SU1414745A1 - Device for controlling starting of high-speed lift - Google Patents

Abstract

This invention relates to electrical equipment for high-speed elevators and can be used in automatic speed control systems for passenger elevators. The aim of the invention is to reduce the start time by compensating for the moment of friction using iio.ii. installation with gearless Lukhan; transfer. The momentum factor of static resistance present in the mechanical part of the elevator is achieved by introducing into the device l. , By starting a speed elevator of a non-linear unit 12, which introduces a correction to the ground 1 of controlling the speed of rotation of bodies 2 by means of: a signal lia one and: summing inputs) forces (bodies U - a) 1. Inputs of block 12 connect the instructions to; A: 5 motion intensity, the output of which is connected to one of the inputs of the world signal 4 signal, is proportional to the change in the cab position relative to a predetermined one. from block 6 time; Trough - GUSTs ensures a smooth start of the elevator installation with high accuracy locations OS- - SETTING ZP f-2 and ly .-- to (A...

Description

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The invention relates to electrical equipment of high-speed elevators and can be used in automatic speed control systems of high-speed passenger elevators and other lifting-transcripTHbix mechanisms.

I The aim of the invention is to reduce the start-up time by compensating for the moment of friction when using a lift; a gearless installation with mechanical gear;

; FIG. 1 shows the functional; on the device; in fig. 2 - the same non-linear block.

; The device (Fig. 1) contains a node 1 for adjusting the rotational speed of the engine | 2 of the hoisting machine, powered by the rotation speed sensor 3, the outputs of which are connected to one input of the driver 4, proportional to the change in the position of the cab relative to the rear, the other input connected to the output of the motion intensity setting unit 5. The inputs of the setting device 5 are connected to the outputs of the block 6 of time stamps associated with the driver 4 and the control unit 7 of the brake 8.

Node 1 includes a controller 9, a summing amplifier 10, and a thyristor voltage regulator 11. To one of the inputs of the amplifier 10 is connected to a nonlinear unit 12.

To the point 16, the bias voltage, and others to the outputs of the elements 2I-NOT 17 and 18.

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The device works as follows.

When receiving from the automation system of the elevator command on the movement of block 6 (Fig. 1)

Block 12 (Fig. 2) contains an operation 30 at the input of node 1, or rather, at the input of the regulator; Amplifier 13 with a limiter 14 in the center-9.

: feedback feedback, key elements 14B at the point in time, and

: and 15, one inputs of which are connected to i-namely at the moment of the beginning of the movement of the cabin

and balancing the moment of loading with the driving moment of the engine 2, the frequency of the given speed from the output of setpoint 5 is zero and the whole process of balancing and controlled movement of the elevator car is determined by the signals of sensor 3, as well as the output signal of the shaping unit 4. It commands the termination of electric 40 its second input signal, the frequency of the mechanical brake 8 in the control unit 7 which is proportional to the angular part of the brake, as a result of which the rotation of the rotation shaft of the engine 2, is transformed mechanically and the brake system and the engine shaft 2 is applied load torque. In this case, for the implementation of leveling-up, block 6 generates a logical command for starting the intensity setter 5, which generates first a command to switch on the nonlinear block 12, and after a short shutter speed

0.2-0.3 seconds from a command to a sweep-50 starting position, with movement of the movement diagram. At the same time, the output is carried out in a closed-in-speed signal and a block 12, the polarity of which to the position of the system, which ensures that the specified accuracy of the specified displacement of the engine 2 and has a fixed value in amplitude, is given a predetermined direction, is fed to four

Evil 1 input to amplifier input 10 and 55 position.

with the driver 4 to the analog output signal, the polarity of which is uniquely determined by the levels of the logical directional signals. Under the action of the input signal, which is the position error signal in this case, the node 1 begins to work out the specified movement, tries to return the lift car and after the end of the equilibration phase the elevator car returns to the initial 5

voltage 11 in such a way that a small change in the speed reference signal and, consequently, the voltage regulation angle and in the final calculation of the motor torque of the engine 2 becomes sufficient to start the movement of the elevator car along a given optimal movement pattern without distorting it , due to the fact that the introduction of the signal of the nonlinear unit 12 into the control channel allows the movement to start with zero initial conditions. In the event that the load moment is greater than the mechanical friction moment in the mechanical part, balancing the static load moment with the engine torque and returning the cabin to its initial position is provided by activating the position contour formed by the driver 4 and the speed sensor 3, which uses a photo pulse speed sensor, having two output signals; the first is the frequency, corresponding to the angular frequency of the engine shaft ruling, and the second is the logical signal of the direction of rotation. In this case, the shaper 4 receives four control signals: a speed reference signal in the form of a clock-pulsed signal; a motor speed feedback signal in the form of a pulse frequency signal; logical signal of the direction of rotation of the engine 2 and the lift signal. The output signals of the driver 4 and the sensor 3 speeds come

those rotation of the motor shaft 2, converts5

with the driver 4 to the analog output signal, the polarity of which is uniquely determined by the levels of the logical directional signals. Under the action of the input signal, which is the position error signal in this case, the node 1 begins to work out the specified movement, trying to return the cabin to the exact accuracy of working out the specified variable position.

after the end of the equilibration phase, the elevator car returns to

leads to the displacement of the initial value of r: i; i regulation of the thyristor regulation After the termination of the mode of balancing the load torque with the driving moment

motor 2 and returning the elevator car to its original state, carried out in 0.2-0.3 s, the elevator car smoothly accelerates under the influence of the frequency-pulse control signal of the setting device 5, which changes according to the optimal law with the restriction of the first and second derivatives speed. The control system remains for the entire movement path closed in position using shaper 4, which ensures high accuracy of maintaining a given speed, about 1%, a small dynamic error in a position no more than 5 mm, and high accuracy at a given floor level, not worse than ± 1.0 mm

The shaper is made in the form of a digital controller with the presentation of analog information about the position mismatch at the expense of enabling a digital-to-analog converter at the output and performs a continuous count of pulses of frequency-pulse signals fed to its inputs, i.e. in effect, it integrates algebraic frequency difference.

Nonlinear unit 6 (Fig. 2) compensates for the static resistance impedance in the mechanical part of the elevator. Input commands arriving at the inputs of logic elements 2I-NE 17 and 18, depending on the chosen direction of movement of the elevator car, include one of the elements 14 or 15. If there are no specified commands, i.e. at the inputs of elements 2I-NOT 17 and 18 there is a code "001 or" 00, both elements 14 and 15 are turned off. When element 15 is switched on, the bias voltage from source 16 through closed element 15 is applied to the input of operational amplifier 13, the output voltage of which is limited by limiter 14 at the required level. If element 14 is closed, the voltage of source 16 is applied to the input of amplifier 13. Thus, the output voltage of FIG. g

Compiled by L. Reznikov

Tehred I. VeresKorrektor, 1. Patan

Circulation 691 Subscription

VNIIPI USSR State Committee for Inventions and Discoveries

1 13035, Moscow, Zh-35, Raushsk nab., 4/5 Production and Printing Enterprise, Uzhgorod ul. Posctct 4

Editor G. Volkova Order 3834/21

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The life of the nonlinear unit 12 is determined by the magnitude of the limiter limiter 14, and its polarity is specified by the source 16.

Claims (2)

Invention Formula . A device for controlling the launch of a high-speed elevator, which contains a node for ly- ing the rotational speed of the engine of an elevated machine, to one of the INPUT of which the speed sensor Vran1C is connected to the engine, and the other is connected to an i-rate control unit connected to one output of the unit temporary: current, other and third outputs of which are connected to the input of the brake control unit on one of the signal-shaping inputs, it is assumed to be proportional to the first change;:: cabs with respect to a predetermined, others are connected: to the outputs and a motor speed sensor, 1, and a motion intensity control device, characterized in that, in order to reduce the start time and the compensation of the training moment when using the lift. ynrHOHKKii with gearless transmission, it is equipped with a nonlinear block , the output of which is connected to the third input of the node re; l - ly the rotational speed of the engine, and the first, second and third inputs - with the i-outputs of the driver of the intec-spc: - motion. 2. The device according to claim. 1, OFF: 1ЧУи {е С: -: by the fact that a nonlinear block contains an operating system connected at its output: a cell with a limiting 1. in the feedback circuit of the latter and with those connected to ei r. These are key elements, one inputs of which are connected to the bias voltage source, and elements 2I – NOT, one of the inputs of the curtains. They are connected and are one of the inputs of the nonlinear unit, others. i; the third inputs of which are the other inputs of the elements 2I-NOT. (.