TW202229150A - Elevator control module for automatic rescue - Google Patents

Abstract

The present invention provides an elevator control module comprising a switch, a first detector and a processor. The processor controls the switch to switch from an general mode to a short circuit mode in response to that the inverter meets a predetermined condition. The processor then turns off the brake, and then activates the brake according to a first signal generated by the first detector, so as to ensure that the elevator car can accurately reach the destination position and the safety and comfort of passengers when executing an automatic rescue.

Description

Elevator control module with automatic rescue function

The present invention relates to an elevator control module, in particular to an elevator control module that can perform automatic rescue.

When the elevator system encounters emergency situations such as inverter damage or overcurrent fault, because the inverter loses control of the motor rotor, it is necessary to brake the rotor with a brake to prevent the elevator car from rushing or falling. At this time, because the elevator car cannot move, passengers will be trapped in the car, waiting for rescuers to rescue them manually.

In the face of emergency situations where passengers are trapped, if the rescue is carried out with the known technology, the elevator car may not reach the destination accurately, causing the passengers to fall and other dangers when they leave the elevator car; in addition, if the rescue is carried out with the known technology, It is also possible that the elevator car moves too fast, causing passengers to fall or collide in the elevator car and be injured, or make passengers feel uncomfortable and fearful.

In view of this, one of the objectives of the present invention is to provide an elevator control module, which can automatically rescue passengers in the elevator car in the event of an emergency situation such as damage to the inverter or an overcurrent fault.

Another object of the present invention is to ensure that the elevator control module provided by the elevator car can accurately reach the destination position when performing automatic rescue, so as to avoid the danger of passengers falling.

Another object of the present invention is to ensure that the elevator control module provided by the invention prevents the elevator car from moving too fast when performing automatic rescue, so as to take into account the safety and comfort of passengers.

In order to achieve the above object, the present invention provides a kind of elevator control module, in order to control an elevator system, this elevator system includes a carriage, a motor, a frequency converter and a brake, this motor includes a rotor, stator and set The plurality of windings on the stator are used to drive the carriage, the frequency converter is coupled to each of the windings to drive the rotor, the brake is used to brake the rotor, and the elevator control module includes: a switch , coupled to each of the windings, for switching between a normal mode and a short-circuit mode; a first detector for detecting the motion state of the carriage, and generating a first signal according to the detection result ; a processor, coupled to the frequency converter, the braking element, the switch and the first detector, the processor controls the switch to switch from the normal mode to the short-circuit when judging that the frequency converter meets a predetermined state mode, then close the brake, and then activate the brake according to the first signal.

Thereby, the elevator control module provided by the present invention can perform automatic rescue; in addition, after the processor closes the brake, it activates the brake according to the first signal, so the car can be accurately rescued when the automatic rescue is performed. to reach the destination position quickly, so as to avoid the danger of passengers falling; in addition, the processor has already controlled the switch to switch from the normal mode to the short-circuit mode before turning off the brake, so the moving speed of the carriage can be avoided too fast , in order to take into account the safety and comfort of passengers.

The term "coupling" used in this specification, unless otherwise defined, refers to two or more elements, directly or indirectly, physically connected or available for signal transmission including wired or wireless communication. way to connect.

Please refer to FIG. 1 , which is a schematic diagram of an elevator control module according to a first embodiment of the present invention.

In the first embodiment of the present invention, an elevator system controlled by an elevator control module 100 includes a car 200, a motor 300, a traction sheave 201, a counterweight 203, a frequency converter 205, and a The second stopper 400 around it.

The motor 300 is a permanent magnet synchronous motor, and includes a rotor 301 , a stator 303 and a plurality of windings 305 disposed on the stator 303 . The traction sheave 201 is provided with a wire rope 207 , and two ends of the wire rope 207 are respectively connected to the carriage 200 and the counterweight 203 . The motor 300 drives the carriage 200 by driving the traction sheave 201 to pull the wire rope 207 . function. Each of the windings 305 is disposed on the stator 303 in a three-phase symmetrical manner. The frequency converter 205 is coupled to each of the windings 305, and controls the rotational speed and torque of the rotor 301 by changing the frequency of the input power. Each of the braking elements 400 is an electromagnetic brake for braking the rotor 301 .

In the first embodiment of the present invention, the elevator control module 100 includes a processor 101 , a switch 103 and a first detector 105 .

Please also refer to FIG. 2 , which is a schematic diagram of the coupling relationship among the switch 103 , the motor 300 and the inverter 205 according to the first embodiment of the present invention.

The switch 103 is coupled to each of the windings 305 for switching between the normal mode and the short-circuit mode. The switch 103 is a device that uses the magnetic field generated by the coil current to control the switching, such as a star contactor. In the normal mode, the switch 103 is closed, and the windings 305 are not conductive with each other on the switch 103 side; in the short-circuit mode, the switch 103 is open, and the windings 305 are short-circuited with each other on the switch 103 side.

The first detector 105 can continuously detect the motion state of the carriage 200 and generate a first signal S1 according to the detection result. Optionally, the first detector 105 is an optical encoder sensor, including a light sensor 109 and an encoder, the light sensor 109 is disposed around the motor 300 and coupled to the motor 300 The encoder is used to sense the light signal generated by the rotation of the rotor 301, and transmit the sensed light signal to the encoder for encoding. The first signal S1 includes a The resulting digital signal stream.

The processor 101 is coupled to the inverter 205 , each of the braking elements 400 , the switch 103 and the first detector 105 . Alternatively, the processor 101 is a microcontroller (MCU). When the processor 101 determines that the inverter 205 is in a predetermined state (for example, the inverter 205 is damaged or an overcurrent fault occurs) and needs to perform automatic rescue, in order to avoid the moving speed of the carriage 200 from being too fast, first control the switch 103 is switched from the normal mode to the short-circuit mode, and then the braking elements 400 are closed to temporarily release the braking of the rotor 301, and the rotor 301 can also rotate.

At this time, the carriage 200 and the counterweight 203 move due to the unbalanced weight, which further drives the rotor 301 to rotate. Meanwhile, in the short-circuit mode, each of the windings 305 will generate an anti-magnetic field against the current turning direction of the rotor 301 , so as to achieve the effect of slowing down the moving speed of the carriage 200 .

Next, in order to ensure that the carriage 200 can accurately reach the destination position when the automatic rescue is performed, the processor 101 turns on the braking elements 400 according to the first signal S1 to resume the braking of the rotor 301, and the rotor 301 cannot turn.

Optionally, the processor 101 first obtains motion information about the position, moving direction, speed or acceleration of the carriage 200 according to the first signal S1, and then calculates (the distance between the position of the carriage 200 and a predetermined destination position) , divided by the moving speed of the car 200 ) and update the estimated time of arrival (ie, the time it takes for the car 200 to arrive at the preset destination). When the next first signal S1 is received, the processor 101 can calculate and update the estimated time of arrival again, and repeat the process. When the estimated arrival time calculated by the processor 101 is equal to the braking delay time of the elevator system (which is a preset value, that is, the processor 101 needs to spend on activating the braking member 400 to restore the braking of the rotor 301 ) time), the processor 101 opens each of the braking elements 400 to resume the braking of the rotor 301, and the rotor 301 cannot rotate.

In another embodiment, the processor 101 may first obtain motion information about the position, moving direction, speed or acceleration of the car 200 according to the received first signal S1, and then determine the moving speed of the car 200. When it exceeds a predetermined range (for example, the range of 1 m/min to 15 m/min), each of the braking elements 400 is opened to restore the braking of the rotor 301 to ensure that the moving speed of the carriage 200 does not exceed the predetermined range .

Please refer to FIG. 3 , which is a schematic diagram of an elevator control module according to a second embodiment of the present invention.

As for the implementation of the same components in the second embodiment and the first embodiment, please refer to FIG. 1 and the description of the first embodiment first, which will not be repeated in this specification.

In the second embodiment of the present invention, the elevator system controlled by an elevator control module 100 includes a car 200, a motor 300, a traction sheave 201, a counterweight 203, a frequency converter 205, and a The two brake members 400 around the motor further include at least one mark. The elevator control module 100 not only includes a processor 101 , a switch 103 and a first detector 105 , but also includes a second detector 107 .

The first detector 105 is used to detect the motion state of the carriage 200 and generate a first signal S1 according to the detection result. Optionally, the first detector 105 is disposed on an Absolute Positioning System (APS) reading head on the carriage 200 , and the at least one marker is disposed in the track space for the carriage 200 to move On one of the APS code strips 207 , the first signal S1 includes a signal generated by the APS read head reading the at least one mark on the APS code strip 207 .

The second detector 107 is a weight sensor disposed under the carriage 200 for detecting the load of the carriage 200 and generating a second signal S2 according to the detection result.

The processor 101 is coupled to the inverter 205, each of the braking elements 400, the switch 103, the first detector 105 and the second detector 107, and the processor 101 determines that the inverter 205 meets a In a predetermined state (for example: the inverter 205 is damaged or an overcurrent fault occurs), in order to prevent the moving speed of the carriage 200 from being too fast, firstly control the switch 103 to switch from the normal mode to the short-circuit mode, and then turn off the brakes 400 In order to temporarily release the brake on the rotor 301, the rotor 301 can also rotate. At this time, the carriage 200 and the counterweight 203 move due to the unbalanced weight, which further drives the rotor 301 to rotate. In the short-circuit mode, each of the windings 305 will generate an anti-magnetic field against the current turning of the rotor 301 , to achieve the effect of slowing down the moving speed of the carriage 200 .

In addition, in order to ensure that the car 200 can accurately reach the destination position when the elevator control module 100 executes automatic rescue, the processor 101 first determines a destination position according to the second signal S2, and closes the braking elements 400 after closing each of the braking elements 400. , and then according to the target position and the first signal S1 , each braking element 400 is opened. Optionally, the processor 101 first obtains the information about the load of the car 200 according to the second signal S2, and then compares it with a predetermined load value (for example: 50% of the maximum load value of the car 200), and then compares the load of the car 200 with a predetermined load value. When the load is less than the predetermined load value, the destination location is determined to be an upper and nearest floor (ie, the upper floor that is closest to the current position of the car 200 ), and when the load of the car 200 is greater than the predetermined load value, the destination is determined. The position is the floor below the nearest floor (that is, the floor below the closest floor to the current position of the car 200 ); optionally, the processor 101 can also obtain information about the position, moving direction, speed or speed of the car 200 according to the first signal S1 Acceleration information, and then when it is judged that the moving direction of the carriage 200 does not point to the target position, the braking elements 400 are opened to restore the braking of the rotor 301 .

In the variant embodiments of the present invention, the implementation of each element described in the first embodiment and the second embodiment can be further combined or replaced with each other, which is not limited by the present invention.

In a variant embodiment of the present invention, the processor 101 may be a programmable logic controller (PLC), or other electronic devices capable of implementing logic operations and control functions, which are not limited in the present invention.

In a variant embodiment of the present invention, the elevator control module can be implemented by all or part of the components in a control cabinet, or in an integrated circuit or system, which is not limited by the present invention.

The descriptions of the above embodiments are illustrative in nature, and are not intended to limit the present invention. For those skilled in the art, modifications or equivalent changes made without departing from the spirit and scope of the present invention should still be included in the scope of the patent application of the present invention.

100: Elevator control module 101: Processor 103: switch 105: The first detector 107: Second detector 109: light sensor 200: carriage 201: Traction wheel 203: counterweight block 205: Inverter          207: APS code strip 207: Steel cable 300: motor 301: Rotor 301: stator 305: Winding resistance 400: Brakes

100: Elevator control module

101: Processor

103: Switch

105: First detector

109: Light Sensor

200: Carriage

201: Traction wheel

203: Counterweight

205: Inverter

207: Wire Rope

300: Motor

400: Brakes

Claims (9)

An elevator control module is used to control an elevator system. The elevator system includes a carriage, a motor, a frequency converter, and a brake. The motor includes a rotor, a stator, and a plurality of windings arranged on the stator. In order to drive the car, the frequency converter is coupled to each of the windings to drive the rotor, the brake is used to brake the rotor, and the elevator control module includes: a switch, coupled to each of the windings, for switching between a normal mode and a short-circuit mode; a first detector for detecting the motion state of the carriage, and generating a first signal according to the detection result; a processor, coupled to the inverter, the brake, the switch and the first detector, the processor controls the switch to switch from the normal mode to the short-circuit mode when the processor determines that the inverter meets a predetermined state , then close the brake, and then activate the brake according to the first signal. The elevator control module as described in claim 1, wherein the processor calculates and updates an estimated time of arrival according to the first signal, and starts when the estimated time of arrival is equal to a braking delay time of the elevator system the brake. The elevator control module of claim 1, wherein the processor obtains the moving speed of the car according to the first signal, and activates the brake when the moving speed of the car exceeds a predetermined range. The elevator control module as described in item 1 of the patent application scope further includes: a second detector for detecting the load of the carriage, and generating a second signal according to the detection result; The processor is coupled to the second detector, the processor determines a destination position according to the second signal when judging that the inverter meets the predetermined state, and the processor closes the brake according to the The target position and the first signal activate the brake. The elevator control module as described in item 4 of the scope of application, wherein the processor determines that the destination location is an upper and nearest floor when the load of the car is less than a predetermined load value of the car, and the processor determines the destination location to be an upper and nearby floor, When the load capacity is greater than the predetermined load value of the car, the destination location is determined to be the next floor next to it. The elevator control module as described in claim 5, wherein the predetermined load value is 50% of the maximum load value of the car. The elevator control module as described in claim 1, wherein the first detector includes at least one encoder, and the first signal includes a signal encoded by the encoder. The elevator control module as described in claim 1, wherein the first detector is disposed in the car for detecting a mark, and the mark is disposed in a track space for the car to move. The elevator control module as described in claim 1, wherein when the processor controls the switch to switch from the normal mode to the short-circuit mode, each of the windings generates an anti-magnetic field against the current rotation of the rotor.

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