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A motor control method and device
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A technology of motor control and field weakening control, which is applied in the direction of control devices, motor generator control, and control of electromechanical transmission devices. It can solve problems affecting driving safety and current oscillation of permanent magnet synchronous motors, so as to ensure driving safety and improve control. effect, the effect of weakening the current oscillation
Active Publication Date: 2019-03-15
BEIJING ELECTRIC VEHICLE
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[0005] The purpose of the present invention is to provide a motor control method and device to solve the problem of current oscillation in the deep field weakening control of permanent magnet synchronous motors in the prior art, which affects driving safety
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Embodiment 1
[0060] Such as figure 1 As shown, Embodiment 1 of the present invention provides a motor control method, including:
[0061] Step 11: Obtain the current speed of the motor, the actual current of the direct axis and the actual current of the quadrature axis;
[0062] Step 12: Obtain the corresponding direct-axis limited current and quadrature-axis limited current according to the current rotational speed;
[0063] Step 13: Carry out field-weakening control of the motor according to the direct-axis actual current, the quadrature-axis actual current, the direct-axis limited current and the quadrature-axis limited current.
[0064] The motor control method provided in Embodiment 1 of the present invention obtains the corresponding direct-axis limited current and quadrature-axis limited current according to the rotational speed of the motor, and then carries out field-weakening control on the motor, so that the operating point of the motor can be as far as possible in deep field-w...
Embodiment 2
[0121] Such as Figure 5 As shown, Embodiment 2 of the present invention provides a motor control device, including:
[0122]An acquisition module 51, configured to acquire the current rotational speed, direct-axis actual current and quadrature-axis actual current of the motor;
[0123] The first processing module 52 is configured to obtain the corresponding direct-axis limited current and quadrature-axis limited current according to the current rotational speed;
[0124] The control module 53 is configured to perform field weakening control of the motor according to the direct-axis actual current, the quadrature-axis actual current, the direct-axis limited current and the quadrature-axis limited current.
[0125] The motor control device provided in Embodiment 2 of the present invention obtains the corresponding direct-axis limited current and quadrature-axis limited current according to the rotational speed of the motor, and then performs field-weakening control on the moto...
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Abstract
The invention provides a motor control method and device. The motor control method comprises the following steps of: acquiring the current rotating speed, direct-axis actual current and quadrature-axis actual current of a motor; obtaining corresponding direct-axis limiting current and quadrature-axis limiting current according to the current rotating speed; carrying out weak-magnetic control of the motor is carried out according to the direct-axis actual current, the quadrature-axis actual current, the direct-axis limiting current and the quadrature-axis limiting current. The motor control method and device provided by the invention have the advantages that by adoption of the scheme, the corresponding direct-axis limiting current and quadrature-axis limiting current are obtained according to the rotating speed of the motor, and further the weak-magnetic control is carried out on the motor, so that the working point of the motor can move along a maximum torque-voltage ratio to a greatest extent in deep weak-magnetic control, current oscillation in the deep weak-magnetic control of the motor can be weakened, the control effect can be improved and the driving safety can be guaranteed.
Description
technical field [0001] The present invention relates to the field of motor technology, in particular to a motor control method and device. Background technique [0002] In the face of increasingly severe energy and environmental problems, energy-saving and new-energy vehicles are becoming research hotspots in various countries. The governments of major countries in the world have invested a lot of manpower and material resources in related research and development. Sustainable development and protection of the earth's environment on which human beings depend are of great significance. In my country, energy-saving and new energy vehicles have been highly valued by the government and industry, and have been designated as one of the strategic emerging industries. The development of energy-saving and new energy vehicles, especially pure electric vehicles with zero pollution and zero emissions, is not only of great significance to my country's energy security and environmental p...
Claims
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