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Method for operating a brushless electric motor of a motor vehicle

An electric motor, brushless technology, applied in the direction of electric components, electromechanical devices, motor control, etc., can solve the problems of increased load and difficult control.

Active Publication Date: 2021-10-08
BROSE FAHRZEUGTEILE GMBH & CO KG HALLSTADT (DE)
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the asymmetrical structure, handling becomes difficult and asymmetrical currents are generated through the converter, which in turn leads to increased load

Method used

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  • Method for operating a brushless electric motor of a motor vehicle
  • Method for operating a brushless electric motor of a motor vehicle
  • Method for operating a brushless electric motor of a motor vehicle

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Embodiment Construction

[0044] figure 1A motor vehicle 2 with two front wheels 4 and two rear wheels 6 is shown schematically in simplified form. The at least two wheels 4 , 6 are driven by a main drive (not shown in detail), for example an internal combustion engine, an electric motor or a combination thereof. The motor vehicle 2 includes a coolant circuit 8 which is a component of the air conditioning system. The coolant circuit 8 is filled with a coolant 10 such as CO 2 , R1234yf or R134a. The coolant 10 is compressed by means of an electric coolant compressor (eKMV) 12 and fed to a fluid-technically downstream condenser 14 , which is charged with ambient air, resulting in a temperature drop of the coolant 10 . The pressure and thus the temperature of the coolant 10 is reduced by means of a downstream evaporator 16 which includes a further heat exchanger, not shown in detail, which is thermally coupled to the fan line of the air-conditioning system. The fan line transports the air that is dissi...

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PUM

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Abstract

The invention relates to a method (72) for operating a brushless electric motor (30) of a motor vehicle (2), in particular an electric coolant compressor (12), the brushless electric motor having two sections The sub-motors (64, 66) with n phases (A, B, C, U, V, W) respectively arranged in the formula, the method relies on the phases (A, B, C, U) of the electric motor (30) , V, W) corresponding to the number of converters (56) to run the electric motor. The first switching point (80) for the n phases (A, B, C) of one of the sub-motors (64) is determined according to the power requirement (76) and for the other sub-motor according to the power requirement (76) Second switching point (86) of n phases (U, V, W) of (66). The second switching point (86) is offset by the first phase angle (92), and the converter (56) is actuated as a function of the first switching point (80) and the second switching point (86). The first phase angle (92) is selected such that the resultant current (I) flowing through the inverter (56) is less than a first boundary value (96). Furthermore, the invention relates to an assembly (12) of a motor vehicle (2) having a brushless electric motor (30).

Description

technical field [0001] The invention relates to a method for operating a brushless electric motor of a motor vehicle. The electric motor is preferably an integral part of the electric coolant compressor. The invention also relates to a motor vehicle unit, such as an electric coolant compressor. Background technique [0002] Motor vehicles usually have an air-conditioning system, by means of which the temperature of the interior of the motor vehicle is regulated. In motor vehicles that are driven by means of electric motors, required energy stores, such as high-voltage batteries, are also dissipated. The air conditioning system has a coolant circuit comprising a coolant compressor, a condenser downstream of the coolant compressor, and an evaporator downstream of the condenser in fluid technology. A further heat exchanger is fluidly connected downstream of the evaporator and is in thermal contact with a possible energy cell of the high-voltage energy store or with a fan lin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M5/453H02K16/00
CPCH02K21/16H02M5/453H02K1/146H02K1/276H02K7/14H02K16/04H02P29/40B60H1/00428B60H1/3205H02K7/006
Inventor 汉斯-约阿希姆·施罗德阿克塞尔·施泰因斯霍恩阿尔明·迪茨
Owner BROSE FAHRZEUGTEILE GMBH & CO KG HALLSTADT (DE)
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