Method of starting an electric brushless rotating machine for driving an internal combustion engine
First Claim
1. A method of starting an electric brushless rotating machine which has a magnetic rotor and a set of first, second, and third stator windings arranged at phase intervals of 120 electric degrees to be energized in a sequence for forced commutation according to a voltage signal induced on the stator windings when the rotor is rotated, comprising the steps of:
- energizing the second stator winding and the first stator winding in this order for initial magnetization at the startup to rotate for the positioning of the rotor; and
energizing the first stator winding and the third stator winding in this order for the forced commutation.
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Accused Products
Abstract
A method of starting an electric brushless rotating machine is provided which enables the rotor to produce a large power of startup torque with no use of any rotor position detectors. At Steps S1 and S2, a first and a second initial magnetization respectively are carried out for shifting the rotor at its free pausing state by forced commutation to a desired location to start the forward rotation at the maximum torque. At Step S3, the energization at single-phase is conducted with the rotor and the stator having a positional relationship for permitting generation of the maximum torque after the forced commutation or the second the initial magnetization. An induced voltage at the not-energized phase is measured by the forced commutation and used for determining the location of the rotor. Step S4 follows where a normal action of the energization is carried out.
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Citations
5 Claims
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1. A method of starting an electric brushless rotating machine which has a magnetic rotor and a set of first, second, and third stator windings arranged at phase intervals of 120 electric degrees to be energized in a sequence for forced commutation according to a voltage signal induced on the stator windings when the rotor is rotated, comprising the steps of:
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energizing the second stator winding and the first stator winding in this order for initial magnetization at the startup to rotate for the positioning of the rotor; and
energizing the first stator winding and the third stator winding in this order for the forced commutation. - View Dependent Claims (3, 4, 5)
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2. A method of starting an electric brushless rotating machine which has a magnetic rotor and a set of first, second, and third stator windings arranged at phase intervals of 120 electric degrees to be energized in a sequence for forced commutation according to a voltage signal induced on the stator windings when the rotor is rotated, comprising the steps of:
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energizing the second stator winding and the first stator winding in this order for initial magnetization at the startup to rotate for the positioning of the rotor;
energizing the second stator winding and the third stator winding in this order to rotate for the positioning of the rotor; and
energizing the first stator winding and the third stator winding in this order for starting the forced commutation.
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Specification