Method and system for reconstructing phase voltage of permanent magnet synchronous motor

A permanent magnet synchronous motor, phase voltage technology, applied in electrical components, emergency protection circuit devices, etc., can solve the problems of space saving and cost reduction, and achieve the effect of saving space, improving reliability and reducing costs

Pending Publication Date: 2021-10-22
宁波圣龙智能汽车系统有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Permanent magnet synchronous motors are widely used in electronic pumps of new energy vehicles due to their advantages of high power density and light weight. Modern vehicles have high requirements for space. Due to space limitations, in order to save space and reduce costs, additional Using a voltage sensor to detect the phase voltage of the motor cannot achieve the purpose of saving space and reducing costs

Method used

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  • Method and system for reconstructing phase voltage of permanent magnet synchronous motor
  • Method and system for reconstructing phase voltage of permanent magnet synchronous motor
  • Method and system for reconstructing phase voltage of permanent magnet synchronous motor

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Embodiment 1

[0050] This embodiment provides a method for phase voltage reconstruction of a permanent magnet synchronous motor, such as figure 1 As shown, the method includes the steps of:

[0051] S1: Sample the bearing voltage, and obtain the common mode voltage of the motor through the preset first algorithm according to the sampled bearing voltage;

[0052] S2: Obtain the motor angle information through the position sensor, and perform phase voltage reconstruction according to the preset second algorithm to obtain the three-phase voltage of the motor;

[0053] S3: Send the reconstructed three-phase voltage to the motor main control chip through the filter;

[0054] S4: Obtain the overvoltage signal of the phase voltage through the preset judgment process in the motor main control chip.

[0055] Among them, the default first algorithm is:

[0056]

[0057] Among them, v b Indicates the bearing voltage; C wr Indicates the equivalent capacitance between the stator winding and the ...

Embodiment 2

[0073] This embodiment provides a system for phase voltage reconstruction of a permanent magnet synchronous motor, such as Figure 6 As shown, the system includes:

[0074] Sampling module: used to sample the bearing voltage; the first calculation module: obtain the common mode voltage of the motor through the preset first algorithm according to the sampled bearing voltage; the acquisition module: used to obtain the motor angle information; the second calculation module: according to the preset The second algorithm performs phase voltage reconstruction to obtain the three-phase voltage of the motor; transmission module: used to transmit the reconstructed three-phase voltage to the main control chip of the motor through a filter; Set up the judgment process to get the overvoltage signal of the phase voltage.

[0075] Specifically, the module is used to sample the bearing voltage, and the common-mode voltage of the motor is obtained by the first algorithm module; combined with ...

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Abstract

The invention relates to the technical field of bearing testing, and discloses a method and a system for reconstructing phase voltage of a permanent magnet synchronous motor, and the method comprises the steps: S1, sampling a bearing voltage, and obtaining a common-mode voltage of a motor through a preset first algorithm according to the sampled bearing voltage; S2, obtaining motor angle information through a position sensor, and carrying out phase voltage reconstruction according to a preset second algorithm to obtain three-phase voltage of the motor; S3, transmitting the reconstructed three-phase voltage to a motor main control chip through a filter; and S4, obtaining an overvoltage signal of the phase voltage through a preset judgment process in the motor main control chip. According to the method, the reliability of the motor control system can be improved, the phase voltage of the motor can be detected without installing an additional voltage sensor, and the purposes of saving space and reducing cost are achieved while the driver is protected.

Description

technical field [0001] The invention relates to the technical field of bearing testing, in particular to a method and system for phase voltage reconstruction of a permanent magnet synchronous motor. Background technique [0002] Permanent magnet synchronous motor is composed of stator, rotor and end cover and other components. The stator is made of laminated sheets to reduce the iron loss generated when the motor is running, and it is equipped with three-phase AC windings, called armatures. The rotor can be made in solid form or pressed from laminations with permanent magnet material on them. According to the position of the permanent magnet material on the motor rotor, the permanent magnet synchronous motor can be divided into two structural forms: protruding type and built-in type. The armature winding can be concentrated full-pitch winding, or distributed short-pitch winding and unconventional winding. The magnetic circuit structure of the built-in rotor mainly include...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H7/09
CPCH02H7/09
Inventor 闫浩罗力成王雪皎陈永龙
Owner 宁波圣龙智能汽车系统有限公司
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