high cost of permanent magnet synchronous motors

Why Is The High Cost Of Permanent Magnet Synchronous Motors?

Permanent magnet synchronous motors (PMSMs) have gained widespread usage across various fields due to their high efficiency and low noise characteristics. However, compared to traditional asynchronous motors, PMSMs often come with higher costs. In this blog post, we delve into the reasons behind the high cost of permanent magnet synchronous motors, including material expenses, manufacturing processes, controller costs, maintenance, repair expenses, and market demand.

Reasons for High Cost of Permanent Magnet Synchronous Motor

Material Expenses

PMSMs require the use of high-performance permanent magnet materials such as neodymium iron boron (NdFeB) and cobalt iron (CoFe), which come at relatively higher prices.

The production process of these permanent magnet materials is complex, contributing to increased manufacturing costs. Additionally, fluctuations in the prices of permanent magnet materials in recent years have further escalated the overall cost of PMSMs.

Manufacturing Processes

Compared to asynchronous motors, the manufacturing process of PMSMs is more intricate, demanding higher precision machining techniques and stricter quality control standards.

For instance, ensuring the accuracy of magnet pole positions and orientations, as well as the consistency between the rotor and stator, adds complexity to the manufacturing process, thereby increasing production costs.

Controller Costs

PMSMs require specialized controllers for precise control, which adds to the overall cost. These controllers necessitate the utilization of advanced control algorithms tailored for PMSMs to unleash their exceptional performance, thus augmenting the design and manufacturing expenses.

Moreover, high-precision sensors are required in the controllers to monitor the motor’s operational status, ensuring stability and reliability, further contributing to the overall cost.

Maintenance and Repair Expenses

Due to the unique structure and operating principles of PMSMs, their maintenance and repair costs are relatively high. For instance, if the motor incurs damage to the permanent magnets, it may necessitate the replacement of the entire rotor.

Additionally, since PMSMs typically employ a brushless design, replacing the entire stator assembly during repairs escalates the maintenance expenses. Furthermore, the larger size and weight of PMSMs often require specialized maintenance equipment and technical personnel, further increasing repair costs.

PMSM maintenance and repair expenses

Market Demand

Compared to asynchronous motors, the demand for PMSMs is relatively lower. Manufacturers of PMSMs often bear higher operational costs and marketing expenses due to the smaller market demand. Moreover, the specialized application scope of PMSMs limits their market size, contributing to the overall increase in costs.


In conclusion, the high cost of permanent magnet synchronous motors can be attributed to various factors such as specialized materials, manufacturing processes, controllers, maintenance, and repair expenses, along with market demand constraints.

However, with continuous technological advancements and increasing application requirements, the cost of PMSMs is gradually decreasing, making their usage more prevalent across diverse fields.

As advancements continue and economies of scale are achieved, the affordability and accessibility of PMSMs are expected to improve, further expanding their applications and benefits.

Lamnow – Permanent Magnet Synchronous Motor Laminations Manufacturer

Lamnow is a leading China supplier specializing in the production of electric motor lamination stacks. We utilize progressive stamping, compound stamping, and rotary notching to create precise core laminations for permanent magnet motors.

For laminate prototyping, we employ cutting-edge methods like laser cutting and wire cutting to manufacture lamination prototypes, ensuring accuracy and efficiency in the development phase.

Additionally, our advanced glue bonding process facilitates the stacking and bonding of stator and rotor laminations, guaranteeing optimal performance and durability of the motors. Moreover, our facility boasts automation stator winding machines, streamlining the production process and maintaining consistency in winding quality.


What are the key advantages of PMSMs?

PMSMs offer several advantages, including high efficiency, excellent power density, precise speed and torque control, low noise and vibration levels, and minimal maintenance requirements. These motors are particularly suitable for applications requiring high performance and energy efficiency.

What are the main applications of PMSMs?

PMSMs find widespread applications in various industries, including automotive (electric vehicles), industrial automation, HVAC systems, aerospace, renewable energy (wind turbines), and robotics. Their efficiency, control capabilities, and reliability make them ideal for demanding applications.

Why are more and more electric vehicles using permanent magnet synchronous motors?

The increasing use of permanent magnet synchronous motors (PMSMs) in electric vehicles (EVs) can be attributed to their high efficiency, compact size, precise torque control, and suitability for regenerative braking systems.

PMSMs offer superior performance, longer driving ranges, and reduced maintenance requirements compared to other motor types, making them an ideal choice for EV manufacturers aiming to enhance vehicle performance and energy efficiency.

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