Method and device for controlling motor torque
A technology of motor torque and control method, applied in the direction of single motor speed/torque control, current controller, motor, etc., can solve the problem of low motor output efficiency, and achieve the effect of improving motor efficiency and reducing energy consumption
Active Publication Date: 2019-03-08
BEIJING HYUNDAI
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- Abstract
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Problems solved by technology
[0005] According to the technical problem solved by the solution provided by the embodiment of the present invention, the output efficiency of the motor in the continuous low torque area is low
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[0045] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described below are only used to illustrate and explain the present invention, and are not intended to limit the present invention.
[0046] figure 2 is a flow chart of a motor torque control method provided by an embodiment of the present invention, such as figure 2 shown, including:
[0047] Step S101: Obtain the target torque desired by the driver by analyzing the control command issued by the driver to control the electric vehicle motor current;
[0048] Step S102: Find the highest efficiency torque at the current motor speed according to the preset relationship table between the electric vehicle motor speed and the highest efficiency torque;
[0049] Step S103: Determine the motor torque output mode of the electric vehicle according to the target torque and the highest efficien...
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The invention discloses a method and device for controlling torque of a motor, and relates to the technical field of motors. The method comprises the steps of obtaining desired target torque of a driver by analyzing a control instruction, which is given by the driver, for controlling current of the motor of an electric vehicle; searching the highest efficiency torque of the current rotating speed of the motor according to a preset relational table of the rotating speed of the motor of the electric vehicle and the highest efficiency torque; determining the torque output mode of the motor of the electric vehicle according to the target torque and the highest efficiency torque of the current rotating speed of the motor; and carrying out corresponding control on the current of the motor of the electric vehicle according to the determining result of the torque output mode of the motor of the electric vehicle to output corresponding torque. According to the method and the device disclosed by the invention, improvement of the operation efficiency of the motor is achieved on the basis of not increasing the complexity of a system or not adding an additional component.
Description
technical field [0001] The invention relates to the technical field of motors, in particular to a method and device for controlling motor torque. Background technique [0002] At present, many motors use motor controllers and converters to indirectly control the output torque of the motor through the control of the motor current. It can realize the output of any torque at any speed within the range of motor output capability. [0003] Due to factors such as copper consumption, iron consumption, and mechanical loss of the motor, the efficiency of the motor will be reduced. The output efficiency of the motor is different under different speeds and output torques. Using the speed and torque as the horizontal and vertical coordinates, the motor efficiency distribution map can be drawn. Such as figure 1 shown. [0004] Motors of different qualities have different ranges of high-efficiency zones. The high-efficiency zone of most motors is in the medium-speed and medium-torque ...
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IPC IPC(8): H02P6/28H02P6/08B60L15/20
CPCB60L15/20H02P6/08Y02T10/64Y02T10/72
Inventor 王甲潘兴博张宇
Owner BEIJING HYUNDAI