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Method for controlling a three-phase electrical machine

A technology of vector and phase control, applied in general control strategy, control drive, control system, etc., can solve problems such as high cost, inability to control voltage amplitude, complicated practical operation, etc., and achieve the effect of extending the rotor speed range

Pending Publication Date: 2020-06-19
VALEO SIEMENS EAUTOMOTIVE FRANCES SAS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] This strategy has the disadvantage of not being able to control the magnitude of the voltage applied to the motor phases other than by controlling the direct input voltage to the inverter, which may make it too complex or costly to implement

Method used

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  • Method for controlling a three-phase electrical machine
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  • Method for controlling a three-phase electrical machine

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Embodiment Construction

[0050] In the following description, the present invention will be described by its application in electric or hybrid vehicles, although this does not limit the applicable scope of the present invention.

[0051] figure 2 An example of an electrical diagram of an electric driveline of a motor vehicle has been presented. The electric transmission system includes a high-voltage power battery 10 , an inverter 20 and a motor 30 .

[0052] The high-voltage power battery 10 is connected to the inverter 20 to realize the function of supplying energy to the motor 30 to make its rotor rotate, or collecting the provided energy from the motor, such as the vehicle braking process. The high voltage traction battery 10 typically provides a voltage between 100V and 900V, and preferably between 100V and 500V. Charging the high-voltage traction battery 10 with electrical energy can also be accomplished by connecting the high-voltage traction battery 10 to an external power supply network (e...

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Abstract

The purpose of the invention is a method for controlling a three-phase electrical machine 30 from an inverter 20. Each sector of the complex representation of the space vector modulation being subdivided into three subsectors, comprising a central subsector centred on the active vector, a first lateral subsector associated with the first zero-sequence vector, and a second lateral subsector, opposite the first lateral subsector relative to the central subsector, associated with the second zero-sequence vector, it comprises a step of control of the voltage at the terminals of each phase (U, V, W) of the electrical machine 30, measured relative to neutral, with the value defined by the control vector associated with the subsector in which the control vector is located.

Description

technical field [0001] The present invention relates to the technical field of controlling three-phase motors, more precisely, a system and method for controlling a three-phase motor from an inverter, especially for motor vehicles. [0002] The device of the invention especially provides an effective solution for the control of the inverter by dynamically switching its frequency, especially enabling the extension of the rotor speed range of the motor. Background technique [0003] As known in the art, an electric or hybrid vehicle includes an electric powertrain powered by a high-voltage power battery through a high-voltage on-board electrical network, and a number of auxiliary electrical devices powered by a low-voltage power battery through a low-voltage on-board electrical network. The high-voltage power battery realizes the function of providing energy to the electric drive system to enable the vehicle to be driven. More precisely, as is known in the art, an inverter is...

Claims

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Application Information

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IPC IPC(8): H02P27/12
CPCH02P27/12H02P2209/09H02M7/5395Y02B70/10Y02T10/72Y02T10/70Y02T10/92H02M1/0048H02M7/53876H02P27/06H02P23/0004B60L15/20B60L50/51B60L50/60B60L2210/40H02P21/22B60K6/26H02P27/085
Inventor 皮埃尔-亚历山大·肖夫内
Owner VALEO SIEMENS EAUTOMOTIVE FRANCES SAS