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Motor controller and method for field oriented control of electric motors

A technology of motor controller and electric motor, which is applied in the direction of motor control, motor generator control, electromechanical brake control, etc., and can solve problems such as slow execution

Active Publication Date: 2017-07-18
VTESCO TECH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this case, the computational complexity for the two methods is not negligible, whereby the calculations are performed relatively slowly relative to the speed of field-oriented control

Method used

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  • Motor controller and method for field oriented control of electric motors
  • Motor controller and method for field oriented control of electric motors
  • Motor controller and method for field oriented control of electric motors

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Experimental program
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Embodiment Construction

[0030] Unless otherwise indicated, in the following, the same elements and having the same effect are designated by the same reference numerals.

[0031] figure 1 Field oriented control according to prior art is shown. The control comprises a setpoint current value forming unit 1 . The latter receives a setpoint torque value T as an input signal and outputs a torque-forming setpoint current value I q and the set point current value I that forms the field d as an output signal. In the case of separately excited synchronous machines, the field-forming setpoint current value I is additionally used e . Torque-forming setpoint current value I q and the set point current value I that forms the field d This is passed on to the field-oriented control device 2, which controls the electric motor accordingly.

[0032] In this case, the setpoint current value forming unit 1 performs its calculations relatively slowly. Torque-forming setpoint current value I q and the set point c...

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Abstract

The present invention relates to a motor controller and method for field oriented control of an electric motor propelling a vehicle. The motor controller comprises a setpoint current value forming unit (1) designed to receive a setpoint torque value (T) as an input signal and to output a torque forming setpoint current value (Iq) and at least A field-forming setpoint current value (Id) is used as an output signal to control the electric motor based on field orientation. Exception recognition means (4) obtains the current set point torque value, the exception recognition means calculates a change based on the current set point torque value and an earlier set point torque value, and if said change This exception is identified when the absolute value of σ exceeds a pre-specified threshold. When the exceptional situation is identified, the motor controller is designed to adjust the torque forming rate based on the current setpoint torque value (T) by bypassing the setpoint current value forming unit (1) from the Set point current value.

Description

technical field [0001] The invention relates to a motor controller and a corresponding method for field-oriented control of an electric motor driving a vehicle. Background technique [0002] Drives for modern motor vehicles increasingly use electric machines as the sole drive or in conjunction with another type of drive (hybrid drive). Electric machines are usually actuated by means of power electronics, which include an inverter which takes a direct voltage from the on-board high-voltage battery of the motor vehicle and generates an alternating current. Such inverters are often controlled based on field orientation. Such control is also called vector control. It can be provided here that a space vector (for example a current vector) is moved which rotates together with the drive shaft of the electric machine. In other words, this transforms the phase currents used to actuate the electric machine into a coordinate system fixed relative to the rotor and co-rotating with th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P29/028H02P21/00
CPCH02P29/02H02P6/34Y02T10/72B60L15/20H02P7/28
Inventor T.鲍曼
Owner VTESCO TECH GMBH