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Current working point giving system and method for permanent magnet alternating-current motor

A permanent magnet motor and AC motor technology, which is applied in the direction of AC motor control, control system, control generator, etc., can solve the problem that the current operating point of the permanent magnet AC motor cannot be given, etc.

Active Publication Date: 2018-08-07
NEUSOFT REACH AUTOMOTIVE TECH SHANGHAI CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In view of this, the embodiment of the present application provides a system and method for specifying the current operating point of the permanent magnet AC motor to solve the technical problem that the current operating point of the permanent magnet AC motor cannot be effectively specified in the prior art

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  • Current working point giving system and method for permanent magnet alternating-current motor
  • Current working point giving system and method for permanent magnet alternating-current motor
  • Current working point giving system and method for permanent magnet alternating-current motor

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Embodiment Construction

[0117] In order to make the above objects, features and advantages of the present application more obvious and understandable, the embodiments of the present application will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0118] see figure 1 , which shows a schematic structural diagram of a current operating point setting system for a permanent magnet AC motor provided in an embodiment of the present application, as shown in figure 1 As shown, the system includes:

[0119] Pseudo-model feedback system for obtaining the current operating point i of the last control beat dRef (k-1), i qRef (k-1) and motor temperature T motor , according to the current operating point i of the previous control beat dRef (k-1),i qRef (k-1) and motor temperature T motor Determine the parameters of the permanent magnet motor and the estimated value of the output torque T FdbEst , permanent magnet motor parameters inclu...

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Abstract

The embodiments of the present invention disclose a current working point giving system and method for a permanent magnet alternating-current motor. The system comprises a pseudo model feedback system, a torque controller, a MTPA solution unit and a flux weakening working point switching unit; the pseudo model feedback system enables the current working point giving system for the permanent magnetalternating-current motor to be de-coupled from other control systems with the direct-axis current final given value and quadrature-axis current final given value of a previous control beat adopted as input, so that the bandwidth of the torque controller can be designed to be very high, and the feedback of the parameters and output torque estimated value of the permanent magnet motor can be realized; the torque controller can be used for achieving the fast and high-precision output of torques; the MTPA solution unit can be used for accurately calculating MTPA curves under different loads; andthe flux weakening working point switching unit can be used for achieving flux weakening control and MTPA control switching balance, a flux weakening control part can also be decoupled from the othercontrol systems, and therefore, flux weakening control response speed can be increased. With the system and method adopted, the current working point of the permanent magnet alternating-current motorcan be given quickly and effectively, and the full-working area control performance of the permanent magnet motor can be improved.

Description

technical field [0001] The present application relates to the field of motor control, in particular to a method and system for specifying a current operating point of a permanent magnet AC motor. Background technique [0002] Due to its saliency effect, the permanent magnet AC motor leads to the MTPA (Maximum TorquePerAmpere, maximum torque current ratio) control method that saves the most stator current. At the same time, because its back electromotive force is generated by the permanent magnet, it needs to weaken the magnetic field when the motor speed is at high speed. Control Method. The root of these methods is: in the rotating coordinate system of rotor orientation, under the constraints of minimum stator current or constant terminal voltage, the given value of direct-axis quadrature-axis current is obtained from the speed or torque demand, that is, the permanent magnet The setting of the current operating point of the AC motor. The accuracy, rapidity, and continuity...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/00H02P21/20H02P21/22H02P21/28H02P25/024
Inventor 由旭
Owner NEUSOFT REACH AUTOMOTIVE TECH SHANGHAI CO LTD
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