KR20020078161A - A driving device for an elevator system - Google Patents

Abstract

PURPOSE: A driving unit of an elevator system is provided to divide the control actions of a controller and an inverter into a real-time control action and a sequential control action and perform each action independently. CONSTITUTION: A driving unit(200) of an elevator system comprises a controller(210) and a safety monitor(220). The controller performs a real-time control action of requiring a real-time process and a sequential control action of repeatedly performing a predetermined action according to the predetermined order together, among control actions for performing an elevator system. The controller comprises a real-time control unit(214) and a sequential control unit(212). The safety monitor monitors whether each apparatus operates normally or not, independent of the controller. The safety monitor receives power source(100) through a different path from a path for supplying to the controller. The space for interface between apparatuses and the burden of process for communicating mutually are reduced by the constitution following the properties of the actions.

Description

A driving device for an elevator system

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drive system of an elevator system, and more particularly, to a drive system of an elevator system that performs various control operations required for operating an elevator system according to their respective characteristics.

During operation of the elevator system, the position control of the elevator car which moves the elevator car from its current position to another position in response to a call from the elevator car or the platform of each floor in the building, Various control operations such as control, door driver control, military management control, communication control with a monitoring panel for remote monitoring, and monitoring of various devices constituting the elevator system are performed.

Among the various control operations described above, a typical method of performing the position control operation of the above described elevator car as a representative control operation will be described with reference to FIG. 1 of the accompanying drawings. FIG. 1 is a block diagram schematically showing the main parts of a conventional elevator system. The conventional elevator system includes an elevator car 114 fixedly operated at one side of a rope 116 wound on a sheave 108, and A counterweight 112 fixed to the other side of the rope 116, an electric motor 106 for driving the sheave 108 for driving the elevator car 114, and a speed for detecting the speed of the electric motor 106 An inverter 102 for supplying power to the detector 110, the electric motor 106 and controlling the rotational speed thereof, and applying a command to the inverter 102 to control the position of the elevator car 114. And at the same time it is provided with a controller 104 for performing the control operation of the various elevators required for the operation of the elevator. The controller 104 and the inverter 102 provided in the conventional elevator system are each independently supplied with power from the power supply 100, so that when an abnormal state occurs in any one of them, the elevator car 114 falls. It is also configured to perform safety functions to prevent accidents.

According to the conventional elevator system of the above-described configuration, when a call is made from the elevator car 114 or the platform, the controller 104 is the elevator car from the information of the current position and the destination of the elevator car 114 The 114 calculates a distance to be moved, generates a predetermined speed pattern according to a preset algorithm based on the calculated distance, and supplies a speed command to the inverter 102. The inverter 102 drives the electric motor 106 according to the speed command to move the elevator car 114 to the destination.

That is, the position control operation of the elevator car 114 generally performed by the elevator system includes recognition of the current position and destination of the elevator car 114, calculation of a moving distance, generation of a speed pattern, speed control of an electric motor, and the like. It consists of various control operations. Among the control operations described above, the control operations such as the calculation of the moving distance, the generation of the speed pattern, and the speed control of the motor should be performed in real time by a very complicated algorithm. Meanwhile, among the control operations described above, other control operations including recognition of the current position and destination of the elevator car 114 are relatively simple operations, and are sequentially performed in a sequence of orders. As such, various control operations performed by a general elevator system may be divided into control operations to be performed in real time and control operations sequentially performed. Hereinafter, for convenience, the former is referred to as a "real time control operation", and the latter This is called "sequential control operation".

According to the controller 104 and the inverter 102 provided in the conventional elevator system, the real time control operation and the sequential control operation as described above were performed by the controller 104 or the inverter 102 without being distinguished from each other. A position control operation of a conventional elevator car 114 will be described in more detail with reference to this example. That is, according to the conventional elevator system of the configuration as shown in Figure 1, the speed control operation of the electric motor 106 of the real-time control operation is configured to be performed in the inverter 102, and other real-time control operation and The sequential control operations are all configured to be performed in the controller 104. In the conventional elevator system, the real-time control function is configured to be performed by two different devices because it is advantageous in terms of cost to use an inverter having only a speed control function.

The conventional elevator system as described above may be classified into two types according to a method of generating a speed pattern in the controller 104. First, in a method of calculating and generating a speed pattern in real time by a controller, a speed command according to the generated speed pattern is applied to the inverter 102 in an analog manner, and the inverter 102 is driven by an electric motor according to the speed command. A method of controlling the speed of 106) may be mentioned. This method is currently used mainly in high-end elevator systems.

According to the conventional elevator system as described above, while the operation of the elevator car 114 has an advantage of improving the riding comfort, as described above, a high performance microprocessor is required to calculate the speed pattern in real time. In other words, the cost is increased, and the communication between the controller 104 and the inverter 102 is performed in an analog manner, which is disadvantageous in noise.

In order to solve the above problems, instead of calculating the speed pattern in real time, a method of inputting and storing predetermined speed patterns in advance and simply calling them and applying a speed command accordingly has also been proposed. That is, first, the multi-step speed pattern is stored in the controller 104, the speed pattern suitable for the moving distance of the elevator car 114 is selected, and then the speed data is digitized and applied to the inverter 102. That's the way. This conventional alternative method is noise-resistant because the communication between the controller 104 and the inverter 102 is made digital, which reduces the processing burden of the controller 104, and can be implemented at a relatively low cost. It has an advantage.

However, according to another conventional method as described above, since the speed pattern used is a piecewise linear function, the acceleration pattern is discontinuous, and the speed pattern is discontinuous. It is inevitable that so-called 'creep operation' occurs. Therefore, there is a disadvantage that the operation of the elevator is not smooth, the riding comfort is lowered, and the driving efficiency is bad.

Furthermore, such conventional schemes require a large amount of processing burden because the controller 104 must monitor the position of the elevator car 114 in real time, and the output from the speed detector 110 is controlled by the controller ( There is a problem that must be input to both 104 and the inverter 102.

In addition, there is a problem that the overall configuration of the control system is inefficient and the cost thereof increases, such as an increase in the space and communication burden for the interface of the controller 104 and the inverter 102.

The present invention was devised to solve the above problems, and an object of the present invention is to divide a control operation performed by a controller and an inverter provided in a conventional elevator system into a real time control operation and a sequential control operation according to its characteristics. The present invention provides a drive system for an elevator system having a processing device configured to independently perform each of these operations.

1 is a block diagram schematically showing the main parts of a conventional elevator system;

Figure 2 is a block diagram schematically showing the drive system and other main parts of the elevator system according to the present invention.

FIG. 3 is a detailed block diagram showing a portion of the drive system and other main parts of the elevator system of FIG.

4 is a detailed block diagram showing another part of the drive system and other main parts of the elevator system of FIG.

* Explanation of symbols in the main parts of the drawings

100: power supply 200: drive device

210: controller 220: safety monitoring

In order to achieve the above object, the present invention is a drive system of an elevator system for driving an elevator car that is installed in a building having at least two or more floors, the various devices constituting the elevator system and A controller which is connected to perform a control operation integrating a real time control operation requiring real time processing and a sequential control operation repeatedly performing a predetermined operation according to a preset order among control operations to be performed for the operation of the elevator system; And connected to the various devices constituting the elevator system to monitor the normal operation of the various devices independently of the controller, the safety is supplied power through a path separate from the power supply path supplied to the controller It provides a drive device of an elevator system including a monitor.

Hereinafter, with reference to the accompanying drawings will be described the configuration and method of the controller and drive of the elevator system according to the present invention.

First, referring to FIG. 2, FIG. 2 is a block diagram schematically showing a controller and a driving device and other main parts of an elevator system according to the present invention. Of the main parts of the elevator system shown in FIG. 2, the same ones as shown in FIG. 1 are indicated using the same reference numerals as used in FIG. 1.

As shown, the drive device 200 of the elevator system according to the present invention is connected to the various devices constituting the elevator system, real-time processing of the real-time processing of the control operation to be performed for the operation of the elevator system is required. The controller 210 performs the control operation and the sequential control operation of repeatedly performing a predetermined operation in accordance with a preset order, and is connected to various devices constituting the elevator system and independently of the controller 210. While monitoring the normal operation of the various devices, it includes a safety monitor 220 is supplied with power through a separate path from the power supply path supplied to the controller 210.

For example, the safety monitor 220 is powered from a No Fuse Braker (NFB) 290, while the controller 210 is powered from an input magnetic contactor (MC) 260. .

In addition, according to a preferred embodiment of the present invention, the controller 210 is implemented so that the control operations that were performed by the controller 104 and the inverter 102 provided in the conventional elevator system are integrated and processed. The real-time control unit 214 performs a dedicated real-time control operation among various processing operations required for the control of the elevator system, and a sequential control unit 212 dedicated to perform a sequential control operation sequentially performed according to a series of other orders. It is preferable to include). The real-time control unit 214 and the sequential control unit 212 included in the controller 210 are sufficient to perform a real-time control operation and a sequential control operation independently of each other, and are physically or logically distinguished hardware or software. It can be implemented by.

Furthermore, in the controller 210, the real-time control unit 214 and the sequential control unit 212 are configured using two microprocessors that operate independently from each other so as to optimally perform the real-time control operation and the sequential control operation. It is more preferable that each be implemented.

Meanwhile, the safety monitor 220 monitors the state of various devices included therein for the safe operation of the elevator system, and is connected to the controller 210 and predetermined devices involved in the safety of the elevator system. To monitor their normal operation.

3 and 4, the drive device 200 of the elevator system of the present invention will be described in more detail. FIG. 3 is a detailed block diagram showing a part of the controller and drive unit and other main parts of the elevator system of FIG. 2, and FIG. 4 shows another part of the controller and drive unit and other main parts of the elevator system of FIG. Detailed block diagram.

First, referring to FIG. 3, the sequential control unit 212 is for performing the sequential control operation among various control operations to be performed for the operation of the elevator system. As shown, the output side magnetic contactor ( 270, safety switch 280, governor 250, brake 232, car upper controller 310, door driver 320, button / indicator 330 of the elevator car 114, button / indicator of the platform 340 and the like to control the devices.

Next, the real-time control unit 214 is to perform the real-time control operation of the various control operations to be performed for the operation of the elevator system, as shown, the current detector 332, the speed detector 234 ) Is connected to the position detector 380 and the like to receive signals from them, and is connected to the power converter 240 to control its operation.

The driving device 200 of the elevator system of the present invention will be described in detail for the process of performing the position control operation of the elevator car. The sequential controller 212 monitors the state of the button / indicator 330 of the elevator car 114 and the button / indicator 340 of the boarding point, and when a call occurs from the elevator car 114 or the boarding point, The call indication signal is transmitted to the indicator 330 or 340 of the elevator car or the platform. In addition, the sequential control unit 212 is also connected to the real-time control unit 214 and transmits the information such as the current position and destination of the elevator car 114 to him.

The real time control unit 214 receives the information transmitted from the sequential control unit 212 and performs a position control operation in response thereto. That is, the real-time control unit 214 calculates the distance that the elevator car 114 must move from the current position to the destination, and generates a speed pattern. Next, a control signal for driving the motor 230 is generated according to the generated speed pattern and transmitted to the power converter 240. The power converter 240 is a device for converting the voltage and frequency of the three-phase alternating current, and is typically composed of a three-phase bridge diode and an inverter, or a converter and an inverter. In this case, the control signal transmitted to the power converter 240 is a gate driving signal of the switching element constituting the power converter 240.

The real-time control unit 214 is a speed value and current of the electric motor 230 from a predetermined current detector 332 and the speed detector 234 to precisely control the speed of the electric motor 230 while the elevator system is running. Receive a value. In addition, the real-time control unit 214 receives the position signal from a predetermined position detector 380 as the elevator car 114 reaches the destination, and the elevator car 114 stops at a preset stop position. After the elevator car 114 stops, a signal indicating that the elevator car 114 is stopped is transmitted to the sequential control unit 212. The sequential control unit 212 transmits a signal to a predetermined door driver 320 in response to this signal to open and close the door.

As described above, the real-time control unit 214 performs a real-time control operation that requires real-time calculation and processing of the position control operation for controlling the position of the elevator car 114, that is, the movement of the elevator car 114 Calculate a distance, generate a speed pattern, receive signals from the current detector 332, the speed detector 234, and the position detector 380, and drive the power converter 240 to control the speed of the motor. Do this. In addition, communication with the sequential control unit 212 is performed. Since the main function of the real-time control unit 214 is to perform a complex operation and processing in real time, the real-time control unit 214 is a microprocessor (for example, 32-bit microprocessor) capable of performing a complex operation and processing at high speed It is preferable to employ and implement.

On the other hand, the sequential control unit 212 performs only the sequential control operation such as supplying the position control information to the real-time control unit 214, in addition to the real-time control operation of the position control operation of the elevator car. Further, the sequential control unit 212, in addition to the above-described position control operation, various sequential control operations required for the operation of the elevator system, that is, communication with the real-time control unit 114, button / of the elevator car or platform Communication with the indicators 330 and 340 and communication with the door driver 320 are performed.

In addition to the above operations, for example, the sequential control operation performed by the sequential control unit 212, communication with the safety monitor 220, communication with the elevator car upper controller 310, communication with the military management controller 360, Performs various communication operations such as communication with the monitoring panel 350 for the remote monitoring function, and monitors and controls the various safety switches 280, the governor 250, the brake 232, the output side magnetic contactor 270, and the like. do. The safety switch 280 includes various switches related to safety and failure of the elevator system such as door switches, limit switches, and firefighting switches.

As described above, the sequential control unit 212 sequentially performs relatively simple operations in a predetermined order as compared with the real time control unit 214 such as various communication operations and input / output processing operations of signals or data. According to a specific embodiment of the present invention, since the various communication operations can be implemented by, for example, a serial communication method, the sequential control unit 212 is a 16-bit microcomputer having a serial communication function and various input / output functions. It can be implemented using a processor.

As the information transmitted and received between the sequential control unit 212 and the real-time control unit 214, for example, various operations necessary for the operation of the elevator system, such as the operation state of the elevator car 114, a specific part of the system or whether or not an overall abnormality occurs. Information is included.

Next, the configuration and operation of the safety monitor 220 will be described in detail with reference to FIG. 4. The safety monitor 220 monitors the status of various devices included therein for safe operation of the elevator system, and is connected to predetermined devices that are involved in the safety of the elevator system to monitor their normal operation. The controller 210 also monitors normal operation. In addition, the safety monitor 220, as described above, because the power is supplied through a separate path from the controller 210, even if an emergency occurs in the controller 210, the overall safety of the elevator system I can guarantee it. Conversely, when a problem occurs in the safety monitor 220, the controller 210 detects this to ensure the safety of the elevator system, and may cause the manager to take action.

For example, the safety monitor 220 is a normal operation of the safety switch 280, the governor 250, the brake 232, etc. when the breaker 290 is turned on when the elevator system is activated and power is applied. If the status is normal, the system supplies power to the system by closing the input side magnetic contactor 260. On the other hand, while the operation of the elevator system is in progress, and monitors the state of the various devices constituting the elevator system, if the abnormality occurs in the input side magnetic contactor 260 or output side magnetic contactor 270 to supply power to the system Abort.

As described above, the safety monitor 220 is to monitor the overall state of the elevator system, while the operation to be performed is simple, while processing the various input and output signals with various devices. Therefore, according to a specific embodiment of the present invention, the safety monitor 220 may be implemented using an 8-bit microprocessor having a processing function of various input and output.

According to the controller, the drive device and the method of the elevator system according to the present invention can achieve the following effects.

First, according to the present invention, by configuring the integrated type according to the characteristics of the operation to be performed, the space for the interface between the devices and the processing burden for the communication between each other is reduced as compared with the conventional case.

In addition, according to the present invention, the real-time control unit 214 and the sequential control unit 212 is divided into a controller 210, the real-time control unit 214 performs a real-time control operation such as position control of the elevator car 114 And since the sequential control unit 212 can distinguish and use the microprocessor suitable for each function to perform only the sequential control operation, not only can increase the execution efficiency of the control operation, but also reduce the configuration cost thereof. have.

Furthermore, according to the present invention, since the controller 210 and the safety monitor 220 can monitor whether the normal operation between each other, provided with a separate safety monitor 220, any one of the fault or error, etc. Even in the event of an emergency, the safety of the entire elevator system can be guaranteed. Furthermore, the controller 210 and the safety monitor 220 monitor the state of various devices related to the safety of the elevator system, such as the safety switch 280, the governor 250, the brake 232, and the overall safety of the elevator system. Can enhance the function.

Claims (5)

In the drive system of the elevator system for driving the elevator car which is installed in a building having at least two or more floors to move between the floors, It is connected to various devices constituting the elevator system of the control operation to be performed for the operation of the elevator system real-time control operation requiring real-time processing and sequential control operation to repeatedly perform a predetermined operation in a predetermined order A controller that performs integration; And Is connected to the various devices constituting the elevator system to monitor the normal operation of the various devices independently of the controller, the safety monitor receiving power through a path separate from the power supply path supplied to the controller Driving device of the elevator system comprising a. The method of claim 1, The controller, A real time control unit configured to perform a dedicated real time control operation among various processing operations required for the control of the elevator system; And An elevator system driving apparatus including a sequential control unit for performing a sequential control operation that is performed sequentially according to a series of orders. The method of claim 1, The controller, An apparatus for driving an elevator system implemented using two microprocessors that independently perform the real-time control operation and the sequential control operation. The method of claim 1, The safety monitor, Driving device of the elevator system for monitoring the normal operation of the controller. The method of claim 1, The controller, Driving device of the elevator system for monitoring the normal operation of the safety detector.