Method for correcting phase sequence of power line of permanent magnet synchronous motor driver of electric car

A technology of permanent magnet synchronous motor and correction method, which is applied in the direction of motor generator control, control of electromechanical brakes, electronic commutation motor control, etc. Achieve the effect of avoiding burning accidents, reducing line connection and phase sequence testing, and improving the efficiency of R&D and maintenance work

Active Publication Date: 2014-07-23
中国东方电气集团有限公司
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Problems solved by technology

In the initial position setting process, the traditional method is to repeatedly start the motor and reconnect the power line, which adds a lot of tedious setting work, which makes the research and development cycle or maintenance cycle longer and inefficient

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  • Method for correcting phase sequence of power line of permanent magnet synchronous motor driver of electric car
  • Method for correcting phase sequence of power line of permanent magnet synchronous motor driver of electric car
  • Method for correcting phase sequence of power line of permanent magnet synchronous motor driver of electric car

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Embodiment Construction

[0043] The present invention will be described in more detail below in conjunction with the accompanying drawings and embodiments.

[0044]In the method steps of the present invention, it is necessary to perform certain corrections to the collected rotor electrical angles according to the connection phase sequence of the driver and the motor power line. In order to further understand the above correction method, the specific correction method of the rotor electrical angle is deduced below through the interaction of the rotor magnetic field and the stator magnetic field of the permanent magnet synchronous motor.

[0045] The derivation process of the rotor electrical angle correction method:

[0046] The drive power line terminals include terminal A, terminal B, and terminal C, the three-phase permanent magnet synchronous motor power line terminals include terminal U, terminal V, and terminal W, and the driver power line terminals are connected to the three-phase permanent magn...

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Abstract

The invention relates to a method for correcting a phase sequence of a power line of a permanent magnet synchronous motor driver of an electric car. The permanent magnet synchronous motor driver inputs low currents in the fixed direction into a permanent magnet synchronous motor to enable the motor to rotate, the connecting phase sequence of the power lines of the driver and the motor is judged through the forward and reverse rotating direction of the motor, then a collected rotor electrical angle is corrected, and therefore the motor can operate normally. The connecting phase sequence of the power lines of the driver and the motor does not need to be known, and the connecting phase sequence can be judged automatically. When the connecting phase sequence is not correct, the power line does not need to be connected again. Therefore, in the development process of the three-phase permanent magnet synchronous motor driver of the electric car or the maintenance process of the electric car, technicists can connect the power lines of the driver and the motor freely, line connection, phase sequence testing and other complex work are reduced, development and maintenance work efficiency can be greatly improved, and the accident that the motor or a controller is burnt up due to phase sequence errors is effectively avoided.

Description

technical field [0001] The invention relates to a method for correcting the wrong phase sequence of a power line of a motor driver, in particular to a method for correcting the phase sequence of a power line of a permanent magnet synchronous motor driver for an electric vehicle. Background technique [0002] Because electric vehicles have no pollution and zero emissions, and can obtain electricity from a variety of energy sources, electric vehicles have attracted more and more attention. AC permanent magnet synchronous motor has the advantages of small size, light weight and high efficiency, and has become one of the preferred motors for electric vehicle drives. At present, the control of the permanent magnet synchronous motor used in pure electric vehicles is to synthesize the directional space magnetic field by controlling the three-phase stator current of the motor. In order to effectively control the direction of the magnetic field vector, an accurate measurement of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/14
Inventor 周虎杨平陈磊
Owner 中国东方电气集团有限公司
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