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A fault-tolerant control method for maximum torque-current ratio mtpa of five-phase permanent magnet motor considering reluctance torque

A technology of maximum torque current and permanent magnet motors, which is applied in motor control, motor generator control, electronic commutation motor control, etc., and can solve the problems of not fully utilizing the output torque performance of embedded permanent magnet motors

Active Publication Date: 2020-03-31
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the calculation methods of these fault-tolerant currents are generally based on i d The control algorithm of = 0 is suitable for surface-mounted permanent magnet motors. For embedded permanent magnet motors, the reluctance torque of the embedded permanent magnet motor is not fully utilized to increase the output torque of the motor during fault-tolerant operation performance

Method used

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  • A fault-tolerant control method for maximum torque-current ratio mtpa of five-phase permanent magnet motor considering reluctance torque
  • A fault-tolerant control method for maximum torque-current ratio mtpa of five-phase permanent magnet motor considering reluctance torque
  • A fault-tolerant control method for maximum torque-current ratio mtpa of five-phase permanent magnet motor considering reluctance torque

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specific Embodiment 1

[0056] Specific embodiment 1 mainly introduces the maximum torque-to-current ratio fault-tolerant control realized based on virtual signal injection and reduced-order matrix, and its control block diagram is as follows figure 1 shown. The specific implementation manner and implementation effect of this embodiment will be described in detail below in conjunction with the accompanying drawings.

[0057] Step 1, detect the speed of the five-phase permanent magnet motor as the speed feedback of the motor ω r , the given speed ω * r and feedback speed ω r Do the difference to get the speed error e of the motor r , using PI controller according to the speed error e r Calculate the q-axis current of the five-phase permanent magnet motor, and the output of the PI controller is the given q-axis current i * q .

[0058] Step 2, use the current sensor to sample the current i of each phase of the five-phase permanent magnet motor a , i b , i c , i d , i e , to determine the f...

specific Embodiment 2

[0097] The specific embodiment 2 mainly introduces the maximum torque current ratio fault-tolerant control based on high-frequency signal injection and reduced-order matrix, and its control block diagram is as follows figure 2 shown. Compared with the specific embodiment 1, the FT-MTPA algorithm of the specific embodiment 2 adopts the method of high-frequency signal injection, and the high-frequency signal injection does not need the specific parameters of the motor compared with the virtual signal injection, but it will increase the copper of the system. consumption and iron consumption. Attached below Figure 5 and Figure 6 , carefully explain the specific implementation of this embodiment.

[0098] Step 1, detect the speed of the five-phase permanent magnet motor as the speed feedback of the motor ω r , the given speed ω * r and feedback speed ω r Do the difference to get the speed error e of the motor r , using PI controller according to the speed error e r Calc...

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Abstract

The invention discloses a reluctance torque considering fault tolerant control method for the maximum torque per ampere (MTPA) of a five-phase permanent magnet motor, which comprises the steps of detecting the rotation speed of the motor, comparing given rotation speed [omega]*r with feedback rotation speed [omega]r, and obtaining given current i*q of a given q-axis by using a PI controller; enabling the sampled phase current to be subjected to transformation of a reduced-order matrix to obtain d-q-3 axis feedback current idm, iqm and i3m; calculating d-q axis voltage udm, uqm at a fault state; inputting the acquired d-q axis voltage udm, uqm, the current idm, iqm and the rotation speed [omega]r into a maximum torque per ampere fault tolerant (FT-MTPA) model, and acquiring d-axis given current i*d in fault-tolerant running of the motor by using a virtual signal injection method; comparing the d-q-3 axis given current with the feedback current, acquiring d-q-3 axis given voltage through the PI controller, then obtaining phase voltage at a natural coordinate system through the order-reduced matrix, inputting the phase voltage into a CPWM model to obtain a switching signal of each phase, controlling the motor through an inverter, and realizing FT-MTPA control for the five-phase permanent magnet motor.

Description

technical field [0001] The invention relates to the technical field of multi-phase motor fault-tolerant control, in particular to a MTPA fault-tolerant control method for the maximum torque current ratio of a five-phase permanent magnet motor considering reluctance torque. Background technique [0002] Because of its high torque density, high efficiency and high reliability, embedded permanent magnet motors are more and more widely used in the fields of electric vehicle traction, aerospace and marine cruise systems. At the same time, a stable and reliable motor drive system is particularly important for some occasions that require high reliability, such as aircraft and electric vehicles. Therefore, high-reliability fault-tolerant control methods for fault-tolerant permanent magnet motors have received extensive attention. [0003] In recent years, domestic and foreign scholars have conducted in-depth research on the maximum torque-to-current ratio (MTPA) control of embedded...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P21/22H02P21/00H02P6/182H02P29/024H02P29/028
CPCH02P6/182H02P21/0003H02P21/22H02P29/025H02P29/032
Inventor 陈前刘国海赵文祥吉敬华林志鹏王健
Owner JIANGSU UNIV
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