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Motor rotor temperature estimation method and device, vehicle and storage medium

A motor rotor and rotor technology, applied in vehicle energy storage, output power conversion devices, motors, etc., can solve problems such as high-temperature demagnetization of rotor magnetic steel, and achieve the effect of avoiding irreversible demagnetization

Pending Publication Date: 2022-03-25
GUANGZHOU XIAOPENG MOTORS TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the high-frequency current harmonics flowing through the motor windings, a large loss will be induced on the rotor, which makes the rotor magnetic steel have the risk of high temperature demagnetization

Method used

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  • Motor rotor temperature estimation method and device, vehicle and storage medium
  • Motor rotor temperature estimation method and device, vehicle and storage medium
  • Motor rotor temperature estimation method and device, vehicle and storage medium

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Embodiment Construction

[0029] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0030] In order to clearly illustrate the motor rotor temperature estimation method, estimation device, vehicle and storage medium in the embodiment of the present invention, the following combines figure 1 The schematic flow diagram of the motor rotor temperature estimation method shown is described. Such as figure 1 As shown, the motor rotor temperature estimation method of the embodiment of the present application includes the following steps:

[0031] S11: When the motor winding and the switching tube in the moto...

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Abstract

The invention discloses a motor rotor temperature estimation method and device, a vehicle and a storage medium. The method comprises the following steps: when a booster circuit is formed by a motor winding and a switch tube in a motor controller to carry out boosting work, obtaining an input voltage and an output voltage of the booster circuit, obtaining a ripple current of the motor winding, and obtaining a switching frequency of the switch tube; determining the inductance value of the motor winding according to the input voltage and the output voltage of the booster circuit, the ripple current of the motor winding and the switching frequency of the switching tube; and estimating the temperature of the motor rotor according to the inductance value of the motor winding so as to carry out rotor magnetic steel over-temperature protection according to the temperature of the motor rotor. According to the motor rotor temperature estimation method and device, the vehicle and the storage medium, the temperature of the motor rotor can be estimated in real time in the boosting working process, then rotor magnetic steel can be protected according to the temperature of the motor rotor, and irreversible demagnetization of the magnetic steel caused by high temperature is avoided.

Description

technical field [0001] The invention relates to the technical field of motor temperature control, in particular to a motor rotor temperature estimation method, an estimation device, a vehicle and a storage medium. Background technique [0002] In related technologies, in order to increase the charging speed of electric vehicles, an 800V high-voltage platform is gradually developed, that is, the vehicle battery voltage reaches more than 800V. However, the maximum voltage of most charging piles does not reach 800V. In order to charge the vehicle battery, in related technologies, the motor winding of the vehicle is used as an inductor, and the switch tube, diode and film capacitor of the motor controller are multiplexed to form a Boost boost circuit, so as to increase the voltage of the charging pile to charge the vehicle battery . Due to the high-frequency current harmonics flowing through the motor windings, a large loss will be induced on the rotor, which makes the rotor m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P29/66H02P29/032H02M3/155B60L53/24
CPCH02P29/662H02P29/032H02M3/155B60L53/24Y02T10/64Y02T10/70Y02T10/7072Y02T90/14
Inventor 徐鹏孔庆波
Owner GUANGZHOU XIAOPENG MOTORS TECH CO LTD
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