JP6643219B2 - Magnetic pole diagnostic device for permanent magnet synchronous motor for elevator - Google Patents

Description

  The present invention relates to a magnetic pole diagnostic device for diagnosing magnetic pole deviation of a permanent magnet synchronous motor used for an elevator.

  In recent elevators, a permanent magnet synchronous motor having low loss and high efficiency is used as a driving motor. Here, the permanent magnet synchronous motor is a motor that rotates at a stable rotation speed when the rotation speed and the frequency command match.

  In a permanent magnet synchronous motor, in order to output an optimal torque, it is necessary to supply a motor current with a phase matching a magnetic pole position. Therefore, generally, a rotary encoder for detecting a magnetic pole position is installed in a motor, and the phase of the motor is set using U, V, and W phase pulses of the rotary encoder.

  When a rotary encoder is mounted on a permanent magnet synchronous motor, that is, during elevator manufacturing / shipping inspection, or on-site installation / start-up, the magnetic pole position used as a control reference is set to the optimal magnetic pole position where the motor current is minimized. Initialized.

  However, even if the optimum magnetic pole position is set once, if the shaft of the rotary encoder is worn and rattle occurs, or if the magnetic pole shifts when the rotary encoder is replaced or detached, the optimum motor control is performed. It will be difficult. Also, at this time, if the magnetic pole deviation becomes large, the motor cannot output the optimum torque, and it becomes difficult to perform normal operation such as vibration of the elevator or stop of the elevator.

  On the other hand, as a conventional technology for diagnosing a magnetic pole shift of a permanent magnet synchronous motor for an elevator, a conventional technology described in Patent Document 1 is known. In this technology, the correctness of the signal of the magnetic pole position detector which outputs the magnetic pole position signal according to the magnetic pole position of the permanent magnet synchronous motor is different from the actual load flowing through the motor by more than a predetermined value. If so, it is determined that there is an abnormality and the elevator is stopped.

JP 2000-134976 A

  In the above-described prior art, when an abnormality is detected, the elevator is stopped, so that there is a problem that the non-operating time becomes long and the convenience of passengers is reduced.

  Therefore, the present invention provides a magnetic pole diagnostic device for a permanent magnet synchronous motor for an elevator, which can reduce the downtime of the elevator.

In order to solve the above-mentioned problems, a magnetic pole diagnostic device for a permanent magnet synchronous motor for an elevator according to the present invention is configured such that the permanent magnet controlled by a motor current having a phase corresponding to a magnetic pole position of the permanent magnet synchronous motor detected by a rotary encoder. Provided in an elevator driven by a synchronous motor, for diagnosing a magnetic pole position shift , storing a set value of a motor current serving as a reference value of the motor current, and setting a motor current in a predetermined elevator operating state. Based on the comparison between the value and the measured value of the motor current detected by the current sensor, a magnetic pole abnormality diagnostic unit that diagnoses the presence or absence of an abnormality in the magnetic pole position, and when the magnetic pole abnormality diagnostic unit diagnoses that there is an abnormality in the magnetic pole position, A magnetic pole position adjusting unit for correcting the magnetic pole position , and further includes any one of the following first to third means.
In the first means, the magnetic pole position adjusting section corrects the magnetic pole position by adding or subtracting a predetermined amount when the magnetic pole abnormality diagnosing section detects abnormality in the magnetic pole position. Based on a comparison between the measured value of the motor current measured in accordance with the above and the set value of the motor current, the presence or absence of an abnormality in the magnetic pole position is diagnosed again.
In the second means, when the magnetic pole abnormality diagnostic unit detects abnormality in the magnetic pole position, the magnetic pole position adjusting unit corrects the magnetic pole position by one of addition and subtraction of a predetermined amount, and the magnetic pole abnormality diagnostic unit corrects the magnetic pole position. Based on the comparison between the measured value of the motor current measured in accordance with the magnetic pole position and the set value of the motor current, the presence / absence of abnormality in the magnetic pole position is diagnosed again. As a result of diagnosing the presence or absence, if the magnetic pole position is again diagnosed as having an abnormal magnetic pole position, and the measured value of the motor current measured according to the corrected magnetic pole position is equal to or larger than the measured value of the motor current before correction, The magnetic pole position adjuster corrects the magnetic pole position by adding or subtracting a predetermined amount.
In the third means, when the magnetic pole abnormality diagnostic unit detects an abnormality in the magnetic pole position, the magnetic pole position adjusting unit corrects the magnetic pole position by one of addition and subtraction of a predetermined amount, and the magnetic pole abnormality diagnostic unit corrects the magnetic pole position. Based on the comparison between the measured value of the motor current measured in accordance with the magnetic pole position and the set value of the motor current, the presence / absence of abnormality in the magnetic pole position is diagnosed again. As a result of diagnosing the presence / absence, if the measured value of the motor current measured according to the corrected magnetic pole position is smaller than the measured value of the motor current before correction, The magnetic pole position adjuster corrects the magnetic pole position by one of addition and subtraction of a predetermined amount.

  According to the present invention, the diagnosis and correction of the magnetic pole position can be automatically performed during the operation of the elevator. Therefore, the non-operating time of the elevator due to the diagnosis of the magnetic pole position can be reduced.

  Problems, configurations, and effects other than those described above will be apparent from the following description of the embodiments.

1 is a configuration diagram of a magnetic pole diagnostic device of a permanent magnet synchronous motor for an elevator according to an embodiment of the present invention. It is a process flowchart which shows the recording means of the motor current initial value of a permanent magnet synchronous motor. It is a flowchart which shows the process regarding magnetic pole abnormality diagnosis of a permanent magnet synchronous motor, and magnetic pole correction.

  An embodiment of the present invention will be described below with reference to the drawings. In each of the drawings, components having the same reference numerals indicate the same components or components having similar functions.

  FIG. 1 is a configuration diagram of a magnetic pole diagnostic device of a permanent magnet synchronous motor for an elevator according to an embodiment of the present invention.

  In FIG. 1, 1 is an elevator car, 2 is a main rope made of a wire rope, 3 is a counterweight, 4 is a hoisting machine driven by a permanent magnet synchronous motor (PM), and 5 is magnetic pole position detection. A rotary encoder (RE) that is directly connected to a permanent magnet synchronous motor as a unit and generates U, V, and W phase pulses. 6 is a car load detector for detecting the load in the car 1, 7 is a three-phase power supply, 8 is an inverter (INV), and 9 is a current detector (CT) for detecting the current of the permanent magnet synchronous motor. is there.

  A car 1 and a counterweight 3 are connected to both ends of the main rope 2, respectively. As the main rope 2 is wound around the sheave of the hoisting machine 4, the car 1 and the counterweight 3 are suspended in a hoistway (not shown). When the hoist 4 is driven by the permanent magnet synchronous motor to rotate the sheave, the main rope 2 is frictionally driven by the sheave. Thereby, the car 1 and the counterweight 3 move up and down in the hoistway.

  The permanent magnet synchronous motor is driven at a variable speed by three-phase AC power output from the inverter device 8. The inverter device 8 converts the constant-voltage / constant-frequency three-phase AC power input from the three-phase power supply 7 into DC power, and further converts the DC power into a variable-voltage variable-frequency three-phase AC power and outputs the same. The inverter device 8 is controlled by a speed control unit (not shown) provided in a control device (10) described later. That is, the inverter device 8 is controlled so as to output three-phase AC power such that the speed of the permanent magnet synchronous motor detected based on the signal of the rotary encoder 5 matches the speed command. More specifically, the speed control unit creates a current command that matches the detected speed with the speed command, and controls the inverter device 8 so that the current detected by the current detector 9 matches the current command. I do. At this time, the speed control unit controls the inverter device 8 based on the signal of the rotary encoder 5 so as to output three-phase AC power at a phase corresponding to the magnetic pole position of the permanent magnet synchronous motor. Since such a speed control unit is well known, further detailed description is omitted.

  Reference numeral 10 denotes a control device (CPU) that executes a series of processes relating to diagnosis and correction of the magnetic pole position. Numeral 11 denotes a magnetic pole position detecting unit for detecting a signal from the rotary encoder 5, 12 denotes a current detecting unit for measuring a current of the permanent magnet synchronous motor based on a signal from the current detector 9, and 13 denotes a current from the load detector 6 in the car. The in-car load detecting unit detects the in-car load by the signal of (1). Numeral 14 denotes a magnetic pole abnormality diagnosis unit, which is based on a descending traveling command from the operation control unit 16, a motor current measurement value from the current detection unit 12, and a car unload (unmanned) signal from the car internal load detection unit 13. Next, the presence or absence of an abnormality such as a deviation in the magnetic pole position is diagnosed. Further, the magnetic pole abnormality diagnosis unit 14 has a function of notifying the monitoring center 22 of the abnormality via the communication line 21 such as a telephone or the Internet when the abnormality is detected. Reference numeral 15 denotes a magnetic pole position adjusting unit, which performs magnetic pole position adjustment based on a signal from the magnetic pole position detecting unit 11 when the magnetic pole abnormality diagnosing unit 14 determines that magnetic pole position adjustment is necessary. Then, based on the traveling command from the operation control unit 16 and the magnetic pole position signal from the magnetic pole position adjusting unit 15, the inverter control unit 17 controls the inverter so that the motor current flows in a phase matching the magnetic pole position of the permanent magnet synchronous motor. The device 8 is controlled.

  In the present embodiment, the control device 10 includes an arithmetic processing device, and functions as each unit (11 to 17) by executing a predetermined program.

  Hereinafter, diagnosis and correction of the magnetic pole position will be described with reference to FIG. 1 and further with reference to FIGS. 2 and 3.

  FIG. 2 is a processing flow chart showing the recording means of the motor current initial value of the permanent magnet synchronous motor. FIG. 3 is a flowchart showing processing related to magnetic pole abnormality diagnosis and magnetic pole correction of the permanent magnet synchronous motor.

  First, a motor current initial value setting unit will be described with reference to FIG. 2 while referring to FIG.

  In step S1 in FIG. 2, a known motor magnetic pole (not shown) provided in the control device 10 is used to acquire magnetic pole position data θ to be a reference in the motor control at the time of elevator manufacture / shipment inspection or on-site installation / startup. The position adjustment function is used. Next, in step S2, it is determined whether the magnetic pole position data θ has been set. If it is determined that the magnetic pole position data θ has been set (Y in S2), the magnetic pole position data θ is stored in the magnetic pole position adjusting unit 15, and the process proceeds to step S3. . If the magnetic pole position data θ has not been set, that is, if it is not determined in step S3 that the magnetic pole position data θ has been set (N in S2), the process returns to step S1 and the motor magnetic pole position adjusting function is continuously used.

  In step S3, the magnetic pole abnormality diagnosis unit 14 determines whether the elevator has traveled a predetermined number of times (for example, 100 times or more) after the magnetic pole position data θ is set, based on the operation data from the operation control unit 16. You. When it is determined that the vehicle has traveled the predetermined number of times or more (Y in S3), the process proceeds to step S4. If it is not determined that the vehicle has traveled the predetermined number of times or more (N in S3), step S3 is repeatedly executed.

  In step S4, it is determined whether the magnetic pole position data θ has not been changed. When it is determined that the magnetic pole position data θ has not been changed (Y in S4), it is detected that the magnetic pole position data θ has been properly set, that is, the adjustment of the magnetic pole position data θ has been completed. Then, the process proceeds to step S5. If it is not determined in step S4 that the magnetic pole position data θ has not been changed (N in S4), that is, if the magnetic pole position data θ has been readjusted and changed, the process returns to step S3, and the elevator is again set to the predetermined position. It is determined whether the vehicle has traveled the number of times or more.

  In step S <b> 5, the magnetic pole abnormality diagnosis unit 14 determines whether the inside of the car is unloaded (unmanned, unloaded) based on the signal from the in-car load detection unit 13, and outputs a signal from the operation control unit 16. It is determined whether a down (DN) traveling command has been issued based on. Note that the descending (DN) traveling command may be issued when the user calls the elevator with the landing call button. Further, when the magnetic pole abnormality diagnosis unit 14 detects no load in the car, the magnetic pole abnormality diagnosis unit 14 may issue a down traveling command to the operation control unit 16. In step S5, if it is determined that there is no load in the car and a descending traveling command is issued (Y in S5), the process proceeds to step S6, and if not (N in S5), step S5 is repeatedly executed. You.

In step S6, recording the motor current value during descent travel detected by the current detection unit 12 based on the signal of the current detector 9 as the initial value I _0, and stored in the magnetic pole error diagnostic portion 14, the process ends I do. Thereafter, the process proceeds to the magnetic pole diagnosis process and the magnetic pole correction process shown in FIG.

  Next, the magnetic pole diagnosis processing and the magnetic pole correction processing according to the present embodiment will be described with reference to FIG.

  In step S1 of FIG. 3, if the magnetic pole abnormality diagnosis unit 14 detects a no-load in-car and descending traveling command in the same manner as step S5 of FIG. 2, the process proceeds to step S2, in which the motor current value In during descending traveling is measured. The measurement is performed by the detection unit 12.

In step S3, by comparing the magnetic pole error diagnostic portion 14 motor current during descent traveling at values In and the motor current initial value I _0, a difference within a predetermined range, when approximately equal (S3 of Y), A series of processing ends. Also, when the motor current value In and the motor current initial value I ₀ at the time of descending travel is different by more than a predetermined range (S3 of N), abnormality, i.e. it determines that deviation occurs in the magnetic pole position Then, the process proceeds to step S4 to perform the magnetic pole adjustment.

  In step S4, similarly to step S1, when the magnetic pole abnormality diagnosis unit 14 detects a no-load and descending traveling command in the car, the process proceeds to step S5 (Y in S4). In step S5, a command is issued from the magnetic pole abnormality diagnostic unit 14 to the magnetic pole position adjusting unit 15, and the magnetic pole position adjusting unit 15 adds a predetermined amount α ° (for example, 1 °) to the stored magnetic pole position data θ. After that, in step S6, the current detector 12 measures the motor current value Ia during the downward traveling after the adjustment of the magnetic pole position data θ.

Next, in step S7, in magnetic pole error diagnostic portion 14 compares the motor current Ia and the motor current initial value I _0. In step S7, when the motor current value Ia and the motor current initial value I ₀ are different beyond a predetermined range (S7 of N), again, abnormality, i.e. to step S8 as improvement has not been completed move on. The case where the improvement is completed (Y in S7) will be described later.

  In step S8, the motor current value Ia is compared with the motor current value In before the magnetic pole position data θ is adjusted, and if the motor current value Ia is smaller (Y in S8), the improvement is not small. The process proceeds to step S8A. In step S8A, after replacing the motor current In with the motor current Ia, the process returns to step S4 to repeat the same processing to advance the optimization of the magnetic pole position data θ. On the other hand, when the motor current value Ia is not smaller than the motor current In, that is, when Ia is equal to or more than In (N in S8), it is determined that the motor current value Ia has not been improved and the process proceeds to step S9, and the magnetic pole position data θ Is returned to the original data before adjustment (before α ° addition), and the process proceeds to step S10.

  In step S10, similarly to step S4, when the magnetic pole abnormality diagnostic unit 14 detects a no-load and descent traveling command in the car, the process proceeds to step S11 (Y in S10). In step S11, a command is issued from the magnetic pole abnormality diagnostic unit 14 to the magnetic pole position adjusting unit 15, and the magnetic pole position adjusting unit 15 subtracts the magnetic pole position data θ by a predetermined amount α ° (for example, 1 °). Then, in step S12, the motor current value Ib at the time of the downward traveling after the adjustment of the magnetic pole position data θ is measured by the current detecting unit 12.

In step S13, at the magnetic pole error diagnostic portion 14 compares the motor current value Ib and the motor current initial value I _0. In step S13, when the motor current value Ib and the motor current initial value I ₀ are different beyond a predetermined range (S13 of N), the process proceeds to step S14 as not being improved completion. The case where the improvement is completed (Y in S13) will be described later.

  In step S14, the motor current value Ib is compared with the motor current value In before the magnetic pole position data θ adjustment, and if the motor current value Ib is smaller, it is determined that the motor current value Ib has been improved to some extent, and the process proceeds to step S14A. Proceed to. In step S14A, after replacing the motor current In with the motor current Ib, the process returns to step S10 to repeat the same processing to advance the optimization of the magnetic pole position data θ. On the other hand, if the motor current value Ib is not small, that is, if Ia is equal to or more than In (N in S14), it is determined that the motor current value Ib has not been improved, and the process proceeds to step S15. After returning to the original data (before subtraction), the process proceeds to step S16.

  In step S16, the magnetic pole abnormality diagnostic unit 14 notifies the monitoring center 22 via the communication line 21 of an abnormality that the magnetic pole position data θ could not be improved even after the adjustment. Next, proceeding to step S17, the magnetic pole abnormality diagnostic unit 14 issues a command to the operation control unit 16 to lower the traveling speed and the acceleration / deceleration from the normal operation. The operation control unit 16 receives the command and reduces the traveling speed and the acceleration / deceleration to control the inverter control unit 17 so that the operation of the elevator in the low torque / low current state can be continued.

  Next, in step S18, the monitoring center 22 that has received the abnormality notifies the specialist engineer and dispatches the expert engineer to the site. Then, the expert engineer investigates the cause of the magnetic pole abnormality such as the failure or disconnection of the rotary encoder 5 and takes a countermeasure.

On the other hand, in step S7 and step S13, when the motor current value Ia and the motor current initial value _{I 0} are matched within a predetermined range (Y in S7 in Y, S13), the process proceeds to step S19 as an improvement has been completed.

  In step S19, the magnetic pole abnormality diagnostic unit 14 notifies the monitoring center 22 via the communication line 21 that the magnetic pole position data θ has been updated. Then, in step S20, normal operation of the elevator is continued, and in step S21, a next inspection date survey is planned. In accordance with the plan, the expert engineer will investigate the factors that required the adjustment of the magnetic pole position data θ, such as whether the rotary encoder shaft has started to rattle due to wear or the like on the next inspection day, and take measures before the abnormality occurs I do.

  As described above, in the processes of FIGS. 2 and 3, the motor current is measured under the same predetermined operating conditions, that is, during the no-load state and the descent operation in the car. Therefore, the magnetic pole abnormality diagnosis unit can easily compare and calculate the initial value and the measured value of the motor current, and the accuracy of diagnosis is improved. Furthermore, by measuring the motor current when there is no load in the car, the measurement can be performed without being affected by the magnitude of the load or the fluctuation of the motor current due to the movement of the load in the car. Therefore, the accuracy and reliability of the abnormality diagnosis are improved. In addition, since the motor current is measured during the descent operation when the motor current is maximized in the no-load state in the car, the accuracy of the abnormality diagnosis is improved.

In the present embodiment, the initial value of the motor current is set as a reference for abnormality diagnosis. However, the current value is not limited to the initial value, but may be a reference if the current value is in a state where the rotary encoder is properly mounted. Can be set value. For example, after the countermeasure completion by a technician (after S18 completes in FIG. 3), executing the processing operation shown in FIG. 2, it is possible to set the "Settings" replaces the "initial value I _0."

  In addition, the measured current value is corrected to a current value at a reference load (for example, no load) according to the load in the car detected by the load detection unit 13 (FIG. 1), and the corrected current value is calculated. Abnormality diagnosis may be performed based on this.

  Further, in the case of a passenger elevator, the magnetic pole position data is corrected when the car is unmanned. However, it is possible to avoid such a problem that a sudden change in the driving state due to the correction of the magnetic pole position impairs the safety of the passenger. .

  As described above, according to the present embodiment, the magnetic pole abnormality diagnosis unit that compares the set value and the measured value of the motor current in the predetermined operating state of the elevator, and the magnetic pole position data based on the comparison result of the magnetic pole abnormality diagnosis unit By the magnetic pole position adjusting unit to be adjusted, diagnosis and correction of the magnetic pole position can be automatically performed with high accuracy when the elevator is operated (during service operation). Therefore, the non-operation time of the elevator due to the diagnosis and correction of the magnetic pole position can be reduced. Further, according to the present embodiment, even when an abnormality is recognized in the magnetic pole position, the operation of the elevator can be continued. Further, it is possible to detect an abnormal magnetic pole position at an early stage and take measures before the elevator is stopped.

  Note that the present invention is not limited to the above-described embodiment, but includes various modifications. For example, the above-described embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the described configurations. Further, for a part of the configuration of each embodiment, it is possible to add, delete, or replace another configuration.

  For example, FIG. 1 only shows the basic configuration of an elevator, and the above-described magnetic pole diagnostic apparatus can be applied to an elevator having various roping configurations, an elevator without a machine room, an elevator having a machine room, and the like.

DESCRIPTION OF SYMBOLS 1 ... Cage 2 ... Main rope 3 ... Balance weight 4 ... Hoisting machine 5 ... Rotary encoder 6 ... Car load detector 7 ... Three-phase power supply 8 ... Inverter device 9 ... Current detector 10 ... Control device 11 ... Magnetic pole position detection Unit 12: Current detection unit 13: In-car load detection unit 14: Magnetic pole abnormality diagnosis unit 15: Magnetic pole position adjustment unit 16: Operation control unit 17: Inverter control unit 21: Communication line 22: Monitoring center

Claims (8)

An elevator permanent magnet provided in an elevator driven by the permanent magnet synchronous motor controlled by a motor current having a phase corresponding to a magnetic pole position of the permanent magnet synchronous motor detected by a rotary encoder, and diagnosing a shift in the magnetic pole position A magnetic pole diagnostic device for a synchronous motor,
A set value of the motor current serving as a reference value of the motor current is stored, and in a predetermined elevator operation state, based on a comparison between the set value of the motor current and a measured value of the motor current detected by a current sensor. Te, a magnetic pole error diagnostic portion for diagnosing the presence or absence of abnormality of the magnetic pole position,
When the magnetic pole abnormality diagnostic unit diagnoses that the magnetic pole position is abnormal, a magnetic pole position adjusting unit that corrects the magnetic pole position,
Equipped with a,
The magnetic pole position adjusting unit, when the magnetic pole abnormality diagnostic unit detects an abnormality in the magnetic pole position, corrects the magnetic pole position by adding or subtracting a predetermined amount,
The magnetic pole abnormality diagnosis unit diagnoses again whether there is an abnormality in the magnetic pole position based on a comparison between a measured value of the motor current measured according to the corrected magnetic pole position and a set value of the motor current. pole diagnostic apparatus for elevators permanent magnet synchronous motor, characterized in that. A magnetic pole diagnostic device for an elevator permanent magnet synchronous motor according to claim 1,
The magnetic pole abnormality diagnostic unit, again, as a result of diagnosing the presence or absence of an abnormality in the magnetic pole position , again diagnoses that there is an abnormality in the magnetic pole position, and of the motor current measured according to the corrected magnetic pole position A magnetic pole diagnostic device for a permanent magnet synchronous motor for an elevator , wherein the magnetic pole position is returned to the magnetic pole position before correction when a measured value is equal to or greater than a measured value of the motor current before correction . An elevator permanent magnet provided in an elevator driven by the permanent magnet synchronous motor controlled by a motor current having a phase corresponding to a magnetic pole position of the permanent magnet synchronous motor detected by a rotary encoder, and diagnosing a shift in the magnetic pole position A magnetic pole diagnostic device for a synchronous motor,
A set value of the motor current serving as a reference value of the motor current is stored, and in a predetermined elevator operation state, based on a comparison between the set value of the motor current and a measured value of the motor current detected by a current sensor. A magnetic pole abnormality diagnostic unit for diagnosing the presence or absence of an abnormality in the magnetic pole position;
When the magnetic pole abnormality diagnostic unit diagnoses that the magnetic pole position is abnormal, a magnetic pole position adjusting unit that corrects the magnetic pole position,
With
The magnetic pole position adjusting unit, when the magnetic pole abnormality diagnostic unit detects the abnormality of the magnetic pole position, corrects the magnetic pole position by one of addition and subtraction of a predetermined amount,
The magnetic pole abnormality diagnosis unit diagnoses again whether there is an abnormality in the magnetic pole position based on a comparison between the measured value of the motor current measured according to the corrected magnetic pole position and the set value of the motor current. ,
The magnetic pole abnormality diagnosing unit, again, as a result of diagnosing the presence or absence of an abnormality in the magnetic pole position, again diagnosed that there is an abnormality in the magnetic pole position, and of the motor current measured according to the corrected magnetic pole position When the measured value is equal to or larger than the measured value of the motor current before the correction, the magnetic pole position adjusting unit corrects the magnetic pole position by the other of the addition and the subtraction of the predetermined amount . Magnetic pole diagnostic device for permanent magnet synchronous motor. An elevator permanent magnet provided in an elevator driven by the permanent magnet synchronous motor controlled by a motor current having a phase corresponding to a magnetic pole position of the permanent magnet synchronous motor detected by a rotary encoder, and diagnosing a shift in the magnetic pole position A magnetic pole diagnostic device for a synchronous motor,
A set value of the motor current serving as a reference value of the motor current is stored, and in a predetermined elevator operation state, based on a comparison between the set value of the motor current and a measured value of the motor current detected by a current sensor. A magnetic pole abnormality diagnostic unit for diagnosing the presence or absence of an abnormality in the magnetic pole position;
When the magnetic pole abnormality diagnostic unit diagnoses that there is an abnormality in the magnetic pole position, a magnetic pole position adjusting unit that corrects the magnetic pole position,
With
The magnetic pole position adjusting unit, when the magnetic pole abnormality diagnostic unit detects the abnormality of the magnetic pole position, corrects the magnetic pole position by one of addition and subtraction of a predetermined amount,
The magnetic pole abnormality diagnosis unit diagnoses again whether there is an abnormality in the magnetic pole position based on a comparison between the measured value of the motor current measured according to the corrected magnetic pole position and the set value of the motor current. ,
The magnetic pole abnormality diagnosing unit, again, as a result of diagnosing the presence or absence of an abnormality in the magnetic pole position, again diagnosed that there is an abnormality in the magnetic pole position, and of the motor current measured according to the corrected magnetic pole position When the measured value is smaller than the measured value of the motor current before the correction, the magnetic pole position adjusting unit corrects the magnetic pole position by the one of the addition and the subtraction of the predetermined amount. Magnetic pole diagnostic device for permanent magnet synchronous motors. A magnetic pole diagnostic device for a permanent magnet synchronous motor for an elevator according to claim 3, wherein
The magnetic pole abnormality diagnosis unit is configured to determine the magnetic pole position based on a measured value of the motor current measured according to the magnetic pole position corrected by the other of the addition and subtraction of the predetermined amount and a set value of the motor current. A magnetic pole diagnostic device for a permanent magnet synchronous motor for an elevator, characterized in that when it is diagnosed that there is an abnormality, an alarm is issued and the running speed, acceleration and deceleration are reduced and the operation of the elevator is continued . A magnetic pole diagnostic device for a permanent magnet synchronous motor for an elevator according to any one of claims 1, 3, and 4,
A magnetic pole diagnostic device for an elevator permanent magnet synchronous motor, wherein the elevator operating state is no load in the car. A magnetic pole diagnostic device for an elevator permanent magnet synchronous motor according to any one of claims 1, 3, and 4,
A magnetic pole diagnostic device for a permanent magnet synchronous motor for an elevator , wherein the elevator operation state is a no-load and descent operation in the car . A magnetic pole diagnostic device for an elevator permanent magnet synchronous motor according to any one of claims 1, 3, and 4,
The magnetic pole diagnostic apparatus of a permanent magnet synchronous motor for an elevator , wherein the magnetic pole position adjusting unit corrects the magnetic pole position when the car is unmanned .

Images