 Motor |
| The motor of the invention comprises a stator core having plural teeth and slots provided among ... |
|
| Permanent magnet motor |
| This invention has been achieved to solve the above-mentioned problem, and it is an object of the ... |
|
| Interior permanent magnet synchronous motor |
| The present invention has been made in view of the foregoing disadvantage of the prior art. A... |
|
| Electric machine with integrated power electronics |
| Referring now to FIG. 1, an electric machine 10 is illustrated in a circumference mount ... |
|
| Brushless motor for partable electronic equipment with wire treatment technique of coils |
| Thus, the present invention has an object to provide a wire treatment technique which can make ... |
|
| Spindle motor |
| A primary object of the invention is to provide a spindle motor which makes it possible to prevent ... |
|
| Lanced strip and edgewise wound core |
| Among the several objects of the present invention may be noted the provision of an improved ... |
|
| Axial flux reluctance machine with two stators driving a rotor |
| The present invention concerns an axial flux reluctance machine and methods for operating such a ... |
|
| Axial bolt-in cage stator frame assembly and method for assembling a stator |
| The invention is embodied in a stator cage design that allows parallel manufacturing of the stator ... |
|
|
Simplified control for running a switched reluctance motor
| Details |
Inventors: Mehlhorn, William L.;
Assignee: A. O. Smith Corporation (Milwaukee, WI)
Primary Examiner: Shoop, Jr.; William M.
Assistant Examiner: Leykin; Rita
Attorney, Agent or Firm: Michael Best & Friedrich LLP
A control circuit for controlling a switch reluctance motor including at least one phase, the control comprising a power stage including means for variably supplying a DC voltage, and a winding stage including for each phase a phase winding having one end and another end. The winding stage further includes a high voltage bus connected to the power stage, and a low voltage bus connected to the power stage. The winding stage further includes, for each phase, a first current path comprising an upper commutating switch connected to the high voltage bus, the respective phase winding one end connected to the upper switch, and a lower commutating switch connected to the respective phase winding other end and to the low voltage bus. The winding stage also includes, for each phase, a second current path comprising a first unidirectional current flow device connected to the low voltage bus and to between the upper switch and the respective phase winding one end, and a second unidirectional current flow device connected to between the respective phase winding other end and the lower switch and connected to the high voltage bus. |
|
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT As illustrated in FIGS.
1 and 8, this invention is a control circuit 10 for controlling a switch reluctance motor 14 including at least one phase 18, the control 10 comprising a power stage 22 including means for supplying a variable DC voltage, and a winding stage 26 including for each phase a phase winding having one end 30 and another end 34.
The winding stage 26 further includes a high voltage bus 38 connected to the power stage 22, a low voltage bus 42 including a first branch 46 connected to the power stage 22, and a second branch 50 separate from the first branch 46 and connected to the power stage 22.
The winding stage 26 further includes, for each phase, a first current path 54 comprising an upper commutating switch 58 connected to the high voltage bus 38, the respective phase winding one end 30 connected to the upper switch 58, and a lower commutating switch 62 connected to the respective phase winding other end 34 and to the low voltage bus first branch 46.
The winding stage 26 also includes a second current path 66 comprising a first unidirectional current flow device or diode 70 connected to the low voltage bus second branch 50 and to between the upper switch 58 and the respective phase winding one end 30, and a second unidirectional current flow device or diode 74 connected to between the respective phase winding other end 34 and the lower switch 62 and connected to the high voltage bus 38.
More particularly, the variable voltage means comprises a first unidirectional current flow device or SCR 82 connected to the high voltage bus 38, and a second unidirectional current flow device or SCR 82 connected to the first current flow device 78 and to the low voltage bus 42, the connection point or node 88 between the first and the second current flow devices being adapted to be connected to an alternating current source, and means 92 for variably controlling when the first and second unidirectional current flow devices permit current flow
|
|
Generators or Motors 
