Controller circuit for Hilden Brandt motor needed..

[LarryC]

@utilitarian

There is no point for Jack to put his device as open source because this is not the type of device that will take advantage of open source in the sense that very very few people will ever be able to reproduce the motor given the high level of machining and precision required. This is not a 50 wind hand size TPU that could be made by anyone and everyone.

I think we can make a version of his motor and help develop some performance characteristics from three modified single coil shaded pole motors linked together. Please check:

http://www.overunity.com/index.php/topic,4679.msg99164.html#msg99164

http://www.overunity.com/index.php/topic,4679.msg99341.html#msg99341

Does anyone know of a larger shaded pole of this type? That motor was from a bathroom fan unit and a larger version would be needed to show real power.

Regards, Larry

[Nali2001]

One important thing to keep in mind is that the basic principle of the Hildenbrand motor is variable reluctance
http://www.srdrives.com/technology.shtml
http://www.fleadh.co.uk/srm.htm
(only Jack uses the great aid of magnets), and as one understands these type of motors it becomes apparent that a very tiny air gap is absolutely required for good performance. Especially when the attraction-interaction surface is not that big to start with. As I remember correctly Jack uses air gaps of about 0.1mm I myself am aiming more for 0.05 to 0.07.
Lindemann also has a forum about these 'attraction motors' http://www.energeticforum.com/renewable-energy/271-electric-motor-secrets.html

Regards,
Steven

[aladinlamp]

One important thing to keep in mind is that the basic principle of the Hildenbrand motor is variable reluctance
http://www.srdrives.com/technology.shtml
http://www.fleadh.co.uk/srm.htm
(only Jack uses the great aid of magnets), and as one understands these type of motors it becomes apparent that a very tiny air gap is absolutely required for good performance. Especially when the attraction-interaction surface is not that big to start with. As I remember correctly Jack uses air gaps of about 0.1mm I myself am aiming more for 0.05 to 0.07.
Lindemann also has a forum about these 'attraction motors' http://www.energeticforum.com/renewable-energy/271-electric-motor-secrets.html

Regards,
Steven

hi

how did you proceed with design showed in this post

http://www.overunity.com/index.php/topic,2386.msg92147.html#msg92147

is this concept good enough <?

Thanx

[Nali2001]

Hi Aladinlamp,
It's getting there.

Well I believe this design is a good one. But it's 'problem' is has a high torque ripple since it is only a two (or one, depends how you look at it) valve design. So in a sense the stator 'throws' the rotor to the next attraction phase with noting in between. So that is why it is important to have overlapping attraction phases. Somewhat like Jacks big 3 valve machine. But building a 3 valve system is a whole different level on itself. especially with such high levels of air gap precision. But one of the beauty of 'my' design is that you can pop on or off the magnets on the fly whiling running to see what impact the magnets have.

Regards,
Steven

[aladinlamp]

Hi Aladinlamp,
It's getting there.

Well I believe this design is a good one. But it's 'problem' is has a high torque ripple since it is only a two (or one, depends how you look at it) valve design. So in a sense the stator 'throws' the rotor to the next attraction phase with noting in between. So that is why it is important to have overlapping attraction phases. Somewhat like Jacks big 3 valve machine. But building a 3 valve system is a whole different level on itself. especially with such high levels of air gap precision. But one of the beauty of 'my' design is that you can pop on or off the magnets on the fly whiling running to see what impact the magnets have.

Regards,
Steven

1.How exactly the ripple influences performance of motor, material, rotor  and their properties <?

2.What material you think is the best for rotor and stator flux sections( assuming from pictures, they are cut from same material)  if price is not an issue ..?

Thanx