Ascensores electrónicos y variadores de velocidad. (Spanish Edition)

In this type of application, the load not shown in the figures therefore consists mainly of an elevator car, counterweight and their associated cables. The control system comprises a drive regulator 5 that performs a speed control loop speed. In known manner, the controller 5 receives in input speed a slogan from a deviation between a speed reference Vref rotation of the motor M and Vmeas measuring rotation speed of the motor M.

The controller 5 uses a speed gain KP proportional and integral gain KI to perform the speed control loop. La salida del regulador 5 de velocidad proporciona una referencia Iqref de la corriente del par motor. The output controller 5 provides a speed reference Iqref torque current. The MMed speed measurement is provided for example a module 9 measurement. The drive control system also performs a control loop current. Para ello, consta de un regulador 6 de corriente de par Iq y de un regulador 7 de corriente de flujo Id.

To this end, it comprises a regulator 6 of torque current Iq and a regulator 7 current flow Id. The controller 6 torque current receives in input a setpoint from a deviation between the Iqref reference torque current Iqmed measurement and torque current. The outputs of the regulators 6 and 7 are transformed current then flows in variables sent in each phase of the motor M by a module 8 transformation.

Figure 2 presents a summary table showing different calculation blocks of the control system of the variable speed drive, which allows to estimate a KP proportional gain and an integral KI loop gain speed control, according to the invention. These gains KP and KI uses the controller 5 to perform the speed control loop speed. A first calculation block 10 has the function of determining the total mass of the displaced load Mtot. A second calculation block 20 has the function of determining the load inertia Jload using the total mass Mtot calculated in the first block A third calculation block 30 has the function of determining KP and KI Jload using the calculated load inertia in the second block Optionally, the third calculation block 30 may use a value calculated Jmot motor inertia on the fourth calculation block Similarly, the third calculation block 30 may use a coefficient value calculated bandwidth in a fifth block 50 of calculation see details below.

In the case of an elevator, the Jload load inertia takes into account the inertia of the elevator when it is loaded with a nominal capacity of the lift and the inertia of the counterweight cab outside motor inertia. La inercia de los cables del ascensor se considera insignificante. The inertia of the elevator cables is considered insignificant.

The Jload load inertia is calculated from the following parameters: The nominal frequency Fnom engine rotation represents the nominal frequency of rotation of the motor rotor.

In the case of a synchronous motor, the nominal frequency Fnom engine rotation corresponding to the frequency of power to the stator. Este coeficiente de deslizamiento se puede considerar fijo para el punto nominal de funcionamiento. In the case of an asynchronous motor, the nominal frequency Fnom engine rotation frequency corresponding to the power of the stator multiplied by a slip coefficient is less than 1.

This slip coefficient can be considered fixed for the nominal point functioning.

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According to a first simple embodiment, the inertia Jmot hoist motor is selected as a fixed value that is predetermined in the drive controller without user intervention. Jtot total inertia of the application is determined thus as follows: The third block 30 then calculates the proportional gain KP and the integral gain KI loop speed control. To do this, the third block 30 uses the following formulas: The adjustment procedure of speed control loop comprises, therefore, a step of calculating the gains KP and KI.

Advantageously, the KP and KI are calculated solely on the basis of the following user parameters: The Fnom, PN and Vnom parameters correspond to a physical quantities easily know a user for a given application, while the total mass Mtot can be more difficult to learn for a user. The invention proposes, therefore, also a simple estimate of the total mass Mtot. The total Mtot mass of the displaced load is equal to the sum of the mass Mcab empty cab mass MCTP counterweight cabin and mload mass corresponding to the nominal installed capacity on board the elevator car, ignoring the mass of cables.

Preferably, the total mass Mtot is proportional to the nominal capacity mload the elevator car corresponding to a physical quantity that a user easily knows for a given lift. Thus, indicating only the nominal capacity of the cabin, the first block 10 is able to estimate total mass Mtot load. Regardless, this nominal capacity mload cabin the user can enter from a maximum number of persons for example 8 persons or directly from the equivalent weight for example kg, considering an average of 75 kg per person.

Similarly, the total mass Mtot is proportional to the mass Mcab cabin empty elevator or counterweight mass MCTP of the elevator car. These two parameters also correspond to a readily known a user for a given application physical quantities. The calculation rules used are, in effect, the following: Se obtiene, por tanto: It is thus obtained: Mtot total mass is therefore proportional to each of the three physical quantities, which allows quickly to estimate this.

The user has the choice of introducing only one of these physical quantities, for the first calculation block 10 calculates an estimate of the total mass of the displaced load Mtot.

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Obviously they can use similar rules for estimating the total mass Mtot. Moreover, if the user is able to know each of the three physical quantities: According to a second embodiment, the Jmot inertia lift motor is not fixed and predetermined, but can be calculated in the fourth block 40 for calculating, as a function of the number of pole pairs PN engine and torque TN nominal engine.

To calculate an inertia Jmot lift motor, the user must therefore introduce an additional parameter, that is the nominal motor torque TN is a parameter easy to introduce and also corresponding to a physical quantity known engine.

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Cambio Variador MP- JP Ascensores

Spanish term or phrase: Torque ripple generated in the motor is one of the causes of the Maria Luisa Duarte Spain Local time: English, Portuguese PRO pts in pair: Peer comments on this answer and responses from the answerer agree. Login to enter a peer comment or grade.