JP2017070065A - Rotary electric machine and assembly thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To change a rotary electric machine control method according to an ambient temperature, with the reduction of a component configuration to acquire an outside air temperature.SOLUTION: A rotary electric machine assembly includes a rotary electric machine which includes: a housing; a stator which attached to the housing; a rotor fixed to a revolving shaft; a bearing for supporting the revolving shaft and an end bracket to which the bearing is attached. The rotary electric machine assembly further includes: a power conversion device, which supplies a drive current to the stator of the rotary electric machine; and a control board, which controls the rotary electric machine through the power conversion device; which are arranged on an outer periphery part of the housing. In the power conversion device, a temperature detector is provided in a region in which the power conversion device contacts to the housing. The control board is configured to change the control method of the rotary electric machine according to the temperature detected by the temperature detector.SELECTED DRAWING: Figure 10

Description

  The present invention relates to a rotating electrical machine and a rotating electrical machine assembly used for driving various devices including a pump, and more particularly to a method for controlling the rotating electrical machine.

  For example, a pump installed alone outdoors is likely to be affected by the air temperature (ambient temperature), and further installed alone and has no shielding, so that it is required that the operation sound be quiet. In particular, depending on the location where the temperature rises and the rotating electrical machine is warmed by direct sunlight, it is necessary to suppress the temperature rise of the rotating electrical machine, and conversely, the operating sound of the rotating electrical machine is reduced at night when the surrounding background noise is reduced. It is necessary to suppress.

  As a background art of this technical field, there is JP-A-2014-2076 (Patent Document 1). Patent Document 1 discloses a method of providing a clock (timer unit) in a heat pump water heater and controlling the heat pump unit in time. Japanese Patent Laying-Open No. 2012-10490 (Patent Document 2) discloses a method for calculating and estimating an increase in temperature of an inverter component using only internal information of an arithmetic processing unit.

  Further, it is generally known that the amount of heat generated in the power converter that controls the rotating electrical machine can be reduced by lowering the carrier frequency (frequency of the pulse width modulation period of the output power output from the power converter described later). Yes.

JP 2014-20964 A JP 2012-10490 A

  However, in Patent Document 1, a timepiece (timer unit) must be used, and the timepiece must always be energized or provided with a battery or a battery. Even when the battery is provided, the time information may be lost if a power failure occurs when the battery reaches the end of its life. Therefore, it is conceivable to change the control method of the rotating electric machine by judging day and night without using a clock. Judgment using the outside air temperature is possible as one of day and night judgments.

  On the other hand, in Patent Document 2, the temperature rise of the inverter component can be estimated. However, in order to grasp the outside air temperature, it is necessary to provide a dedicated temperature sensor outside.

  The present invention has been achieved in view of the above-described problems in the prior art, and an object of the present invention is to change the control method of the rotating electrical machine according to the ambient temperature while reducing the component configuration for acquiring the outside air temperature. And

  In order to achieve the above object, the present invention, as an example, includes a housing, a stator attached to the housing, a rotor fixed to the rotating shaft, a bearing that supports the rotating shaft, and a bearing. A rotating electrical machine having an end bracket to which the motor is mounted, a power conversion device that supplies a drive current to the stator of the rotating electrical machine, and a control board that controls the rotating electrical machine via the power conversion device are disposed on the outer periphery of the housing The rotating electrical machine assembly includes a temperature detector in a region where the power converter and the housing are in contact with each other in the power converter, and the control board controls the rotating electrical machine according to the temperature detected by the temperature detector. Configure to change.

  According to the present invention, it is possible to reduce the component configuration for acquiring temperature information, to grasp the ambient temperature based on the temperature of the rotating electrical machine, and to control the rotating electrical machine according to the ambient temperature. It becomes.

It is an external appearance perspective view which shows the whole structure of the rotary electric machine assembly for the outdoor installation pump drive in Example 1. FIG. FIG. 3 is an exploded perspective view showing an overall structure of a rotating electrical machine portion built in a cover of the rotating electrical machine assembly according to the first embodiment. FIG. 3 is an exploded perspective view showing each part when the rotating electrical machine assembly in Example 1 is housed in a cover. In the rotating electrical machine assembly in Example 1, it is a partially cutaway perspective view for explaining another example of the positional relationship between the power converter attached to the housing and the stator. It is a circuit block diagram of the power converter device in Example 1. FIG. It is a figure which shows the content of the volatile memory among the data contents memorize | stored in the control board (control circuit) in Example 1-4. It is a figure which shows the content of the non-volatile memory among the data content memorize | stored in the control board (control circuit) in the present Examples 1-4. It is a figure which shows the main control processing flow which made the example the pump in Examples 1-4. It is a figure which shows the temperature measurement process flow in Example 1. FIG. It is a figure which shows the driving | running state measurement process flow in Example 1. FIG. It is a figure which shows the temperature determination processing flow in Example 1. FIG. 6 is an explanatory diagram regarding a temperature gradient in Embodiment 1. FIG. It is a figure which shows the relationship between the distance in Example 1, and a temperature fall amount. It is a figure which shows the time setting process flow in Example 1. FIG. It is a figure which shows the motor control setting process flow in Example 1. FIG. It is a figure which shows the motor control setting process flow in Example 2. FIG. It is a figure which shows the motor control setting process flow in Example 4. FIG.

  Embodiments of the present invention will be described below with reference to the drawings.

  In the present embodiment, a rotating electrical machine assembly in which a power converter, various circuit boards, a capacitor, a noise filter, and the like are integrated with the rotating electrical machine will be described as an example. These rotating electrical machine assemblies are used, for example, for driving an outdoor installation pump. And the control method change of the temperature rise suppression driving | running | working of a rotary electric machine according to ambient temperature and the silent operation which suppresses a driving | running sound low is demonstrated.

  FIG. 1 is an external perspective view showing the entire configuration of a rotary electric machine assembly for driving an outdoor installation pump in this embodiment. In FIG. 1, reference numeral 10 denotes a cover that covers the outer periphery of the rotating electrical machine main body, and has a substantially cylindrical outer shape. The cover 10 is formed into a predetermined shape by, for example, pressing a plate-like resonance suppressing material. More specifically, noise and vibration can be suppressed by attaching a sound absorbing material, a soundproofing material, a vibration damping material, a vibration damping material, or the like inside the cover.

  A cooling fan cover 20 containing a centrifugal fan 58, which will be described later, is attached to one end portion (back side in the figure) of the cover 10 in the axial direction. Further, an end bracket 11 of a rotating electrical machine described below is attached to the other end (the front side in the figure, the load side). Further, a power converter case 30 containing a power converter, which will be described later, and a terminal box 40 incorporating a noise filter are attached to the outer peripheral surface of the cover 10.

  FIG. 2 is an exploded perspective view showing a configuration of the rotating electrical machine 50 built in the cover 10 in the present embodiment. FIG. 2 shows an example of a permanent magnet type rotating electrical machine. In FIG. 2, reference numeral 51 denotes a substantially cylindrical housing (also referred to as a frame). The housing 51 is formed by extruding a material such as aluminum having excellent heat conductivity (thermal conductivity). Yes. In addition, as shown in the figure, the housing 51 has a large number of cooling fins 52L and 52S extending in parallel along a cylindrical rotation axis on the entire outer peripheral surface thereof. A part of the outer peripheral surface of the housing 51 (upper part in the drawing) is formed with a mounting plane part 53 having a relatively large area for mounting the above-described case 30 for the power converter. In the horizontal direction, relatively large (longer extending) cooling fins 52L are formed.

  A stator 54 constituting the armature of the permanent magnet type rotating electric machine is inserted and fixed in the cylindrical housing 51, and the cylindrical inner space of the stator 54 is in the cylindrical inner space. A rotor (rotor) 55 configured by arranging a plurality of permanent magnets in a cylindrical shape is inserted, and is attached rotatably through a predetermined gap. Reference numeral 56 denotes a rotating shaft (shaft) formed integrally with the rotor (rotor) 55, and the rotational driving force of the rotating electrical machine is transmitted to a driven device such as a pump through the shaft. To do. Reference numeral 57 denotes an end bracket attached to the end portion of the housing 51 on the side opposite to the end bracket 11 described above, and 58 denotes the rotating shaft (shaft) 56 outside the end bracket 57. The centrifugal fan (cooling fan) attached is shown. In addition, the bearing which is not shown in figure is attached to the end bracket, and the rotating shaft is supported by the bearing.

  FIG. 3 is an exploded perspective view showing each part when the rotating electrical machine 50 described above is housed in the cover 10 shown in FIG. 1. In FIG. 3, the rotating electrical machine 50 has a substantially arc-shaped cross section in a part of the outer peripheral surface of the housing 51, for example, in a portion where a relatively short cooling fin 52 </ b> S around the lower part is formed in the illustrated example. The control board case 60 and the smoothing capacitor case 70 formed above are attached, and then inserted into the cover 10 (see arrows in the figure). In addition, a power switching element (such as an IGBT) or a temperature detector, which is a heat generating element constituting an inverter, is provided on the mounting flat portion 53 of the housing 51 through an opening 511 provided in a part of the cover 10. Is attached to a part thereof. And the case 30 for power converters for the protection is attached from the outside. Further, the terminal box 40 described above is attached to a part of the outer peripheral surface of the housing 51 (see the arrow in the figure). The above-described cooling fan cover 20 is attached to the other end (the left end in the figure) of the housing 51. Reference numeral 21 denotes a large number of small holes formed in a mesh shape for taking in external air in the substantially central portion of the wall surface of the cooling fan cover 20.

  That is, according to the rotating electrical machine assembly including the rotating electrical machine main body and its peripheral devices, the centrifugal fan 58 attached to the tip of the rotating shaft (shaft) 56 that rotates with the operation of the rotating electrical machine is provided. Rotating, air from the outside is guided to the inside of the cover 10 and flows between the cooling fins 52L and 52S formed on the outer peripheral surface of the housing 51 to exchange heat (see the white arrow in FIG. 2). ). Then, it flows out through a gap between the other end bracket 11. That is, the air flow generated by the rotation of the centrifugal fan 58 cools the housing 51 having a large number of cooling fins 52L and 52S formed on the outer peripheral surface thereof.

  Note that, as described above, the power conversion device 31 is a part of the housing 51 that is integrally provided on the outer periphery of the stator (stator) 54 in order to discharge the heat generated by the rotating electrical machine to the outside, that is, a mounting plane thereof. It is directly attached to the part 53. As a result, the power conversion device 31 is thermally integrated with the housing 51 formed of a material having excellent heat conductivity, and is a temperature detector inside the power conversion device 31. The temperature of 51 can be managed integrally.

  In particular, in the above-described embodiment, since the periphery of the mounting flat portion 53 formed on the upper portion of the cylindrical housing 51 in which the power conversion device 31 is disposed is thinner than the other portions, the power conversion The device 31 and the housing 51 are more thermally integrated.

  Further, as described above, according to the present embodiment, the control board case 60 and the capacitor case 70 are also attached to a part of the outer peripheral surface of the housing 51, so that heat is generated inside these cases. In the same manner as described above, the cooling fins 52L and 52S formed on the outer periphery of the housing 51 can be efficiently discharged to the outside.

  The control board case 60 contains a control interface (control board, control circuit, control microcomputer) and a communication interface board inside, and a resin material or the like is injected therein. It is also excellent in environmental resistance and impact resistance. By attaching the control board case 60 to a part of the rotating electrical machine, it is possible to perform a wireless / wired communication function with the outside as well as drive control of the outdoor installation pump. Also, according to this, for example, if a pressure sensor, a flow sensor, etc. are mounted on the control board, these amounts can be automatically controlled as a feedback signal, and further transmitted (communication) to the support sensor. Centralized management and integrated energy saving monitor system can be realized. In other words, this makes it possible to perform operation management and energy-saving operation of an outdoor pump, and to realize remote monitoring and control, centralized management, and systemization with a plurality of pumps.

  Further, the capacitor case 70 contains therein a smoothing capacitor that constitutes a part (component) of the inverter circuit of the power converter 31. Similarly to the above, a resin material or the like is contained therein. By injecting, environmental resistance and impact resistance are achieved. Moreover, although the DC reactor which comprises a part of inverter was demonstrated as what was integrated in a part of the said power converter device 31 in a present Example, this DC reactor is similarly in a special case. It may be built in and attached to a part of the outer peripheral surface of the housing 51.

  FIG. 4 is a partially cut perspective view illustrating another example of the positional relationship between the power conversion device attached to the housing and the stator in the rotating electrical machine assembly according to the present embodiment. As shown in FIG. 4, instead of the above embodiment, for example, the heat generating portion (mesh portion in the figure) H in the power conversion device 31 is centered on the plane portion 53 for attachment of the cylindrical housing 51. On the shaft, it is arranged so as to coincide with the position of the central portion (indicated by a broken line B in the figure) of the stator 54 that is the heat generating portion on the rotating electrical machine side. That is, the stator 54 is inserted so that B and H are in the same position. And if a temperature detector is installed and controlled in the area | region where the power converter device 31 and the housing 51 contact, the power converter device 31 and the housing 51 will be more thermally integrated, and exact temperature control will be attained.

  FIG. 5 shows a circuit configuration diagram of the power conversion device 31 in the present embodiment. The input AC power is converted into DC power by the forward converter 1. The converted DC power is smoothed by the smoothing capacitor 2, converted to AC power having an arbitrary frequency by the inverse converter 3 constituted by a power switching element, and supplied to the rotating electrical machine 50. The inverse converter is driven by the drive circuit 8. In addition, a temperature detector 9 is provided, temperature information detected by the temperature detector 9 is input to the control circuit 5, and the drive circuit 8 is controlled by a command from the control circuit 5 in consideration of the temperature information to increase or decrease the speed. I do. Various settings can be performed by the operation display unit 7 connected to the control circuit 5.

  The smoothing capacitor 2 is housed in a capacitor case 70, the control circuit 5 is housed in a control board case 60, and is structurally disposed at a position away from the power converter case 30.

  6A and 6B show the contents of the volatile memory and the nonvolatile memory stored in the storage unit in the control circuit in the control board. In addition, it does not have a memory | storage part in a control board, and it does not interfere even if it attaches a memory | storage device outside and substitutes.

  FIG. 6A shows the contents stored in the volatile memory in the storage unit. In FIG. 6A, the current carrier frequency CHN is stored at address 1001 of the volatile memory. The carrier frequency is a switching period of pulse width modulation of the output voltage output from the power converter, and there is a demerit that the higher the carrier frequency is, the quieter the operation sound is, but the more the amount of heat generated. In particular, by setting the carrier frequency to 15 kHz or 20 kHz that exceeds the human audible range, the driving sound of the motor can not be heard and the driving sound can be greatly reduced. Address 1002 stores the speed (output operating frequency) HzN currently commanded by the inverter to the rotating electrical machine, and address 1003 stores the current output current value (load current value of the rotating electrical machine) AmN of the inverter. Remember. It is possible to estimate the inverter load state from HzN and AmN. A value detected by the temperature detection means is stored at address 1004 as the current temperature detection value TeN. Address 1005 is not used in this embodiment.

  The remaining time TN1 of the temperature measurement cycle management timer is stored at address 1006. The remaining time TN2 of the operation state measurement cycle management timer is stored at address 1007. Address 1008 stores the current time (elapsed time from midnight) TiN, which is set in a time setting process described later. An elapsed time TeS from the start of temperature measurement is stored at address 1009.

  The temperatures of the rotating electrical machine and the inverter change not by the load at the moment when the temperature is detected but by the integration of the load state up to that point. For this reason, the integrated value HzS of the command speed measured at the driving state measurement cycle is stored at address 1101, and the integrated value HzS is a value (average value) obtained by dividing the integrated value HzS by an averaging number AvC described later. The inverter driving frequency HzA is stored. Similarly, with respect to the current value, the integrated value AmS of the output current value measured at the operating state measurement cycle is stored at address 1201, and the integrated value AmS is divided by the averaging count AvC (average value) at address 1202. Store AmA.

  The address 1301 stores a determination flag TeF for executing a temperature determination process described later when the temperature measurement period is reached. When TeF is 0, the temperature determination process is not executed, and when TeF is 1, the temperature determination process is performed.

  FIG. 6B shows the contents stored in the nonvolatile memory in the storage unit. In FIG. 6B, a flag SLT for determining whether or not to perform temperature gradient calculation is stored at address 2001 of the nonvolatile memory. When the SLT is 0, the temperature gradient calculation is not performed, and when the SLT is 1, the value detected by the temperature detector plus the result of the temperature gradient calculation is used as the current temperature detection value. A temperature gradient coefficient TG that varies depending on the part material is stored at address 2002, and a distance DS between the center of the heat generating portion and a measurement point (temperature detecting portion) by the temperature detector is stored at address 2003. An address 2004 stores a temperature drop amount TX obtained by calculation from the temperature gradient coefficient TG and the distance DS.

  The carrier frequency is stored in addresses 2011 to 2013. Keep track of the time and increase the carrier frequency at night to lower the driving noise, and conversely, increase the temperature by setting the carrier frequency lower during times when the outside air temperature during the day is high and cooling should be prioritized. In order to suppress this, the nighttime carrier frequency CHL is stored at address 2011, the normal carrier frequency CHD is stored at address 2012, and the daytime carrier frequency CHM is stored at address 2013.

  Address 2021 stores the cooling capacity of the rotating electrical machine (cooling capacity of the cooling fan) CoK. The number of rotations of the cooling fan also changes according to the number of rotations of the rotating electrical machine (inverter command speed), and the cooling amount can be approximated as the following (Equation 1) using a constant k1 within a certain number of rotations.

HzA ³ × CoK × k1 Equation 1
It should be noted that high-order approximation, a formula obtained by correcting these based on actual measurement, a data table, or the like may be used more accurately in the entire rotation speed range.

  The address 2022 stores a temperature increase coefficient (temperature increase amount with respect to load current) WaK of the rotating electrical machine. The temperature rise of the rotating electrical machine and the inverter changes depending on the output current value (load current value), and the constant k2 can be used to approximate the temperature rise amount as the following (Equation 2).

AmA ² × WaK × k2 ... Formula 2
It should be noted that approximations using higher-order equations, equations obtained by correcting these approximations based on actual measurements, data tables, and the like may be used.

  The set time (cycle for measuring temperature) TM1 of the temperature measurement cycle management timer is stored at address 2031. Stored at address 2032 is a set time (cycle for measuring the driving state) TM2 of the driving state measuring cycle management timer. Address 2033 stores a set time TeT from the start of temperature measurement until the time is determined.

  At address 2101, the command speed and the number of times AvC for averaging the output current value are stored. When the temperature measurement interval TM1 is sufficiently long, the averaging number AvC is preferably set equal to the number of times of measuring the command speed and the output current value while measuring the temperature once. When the temperature measurement interval TM1 is short, the averaging number AvC is preferably set to be equal to or more than the number of times of measuring the command speed and the output current value while measuring the temperature once. From the viewpoint of facilitating control, the averaging count AvC is set to be equal to the number of times the command speed and output current value are measured while measuring the temperature once, and when the measurement count reaches the averaging count AvC. It is desirable to store the temperature detection value TeN, the command speed and the average value of the output current HzA, AmA, and reset the integrated value HzS, AmS of the command speed and the output current value.

  At the address 3011, the determination temperature (ambient temperature) T01T determined by the temperature determination process described later at the first temperature detection (time 1), the command speed T01H at the time 1 at the address 3012, and the time 1 at the address 3013 The output current value T01A at is stored.

  In this embodiment, the temperature measurement cycle TM1 is set to 60 (60 minutes = 1 hour), and the temperature is detected 72 times (4320 minutes = 72 hours = 3 days). Store the current value. Especially in outdoor installations, the change in temperature due to the weather (sunshine) is large, so the measurement is performed 72 times so that the time is accurately determined regardless of the weather. Therefore, it is desirable that the measurement time (cycle × number) is large, but it is preferably about 3 days in consideration of the time until the first time setting. Even after the first time determination, the determination temperature, command speed, and output current value at each time are periodically stored, the time determination is performed, and the average value with the previous determination time is set as a new determination time. Accurate time can be grasped. However, if the purpose is to perform the determination up to the day of the week, a measurement of 10080 minutes (= 168 hours = 7 days) is required.

  The start time PT1S of the first time zone in which priority is given to temperature rise suppression (for example, morning) is stored at address 4001, and the end time PT1E of the first time zone in which priority is given to temperature rise suppression is stored at address 4002. The start time PT2S of the second time zone (for example, evening) where priority is given to temperature rise suppression is stored at address 4003, and the end time PT2E of the second time zone where priority is given to temperature rise suppression is stored at address 4004. On the other hand, the start time ST1S of the first time period (for example, nighttime) that prioritizes the reduction of driving sound is stored at address 4101, and the end time of the first time period that prioritizes the reduction of driving sound is stored at address 4102 Store ST1E. The start time ST2S of the second time zone (for example, after noon) that prioritizes the reduction of driving sound is stored at address 4103, and the end time ST2E of the second time zone that prioritizes the reduction of driving sound is stored at address 4104. To do. When setting a time zone that accurately matches the change in outside air temperature, it is desirable to set the temperature measurement cycle to half or less of the desired time width, but the ambient temperature does not change rapidly. A period of about 30 to 60 minutes is sufficient.

  Address 5001 stores a flag TJu indicating that the time determination is completed. The motor control setting process described later is executed after confirming that TJu is 1 (time determination is completed).

  FIG. 7 is a main control process flow diagram using the pump in this embodiment as an example. In FIG. 7, first, initialization processing of various functions is performed in 100 steps, and each control from 300 steps to 800 steps is repeatedly executed. In step 300, a temperature measurement process is performed. When the temperature measurement period is reached, a process for performing a temperature determination process is performed. In step 400, an operation state measurement process is performed. When the operation state measurement cycle is reached, a process for storing the command speed and the output current value is performed. In step 500, a temperature determination process is performed, and a determination temperature (ambient temperature) is calculated and stored from the temperature detection value, the command speed, and the output current value.

  In step 600, a time setting process is performed, and the time is estimated and set based on the relationship between a plurality of temperature determination results (a plurality of determination temperatures). In step 700, the set time is compared with a time stored in advance that prioritizes temperature rise suppression or a time that prioritizes reduction in driving sound, and the current time is the time that the motor control method changes from normal time. In the belt, a process for changing the motor control is performed.

  In step 800, pump control processing is performed. With the motor control setting of 700 steps, the temperature rise is further suppressed even during the operation at the same rotation speed (frequency), or the operation sound is further reduced to supply water.

  FIG. 8 is a process flowchart of the temperature measurement process 300 in this embodiment. In FIG. 8, it is determined in step 310 whether the remaining time TN1 of the temperature measurement cycle management timer is 0. If TN1 is 0, the flow proceeds to step 311. The temperature detected by the temperature detector in step 311 is stored in the current temperature detection value TeN, and the execution flag TeF of the temperature determination process is set to 1 (execution) in step 312. In step 313, the temperature measurement cycle management timer set value TM1 is set in the remaining time TN1 of the temperature measurement cycle management timer, and the process returns to the main control flow. The reason why TM1 is set to TN1 in step 313 is to perform temperature measurement again after the period TM1.

  If the remaining time TN1 of the temperature measurement cycle management timer is not 0 in step 310, the remaining time TN1 of the temperature measurement cycle management timer is counted down and stored in step 314. Thereafter, the process returns to the main control flow.

  FIG. 9 is a process flow diagram of the operation state measurement process 400 in the present embodiment. In FIG. 9, it is determined in step 410 whether the remaining time TN2 of the operation state measurement cycle management timer is 0. If TN2 is 0, the process proceeds to step 411. In step 411, the speed (command speed, output frequency) HzN currently instructed by the inverter to the rotating electrical machine is stored. In step 412, HzN is added to the command speed integrated value HzS, and HzS is updated. In step 413, the current value (load current value) AmN that the inverter is currently outputting to the rotating electrical machine is stored. In step 414, AmN is added to the integrated value AmS of the output current value, and AmS is updated. In step 415, the operation state measurement cycle timer set value TM2 is set in the remaining time TN2 of the operation state measurement cycle management timer, and the process returns to the main control flow. The reason why TM2 is set to TN2 in step 415 is to perform the operation state measurement process again after the period TM2.

  If the remaining time TN2 of the operation state cycle management timer is not 0 in step 410, the remaining time TN2 of the operation state measurement cycle management timer is counted down and stored in step 416. Thereafter, the process returns to the main control flow.

  FIG. 10 is a process flowchart of the temperature determination process 500 in this embodiment. In FIG. 10, in step 510, it is determined whether the execution flag TeF of the temperature determination process is 1 (execution). If TeF is 1 (execution), the process proceeds to step 511, and if TeF is 0 (none). Return to the main control flow. In step 511, the command speed average value HzA is calculated by the following (formula 3) from the command speed integrated value HzS and the averaging count AvC.

HzA = HzS ÷ AvC ... Equation 3
In step 512, the cooling amount is calculated using (Equation 1) from the average value HzA of the command speed and the cooling coefficient CoK. In step 513, the average value AmA of the output current value is calculated from the integrated value AmS of the output current value and the averaging count AvC by the following (formula 4).

AmA = AmS ÷ AvC Equation 4
In step 514, the temperature increase amount is calculated using (Equation 2) from the average value AmA of the output current and the temperature increase coefficient WaK. In step 515, the integrated value HzS of the command speed is returned to 0, and in step 516, the integrated value AmS of the output current value is returned to 0. In step 517, a determination temperature is calculated using (Expression 5) from the current temperature detection value TeN, the cooling amount obtained from (Expression 1) and (Expression 2), and the temperature increase amount. If it is the first determination, it is stored in the determination temperature T01T at time 1, and if it is the determination n, it is stored in the determination temperature TnT at time n.

(Judgment temperature) = TeN− (temperature rise amount) + (cooling amount) Equation 5
In step 518, the temperature determination process execution flag TeF is set to 0 (none), and the process returns to the main control flow.

  If the temperature gradient calculation is selected (SLT set value is 1), the value detected by the temperature detector in step 517 is not directly used as the current temperature detection value TeN, but the temperature gradient (Equation 6) and (Equation 7) below are calculated in consideration of the above.

TG × DS = TX Equation 6
(Temperature detection value) + TX = TeN Expression 7
As shown in FIG. 11, there is a difference in temperature between the actual heat generation part and the measurement point (temperature detection part), and the temperature difference is determined by the ease of heat transfer (temperature gradient coefficient) TG determined by the material of the part. It can be calculated by the distance DS between the heat generating part and the measurement point. As the distance increases or the temperature gradient coefficient increases, the amount of temperature decrease (temperature gradient) from the heat generating portion to the measurement point increases as shown in FIG. 12, and the detected temperature value and the actual heat generation amount The error will increase. By calculating in consideration of the temperature gradient, the current ambient temperature can be calculated more accurately by correcting the temperature difference between the temperature detection unit and the center of the heat generation unit where the amount of heat generation depends on the current. It becomes.

FIG. 13 is a process flow diagram of the time setting process 600 in this embodiment. In FIG. 13, it is determined in step 610 whether the temperature measurement elapsed time TeS has reached the temperature measurement time TeT. If so, the process proceeds to step 611, and if not, the process returns to the main control flow. In step 611, data having the highest value among the determination temperatures is set as a time “3 pm (900 minutes have elapsed since midnight)”. 0:00 pm is calculated from the difference between the time set at “3 pm” in step 612 and the current temperature measurement elapsed time TeS. For example, if data “3 pm (900 minutes elapsed)” is detected in the 30th measurement (1800 minutes elapsed) at a measurement period of 60 minutes, “0:00 am” is 900 minutes before “3 pm”. Therefore, from the following (formula 8),
1800−900 = 900 Expression 8
It can be seen that 900 minutes have elapsed since the start of temperature measurement. Also, since the next day “0:00 am” is 540 minutes after “3 pm”,
1800 + 540 = 2340 ... Formula 9
It can be seen that 2340 minutes have elapsed since the start of temperature measurement. This is assumed to be “midnight” (reference time).

  In step 613, the current time TiN can be calculated by the following (Equation 10) from “0:00 am” and the measurement elapsed time TeS from the start of measurement to the present (60 minutes × 72 times = 4320 minutes for 72 measurements). .

4320-2340 = 1980 Expression 10
Since one day is 1440 minutes (24 hours), if the solution of (Equation 10) is 1440 or more, it is subtracted at 1440 as shown in (Equation 11) below.

1980-1440 = 540 Equation 11
Therefore, it can be calculated as 9:00 am from 540 minutes (9 hours).

  In step 614, the time determination completion flag TJu is set to 1 (completed). In step 615, the temperature measurement elapsed time TeS is returned to 0, and the process returns to the main control flow.

  Although the extraction method of “3 pm” in step 612 is the highest determination temperature, the average value of the three data every 1440 minutes (= 24 hours) may be the highest, or the lowest determination temperature It may be “6:00 AM”. Or you may determine by the change point of temperature (decrease from rise, rise from decrease).

  If the characteristics of the air temperature are known in advance depending on the area or building where it is installed, the setting parameter for the judgment temperature is stored in the non-volatile memory. For example, when the judgment temperature is exceeded, a judgment such as “3 pm” is made. May be. In addition, three determination temperature parameters can be stored in the nonvolatile memory for summer, winter, spring and autumn, and the determination temperature can be set according to the season. In this case, for example, the temperature average value for one week of the detected temperature after installation is calculated, and the season is determined by the degree of increase or decrease in the temperature average value for each week and the degree of deviation between this temperature average value and the three judgment temperatures held in advance. By determining, which of the three determination temperature parameters is used can be automatically selected. Furthermore, the average temperature value for one week is averaged four times to calculate the average temperature for the month, and by holding this for 12 times, the temperature fluctuation range and transition for one year can be found. For example, the high temperature range 30% of this temperature fluctuation range uses the summer judgment temperature, the low temperature range 30% uses the winter judgment temperature, and the middle range uses the spring / autumn judgment temperature. Control may be performed.

  Further, the control giving priority to suppression of temperature rise and the control giving priority to reduction of driving sound may be determined directly from the temperature without performing time conversion when switching between them. For example, when the temperature exceeds the determination temperature held in the non-volatile memory, it is determined that the operation is daytime and priority is given to suppression of temperature rise, and when the temperature is lower, the control is determined to be night operation and priority is given to reduction of operation sound. . Furthermore, the detected temperature after installation may be held for one week, for example, and the average temperature value may be calculated, and this average temperature may be used as a direct determination value for this control switching. By using the average temperature for the most recent fixed period, the influence of seasonal and weather fluctuations can be reflected in the judgment value.

  FIG. 14 is a process flow diagram of the motor control setting process 700 in this embodiment. In FIG. 14, it is determined in step 710 whether the time determination completion flag TJu is 1 (completed). If TJu is 1 (completed), the process proceeds to step 720, and if TJu is 0 (incomplete), step 763 is performed. Proceed to

  In step 720, it is determined whether the current time TiN is a time zone between PT1S and PT1E set as a time zone in which priority is given to suppressing the temperature rise. If TiN is between PT1S and PT1E, step 761 is performed. If it is not the time zone between PT1S and PT1E, the process proceeds to step 730. Similarly, in step 730, it is determined whether the current time TiN is a time zone between PT2S and PT2E that is set as a time zone that prioritizes temperature rise suppression. If TiN is between PT2S and PT2E If no time zone between PT2S and PT2E, proceed to step 740.

  In step 740, it is determined whether the current time TiN is a time zone between ST1S and ST1E set as a time zone in which reduction of driving sound is prioritized. If TiN is between ST1S and ST1E, 762 is determined. If the time zone is not between ST1S and ST1E, go to step 750. Similarly, in step 750, it is determined whether the current time TiN is a time zone between ST2S and ST2E that is set as a time zone in which reduction of driving sound is prioritized, and TiN is between ST2S and ST2E. In this case, the process proceeds to step 762, and if it is not the time zone between ST2S and ST2E, the process proceeds to step 763.

  When the process proceeds to step 761, the daytime carrier frequency CHM is set to the current carrier frequency CHN, and the process returns to the main control flow. When the process proceeds to step 762, the night carrier frequency CHL is set to the current carrier frequency CHN, and the process returns to the main control flow. When the process proceeds to step 763, the normal carrier frequency CHD is set to the current carrier frequency CHN, and the process returns to the main control flow.

  As described above, the present embodiment has been described by taking the rotating electrical machine assembly in which the power conversion device and the like are integrated with the rotating electrical machine as an example. However, the present embodiment is not limited to this. For example, the rotating electrical machine and the power conversion device are separate, and the rotating electrical machine includes a temperature detector in the vicinity of the housing of the rotating electrical machine. The rotation control method of the rotating electrical machine may be changed according to the detected temperature of the rotating electrical machine. In other words, it is possible to grasp the ambient temperature using a temperature detector that measures the temperature of the power converter or the rotating electrical machine without using a dedicated temperature detector for measuring the outside air temperature, and depending on the ambient temperature. What is necessary is just to control a rotary electric machine.

  As described above, the present embodiment includes a rotating electrical machine having a housing, a stator attached to the housing, a rotor fixed to the rotating shaft, a bearing that supports the rotating shaft, and an end bracket to which the bearing is attached. A rotating electrical machine assembly comprising: a power converter that supplies a drive current to a stator of the rotating electrical machine; and a control board that controls the rotating electrical machine via the power converter; A temperature detector is provided in a region where the power converter and the housing are in contact with each other in the converter, and the control board is configured to change the control method of the rotating electrical machine according to the temperature detected by the temperature detector.

  A rotating electric machine having a housing, a stator attached to the housing, a rotor fixed to the rotating shaft, a bearing supporting the rotating shaft, and an end bracket to which the bearing is attached, the stator of the rotating electric machine Rotational control is performed via a power conversion device that supplies a drive current to the housing, a temperature detector is provided in the vicinity of the housing, and the rotation control method of the rotating electrical machine is changed according to the temperature detected by the temperature detector To do.

  Thereby, the component configuration for acquiring temperature information can be reduced, the ambient temperature can be grasped based on the temperature of the rotating electrical machine, and the rotating electrical machine can be controlled according to the ambient temperature.

  In the present embodiment, a case will be described in which the temperature rise suppression operation of the rotating electrical machine and the silent operation control for reducing the operation noise are controlled by changing the frequency modulation method of the pulse width modulation of the output voltage output from the power converter.

  In this embodiment, the present frequency modulation system PWN set by a motor control setting process described later is stored at address 1005 of the volatile memory shown in FIG. 6A. When PWN is 0, a two-phase modulation method (two-phase switching) is used, and when PWN is 1, a three-phase modulation method (three-phase switching) is used. Normally, three-phase modulation using all three phases of the inverter is performed, but the amount of heat generation can be reduced by performing two-phase switching. Two-phase switching has a demerit that the driving sound is increased instead of a decrease in the heat generation amount.

  A motor control setting process 700 in this embodiment is shown in FIG. In FIG. 15, it is determined in step 710 whether the time determination completion flag TJu is 1 (completed). If TJu is 1 (completed), the process proceeds to step 720, and if TJu is 0 (incomplete), step 766 is performed. Proceed to

  In step 720, it is determined whether or not the current time TiN is a time zone between PT1S and PT1E set as a time zone in which priority is given to temperature rise suppression. If TiN is between PT1S and PT1E, 764 steps are determined. If it is not the time zone between PT1S and PT1E, the process proceeds to step 730. Similarly, in step 730, it is determined whether the current time TiN is a time zone between PT2S and PT2E that is set as a time zone that prioritizes temperature rise suppression. If TiN is between PT2S and PT2E If no time zone is between PT2S and PT2E, the process proceeds to step 740.

  In step 740, it is determined whether the current time TiN is a time zone between ST1S and ST1E set as a time zone in which reduction of driving sound is prioritized. If TiN is between ST1S and ST1E, 765 is determined. If the time zone is not between ST1S and ST1E, go to step 750. Similarly, in step 750, it is determined whether the current time TiN is a time zone between ST2S and ST2E that is set as a time zone in which reduction of driving sound is prioritized, and TiN is between ST2S and ST2E. In this case, the process proceeds to step 765, and if it is not the time zone between ST2S and ST2E, the process proceeds to step 766.

  When the process proceeds to step 764, the current frequency modulation system is set to the two-phase modulation system (two-phase switching), and the process returns to the main control flow. When the process proceeds to step 765, the current frequency modulation method is set to the three-phase modulation method (three-phase switching), and the process returns to the main control flow. When the process proceeds to step 766, the frequency modulation method is not changed and the process returns to the main control flow. In step 766, the frequency modulation method is not changed. However, the two-phase modulation method may be given priority to the temperature rise suppression, or the three-phase modulation method may be given priority to the reduction of driving sound, depending on the environment used. It is desirable to make changes.

  It should be noted that the change of the carrier frequency of the first embodiment and the change of the frequency modulation method of the second embodiment may be implemented in combination, and it is obvious that the effect can be obtained by combining them.

  In this embodiment, the time is obtained by the same method as in the second embodiment. However, the time zone in which priority is given to temperature rise suppression / the time zone in which priority is given to the reduction of driving sound is given in advance from address 4001 to address 4104 in FIG. 6B. Rather than input, the ambient temperature is judged based on the judgment temperature at each time stored at addresses 3011 to 3721, and high / low time zones are automatically stored at addresses 4001 to 4104. It is something to be made.

  According to the present embodiment, it is not necessary to predict the surrounding environment in advance and input a time zone in which priority is given to temperature rise suppression / a time zone in which reduction of driving sound is prioritized. Since the time zone is automatically input, it becomes possible to grasp and set the change in the ambient temperature more accurately. In addition, when the time is set periodically, the time zone that prioritizes temperature rise suppression / the time zone that prioritizes the reduction of driving sound is reviewed (reset) every time the time is set. Control in consideration of the surrounding environment can be performed.

  The reference value for determining the time zone prioritizing temperature rise suppression / the time zone prioritizing the reduction of driving sound based on the judgment temperature at each time may be preset in the non-volatile memory. Since the average value of the ambient temperature differs depending on the value, it is desirable to obtain the reference value by calculation based on the average value or median value of the stored determination temperatures at each time.

  The present embodiment does not compare the current time with the time zone in which priority is given to temperature rise suppression / time zone in which reduction of driving sound is prioritized, but compares the current temperature detection value with the average value of the judgment temperatures. It is determined whether to give priority to temperature rise suppression or to give priority to reduction of driving noise.

  The difference between this embodiment and the other embodiments is that, in this embodiment, the ambient temperature of the day is compared with the average value of the most recent (several days, for example, 3 days) judgment temperature, and the temperature This is superior in that temperature suppression can be controlled when the temperature should be suppressed due to some unexpected external factor regardless of day or night. As in the third embodiment, the average value of the determination temperature may be calculated from the determination temperature at each time stored at addresses 3011 to 3721 in FIG. 6B. A reference value for giving priority to control of temperature suppression may be set in the nonvolatile memory in advance.

  A motor control setting process 700 in the present embodiment is shown in FIG. In FIG. 16, it is determined in step 710 whether the time determination completion flag TJu is 1 (completed). If TJu is 1 (completed), the process proceeds to step 721, and if TJu is 0 (incomplete), the main control is performed. Return to flow.

  In step 721, it is determined whether the current determination temperature is equal to or higher than the average value of the determination temperatures at each time. If the current determination temperature is equal to or higher than the average value, the process proceeds to step 761;

  When the process proceeds to step 761, the daytime carrier frequency CHM is set to the current carrier frequency CHN, and the process returns to the main control flow. When the process proceeds to step 762, the night carrier frequency CHL is set to the current carrier frequency CHN, and the process returns to the main control flow.

  Although the embodiments have been described above, the present invention is not limited to the above-described embodiments, and 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 configurations described. Further, a part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of one embodiment. Moreover, it is also possible to add, delete, and replace other configurations for a part of the configuration of each embodiment.

DESCRIPTION OF SYMBOLS 1 ... Forward converter, 2 ... Smoothing capacitor, 3 ... Reverse converter, 5 ... Control circuit, 7 ... Operation display part, 8 ... Drive circuit, 9 ... Temperature detector, 10 ... Cover, 11 ... End bracket, 20 ... Cooling fan cover, 30 ... Power conversion device case, 31 ... Power conversion device, 40 ... Terminal box, 50 ... Rotating electric machine, 51 ... Housing, 52L, 52S ... Cooling fins, 53 ... Flat part for mounting, 54 ... Stator 55 ... Rotor 56 ... Rotating shaft 58 ... Centrifuge fan 60 ... Control board case 70 ... Capacitor case

Claims (13)

A rotating electrical machine having a housing, a stator attached to the housing, a rotor fixed to the rotating shaft, a bearing supporting the rotating shaft, and an end bracket to which the bearing is attached;
A rotating electrical machine assembly in which a power conversion device that supplies a drive current to a stator of the rotating electrical machine and a control board that controls the rotating electrical machine via the power conversion device are arranged on an outer periphery of the housing. ,
A temperature detector is provided in a region where the power converter and the housing are in contact with each other in the power converter,
The rotating electrical machine assembly, wherein the control board changes a control method of the rotating electrical machine according to a temperature detected by the temperature detector. The rotating electrical machine assembly according to claim 1,
A terminal box is provided on the outer periphery of the housing,
A rotating electrical machine assembly, wherein a noise filter is built in the terminal box. The rotating electrical machine assembly according to claim 1,
The housing has a flat surface portion on which the power conversion device is disposed,
The rotating electrical machine assembly, wherein the flat portion is thinner than other portions. The rotating electrical machine assembly according to claim 1,
The rotating electrical machine assembly, wherein the power conversion device is disposed such that a center position of the power conversion device is a center position of a stator of the rotating electrical machine in a rotation axis direction of the housing. The rotating electrical machine assembly according to claim 1,
The rotating electrical machine assembly, wherein the control board corrects the temperature detected by the temperature detector to a temperature considering a temperature gradient of the housing, and performs control based on the correction value. The rotating electrical machine assembly according to claim 1,
The rotating electrical machine assembly, wherein the control board performs control to suppress heat generation of the rotating electrical machine when an ambient temperature of the rotating electrical machine is higher than a predetermined value. The rotating electrical machine assembly according to claim 1,
The rotating electrical machine assembly, wherein the control board performs control to suppress heat generation of the rotating electrical machine when an ambient temperature of the rotating electrical machine is higher than an average value in a predetermined time. The rotating electrical machine assembly according to claim 1,
When the ambient temperature of the rotating electrical machine is lower than a predetermined value, the control board performs control so as to suppress operation noise of the rotating electrical machine. The rotating electrical machine assembly according to claim 1,
When the ambient temperature of the rotating electrical machine is lower than an average value at a predetermined time, the control board performs control so as to suppress operation noise of the rotating electrical machine. The rotating electrical machine assembly according to claim 1,
The rotating electrical machine assembly, wherein the control board changes a carrier frequency, which is a switching cycle of pulse width modulation of an output voltage output from the power converter, based on an ambient temperature of the rotating electrical machine. The rotating electrical machine assembly according to claim 1,
The rotating electrical machine assembly, wherein the control board changes a frequency modulation method of pulse width modulation of an output voltage output from the power converter based on an ambient temperature of the rotating electrical machine. A rotating electrical machine having a housing, a stator attached to the housing, a rotor fixed to the rotating shaft, a bearing that supports the rotating shaft, and an end bracket to which the bearing is attached,
The rotation is controlled via a power converter that supplies a drive current to the stator of the rotating electrical machine,
A temperature detector in the vicinity of the housing;
A rotating electrical machine, wherein a rotation control method of the rotating electrical machine is changed according to a temperature detected by the temperature detector. The rotating electrical machine according to claim 12,
The temperature detector is provided in the power converter, and the rotating electrical machine and the power converter are thermally integrated.

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