129] If the elevator's slipping speed continues to be lower than the fourth speed threshold and reaches the first time threshold preset by the timeout protection module, the timeout protection module controls the electric release device to stop outputting the braking voltage to the brake, and the brake is applied to stop the elevator.

[0130] If the release time reaches the second time threshold preset by the timeout protection module, the timeout protection module controls the electric release device to stop outputting the brake voltage to the brake, and the brake is engaged to stop the elevator.

[0131] For example, if the elevator needs to be released from the leveling floor again, the release button needs to be pressed again manually.

[0132] It should be understood that the specific embodiments described herein are only used to explain this application and are not used to limit it. Based on the embodiments provided in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0133] Obviously, the accompanying drawings are merely examples or embodiments of the present application. A person skilled in the art can also apply the present application to other similar situations based on these drawings without inventive effort. Furthermore, it is understandable that, although the work involved in this development process may be complex and lengthy, certain design, manufacturing, or production changes based on the technical content disclosed in this application are merely routine technical means for a person skilled in the art and should not be considered to constitute a deficiency in the disclosure of the present application.

[0134] The term "embodiment" as used in this application refers to specific features, structures, or characteristics described in conjunction with the embodiment that can be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily mean that the embodiment is the same, nor does it mean that it is mutually exclusive with other embodiments and is independent or optional. It is understood, either explicitly or implicitly, by those skilled in the art that the embodiments described in this application can be combined with other embodiments when there is no conflict.

[0135] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of patent protection. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present application shall be determined by the appended claims.

Claims

1. An elevator brake release system, comprising an electric brake release device and a brake, characterized in that: The elevator brake release system further includes a speed measurement module and a voltage regulation module, and the output end of the electric brake release device is connected to the brake via the voltage regulation module, wherein: The speed measuring module is used to detect the real-time speed of the elevator after the brake is released and output a real-time speed signal to the voltage regulating module; The voltage regulating module is used to adjust the brake voltage output by the electric brake release device to the brake according to the real-time speed signal; The speed measuring module is preset with a first speed threshold and a second speed threshold. When the real-time speed of the elevator is lower than the second speed threshold, the speed measuring module outputs a too-slow speed signal. When the real-time speed of the elevator is higher than the first speed threshold, the speed measuring module outputs an too-fast speed signal. When the real-time speed of the elevator is not lower than the second speed threshold and not higher than the first speed threshold, the speed measuring module does not output a signal, and the second speed threshold is not higher than the first speed threshold. The voltage regulating module increases the brake voltage based on the too-slow speed signal and decreases the brake voltage based on the too-fast speed signal. When the speed measuring module does not output a signal, the voltage regulating module does not adjust the brake voltage. The voltage regulating module includes a variable resistor and a resistance adjusting device, and the speed measuring module outputs a real-time speed signal to the resistance adjusting device, wherein: The resistance adjustment device is used to adjust the resistance value of the variable resistor according to the real-time speed signal; The variable resistor is used to adjust the brake voltage output by the electric brake release device to the brake according to the change of its own resistance; Among them, the variable resistor includes a sliding resistor; the resistance adjustment device is connected to the slider of the sliding resistor; the resistance adjustment device is also used to adjust the position of the slider on the sliding rod of the sliding resistor according to the real-time speed signal, thereby adjusting the resistance value of the sliding resistor.

2. The elevator brake release system according to claim 1, characterized in that: The resistance adjustment device includes a first motor, a first motor adjustment unit, and a first motor power supply. The speed measurement module is connected to the first motor adjustment unit. The first motor power supply is connected to the first motor through the first motor adjustment unit. The first motor is also connected to the slider of the sliding resistor, wherein: The first motor power supply is used to supply power to the first motor; The first motor adjustment unit is configured to adjust the direction of rotation of the first motor rotor and the time when the first motor power supply supplies power to the first motor according to the real-time speed signal; The first motor is used to adjust the position of the slider on the sliding rod of the sliding resistor according to the direction of rotation and the power supply time, thereby adjusting the resistance value of the sliding resistor.

3. The elevator brake release system according to claim 2, characterized in that: The first motor adjustment unit includes a first relay and a second relay, the first motor power supply, the first relay and the first motor are sequentially connected to form a first power supply circuit, the first motor power supply, the second relay and the first motor are sequentially connected to form a second power supply circuit, and the speed measurement module outputs a real-time speed signal to the first relay and the second relay, wherein: The first relay is energized only when the real-time speed signal indicates that the real-time speed of the elevator is higher than a first speed threshold, so as to turn on the first power supply circuit for controlling the rotor of the first motor to rotate in the forward direction; The second relay is energized only when the real-time speed signal indicates that the real-time speed of the elevator is lower than a second speed threshold, so as to turn on the second power supply circuit for controlling the reverse rotation of the rotor of the first motor, and the first speed threshold is not lower than the second speed threshold.

4. The elevator brake release system according to claim 2, characterized in that: The first motor is connected to the slider of the sliding resistor via a flexible connector to control the slider to move along the first direction on the sliding rod. The slider of the sliding resistor is also connected to the reset member, wherein: The reset member is used to control the sliding plate to move along the second direction on the sliding rod, and the first direction is opposite to the second direction.

5. The elevator brake release system according to claim 1, characterized in that: The variable resistor includes a first variable resistor and a second variable resistor, the second variable resistor is connected in parallel at both ends of the brake, the first variable resistor and the second variable resistor are connected in series at the output end of the electric release device, the first variable resistor is used to divide the brake voltage, and the second variable resistor is used to adjust the voltage at both ends of the brake.

6. The elevator brake release system according to claim 1, characterized in that: The elevator release system also includes a transformer, and the output end of the electric release device is connected to the voltage regulation module via the transformer. The brake voltage output by the electric release device after transformation by the transformer includes DC 110V, DC 125V, AC 110V, and AC 220V.

7. The elevator brake release system according to claim 1, characterized in that: A third speed threshold is also preset in the speed measurement module. When the real-time speed of the elevator is higher than the first speed threshold and lower than the third speed threshold, the speed measurement module outputs an excessive speed signal. When the real-time speed of the elevator is not lower than the third speed threshold, the speed measurement module outputs an overspeed signal. The electric release device stops outputting the braking voltage to the brake based on the overspeed signal. The third speed threshold is higher than the first speed threshold.

8. The elevator brake release system according to claim 1, characterized in that: The elevator release system also includes a first timeout protection module, and a fourth speed threshold is preset in the speed measurement module. When the real-time speed of the elevator is higher than the fourth speed threshold and lower than the second speed threshold, the speed measurement module outputs a too-slow speed signal. When the real-time speed of the elevator is not higher than the fourth speed threshold, the speed measurement module continues to send a low-speed signal to the first timeout protection module. If the duration of the low-speed signal exceeds the first time threshold preset by the first timeout protection module, the first timeout protection module controls the electric release device to stop outputting the braking voltage to the brake, and the fourth speed threshold is less than the second speed threshold.

9. The elevator brake release system according to any one of claims 7 to 8, characterized in that: The speed measurement module includes a speed sensor, and the elevator brake release system further includes an encoder, and the encoder is connected to the speed sensor, wherein: The encoder is used to generate an encoder pulse signal according to the rotation displacement of the elevator host; The speed sensor is used to determine the real-time speed of the elevator after the brake is released according to the encoder pulse signal.

10. The elevator brake release system according to claim 1, characterized in that: The elevator brake release system further includes a star-sealing module, which is connected to an input port of a three-phase winding of the elevator host.

11. The elevator brake release system according to claim 1, characterized in that: The elevator brake release system further includes at least one of a leveling signal detection module and a second timeout protection module, and at least one of the leveling signal detection module and the second timeout protection module is connected to the electric brake release device, wherein: The leveling signal detection module is used to control the electric release device to stop outputting voltage after obtaining the elevator's leveling signal; The second timeout protection module is used to control the electric brake release device to stop outputting the voltage when the time for the electric brake release device to output the brake voltage exceeds a second time threshold preset by the second timeout protection module.

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