Device capable of increasing rotation speed of magneto motor

• US 6,570,365 B1
• Filed: 02/12/2002
• Issued: 05/27/2003
• Est. Priority Date: 02/12/2002
• Status: Expired due to Fees

• Current Assignee: Chun-Pu Hsu
• Original Assignee: Chun-Pu Hsu
• Inventors: Hsu, Chun-Pu
• Primary Examiner(s): Lam, Thanh
• Application Number:
  US10/072,959
• Time in Patent Office: 469 Days
• Field of Search: 322/37, 322/29, 322/46, 322/47, 310/68.B, 310/67.R, 310/68.R
• US Class Current: 322/37
• CPC Class Codes: H02K 29/08 using magnetic effect devices, e.g. Hall-plates, magneto-resistors H02K29/12 takes precedence

Abstract

Several sets of magnetic sensors are provided in a magneto motor to sense rotary pole variation of the rotor magnet. One set of magnetic sensors lets the stator portion and the rotor portion generate armature reaction of stronger magnetic flux density, and another set of magnetic sensors corresponds to rotary pole variation of the permanent magnet of the rotor portion in advance to let the motor generate weak magnetic control phenomenon so that the stator portion and the rotor portion generate armature reaction of weaker magnetic flux density. The torsion coefficient K_T will decrease to increase the rotation speed of the rotor portion. A motor can be designed to have a larger K_T. When the motor needs to operate at higher rotation speeds, a magnetic detection selection circuit will output a detection output signal letting the motor generate a lower K_T to increase the rotation speed of the magneto motor.

Claims

1. A device capable of increasing the rotation speed of a magneto motor, comprising:

a magneto motor comprising a stator portion and a rotor portion, said stator portion being provided to let exciting coil windings be disposed therein, said rotor portion being a rotary rotor having a permanent magnet, said rotor portion corresponding to said stator so that an armature can react to rotate;

a plurality of sets of magnetic sensors installed at said stator portion with various kinds of angles and used to sense rotary pole variation of the permanent magnet of said rotor portion, the exciting coils of said stator portion and the rotary pole of said rotor portion thus generating variation relations of different angles, synchronous or advance phenomenon of conduction time difference between the detection signal and the exciting coils occurring, thereby generating various kinds of armature reactions of different strengths; and

a magnetic detection signal selection circuit letting said plurality of sets of magnetic sensors integrate a detection output signal via instructions of signal terminals, various kinds of detection output signals letting the exciting coils of said stator portion have different conduction time differences, various kinds of conduction time differences letting said stator portion and said rotor portion generate individual constant armature air gap magnetic flux densities, individual constant magnetic flux densities generating individual constant torsion coefficients K_T so that said magneto motor can generate various kinds of operational rotation speeds.

2. The device capable of increasing the rotation speed of a magneto motor as claimed in claim 1, wherein positions of said plurality of sets of magnetic sensors should not be limited, but the positioned angle of one set of said magnetic sensors will let the conduction time difference of the exciting coils of said stator portion and said rotor portion generate the strongest air gap magnetic flux density and armature reaction of the largest torsion coefficient K_T, while the positioned angle of at least another set of said magnetic sensors will let the conduction time difference of the exciting coils of said stator portion and said rotor portion generate weaker air gap magnetic flux density and armature reaction of smaller torsion coefficient K_T.

3. The device capable of increasing the rotation speed of a magneto motor as claimed in claim 1, wherein positions of said plurality of sets of magnetic sensors should not be limited, but the positioned angle of one set of said magnetic sensors will let the conduction time difference of the exciting coils of said stator portion and said rotor portion generate stronger air gap magnetic flux density and armature reaction of larger torsion coefficient K_T, while the positioned angle of at least another set of said magnetic sensors will let the conduction time difference of the exciting coils of said stator portion and said rotor portion generate weaker air gap magnetic flux density and armature reaction of smaller torsion coefficient K_T.

4. The device capable of increasing the rotation speed of a magneto motor as claimed in claim 1, wherein the selection of the detection output signals of said magnetic detection signal selection circuit is realized by referring to the level of the rotation speed of said motor to generate a rotation speed signal, and said signal terminals will let said magnetic detection signal selection circuit automatically select to output different detection output signals according to the level of the rotation speed of said motor.

5. The device capable of increasing the rotation speed of a magneto motor as claimed in claim 1, wherein the selection of the detection output signals of said magnetic detection signal selection circuit is realized to generate switching signals in manual switching way, and said signal terminals will let said magnetic detection signal selection circuit automatically select to output different detection output signals according to the state of manual switching.

6. The device capable of increasing the rotation speed of a magneto motor as claimed in claim 1, wherein said magnetic detection signal selection circuit includes a switch of mechanical type having contacts therein, and the switch is controlled by instructions of said signal terminals to output the required detection output signal.

7. The device capable of increasing the rotation speed of a magneto motor as claimed in claim 1, wherein said magnetic detection signal selection circuit includes a switching circuit therein, which can be an electronic IC without contacts like an analog IC, a digital IC, or a central processing unit, and the switching circuit is controlled by instructions of said signal terminals to output the required detection output signal.

8. The device capable of increasing the rotation speed of a magneto motor as claimed in claim 1, wherein said stator portion is an outer stator portion of a motor, and said rotor portion is a magneto inner rotor portion of the motor, a magneto inner rotor type motor.

9. The device capable of increasing the rotation speed of a magneto motor as claimed in claim 1, wherein said stator portion is an inner stator portion of a motor, and said rotor portion is a magneto outer rotor portion of the motor, i.e., a magneto outer rotor type motor.

10. The device capable of increasing the rotation speed of a magneto motor as claimed in claim 1, wherein said permanent magnet of said rotor portion is a tube-shaped magnet adhered on the surface of a magnetic conduction iron yoke for armature reaction of said rotor portion, and said plurality of sets of magnetic sensors correspond to rotary pole variation of said permanent magnet to let said rotor portion correspond to said stator portion so that an armature can react to rotate.

11. The device capable of increasing the rotation speed of a magneto motor as claimed in claim 1, wherein said permanent magnet of said rotor portion is formed by individually adhering a plurality of permanent magnets on the surface of a magnetic conduction iron yoke for armature reaction of said rotor portion, and said plurality of sets of magnetic sensors correspond to rotary pole variation of said permanent magnet to let said rotor portion correspond to said stator portion so that an armature can react to rotate.

12. The device capable of increasing the rotation speed of a magneto motor as claimed in claim 1, wherein said permanent magnet of said rotor portion is formed by individually embedding a plurality of permanent magnets into a magnetic conduction iron yoke for armature reaction of said rotor portion, and said plurality of sets of magnetic sensors correspond to rotary pole variation of said permanent magnet to let said rotor portion correspond to said stator portion so that an armature can react to rotate.

13. The device capable of increasing the rotation speed of a magneto motor as claimed in claim 1, wherein the permanent magnet of said rotor portion is another permanent magnet concentric to and synchronously rotating with said rotor portion, and the permanent magnet is for detection of rotation position of said rotor but not for armature reaction, and said plurality of sets of magnetic sensors correspond to rotary pole variation of the permanent magnet to let said permanent magnet for armature reaction of said rotor portion correspond to said stator portion so that an armature can react to rotate.