Heavy Duty Gearless Variable Frequency Drive Motor High Power Density

Why choose permanent magnet ac motors?

Permanent magnet AC (PMAC) motors offer several advantages over other types of motors, including:

High Efficiency: PMAC motors are highly efficient due to the absence of rotor copper losses and reduced winding losses. They can achieve efficiencies of up to 97%, resulting in significant energy savings.

High Power Density: PMAC motors have a higher power density compared to other motor types, which means they can produce more power per unit of size and weight. This makes them ideal for applications where space is limited.

High Torque Density: PMAC motors have a high torque density, which means they can produce more torque per unit of size and weight. This makes them ideal for applications where high torque is required.

Reduced Maintenance: Since PMAC motors have no brushes, they require less maintenance and have a longer lifespan than other motor types.

Improved Control: PMAC motors have better speed and torque control compared to other motor types, making them ideal for applications where precise control is required.

Environmentally Friendly: PMAC motors are more environmentally friendly than other motor types since they use rare earth metals, which are easier to recycle and produce less waste compared to other motor types.

Overall, the advantages of PMAC motors make them an excellent choice for a wide range of applications, including electric vehicles, industrial machinery, and renewable energy systems.

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.

Medical Equipment: PMAC motors are used in medical equipment, such as MRI machines, where they offer high torque density, precise control, and low noise levels. They are often used in the motors that drive the moving parts in these machines.

Analysis of the Application of Modern Permanent Magnet Motor Technology

1. Application of permanent magnet electromechanical technology to the home appliance market

The application of permanent magnet motor technology to the home appliance market is manifested in VCDDVD and computers. At present, it has gradually formed the development of industrialization and has gradually expanded to multi-phase variable speed drives. For example, people use Inverter air conditioners use modern permanent magnet motor technology to improve the operating efficiency of the air conditioner, gradually reduce the volume of the air conditioner motor, and minimize the noise caused by the air conditioner.

2. Application of permanent magnet electromechanical technology in the elevator market

The permanent magnet motor variable speed system has been used in the elevator market for almost 10 years. For example, by using a low-speed rare earth permanent magnet motor as the elevator traction machine, the use of rare earth permanent magnet motor can save elevator use 20 % of electric energy. Modern permanent magnet motors are usually used in the field of variable-speed drive systems with large load changes and high-speed adjustment requirements.

3. Application of permanent magnet electromechanical technology in industrial and mining enterprises

With the development of permanent magnet motors, large torque permanent magnet motors have been well developed, especially the successful launch of permanent magnet variable frequency motors on the market has given heavy industrial and mining enterprises new choices. Since the output torque of the permanent magnet motor is large enough, the use of the mechanical transmission is reduced and the speed is controllable. It can run at low speeds. Therefore, the application of the fluid coupling is eliminated, which saves the cost of purchasing related equipment and the maintenance of the above two equipment, which reduces the safety risk, so the permanent magnet variable frequency motor is very popular in many industrial and mining enterprises. Because of its variable frequency speed regulation function, it provides a strong guarantee for users to improve production efficiency and save electric energy. Therefore, modern permanent magnet variable frequency motors are a necessary choice for industrial and mining enterprises to upgrade their equipment in the future.

Permanent magnet synchronous motors with internal magnets: Maximum energy efficiency

The permanent magnet synchronous motor with internal magnets (IPMSM) is the ideal motor for traction applications where the maximum torque does not occur at maximum speed. This type of motor is used in applications that require high dynamics and overload capacity. And it is also the perfect choice if you want to operate fans or pumps in the IE4 and IE5 range. The high purchase costs are usually recouped through energy savings over the run time, provided that you operate it with the right variable frequency drive.

Our motor-mounted variable frequency drives use an integrated control strategy based on MTPA (Maximum Torque per Ampere). This allows you to operate your permanent magnet synchronous motors with maximum energy efficiency. The overload of 200 %, the excellent starting torque, and the extended speed control range also allow you to fully exploit the motor rating. For fast recovery of costs and the most efficient control processes.

Permanent magnet synchronous motors with external magnets for classic servo applications

Permanent magnet synchronous motors with external magnets (SPMSM) are ideal motors when you need high overloads and rapid acceleration, for example in classic servo applications. The elongated design also results in low mass inertia and can be optimally installed. However, one disadvantage of the system consisting of SPMSM and variable frequency drive is the costs associated with it, as expensive plug technology and high-quality encoders are often used.

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.

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.

ENNENG is dedicated to providing customers with stable and energy-efficient permanent magnet motors and solutions, not only saving large amounts of energy and cost for our customers but also contributing to the energy conservation and emission reduction of the social.