Method and system for reducing noise and positioning pistons during bad starts in electric motors

Abstract

The present invention relates to a method and system for reducing noise and positioning a piston during a start failure of an engine (20), which is configured to significantly reduce noise generated during a start failure of the engine (20) and to position the piston (15) in a position advantageous for a new start.

Description

[Technical Field]

[0001] The present invention provides electric motor This significantly reduces the noise generated when the engine fails to start, and also allows the piston to be positioned in a way that is advantageous for a new start. electric motor This invention relates to a method and system for reducing noise during engine starting failure and positioning the piston. [Background technology]

[0002] Widely used in several fields, mainly in industry electric motor It is known that some vehicles suffer from poor starting, which can be caused by several factors. Furthermore, such a failure can cause an undesirable noise due to the impact of the compressor kit on the housing. This problem is called knocking noise (KN).

[0003] More specifically, when the piston begins to compress the gas due to inertia, depending on the state of the cooling system, electric motor does not have enough force to overcome the gas pressure and is unable to complete the cycle (suction-compression).

[0004] The rotor starts rotating from the initial position and moves forward to the next position. In the compression cycle, the gas contained in the chamber is compressed. electric motor The malfunction occurs when there is not enough force to compress the gas and move the shaft to its next position.

[0005] If it is detected that the rotor has not reached the next expected position (target position), electric motor The electronic switch that supplies power to the compressor is quickly turned off. This removes the force forcing the piston to move, and the compressed gas in the chamber pushes the piston back, creating an impact on the compressor kit (which is supported by a spring) and causing it to electric motor It hits the housing and causes the above-mentioned noise (knocking noise).

[0006] Several technologies have been developed to solve this noise problem. For example, US Patent Application Publication US2014 / 0212266A1 states: electric motor A technique based on speed control is described, by maintaining the same set of previously actuated switches. electric motor It is configured only to perform simple maintenance of the current position of the

[0007] US Patent Application Publication US2018 / 0195509A1 and US Patent Application Publication US2007 / 0098566A1 disclose a compressor that detects and optimizes piston position to facilitate starting after a potential failure. electric motor There is no disclosure of gradually reducing the voltage applied to the

[0008] Therefore, in the current state of the art, in the event of a possible malfunction of the compressor, electric motor No solution exists that is configured to gradually decrease the voltage applied to the piston and then obtain piston position data to optimize that position for subsequent starts. Summary of the Invention [Problem to be solved by the invention]

[0009] The object of the present invention is to electric motor A method and system configured to reduce noise during a bad start is provided.

[0010] The object of the present invention is to electric motor A method and system configured to allow for new piston positioning in the event of a false start is provided.

[0011] The object of the present invention is to electric motor A method and system configured to ramp down the voltage of a controlled switch is provided.

[0012] The objective of this invention is to reduce noise during starting problems and achieve piston positioning. electric motor The purpose is to provide [Means for solving the problem]

[0013] The object of the present invention is to provide a piston positioning system having a fault detection logic, a de-energization logic, and a piston positioning logic. electric motor In a method for noise reduction and piston positioning during starting failure, electric motor The object of the present invention is to achieve the above by operating a set of keys (switches). electric motor Noise reduction system and piston positioning during start-up failure, and adapted for the method electric motor is achieved by itself. [Brief explanation of the drawings]

[0014] The present invention will be described in more detail below based on the embodiments shown in the drawings.

[0015] [Figure 1] FIG. 1 is a graph illustrating the failure to start an electric motor and its immediate de-energization according to the state of the art (prior art).

[0016] [Figure 2] FIG. 2 is a graph illustrating an electric motor start failure and its gradual de-energization in accordance with the present invention.

[0017] [Figure 3a] FIG. 3a shows an example of piston positioning during the compression phase.

[0018] [Figure 3b] FIG. 3b shows an example of piston positioning during the suction phase.

[0019] [Figure 4] 4a, 4b and 4c show examples of magnetic field alignment by piston positioning.

[0020] [Figure 5]Figure 5 shows an example of a fault in electric motor starting, illustrating the behavior of the piston in this scenario and showing its position.

[0021] [Figure 6] FIG. 6 is a flow chart illustrating one configuration of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0022] Generally, the present invention provides a method for manufacturing a semiconductor device comprising: electric motor The present invention relates to a method for noise reduction and positioning of a piston 15 in a cylinder 25 during a start-up failure of an engine 20. electric motor 20, for example, includes a rotor with 12 alignment positions, but this feature is not intended to limit the invention and the invention may be adapted for other electric motor It should be understood that the above can be implemented using

[0023] In any case, it is used electric motor 20 is electrically or mechanically connected to at least the piston 15, so that the piston 15 electric motor 20 operations and, as a result, must be understood as being operable by a set of keys (switches). good In a preferred configuration, the key may be an IGBT or MOSFET, or alternatively, any other key compatible with the present invention and its purposes.

[0024] Furthermore, FIGS. 3a and 3b disclose examples of piston positioning in the compression and suction phases, respectively, and also illustrate the magnetic field 30.

[0025] 4a, 4b and 4c show the possible movements of the piston 15 according to the positioning of the piston 15 in different phases. electric motor 1 shows possible alignments of the magnetic field 30.

[0026] The present invention is generally composed of a piston 15 failure (malfunction) detection logic 100, a de-energization (power supply cut-off) logic 200, and a positioning logic 300, as particularly shown in FIG.

[0027] In one implementation, the fault detection logic 100 detects at least one current position S0 of the piston 15, one most The method includes obtaining a preferred position S1, and one next position S2. Briefly, the current position S0 is determined by a set of key combinations (how multiple keys are combined). These switch combinations position the piston 15 at a predetermined (given) current position S0. Knowing the current position S0, it is possible to determine the most preferred position S1 and the next position S2 of the piston 15.

[0028] With respect to these positions, the following is observed:

[0029] Current position SO: Set (defined) as the initial position. That is, the current position SO is the position where the piston 15 is in the initial state (where it is "now").

[0030] Most preferred position S1: Set as the most preferred position that the piston should reach immediately after the current position S0. That is, the most preferred position S1 is the most preferred position that the piston 15 should head to when moving from the current position S0. In other words, it is the most preferred position that the piston 15 is assumed (estimated) to head to when moving from the current position S0. It may or may not be the same as the next position S2.

[0031] Next position S2: The position that the piston actually reaches immediately after the current position S0 is set. That is, the next position S2 is the position that the piston 15 actually heads to after leaving the current position S0. It may or may not be equal to the most desirable position S1.

[0032] Once these positions are obtained, the fault detection logic 100 performs the step of comparing the next position S2 with the most preferred position S1, which may or may not be the same (coincident).

[0033] If the next position S2 is equal to the most preferred position S1, electric motor It is understood that there was no failure to start 20, and in that case, electric motor 20 starts working normally.

[0034] If the next position S2 is not equal to the most preferred position S1, electric motor It is understood that 20 failed to start.

[0035] The types of faults described above are primarily illustrated in Figure 5, which is read from left to right. electric motor It can be seen that 20 starts its movement by leaving position 8, starts rotating to position 9, and then rotates and moves in succession, i.e. clockwise direction (it should be noted that the direction of rotation should not be understood as a limitation of the present invention). With each change of position (between positions 7 and 12), the gas contained in the chamber is compressed.

[0036] In this example, when the shaft reaches position 12, electric motor It is observed that the gas did not have enough force to compress the gas and move the piston shaft 15 to position 1. That is, in this example, the current position S0 is position 12, the most preferred position S1 is position 1, and the next position S2 is position 11. Note that the present invention may be configured to use time logic to wait for position S1 until a timeout (time limit) has elapsed, at which point a position failure may be identified (detected).

[0037] That is, FIG. 5 shows that when piston 15 was at position 12 (current position S0=12), the piston was expected to go to position 1 (most preferred position S1=1), but piston 15 did not reach position 1. In this case, the example in FIG. 5 shows that piston 15 reached position 11, i.e., did not actually reach position 1. However, it should be noted that it is only necessary to know whether piston 15 reached most preferred position S1. If piston 15 did not reach the most preferred position, it is possible that piston 15 remained at position 12, for example.

[0038] When this state is detected, that is, when it is detected that the next expected position has not been reached (position S2 different from position S1), a fault is detected.

[0039] Thus, the fault detection logic 100 is configured to detect a fault if at least the next position S2 differs from the most preferred position S1.

[0040] In this case, when a fault is detected, the conventional technology quickly turns off all switches, as shown in the graph in Figure 1. electric motor In the prior art configuration, the compressed gas in the cylinder pushes the piston 15 in the opposite direction, generating unnecessary noise. electric motor This would cause the kit 20 to move and potentially collide with the compressor (piston compressor) wall, and would also result in a complete loss of piston position reference.

[0041] On the other hand, in the present invention, as shown in FIG. 2, if a fault is detected at startup, electric motorThe magnetic field of 20 is gradually reduced (controlled) to avoid (prevent) the generation of noise. In this case, the compressed gas in the cylinder gradually pushes the piston 15 to a rest position (such as bottom dead center), so this position is known (the position of the piston is known). In this way, if the magnetic field is kept activated (active), the piston 15 will stay at a certain position and the gas will begin to escape from the wall of the cylinder, during which time, electric motor The magnetic field of 20 is gradually reduced. As the magnetic field is reduced, the gas still contained within the cylinder pushes the piston 15 back to its other position, but more slowly. This means that all the energy contained in the compression of the gas is gradually dissipated, reducing the displacement in the opposite direction to the kit's displacement and reducing the chance of the kit hitting the compressor wall.

[0042] In accordance with the teachings of the present invention, when a fault is detected, the de-energization logic 200 of the present invention is initiated, as particularly shown in Figure 2. This logic comprises at least one step of actively maintaining a magnetic field (field).

[0043] With reference to FIG. 2, the present invention is configured such that when the controller detects a failed start, it keeps the magnetic field active (does not extinguish) for a predetermined period of time, rather than turning off the switch to extinguish the magnetic field.

[0044] In other words, at least two keys in a set of powered keys are kept on (kept on). salary The steps of the power-down logic 200 are at least temporarily executed to at least temporarily maintain the piston 15 in each next position S2, so that the gas still contained inside the cylinder can slowly push the piston 15 back to another position, thereby dissipating the energy that would force the piston and preventing it from crashing into the compressor. Thus, in accordance with the teachings of the present invention, this movement advantageously occurs more slowly, rather than suddenly, as would occur if the magnetic field were immediately eliminated.

[0045] Alternatively, the fault detection logic 100 may be configured to operate, for example, based on a time measurement (elapsed time), i.e., starting from a starting position (e.g., current position S0): electric motor It may also be possible to limit (limit) the maximum time for the piston 15 at 20 to reach the next position (eg, the most preferred position S1).

[0046] If the elapsed time is longer than the set time (time limit), a malfunction occurs. electric motor It seems that 20 has not reached the expected position. In this case, electric motor To detect that a positioning error of 20 has occurred, it is not necessary to know the next position (e.g., the next position S2). electric motor It is sufficient to know that 20 pistons 15 have not reached the next position (eg, the most preferred position S1) within a limited time.

[0047] Otherwise, if the piston reaches the next position (e.g., the most favorable position S1) within a limited time, electric motor 20 is working properly.

[0048] Typically, the position is detected by a sensor configured to determine the position of the piston 15 .

[0049] Next, continuing with the above description, piston positioning logic 300 includes tapering off (gradually decreasing) the magnetic field applied to the electric motor.

[0050] Advantageously, this prevents the compressed gas in the chamber from pushing the piston 15 back. electric motor When the magnetic field in 20 is reduced, the gas pushes on the piston 15, but this happens more smoothly, thus avoiding excessive vibration of the kit. electric motor It is also possible to avoid the kit hitting the frame 20, and in addition, it is possible to avoid fatigue of some components such as springs.

[0051] Furthermore, this logic (piston positioning logic ) comprises the step of positioning the piston at a new current position S0: since it is known from the moment the piston 15 stopped (for example between positions 6 or 7) where the fault occurred (for example position 12), it is possible from this information to position the shaft of the electric motor 20 in the most favorable position for a new start (for example position 1).

[0052] With the shaft positioned at position 1, electric motor 20 can go through a complete suction cycle to get up to speed, storing power to overcome gas pressure and advantageously increasing the chances of a successful start.

[0053] In this scenario, the method of the present embodiment starts from the new current position S0 electric motor The method may also include starting the

[0054] That is, after fault detection electric motor After gradually decreasing the magnetic field applied to electric motor takes a new initial position S0, and at that position the fault detection logic, de-energization logic, and piston positioning logic are adjusted until the next position S2 is the same as the most desirable position S1, i.e. electric motor This is continued until the system is able to function normally.

[0055] The present invention further comprises: electric motor A system for noise reduction and piston positioning during a bad start is provided, which system conforms to the method described above and includes at least a power unit (power supply module), a fault detection module, and an actuation module (drive module).

[0056] Regarding the components of this system, the power module (power supply module) has at least one set of keys. of Contains these keys teeth , electric motor 20.

[0057] In one embodiment of the present invention, the power module is to Selectively energize electric motor It is configured to allow 20 starts.

[0058] The fault detection module has at least one data processing element, such as a sensor or sensors (a set of sensors) configured to measure and process data and transmit information to the operation module.

[0059] In one embodiment of the present invention, the fault detection module detects at least one current position S0 of the piston, one most The module is configured to obtain a preferred location S1 and one next location S2, which have been described in detail above. The module is further configured to compare the next location S2 with the most preferred location S1, thus detecting a fault when at least the next location S2 differs from the most preferred location S1, as previously described.

[0060] The operating module, on the other hand, has at least one configured control element, in particular a microcontroller type control device or a PC, which is configured to receive data from the fault detection module and is therefore able to communicate electrically with the fault detection module.

[0061] Thus, the activation module is of switch fart The power module is configured to gradually decrease the voltage of a set of keys. ( It serves to selectively energize multiple keys. electric motor This allows 20 to start.

[0062] Therefore, a set of keys in which a fault is detected and the operating module is energized of The power module powers a set of energized keys, allowing for a gradual reduction in voltage to a given key. of The voltage to a given key is gradually decreased (decreased gradually) to position the piston 15 at a new current position S0.

[0063] Furthermore, in relation to the power supply module (power supply module), as already mentioned, if the next position S2 detected by the fault detection module differs from the most preferred position S1, a set of keys of It is configured to keep at least two of the keys powered.

[0064] More specifically, the power supply module includes a set of keys. of At least two of the keys are kept in an energized state at least temporarily, and the piston 15 is kept at the next position S2 at least temporarily, so that the piston 15 can be prevented from colliding with the compressor.

[0065] In one implementation, the actuation module also calculates the new current position S0 as described above. electric motor is configured to start the

[0066] The configuration of the multiple modules that make up the system of the present invention is consistent with the method described above, and therefore, when necessary changes and modifications are made, the characteristics of the method and the system are commonly changed and modified.

[0067] Furthermore, the present invention provides noise reduction and piston positioning in response to starting problems (poor starting) using the above-described method and system. electric motor 20, which are also objects of the present invention.

[0068] Finally, the present invention provides noise reduction during start-up failures and piston 15 positioning means. electric motor 20, and also includes a cooling device having at least one such compressor.

[0069] Although examples of preferred embodiments have been described, the scope of the present invention includes other possible variations and is limited only by the claims, including equivalents to the claims.

Claims

1. A method for reducing noise and positioning a piston (15) during a start-up failure of an electric motor (20) attached to a piston compressor, the method comprising: fault detection logic (100); de-energization logic (200); and positioning logic (300) for the piston (15), the electric motor (20) being drivable by a set of keys; The fault detection logic (100) includes at least: Obtaining the current position (S0) of the piston (15), the position (S1) that it should reach if there is no starting failure, and the next position (S2); comparing said next position (S2) with said position to be reached (S1); the de-energizing logic (200) includes at least the step of maintaining a magnetic field active, and while the magnetic field is maintained active, the piston (15) is maintained in the next position (S2); The piston (15) positioning logic (300) comprises: gradually reducing the voltage of a key in the set of energized keys after a fault is detected; and after said lowering step, positioning said piston (15) in a position suitable for piston restart. A method characterized by:

2. 2. The method for reducing noise and positioning a piston (15) during a start-up failure of an electric motor (20) according to claim 1, wherein the fault detection logic (100) is configured to detect the fault at least if the next position (S2) differs from the position to be reached (S1).

3. 3. A method for reducing noise and positioning a piston (15) during a starting failure of an electric motor (20) according to claim 2, characterized in that the current position (S0) is an initial position, the position to be reached (S1) is a position (S1) that the piston (15) should reach next to the current position (S0), and the next position (S2) is a position that the piston (15) actually reaches next to the current position (S0).

4. 4. The method for reducing noise and positioning a piston (15) during a start-up failure of an electric motor (20) according to claim 3, characterized in that a step of keeping the magnetic field of the de-energizing logic (200) active is performed if the next position (S2) is different from the position to be reached (S1).

5. 5. The method for reducing noise and positioning a piston (15) during a start-up failure of an electric motor (20) as recited in claim 4, wherein the step of keeping the magnetic field of the de-energizing logic (200) active is performed at least temporarily.

6. The method further comprises starting the electric motor (20) from a position suitable for restarting the piston (15); 6. The method for reducing noise and positioning a piston (15) during a starting failure of an electric motor (20) according to claim 5, wherein the fault detection logic (100), the de-energization logic (200), and the piston (15) positioning logic (300) are executed until the next position (S2) and the position to be reached (S1) are equal.

7. 7. The method for reducing noise and positioning a piston (15) during a start-up failure of an electric motor (20) according to claim 6, further comprising the step of determining the current position (S0) of the piston (15) by the combination of the set of keys.

8. the method is configured to be performed based on a time measurement; The method comprises: defining a maximum time required for the piston (15) of the electric motor (20) to reach the target position (S1) from the current position (S0) as a time limit; a step of checking whether the piston (15) of the electric motor (20) has reached the position (S1) to be reached within the time limit; selectively detecting a fault if the piston (15) of the electric motor (20) does not reach the position (S1) to be reached within the time limit; 8. The method for reducing noise and positioning a piston (15) during a bad start of an electric motor (20) according to claim 7, comprising:

9. 4. The method for reducing noise and positioning a piston (15) during a start-up failure of an electric motor (20) according to claim 3, wherein the keys in the set of keys are at least one of an IGBT and a MOSFET.

10. A system for noise reduction and piston (15) positioning during start-up failure of an electric motor (20) attached to a piston compressor, comprising at least one power module, one fault detection module, and one operating module, wherein the power module comprises at least one set of keys, the fault detection module comprises at least one data processing element, and the operating module comprises at least one control element; The power module selectively energizes the set of keys to start the electric motor (20), thereby generating a magnetic field that is applied to the electric motor (20); the fault detection module is configured to obtain a current position (S0) of the piston, a position (S1) that should be reached if there is no starting fault, and a next position (S2) of the piston, and to compare the next position (S2) with the position (S1) that should be reached; The system for reducing noise and positioning a piston (15) during a start-up failure of an electric motor (20) is characterized in that the actuation module is configured to gradually reduce the voltage of a key in the set of energized keys to position the piston (15) in a position suitable for restarting the piston.

11. 11. The system for noise reduction and piston positioning during starting problems of an electric motor (20) according to claim 10, characterized in that the fault detection module is configured to detect a fault at least if the next position (S2) differs from the position to be reached (S1).

12. 11. A system for reducing noise and positioning a piston (15) during a starting failure of an electric motor (20) as described in claim 10, characterized in that the current position (S0) is an initial position, the position to be reached (S1) is a position to be reached by the piston after the current position (S0), and the next position (S2) is a position to which the piston actually reaches after the current position (S0).

13. 11. The system for noise reduction and piston positioning during a start failure of an electric motor (20) according to claim 10, characterized in that the power module is configured to actively maintain the magnetic field if the next position (S2) detected by the fault detection module differs from the position to be reached (S1).

14. 11. The system for noise reduction and piston positioning during a start-up failure of an electric motor (20) according to claim 10, characterized in that the power module is configured to at least temporarily actively maintain the magnetic field to at least temporarily maintain the piston (15) in the next position (S2).

15. 11. The system for reducing noise and positioning a piston during a start failure of an electric motor (20) as set forth in claim 10, wherein the operating module is further configured to start the electric motor (20) from a position suitable for restarting the piston (15).

16. 11. The system for noise reduction and piston positioning during a start-up failure of an electric motor (20) according to claim 10, wherein the current position (S0) of the piston (15) is determined by the set of key combinations.

17. 17. The system for reducing noise and positioning a piston (15) during a start-up failure of an electric motor (20) according to claim 16, wherein the keys in the set of keys are at least one of an IGBT and a MOSFET.

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