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Method and device for thermal regulation of motor vehicle electric motors

A thermal regulation, vehicle technology, applied in machine/engine, engine cooling, measuring devices, etc., to solve problems such as overuse, excessive consumption of actuator energy, and inaccurate regulation.

Inactive Publication Date: 2017-08-11
PEZHO SITROEN AUTOMOBILS SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] But in fact, due to the uniqueness of the input parameters, the adjustment proved to be imprecise
This inaccuracy can lead to under- or over-use of the actuator, which results in a loss of motor power
Underuse of the actuator causes the motor to overheat, while its overuse causes excessive energy consumption and premature wear of the actuator as well as reduced aural comfort for the driver and any passengers

Method used

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  • Method and device for thermal regulation of motor vehicle electric motors
  • Method and device for thermal regulation of motor vehicle electric motors
  • Method and device for thermal regulation of motor vehicle electric motors

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Embodiment Construction

[0103] figure 1 An embodiment of a thermal regulation device 15 including an electrical machine 26 with electronics 22 and an electrical mechanism 24 is depicted in a schematic assembly view. In order to dissipate the thermal energy generated by the electric motor 26 to the outside, the device 15 includes a circuit through which a heat transfer fluid 20 flows, here the cooling liquid driven by the pump 34 . The circuit includes a heat exchanger 32 , here a radiator, arranged close to the electric machine 26 .

[0104] The pump 34 is actuated by an application program 58 in a program memory 52 of the computer 40 . The program memory 52 includes a measurement program 54 and a calculation program 56 . The computer 40 comprises a data memory 50 and a microprocessor 60 connected to an interface 53 and a program memory 52 via a CAN bus-type multiplex network. Accordingly, the microprocessor 60 is adapted to operate the computer assembly 40 .

[0105] The device also includes the...

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Abstract

The invention relates to a method (100) of thermal regulation of a vehicle electric motor, wherein a heat-carrying fluid is circulated (102) in a radiator close to the electric motor by means of a pump, the temperature (T°liq_mes) of said fluid is measured (108), by The fan blows (104) air to the exchanger, calculates (110) the air flow through the exchanger (Qair_cal), determines (101) the temperature (T°mot_dét) of the motor, based on the fluid temperature and Said air flow rate is calculated (109) for said fan's rotational speed nominal set point (VNRot_cons) and the flow rate set point (QNliq_cons) of the fluid output from said pump, based on said temperature of the motor, calculated (105 ) the rotational speed safety set point of the fan (VSrot_cons) and the flow rate safety set point of the pump (QSliq_cons), synthesize (160; 162) the nominal set point and the safety set point to obtain two resultant setpoints (VMAXrot_cons; QMAXliq_cons) to control (118) the fan by applying (120) the speed composite setpoint to the fan and by applying the flow composite setpoint to the pump ( 122) to operate (118) the pump.

Description

technical field [0001] The invention relates to a method and a device for thermal regulation of motor vehicle electric machines. The technical field of the invention is generally vehicle electric machines. The invention relates in particular to the thermal regulation of electric machines of motor vehicles. Background technique [0002] The temperature of an electric motor has a direct impact on its performance and availability. This is especially true for electric motors, whose electronic components and electrical mechanisms heat up due to the Joule effect when current is passed through them. In the state of the art, thermal regulation systems are used to cool such electric machines. Typically, heat carrier fluid or coolant is circulated to discharge heat energy generated by these electronic components and these electrical mechanisms to the outside of the vehicle. [0003] In the prior art, the teaching of document US4475485 is known in particular, which discloses a devi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01P7/04F01P7/10F01P7/16
CPCF01P7/04F01P7/10F01P7/164F01P2025/46F01P2025/50
Inventor D·赞帕鲁蒂T·迈达尼
Owner PEZHO SITROEN AUTOMOBILS SA
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