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.

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.

What applications use PMSM motors?

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Industries that use PMSM motors include Metallurgical, Ceramic, Rubber, Petroleum, Textiles, and many others. PMSM motors can be designed to operate at synchronous speed from a supply of constant voltage and frequency as well as Variable Speed Drive (VSD) applications. Widely used in electric vehicles (EVs) due to high efficiency and power and torque densities, they are generally a superior choice in high torque applications such as mixers, grinders, pumps, fans, blowers, conveyors, and industrial applications where traditionally induction motors are found.

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.

What are the benefits of a permanent magnet motor with a frequency converter?

The advantages of the permanent magnet motor with a frequency converter mainly include the following aspects:

1. Play an optimal energy-saving effect: The permanent magnet motor can be adjusted by a frequency converter to achieve an optimal operation effect without extra work.

2. Overvoltage protection: The output of the inverter has a voltage detection function, and the inverter can automatically adjust the output voltage so that the motor does not withstand overvoltage. Even when the output voltage adjustment fails and the output voltage exceeds 110% of the normal voltage, the inverter will protect the motor by shutting down.

3. Under-voltage protection: When the voltage of the motor is lower than 90% of the normal voltage, the inverter will stop for protection.

4. Overcurrent protection: When the current of the motor exceeds 150%/ 3 seconds of the rated value, or 200%/ 10 microseconds of the rated current, the inverter protects the motor by stopping.

5. Phase loss protection: monitor the output voltage, when the output phase is missing, the inverter will alarm, and the inverter will stop to protect the motor after a period of time.

6. Reverse phase protection: The inverter can be set so that the motor can only rotate in one direction, and the rotation direction cannot be set. Unless the user changes the phase sequence of the motor A, B, and C wiring, there is no possibility of reverse phase.

7. Overload protection: The inverter monitors the motor current. When the motor current exceeds 120% of the rated current for 1 minute, the inverter protects the motor by stopping.

8. Grounding protection: The inverter is equipped with a special grounding protection circuit, which is generally composed of grounding protection transformers and relays. When one or two phases are grounded, the inverter will alarm. Of course, if the user requests, we can also design to protect the shutdown immediately after grounding.

9. Short-circuit protection: After the inverter output is short-circuited, it will inevitably cause overcurrent, and the inverter will stop to protect the motor within 10 microseconds.

10. Overclocking protection: The inverter has the maximum and minimum frequency limit function so that the output frequency can only be within the specified range, thus realizing the overclocking protection function.

11. Stall protection: Stall protection is generally aimed at synchronous motors. For an asynchronous motor, the stall during acceleration must be manifested as overcurrent, and the inverter realizes this protection function through overcurrent and overload protection. Stalls during deceleration can be avoided by setting a safe deceleration time during commissioning.