Introduction to IEEE STANDARDS and its different types.pptx
five phase PMSM electrical motor synchronous
1. FAULT TOLERANT ANALYSIS OF
FIVE-PHASE PERMANENT
MAGNET SYNCHRONOUS
MOTOR
SUBMITTED TO,
Dr. CHINMAYA K. A.
ASSISTANT PROFFESOR
SUBMITTED BY,
SHILKY KESHARI
(23082035)
3. Basics of 5-Phase
PMSM
It operates on the principle of synchronism, where the rotor and stator magnetic fields
align to create rotation.
5-Phase PMSMs offer:
Reduced Torque Ripple
Improved Torque Characteristics
Enhanced Efficiency and reliability.
Better fault tolerance
They are used in:
Automotive
Robotics
Aerospace
Renewable Energy
5. FAULT TOLERANT CONTROL
Fault may happen in random number of phases
We will consider 1 phase and 2 phase fault
Healthy operation phase A open phase A and C open phase A and B open
6. FAULT TOLERANT CONTROL
The solution of the above condition system is to align the remaining phases symmetrically
by considering some reasonable constraints:
Currents must be sinusoidal.
Each healthy phase must maintain the same current amplitude.
Post fault currents must be symmetrical to avoid zero sequence currents
Σi* = 0 must be satisfied.
7. FAULT TOLERANT CONTROL
The current vectors are forced to align themselves symmetrically.
In the case of a one‐phase fault, a new set of four current vectors is introduced.
Vector B is set at 45° and each current vector is 90° apart from each other, as shown in Figure
8. FAULT TOLERANT CONTROL
Two open‐phase faults, the post‐fault motor currents must be reconfigured symmetrically so that the
sum of the currents will be zero.
In doing so, the new current vectors are introduced. These vectors are 120° apart from each other,
similar to the conventional three‐phase system shown
9. TORQUE ESTIMATION OF A
ONE‐PHASE FAULT
FIGURE : (a) Torque with respect to the offset angle for a one‐phase fault; (b) proposed
solution for a one‐phase fault.
Equation of torque
10. FIGURE: (a) Torque with respect to the offset angle for two non‐adjacent phase faults; (b)
pro‐ posed solution for two non‐adjacent phase faults.
TORQUE ESTIMATION OF A
TWO‐PHASE FAULT
11. FIGURE: (a) Torque with respect to the offset angle for two adjacent phase faults; (b)
proposed solution for two adjacent phase faults
14. RESULTS
The output torque is reduced by 19% in the case of a one‐phase fault
The output torque is reduced by 46% in the case of two adjacent phase faults
The output torque is reduced by 32% for non‐adjacent phase faults
The motor current increased by 12% in the case of a one‐ phase fault
The motor current increased by 19% in the case of a two‐phase fault
15. CONCLUSION
A case study was per‐ formed to select an optimum point between the achievable
maximum average torque and minimum ripples in accordance with the application
This paper has presented effective post‐fault current control strategies to operate a
five‐phase permanent magnet synchronous motor indefinitely.
The simulation results prove the effectiveness of the proposed fault‐tolerant
solution presented.
16. REFERENCES
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