基于液压泵/马达逆向驱动的电机启动电流控制方法

刘桓龙; 李顺; 谢迟新

doi:10.3969/j.issn.0258-2724.20190727

基于液压泵/马达逆向驱动的电机启动电流控制方法

doi: 10.3969/j.issn.0258-2724.20190727

刘桓龙^1,2,,
李顺^1,2,
谢迟新^1,2

基金项目: 四川省科技厅重点研发项目（2018GZ0450）

详细信息

作者简介:
刘桓龙（1977—），男，副教授，研究方向为流体与混合动力技术，E-mail：lhl_swjtu@163.com

中图分类号: U267.1
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- 被引次数: 0
出版历程
- 收稿日期: 2019-07-29
- 修回日期: 2020-05-09
- 网络出版日期: 2021-03-29
- 刊出日期: 2021-08-15

Method of Motor Starting Current Control Based on Hydraulic Pump/Motor Reverse Drive

LIU Huanlong^{1,2
,},
LI Shun^1,2,
XIE Chixin^1,2

摘要

摘要: 针对蓄电池轨道工程车续航里程短、永磁同步牵引电机启动电流大等问题，基于液压泵/马达能量逆向传递特性，提出了利用液压泵/马达逆向驱动的电机启动电流控制新方法. 通过使液压泵/马达工作在马达模式将电机驱动至一定初始转速后接通电源实现电机带速启动，抑制或削弱电机启动电流；永磁同步电机带速启动采用无位置矢量控制方式，结合短路电流矢量法对电机启动时刻的转子转速和位置进行计算，并通过AMESim与MATLAB/Simulink进行联合仿真. 研究结果表明：所提出的电机启动电流控制新方法能让电机的启动峰值电流最大降低70%左右；启动电流与电机接通电源启动时的初始转速有关，且初始转速越接近需求转速则启动电流越小；电机转速稳定后电流大小仅与电机负载有关；液压泵/马达工作排量或蓄能器充液压力越大，电机被逆向驱动时的转速响应越快.
- 电液混合动力 /
- 电机启动电流 /
- 带速启动 /
- 逆向驱动 /
- 液压泵/马达
Abstract: Aiming at the short cruising range of the battery rail engineering vehicles (BREVs) and the large starting current of the permanent magnet synchronous motor (PMSM), a new method of controlling the starting current of the PMSM driven by the hydraulic pump/motor was proposed based on the characteristics of the reverse transmission of the energy of the hydraulic pump/motor. By making the hydraulic pump/motor work in the motor mode, the PMSM was driven to a certain initial speed and then the power was turned on to realize the start of the PMSM with initial speed, which can suppress or weaken the starting current of PMSM. The PMSM was started at initial speed by adopting the positionless vector control method, combined with the short-circuit current vector method, the rotor speed and position at the starting time of the motor were calculated, and the joint simulation was carried out by AMESim and MATLAB/Simulink.The results show that the proposed new method of starting current control of PMSM can reduce the starting peak current of the PMSM by about 70%. The starting current is related to the initial speed when the PMSM is switched on and starting. The closer the initial speed of PMSM is to the required speed, the smaller the starting current is. After the speed of PMSM is stable, the current is only related to the PMSM load. The greater the working displacement of the hydraulic pump/motor or the charging pressure of the accumulator, the faster the speed response of motor during reverse drive.
- electro-hydrostatic hydraulic hybrid powertrain /
- starting current of motor /
- starting with initial speed /
- reverse drive /
- hydraulic pump/motor

HTML全文

图 1 电液混合动力系统原理

Figure 1. Principle of electro-hydrostatic hydraulic hybrid powertrain

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图 2 电机启动电流控制原理

Figure 2. Principle of motor starting current control

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图 3 PID控制原理

Figure 3. Principle of PID controller

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图 4 两次短路电流法计算电机转速及转子位置原理

Figure 4. Principle of calculating motor speed and rotor position based on two short circuit methods

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图 5 基于定子磁链的无位置传感器矢量控制

Figure 5. Position sensorless vector control based on stator flux

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图 6 改进型积分器

Figure 6. Improved integrator

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图 7 联合仿真模型

Figure 7. Co-simulation model

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图 8 短路电流

Figure 8. Short-circuit current

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图 9 短路电流法计算转子位置

Figure 9. Estimating rotor position based on short-circuit current method

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图 10 带速启动和直接启动时电机转速及转速

Figure 10. Motor current and speed of start-up with speed and direct start-up

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图 11 不同初始转速下启动电机时的转速及q轴电流

Figure 11. Motor speed and q-axis current of starting motor at different initial speed

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图 12 不同负载下带速启动时电机的转速及$q$轴电流

Figure 12. Motor speed and q-axis current at start-up with speed under different loads

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图 13 不同蓄能器充液压力下带速启动时电机的转速及$q$轴电流

Figure 13. Motor speed and q-axis current when starting motor with speed under different accumulator hydraulic pressure

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图 14 不同马达排量下带速启动时电机的转速及q轴电流

Figure 14. Motor speed and q-axis current when starting motor with speed under different motor displacement

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表 1 仿真参数设置

Table 1. Simulation parameters

参数名	数值
定子电阻/Ω	0.875
d 轴电感/mH	8.5
q 轴电感/mH	8.5
主磁极磁通/Wb	0.175
极对数	4
转动惯量 J/（kg•m²）	0.01
泵/马达排量/（cc•rev⁻¹）	50
溢流阀调定压力/MPa	4
囊式蓄能器充气压力/MPa	17
囊式蓄能器标称体积/V	40
囊式蓄能器最大压力/MPa	32

下载: 导出CSV

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