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Permanent Magnet Synchronous Motor
(PMSM)
• Brushless and has very high reliability and efficiency.
• Due to its permanent magnet rotor, it also has a high torque with a small
frame size and no rotor current.
• Instead of using winding for the rotor, permanent magnets are mounted to
create a rotating magnetic field.
• As there is no supply of DC source, these types of motors are very simple
and less cost.
• The permanent magnet synchronous motors are AC synchronous motor
whose field excitation is provided by permanent magnets and that has a
sinusoidal back EMF waveform.
• The permanent magnets enable the PMSM to generate torque at zero
speed.
• This motor delivers high-efficiency operations and requires a digitally
controlled inverter.
Permanent Magnet Synchronous Motor
(PMSM)
Permanent Magnet Synchronous Motor
(PMSM)
• According to the design of the
rotor, the PMSM are divided
into:
• surface permanent magnet
synchronous motor;
• interior permanent magnet
synchronous motor.
Surface Permanent Magnet Synchronous Motor
2 Poles or 4 Poles surface mounted motors
• Working Principle is based on
Magnetic Locking between
Stator Poles (Formed due to
rotating magnetic field) and
Rotor Poles (Formed due to
Permanent magnets)
Permanent Magnet Synchronous Motor
(PMSM)
• Depending on the stator
design, a permanent magnet
synchronous motor can be:
• with distributed winding;
• with concentrated winding.
distributed winding concentrated winding
Permanent Magnet Synchronous Motor
(PMSM)
• The rotor is located inside the
stator of the electric motor.
• There are also structures
with an external rotor - inside
out electric motors.
Permanent Magnet Synchronous Motor
(PMSM)
• Three-phase distributed
winding circuit.
• Three-phase concentrated
winding circuit.
CAD Drawing of PMSM Motors
Initial PMSM rotor and stator CAD
drawing.
The main sizes of the stator and
rotor iron core laminations.
All Dimensions in mm.
Permanent Magnet Synchronous Motor
(PMSM)
Advantages
• The advantages of permanent magnet synchronous motor
include,
• Dynamic performance in both high and low-speed operation
• High power density
• Low rotor inertia makes it easy to control
• No torque ripple when the motor is commutated
• High and smooth torque
• High efficiency at high speeds
• Resistant to wear and tear
• Available in small sizes at different packages
• Easy maintenance and installation
• Capable of maintaining full torque at low speeds
• High reliability
• Efficient dissipation of heat
• Less noisy
Disadvantages
• The disadvantages of permanent magnet synchronous
motors are
• High initial cost
• Very expensive
• Difficult to start up because it is not a self-starting motor
Applications
• The permanent magnet synchronous motors applications are
• Air conditioners
• Refrigerators
• AC compressors
• Direct-drive washing machines
• Automotive electrical power steering
• Machine tools
• Control of traction
• Data storage units
• Servo drives
• Electric vehicle drivetrain
• Large power systems to improve leading, and lagging power factor
• Industrial applications like robotics, aerospace, and many more.

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Permanent Magnet Synchronous Motor (PMSM).pptx

  • 1. Permanent Magnet Synchronous Motor (PMSM) • Brushless and has very high reliability and efficiency. • Due to its permanent magnet rotor, it also has a high torque with a small frame size and no rotor current. • Instead of using winding for the rotor, permanent magnets are mounted to create a rotating magnetic field. • As there is no supply of DC source, these types of motors are very simple and less cost. • The permanent magnet synchronous motors are AC synchronous motor whose field excitation is provided by permanent magnets and that has a sinusoidal back EMF waveform. • The permanent magnets enable the PMSM to generate torque at zero speed. • This motor delivers high-efficiency operations and requires a digitally controlled inverter.
  • 3. Permanent Magnet Synchronous Motor (PMSM) • According to the design of the rotor, the PMSM are divided into: • surface permanent magnet synchronous motor; • interior permanent magnet synchronous motor. Surface Permanent Magnet Synchronous Motor
  • 4. 2 Poles or 4 Poles surface mounted motors • Working Principle is based on Magnetic Locking between Stator Poles (Formed due to rotating magnetic field) and Rotor Poles (Formed due to Permanent magnets)
  • 5. Permanent Magnet Synchronous Motor (PMSM) • Depending on the stator design, a permanent magnet synchronous motor can be: • with distributed winding; • with concentrated winding. distributed winding concentrated winding
  • 6. Permanent Magnet Synchronous Motor (PMSM) • The rotor is located inside the stator of the electric motor. • There are also structures with an external rotor - inside out electric motors.
  • 7. Permanent Magnet Synchronous Motor (PMSM) • Three-phase distributed winding circuit. • Three-phase concentrated winding circuit.
  • 8.
  • 9. CAD Drawing of PMSM Motors Initial PMSM rotor and stator CAD drawing. The main sizes of the stator and rotor iron core laminations. All Dimensions in mm.
  • 10. Permanent Magnet Synchronous Motor (PMSM) Advantages • The advantages of permanent magnet synchronous motor include, • Dynamic performance in both high and low-speed operation • High power density • Low rotor inertia makes it easy to control • No torque ripple when the motor is commutated • High and smooth torque • High efficiency at high speeds • Resistant to wear and tear • Available in small sizes at different packages • Easy maintenance and installation • Capable of maintaining full torque at low speeds • High reliability • Efficient dissipation of heat • Less noisy Disadvantages • The disadvantages of permanent magnet synchronous motors are • High initial cost • Very expensive • Difficult to start up because it is not a self-starting motor
  • 11. Applications • The permanent magnet synchronous motors applications are • Air conditioners • Refrigerators • AC compressors • Direct-drive washing machines • Automotive electrical power steering • Machine tools • Control of traction • Data storage units • Servo drives • Electric vehicle drivetrain • Large power systems to improve leading, and lagging power factor • Industrial applications like robotics, aerospace, and many more.