Control of Electrical Machines
First Claim
1. A control map for a controller of an electrical machine having a rotor and at least one electrically energisable phase winding, the control map comprising a predetermined advance angle profile representing energisation of the phase winding with respect to angular position of the rotor over a range of rotor speeds, and an angle correction factor to be applied to a predetermined portion of the advance angle profile.
1 Assignment
0 Petitions
Accused Products
Abstract
An electrical machine, such as a switched reluctance motor, has a rotor and at least one electrically energizable phase winding. A control map is derived during production that includes a predetermined advance angle profile representing the energization of the phase winding with respect to the angular position of the rotor over a range of rotor speeds. This is stored in memory in a controller together with an angle correction factor to be applied to a predetermined portion of the advance angle profile. The angle correction factor compensates for the difference between a desired input power and the measured input power. The correction factor may be transmitted to the controller by means of radio frequency signals.
112 Citations
27 Claims
- 1. A control map for a controller of an electrical machine having a rotor and at least one electrically energisable phase winding, the control map comprising a predetermined advance angle profile representing energisation of the phase winding with respect to angular position of the rotor over a range of rotor speeds, and an angle correction factor to be applied to a predetermined portion of the advance angle profile.
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9. A method of generating a control map for a controller of a machine having a rotor and at least one electrically energisable phase winding, the method comprising:
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producing a predetermined advance angle profile representing energisation of the phase winding with respect to the angular position of the rotor over a range of rotor speeds;
energising the winding in accordance with the advance angle profile; and
producing an angle correction factor to be applied to a predetermined portion of the control map. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. (canceled)
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21-24. -24. (canceled)
Specification