CN114789954A

CN114789954A - Elevator control module with automatic rescue function

Info

Publication number: CN114789954A
Application number: CN202110162600.8A
Authority: CN
Inventors: 陈冠良; 李文雄; 柯李建; 沈炳丰; 黄瑛杰; 钟维宸; 萧伊成; 陈至杰; 郑志源; 张志雄
Original assignee: Yung Tay Engineering Co ltd
Current assignee: Yung Tay Engineering Co ltd
Priority date: 2021-01-25
Filing date: 2021-02-05
Publication date: 2022-07-26
Also published as: TW202229150A

Abstract

The invention provides an elevator control module with an automatic rescue function, which comprises a switch, a first detector and a processor. When the processor judges that the elevator frequency converter accords with a preset state, the switch is controlled to be switched from a normal mode to a short-circuit mode, then the elevator braking part is closed, and the elevator braking part is started according to a first signal generated by the first detector, so that when automatic rescue is carried out, the elevator compartment can be ensured to accurately reach a target position, and the safety and the comfort of passengers are both considered.

Description

Elevator control module with automatic rescue function

Technical Field

The invention relates to an elevator control module, in particular to an elevator control module capable of executing automatic rescue.

Background

When an elevator system encounters emergency such as frequency converter damage or overcurrent fault, the frequency converter loses control over the motor rotor, so the rotor needs to be braked by a brake piece, and the elevator car is prevented from rushing or falling. At this time, since the elevator car cannot move, passengers are trapped in the car and wait for rescue workers to rescue them manually.

In the face of the emergency situation that passengers are trapped, if rescue is carried out by the prior art, the passengers are likely to fall off when leaving the elevator car due to the fact that the elevator car cannot accurately reach the target position; in addition, if rescue is performed according to the prior art, passengers may fall or collide in the elevator car and be injured or feel uncomfortable and feared due to too high moving speed of the elevator car.

Disclosure of Invention

In view of the above, an object of the present invention is to provide an elevator control module capable of automatically rescuing passengers in an elevator car in case of an emergency such as a frequency converter damage or an overcurrent failure.

Another object of the present invention is to ensure that the elevator control module can accurately reach a destination position when performing automatic rescue, thereby preventing passengers from falling down.

Another objective of the present invention is to provide an elevator control module that can prevent the elevator car from moving too fast when performing automatic rescue, so as to ensure safety and comfort of passengers.

To achieve the above object, the present invention provides an elevator control module for controlling an elevator system, the elevator system including a car, a motor, a frequency converter and a braking member, the motor including a rotor, a stator and a plurality of windings disposed on the stator for driving the car, the frequency converter being coupled to each of the windings for driving the rotor, the braking member for braking the rotor, the elevator control module including: a switch coupled to each winding 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; and the processor is coupled with the frequency converter, the braking part, the switch and the first detector, controls the switch to be switched from the common mode to the short-circuit mode when judging that the frequency converter accords with a preset state, then closes the braking part, and starts the braking part according to the first signal.

Therefore, the elevator control module provided by the invention can execute automatic rescue; moreover, after the braking part is closed, the braking part is started by the processor according to the first signal, so that the carriage can accurately reach a target position when automatic rescue is carried out, and the dangers of falling and the like of passengers are avoided; before the braking member is closed, the processor controls the switch to switch from the normal mode to the short-circuit mode, so that the carriage can be prevented from moving too fast, and the safety and the comfort of passengers can be both considered.

Drawings

Fig. 1 is a schematic diagram of an elevator control module according to a first embodiment of the present invention;

fig. 2 is a schematic diagram illustrating a coupling relationship among the switch 103, the motor 300 and the inverter 205 according to a first embodiment of the present invention;

fig. 3 is a schematic diagram of an elevator control module according to a second embodiment of the present invention.

Detailed Description

As used herein, "coupled" means, without further limitation, two or more elements are directly or indirectly connected with each other in a physical manner or in a manner that includes a connection or a wireless connection for signal transmission.

Referring to fig. 1, a schematic diagram of an elevator control module according to a first embodiment of the present invention is shown.

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 two braking members 400 disposed around the motor.

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 steel cable, two ends of the steel cable are respectively connected to the car 200 and the counterweight 203, and the motor 300 drives the traction sheave 201 to drive the car 200 in a manner of pulling the steel cable. 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 winding 305, and controls the rotation speed and torque of the rotor 301 by changing the frequency of the input power. Each brake 400 is an electromagnetic brake for braking the rotor 301.

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

Please refer to fig. 2, which is a schematic diagram illustrating a coupling relationship among the switch 103, the motor 300 and the frequency converter 205 according to a first embodiment of the present invention.

The switch 103 is coupled to each winding 305 for switching between a normal mode and a short-circuit mode. The switch 103 is a device for controlling the switching by means of a magnetic field generated by a coil current, and may be, for example, a star contactor. In the normal mode, the switch 103 is closed, and the windings 305 are not conducted with each other on the switch 103 side; in the short-circuit mode, the switch 103 is opened, and the windings 305 are short-circuited with each other on the switch 103 side.

The first detector 105 can continuously detect the motion status of the car 200 and generate a first signal S1 according to the detection result. Alternatively, the first detector 105 is an optical encoding sensor, and includes a light sensor 109 and an encoder, the light sensor 109 is disposed around the motor 300 and coupled to the encoder for sensing a light signal generated by the rotation of the rotor 301 and transmitting the sensed light signal to the encoder for encoding, and the first signal S1 includes a digital signal stream generated by encoding through the encoder.

The processor 101 is coupled to the frequency converter 205, the braking members 400, the switch 103 and the first detector 105. Optionally, the processor 101 is a Microcontroller (MCU). When the processor 101 determines that the frequency converter 205 meets a predetermined condition (e.g., the frequency converter 205 is damaged or an overcurrent fault occurs) and needs to perform an automatic rescue, in order to avoid an excessive speed of the car 200, the switch 103 is first controlled to switch from the normal mode to the short-circuit mode, and then the braking members 400 are closed to temporarily release the braking of the rotor 301, so that the rotor 301 can rotate.

At this time, the weight of the car 200 and the weight 203 is unbalanced, and the rotor 301 is further driven to rotate. Meanwhile, in the short-circuit mode, each winding 305 generates a counter magnetic field to counter the current turning direction of the rotor 301, so as to slow down the moving speed of the car 200.

Then, in order to ensure that the car 200 can accurately reach the destination position when the automatic rescue is performed, the processor 101 activates each braking member 400 according to the first signal S1 to resume braking the rotor 301, so that the rotor 301 cannot rotate.

Alternatively, the processor 101 obtains motion information about the position, moving direction, speed or acceleration of the car 200 according to the first signal S1, calculates (dividing the distance between the position of the car 200 and a preset destination position by the moving speed of the car 200) and updates the estimated arrival time (i.e., the time required for the car 200 to reach the preset destination position). When the next first signal S1 is received, the processor 101 can again calculate and update the estimated time of arrival, and so on. When the estimated time of arrival calculated by the processor 101 is equal to the brake delay time of the elevator system (a predetermined value, i.e., the time the processor 101 needs to spend activating the braking members 400 to resume braking the rotor 301), the processor 101 activates each of the braking members 400 to resume braking the rotor 301, and the rotor 301 cannot rotate.

In another embodiment, the processor 101 may also obtain motion information about the position, moving direction, speed or acceleration of the car 200 according to the received first signal S1, and then activate the braking members 400 to resume braking the rotor 301 when the moving speed of the car 200 is determined to be beyond a predetermined range (e.g., a range of 1 m/min to 15 m/min), so as to ensure that the moving speed of the car 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 component implementation manner of the second embodiment that is the same as that of the first embodiment, please refer to fig. 1 and the description of the first embodiment, which are not repeated herein.

In the second embodiment of the present invention, an elevator system controlled by an elevator control module 100 includes at least one mark in addition to a car 200, a motor 300, a traction sheave 201, a counterweight 203, a frequency converter 205, and two braking members 400 disposed around the motor. The elevator control module 100 includes a second detector 107 in addition to a processor 101, a switch 103, and a first detector 105.

The first detector 105 is configured to detect a motion state of the car 200 and generate a first signal S1 according to the detection result. Alternatively, the first detector 105 is an Absolute Positioning System (APS) pick-up disposed on the car 200, the at least one mark is disposed on an APS code bar 207 in the track space for the car 200 to move, and the first signal S1 includes a signal generated by the APS pick-up reading the at least one mark on the APS code bar 207.

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

The processor 101 is coupled to the frequency converter 205, the braking members 400, the switch 103, the first detector 105 and the second detector 107, and when the processor 101 determines that the frequency converter 205 meets a predetermined condition (for example, the frequency converter 205 is damaged or an overcurrent fault occurs), the processor 101 controls the switch 103 to switch from the normal mode to the short-circuit mode, and then turns off the braking members 400 to temporarily release the braking of the rotor 301, so that the rotor 301 can rotate, in order to avoid an excessive speed of movement of the car 200. At this time, the car 200 and the counterweight 203 move due to the unbalanced weight, and further drive the rotor 301 to rotate, and in the short-circuit mode, each of the windings 305 generates a counter magnetic field that counters the current direction of the rotor 301, thereby achieving the effect of slowing down the moving speed of the car 200.

In addition, in order to ensure that the car 200 can accurately reach the destination position when the elevator control module 100 performs the automatic rescue, the processor 101 determines a destination position according to the second signal S2, and turns on the braking members 400 according to the destination position and the first signal S1 after turning off the braking members 400. Alternatively, the processor 101 obtains information about the load of the car 200 according to the second signal S2, and then compares the information with a predetermined load value (e.g., 50% of the maximum load value of the car 200), determines that the destination position is an upper nearest floor (i.e., an upper floor nearest to the current position of the car 200) when the load of the car 200 is less than the predetermined load value, and determines that the destination position is a lower nearest floor (i.e., a lower floor nearest to the current position of the car 200) when the load of the car 200 is greater than the predetermined load value; alternatively, the processor 101 may also obtain information about the position, moving direction, speed or acceleration of the car 200 according to the first signal S1, and then activate the braking members 400 to resume braking the rotor 301 when it is determined that the moving direction of the car 200 is not directed to the destination position.

In the modified embodiment of the present invention, the component embodiments described in the first embodiment and the second embodiment can be further combined or replaced with each other, and the present invention is not limited thereto.

In alternative embodiments of the present invention, the processor 101 may be a Programmable Logic Controller (PLC), or other electronic devices capable of implementing logic operation and control functions, and the present invention is not limited thereto.

In the modified embodiment of the present invention, the elevator control module may be implemented by disposing all or part of the components in a control cabinet, or by using an integrated circuit or system, and the present invention is not limited thereto.

The foregoing description of the embodiments is illustrative, and is not intended to be limiting. Modifications and equivalents of the invention which may occur to those skilled in the art without departing from the spirit and scope of the invention are intended to be included within the scope of the appended claims.

[ description of symbols ]

Elevator control module 100

Processor 101

Switch 103

First detector 105

Second detector 107

Light sensor 109

Vehicle body 200

Traction sheave 201

Counterweight 203

Frequency converter 205

APS code bar 207

Motor 300

Rotor 301

Stator 301

Winding 305

A stopper 400.

Claims

1. The utility model provides an elevator control module for control an elevator system, this elevator system includes a carriage, a motor, a converter and a braking piece, this motor includes a rotor, a stator and sets up in a plurality of windings of this stator for drive this carriage, this converter is coupled in each this winding, is used for driving this rotor, this braking piece is used for braking this rotor, this elevator control module includes:

a switch coupled to each winding 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;

and the processor is coupled with the frequency converter, the braking part, the switch and the first detector, controls the switch to be switched from the common mode to the short-circuit mode when judging that the frequency converter accords with a preset state, then closes the braking part, and starts the braking part according to the first signal.

2. The elevator control module according to claim 1, wherein the processor calculates and updates an estimated time of arrival based on the first signal, the detent being activated when the estimated time of arrival equals a brake delay time of the elevator system.

3. The elevator control module according to claim 1, wherein the processor obtains the car speed based on the first signal, and activates the braking member when the car speed exceeds a predetermined range.

4. The elevator control module of claim 1, further comprising:

the second detector is used 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, determines a target position according to the second signal when judging that the frequency converter meets the preset state, and starts the braking member according to the target position and the first signal after closing the braking member.

5. The elevator control module of claim 4, wherein the processor determines the destination location to be an upper nearby floor when the car load is less than a predetermined load value for the car, the processor determining the destination location to be a lower nearby floor when the car load is greater than the predetermined load value for the car.

6. The elevator control module of claim 5, wherein the predetermined load value is 50% of the maximum load value of the car.

7. The elevator control module of claim 1, wherein the first detector comprises at least one encoder, and the first signal comprises a signal encoded by the encoder.

8. The elevator control module according to claim 1, wherein the first detector is disposed in the car to detect a mark disposed in a track space for movement of the car.

9. The elevator control module of claim 1, wherein each of the windings generates a reluctance magnetic field opposing a current direction of rotation of the rotor when the processor controls the switch to switch from the normal mode to the short circuit mode.