Control apparatus and method of electric rotating machine for vehicle
First Claim
1. A control apparatus for controlling an electric rotating machine for vehicle comprising:
- an electric rotating machine having an armature coil and a field coil, being connected to an internal combustion engine for vehicle, and functioning as a starter motor as well as a charging generator;
an inverter for supplying an alternating current to said armature coil of said electric rotating machine;
field current control means for controlling electric current of said field coil; and
control means for controlling operation of said electric rotating machine, when said electric rotating machine functions as a charging generator, in such a manner that power is generated in an inverter generation mode in which a phase-controlled alternating current is applied from said inverter to said armature coil and a generated voltage is subject to step-up chopper control in low-speed rotation range, and that power is generated in an alternator generation mode by controlling the electric current of said field coil in high-speed rotation range;
wherein said control means establishes a hysteresis between a first rotating speed of said rotating electric machine at which said rotating electric machine is switched from said inverter generation mode to said alternator generation mode by said control means and a second rotating speed of said rotating electric machine at which said rotating electric machine is switched from said alternator generation mode to said inverter generation mode by said control means.
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Abstract
A control apparatus and method for controlling an electric rotating machine for vehicle reduces shock at the time of switching power generation mode. The control apparatus include an electric rotating machine functioning as a starter motor and a charging generator 1, an inverter comprised of switching elements 14 to 19, a field current controller 5 for controlling an electric current of a field coil 4 of the electric rotating machine 1, and a controller 24 by which power is generated in an inverter generation mode in a low-speed rotation range and in an alternator generation mode in a high-speed rotation range. A hysteresis is established between a rotating speed in switching from the inverter generation mode to the alternator generation mode and a rotating speed in switching from the alternator generation mode to the inverter generation mode under the control of the controller 24.
15 Citations
10 Claims
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1. A control apparatus for controlling an electric rotating machine for vehicle comprising:
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an electric rotating machine having an armature coil and a field coil, being connected to an internal combustion engine for vehicle, and functioning as a starter motor as well as a charging generator; an inverter for supplying an alternating current to said armature coil of said electric rotating machine; field current control means for controlling electric current of said field coil; and control means for controlling operation of said electric rotating machine, when said electric rotating machine functions as a charging generator, in such a manner that power is generated in an inverter generation mode in which a phase-controlled alternating current is applied from said inverter to said armature coil and a generated voltage is subject to step-up chopper control in low-speed rotation range, and that power is generated in an alternator generation mode by controlling the electric current of said field coil in high-speed rotation range; wherein said control means establishes a hysteresis between a first rotating speed of said rotating electric machine at which said rotating electric machine is switched from said inverter generation mode to said alternator generation mode by said control means and a second rotating speed of said rotating electric machine at which said rotating electric machine is switched from said alternator generation mode to said inverter generation mode by said control means. - View Dependent Claims (2, 3, 4, 5, 9, 10)
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6. A control method for controlling an electric rotating machine for vehicle, in which when an electric rotating machine, which is connected to the internal combustion engine for vehicle to function as a starter motor as well as a charging generator, acts as a charging generator, power is generated in an inverter generation mode in which phase-controlled alternating current is applied by an inverter to an armature coil of said electric rotating machine and generated voltage is subject to step-up chopper control in a low-speed rotation range, and power is generated in an alternator generation mode in which electric current of a field coil of said electric rotating machine is controlled in a high-speed rotation range;
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the control method comprising; switching the power generation mode from said inverter generation mode to said alternator generation mode at a first predetermined rotating speed when the rotating speed is increased; and switching the power generation mode from said alternator generation mode to said inverter generation mode at a second predetermined rotating speed when the rotating speed is reduced;
whereby a difference is established between said first predetermined rotating speed and said second predetermined rotating speed. - View Dependent Claims (7, 8)
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Specification