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Starting torque compensation method for elevator system and elevator system
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A technology for starting torque and elevator systems, which is applied to elevators, elevators, transportation and packaging in buildings, etc., and can solve the problems of large control bandwidth, large calculation cycle, and calculation errors of torque controllers.
Active Publication Date: 2022-04-12
SHANGHAI MITSUBISHI ELEVATOR CO LTD
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Problems solved by technology
[0007] Problem 1, impose additional constraints on the torque compensation calculation period Ts and the control bandwidth Td of the torque controller
[0011] The first result above, that is, the iterative cycle of torque compensation calculation cannot reach the minimum, which will lead to the limitation of the calculation speed of torque compensation; that is, although only a small calculation cycle is required, the torque compensation value close to the required value can be obtained. But the calculation cycle itself is larger
The second result above, that is, the control bandwidth of the torque controller must be large, which will affect the stability of the torque control, and then make the noise and vibration indicators of the elevator actuator worse.
[0012] Problem two, in the first effective calculation period of the torque compensation value, the wrong sign may be calculated for the compensation value (that is, the torque compensation value approaches the wrong direction)
The reason why the sign error occurs is that at the moment when the elevator starts to run, the elevator actuator may vibrate extremely slightly, and the direction of the jitter is bidirectional; the "extremely small" means that such a jitter The amplitude is so small that it is usually not detected by the speed feedback detection mechanism
However, the speed feedback detection mechanism may be in a critical state where the output value is about to change; in this case, a "tiny" jitter will also cause the feedback speed signal to respond
Although the probability is very low, it does happen
Method used
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Embodiment 1
[0049] Below, according to figure 2 Preferred embodiments of the present invention will be described. This embodiment is suitable for elevators without weight sensors.
[0050] The calculated torque compensation value is CI; perform the following steps:
[0051] Step 1, define the variable DI.
[0052] Step 2, assign the following variables as:
[0053] CI = 0;
[0054] DI=ratedI;
[0055] Among them, ratedI is the torque value required to maintain the force balance when the rated load is placed in the car;
[0056] Step 3, if the elevator is in a stopped state, then perform step 2;
[0057] Otherwise, go to step 4.
[0058] Step 4, if VF is equal to 0, execute step 5;
[0059] Otherwise, go to step three.
[0060] Step five, execute the validity test;
[0061] If the validity test result is not passed, then perform step 3;
[0062] Otherwise, go to step six.
[0063] Step six, if the result of multiplying VF by CI is less than or equal to 0, go to step eight;
...
Embodiment 2
[0092] This embodiment is suitable for elevators with biased weight sensors.
[0093] The calculated torque compensation value is CI; perform the following steps:
[0094] Step 1, define the variable DI.
[0095] Step 2, assign the following variables as:
[0096] CI = 0;
[0097] DI=ratedI*constD;
[0098] Among them, ratedI is the torque value required to maintain the force balance when the rated load is placed in the car; constD is the percentage of the maximum possible deviation of the weight sensor to ratedI.
[0099] Step 3, if the elevator is in a stopped state, then perform step 2;
[0100] Otherwise, go to step 4.
[0101] Step 4, if VF is equal to 0, execute step 5;
[0102] Otherwise, go to step three.
[0103] Step five, execute the validity test;
[0104] If the validity test result is not passed, then perform step 3;
[0105] Otherwise, go to step six.
[0106] Step six, if the result of multiplying VF by CI is less than or equal to 0, go to step eight;...
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Abstract
The invention discloses a starting torque compensation method for an elevatorsystem. The elevatorsystem includes a main controller, a speed controller, a starting torque compensator, a torque controller and an executing mechanism. The starting torque compensation method for the elevatorsystem of the present invention reduces the calculation period of the torque compensation, maintains the stability of the torque control, and meets the requirement of accurate calculation. The invention also relates to an elevator system.
Description
technical field [0001] The invention relates to the field of elevators, in particular to a starting torque compensation method for an elevator system. The invention also relates to an elevator system. Background technique [0002] When the elevator starts, in order to make the passengers in the car feel comfortable, an appropriate starting torque must be applied to keep the mechanical system of the elevator in balance. Typically, an elevator control system takes information from a weight sensor and calculates the required starting torque. However, the starting torque value requires additional compensation in the following cases: [0003] In the first case, the output information of the weight sensor deviates, which leads to a deviation in the calculation result of the starting torque. [0004] In the second case, in order to reduce the cost, or simplify the elevator installation, commissioning, and maintenance workload, some elevators do not have weight sensors, but only ...
Claims
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Application Information
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