Directly stopping elevator system and its control method
A control method and elevator technology, applied in elevators, transportation and packaging, etc., can solve the problems of longer crawling distance, longer crawling time, and not too high crawling speed
Inactive Publication Date: 2005-10-26
SHANGHAI MITSUBISHI ELEVATOR CO LTD
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Problems solved by technology
[0007] But this creates other problems for the elevator
Because Figure 4 When the upper and lower leveling switches 7 and 8 are activated at T3, in order to make the leveling accurate and the brake acceleration not too large, the stop distance S2 should not be too large, generally between 5-8mm, so the crawling speed V1 The setting should not be too high
This will cause the elevator to vibrate to a certain extent when the elevator is crawling due to the low-speed characteristics of the motor, which will cause passengers to feel uncomfortable.
In addition, due to the measurement error of the detection car position caused by the PLC execution cycle, the actual remaining distance when the PLC sends the deceleration point is smaller than the required deceleration distance, the elevator may exceed the leveling position and reverse the leveling, so the PLC must be forced to issue the deceleration in advance In this way, the inverter drives the motor to decelerate in advance without causing the elevator to run too far, which will lengthen the crawling distance, increase the crawling time, and reduce the operating efficiency of the elevator.
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[0032] Such as figure 1 The elevator system and the control method thereof that the present invention adopts shown, this elevator system comprises elevator car 5 and the upper leveling switch 7 that is installed on the side wall of elevator car 5 and the lower leveling switch 8, elevator well 6 and is installed in the well. 6 The magnetic isolation plate 9 at each floor position on the side wall, the magnetic isolation plate 9 is associated with the upper leveling switch 7 and the lower leveling switch 8, and the above-mentioned signals are accompanied by other safety signals 11 of the elevator, car instructions and buttons of each floor The signals 12 and so on are sent to the programmable logic controller for management and control of the elevator, and the input and output signals 10 are sent and received through the signal line, and the frequency converter 2 can obtain the logic signal detected and processed by the PLC, such as the elevator's automatic, Inspect or write th...
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The elevator system includes programmable logic controller, frequency converter, motor, encoder, cage lift wall and various switch signals. The frequency converter controlled motor drives the elevator cage to move up and down; the programmable logic controller controls the elevator via the detection of various lift wall, storey station and cage signals; the programmable logic controller controls the start and stop of the frequency converter via the connecting wires to the frequency converter, makes the frequency converter obtain accurate remainder distance information for the real-time correction of the elevator deceleration curve, accurate storey leveling, high elevator efficiency and comfortability.
Description
technical field [0001] The invention relates to an elevator system, in particular to an elevator system capable of realizing direct parking and a control method. Background technique [0002] In existing elevators, a programmable logic controller (hereinafter referred to as PLC) and a frequency converter are used as the control system. In this system, the PLC realizes the control and management of the elevator by detecting the states of the hoistway and the car, and controls the start and stop of the frequency converter according to these detection signals. The frequency converter generates a speed curve, and drives the motor to make the elevator car move up and down according to the predetermined running curve. [0003] In this system, PLC can perform such as elevator safety monitoring, hoistway signal detection, car command, landing call signal detection, maintenance, and confirmation of automatic running status. After processing various signals, the inverter can be star...
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IPC IPC(8): B66B1/06B66B1/36
Inventor 朱思中忻谊黄维纲
Owner SHANGHAI MITSUBISHI ELEVATOR CO LTD