Powertrain, noise suppression method, and electric vehicle
AssigneeHuawei Digital Power Technologies Co., Ltd.
InventorsZhengyi Tang, Xueyu Mei, Bayaer Eerhemu, Jinhua Chen
Life of this patent
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Abstract
A drive motor and a retarder in a powertrain meet a condition that a harmonic order of the drive motor is the same as a quantity of gear teeth of an input shaft gear in the retarder such that a frequency of an electromagnetic noise harmonic generated by the drive motor is the same as a frequency of a noise harmonic generated by the retarder. When the drive motor and the retarder are coupled using a connection structure, a phase of the electromagnetic noise harmonic generated by the drive motor differs from a phase of the noise harmonic generated by the retarder by a set angle.
Claims20
A noise suppression method comprising:
- obtaining a first harmonic after a first noise harmonic of a drive motor offsets a second noise harmonic of a retarder, wherein a first frequency of the first noise harmonic is the same as a second frequency of the second noise harmonic, and wherein a first phase of the first noise harmonic differs from a second phase of the second noise harmonic by a set angle;
- calculating, based on the first harmonic, a second harmonic having a third frequency the same as that of the first harmonic and having a third phase reverse to that of the first harmonic;
- and
- sending, to the drive motor, a control instruction to enable the drive motor to generate the second harmonic to suppress the first harmonic.
A noise suppression apparatus comprising:
- at least one processor configured to:
- obtain a first harmonic after a first noise harmonic of a drive motor offsets a second noise harmonic of a retarder, wherein a first frequency of the first noise harmonic is the same as a second frequency of the second noise harmonic, and wherein a first phase of the first noise harmonic differs from a second phase of the second noise harmonic by a set angle;
- and
- calculate, based on the first harmonic, a second harmonic having a third frequency the same as that of the first harmonic and a third phase reverse to that of the first harmonic;
- and
- a transceiver coupled to the at least one processor and configured to send, to the drive motor, a control instruction to enable the drive motor to generate the second harmonic to suppress the first harmonic.
A computer program product comprising instructions that is stored on a non-transitory computer-readable storage medium and that, when executed by at least one processor, cause a noise suppression apparatus to:
- obtain a first harmonic after a first noise harmonic of a drive motor offsets a second noise harmonic of a retarder, wherein a first frequency of the first noise harmonic is the same as a second frequency of the second noise harmonic, and wherein a first phase of the first noise harmonic differs from a second phase of the second noise harmonic by a set angle;
- calculate, based on the first harmonic, a second harmonic having a third frequency the same as that of the first harmonic and a third phase reverse to that of the first harmonic;
- and
- send, to the drive motor, a control instruction to enable the drive motor to generate the second harmonic to suppress the first harmonic.
Dependencies are inferred from the claim text.