SWITCHED RELUCTANCE AND PM BRUSHLESS DC MOTOR DRIVE CONTROL FOR ELECTRIC VEHICLE APPLICATION
First Claim
1. A method of operating an electrical machine having first and second phase windings, the method comprising:
- applying positive first current to the first phase winding while the first phase winding'"'"'s back electromotive force (emf) is positive;
applying negative second current to the first phase winding while the first phase winding'"'"'s back emf is negative; and
applying positive third current to the second phase winding while the second phase winding'"'"'s back emf is positive, wherein;
the first current is conducted through a circuit consisting of a battery, the first phase winding, and a first switch that is operating in a conductive state,the second current is conducted through a circuit consisting of a first capacitive storage element, the battery, the first phase winding, and a second switch that is operating in a conductive state, andthe third current is conducted through a circuit consisting of the battery, the second phase winding, and a third switch that is operating in a conductive state.
3 Assignments
0 Petitions
Accused Products
Abstract
A method of operating an electrical machine having first and second phase windings. The method includes: (1) applying positive first current to the first phase winding while the first phase winding'"'"'s back electromotive force (emf) is positive; (2) applying negative second current to the first phase winding while the first phase winding'"'"'s back emf is negative; and (3) applying positive third current to the second phase winding while the second phase winding'"'"'s back emf is positive. The first current is conducted through a circuit composed of a battery, the first phase winding, and a first switch. The second current is conducted through a circuit composed of a first capacitive storage element, the battery, the first phase winding, and a second switch, and the third current is conducted through a circuit composed of the battery, the second phase winding, and a third switch.
6 Citations
30 Claims
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1. A method of operating an electrical machine having first and second phase windings, the method comprising:
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applying positive first current to the first phase winding while the first phase winding'"'"'s back electromotive force (emf) is positive; applying negative second current to the first phase winding while the first phase winding'"'"'s back emf is negative; and applying positive third current to the second phase winding while the second phase winding'"'"'s back emf is positive, wherein; the first current is conducted through a circuit consisting of a battery, the first phase winding, and a first switch that is operating in a conductive state, the second current is conducted through a circuit consisting of a first capacitive storage element, the battery, the first phase winding, and a second switch that is operating in a conductive state, and the third current is conducted through a circuit consisting of the battery, the second phase winding, and a third switch that is operating in a conductive state. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method of operating an electrical machine having a stator, a rotor, and first and second phase windings, the method comprising:
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applying positive first current to the first phase winding while the rotor is within a first range of rotation with respect to the stator; applying negative second current to the first phase winding while the rotor is within a second range of rotation with respect to the stator; and applying positive third current to the second phase winding while the rotor is within a third range of rotation with respect to the stator, wherein; the first current is conducted through a circuit consisting of a battery, the first phase winding, and a first switch that is operating in a conductive state, the second current is conducted through a circuit consisting of a first capacitive storage element, the battery, the first phase winding, and a second switch that is operating in a conductive state, and the third current is conducted through a circuit consisting of the battery, the second phase winding, and a third switch that is operating in a conductive state. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. An electrical machine system comprising:
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an electrical machine having a stator, a rotor, and first and second phase windings; a processor that generates a logical-TRUE condition for;
(1) a first rotor range signal when the rotor is within a first range of rotation with respect to the stator, (2) a second rotor range signal when the rotor is within a second range of rotation with respect to the stator, and (3) a third rotor range signal when the rotor is within a third range of rotation with respect to the stator, and otherwise generates a logical-FALSE condition for the first, second, and third rotor range signals;a phase current controller that generates a logical-TRUE condition for;
(1) a first phase current signal when both a pulse width modulation (PWM) signal has a logical-TRUE condition and current conducted through the first phase winding is positive, (2) a second phase current signal when both the PWM signal has a logical-TRUE condition and current conducted through the first phase winding is negative, and (3) a third phase current signal when both the PWM signal has a logical-TRUE condition and current conducted through the second phase winding is positive, and otherwise generates a logical-FALSE condition for the first, second, and third phase current signals;logic circuitry that generates a logical-TRUE condition for;
(1) a first gate signal when both the first rotor range signal and first phase current signal have a logical-TRUE condition, (2) a second gate signal when both the second rotor range signal and second phase current signal have a logical-TRUE condition, and (3) a third gate signal when both the third rotor range signal and third phase current signal have a logical-TRUE condition, and otherwise generates a logical-FALSE condition for the first, second, and third gate signals; anda power converter that;
(1) conducts current from a first source through the first phase winding when the first gate signal has a logical-TRUE condition, (2) conducts current from a second source through the first phase winding when the second gate signal has a logical-TRUE condition, and (3) conducts current from either the first or second source through the second phase winding when the third gate signal has a logical-TRUE condition. - View Dependent Claims (26, 27, 28, 29, 30)
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Specification