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PMAC Energy Saving Motor Maintenance Free Low Noise Without Gearbox

Product Details

Place of Origin: China

Brand Name: ENNENG

Certification: CE,UL

Model Number: PMM

Payment & Shipping Terms

Minimum Order Quantity: 1 set

Price: USD 500-5000/set

Packaging Details: seaworthy packing

Delivery Time: 15-120 days

Payment Terms: L/C, T/T

Supply Ability: 20000 sets/year

Get Best Price
Highlight:

Energy Saving PMAC Motor

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Low Noise PMAC Motor

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PMAC Motor Maintenance Free

Name:
PMAC Motor Without Gearbox
Current:
AC
Material:
Rare Earth NdFeB
Power Range:
5.5-3000kw
Voltage:
380v, 660v, 1140v, 3300v, 6kv, 10kv
Housing:
Cast Iron
Efficiency:
Above 93%
Installation:
IMB3, IMB5, IMB35
Cooling:
Natural Cooling
Feature:
Waterproof
Name:
PMAC Motor Without Gearbox
Current:
AC
Material:
Rare Earth NdFeB
Power Range:
5.5-3000kw
Voltage:
380v, 660v, 1140v, 3300v, 6kv, 10kv
Housing:
Cast Iron
Efficiency:
Above 93%
Installation:
IMB3, IMB5, IMB35
Cooling:
Natural Cooling
Feature:
Waterproof
PMAC Energy Saving Motor Maintenance Free Low Noise Without Gearbox

Maintenance Free Low Noise Energy Saving PMAC Motor Without Gearbox

 

What Is The Permanent Magnet Synchronous Motor?

 

A PM motor is an ac motor that uses magnets embedded into or attached to the surface of the motor’s rotor. The magnets are used to generate a constant motor flux instead of requiring the stator field to generate one by linking to the rotor, as is the case with an induction motor. 

 

Analysis of the principle of the technical advantages of permanent magnet motor

 

The principle of a permanent magnet synchronous motor is as follows: In the motor's stator winding into the three-phase current, after the pass-in current, it will form a rotating magnetic field for the motor's stator winding. Because the rotor is installed with the permanent magnet, the permanent magnet's magnetic pole is fixed, according to the principle of magnetic poles of the same phase attracting different repulsion, the rotating magnetic field generated in the stator will drive the rotor to rotate, The rotation speed of the rotor is equal to the speed of the rotating pole produced in the stator.

PMAC Energy Saving Motor Maintenance Free Low Noise Without Gearbox 0

 

Due to the use of permanent magnets to provide magnetic fields, the rotor process is mature, reliable, and flexible in size, and the design capacity can be as small as tens of watts, up to megawatts. At the same time, by increasing or decreasing the number of pairs of rotor permanent magnets, it is easier to change the number of poles of the motor, which makes the speed range of permanent magnet synchronous motors wider. With multi-pole permanent magnet rotors, the rated speed can be as low as a single digit, which is difficult to achieve by ordinary asynchronous motors.

 

Especially in the low-speed high-power application environment, the permanent magnet synchronous motor can be directly driven by a multi-pole design at low speed, compared with an ordinary motor plus reducer, the advantages of a permanent magnet synchronous motor can be highlighted.

PMAC Energy Saving Motor Maintenance Free Low Noise Without Gearbox 1

 

Detailed pictures
 
PMAC Energy Saving Motor Maintenance Free Low Noise Without Gearbox 2

Permanent magnet AC (PMAC) motors have a wide range of applications including:

 

Industrial Machinery: PMAC motors are used in a variety of industrial machinery applications, such as pumps, compressors, fans, and machine tools. They offer high efficiency, high power density, and precise control, making them ideal for these applications.

 

Robotics: PMAC motors are used in robotics and automation applications, where they offer high torque density, precise control, and high efficiency. They are often used in robotic arms, grippers, and other motion control systems.

 

HVAC Systems: PMAC motors are used in heating, ventilation, and air conditioning (HVAC) systems, where they offer high efficiency, precise control, and low noise levels. They are often used in fans and pumps in these systems.

 

Renewable Energy Systems: PMAC motors are used in renewable energy systems, such as wind turbines and solar trackers, where they offer high efficiency, high power density, and precise control. They are often used in the generators and tracking systems in these systems.

 

PM motor structures
PM motor structures can be separated into two categories: interior and surface. Each category has its subset of categories. A surface PM motor can have its magnets on or inset into the surface of the rotor, to increase the robustness of the design. An interior permanent magnet motor positioning and design can vary widely. The IPM motor’s magnets can be inset as a large block or staggered as they come closer to the core. Another method is to have them embedded in a spoke pattern.

 

PM motor inductance variation with load
Only so much flux can be linked to a piece of iron to generate torque. Eventually, the iron will saturate and no longer allow flux to link. The result is a reduction in the inductance of the path taken by a flux field. In a PM machine, the d-axis and q-axis inductance values will reduce with increases in the load current.

 

The d and q-axis inductances of an SPM motor are nearly identical. Because the magnet is outside of the rotor, the inductance of the q-axis will drop at the same rate as the d-axis inductance. However, the inductance of an IPM motor will reduce differently. Again, the d-axis inductance is naturally lower because the magnet is in the flux path and does not generate an inductive property. Therefore, there is less iron to saturate in the d-axis, which results in a significantly lower reduction in flux with respect to the q-axis.

 

PM motor magnet types

There are a few types of permanent magnet materials currently used for electric motors. Each type of metal has its advantages and disadvantages.

 

Self-sensing versus closed-loop operation

Recent advances in drive technology allow standard ac drives to “self-detect” and track the motor magnet position. A closed-loop system typically uses the z-pulse channel to optimize performance. Through certain routines, the drive knows the exact position of the motor magnet by tracking the A/B channels and correcting for errors with the z-channel. Knowing the exact position of the magnet allows for optimum torque production resulting in optimum efficiency.

 

Flux weakening/intensifying of PM motors
Flux in a permanent magnet motor is generated by the magnets. The flux field follows a certain path, which can be boosted or opposed. Boosting or intensifying the flux field will allow the motor to temporarily increase torque production. Opposing the flux field will negate the existing magnet field of the motor. The reduced magnet field will limit torque production, but reduce the back-emf voltage. The reduced back-emf voltage frees up the voltage to push the motor to operate at higher output speeds. Both types of operation require additional motor current. The direction of the motor current across the d-axis, provided by the motor controller, determines the desired effect.

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 in 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

 

Large impact at full power start: When starting at full pressure, the synchronous speed can be drawn in a very short time. The mechanical shock is large. The starting current is more than 10 times the rated current. The impact on the power supply system is large, requiring a large capacity of the power supply system.

 

Rare-earth magnet steel is easy to demagnetize: When the permanent magnet material is subjected to vibration, high temperature, and overload current, its magnetic permeability may decrease, or the demagnetization phenomenon occurs, which reduces the performance of the permanent magnet motor.