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Motor carrier frequency calibration system, method and device

A carrier frequency and technology to be calibrated, applied in the field of vehicles, can solve problems such as heavy measurement workload, time-consuming, and inaccurate simulation results, and achieve the effects of improving accuracy, simplifying working conditions, and improving calibration efficiency

Active Publication Date: 2020-07-10
CHONGQING JINKANG POWER NEW ENERGY CO LTD
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  • Abstract
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  • Application Information

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Problems solved by technology

The simulation method is to establish the simulation model of the motor and the controller, and to find the carrier frequency with the best system efficiency by virtually setting different carrier frequencies. The simulation method has a deviation between the simulation model and the actual system, resulting in inaccurate simulation results.
Manual measurement method, the measurement workload is heavy and time-consuming, which makes the efficiency of carrier frequency calibration low

Method used

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  • Motor carrier frequency calibration system, method and device
  • Motor carrier frequency calibration system, method and device
  • Motor carrier frequency calibration system, method and device

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Embodiment Construction

[0053] In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, and are not intended to limit the present application.

[0054] In one embodiment, such as figure 1 As shown, a motor carrier frequency calibration system is provided, figure 1 The dynamometer 11, computer equipment 12, noise detection device 13, power analysis device 14, motor controller 15 and power supply 16 included in the system are shown in , and the motor 10 to be calibrated is also shown in order to show the carrier frequency of the motor The connection relationship between the calibration system and the motor 10 to be calibrated.

[0055] Wherein, the dynamometer 11 can also be called a dynamometer stand, and is coaxi...

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Abstract

The invention relates to a motor carrier frequency calibration system, method and device. The system comprises a dynamometer, a computer device, a noise detection device and a power analysis device. The computer device is used for sending a carrier frequency value to the motor controller and sending a given rotating speed value to the dynamometer. The dynamometer is used for controlling the rotating speed of the to-be-calibrated motor according to the given rotating speed value and returning an actual torque value and an actual rotating speed value of the to-be-calibrated motor to the computerdevice. The noise detection device and the power analysis device are respectively used for acquiring and transmitting a motor noise value and an input power value to the computer device. The computerdevice is also used for determining a system efficiency value according to the actual torque value, the actual rotating speed value and the input power value, and calibrating a target carrier frequency value corresponding to the given rotating speed value according to the carrier frequency value and the motor noise value. By adopting the system, the calibration efficiency and the calibration result accuracy can be improved.

Description

technical field [0001] The present application relates to the technical field of vehicles, in particular to a motor carrier frequency calibration system, method and device. Background technique [0002] New energy vehicles have very high requirements on the efficiency of the drive system. The efficiency of the new energy vehicle electric drive system consists of two parts: motor efficiency and controller efficiency. In order to meet the needs of users, when the torque and speed generated by the motor are constant, the carrier frequency of PWM (Pulse width modulation, pulse width modulation) controlled by the motor has a great influence on the system efficiency. For the controller, the higher the PWM carrier frequency, the more switching times of the controller, the greater the switching loss, and the lower the efficiency of the controller; for the motor, the higher the PWM carrier frequency, the less the harmonic components of the three-phase AC , the smaller the harmonic ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/34G01H17/00G01R21/06
CPCG01R31/343G01H17/00G01R21/06
Inventor 郑易魏小华邹鹏飞秦鑫孙滔
Owner CHONGQING JINKANG POWER NEW ENERGY CO LTD
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