CN115347845B - High-speed motor carrier frequency modulation method - Google Patents
High-speed motor carrier frequency modulation method Download PDFInfo
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- CN115347845B CN115347845B CN202211264202.8A CN202211264202A CN115347845B CN 115347845 B CN115347845 B CN 115347845B CN 202211264202 A CN202211264202 A CN 202211264202A CN 115347845 B CN115347845 B CN 115347845B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
- H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0048—Circuits or arrangements for reducing losses
- H02M1/0054—Transistor switching losses
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/44—Circuits or arrangements for compensating for electromagnetic interference in converters or inverters
Abstract
The invention relates to the technical field of motor carrier frequency, and particularly discloses a high-speed motor carrier frequency modulation method, which comprises the following steps: after being electrified, all parameters enter an initialization state; the micro control unit acquires the initial rotating speed of the motor through bus communication; and calculating a switching frequency reference value, a switching frequency maximum limit value and a switching frequency minimum limit value corresponding to each rotating speed according to the acquired initial rotating speed of the motor. The carrier frequency of the invention calculates the switching frequency reference value, the switching frequency maximum limit value and the switching frequency minimum limit value corresponding to each rotating speed according to the acquired initial rotating speed of the motor, the motor performs phase shifting by a phase shifting method for changing the bandwidth of the switching frequency in a dynamic frequency modulation and reciprocating frequency modulation mode in the operation process, the amplitude of the bottom harmonic noise is changed along with the phase shifting method, and the phase shifting method is one of forward bias, reverse bias or symmetrical change phase shifting methods, thereby reducing the electromagnetic interference and reducing or eliminating the dependence on a common mode filter and an output filter.
Description
Technical Field
The invention belongs to the technical field of motor carrier frequency, and particularly relates to a high-speed motor carrier frequency modulation method.
Background
Along with the increase of the intelligent degree, the problems of electromagnetic compatibility between motors and electronic components of new energy vehicles are increasingly severe, the components reach the electromagnetic compatibility Class 3 level and become the admission requirements of mainstream new energy vehicle manufacturers, but at present, part of the components are difficult to meet the requirements of the electromagnetic compatibility Class 3 level, especially the electrical components with high voltage, high power density and high frequency, such as a controller of a hydrogen fuel cell air compressor. At present, most of controllers of fuel cell air compressors adopt a two-level SiC electrical topology technical scheme, the defects of fixed switching frequency, high harmonic content and difficulty in electromagnetic radiation suppression exist, the requirements of electromagnetic compatibility Class 3 grades are difficult to meet, meanwhile, the idling region efficiency is low, and further improvement cannot be achieved. In order to improve the electromagnetic compatibility, the controller product based on the prior art is usually increased in size and weight by means of adding an input filter, an output filter, a package shield and the like, so that the requirements of light weight and small size of the whole vehicle are difficult to achieve. Therefore, it is urgently needed to invent a high-speed motor carrier frequency modulation method.
Disclosure of Invention
The invention aims to provide a high-speed motor carrier frequency modulation method to solve the problems.
In order to solve the technical problem, the invention provides a high-speed motor carrier frequency modulation method, which comprises the following steps:
s1, all parameters enter an initialization state after power-on;
s2, the micro control unit obtains the initial rotating speed of the motor through bus communication;
s3, the micro control unit calculates a switching frequency reference value, a switching frequency highest limit value and a switching frequency lowest limit value corresponding to each rotating speed according to the acquired initial rotating speed of the motor, and the calculation formulas of the switching frequency reference value, the switching frequency highest limit value and the switching frequency lowest limit value are
，
In the formula (I), the compound is shown in the specification,
for the switching frequency to be output per second,
different preset proportionality constants for respectively calculating a switching frequency reference value, a switching frequency maximum limit value and a switching frequency minimum limit value;
in order to be the electrical frequency of the electric wave,
is the rotation speed;
the number of pole pairs of the motor is;
s4, the micro control unit receives a rotating speed instruction transmitted by bus communication, adjusts parameters of the PWM module, adjusts the rotating speed, and simultaneously, the PWM module performs phase shifting through a phase shifting method for changing the switching frequency bandwidth through dynamic frequency modulation, and the amplitude of the harmonic noise at the bottom is changed;
s5, judging whether the movement of the switching frequency reaches a limited period or not by the micro control unit, loading the switching frequency after the dynamic frequency modulation in the step S4 when the movement of the switching frequency reaches the limited period, and maintaining the dynamic frequency modulation state in the step S4 when the movement of the switching frequency does not reach the limited period;
and S6, after the loading is finished, the micro control unit receives a stop instruction, the motor runs, the switching frequency changes but the stop instruction is not received, and the switching frequency corresponding to each rotating speed of the motor is calculated.
Further, the phase shift method in S4 is one of a forward bias phase shift method, a reverse bias phase shift method, or a symmetrical variation phase shift method.
Further, the adjustment modes of the rotation speed and the switching frequency in S4 are the same, and are both one of linear dynamic adjustment or dynamic step adjustment.
Further, the forward bias phase shifting method is that the micro control unit receives a rotating speed instruction transmitted by bus communication, module parameters are adjusted, the rotating speed is adjusted accordingly, when a switching frequency reference value is smaller than one-half of the sum of a switching frequency highest limit value and a switching frequency lowest limit value, the PWM module shifts a pulse waveform to the right in a frequency modulation mode, the switching frequency changes between the switching frequency highest limit value and the switching frequency lowest limit value, the bandwidth of the switching frequency is increased, the amplitude of bottom harmonic noise is reduced accordingly, the bottom harmonic noise is increased due to the overlapping of the switching frequency bandwidths, the amplitude of the bottom harmonic noise is reduced, and the EMI is reduced accordingly.
Furthermore, the reverse bias phase shifting method is characterized in that the micro control unit receives a rotating speed instruction transmitted by bus communication, module parameters are adjusted, the rotating speed is adjusted accordingly, when a switching frequency reference value is larger than one-half of the sum of the highest limit value of the switching frequency and the lowest limit value of the switching frequency, the PWM module shifts a pulse waveform to the left in a frequency modulation mode, the switching frequency changes between the highest limit value of the switching frequency and the lowest limit value of the switching frequency, the bandwidth of the switching frequency is increased, the amplitude of the bottom harmonic noise is reduced accordingly, the bottom harmonic noise is increased due to the overlapping of the bandwidth of the switching frequency, the amplitude of the bottom harmonic noise is reduced accordingly, and the EMI is reduced accordingly.
Further, the symmetrical variable phase shifting method is characterized in that the micro control unit receives a rotating speed instruction transmitted by bus communication, module parameters are adjusted, the rotating speed is adjusted accordingly, when a switching frequency reference value is equal to one half of the sum of a switching frequency maximum limit value and a switching frequency minimum limit value, the PWM module symmetrically shifts a pulse waveform to the left direction and the right direction in a frequency modulation mode, the switching frequency is changed between the switching frequency maximum limit value and the switching frequency minimum limit value, the switching frequency bandwidth is increased, the amplitude of the bottom harmonic noise is reduced accordingly, the amplitude of the bottom harmonic noise is increased due to the superposition of the switching frequency bandwidth, the amplitude of the bottom harmonic noise is reduced, and the EMI is reduced accordingly.
Further, the switching frequency is changed between the highest limit value and the lowest limit value of the switching frequency in a reciprocating or dynamic manner.
The invention has the advantages that the carrier frequency calculates the switching frequency reference value, the switching frequency maximum limit value and the switching frequency minimum limit value corresponding to each rotating speed according to the acquired initial rotating speed of the motor, the motor carries out phase shift by a phase shift method for changing the bandwidth of the switching frequency in a dynamic frequency modulation and reciprocating frequency modulation mode in the operation process, the amplitude of the bottom harmonic noise is changed, and the phase shift method adopts one of a forward bias phase shift method, a reverse bias phase shift method or a symmetrical change phase shift method, thereby reducing the electromagnetic interference, reducing or eliminating the dependence on a common mode filter and an output filter, reducing the manufacturing cost and simultaneously reducing the switching loss in an idle speed area in a dynamic frequency modulation mode or a reciprocating frequency modulation mode.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings needed for the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic diagram of the rotation speed and switching frequency of a carrier frequency modulation method of a high-speed motor;
FIG. 2 is a schematic diagram of switching noise harmonic reduction for a high speed motor carrier frequency modulation method;
fig. 3 is a process flow chart of a high-speed motor carrier frequency modulation method.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the specification of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In an embodiment of the present invention, as shown in fig. 1 to fig. 3, a method for modulating carrier frequency of a high-speed motor is specifically disclosed, and the method comprises the following steps:
s1, all parameters enter an initialization state after power-on;
s2, the micro control unit obtains the initial rotating speed of the motor through bus communication;
s3, the micro control unit calculates a switching frequency reference value, a switching frequency highest limit value and a switching frequency lowest limit value corresponding to each rotating speed according to the acquired initial rotating speed of the motor;
s4, the micro control unit receives a rotating speed instruction transmitted by bus communication, adjusts parameters of the PWM module, adjusts the rotating speed, and simultaneously, the PWM module performs phase shifting through a phase shifting method for changing the switching frequency bandwidth through dynamic frequency modulation, the amplitude of the harmonic noise at the bottom is changed along with the adjustment, and the phase shifting method is one of a forward bias phase shifting method, a reverse bias phase shifting method or a symmetrical change phase shifting method;
the adjustment modes of the rotating speed and the switching frequency are the same and are one of linear dynamic adjustment or dynamic step adjustment;
the PWM module is a module for modulating pulse width in the micro control unit;
s5, judging whether the movement of the switching frequency reaches a limited period or not by the micro control unit, loading the switching frequency after the dynamic frequency modulation in the step S4 when the movement of the switching frequency reaches the limited period, and maintaining the dynamic frequency modulation state in the step S4 when the movement of the switching frequency does not reach the limited period;
and S6, after the loading is finished, the micro control unit receives a stop instruction, the motor runs, the switching frequency changes but the stop instruction is not received, and the switching frequency corresponding to each rotating speed of the motor is calculated.
The forward bias phase shifting method is characterized in that a micro control unit receives a rotating speed instruction transmitted by bus communication, module parameters are adjusted, the rotating speed is adjusted accordingly, when a switching frequency reference value is smaller than one-half of the sum of a switching frequency maximum limit value and a switching frequency minimum limit value, a PWM (pulse width modulation) module shifts a pulse waveform to the right in a frequency modulation mode, the switching frequency changes between the switching frequency maximum limit value and the switching frequency minimum limit value, the bandwidth of the switching frequency is increased, the amplitude of bottom harmonic noise is reduced accordingly, the bottom harmonic noise is increased due to the overlapping of the switching frequency bandwidths, the amplitude of the bottom harmonic noise is reduced accordingly, EMI is reduced accordingly, and the EMI is electromagnetic interference which is abbreviated as EMI in the whole text.
The reverse bias phase shifting method is characterized in that a micro control unit receives a rotating speed instruction transmitted by bus communication, module parameters are adjusted, the rotating speed is adjusted accordingly, when a switching frequency reference value is larger than one-half of the sum of a switching frequency maximum limit value and a switching frequency minimum limit value, a PWM (pulse width modulation) module deflects a pulse waveform to the left in a frequency modulation mode, the switching frequency changes between the switching frequency maximum limit value and the switching frequency minimum limit value, the switching frequency bandwidth is increased, the amplitude of bottom harmonic noise is reduced accordingly, the bottom harmonic noise is increased due to the superposition of the switching frequency bandwidth, the amplitude of the bottom harmonic noise is reduced, and EMI (electro-magnetic interference) is reduced accordingly.
The symmetrical variable phase shifting method is characterized in that a micro control unit receives a rotating speed instruction transmitted by bus communication, module parameters are adjusted, the rotating speed is adjusted accordingly, when a switching frequency reference value is equal to one half of the sum of a switching frequency maximum limit value and a switching frequency minimum limit value, a PWM (pulse width modulation) module symmetrically shifts a pulse waveform to the left direction and the right direction in a frequency modulation mode, the switching frequency is changed between the switching frequency maximum limit value and the switching frequency minimum limit value, the switching frequency bandwidth is increased, the amplitude of bottom harmonic noise is reduced accordingly, the bottom harmonic noise is increased due to the overlapping of the switching frequency bandwidth, the amplitude of the bottom harmonic noise is reduced, and the EMI (electro-magnetic interference) is reduced accordingly.
The switching frequency is changed between the highest limit value and the lowest limit value of the switching frequency in a reciprocating or dynamic manner.
The calculation formula of the switching frequency, the highest limit value of the switching frequency and the lowest limit value of the switching frequency in the S3 is
,
In the formula (I), the compound is shown in the specification,
is the switching frequency output per second and is,
different preset proportionality constants are respectively calculated when a switching frequency reference value, a switching frequency maximum limit value and a switching frequency minimum limit value are calculated;
in order to be the electrical frequency of the electric wave,
is the rotation speed;
the number of pole pairs of the motor is shown.
Example 1:
in FIG. 1, the horizontal axis represents the motor rotation speed, and the vertical axis represents the switching frequency, in FIG. 1, the upper and lowerThe arrow is the state of the reciprocating change of the switching frequency, and the micro control unit passes
The formula calculates a switching frequency reference value, a switching frequency highest limit value and a switching frequency lowest limit value which are output by the carrier frequency and each rotating speed of the motor per second, and a switching frequency reference line is formed among the switching frequency reference values; the highest limit line of the switching frequency is formed between the highest limit values of the switching frequency, the lowest limit line of the switching frequency is formed between the lowest limit values of the switching frequency,
the number of pole pairs of the motor is preferably 1, and a proportionality constant is calculated for the maximum limit value of the switching frequency corresponding to each rotation speed of the maximum limit line of the switching frequency
Is 50; proportionality constant for calculating switching frequency minimum limit value corresponding to each rotation speed of switching frequency minimum limit line
Is 20; proportionality constant for calculating switching frequency reference value corresponding to each rotation speed of switching frequency reference line
Is a number of 30, and is,
when the difference between the switching frequency reference line and the switching frequency highest limit line is larger than the difference between the switching frequency reference line and the switching frequency lowest limit line, the PWM module shifts the pulse waveform to the right in a dynamic frequency modulation mode to enable the switching frequency to change back and forth between the switching frequency highest limit value and the switching frequency lowest limit value, so that the bandwidth of the switching frequency is increased, the amplitude of harmonic noise is reduced, the amplitude of bottom harmonic noise is increased due to the superposition of the switching frequency bandwidth, the amplitude of the bottom harmonic noise is reduced, and the EMI is reduced;
when the fall between the switching frequency reference line and the switching frequency highest limiting line is smaller than the fall between the switching frequency reference line and the switching frequency lowest limiting line, the PWM module deflects the pulse waveform leftwards in a dynamic frequency modulation mode to enable the switching frequency to change back and forth between the switching frequency highest limiting value and the switching frequency lowest limiting value, so that the bandwidth of the switching frequency is increased, the amplitude of harmonic noise is reduced, the bottom harmonic noise is increased due to the overlapping of the switching frequency bandwidths, the amplitude of the bottom harmonic noise is reduced, and the EMI is reduced;
when the difference between the switching frequency reference line and the switching frequency highest limit line is equal to the difference between the switching frequency reference line and the switching frequency lowest limit line, the PWM module shifts the pulse waveform to the left and right sides in a dynamic frequency modulation mode to enable the switching frequency to change back and forth between the switching frequency highest limit value and the switching frequency lowest limit value, so that the bandwidth of the switching frequency is increased, the amplitude of harmonic noise is reduced accordingly, the amplitude of bottom harmonic noise is increased due to the superposition of the switching frequency bandwidth, the amplitude of the bottom harmonic noise is reduced accordingly, and the EMI is reduced accordingly;
when the motor runs for one electric cycle or a plurality of electric cycles, the micro control unit judges the movement of the switching frequency, when the limited electric cycle or a plurality of electric cycles is reached, the frequency-modulated rotating speed switching frequency is loaded, after the loading is finished, the micro control unit receives a shutdown instruction, the motor runs, the switching frequency changes but the shutdown instruction is not received, and then the calculation of the switching frequency corresponding to each rotating speed of the motor is returned; and when the limited electric period or a plurality of electric periods is not reached, the original rotating speed switching frequency is maintained.
In FIG. 2, the X-axis represents the switching frequency corresponding to the harmonic wave, and the Y-axis represents the amplitude corresponding to the harmonic wave; the waveform 2 is harmonic distribution obtained by phase-shifting the harmonic by a forward bias phase-shifting method by adopting a PWM module, so that the switching frequency bandwidth is widened, the bottom harmonic noise is increased, but the amplitude of the harmonic is greatly reduced, and the EMI (electro-magnetic interference) is reduced.
The invention can be applied to a two-level or three-level circuit topology with silicon carbide power devices to control the motor speed and the switching frequency bandwidth, thereby reducing the switching noise and electromagnetic interference.
The total loss of the power device is composed of switching loss and conduction loss, the load current is less in a low-speed area, the conduction loss is lower, the ratio of the total loss of the power device in the low-speed area is increased due to the fact that useful switching power in fixed switching frequency is lower, and the low quick-acting rate is reduced accordingly. The switching loss can be represented by the following equation:
in the formula
Is a switching loss;
turn-on loss for the device;
turn-on loss for the device;
is the switching frequency; the switching loss is related to the switching frequency according to a formula, the switching frequency is increased along with the increase of the rotating speed of the motor and is reduced along with the reduction of the rotating speed of the motor, and the switching frequency is changed linearly, so that the occupation ratio of the switching loss in a low-speed area of the motor is reduced, and the output efficiency of the low-speed area of the motor is improved.
The process flow of the invention is as follows: all parameters in the micro control unit enter an initialization state, the initial rotating speed of the motor is obtained through bus communication after the initialization is finished, the switching frequency reference value, the highest limit value of the switching frequency and the lowest limit value of the switching frequency corresponding to each rotating speed of the motor are calculated after the obtained initial rotating speed of the motor is received, the micro control unit receives a rotating speed instruction transmitted through bus communication, parameters of the PWM module are adjusted, the rotating speed is adjusted accordingly, the PWM module carries out phase shifting through a phase shifting method of changing the bandwidth of the switching frequency through dynamic frequency modulation, the amplitude of bottom harmonic noise is changed accordingly, dynamic frequency modulation is achieved, switching loss in an idling area is reduced, the switching frequency changes in a dynamic carrier frequency mode or in a reciprocating carrier frequency mode between the highest limit value of the switching frequency and the lowest limit value of the switching frequency, and therefore electromagnetic interference capacity is reduced.
The above disclosure is only one preferred embodiment of the present invention, and certainly should not be construed as limiting the scope of the invention, which is defined by the claims and their equivalents.
Claims (5)
1. A high-speed motor carrier frequency modulation method is characterized by comprising the following steps:
s1, all parameters enter an initialization state after power-on;
s2, the micro control unit obtains the initial rotating speed of the motor through bus communication;
s3, the micro control unit calculates a switching frequency reference value, a switching frequency maximum limit value and a switching frequency minimum limit value corresponding to the rotating speed of the motor, and the calculation formulas of the switching frequency reference value, the switching frequency maximum limit value and the switching frequency minimum limit value are
，
In the formula (I), the compound is shown in the specification,
for the switching frequency to be output per second,
different preset proportionality constants are respectively calculated when a switching frequency reference value, a switching frequency maximum limit value and a switching frequency minimum limit value are calculated;
is an electricityThe frequency of the radio frequency is set to be,
the motor rotating speed;
the number of pole pairs of the motor is;
s4, the micro control unit receives a rotating speed instruction transmitted by bus communication, adjusts parameters of the PWM module, adjusts the rotating speed accordingly, the adjusting modes of the rotating speed and the switching frequency are the same and are one of linear dynamic adjustment or dynamic step adjustment, meanwhile, the PWM module carries out forward bias phase shift or reverse bias phase shift or symmetrical change phase shift on a pulse waveform generated after the dynamic frequency modulation, the switching frequency changes between the highest limit value and the lowest limit value of the switching frequency, the bandwidth of the switching frequency changes, and the amplitude of bottom harmonic noise also changes accordingly;
s5, judging whether the movement of the switching frequency reaches a limited period or not by the micro control unit, loading the switching frequency after the dynamic frequency modulation in the step S4 when the movement of the switching frequency reaches the limited period, and maintaining the dynamic frequency modulation state in the step S4 when the movement of the switching frequency does not reach the limited period;
and S6, after the loading is finished, the micro control unit receives a stop instruction, the motor runs, the switching frequency changes but the stop instruction is not received, and the switching frequency corresponding to each rotating speed of the motor is calculated.
2. The carrier frequency modulation method of a high-speed motor according to claim 1, wherein the forward offset phase shifting specifically comprises: when the reference value of the switching frequency is less than one half of the sum of the maximum limit value and the minimum limit value of the switching frequency, the PWM module shifts the pulse waveform to the right in a frequency modulation mode, the switching frequency changes between the maximum limit value and the minimum limit value of the switching frequency, the bandwidth of the switching frequency is increased, the amplitude of the bottom harmonic noise is reduced, the amplitude of the bottom harmonic noise is increased due to the superposition of the bandwidth of the switching frequency, the amplitude of the bottom harmonic noise is reduced, and the EMI is reduced.
3. The carrier frequency modulation method of a high-speed motor according to claim 1, wherein the reverse bias phase shifting specifically comprises: when the reference value of the switching frequency is greater than one half of the sum of the maximum limit value and the minimum limit value of the switching frequency, the PWM module shifts the pulse waveform to the left in a frequency modulation mode, the switching frequency changes between the maximum limit value and the minimum limit value of the switching frequency, the bandwidth of the switching frequency is increased, the amplitude of the bottom harmonic noise is reduced, the amplitude of the bottom harmonic noise is increased due to the superposition of the bandwidth of the switching frequency, the amplitude of the bottom harmonic noise is reduced, and the EMI is reduced.
4. The carrier frequency modulation method of a high-speed motor according to claim 1, wherein the symmetrically varying phase shift specifically comprises: when the reference value of the switching frequency is equal to one half of the sum of the maximum limit value and the minimum limit value of the switching frequency, the PWM module symmetrically shifts the pulse waveform to the left and right directions in a frequency modulation mode, the switching frequency is changed between the maximum limit value and the minimum limit value of the switching frequency, the bandwidth of the switching frequency is increased, the amplitude of the bottom harmonic noise is reduced, the bottom harmonic noise is increased due to the superposition of the bandwidth of the switching frequency, the amplitude of the bottom harmonic noise is reduced, and the EMI is also reduced.
5. A high-speed motor carrier frequency modulation method according to claim 2, 3 or 4, characterized in that the change mode of the switching frequency between the switching frequency maximum limit value and the switching frequency minimum limit value is a reciprocating change or a dynamic change.
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| CN1841899A (en) * | 2005-04-01 | 2006-10-04 | 株式会社电装 | Switching device and related operating method |
| CN106972799A (en) * | 2017-04-05 | 2017-07-21 | 西北工业大学 | A kind of magneto control parameter computational methods based on change switching frequency |
| CN112398399A (en) * | 2020-12-09 | 2021-02-23 | 中国船舶工业系统工程研究院 | Active suppression method for vibration noise of permanent magnet synchronous motor |
| JP2021052442A (en) * | 2019-09-20 | 2021-04-01 | 日立Astemo株式会社 | Inverter controller |
| CN112994537A (en) * | 2021-04-15 | 2021-06-18 | 常州易控汽车电子股份有限公司 | Permanent magnet synchronous motor frequency conversion control method |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1841899A (en) * | 2005-04-01 | 2006-10-04 | 株式会社电装 | Switching device and related operating method |
| CN106972799A (en) * | 2017-04-05 | 2017-07-21 | 西北工业大学 | A kind of magneto control parameter computational methods based on change switching frequency |
| JP2021052442A (en) * | 2019-09-20 | 2021-04-01 | 日立Astemo株式会社 | Inverter controller |
| CN112398399A (en) * | 2020-12-09 | 2021-02-23 | 中国船舶工业系统工程研究院 | Active suppression method for vibration noise of permanent magnet synchronous motor |
| CN112994537A (en) * | 2021-04-15 | 2021-06-18 | 常州易控汽车电子股份有限公司 | Permanent magnet synchronous motor frequency conversion control method |
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