EP2303744A2 - Procede de reglage de la boucle de vitesse d'un variateur de vitesse - Google Patents
Procede de reglage de la boucle de vitesse d'un variateur de vitesseInfo
- Publication number
- EP2303744A2 EP2303744A2 EP09779628A EP09779628A EP2303744A2 EP 2303744 A2 EP2303744 A2 EP 2303744A2 EP 09779628 A EP09779628 A EP 09779628A EP 09779628 A EP09779628 A EP 09779628A EP 2303744 A2 EP2303744 A2 EP 2303744A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- speed
- motor
- load
- control loop
- total mass
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 27
- 230000001105 regulatory effect Effects 0.000 abstract 2
- 238000005259 measurement Methods 0.000 description 9
- 230000001360 synchronised effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B1/00—Control systems of elevators in general
- B66B1/24—Control systems with regulation, i.e. with retroactive action, for influencing travelling speed, acceleration, or deceleration
- B66B1/28—Control systems with regulation, i.e. with retroactive action, for influencing travelling speed, acceleration, or deceleration electrical
- B66B1/30—Control systems with regulation, i.e. with retroactive action, for influencing travelling speed, acceleration, or deceleration electrical effective on driving gear, e.g. acting on power electronics, on inverter or rectifier controlled motor
Definitions
- the present invention relates to a method of adjusting a speed control loop of a variable speed drive, the variable speed drive controlling a synchronous or asynchronous electric motor for driving a hoist load, in particular a booth. elevator.
- a variable speed drive usually comprises a control system having a motor speed control loop and a current regulation loop sent on the various phases of the motor.
- a hoisting application especially in an elevator, it is particularly important to adjust the parameters of the current control and speed control loops of the speed controller controlling the hoist motor of the cab. Indeed, the correct setting of these control loops directly affects firstly the overall performance of the elevator and secondly the feelings of comfort and safety that are perceived by the elevator users. However, this adjustment is sometimes long and / or complicated to implement at the time of commissioning of the drive controller.
- the document US5929400 already describes a method allowing automatic commissioning of a variable speed drive in a lifting application.
- this method includes a pre-start pre-calibration phase during which it is in particular necessary to inject current into the motor by keeping the rotor locked.
- JP 08 012206 shows a device for adjusting the speed control loop of an elevator. This device nevertheless requires the use of a load sensor to determine the actual mass of the elevator car, so as to automatically adjust the proportional gain of the speed control loop.
- the invention therefore aims to facilitate and simplify the commissioning of a variable speed drive driving a hoist motor, by providing an estimate of the proportional gain and the integral gain of the speed control loop.
- These gains are calculated based only on a small number of user parameters to be filled in, without requiring current injection steps, which makes it possible to simply have a preset of the speed regulation loop.
- this setting is done off-line, ie the gains are calculated only once from the parameters entered, and no longer requires adjustment of the gains according to the actual mass of the load during the operation of the elevator.
- the method is therefore simple and economical because it does not require a load sensor.
- said parameters to be filled in correspond advantageously to known physical quantities of the application. As they are easily identifiable, these physical quantities can thus be very simply introduced by a user.
- the invention thus makes it possible to reduce the time and the cost of implementing a variable speed drive in a hoisting application, for example of the elevator type.
- the invention describes a method of adjusting a speed control loop of a variable speed drive which is intended to drive a motor connected to a lifting load.
- the method comprises a step of calculating a proportional gain and an integral gain of the speed regulation loop, as a function of the linear nominal speed of the car, the nominal frequency of rotation of the motor, the number of pairs motor poles and the total mass of the load.
- the total mass is a predetermined parameter not measured by a sensor.
- the load comprises an elevator car and the total mass of the load is proportional to the nominal capacity of the elevator car, to the mass of the elevator car or to the mass of a counterweight of the elevator car.
- the method therefore takes into account not only the mass of the elevator car but the total mass of the entire system.
- the method also comprises a step of calculating an inertia of the motor as a function of the nominal torque of the motor and the number of pairs of poles of the motor, in order to refine the calculation of the proportional gain and the integral gain of the loop. speed control.
- the method also comprises a step of calculating a filtering time constant of the speed measurement as a function of the nominal torque of the motor and information representative of the resolution of a speed measurement encoder. of the motor, to refine the calculation of the proportional gain and the integral gain of the speed control loop.
- FIG. 1 represents a partial view of a control system of a variable speed drive controlling a motor
- Figure 2 shows a simplified block diagram according to the invention of the calculation of the proportional gain K P and the integral gain Ki of the speed control loop.
- a variable speed drive comprises a control system for the purpose of driving an electric motor M.
- the motor M is a synchronous or asynchronous motor which is intended to drive a lifting load, for example an application.
- elevator type In this type of application, the load (not shown in the figures) then mainly comprises an elevator car, its counterweight and associated cables.
- the drive control system includes a speed controller 5 which performs a speed control loop.
- the speed controller 5 receives as input a setpoint from a deviation between a reference speed V M engine rotational ref and a velocity measurement V my engine rotation M.
- the speed controller 5 uses a proportional gain K P and an integral gain K i to effect the speed control loop.
- the output of the speed controller 5 provides a reference of the motor torque current lq ref .
- the speed measurement V mes is provided for example by a measurement module 9.
- the drive control system also performs a common regulation loop. For this purpose, it comprises a current regulator 6 of torque Iq and a current regulator 7 of flow Id.
- the torque current regulator 6 receives as input a reference coming from a difference between the reference of the torque current lq ref and a measurement of the torque current lq mes -
- the outputs of the current regulators 6 and 7 are then transformed into variable currents sent on each phase of the motor M by a transformation module 8.
- FIG. 2 presents a block diagram showing different calculation blocks of the speed controller control system, making it possible to estimate a proportional gain K P and an integral gain K i of the speed regulation loop, according to the invention. These gains K P and Ki are used by the cruise control 5 to perform the speed control loop.
- a first calculation block 10 has the function of determining the total mass M to t of the displaced load.
- a second calculation block 20 has the function of determining the inertia of the load J
- a third calculation block 30 has the function of determining K P and Ki using the inertia of the load J
- the third calculation block 30 can use a value of the motor inertia J word calculated in a fourth calculation block 40. Similarly, the third calculation block 30 can use a value of bandwidth coefficient calculated in a fifth Calculation block 50 (see details below).
- 0a d takes into account the inertia of the elevator car when it is loaded with a nominal capacity of the elevator as well as the inertia of the counterweight of the cabin, outside the inertia of the engine.
- the inertia of the lift cables is considered negligible.
- the nominal motor rotation frequency F nom represents the nominal rotor rotation frequency of the motor.
- the nominal rotation frequency of the motor F name corresponds to the stator power supply frequency.
- the rated rotational frequency of the motor F nom corresponds to the power supply frequency of the stator multiplied by a slip coefficient which is less than 1. This sliding coefficient can be considered as fixed for the nominal operating point.
- the inertia of the hoisting motor J mo t is chosen to be a fixed value which is predetermined in the variable speed drive without the intervention of a user.
- the total inertia of the application J to t is then determined as follows:
- the third block 30 then calculates the proportional gain K P and the integral gain K i of the speed control loop. For this, the third block 30 uses the following formulas: where oc coefficient corresponds to a bandwidth of the speed control loop (sometimes referred to or BP) and ⁇ corresponds to an attenuation coefficient (also called coefficient of stability) of the speed control loop. In the first embodiment, the values of these coefficients oc and ⁇ are fixed and predetermined in the variable speed drive, at values of Oc 0 and ⁇ 0, respectively .
- the method of adjusting the speed regulation loop therefore comprises a step of calculating the gains K P and K
- the K P and K i are only calculated according to the following user parameters: linear nominal speed V load name , nominal rotation frequency F motor name , number of P N pole pairs of the motor and total mass M to t the displaced load.
- the parameters F name! PN and V name correspond to physical quantities that are readily known by a user for a given application, while the total mass M to t can be difficult to know for a user.
- the invention thus also proposes a simple estimate of the total mass M to t.
- the total mass M to t of the displaced load is equal to the sum of the mass of the empty cab M cab , the mass of the counterweight M ctp of the cab and the mass M
- the total mass M to t is proportional to the Mioad nominal capacity of the elevator car corresponding to a physical quantity which is readily known by a user for a given lift.
- 0a d of the cabin can be entered by the user from a maximum number of people (for example 8 people) or directly from the equivalent weight (for example 600 Kg, taking an average of 75 Kg per person) .
- the total mass M to t is proportional to the mass of the empty elevator cabin M c or to the mass of the counterweight M ctp of the elevator car.
- the mass of the counterweight M ctp is approximately equal to the mass of the empty cabin M cab increased by half the nominal capacity M
- the mass of the empty cab M cab is approximately equal to the nominal capacity M
- the total mass M is proportional to t for each of the three physical quantities, allowing to quickly make an estimate.
- the user has the choice to enter only one of these physical quantities, so that the first calculation block calculates an estimate of the total mass M to t of the displaced load.
- the inertia of the lifting motor J mo t is not fixed and predetermined, but can be calculated in the fourth block 40 of calculation, as a function of the number of pairs of poles of the motor P N and the nominal torque of the motor T N.
- the user To calculate an inertia of the hoisting motor J mo t, the user must therefore enter an additional parameter, namely the nominal torque of the motor T N which is an easy parameter to enter because it also corresponds to a known physical quantity of the engine.
- This second embodiment makes it possible to improve the value of the total inertia of the application J to t and thus to refine the calculation of the gains K P and K
- the inertia of the motor J word is calculated as being equal to:
- Jmot J ⁇ * (T N / TQ) '* P N / 2 wherein T 0 represents a constant base pair equal to 1 N. m and in which Jo represents a fixed coefficient of inertia which is chosen to be substantially equal to 10 -5 kg.m 2 .
- a third embodiment makes it possible to further refine the calculation of the gains K P and K
- the control method calculates a value of the bandwidth OCAI ⁇ band coefficient, instead of taking the predetermined fixed value Oc 0.
- the fifth calculation block 50 calculates a time constant T f , ⁇ t for the filtering of the speed measurement made by the measurement module 9.
- This time constant T TM lies between a minimum value T f
- tm ⁇ n is determined from the nominal torque of the motor T N and the resolution N s of an encoder used to measure the speed of rotation V mes of the motor, in the case where this speed of rotation is measured.
- tm ⁇ n is for example chosen to have a maximum noise of 2% compared to the nominal torque T N.
- the maximum value T fl ⁇ t ma ⁇ is imposed by the stability limits of the control system of the variator.
- t is equal to T fl
- ⁇ cai ((N s N * T) / (1000 * ⁇ * Jtot)) l / 2
- the user in order to calculate an ocai value of the bandwidth coefficient ⁇ , the user must therefore provide an additional parameter, namely the encoder resolution N s, which is an easy parameter to be informed because it also corresponds to a physical quantity known to the user. application.
- the invention thus determines the proportional gain K P and the integral gain K i of the speed control loop by using predetermined and known functional parameters, without the need for a measurement sensor.
- the method is therefore very simple because the calculation of the gains K P and Ki can be performed once "off-line", that is to say before the actual operation of the elevator, since the gains do not need to be recalculated or readjusted in real time.
Landscapes
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Elevator Control (AREA)
- Control Of Electric Motors In General (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0854388A FR2933249B1 (fr) | 2008-06-30 | 2008-06-30 | Procede de reglage de la boucle de vitesse d'un variateur de vitesse |
PCT/EP2009/056835 WO2010003740A2 (fr) | 2008-06-30 | 2009-06-03 | Procede de reglage de la boucle de vitesse d'un variateur de vitesse |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2303744A2 true EP2303744A2 (fr) | 2011-04-06 |
EP2303744B1 EP2303744B1 (fr) | 2015-09-23 |
Family
ID=40259142
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP09779628.8A Active EP2303744B1 (fr) | 2008-06-30 | 2009-06-03 | Procede de reglage de la boucle de vitesse d'un variateur de vitesse |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP2303744B1 (fr) |
JP (1) | JP2011526233A (fr) |
CN (1) | CN102076589A (fr) |
ES (1) | ES2550948T3 (fr) |
FR (1) | FR2933249B1 (fr) |
WO (1) | WO2010003740A2 (fr) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6557185B2 (ja) * | 2016-07-06 | 2019-08-07 | ファナック株式会社 | サーボ制御装置、サーボ制御方法、及びサーボ制御用プログラム |
CN109095301B (zh) * | 2018-09-25 | 2020-11-24 | 日立楼宇技术(广州)有限公司 | 一种电梯控制方法、装置、设备和介质 |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3344087B2 (ja) * | 1994-07-01 | 2002-11-11 | 三菱電機株式会社 | エレベーターの制御装置 |
JPH1053378A (ja) * | 1996-06-07 | 1998-02-24 | Otis Elevator Co | エレベータの速度制御回路 |
JPH11193190A (ja) * | 1997-12-26 | 1999-07-21 | Toshiba Corp | エレベータ速度制御装置 |
JP2002171778A (ja) * | 2000-09-25 | 2002-06-14 | Aisin Seiki Co Ltd | 電動モータの振動抑制制御装置及び電動モータの振動抑制制御における設計手法 |
JP4283056B2 (ja) * | 2003-07-24 | 2009-06-24 | 三菱電機株式会社 | 電動機の制御装置 |
-
2008
- 2008-06-30 FR FR0854388A patent/FR2933249B1/fr not_active Expired - Fee Related
-
2009
- 2009-06-03 CN CN2009801254708A patent/CN102076589A/zh active Pending
- 2009-06-03 ES ES09779628.8T patent/ES2550948T3/es active Active
- 2009-06-03 WO PCT/EP2009/056835 patent/WO2010003740A2/fr active Application Filing
- 2009-06-03 JP JP2011515278A patent/JP2011526233A/ja active Pending
- 2009-06-03 EP EP09779628.8A patent/EP2303744B1/fr active Active
Non-Patent Citations (1)
Title |
---|
See references of WO2010003740A3 * |
Also Published As
Publication number | Publication date |
---|---|
JP2011526233A (ja) | 2011-10-06 |
WO2010003740A3 (fr) | 2010-06-10 |
WO2010003740A2 (fr) | 2010-01-14 |
ES2550948T3 (es) | 2015-11-13 |
EP2303744B1 (fr) | 2015-09-23 |
CN102076589A (zh) | 2011-05-25 |
FR2933249B1 (fr) | 2010-07-30 |
FR2933249A1 (fr) | 2010-01-01 |
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