KR20120077175A - Bldc motor for nev in 10kw and method and system thereof - Google Patents

Abstract

PURPOSE: A BLDC(Brushless Direct Current) motor, a control system using the same, and a control method thereof are provided to output high capacity power by easily overcoming magnetic force and to reduce the generation of heat by reducing current burden of a coil. CONSTITUTION: A rotor(630) comprises a permanent magnet of A-pole formed into an orthogonal rhomb structure. The permanent magnet of the rotator is a neodymium magnet. An encoder senses the location of the rotor. A sensor outputs the location of the rotator with a sensor signal. A stator(610) is composed of polar teeth(650) of K and successive arrangement of a slot. A wire of n-phase is independently and parally wired on the stator. A power supply unit changes AC power into DC power and applies the DC power to a switching element unit.

Description

BLDC motor for NEV in 10KW and Method and system

The present invention relates to a 10KW class BLDC motor for NEV, a control system and a control method using the same. More specifically, an AC power source is used, and a high voltage and high current flows through a motor, and a winding of a stator suitable for this uses a multiphase independent parallel distribution range. 10KW BLDC motor for NEV and its use to increase the motor's maneuverability by overcoming the magnetic force easily even by using a magnet with strong magnetic force by not limiting the electric phase for controlling the motor. It relates to a control system and a control method.

In general, BLDC (Brushless DC motor) motors are made of permanent magnets with rotors and armatures wound around the core, and have a trapezoidal counter electromotive force waveform. It is light in weight, small in volume, high in efficiency, and is widely used in high performance driving as a variable speed motor.

However, the conventional BLDC motor requires the generation of high current torque for high speed driving, so more current needs to be input than when driving at low speed, and the BLDC motor having a series connection structure is composed of individual coils. Because of the structure connected in series, the resistance value is high and the amount of current that can be input to the motor is also limited to a small value, making it difficult to generate high torque, and high speed and high torque operation are impossible, resulting in a large output. have.

In addition, the use of an AC power source for a BLDC motor using a DC power source and the winding of the stator has a centralized area, which causes a problem that the output is limited compared to using a DC power source. In order to eliminate the counter electromotive force, a complicated drive configuration is required, and the cost thereof is increased.

Accordingly, the present invention is to solve the problems of the prior art, by using an AC power source, by flowing a high voltage and a large current through the motor to the winding of the stator using a multi-phase independent parallel distribution range, the motor size is small but large output The purpose is to make this come out.

In addition, the present invention can be distributed power control in a multi-phase independent structure without limiting the electrical phase for controlling the motor, it is possible to easily overcome the magnetic force even by using a magnet with a high magnetic force to enable a large output of the motor, the driving force Another purpose is to reduce the current load on the coil and reduce the generation of heat.

In addition, the present invention is another structure in which the coils of the respective phases are insulated from each other and do not affect other phases, so that even if only one phase can be driven, the system composed of the motor does not stop.

In addition, the present invention suppresses the generation of surge and back electromotive force generated in the motor by eliminating the residual power in the coil by giving the upper and lower drive signals of the switching element differently, and reducing the capacity of the switching element by distributed power control to reduce the cost There is another purpose.

An object of the present invention is a 10KW BLDC motor for an NEV including a housing, a shaft, and a permanent magnet, the rotor of which the permanent magnet of the A pole has a rectangular orthogonal structure; A stator consisting of a continuous arrangement of K extremes and slots, the n-phase windings each being independent and connected in parallel; An encoder attached to the rotor and configured to sense a position of the rotor; And a sensor for outputting the position of the rotor sensed by the encoder as a sensor signal.

Another object of the present invention is a 10KW BLDC motor for NEV consisting of a stator that is a continuous arrangement of the rotor and K poles and slots of the permanent magnet of the pole A orthogonal rectangle; An encoder for sensing the position of the rotor of the motor; A sensor unit for outputting a position of the rotor sensed by the encoder as a sensor signal; A power supply unit for converting AC power into DC power and applying the same to the main unit and the switching element unit; An input unit for generating a speed command value signal for driving the 10KW-class BLDC motor for the NEV; A main unit for outputting a driving signal for driving the 10KW class BLDC motor for the NEV by using the speed command value signal and the sensor signal; And it is achieved by a control system using a 10KW class BLDC motor for NEV including a switching element for generating a drive signal for driving the 10KW class BLDC motor for NEV.

Still another object of the present invention is a first step of applying power to the main unit and the switching element by converting an AC power source into a DC power source; A second step of applying a speed command value signal and an inverse signal to a processor unit of the main unit; A third step of converting, by the processor unit, a speed command value signal into a digital signal, synchronizing the converted digital signal with a sensor signal of a sensor unit, and calculating and outputting the synchronized signal to a drive unit; A fourth step of receiving a signal output from the drive unit and outputting a signal for driving a switching device unit; A fifth step of receiving a signal output from the switching element unit and applying a driving signal to a 10KW-class BLDC motor for an NEV to drive a 10KW-class BLDC motor for an NEV; A sixth step of outputting a sensor signal for rotating the NEV 10KW BLDC motor by a drive signal and detecting a rotor position of the 10KW BLDC motor for the NEV; And a seventh step of checking whether the speed command value of the NEV 10KW BLDC motor is 0, and stopping the BLDC motor if it is 0.

Therefore, the 10KW BLDC motor, control system and control method for the NEV of the present invention uses an AC power source, and high voltage and high current flow through the motor. There is an advantage to this.

In addition, distributed power control is possible in a multi-phase independent structure without limiting the electric phase for controlling the motor, so that even when a magnet with strong magnetic force is used, it is possible to easily overcome the magnetic force and increase the power of the motor and increase the maneuverability. In addition, there is a remarkable and advantageous effect of reducing the current load on the coil, thereby reducing the generation of heat.

In addition, since the coils of each phase are insulated independently from each other and do not affect other phases, even if only one phase can be driven, there is another effect that the system composed of the motor does not stop.

In addition, by differently driving the upper and lower driving signals of the switching element to eliminate the residual power in the coil to suppress the surge and back electromotive force generated in the motor, there is another effect in reducing the cost by reducing the capacity of the switching element by distributed power control.

1 is a configuration diagram of a control system using a 10KW BLDC motor for an NEV according to an embodiment of the present invention;
2 is a configuration diagram of a control system power supply unit using a 10KW-class BLDC motor for NEV according to an embodiment of the present invention;
3A is a configuration diagram of a control system processor unit using a 10KW BLDC motor for an NEV according to an embodiment of the present invention;
3b is a view showing a forward and backward signal according to an embodiment of the present invention;
3C is a view showing a speed command value signal according to an embodiment of the present invention;
4 is a configuration diagram of a control system drive unit using a 10KW BLDC motor for an NEV according to an embodiment of the present invention;
5A is a block diagram of a control system switching device unit using a 10KW BLDC motor for an NEV according to an embodiment of the present invention;
5B is a view showing a switching signal of a switching device according to an embodiment of the present invention;
Figure 6a is a block diagram of a 10KW class BLDC motor for NEV according to an embodiment of the present invention,
Figure 6b is a block diagram of the sensor plate and encoder plate of the 10KW class BLDC motor for NEV according to an embodiment of the present invention,
Figure 6c is a configuration diagram of the sensor plate of the 10KW BLDC motor for NEV according to an embodiment of the present invention,
Figure 6d is a view showing the encoder plate of the 10KW class BLDC motor for NEV in accordance with an embodiment of the present invention,
Figure 7a is a view showing the connection diagram of a 10KW class BLDC motor for NEV according to an embodiment of the present invention,
7B is a view showing a time chart of a switching device according to an embodiment of the present invention;
Figure 7c is a view showing a four-phase four-pole of the stator winding of the 10KW class BLDC motor for NEV according to an embodiment of the present invention,
8 is a block diagram of a control system sensor unit using a 10KW BLDC motor for an NEV according to an embodiment of the present invention;
9 is a view showing a 10KW BLDC motor structure for an NEV according to an embodiment of the present invention;
10 is a flowchart illustrating a control method using a 10KW BLDC motor for an NEV according to an embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms or words used in the specification and claims should not be construed as having a conventional or dictionary meaning, and the inventors should properly explain the concept of terms in order to best explain their own invention. Based on the principle that can be defined, it should be interpreted as meaning and concept corresponding to the technical idea of the present invention.

Therefore, the embodiments described in the specification and the drawings shown in the drawings are only the most preferred embodiment of the present invention and do not represent all of the technical idea of the present invention, various modifications that can be replaced at the time of the present application It should be understood that there may be equivalents and variations.

1 is a configuration of a control system using a 10KW BLDC motor for NEV according to an embodiment of the present invention. Referring to FIG. 1, the control system includes a power supply unit 110, an input unit 120, a main unit 130, a switching device unit 140, a BLDC motor 150, an encoder 160, and a sensor unit 170. The main unit 130 includes a processor unit 132 and a drive unit 134.

When AC power is supplied, the power supply unit 110 converts the power into DC power using a converter and a bridge diode to supply power to the main unit 130 and the switching element unit 140, and the input unit 120 inputs a speed command value signal. Receive. The converted DC power is supplied to the processor unit 132 and the drive unit 134 of the main unit 130, respectively, and the processor unit 132 of the main unit 130 receives the speed command value signal input from the input unit 120. In operation, the stationary signal and the sensor signal of the sensor unit 170 are received and the signals A1, A2, A3, and A4 are output to the drive unit 134.

The drive unit 134 receives signals of A1, A2, A3, and A4, and outputs Q1, Q2, Q3, and Q4 for driving the switching device unit 140, and the switching device unit 140 drives the drive unit 134. The BLDC motor 150 rotates when a driving signal for driving the BLDC motor is applied to the BLDC motor 150 using Q1, Q2, Q3, and Q4 output from

The encoder 160 is attached to the shaft of the BLDC motor 150 to detect the position of the rotor of the BLDC motor 150, the sensor unit 170 is the sensor signal A of the rotor position detected by the encoder 160 And A 'to output to the main unit 130.

2 is a configuration diagram of a control system power supply unit using a 10KW BLDC motor for an NEV according to an embodiment of the present invention. Referring to FIG. 2, the power supply unit supplies power to a motor driving power supply for driving a BLDC motor and a logic power supply for driving a logic circuit. The motor driving power for driving the BLDC motor converts AC power to DC power using the AC / DC converter 210 when AC input power is generated, and supplies the converted DC power to the switching device to drive the BLDC motor. It is used as a motor driving power source.

Logic power for driving the logic circuit is converted to 5V, 15V DC power using the bridge diode 220 and the DC / DC converter (230, 240) when the AC input power is generated, 5V is supplied to the processor portion of the main unit , 15V is supplied to the drive section of the main section. The speed of the BLDC motor can be adjusted by adjusting the power of the power supply unit.

3A is a block diagram of a control system processor unit using a 10KW BLDC motor for an NEV according to an embodiment of the present invention. The logic unit receives the logic power 5V from the power supply unit, drives the processor unit, and receives and computes the PWM signal (PW) by receiving the forward / reverse signal (CW / CCW), the speed command value signal (AD0), and the sensor signal (A phase, A 'phase). A1, A2, A3 and A4, which are referred to as " PWM " In addition, linear precision control is possible by synchronizing the sensor signal with the speed command value signal.

3B is a diagram illustrating a forward and backward signal according to an embodiment of the present invention. Referring to FIG. 3B, the normal / reverse signal CW / CCW is input to the CW / CCW terminal of the processor unit to set the rotation direction of the BLDC motor, and is set to the forward direction CW at 5V (High) output, and 0V. (Low) Output includes bidirectional control by setting to CCW.

3C is a diagram illustrating a speed command value signal according to an embodiment of the present invention. Referring to FIG. 3C, the speed command value signal AD0 is a variable signal input circuit for varying the speed of a BLDC motor and is composed of a variable resistor. The 5V power source is changed from 0V to 5V and input to the AD0 terminal of the processor unit. Include.

4 is a block diagram of a control system drive unit using a 10KW BLDC motor for an NEV according to an embodiment of the present invention. Referring to FIG. 4, a drive unit for driving a switching element unit including H bridges receives Q1, Q2, Q3, and Q4 through IC chips 410 and 420 by receiving output signals of A1, A2, A3, and A4 from the processor unit. Output to the switching element section.

5A is a block diagram of a control system switching device unit using a 10KW BLDC motor for an NEV according to an embodiment of the present invention. Referring to FIG. 5A, the switching device unit is a circuit for generating a driving signal for driving the BLDC motor 550. It is composed of an H-bridge circuit, receives the motor drive power from the power supply unit, receives the output signals of Q1, Q2, Q3, Q4 from the drive unit and outputs a drive signal for driving the BLDC motor 550.

When the switches of the switching element SW1 510 and SW4 540 are first turned on, current flows to Q1-> BLDC motor 550-> Q4 so that the BLDC motor is driven in the forward direction, and SW2 520 and When the switch of SW3 530 is first turned ON, current flows to Q2-> BLDC motor 550-> Q3, and the BLDC motor is driven in the reverse direction.

5B is a diagram illustrating a switching signal of a switching device according to an embodiment of the present invention. Referring to FIG. 5B, when the SW1 510 and the SW4 540 are turned on in the switching signal of the switching element unit and then turned off, the SW4 540 switch at the lower end is switched to the SW1 510 at the upper end. By turning ON longer than), surge and counter electromotive force generated due to a collision between the residual power remaining in the motor and the power input again when the BLDC motor 550 is driven can be prevented. In addition, when SW2 520 and SW3 530 are turned on and then turned off, SW3 530 at the lower end is turned on longer than SW2 520 at the upper end so that surge and counter electromotive force may be reduced. It includes suppressing the occurrence.

The switching element shown in FIG. 5A is a one-phase H bridge circuit, and in the case of four phases, the switching element portion includes four H bridges, and includes n-phase (n = 2, 3, 4,...) Includes a transistor composed of TR, GTO, IGBT, or the like.

Figure 6a is a block diagram of a 10KW class BLDC motor for NEV according to an embodiment of the present invention. Referring to FIG. 6, a four-phase four-pole BLDC motor having n phases (n = 2,3,4 ...), in which a phase A coil and A 'coil are connected in parallel. Since the windings of four phases are connected to each other independently and connected to the power source, it does not affect the other phases, so that the motor can be driven even if only one phase of the coil is connected, so that the motor can be driven in an emergency. The 10KW BLDC motor for NEV includes using a BLDC motor.

The 10KW class BLDC motor for NEV consists of a stator 610 and a rotor 630. The stator 610 has a structure in which coils are wound in a continuous arrangement of an extreme value 650 and a slot 620. High voltage, high current flows to the motor, and the multi-phase independent parallel distribution band is used to produce a large output.

The rotor 630 may be arranged in a rectangular orthogonal rectangular magnet to obtain a high torque by concentrating the magnetic flux, the permanent magnet 640 of the rotor uses a neodymium magnet, but not limited thereto. Include.

The multi-phase independent parallel distribution range has excellent reluctance torque, which increases torque and efficiency, and applies force simultaneously from multiple angles in multiple phases, making it easy to start, easily overcome the magnetic force, and enabling high-speed rotation. Even if it is small, it can produce a large output.

The stator 610 is composed of K extreme values 650, the rotor 630 is composed of permanent magnets of the A pole, the electrical phase is a plurality of phases (n = 2, 3, 4 ...) Including expressions.

6B is a configuration diagram of a sensor plate and an encoder plate of a 10KW BLDC motor for an NEV according to an embodiment of the present invention. Referring to FIG. 6B, the photointerrupter sensor device 660, the sensor plate 670, and the encoder plate 680 are formed, and the sensor plate 670 of FIG. 6C and the encoder plate 680 of FIG. 6D are coupled to each other. The encoder plate 680 is coupled to the sensor plate 670 to determine the photointerrupter sensor element 660 that is excited and the photointerrupter sensor element 660 that is not excited.

Figure 6b shows a four-phase, the rotation sequence of the BLDC motor is A1-B1-C1 → B1-C1-D1 → C1-D1-A2 → D1-A2-B2 → A2-B2-C2 → B2-C2 -D2 → C2-D2-A1 → D2-A1-B1 → A1-B1-C2 → A1-B1-C1 in excitation order, BLDC motor is n-1 phase (n = 2,3,4 ...) It involves being a woman.

Figure 7a is a diagram showing the wiring diagram of a 10KW BLDC motor for NEV according to an embodiment of the present invention. Referring to FIG. 7A, an equivalent circuit of a BLDC motor having a multi-phase independent parallel structure shows a sequence diagram of excitation of distributed power n-1 phases (n = 2,3,4 ...) and excitation based on four phases. The order is switched from ABC-> BCD-> CDA-> DAB-> ABC and includes not limited to 4 phases because the phases are multiphase.

As it is a multi-phase independent parallel distribution range, distributed power control is possible, and current load and heat generation rate of each phase are small, so it is highly reliable in driving the motor and is insulated by each phase, so it does not affect the motor composed of other phases. Even if an abnormality occurs in the coil, if only one phase of the n phases (n = 2, 3, 4 ...) can be driven, the motor does not stop.

7B is a view illustrating a time chart of a switching device according to an embodiment of the present invention. Referring to FIG. 7B, a switching signal for driving a four-phase four-pole BLDC motor having n phases (n = 2,3,4 ...), wherein the switching signal is n-1 phases (n = 2,3). , 4 ...), eliminating the residual power of the motor through the phases of rest and rest.

For example, the switching signal between 22.5 degrees and 45 degrees is A phase, B phase, D phase is ON and C phase is OFF, so 3 phase is ON and 1 phase is OFF. Therefore, precise torque control is possible because power is constantly supplied in any section to maintain constant torque. In addition, in the case of phase A, a period of rest between 67.5 degrees and 90 degrees can eliminate the residual power of the BLDC motor in this interval.

Figure 7c is a view showing the four-phase four-pole of the stator winding of the 10KW class BLDC motor for NEV in accordance with an embodiment of the present invention. Referring to FIG. 7C, a BLDC motor shows a multiphase independent parallel distribution range consisting of four phases, four poles and 16 slots. In the case of phase A, four motor coils are connected in parallel, and phases A, B, C, and D are independently connected. As each winding is independent connection, independent control is possible because it does not interfere with each other.

8 is a configuration diagram of a control system sensor unit using a 10KW BLDC motor for an NEV according to an embodiment of the present invention. Referring to FIG. 8, a sensor unit is needed to give the speed command of the BLDC motor because it is a 10KW class BLDC motor for an NEV.

The BLDC motor is driven by the sensor signal and the speed command value signal of the sensor unit, and the encoder plate rotates as the motor rotates to output the A phase and the A 'phase while passing through the photointerrupter sensor elements 810 and 820. When the encoder plate passes through the photointerrupter sensor elements 810 and 820, it outputs 0V (Low signal) and 5V (high signal) when it does not pass through the photointerrupter sensor elements 810 and 820, and the output signal is inputted to the processor unit and calculated. The sensor signal may be synchronized with the speed command value signal to enable excellent response characteristics and linear precision control through precise variable control.

The sensor unit may include a signal for making the switch at the lower end longer than the switch at the upper end in the switching signal of FIG. 5B.

9 is a view showing a 10KW BLDC motor structure for an NEV according to an embodiment of the present invention. 9, the first housing 910, the shaft 920, the permanent magnet 930, the rotor 940, the stator 950, the second housing 960, the sensor plate 970, and the encoder plate. 980.

The rotor 940 is composed of a permanent magnet 930 and a shaft 920, the shaft 920 is a shaft of a BLDC motor, and the permanent magnet 930 includes arranging neodynium magnets in a rectangular shape.

A coil is connected to the stator 950, and the first housing 950 and the second housing 960 serve to fix the motor, and the sensor plate 970 and the encoder plate 980 attached to the stator 950. It consists of a).

10 is a flowchart illustrating a control method using a 10KW BLDC motor for an NEV according to an embodiment of the present invention. Referring to FIG. 10, the motor driving power is applied to the switching element unit and the logic power is applied to the main unit in the power supply unit (S10). The processor unit inputs the speed command value signal and the stationary signal input from the input unit (S20), and the processor unit converts the input speed command value signal into a digital signal (S30) to receive the converted digital signal and the sensor signal of the sensor unit to perform synchronization. (S40).

The synchronized signal is calculated by the processor unit and output to the drive unit (S50), and the output signal is driven by the drive unit to output a signal for driving the switching element unit (S60). When the switching element unit receives the output signal and applies a driving signal for driving the BLDC motor (S70), the BLDC motor is rotated (S80), and the sensor unit attached to the motor while the BLDC motor is rotating rotates the position of the rotor of the motor. Outputs the sensor signal to detect (S90).

When the speed command value of the BLDC motor becomes 0 (S100), the BLDC motor stops (S110), and if the speed command value is not 0, the motor rotation continues according to the step.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of limitation, Various changes and modifications will be possible.

110: power supply unit 120: input unit
130: main portion 140: switching element portion
150: BLDC motor 160: encoder
170: sensor unit 610: stator
620: slot 630: rotor
640: permanent magnet 650: extreme
660: photointerrupter sensor element 670: sensor plate
680: encoder version

Claims (12)

10KW class BLDC motor for NEV including housing, shaft and permanent magnet,
A rotor composed of a permanent magnet of A pole in a rectangular orthogonal structure;
A stator consisting of a continuous arrangement of K extremes and slots, the n-phase windings each being independent and connected in parallel;
An encoder attached to the rotor and configured to sense a position of the rotor; And
Sensor for outputting the position of the rotor detected by the encoder as a sensor signal
10KW class BLDC motor for NEV, including.
The method of claim 1,
The winding of the stator is a 10KW class BLDC motor for NEV distribution type.
The method of claim 1,
The permanent magnet of the rotor is an electronic motor using a neodymium magnet.
In the control system using a 10KW BLDC motor for NEV,
10KW BLDC motor for NEV, consisting of rotor with orthogonal rhombus of pole A and stator of continuous arrangement of K poles and slots;
An encoder for sensing the position of the rotor of the motor;
A sensor unit for outputting a position of the rotor sensed by the encoder as a sensor signal;
A power supply unit for converting AC power into DC power and applying the same to the main unit and the switching element unit;
An input unit for generating a speed command value signal for driving the 10KW-class BLDC motor for the NEV;
A main unit for outputting a driving signal for driving the 10KW class BLDC motor for the NEV by using the speed command value signal and the sensor signal; And
Switching element unit for generating a drive signal for driving the 10KW BLDC motor for NEV
Control system using 10KW class BLDC motor for NEV, including.
The method of claim 4, wherein the main unit,
A processor unit for synchronizing the speed command value signal with the sensor signal, and calculating and outputting the synchronized signal to a drive unit; And
A drive unit for receiving a signal output from the processor unit and outputting a signal for driving the switching element unit
Control system using 10KW class BLDC motor for NEV, including.
The method of claim 4, wherein
The 10KW BLDC motor for NEV is a control system using a 10KW BLDC motor for NEV which is a BLDC motor.
The method according to claim 6,
The BLDC motor is a control system using a 10KW class BLDC motor for NEV including a stator, the n-phase windings are independent of each other, and connected in parallel.
The method of claim 4, wherein
The winding of the stator is a control system using a 10KW class BLDC motor for NEV in the form of distribution.
The method of claim 4, wherein
The sensor unit is a control system using a 10KW class BLDC motor for NEV, a photointerrupter sensor element.
The method of claim 4, wherein
The switching device unit is composed of an H bridge circuit, the control system using a 10KW class BLDC motor for NEV, n H bridge circuit in the case of n phase.
In the control method using a 10KW BLDC motor for NEV,
A first step of converting AC power into DC power to apply power to the main part and the switching element part;
A second step of applying a speed command value signal and an inverse signal to a processor unit of the main unit;
A third step of converting, by the processor unit, a speed command value signal into a digital signal, synchronizing the converted digital signal with a sensor signal of a sensor unit, and calculating and outputting the synchronized signal to a drive unit;
A fourth step of receiving a signal output from the drive unit and outputting a signal for driving a switching device unit;
A fifth step of receiving a signal output from the switching element unit and applying a driving signal to a 10KW-class BLDC motor for an NEV to drive a 10KW-class BLDC motor for an NEV;
A sixth step of outputting a sensor signal for rotating the NEV 10KW BLDC motor by a drive signal and detecting a rotor position of the 10KW BLDC motor for the NEV; And
Step 7 to check whether the speed command value of the 10KW BLDC motor for NEV is 0, and stops the BLDC motor if 0
Control method using a 10KW class BLDC motor for NEV comprising a.
12. The method of claim 11,
If the speed command value is not 0 in the seventh step, the control method using a 10KW class BLDC motor for NEV to return to the third step.

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