MICRO-STEPPING RELUCTANCE MOTOR
First Claim
1. An electrical machine comprising a single stack variable reluctance machine with salient stator teeth and salient rotor teeth, the stator further comprising field magnet sections created by either permanent magnets or field windings or a combination of permanent magnets and field windings, the field magnet sections located in the spaces between every alternate stator tooth and further comprising armature windings each spanning two stator teeth connected to form at least two armature phase windings, the armature phase windings connected to a power source for the supply of positive and negative current to the armature phase windings, the power source being also capable of supplying current simultaneously to at least two armature phase windings and modulating the magnitude of the current in at least one armature phase winding to create incremental rotational movement of the rotor during any part of the machine operation.
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Accused Products
Abstract
The present invention relates to control of electrical motors and in particular, to the design and control of reluctance motors capable of micro-stepping position control. According to the invention there is provided a single stack variable reluctance machine with salient stator teeth and salient rotor teeth, the stator further comprising field magnet sections created by either permanent magnets or field windings or a combination of permanent magnets and field windings, and further comprising armature windings connected to form at least two armature phase windings, the armature phase windings connected to a power source or power electronic inverter for the supply of positive and negative current to at least two armature phase windings such that the rotor rotates in small incremental steps in response to small changes in the current in one or more of the phase windings.
28 Citations
18 Claims
- 1. An electrical machine comprising a single stack variable reluctance machine with salient stator teeth and salient rotor teeth, the stator further comprising field magnet sections created by either permanent magnets or field windings or a combination of permanent magnets and field windings, the field magnet sections located in the spaces between every alternate stator tooth and further comprising armature windings each spanning two stator teeth connected to form at least two armature phase windings, the armature phase windings connected to a power source for the supply of positive and negative current to the armature phase windings, the power source being also capable of supplying current simultaneously to at least two armature phase windings and modulating the magnitude of the current in at least one armature phase winding to create incremental rotational movement of the rotor during any part of the machine operation.
Specification