Magnetic mixers

Patent metadata

Field	Value
Publication number	US-2019282980-A1
Application number	US-201716089163-A
Country	US
Kind code	A1
Filing date	Mar 8, 2017
Priority date	Mar 31, 2016
Publication date	Sep 19, 2019
Grant date	—

Abstract

The system and method of the invention pertains to an axial flux stator is implemented to replace the drive-end magnets and the drive motor. The axial flux stator comprises a control circuit to control the voltage and current provided to the stator, to measure the torque and speed of rotation, and to measure the magnetic flux and magnetic flux density produced by the axial flux stator and impeller magnets, individually or in combination. The axial flux stator comprises a plurality of current carrying elements to produce magnetic flux in an axial direction and drive the impeller.

First claim

1 - 135 . (canceled)

136 . A system utilized as a bioreactor mixer, the system comprising:
a rotation drive; a shaft; an impeller capable of rotating around a central axis; and a plurality of magnets positioned in one or more array formats, a first set of magnets in a first array format positioned at a drive end adjacent the rotation drive and a second set of magnets in a second array format positioned at the impeller; wherein the rotation drive is a drive stator.

137 . The system of claim 136 , wherein the second set of magnets forms a Halbach array.

138 . The system of claim 136 , wherein the shaft is a fixed shaft and the impeller is capable of rotating around the fixed shaft.

139 . The system of claim 136 , wherein the shaft is fixed to the impeller and capable of rotating with the impeller around the central axis.

140 . The system of claim 136 , wherein the drive stator is an axial flux stator positioned on an underside of the plurality of magnets.

141 . The system of claim 140 , wherein the axial flux stator comprises a control circuit to control the voltage and current, individually or in combination, provided to the stator.

142 . The system of claim 140 , wherein the axial flux stator comprises a control circuit to measure the torque and speed of rotation.

143 . The system of claim 140 , wherein the axial flux stator comprises a control circuit to measure the magnetic flux and magnetic flux density produced by the axial flux stator and impeller magnets.

144 . The system of claim 140 , wherein the axial flux stator comprises a plurality of current carrying elements to produce magnetic flux in an axial direction and drive the impeller.

145 . The system of claim 140 , wherein the axial flux stator comprises a core to fix the current carrying elements on.

146 . The system of claim 145 , wherein the core is magnetic or non-magnetic.

147 . The system of claim 136 , wherein the drive stator is mounted in a wall of a rigid support vessel and the impeller and shaft are located in a flexible bioreactor bag adapted to be received in the rigid support vessel.

148 . The system of claim 136 , wherein the drive stator is mounted in a bottom wall of a rigid support structure.

149 . The system of claim 147 , wherein the flexible bioreactor bag comprises an impeller receiver structure adapted to receive the impeller and shaft and to align them with the drive stator.

150 . The system of claim 149 , wherein the impeller receiver structure comprises a fixed shaft that is adapted to receive the impeller and to align it with the drive stator.

Assignees

• Gen Electric

Inventors

• Alexander James Pellegrino
• Gebauer Klaus
• Torrey David Allan
• Atalla Ashraf Said
• Didari Sima
• Damren Richard Lee

Classifications

• H02K5/1282

  the partition wall in the air-gap being non cylindrical · CPC title

• H02K21/24

  with magnets axially facing the armatures, e.g. hub-type cycle dynamos · CPC title

• C12M27/02

  Stirrer or mobile mixing elements · CPC title

• H02K1/146

  consisting of a generally annular yoke with salient poles · CPC title

• H02K5/128

  using air-gap sleeves or air-gap discs · CPC title