Synchronous Motors Overview and Types Comparison 

I am glad to hear that :-)

Thank you for leaving a nice comment. It helps a lot

Thank you very much. We have seen that you are dealing with skateboards. If you need help with electric motors for skateboards, we will be happy to help you!

With pleasure, I am glad if I can help 🤙

Thanks a lot 🙂

This motivates me to continue.

Thank you very much. Allow me a question, what do you mean by new? Abb's SynRM is already 7 or 8 years old, isn't it?

@@Electric-Motor Perhaps it is only new to myself and to this part of the U.S. in a municipal application. Our company covers the Pacific Northwest U.S. and no one here has ever heard of this type of motor used in municipal pumping. We are requesting more info from ABB. With NEPA Premium Efficiency rated induction motors already getting 95% efficiency, there doesn't appear to be much room for significant gains in efficiency, particularly if the cost is higher for the synRM.

Hello, an efficiency of 95% for an induction motor sounds extremely high! That will probably really only be the electric motor without inverter? I can agree with you that you can hardly achieve a higher efficiency. However, you must also look at the efficiency over the complete speed range! Especially pumps and blowers are usually operated in the medium speed range. I could very well imagine that in the lower and middle speed range a SynRM achieves better efficiencies. Maybe you have data sheet of the induction motor you use?

Thank you for your question. Do you mean a video about the control of a IPmSynRM?

Thank you very much. If you like you can follow me on Twitter twitter.com/MarkusScheven

Vielen herzlichen Dank. Es freut mich mal wieder was aus Regensburg zu hören :-)

Thank you very much. I did not understand your question exactly. You would like to have a video about the control of a PMSM or what do you mean by starting mechanism?

@@Electric-Motor Yes that's right...control of PMSM!

Ok at the moment I do not have so much time but I have planned that in any case for this year.

Thank you very much. I would also like to have more subscribers, but there are only a few people who are interested in electric motors. What you use electric motors for, do you build electric motors yourself.

@@Electric-Motor im rewinding electric motors and generator,and try to make more improvment on it to increase their effeciency

I suggest for you to make experiements with real motor and generator

I have planned to make videos about inverters and their control, but first I want to provide people with all the information about electric motors. You are absolutely right the subject is very very important and has enormous influence on the efficiency of the electric motor.

This is a very good idea for a video. Right now I'm working on two new videos in parallel but I'll implement your suggestion this year. Thanks for the great idea

Thank you very much! That's a very good question the answer is not so easy because there are several types of stepper motors. Stepper motors are usually short flux path motors, which is a special type of switched reluctance motor. And many stepper motors also have magnets, so strictly speaking they are not pure reluctance motors anymore. Hope the answer helped you?

Thank you for your question. Yes it is possible but expensive if you only use techniques that are state of the art. The voltage tends not to be a problem, but electric motors with small voltage also tend to have smaller currents and therefore smaller power. Therefore electric motors e.g. pumps are then also smaller. For good efficiency, the air gap should be proportional to the size of the electric motor. For reluctance motors, however, the air gap must be very small in order to achieve good efficiency. This means that very good bearings and thin electrical sheets must be used. This makes things more expensive. But if you think a little bit outside the box, you can find cheaper solutions and use a SynRm for small electric motors with low voltages. I hope this could answer your question? I hope this could answer your question? I have answered a similar question under the video about electric motor types, the answer is a bit more detailed.

Hello Thank you for your question. You mean without using an external voltage or without turning the motor?

@@Electric-Motor Yes👍

@@hinrigardehes3253 Ok that is difficult! Do you have maybe a photo of the identification plate or of the rotor and stator? Maybe I can see something on it and then help you out.

Hello thank you for your question. You mean what is the difference between a SPMSM and a IPMSM motor? Did I understand you correctly?

@@Electric-Motor yes. There has to be another reason except just location

@@ArslanArda So, of course, there are several reasons. The magnets for a SPMSM are usually not block-shaped magntes. This means that the shaped magnets for a SPMSM are more expensive to produce. The block shaped magnets for an IPMSM are cheaper. If the magnets for an IPMSM are arranged in a V-shape, for example, a reluctance torque can also be generated. This gives the motor a higher power density. A SPMSM usually has a higher efficiency but only in a very small speed range and the torque ripple is very small. As a result, the motor runs more smoothly and quietly. So you can't say an IPMSM is better than an SPMSM. It always depends on what goals you want to achieve. Can you give me a short feedback if I could answer your questions?

@@Electric-Motor this explanation is quite good for me :) thanks a lot.

There is not really any permanent magnet switched reluctance motor! There are only two types of reluctance motors, switched reluctance motors and synchronous reluctance motors. Maybe you mean an IPMSM, which has magnets but uses an additional reluctance torque. IPMSM = "Interior Permanent Magnet Synchronous Motor" I hope this helps you and thank you very much for your question. You would help me a lot if you subscribe to my little channel.

@@Electric-Motor thank you for the reply. I am particularly interested in Tesla's claim that they are using a pmsrm in the rear of there vehicle. Do you think it is magnets in stator or something shown in this video. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-n4YD8Nvyfa4.html. Any information on identifying the workings of the model 3 rear motor would be greatly appreciated.

After the current official teardowns, the motor is an IPMSM! Permanent magnets in a normal stator don't really make sense, because the direction of the magnetic field always changes. If you would split the stator you could use magnets also in the stator. But what speaks against it is the higher temperature load of the magnets in the stator. This would require very expensive magnets to avoid demagnetization. May I ask why you are so interested in the new Tesla motor?

Switched reluctance motors are not really synchronous motors. Their main difference to true synchronous motors is that their rotor does NOT rotate synchronous with the magnetic field of the stator. This means that you can't combine them with permanent magnet synchronous motors (where the rotor stays synchronous to the stator's field). As the rotor stays synchronous to the stator's field in both the "synchronous reluctance" and the "permanent magnetic synchronous" motors (though at slightly different angles) those two types CAN easily be combined. (In a switched reluctance motor, the rotor does stay synchronous to some fixed _fraction_ of the rotation rate of the magnetic field, though. So you might classify them as synchronous motors or asynchronous motors, depending on the definition of "synchronous motor" you use.) I came here form this video ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-esUb7Zy5Oio.html which explains Tesla's motor type a bit better.

Thank you for your comment, however the definition of synchronous and asynchronous refers to the speed of the electric motor. Therefore, all reluctance motors belong to synchronous motors! I share this opinion with Mr. Hendershot, who is one of the most famous specialists in electric motors! Unless you combine a reluctance motor with an induction motor, that would be a hybrid electric motor. Nevertheless, thank you for your comment, please let me know if you have a different opinion on the subject or a question.

Simply explained, a higher power density can be achieved with an IPMSM. The production is cheaper due to the rectangular magnets, which is why IPMSMs are primarily used for electric vehicles today. I hope I could answer your question?

@@Electric-Motor yes, thankyou

What other details are you interested in?

Dear Aleksander, thank you for your feedback, it's a pity that you didn't like the video. What do you think I should have done better?

So you would prefer a reluctance motor or an electrically excited motor?

@@Electric-Motor No ! In general, the structure of induction electromotor is also incorrect. It consumes very high energy. I have been building an electromotor with a new structure for eleven years, which will drastically reduce consumption by about 70 to 90%.

That sounds interesting. What basic physical principle does the electric motor you developed use?

@@Electric-Motor This electric motor is not free energy This motor consumes only less power ☺

Yes, but I want to help as many people as possible with the videos. Especially in countries that don't have so much money to spend on education.

@@Electric-Motor Excellent answer Sir, all the best of luck!👌👌