CN116025554B - Method and device for controlling electric compressor based on common-mode inductance - Google Patents
Method and device for controlling electric compressor based on common-mode inductance Download PDFInfo
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Abstract
The invention discloses a method and a device for controlling an electric compressor based on common-mode inductance, which are applied to the electric compressor, wherein the method comprises the steps of acquiring a first module temperature value corresponding to a current sensor voltage value of a temperature sensor if an electric compressor running state with power is detected; acquiring a second module temperature value corresponding to the current inductance of the common-mode inductance module; acquiring a preset inductance core temperature estimation strategy, and acquiring the inductance core temperature of the common-mode inductance module based on the first module temperature value, the second module temperature value and the inductance core temperature estimation strategy; and if the temperature of the inductance core of the common-mode inductance module exceeds the preset temperature threshold value of the inductance core, controlling the motor-driven compressor to stop running. The method measures the temperature of the common-mode inductance core arranged on the PCB in the power device, and the sound temperature measurement method improves the accuracy of the temperature measurement of the common-mode inductance core and avoids the over-temperature failure of the motor control process based on the temperature measurement of the common-mode inductance core.
Description
Technical Field
The invention relates to the technical field of electric compressors, in particular to a method and a device for controlling an electric compressor based on common-mode inductance.
Background
The operation failure of the common-mode inductance module arranged in the electric compressor controller device is one of the reasons for the maximum operation failure of the controller, and the fact that the temperature of the common-mode inductance core in the common-mode inductance module exceeds the maximum operating temperature threshold is the most obvious reason for causing the common-mode inductance failure. The current electric compressor controller structure generally needs to sample the time temperature value of the common-mode inductance module on the radiator used by the electric compressor controller and is used as a reference for preventing the common-mode inductance module from overtemperature failure, but because the inductance coil port of the common-mode inductance module is contacted with the temperature sensor, the inductance magnetic core and the temperature sensor are respectively positioned in two different circuits and keep a certain distance space, the temperature value change induced by the temperature sensor and the temperature change of the inductance magnetic core have a certain difference, so that the actual temperature value of the inductance magnetic core cannot be directly and accurately measured, the error between the temperature of the inductance magnetic core and the measured value is ignored, the temperature sensor cannot accurately monitor the working temperature of the inductance magnetic core in the common-mode inductance module, the probability of reducing the overtemperature inductance of the inductance magnetic core in the common-mode inductance module is larger, and the operation of the common-mode inductance module and the compressor fails.
Disclosure of Invention
The embodiment of the invention provides a control method of an electric compressor based on common-mode inductance, which aims to solve the problem of failure in control operation of the electric compressor in the prior art.
In a first aspect, the embodiment of the invention discloses a control method of an electric compressor based on common-mode inductance, which is applied to the electric compressor, wherein a common-mode inductance module is arranged on a PCB (printed circuit board) of the electric compressor and is connected with a temperature sensor; if the electric compressor is detected to be in a power running state, acquiring a first module temperature value corresponding to the current sensor voltage value of the temperature sensor; acquiring a second module temperature value corresponding to the current inductance of the common-mode inductance module; acquiring a preset inductance core temperature estimation strategy, and acquiring the inductance core temperature of the common-mode inductance module based on the first module temperature value, the second module temperature value and the inductance core temperature estimation strategy; and if the temperature of the inductance core of the common-mode inductance module exceeds the preset temperature threshold value of the inductance core, controlling the motor-driven compressor to stop running.
Further, the obtaining a first module temperature value corresponding to the current sensor voltage value of the temperature sensor includes obtaining a current sensor resistance value of the temperature sensor according to the current sensor voltage value; and obtaining a first module temperature value of the common-mode inductance module according to the current sensor resistance value.
Further, before the obtaining the second module temperature value corresponding to the current inductance current, the method further includes obtaining the current inductance current of the common-mode inductance module and the sensor sampling temperature corresponding to the current inductance current; and performing least square fitting based on the current inductance current of the common-mode inductance module and the corresponding sensor sampling temperature to obtain a current-temperature fitting curve of the common-mode inductance module.
Further, the obtaining the second module temperature value corresponding to the current inductance current of the common-mode inductance module includes obtaining the second module temperature value corresponding to the current inductance current of the common-mode inductance module based on the current inductance current of the common-mode inductance module and the current-temperature fitting curve.
Further, the formula corresponding to the inductance core temperature estimation strategy is T j =T 1 +T 2 The method comprises the steps of carrying out a first treatment on the surface of the The method comprises the steps of obtaining a preset inductance core temperature estimation strategy, and obtaining the inductance core temperature of a common-mode inductance module based on the first module temperature value, the second module temperature value and the inductance core temperature estimation strategy, wherein the method comprises the steps of taking the first module temperature value and the second module temperature value as input parameters of a formula corresponding to the inductance core temperature estimation strategy, and calculating to obtain the inductance core temperature of the common-mode inductance module; wherein T is 1 Representing the temperature value of the first module, T 2 Representing the second module temperature value.
In a second aspect, the embodiment of the invention discloses an electric compressor control device based on a common-mode inductor, which is configured on an electric compressor and is characterized in that a common-mode inductor module is arranged on a PCB (printed circuit board) of the electric compressor and is connected with a temperature sensor; the electric compressor control device based on the common mode inductance comprises a first temperature acquisition unit, a second temperature acquisition unit and a control unit, wherein the first temperature acquisition unit is used for acquiring a first module temperature value of a common mode inductance module arranged on a PCB (printed circuit board) if the electric compressor is detected to be in a power running state; the second temperature acquisition unit is used for acquiring a second module temperature value corresponding to the current inductance current of the common-mode inductance module; the inductance core temperature obtaining unit is used for obtaining a preset inductance core temperature estimation strategy and obtaining the inductance core temperature of the common-mode inductance module based on the first module temperature value, the second module temperature value and the inductance core temperature estimation strategy; and the current control unit is used for reducing the current inductance current if the temperature of the inductance core with the common-mode inductance module exceeds the preset temperature threshold value of the inductance core.
Further, the test data acquisition unit is used for acquiring the current inductance current of the common-mode inductance module and the sensor sampling temperature corresponding to the current inductance current respectively; the fitting curve obtaining unit is used for carrying out least square fitting based on the current inductance current of the common-mode inductance module and the corresponding test temperature to obtain a current-temperature fitting curve of the common-mode inductance module.
Further, the second temperature obtaining unit is used for obtaining a current inductance voltage value corresponding to the current inductance current of the common-mode inductance module; and obtaining a second module temperature value corresponding to the current inductance current of the common-mode inductance module based on the current inductance voltage value of the common-mode inductance module and the current-temperature fitting curve.
According to the control method of the electric compressor based on the common-mode inductance and the power device heat dissipation device applying the method, the temperature of the common-mode inductance on the PCB in the power device is measured, the temperature measurement accuracy of the common-mode inductance is improved through a sound temperature measurement method, and the error of a motor control process based on the measurement of the common-mode inductance is reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic flow chart of a control method of an electric compressor according to an embodiment of the present invention;
FIG. 2 is a logic block diagram of a control method of an electric compressor according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a partial structure of a heat dissipating device for a power device according to an embodiment of the present invention;
fig. 4 is another schematic partial structure of a heat dissipating device for a power device according to an embodiment of the present invention.
Reference numerals:
1. a heat dissipation plate; 2. a temperature sensor; 3. common mode inductance; t1, a first module temperature value; t2, a second module temperature value; 4. a coil port.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be understood that the terms "comprises" and "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It is also to be understood that the terminology used in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be further understood that the term "and/or" as used in the present specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes such combinations.
As shown in fig. 1 and fig. 2, in a first aspect, an embodiment of the present invention discloses a control method of an electric compressor based on a common mode inductance, which is applied to an electric compressor, wherein a common mode inductance module 3 is arranged on a PCB board of the electric compressor, and the common mode inductance module 3 is connected with a temperature sensor 2; step S1, if the electric compressor is detected to be in a power running state, acquiring a first module temperature value T1 corresponding to a current sensor voltage value of the temperature sensor 2; step S2, obtaining a second module temperature value T2 corresponding to the current inductance current of the common-mode inductance module 3; s3, acquiring a preset inductance core temperature estimation strategy; s4, acquiring the temperature of the inductance core of the common-mode inductance module based on the first module temperature value T1, the second module temperature value T2 and the inductance core temperature estimation strategy; and S5, if the temperature of the inductance core of the common-mode inductance module 3 exceeds the preset temperature threshold value of the inductance core, controlling the electric compressor to stop running.
In an actual use scene, the control method of the electric compressor is used for controlling the operation or stop of power devices such as the electric compressor and the like with power, a PCB (printed circuit board) is arranged in the power devices and is used for setting a common-mode inductance module 3, the common-mode inductance module 3 comprises an inductance magnetic core and a coil port used for connecting the inductance magnetic core and an external temperature monitoring related part, a certain degree of interval space is reserved between the inductance magnetic core and the external temperature monitoring related part, a temperature sensor 2 and the common-mode inductance module 3 also have an actual temperature sampling error degree due to the complexity of a connecting structure, and the factors enable the temperature control failure critical to the safety in the control process of the power devices to be controlled, compared with the conventional control method of the electric compressor, the method optimizes the temperature sampling part of the common-mode inductance module 3 in the control process, divides the sampling structure conditions into two types according to the sampling structure conditions inside and outside the common-mode inductance module 3, respectively distinguishes the two types of temperature measurement values as a first module temperature value T1 and a second module temperature value T2, the first module temperature value T1 directly reads the temperature measurement value from the temperature sensor 3, the second temperature measurement value T1 directly has a critical temperature sampling error degree due to the complexity of the connecting structure, and the temperature measurement value T2 is not in the current-critical to the common-mode temperature monitoring temperature value T2, and the temperature measurement value is normally has a linear relation to the temperature measurement value of the temperature measurement value T2, and the temperature measurement value is normally different from the temperature measurement value of the common temperature value in the common temperature value, and the temperature value is better than the temperature value of the temperature measurement value is compared with the temperature value of the common temperature value and the temperature value T temperature value and has a normal temperature value and the temperature value is subjected to the temperature value and has a normal temperature value and a normal relation value and has a normal temperature value and normal temperature value is subjected to the temperature value to temperature value and is subjected to temperature value; after two types of temperature measurement values related to two sections of structures are obtained respectively, the two types of temperature measurement values are included into statistics according to a preset inductance magnetic core temperature estimation strategy to obtain a complete temperature measurement value, and the temperature measurement value has high accuracy.
Further, obtaining a first module temperature value of the temperature sensor corresponding to the current sensor voltage value includes obtaining a current sensor resistance value of the temperature sensor according to the current sensor voltage value; and obtaining a first module temperature value of the common-mode inductance module according to the current sensor resistance value.
Specifically, one end of the temperature sensor is connected to the PCB board and is disposed near the common-mode inductance module 3, the temperature sensor obtains a current temperature value according to a temperature sensing principle thereof, namely a first module temperature value T1, a circuit in the temperature sensor is serially provided with a first resistor R1 and a second resistor R2, a person knows a voltage V1 loaded on the circuit in the temperature sensor, the first resistor R1 is usually a common resistor, the second resistor R2 is an NTC resistor, the NTC resistor has a resistance-temperature related change characteristic, a voltage value and a resistance value of the second resistor R2 can be calculated through the known voltage value loaded in the temperature sensor and the resistance value of the first resistor R1, the current temperature value under the resistance value is obtained by further querying a resistance-temperature related change statistical table, namely the first module temperature value T1, the first module temperature value T1 and the inductance core temperature in the common-mode inductance module 3 have data relevance, and the user can further calculate an accurate inductance temperature according to the data relevance, and the accurate inductance temperature can be used for obtaining other temperature values and statistics under the common-mode inductance module 3.
Further, the current inductance current of the common-mode inductance module and the sensor sampling temperature corresponding to the current inductance current are obtained; and performing least square fitting based on the current inductance current of the common-mode inductance module and the corresponding sensor sampling temperature to obtain a current-temperature fitting curve of the common-mode inductance module.
Specifically, the second module temperature value T2 includes a temperature difference in an interval space between the coil port in the common-mode inductance module 3 and the temperature sensor 2, and there is a heat loss in the interval space, so that the heat generated by the actual operation of the inductance core in the common-mode inductance module 3 is partially lost in the interval space, so that the heat conducted from the coil port to the temperature sensor 2 is smaller than the actual heat, if the heat loss in the interval space is ignored, the reality of the operation temperature change condition reflected by the temperature value read by the temperature sensor 2 is obviously reduced, and therefore, the inclusion of the second module temperature value T2 in the temperature monitoring range is crucial to improving the temperature monitoring accuracy and the motor power control effectiveness; the current inductance current of the inductance core is obtained, a fitting curve of the relation between the current inductance current value and the temperature value related to the circuit in the temperature sensor 2 is established, the obtained temperature value is calculated according to the fitting curve between the current inductance current and the temperature value related to the circuit in the temperature sensor 2, namely the temperature value T2 of the second module, and the temperature change difference value caused by thermal motion in the interval space is furthest included in temperature monitoring.
Further, a second module temperature value corresponding to the current inductance current of the common-mode inductance module is obtained based on the current inductance current and the current-temperature fitting curve of the common-mode inductance module.
Furthermore, the formula corresponding to the inductance core temperature estimation strategy is T j =T 1 +T 2 The method comprises the steps of carrying out a first treatment on the surface of the Acquiring a preset inductance core temperature estimation strategy, and acquiring the inductance core temperature of the common-mode inductance module based on a first module temperature value, a second module temperature value and the inductance core temperature estimation strategy, wherein the inductance core temperature of the common-mode inductance module is calculated by taking the first module temperature value and the second module temperature value as input parameters of a formula corresponding to the inductance core temperature estimation strategy; wherein T is 1 Representing the temperature value of the first module, T 2 Representing a second module temperature value.
Specifically, as can be seen from the above description, before the common-mode inductance module 3 operates with power, a measuring device of a current value is connected to both ends of the common-mode inductance module 3 and a current measurement value is ready to be read, so as to obtain a current module current value of the corresponding common-mode inductance module 3, the current module current value is used for fitting calculation to obtain a second module temperature value T2, the MCU in the controller stores the sampled T2 and the current module current value of the common-mode inductance module 3, and when the inductance current and the temperature sensor temperature are sampled, the current is passed throughSearching corresponding data, reading corresponding numerical values, assigning the numerical values to T1, and adding the read T2 of the temperature sensor to obtain the temperature T of the inductance magnetic core j Is a value of (2).
And (3) testing the fitted current-temperature fitting curve to calculate the temperature of the inductance core at the current moment in real time.
Further, the formula corresponding to the inductance core temperature estimation strategy is T j =T 1 +T 2 The method comprises the steps of carrying out a first treatment on the surface of the Acquiring a preset inductance core temperature estimation strategy, and acquiring the inductance core temperature of the common-mode inductance module 3 based on a first module temperature value T1, a second module temperature value T2 and the inductance core temperature estimation strategy, wherein the inductance core temperature of the common-mode inductance module 3 is calculated by taking the first module temperature value T1 and the second module temperature value T2 as input parameters of a formula corresponding to the inductance core temperature estimation strategy; wherein T is i For final monitoring of inductor core temperature, T 1 Representing the first module temperature value T1, T 2 Representing a second module temperature value T2.
Specifically, the method relates to calculation and data summarization of a plurality of numerical values, the temperature numerical value fitting calculation can eliminate error values caused by the action of external interference factors, so that measured values accord with measurement practice to the greatest extent, temperature numerical value checking comprises current value checking and temperature numerical value fitting calculation value checking, and addition operation is used for summarizing and counting all measured temperature numerical values in a common-mode inductance module 3 and a space between the common-mode inductance module and a temperature sensor 2, so that the problem of large deviation of temperature measurement results of an inductance magnetic core with overlarge temperature difference in the space caused by thermal motion is avoided.
In a second aspect, as shown in fig. 3 and fig. 4, an embodiment of the present invention discloses an electric compressor control device based on a common mode inductance, which is configured in an electric compressor, wherein a common mode inductance module 3 is disposed on a PCB board of the electric compressor, and the common mode inductance module 3 is connected with a temperature sensor 2; the electric compressor control device based on the common mode inductance comprises a first temperature acquisition unit, a second temperature acquisition unit and a control unit, wherein the first temperature acquisition unit is used for acquiring a first module temperature value T1 of a common mode inductance module 3 arranged on a PCB (printed circuit board) if the electric compressor is detected to be in a power running state; the second temperature obtaining unit is used for obtaining a second module temperature value T2 corresponding to the current inductance current of the common-mode inductance module 3; the inductance core temperature obtaining unit is used for obtaining a preset inductance core temperature estimation strategy, and obtaining the inductance core temperature of the common-mode inductance module 3 based on the first module temperature value T1, the second module temperature value T2 and the inductance core temperature estimation strategy; and the current control unit is used for reducing the current inductance if the temperature of the inductance core of the common-mode inductance module 3 exceeds the preset temperature threshold value of the inductance core.
In an actual use scene, the common-mode inductance module 3 is arranged on the heat radiation plate 1, one end of the temperature sensor 2 is connected with a coil port 4 arranged on the common-mode inductance module 3 through the heat radiation plate 1, the current value of the inductance core temperature of the common-mode inductance module 3 is obtained and then compared with a preset inductance core temperature threshold value, if the current value is lower than the inductance core temperature threshold value, the current value is in a safe operation range and can continuously operate, if the current value is higher than the inductance core temperature threshold value, the current inductance current is reduced to enable the second module temperature value T2 to be reduced to be in the inductance core temperature threshold value, or the motor-driven compressor sends out an alarm and stops, and the operation with power is stopped to ensure safety.
Further, the device further comprises a test data acquisition unit, which is used for acquiring a plurality of test working voltages and test working currents of the common-mode inductance module 3, and a plurality of test temperatures respectively corresponding to the test working voltages or the test working currents; the fitting curve obtaining unit is used for performing least square fitting based on the test working current and the corresponding test temperature of the common-mode inductance module 3 to obtain a current-temperature fitting curve of the common-mode inductance module 3.
Specifically, the common-mode inductance module 3 includes the coil port 4 that the C utmost point is connected in inductance core and the common-mode inductance module 3, inductance core and temperature sensor 2 are connected respectively at the both ends of coil port 4, first module temperature value T1 is the reading of temperature sensor 2, temperature that temperature sensor 2 is interior based on the relevant temperature of NTC resistance in the sensor circuit can be regarded as to temperature sensor 2's reading, second module temperature value T2 specifically reflects the temperature difference between coil port 4 and the inductance core in the common-mode inductance module 3, two kinds of temperature measurement are summarized to be current inductance core temperature, such temperature monitoring strategy and its calculation method have avoided causing the neglect of difference in temperature to the heat loss, have promoted the accurate degree to inductance core temperature real-time supervision.
The invention discloses a control method and a control device of an electric compressor based on common-mode inductance, wherein the method comprises the steps of acquiring a first module temperature value T1 of a common-mode inductance module 3 arranged on a PCB (printed circuit board) if the electric compressor is detected to be in a power running state; acquiring a second module temperature value T2 corresponding to the current loss power of the common-mode inductance module 3; acquiring a preset inductance core temperature estimation strategy, and acquiring the inductance core temperature of the common-mode inductance module 3 based on the first module temperature value T1, the second module temperature value T2 and the inductance core temperature estimation strategy; if the temperature of the inductance core of the common-mode inductance module 3 exceeds the preset inductance core temperature threshold value, controlling the motor-driven compressor to stop running; the device comprises a heat dissipation plate 1 and a temperature sensor 2, and the temperature control method of the power device is applied; the heat dissipation plate 1 is used for installing a common mode inductance module 3 to be subjected to heat dissipation, and one end of the temperature sensor 2 is connected with the heat dissipation plate 1. According to the method and the device for controlling the electric compressor based on the common-mode inductance, through perfecting the monitoring step of the temperature value of the inductance magnetic core in the common-mode inductance module 3, the authenticity and the accuracy of the temperature monitoring of the inductance magnetic core in the electric compressor power device are remarkably improved, and the problem that the running risk of equipment cannot be shut down in time due to the fact that the common-mode inductance module 3 runs and is overheated and invalid due to the temperature monitoring error of the inductance magnetic core in the common-mode inductance module 3 is avoided.
The present invention is not limited to the above embodiments, and various equivalent modifications and substitutions can be easily made by those skilled in the art within the technical scope of the present invention, and these modifications and substitutions are intended to be included in the scope of the present invention. Therefore, the protection scope of the invention is subject to the protection scope of the claims.
Claims (7)
1. The control method of the electric compressor based on the common mode inductance is applied to the electric compressor and is characterized in that a common mode inductance module is arranged on a PCB of the electric compressor and is connected with a temperature sensor; the method comprises the following steps:
if the electric compressor is detected to be in a power running state, acquiring a first module temperature value corresponding to the current sensor voltage value of the temperature sensor;
acquiring a second module temperature value corresponding to the current inductance of the common-mode inductance module;
acquiring a preset inductance core temperature estimation strategy, and acquiring the inductance core temperature of a common-mode inductance module based on the first module temperature value, the second module temperature value and the inductance core temperature estimation strategy;
if the temperature of the inductance core of the common-mode inductance module exceeds the preset inductance core temperature threshold value, controlling the motor-driven compressor to stop running;
the formula corresponding to the inductance core temperature estimation strategy is T j =T 1 +T 2 The method comprises the steps of carrying out a first treatment on the surface of the The method comprises the steps of obtaining a preset inductance core temperature estimation strategy, and obtaining the inductance core temperature of a common-mode inductance module based on the first module temperature value, the second module temperature value and the inductance core temperature estimation strategy, wherein the method comprises the steps of taking the first module temperature value and the second module temperature value as input parameters of a formula corresponding to the inductance core temperature estimation strategy, and calculating to obtain the inductance core temperature of the common-mode inductance module; wherein T is 1 Representing the temperature value of the first module, T 2 Representing the second module temperature value.
2. The method for controlling an electric compressor based on common mode inductance according to claim 1, wherein the obtaining a first module temperature value of the temperature sensor corresponding to a current sensor voltage value includes:
acquiring a current sensor resistance value of a temperature sensor according to the current sensor voltage value;
and obtaining a first module temperature value of the common-mode inductance module according to the current sensor resistance value.
3. The method for controlling a common-mode inductance-based electric compressor according to claim 1, wherein the obtaining the common-mode inductance module is performed before the second module temperature value corresponding to the present inductance current, the method further comprising:
acquiring the current inductance current of the common-mode inductance module and the sensor sampling temperature corresponding to the current inductance current;
and performing least square fitting based on the current inductance current of the common-mode inductance module and the corresponding sensor sampling temperature to obtain a current-temperature fitting curve of the common-mode inductance module.
4. The method for controlling an electric compressor based on common-mode inductance according to claim 3, wherein the step of obtaining the second module temperature value corresponding to the current inductance of the common-mode inductance module includes:
and obtaining a second module temperature value corresponding to the current inductance current of the common-mode inductance module based on the current inductance current of the common-mode inductance module and the current-temperature fitting curve.
5. An electric compressor control device based on common-mode inductance is configured on an electric compressor and is characterized in that a common-mode inductance module is arranged on a PCB (printed circuit board) of the electric compressor and is connected with a temperature sensor; an electric compressor control device based on common mode inductance, comprising:
the first temperature acquisition unit is used for acquiring a first module temperature value of a common-mode inductance module arranged on the PCB if the electric compressor is detected to be in a power running state;
the second temperature acquisition unit is used for acquiring a second module temperature value corresponding to the current inductance current of the common-mode inductance module;
the inductance core temperature obtaining unit is used for obtaining a preset inductance core temperature estimation strategy and obtaining the inductance core temperature of the common-mode inductance module based on the first module temperature value, the second module temperature value and the inductance core temperature estimation strategy;
the current control unit is used for reducing the current inductance current if the temperature of the inductance core with the common-mode inductance module exceeds the preset inductance core temperature threshold value;
the formula corresponding to the inductance core temperature estimation strategy is T j =T 1 +T 2 The method comprises the steps of carrying out a first treatment on the surface of the Acquiring a preset inductance core temperature pre-estimation strategy; the inductance core temperature obtaining unit is specifically configured to calculate the inductance core temperature of the common-mode inductance module by using the first module temperature value and the second module temperature value as input parameters of a formula corresponding to the inductance core temperature estimation strategy; wherein T is 1 Representing the temperature value of the first module, T 2 Representing the second module temperature value.
6. The common-mode inductance-based motor-driven compressor control device according to claim 5, further comprising:
the test data acquisition unit is used for acquiring the current inductance current of the common-mode inductance module and the sensor sampling temperature corresponding to the current inductance current respectively;
and the fitting curve acquisition unit is used for carrying out least square fitting based on the current inductance current of the common-mode inductance module and the corresponding test temperature to obtain a current-temperature fitting curve of the common-mode inductance module.
7. The electric compressor control device based on common mode inductance according to claim 5, wherein the second temperature obtaining unit is configured to:
and obtaining a second module temperature value corresponding to the current inductance current of the common-mode inductance module based on the current inductance current and the current-temperature fitting curve of the common-mode inductance module.
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| CN106481537B (en) * | 2016-11-25 | 2018-11-27 | 广东美的制冷设备有限公司 | Control method, device and the household electrical appliance of compressor |
| CN107882763B (en) * | 2017-11-09 | 2020-02-14 | 英业达科技有限公司 | Rotational speed control device and method thereof |
| WO2019131740A1 (en) * | 2017-12-27 | 2019-07-04 | 古河電気工業株式会社 | Rechargeable battery temperature estimation device and rechargeable battery temperature estimation method |
| CN108447649A (en) * | 2018-05-21 | 2018-08-24 | 福州通立工业设计有限公司 | A kind of common mode inductance preventing short circuit |
| CN112213638B (en) * | 2020-10-28 | 2021-12-14 | 瑞声新能源发展(常州)有限公司科教城分公司 | Heating state monitoring method of motor coil, related equipment and medium |
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