CN112172527B - IGBT temperature protection frequency conversion control method for electric automobile - Google Patents

IGBT temperature protection frequency conversion control method for electric automobile Download PDF

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CN112172527B
CN112172527B CN202011041931.8A CN202011041931A CN112172527B CN 112172527 B CN112172527 B CN 112172527B CN 202011041931 A CN202011041931 A CN 202011041931A CN 112172527 B CN112172527 B CN 112172527B
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switching frequency
igbt
temperature
frequency
rotating speed
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CN112172527A (en
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刘立
陈健
彭志远
杜长虹
周安健
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Deep Blue Automotive Technology Co ltd
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Chongqing Changan New Energy Automobile Technology Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
    • B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
    • B60L3/0084—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to control modules
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
    • B60L15/007—Physical arrangements or structures of drive train converters specially adapted for the propulsion motors of electric vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
    • B60L15/20—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/40—Drive Train control parameters
    • B60L2240/42—Drive Train control parameters related to electric machines
    • B60L2240/421—Speed
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/72—Electric energy management in electromobility

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Inverter Devices (AREA)

Abstract

The invention relates to an IGBT temperature protection variable frequency control method for an electric automobile, which designs variable frequency control with matched switching frequency and working temperature on the basis of fully considering various influence factors influencing the switching frequency, obtains the most appropriate switching frequency through online calibration of parameters and carries out regulation control on a power module, thereby achieving the purpose of protecting the thermal stability of the IGBT, simultaneously limits the regulation gradient of the switching frequency in the control, avoids output current mutation caused by rapid regulation, and effectively prevents a current loop from being out of control. The method is simple and effective, and the working temperature of the device can be kept within a normal range by adjusting the switching frequency.

Description

IGBT temperature protection frequency conversion control method for electric automobile
Technical Field
The invention relates to a variable frequency control technology, in particular to an IGBT temperature protection variable frequency control method.
Background
With the continuous improvement of the performance of electric vehicles and the rapid development of automatic driving technologies, the requirements on the efficiency and reliability of electric vehicles are higher. An Insulated Gate Bipolar Transistor (IGBT) is used as a core part of an electric automobile power system, and the high performance and the high reliability of the IGBT are very important.
For the electric automobile, the uncertainty of the operation of the electric automobile is caused due to the complexity and the variability of the external environment and the operation working condition, and the application environment of the IGBT is more severe. Among them, failure due to excessive temperature is the main cause of IGBT failure. For product design, the current output capacity and the switching frequency of the IGBT are increased, so that better power performance can be brought to the whole vehicle, but high current output and high switching frequency can also cause more IGBT switching losses, the temperature rise of a chip can be increased under the condition of unchanged heat dissipation capacity, and the probability of thermal failure is increased.
If the IGBT for the electric automobile works under high switching frequency in a short time, the risk of power interruption caused by over-temperature of the module is faced; if operated at high switching frequencies for extended periods of time, the accumulated thermal stress will cause thermal failure. Therefore, it is very important to develop a frequency conversion control algorithm for matching the switching frequency and the operating temperature to protect the IGBT.
The method for reading the prior art and protecting the IGBT temperature through frequency conversion control mainly focuses on two aspects: firstly, the junction temperature of the IGBT is monitored, and when the junction temperature exceeds a junction temperature protection threshold value, the switching frequency is reduced, and the heat loss is reduced. For example, patent document No. CN201410212333.0 discloses an over-temperature closed-loop protection method for an elevator inverter IGBT based on switching frequency adjustment. The IGBT temperature of the inverter is dynamically adjusted by estimating the IGBT junction temperature and establishing a temperature closed loop, so that the system can be always in a slow and stable running state. The method is used for controlling the industrial rectifier and the inverter with simpler working conditions, so that the variable frequency regulation step length is fixed, and the method cannot be directly applied to the complex working conditions of the electric automobile. And secondly, the output of the frequency converter can be adjusted by dynamically monitoring the junction temperature of the IGBT with high precision. Patent document No. CN201610186980.8 discloses a method for protecting an IGBT from an excessive temperature in an inverter. Starting from the characteristic relation between the switching frequency and the output current, the IGBT junction temperature is accurately monitored with high reliability. The method only refers to a method for monitoring the junction temperature of the IGBT, but a scheme for controlling the switching frequency is not provided, so that the temperature protection cannot be carried out on the IGBT.
Disclosure of Invention
The invention aims to provide an IGBT temperature protection variable frequency control method for an electric automobile, which balances the heat loss of an IGBT by adjusting the switching frequency and ensures that the working temperature of the IGBT is maintained in a normal range.
The technical scheme of the invention is obtained on the basis of the following analytical research by the applicant:
in the technology, the temperature protection of the IGBT is actually the detection and control of the junction temperature of the IGBT. There are several methods for finding the average junction temperature in the prior art, and the present invention preferably uses the average junction temperature TjThe calculation formula is as follows:
Tj＝PavRth+Th
in the above formula, PavAverage loss of IGBT, RthThe thermal resistance from the IGBT junction to the shell is obtained by inquiring a data manual of the IGBT, ThThe temperature of the IGBT case is directly measured by a thermistor.
In the prior art, there are various methods for calculating average loss, and the IGBT average loss P preferred by the inventionavThe calculation formula is as follows:
Pav＝Pcond+Psw
in the above formula, PcondFor the conduction loss, P, of the IGBTswFor the switching loss of the IGBT, the calculation formulas of the IGBT and the IGBT are as follows:
Figure BDA0002706900810000021
Figure BDA0002706900810000022
in the above two formulae, VCEORepresents the saturation voltage; i represents the output current; r represents the equivalent impedance of the IGBT; m represents a coefficient of 1.1;
Figure BDA0002706900810000023
representing a power factor; f. ofsRepresents the switching frequency; rGRepresents a drive resistor external to the IGBT; eon(RG) Representing the turn-on loss of the IGBT during switching; eoff(RG) Represents the turn-off loss of the IGBT during switching; i isnomRepresents the nominal current of the IGBT; vdcRepresents the bus voltage; vnomRepresenting the nominal terminal voltage of the IGBT. Relevant parameters can be found in the data sheet of the IGBT.
When the IGBT type selection is determined, the saturation voltage VCEOEquivalent impedance r, power factor
Figure BDA0002706900810000024
Can be consulted through a data manual. So that conduction loss PcondCan be approximately considered to be related to the output current i:
Pcond＝Pcond(i)
in addition, the turn-on loss E of the IGBTon(RG) Turn-off loss Eoff(RG) Nominal current InomNominal terminal voltage VnomThey can be consulted in handbooks. Thus the switching loss PswCan be approximated to the output current i, the switching frequency fsBus voltage VdcAnd (3) correlation:
Psw＝Psw(i,fs,Vdc)
combining the above formula, a new IGBT junction temperature formula can be derived:
Tj＝PavRth+Th＝[Pcond(i)+Psw(i,fs,Vdc)]·Rth+Th
analytical equation, IGBT junction temperature TjFollowing switching frequency fsBus voltage VdcTemperature T of IGBT casehThe output current i. Wherein the bus voltage VdcTemperature T of IGBT casehThe output current i is directly or indirectly detected by a sensor, and the formula is simplified as follows:
Tj＝Tj(fs,i,Vdc,Th)
therefore, if the output current i and the bus voltage V at this time are knowndcTemperature T of IGBT casehThe switching frequency f can be actively adjusted by means of a control algorithmsTo ensure the junction temperature TjRemain substantially stable.
Secondly, the motor speed spd of the electric vehicle follows the switching frequency fsAnd (4) correlating. For controlling the sine of the output current, the switching frequency f is increased when the motor speed spd is increasedsAnd correspondingly increased. In general, the switching frequency f is increased from 0 to 15000r/min during the motor speed spdsFrom 2kHzThe switching frequency raised to 10kHz, for example 6kHz, is not suitable for the high-speed control of 10000r/min motor. Thus adjusting the switching frequency fsIn time, the current motor speed spd should also be considered:
Tj＝Tj(fs,i,Vdc,Th,spd)
in the above formula, the output current, the bus voltage, the IGBT case temperature, and the motor rotation speed are all values obtained by an external sensor. Firstly, the output current, the bus voltage, the IGBT shell temperature and the motor rotating speed are combined and matched respectively, then the applicable switching frequency is obtained, and finally the optimal switching frequency is selected.
In addition, the adjustment gradient of the switching frequency needs to be limited, so that sudden change of the output current caused by rapid adjustment is avoided, and the current loop is prevented from being out of control.
Thus, the applicant proposes the following technical solutions of the present invention:
an IGBT temperature protection frequency conversion control method for an electric automobile comprises the following steps:
1. the sensor collects the rotating speed of the motor and the bus voltage and sends the rotating speed of the motor and the bus voltage to the matching module of the rotating speed of the motor and the bus voltage, and a first switching frequency is obtained through the matching of the rotating speed of the motor and the bus voltage. The motor rotating speed and bus voltage matching module is used for outputting a corresponding relation table of different switching frequencies under different motor rotating speed and bus voltage input combination conditions by taking the motor rotating speed and the bus voltage as input and obtained through calibration.
2. Meanwhile, the motor rotating speed and the IGBT shell temperature are collected by a sensor and sent to a motor rotating speed and IGBT shell temperature matching module, and second switching frequency is obtained through matching of the motor rotating speed and the IGBT shell temperature. The motor rotating speed and IGBT shell temperature matching module takes the motor rotating speed and the IGBT shell temperature as input, and outputs a corresponding relation table of different switching frequencies under different motor rotating speed and IGBT shell temperature input combination conditions.
3. Meanwhile, the output current and the temperature of the IGBT shell are collected by a sensor and sent to an output current and IGBT shell temperature matching module, and the third switching frequency 16 is obtained through matching of the output current and the temperature of the IGBT shell. The output current and IGBT shell temperature matching module takes current and IGBT shell temperature obtained through calibration as input, and outputs a corresponding relation table of different switching frequencies under different output current and IGBT shell temperature input combination conditions.
4. And processing the first switching frequency, the second switching frequency and the third switching frequency by an optimal switching frequency module to obtain a fourth switching frequency 10. The switching frequency optimization module is used for obtaining the minimum value of the switching frequency.
5. And processing the fourth switching frequency by a gradient adjusting module, limiting the adjusting gradient of the switching frequency, and outputting the final switching frequency.
The switching frequency gradient adjusting module takes the switching frequency obtained by processing of the gradient adjusting module as one input, takes the switching frequency acquired in real time at the last moment as the second input, and outputs the final switching frequency through gradient adjusting calculation.
Further, the gradient adjustment calculation means that the output switching frequency calculated in real time at present is subtracted from the output switching frequency at the previous moment, and if the result is smaller than the maximum allowable gradient limit value, the output switching frequency calculated in real time at present is taken as the output switching frequency; and if the subtraction result is greater than the allowed maximum gradient limit value, superposing the allowed maximum gradient limit value on the current output switching frequency calculated in real time to serve as the output switching frequency.
The invention has the advantages that:
the control method of the invention designs a variable frequency control algorithm with the matching of the switching frequency and the working temperature on the basis of fully considering various influence factors influencing the switching frequency, and obtains the most appropriate switching frequency through online calibration of parameters to carry out regulation and control on the power module, thereby achieving the purpose of protecting the thermal stability of the IGBT.
Meanwhile, the adjustment gradient of the switching frequency is limited in control, so that sudden change of output current caused by rapid adjustment is avoided, and the current loop is effectively prevented from being out of control. The method is simple and effective, and the working temperature of the device can be kept within a normal range by adjusting the switching frequency.
Drawings
Fig. 1 is a system block diagram of an IGBT temperature protection frequency conversion control method.
Fig. 2 is a schematic diagram of the switching frequency matching by the motor speed and the bus voltage.
Fig. 3 is a schematic diagram of switching frequency matching through motor rotation speed and IGBT case temperature.
Fig. 4 is a schematic diagram of the switching frequency matching the IGBT case temperature by the output current.
Fig. 5 is a block diagram of a switching frequency gradient adjustment algorithm.
Detailed Description
The invention is further described with reference to the accompanying drawings in which:
the IGBT temperature protection frequency conversion control method shown in FIG. 1 comprises an input signal motor rotating speed 1, a bus voltage 2, a motor rotating speed 3, an IGBT shell temperature 4, a motor rotating speed and bus voltage matching module 5, a motor rotating speed and IGBT shell temperature matching module 6, a first switching frequency 7, a second switching frequency 8, an optimal selecting module 9, a fourth switching frequency 10, a switching frequency gradient adjusting module 11, a final switching frequency 12, an output current 13, an IGBT shell temperature 14, an output current and IGBT shell temperature matching module 15 and a third switching frequency 16.
The method comprises the following steps:
first, the following three frequency values are obtained.
1. The motor rotating speed 1 and the bus voltage 2 collected by the sensor are sent to a motor rotating speed and bus voltage matching module 5 together, and a first switching frequency 7 is obtained through calibration matching of the motor rotating speed and the bus voltage.
2. The motor rotating speed 3 and the IGBT shell temperature 4 collected by the sensor are sent into a motor rotating speed and IGBT shell temperature matching module 6 together, and a second switching frequency 8 is obtained through matching of the motor rotating speed and the IGBT shell temperature.
3. The output current 13 obtained by the sensor and the IGBT shell temperature 14 are sent to an output current and IGBT shell temperature matching module 15, and the third switching frequency 16 is obtained by matching the output current and the IGBT shell temperature.
It should be noted that the values of the motor speed 1 and the motor speed 3 are the same, and the IGBT case temperature 4 and the IGBT case temperature 14 are the same.
Second, the above switching frequency is optimized.
And after the first switching frequency 7, the second switching frequency 8 and the third switching frequency 16 pass through the switching frequency optimal selection module 9, obtaining a fourth switching frequency 10, and comparing the optimal selection frequency with a plurality of frequencies to obtain the minimum value.
And thirdly, the current control instability caused by the quick adjustment of the switching frequency is avoided by the gradient adjustment.
And outputting a final switching frequency 12 after passing the optimized switching frequency 10 through a gradient adjusting module 11.
In this embodiment, the module for matching the switching frequency with the motor speed and the bus voltage is shown in fig. 2, and outputs a corresponding relationship table of different switching frequencies under different input combination conditions of the motor speed and the bus voltage by using the motor speed and the bus voltage as inputs. It is worth noting that the motor speed, the bus voltage and even the switching frequency under various combination conditions can be calibrated. This is an engineered match made so that the control algorithm can be used with different models of IGBT modules.
In this embodiment, the switching frequency module matched with the motor rotation speed and the IGBT shell temperature is as shown in fig. 3, and outputs different switching frequencies under different input combination conditions of the motor rotation speed and the IGBT shell temperature, with the motor rotation speed and the IGBT shell temperature as inputs. Wherein, it is worth noting that the motor speed, the IGBT shell temperature and even the switching frequency under various combination conditions can be calibrated. This is an engineered match made so that the control algorithm can be used with different models of IGBT modules.
In this embodiment, the output current and IGBT case temperature matching switching frequency module is shown in fig. 4. And the output current and the IGBT shell temperature are used as input, and different switching frequencies are output under different output current and IGBT shell temperature input combination conditions. It is worth noting that the output current, the IGBT shell temperature and even the switching frequency under various combination conditions can be calibrated. This is an engineered match made so that the control algorithm can be used with different models of IGBT modules.
For the switching frequency gradient adjusting module adopted by the present invention, a further embodiment shows the switching frequency gradient adjusting module shown in fig. 5, which includes a switching frequency 1, a switching frequency 2, a switching frequency 3, a frequency gradient limit value 4, a frequency gradient limit value 5, and a register module 6.
In the figure, the switching frequency 1, which is one of the inputs, is the switching frequency 10 in the "IGBT temperature protection variable frequency control algorithm" of fig. 1. The switching frequency 2 as the input two is the same as the switching frequency 3, and when the switching frequency 3 is output, the value is also stored in the register module 6. The value of the switching frequency 2 is therefore taken from the register block 6. It should be noted that the output gradient of the switching frequency 3 can be adjusted by calibrating the frequency gradient limit 4 and the frequency gradient limit 5.
The switching frequency gradient adjusting module takes the minimum value of the switching frequency, namely the switching frequency 1, as one input, takes the switching frequency 2, namely the switching frequency at the last moment, acquired in real time, as the second input, and outputs the final switching frequency through gradient adjusting calculation. The gradient adjustment calculation is to subtract the output switching frequency calculated in real time at present from the output switching frequency at the previous moment, and if the result is less than the allowed maximum gradient limit value, the output switching frequency calculated in real time at present is taken as the output switching frequency; if the subtraction result is greater than the "maximum allowable gradient limit value", the "maximum allowable gradient limit value" is superimposed on the output switching frequency currently calculated in real time, and the output switching frequency is used as the output switching frequency.
It is particularly pointed out that the "maximum gradient limit allowed" is preset to 0.5kHz, and that different power modules can be adapted by calibration.

Claims (7)

1. An IGBT temperature protection frequency conversion control method for an electric automobile is characterized by comprising the following steps:
(1) the method comprises the steps that a sensor collects the rotating speed of a motor and the bus voltage and sends the rotating speed and the bus voltage to a motor rotating speed and bus voltage matching module (5), and a first switching frequency is obtained through matching of the rotating speed of the motor and the bus voltage;
(2) meanwhile, the motor rotating speed and the IGBT shell temperature are collected by a sensor and sent to a motor rotating speed and IGBT shell temperature matching module, and a second switching frequency is obtained through matching of the motor rotating speed and the IGBT shell temperature; the motor rotating speed and IGBT shell temperature matching module is used for outputting a corresponding relation table of different switching frequencies under different motor rotating speed and IGBT shell temperature input combination conditions by taking the motor rotating speed and the IGBT shell temperature as input obtained through calibration;
(3) meanwhile, the output current and the temperature of the IGBT shell are collected by a sensor and sent to an output current and IGBT shell temperature matching module, and the third switching frequency is obtained by matching the output current and the temperature of the IGBT shell; the output current and IGBT shell temperature matching module takes the current obtained by calibration and the IGBT shell temperature as input, and outputs a corresponding relation table of different switching frequencies under different input and combination conditions of the output current and the IGBT shell temperature;
(4) the first switching frequency, the second switching frequency and the third switching frequency are processed through a switching frequency optimal module (9) to obtain a fourth switching frequency;
(5) and processing the fourth switching frequency by a gradient adjusting module, limiting the adjusting gradient of the switching frequency, and outputting the final switching frequency.
2. The IGBT temperature protection frequency conversion control method for the electric automobile according to claim 1, wherein the motor speed and bus voltage matching module is obtained by calibration, takes the motor speed and the bus voltage as input, and outputs a corresponding relation table of different switching frequencies under different motor speed and bus voltage input combination conditions.
3. The IGBT temperature protection variable frequency control method for the electric automobile according to claim 1 or 2, characterized in that the switching frequency optimization module is a minimum value of the switching frequency.
4. The IGBT temperature protection frequency conversion control method for the electric automobile according to claim 1 or 2, characterized in that the switching frequency gradient adjusting module outputs the final switching frequency through gradient adjustment calculation by using the fourth switching frequency obtained through the processing of the switching frequency optimal module as one of the inputs and the switching frequency of the last moment acquired in real time as the second input.
5. The IGBT temperature protection frequency conversion control method for the electric vehicle as claimed in claim 4, wherein the gradient adjustment calculation is to subtract the output switching frequency calculated in real time at present from the output switching frequency at the previous moment, and if the result is less than the maximum allowable gradient limit value, the output switching frequency calculated in real time at present is taken as the output switching frequency; and if the subtraction result is greater than the allowed maximum gradient limit value, superposing the allowed maximum gradient limit value on the current output switching frequency calculated in real time to serve as the output switching frequency.
6. The IGBT temperature protection frequency conversion control method for the electric automobile according to claim 5, characterized in that the allowable maximum gradient limit value is adopted in the gradient adjustment calculation to adapt to different power modules through calibration.
7. The IGBT temperature protection variable frequency control method for the electric automobile according to claim 6, characterized in that the allowed maximum gradient limit value is preset to 0.5 kHz.
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CN114442694B (en) * 2021-12-31 2023-03-21 重庆长安新能源汽车科技有限公司 Self-calibration silicon carbide motor controller junction temperature estimation method
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CN107395039A (en) * 2016-05-11 2017-11-24 福特全球技术公司 For reducing the double mode IGBT raster data models of switching loss
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Publication number Priority date Publication date Assignee Title
CN101091304A (en) * 2004-12-28 2007-12-19 丰田自动车株式会社 Motor control unit and vehicle equipped therewith
CN105577069A (en) * 2016-01-11 2016-05-11 湖南大学 Active thermal optimization control method and device of electromobile driving system
CN107395039A (en) * 2016-05-11 2017-11-24 福特全球技术公司 For reducing the double mode IGBT raster data models of switching loss
CN108258947A (en) * 2016-12-28 2018-07-06 上海大郡动力控制技术有限公司 The method that electric vehicle motor controller inhibits high-frequency noise
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