QINGDAO ENNENG MOTOR CO.,LTD.
| Payment Terms | L/C, T/T |
| Supply Ability | 20000 sets/year |
| Delivery Time | 15-120 days |
| Packaging Details | seaworthy packing |
| Name | PMM Permanent Magnet Motor |
| Current | AC |
| Material | Rare Earth NdFeB |
| Power Range | 5.5-3000kw |
| Poles | 2,4,6,8,10 |
| Voltage | 380V, 660V, 1140V, 3300V, 6KV, 10KV |
| Color | Blue, Grey, etc. |
| Type | IPMSM |
| Housing | Cast iron |
| Frequency | 50hz |
| Brand Name | ENNENG |
| Model Number | PMM |
| Certification | CE,UL |
| Place of Origin | China |
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Product Specification
| Payment Terms | L/C, T/T | Supply Ability | 20000 sets/year |
| Delivery Time | 15-120 days | Packaging Details | seaworthy packing |
| Name | PMM Permanent Magnet Motor | Current | AC |
| Material | Rare Earth NdFeB | Power Range | 5.5-3000kw |
| Poles | 2,4,6,8,10 | Voltage | 380V, 660V, 1140V, 3300V, 6KV, 10KV |
| Color | Blue, Grey, etc. | Type | IPMSM |
| Housing | Cast iron | Frequency | 50hz |
| Brand Name | ENNENG | Model Number | PMM |
| Certification | CE,UL | Place of Origin | China |
| High Light | Lightweight Direct Drive Permanent Magnet Motor ，Direct Drive Permanent Magnet Motor 380V ，Radial Flux PMM Motor | ||
Energy Efficient Radial Flux Direct Drive PMM Permanent Magnet Motor
Brief explanation of permanent magnet motors and advantages
Permanent magnet motors are electrical machines that use permanent magnets instead of electromagnets to generate the magnetic field required for their operation. These motors have several advantages over traditional motors that use electromagnets:
1. Higher efficiency: Permanent magnet motors have higher efficiency than traditional motors because they have lower losses due to the absence of current in the rotor windings.
2. Better power density: Permanent magnet motors have a higher power density than traditional motors because they can generate a stronger magnetic field with a smaller amount of material.
3. Smaller size and weight: Due to their higher power density, permanent magnet motors can be designed to be smaller and lighter than traditional motors, making them ideal for applications where space and weight are a concern.
4. Lower maintenance: Permanent magnet motors have fewer moving parts than traditional motors, which means they require less maintenance and have a longer lifespan.
5. Better control: Permanent magnet motors have better control because they can respond faster to changes in load and speed, making them suitable for applications that require precise control.
Working of Permanent Magnet Synchronous Motor
The permanent magnet synchronous motor working principle is similar to the synchronous motor. It depends on the rotating magnetic field that generates electromotive force at synchronous speed. When the stator winding is energized by giving the 3-phase supply, a rotating magnetic field is created in between the air gaps.
This produces the torque when the rotor field poles hold the rotating magnetic field at synchronous speed and the rotor rotates continuously. As these motors are not self-starting motors, it is necessary to provide a variable frequency power supply.
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.
Back-emf waveform:
Back emf is short for back electromotive force but is also known as the counter-electromotive force. The back electromotive force is the voltage that occurs in electric motors when there is a relative motion between the stator windings and the rotor’s magnetic field. The geometric properties of the rotor will determine the shape of the back-emf waveform. These waveforms can be sinusoidal, trapezoidal, triangular, or something in between.
Both induction and PM machines generate back-emf waveforms. In an induction machine, the back-emf waveform will decay as the residual rotor field slowly decays because of the lack of a stator field. However, with a PM machine, the rotor generates its own magnetic field. Therefore, a voltage can be induced in the stator windings whenever the rotor is in motion. Back-emf voltage will rise linearly with speed and is a crucial factor in determining maximum operating speed.
Permanent magnet AC (PMAC) motors have a wide range of applications including:
Permanent magnet synchronous motors can be combined with frequency converters to form the best open-loop steppless speed control system, which has been widely used for speed control transmission equipment in petrochemical, chemical fiber, textile, machinery, electronics, glass, rubber, packaging, printing, paper making, printing and dyeing, metallurgy and other industries.
A PM motor can be separated into two main categories: surface permanent magnet motors (SPM) and interior permanent magnet motors (IPM). Neither motor design type contains rotor bars. Both types generate magnetic flux by the permanent magnets affixed to or inside of the rotor.
SPM motors have magnets affixed to the exterior of the rotor surface. Because of this mechanical mounting, their mechanical strength is weaker than that of IPM motors. The weakened mechanical strength limits the motor’s maximum safe mechanical speed. In addition, these motors exhibit very limited magnetic saliency (Ld ≈ Lq).
Inductance values measured at the rotor terminals are consistent regardless of the rotor position. Because of the near unity saliency ratio, SPM motor designs rely significantly, if not completely, on the magnetic torque component to produce torque.
IPM motors have a permanent magnet embedded into the rotor itself. Unlike their SPM counterparts, the location of the permanent magnets makes IPM motors very mechanically sound, and suitable for operating at very high speeds. These motors also are defined by their relatively high magnetic saliency ratio (Lq > Ld). Due to their magnetic saliency, an IPM motor has the ability to generate torque by taking advantage of both the magnetic and reluctance torque components of the motor.
Advantages
Small And Lightweight
In special electromagnetic and structural design, the volume-to-weight ratio is reduced by 20%, the length of the whole machine is reduced by 10%, and the full rate of stator slots is increased to 90%.
Highly Integrated
The motor and the inverter are highly integrated, avoiding the external circuit connection between the motor and the inverter, and improving the reliability of the system products.
Energy Efficient
High-performance rare-earth permanent magnet material, special stator slot, and rotor structure make this motor efficient up to IE4 standard.
Custom Design
Customized design and manufacture, dedicated to special machines, reduce redundant functions and design margins and minimize costs.
Low Vibration And Noise
The motor is directly driven, the equipment noise and vibration are small, and the impact on the construction work environment is reduced.
Maintenance Free
No high-speed gear parts, no need to change gear lubricant regularly, and truly maintenance-free equipment.
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.
What applications use PMSM motors?
Permanent magnet synchronous motors have the advantages of simple structure, small size, high efficiency, and high power factor. It has been widely used in the metallurgical industry (ironmaking plant and sintering plant, etc.), ceramic industry (ball mill), rubber industry (internal mixer), petroleum industry (pumping unit), textile industry (double twist machine, spinning frame) and other industries in the medium and low voltage motor.
Why you should choose an IPM motor instead of an SPM?
1. High torque is achieved by using reluctance torque in addition to magnetic torque.
2. IPM motors consume up to 30% less power compared to conventional electric motors.
3. Mechanical safety is improved as, unlike in an SPM, the magnet will not detach due to centrifugal force.
4. It can respond to high-speed motor rotation by controlling the two types of torque using vector control.
Company Details
Business Type:
Manufacturer
Year Established:
2014
Total Annual:
2,000,000.00-4,000,000.00
Employee Number:
100~200
Ecer Certification：
Site Member
The value of Enneng is Technology is how we do things. People are why we do things. As a leading manufacturer of permanent magnet AC motors and generators, Enneng is committed to providing the best solutions for our customers while also prioritizing energy savings and low carbon emissio... The value of Enneng is Technology is how we do things. People are why we do things. As a leading manufacturer of permanent magnet AC motors and generators, Enneng is committed to providing the best solutions for our customers while also prioritizing energy savings and low carbon emissio...
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