CN115534690A - Heating control method and device based on three-phase inversion power switch module - Google Patents
Heating control method and device based on three-phase inversion power switch module Download PDFInfo
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 96
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- 238000004364 calculation method Methods 0.000 claims description 5
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- 230000020169 heat generation Effects 0.000 abstract 1
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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
- B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/02—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant
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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
- 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
Abstract
The application provides a heating control method and a device based on a three-phase inversion power switch module, and the method comprises the following steps: detecting half-bridge current of an inversion half bridge in a three-phase inversion switch module; and adjusting the half-bridge dead time of the inverter half bridge based on the half-bridge current and the current switch ripple so as to correspondingly adjust the body diode heating power of the field effect tube in the three-phase inverter switch module. It can be seen that the implementation of this embodiment can realize the effect of high-efficiency heat generation of the MOSFET body diode by controlling and adjusting the dead time.
Description
Technical Field
The application relates to the field of vehicle heating control, in particular to a heating control method and device based on a three-phase inversion power switch module.
Background
Automobile cab heating is an important function to ensure vehicle safety (defogging, defrosting, dehumidification), comfortable ride, and to improve battery performance.
At present, methods for generating heat by using a three-phase inverter power switch module and a motor winding in an electric driving system of an electric vehicle as a heat generating source exist in the field. The method can realize the heating function without adding extra hardware (such as PTC or HVH), thereby greatly reducing the cost.
However, when the three-phase inversion power switch module generates heat, the three-phase inversion power switch module far does not reach the maximum heating power when the motor winding reaches the maximum allowable heating value due to the limited current capacity of the motor winding. Therefore, how to generate as much heat as possible in the case of limited current flowing through the three-phase inverter power switch module is an urgent problem to be solved.
Disclosure of Invention
An object of the embodiments of the present application is to provide a heating control method and device based on a three-phase inverter power switch module, which can achieve the effect of efficient heating of a MOSFET body diode by controlling and adjusting dead time.
The embodiment of the application provides a heating control method based on a three-phase inversion power switch module in a first aspect, which comprises the following steps:
detecting half-bridge current of an inversion half bridge in the three-phase inversion switch module;
and adjusting the half-bridge dead time of the inverter half bridge based on the half-bridge current so as to correspondingly adjust the body diode heating power of the field effect tube in the three-phase inverter switch module.
In the implementation process, the method can increase the time for the current to flow through the body diode by increasing the switch dead zone, so as to increase the heating power of the body diode, and thus the heating power of the whole power module.
Further, the step of adjusting the half-bridge dead time of the inverting half-bridge based on the half-bridge current comprises:
calculating a minimum dead time of the inverting half-bridge based on the half-bridge current;
adjusting a half-bridge dead time of the inverting half-bridge based on the minimum dead time such that the half-bridge dead time is not less than the minimum dead time.
Further, the step of adjusting the half-bridge dead time of the inverter half-bridge based on the half-bridge current so that the body diode heating power of the fet in the three-phase inverter switch module is correspondingly adjusted includes:
calculating an upper dead time of the inverting half bridge based on the half bridge current;
and adjusting the half-bridge dead time of the inverter half bridge to be the upper limit dead time so as to maximize the body diode heating power of the field effect tube in the three-phase inverter switch module.
Further, the method further comprises:
determining the maximum heating power of the three-phase inversion power switch module;
judging whether the body diode heating power of a field effect tube in the three-phase inverter switch module is greater than the maximum heating power when the half-bridge dead time is the upper limit dead time;
when the body diode heating power of a field effect tube in the three-phase inverter switch module is larger than the maximum heating power, calculating the optimal dead time based on the maximum heating power;
and adjusting the half-bridge dead time to be the optimal dead time so as to optimize the body diode heating power of the field effect tube in the three-phase inverter switch module.
Further, three inverter half-bridges are arranged in the three-phase inverter switch module, wherein each inverter half-bridge comprises two field effect transistors.
The second aspect of the embodiments of the present application provides a heating control device based on a three-phase inverter power switch module, the heating control device based on the three-phase inverter power switch module includes:
the detection unit is used for detecting the half-bridge current of an inversion half bridge in the three-phase inversion switch module;
and the adjusting unit is used for adjusting the half-bridge dead time of the inverter half bridge based on the half-bridge current so as to correspondingly adjust the body diode heating power of the field effect tube in the three-phase inverter switch module.
In the implementation process, the device can increase the time for current to flow through the body diode by increasing the switch dead zone, so that the heating power of the body diode is increased, and the heating power of the whole power module is increased.
Further, the adjusting unit includes:
a calculation subunit for calculating a minimum dead time of the inverting half-bridge based on the half-bridge current;
and the adjusting subunit is used for adjusting the half-bridge dead time of the inverting half bridge based on the minimum dead time so as to enable the half-bridge dead time not to be smaller than the minimum dead time.
Further, the adjusting unit includes:
a calculating subunit, configured to calculate an upper dead time of the inverting half bridge based on the half bridge current;
and the adjusting subunit is used for adjusting the half-bridge dead time of the inverter half bridge to be the upper limit dead time so as to maximize the body diode heating power of the field effect tube in the three-phase inverter switch module.
Further, the adjusting unit further includes:
the determining subunit is used for determining the maximum heating power of the three-phase inversion power switch module;
the judging subunit is used for judging whether the body diode heating power of the field effect tube in the three-phase inverter switch module is greater than the maximum heating power when the half-bridge dead time is the upper limit dead time;
the calculating subunit is further configured to calculate an optimal dead time based on the maximum heating power when the body diode heating power of the field effect transistor in the three-phase inverter switch module is greater than the maximum heating power;
the adjusting subunit is further configured to adjust the half-bridge dead-time to be the optimal dead-time, so that the body diode heating power of the field effect transistor in the three-phase inverter switch module is optimal.
Furthermore, three inverter half bridges are arranged in the three-phase inverter switch module, wherein each inverter half bridge comprises two field effect transistors.
A third aspect of the embodiments of the present application provides an electronic device, including a memory and a processor, where the memory is used to store a computer program, and the processor runs the computer program to make the electronic device execute the heating control method based on a three-phase inverter power switch module according to any one of the first aspect of the embodiments of the present application.
A fourth aspect of the embodiments of the present application provides a computer-readable storage medium, which stores computer program instructions, where the computer program instructions, when read and executed by a processor, perform the heating control method based on a three-phase inverter power switch module according to any one of the first aspect of the embodiments of the present application.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments of the present application will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.
Fig. 1 is a schematic flowchart of a heating control method based on a three-phase inverter power switch module according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of a heating control device based on a three-phase inverter power switch module according to an embodiment of the present application;
fig. 3 is a schematic circuit structure diagram of an electric driving system of an electric vehicle according to an embodiment of the present disclosure;
FIG. 4 is a diagram illustrating a dead time setting and half-bridge current relationship according to an embodiment of the present disclosure;
fig. 5 is a schematic diagram illustrating a relationship between a dead time setting and a half-bridge current according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Meanwhile, in the description of the present application, the terms "first", "second", and the like are used only for distinguishing the description, and are not construed as indicating or implying relative importance.
Example 1
Referring to fig. 1, fig. 1 is a schematic flow chart of a heating control method based on a three-phase inverter power switch module according to this embodiment. The heating control method based on the three-phase inversion power switch module comprises the following steps:
s101, detecting half-bridge current of an inverter half bridge in the three-phase inverter switch module.
In this embodiment, three inverter half-bridges are provided in the three-phase inverter switch module, where each inverter half-bridge includes two fets.
Referring to fig. 3, fig. 3 shows a schematic circuit diagram of an electric drive system of an electric vehicle, in which half-bridge switches and diodes are replaced with mosfets in the present application. That is, the present application replaces the corresponding switches and diodes with field effect transistors.
In this embodiment, the method may adjust the half-bridge dead time of the inverter half-bridge based on the half-bridge current and the current switch ripple.
And S102, calculating the minimum dead time of the inverter half bridge based on the half bridge current.
And S103, calculating the upper limit dead time of the inverter half bridge based on the half bridge current.
And S104, determining the maximum heating power of the three-phase inversion power switch module.
S105, judging whether the body diode heating power of a field effect tube in the three-phase inverter switch module is larger than the maximum heating power when the half-bridge dead time is the upper limit dead time, and if so, executing the steps S106-S107; if not, go to step S108.
And S106, calculating the optimal dead time based on the maximum heating power.
And S107, adjusting the half-bridge dead time to be the optimal dead time so as to optimize the body diode heating power of the field effect tube in the three-phase inverter switch module.
And S108, adjusting the half-bridge dead time to be the upper limit dead time so as to enable the body diode heating power of the field effect tube in the three-phase inverter switch module to be the maximum.
In this embodiment, the method is a method for realizing efficient heating by using a body diode of the MOSFET for a three-phase inverter power switch module using the MOSFET.
In the embodiment, the method increases the time for the current to flow through the body diode by increasing the switch dead zone, so as to increase the heating power of the body diode, thereby increasing the heating power of the whole power module.
In this embodiment, the three-phase inverter bridge is composed of three half-bridges, each of which includes two switches (e.g., Q1Q2 forming one half-bridge). Generally, when a three-phase inverter bridge works, switches of an upper switch and a lower switch meet a complementary relation, namely a lower pipe is immediately opened when an upper pipe is disconnected, an upper pipe is immediately opened when the lower pipe is disconnected, a short period of so-called dead time exists before one pipe is turned off and the other pipe is turned on, and the upper pipe and the lower pipe are both closed in the dead time, so that the condition that the conduction time of the two pipes is overlapped due to the error in the transition process of opening and closing the upper pipe and the lower pipe is avoided (in this case, a high-voltage direct-current bus can be directly short-circuited).
In this embodiment, during the dead time, the current of the half bridge can only flow through the diode, since both the upper and lower tubes are off.
In this embodiment, for the power semiconductor switch with the MOSFET structure, the anti-parallel diode is inherent, that is, one semiconductor MSOFET wafer itself includes both a "switch" and a diode connected in parallel with the switch, which is called a "body diode".
In this embodiment, when the "switching" portion inside the MOSFET is turned on, current is allowed to flow bidirectionally from the "switching" portion, rather than only flowing from the positive electrode (collector C) to the negative electrode (emitter E) of the IGBT even if the switch is turned on, as in the case of the power semiconductor switch of the IGBT structure. Since the MOSFET has a relatively small "on-off" internal resistance, the voltage drop generated at the same current is lower than that of the body diode, and therefore, as long as the switch is turned on, the current flows through the "on-off" portion regardless of the current flow direction. Therefore, even if the current of a certain switching tube flows from the source to the drain of the three-phase inverter bridge formed by normal MOSFETs, in order to reduce the loss, software still selects to turn on the switching tube, so that the current flows through the switching section, which is called a "synchronous rectification" technique in the industry. At the same time, the software will also minimize dead time, thereby avoiding current flow through the body diode as much as possible. It is therefore the conduction voltage drop of the body diode that is often chosen to be sacrificed when designing the MOSFET, and eventually the conduction voltage drop of the body diode will be significantly larger than the conduction voltage drop of the switching section. For example, under typical conditions, the conduction voltage drop of the body diode can reach about 3V, and the voltage drop of the switching part is only about 1V.
Therefore, when the loss of the MOSFET power switch tube is the target of the MOSFET power switch tube instead and the MOSFET power switch tube needs to actively generate heat, the dead time of the upper tube and the lower tube can be increased during control, and current can flow through the body diode as much as possible, so that the loss is increased as much as possible, and higher heating power is generated.
In this embodiment, when the current flowing through the half bridge is small, a small dead time is adopted; when the current through the half-bridge is large, a large dead time is used.
The dead zone is too large and causes significant current distortion when the current is small. The critical dead time of whether the dead zone causes current distortion is approximately related to the inverse proportion of the bus voltage Udc, the proportion of the motor inductance Lm and the proportion of the motor winding current Iph flowing through the half bridge, namely approximately satisfying the following relations:
the switching dead time can thus be designed as follows:
step1: respectively calculating initial dead time T for three inverter half bridges DT,0 ＝k L *abs(I ph )/U dc . Wherein k is L The dimension with inductance is an adjustable value, and can be set as a constant according to experimental actual measurement or a variable changing with requirements according to other requirements; i is ph Is the current flowing in the half bridge of each phase. abs is an absolute value function. U shape dc Is the dc bus voltage.
Step2: limiting the initial dead time obtained by calculation aiming at the three inverter half bridges to obtain the final dead time T DT ＝min(max(T DT,0 ,T DT,min ),T pwm ). Wherein, T DT,min Is the minimum dead time to ensure that the upper and lower tubes do not go straight through; t is pwm The switching period of the power switching tube is the period of the PWM modulation wave driving the power switching operation.
Referring to fig. 4, fig. 4 shows a dead time setting versus half bridge current.
In this embodiment, on the basis of the above steps, the three half-bridges adjust the coefficients k respectively L Therefore, the heating power of the power module is adjusted or limited to avoid the overheating of the module.
In the present embodiment, the coefficient k L The larger the dead time is, the larger the heating power is; otherwise, k L The smaller the dead time, the smaller the heating power.
In the present embodiment, k L Has a maximum value which ensures that no current distortion is caused by an excessively large dead zone.
Referring to fig. 5, fig. 5 shows a schematic diagram of dead time setting versus half bridge current.
In this embodiment, the execution subject of the method may be a computing device such as a computer and a server, and is not limited in this embodiment.
In this embodiment, the main body of the method may also be an intelligent device such as a smart phone and a tablet computer, which is not limited in this embodiment.
It can be seen that, by implementing the heating control method based on the three-phase inverter power switch module described in this embodiment, the time for the current to flow through the body diode can be increased by increasing the switch dead zone, so as to increase the heating power of the body diode, and thus increase the heating power of the whole power module.
Example 2
Referring to fig. 2, fig. 2 is a schematic structural diagram of a heating control device based on a three-phase inverter power switch module according to this embodiment. As shown in fig. 2, the heating control device based on the three-phase inverter power switch module includes:
the detection unit 210 is configured to detect a half-bridge current of an inverter half bridge in the three-phase inverter switch module;
and the adjusting unit 220 is configured to adjust a half-bridge dead time of the inverter half bridge based on the half-bridge current, so that the body diode heating power of the fet in the three-phase inverter switch module is correspondingly adjusted.
As an alternative embodiment, the adjusting unit 220 includes:
a calculation subunit 221, configured to calculate a minimum dead time of the inverter half bridge based on the half bridge current;
and an adjusting subunit 222, configured to adjust a half-bridge dead time of the inverting half-bridge based on the minimum dead time, so that the half-bridge dead time is not less than the minimum dead time.
As an alternative embodiment, the adjusting unit 220 includes:
a calculation subunit 221, configured to calculate an upper limit dead time of the inverter half bridge based on the half bridge current;
and the adjusting subunit 222 is configured to adjust a half-bridge dead time of the inverter half-bridge to an upper limit dead time, so as to maximize a body diode heating power of a field effect transistor in the three-phase inverter switch module.
As an optional implementation, the adjusting unit 220 further includes:
a determining subunit 223, configured to determine the maximum heating power of the three-phase inverter power switch module;
the judging subunit 224 is configured to judge whether the body diode heating power of the field effect transistor in the three-phase inverter switch module is greater than the maximum heating power when the half-bridge dead time is the upper limit dead time;
the calculating subunit 221, configured to calculate an optimal dead time based on the maximum heating power when the heating power of the body diode of the field effect transistor in the three-phase inverter switch module is greater than the maximum heating power;
the adjusting subunit 222 is further configured to adjust the half-bridge dead time to be an optimal dead time, so as to optimize the body diode heating power of the fet in the three-phase inverter switch module.
In this embodiment, three inverter half-bridges are provided in the three-phase inverter switch module, where each inverter half-bridge includes two fets.
In the embodiment of the present application, for the explanation of the heating control device based on the three-phase inverter power switch module, reference may be made to the description in embodiment 1, and details are not repeated in this embodiment.
It can be seen that, in the implementation of the heating control device based on the three-phase inverter power switch module described in this embodiment, the time for the current to flow through the body diode can be increased by increasing the switch dead zone, so as to increase the heating power of the body diode, and thus increase the heating power of the whole power module.
The embodiment of the application provides an electronic device, which comprises a memory and a processor, wherein the memory is used for storing a computer program, and the processor runs the computer program to enable the electronic device to execute the heating control method based on the three-phase inversion power switch module in the embodiment 1 of the application.
The embodiment of the present application provides a computer-readable storage medium, which stores computer program instructions, and when the computer program instructions are read and executed by a processor, the method for controlling heating based on a three-phase inverter power switch module in embodiment 1 of the present application is executed.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method can be implemented in other ways. The apparatus embodiments described above are merely illustrative, and for example, the flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods and computer program products according to various embodiments of the present application. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems that perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
In addition, functional modules in the embodiments of the present application may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.
The functions, if implemented in the form of software functional modules and sold or used as a stand-alone product, may be stored in a computer-readable storage medium. Based on such understanding, the technical solutions of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The above description is only an example of the present application and is not intended to limit the scope of the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
It should be noted that, in this document, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising one of 8230; \8230;" 8230; "does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.
Claims (10)
1. A heating control method based on a three-phase inversion power switch module is characterized by comprising the following steps:
detecting half-bridge current of an inversion half bridge in the three-phase inversion switch module;
and adjusting the half-bridge dead time of the inverter half bridge based on the half-bridge current so as to correspondingly adjust the body diode heating power of the field effect tube in the three-phase inverter switch module.
2. The three-phase inverter power switch module-based heating control method of claim 1, wherein the step of adjusting the half-bridge dead time of the inverter half-bridge based on the half-bridge current comprises:
calculating a minimum dead time of the inverting half-bridge based on the half-bridge current;
and adjusting the half-bridge dead time of the inverting half bridge based on the minimum dead time so that the half-bridge dead time is not less than the minimum dead time.
3. The method as claimed in claim 1, wherein the step of adjusting the half-bridge dead time of the inverter half-bridge based on the half-bridge current to adjust the heating power of the body diode of the fet in the three-phase inverter switch module accordingly comprises:
calculating an upper dead time of the inverting half bridge based on the half bridge current;
and adjusting the half-bridge dead time of the inverter half bridge to be the upper limit dead time so as to maximize the body diode heating power of the field effect tube in the three-phase inverter switch module.
4. The heating control method based on the three-phase inverter power switch module according to claim 3, further comprising:
determining the maximum heating power of the three-phase inversion power switch module;
judging whether the body diode heating power of a field effect tube in the three-phase inverter switch module is greater than the maximum heating power when the half-bridge dead time is the upper limit dead time;
when the body diode heating power of a field effect tube in the three-phase inverter switch module is larger than the maximum heating power, calculating the optimal dead time based on the maximum heating power;
and adjusting the half-bridge dead time to be the optimal dead time so as to optimize the heating power of a body diode of a field effect tube in the three-phase inverter switch module.
5. The method of claim 1, wherein the three-phase inverter switch module comprises three inverter half-bridges, and each inverter half-bridge comprises two fets.
6. A heating control device based on a three-phase inversion power switch module is characterized by comprising:
the detection unit is used for detecting the half-bridge current of an inversion half bridge in the three-phase inversion switch module;
and the adjusting unit is used for adjusting the half-bridge dead time of the inverter half bridge based on the half-bridge current so as to correspondingly adjust the body diode heating power of the field effect tube in the three-phase inverter switch module.
7. The heating control device based on the three-phase inverter power switch module as claimed in claim 6, wherein the adjusting unit comprises:
a calculation subunit, configured to calculate a minimum dead time of the inverting half-bridge based on the half-bridge current;
and the adjusting subunit is used for adjusting the half-bridge dead time of the inverting half bridge based on the minimum dead time so as to enable the half-bridge dead time not to be less than the minimum dead time.
8. The heating control device based on the three-phase inverter power switch module as claimed in claim 6, wherein the adjusting unit comprises:
a calculating subunit, configured to calculate an upper dead time of the inverting half bridge based on the half bridge current;
and the adjusting subunit is used for adjusting the half-bridge dead time of the inverter half bridge to be the upper limit dead time so as to maximize the body diode heating power of the field effect tube in the three-phase inverter switch module.
9. An electronic device, comprising a memory for storing a computer program and a processor for executing the computer program to cause the electronic device to perform the method of any of claims 1-5 for heating control based on a three-phase inverter power switch module.
10. A readable storage medium having stored therein computer program instructions which, when read and executed by a processor, perform the method of any of claims 1 to 5.
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| CN (1) | CN115534690A (en) |
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2022
- 2022-10-21 CN CN202211297366.0A patent/CN115534690A/en active Pending
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