Motor control device
First Claim
1. A motor control device comprising rectifying devices and switching devices for three phases, which are connected between a DC power source and armature coils of an AC motor operatively coupled to an internal combustion engine, said motor control device having the inverter function of converting a DC power from said DC power source into an AC power and supplying the AC power to said armature coils, and the converter function of converting an AC power generated by said AC motor into a DC power and supplying the DC power to said DC power source, wherein rectangular-wave driving control of applying rectangular wave voltages to said armature coils of said AC motor is performed when said AC motor is operated for power running, and synchronous rectification control for making synchronous rectification of the AC power generated by said AC motor is performed when said AC motor is operated for electricity generation.
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Accused Products
Abstract
The invention is intended to provide a control device for a vehicular AC motor, which has higher efficiency of voltage utilization in a power running mode and has higher efficiency of electricity generation in an electricity generation mode. The motor control device comprises rectifying devices and switching devices for three phases, which are connected between a DC power source and armature coils of an AC motor operatively coupled to an internal combustion engine. The motor control device has the inverter function of converting a DC power from the DC power source into an AC power and supplying the AC power to the armature coils, and the converter function of converting an AC power generated by the AC motor into a DC power and supplying the DC power to the DC power source. Rectangular-wave driving control of applying rectangular wave voltages to the armature coils of the AC motor is performed when the AC motor is operated for power running, and synchronous rectification control for making synchronous rectification of the AC power generated by the AC motor is performed when the AC motor is operated for electricity generation.
42 Citations
18 Claims
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1. A motor control device comprising rectifying devices and switching devices for three phases, which are connected between a DC power source and armature coils of an AC motor operatively coupled to an internal combustion engine,
said motor control device having the inverter function of converting a DC power from said DC power source into an AC power and supplying the AC power to said armature coils, and the converter function of converting an AC power generated by said AC motor into a DC power and supplying the DC power to said DC power source, wherein rectangular-wave driving control of applying rectangular wave voltages to said armature coils of said AC motor is performed when said AC motor is operated for power running, and synchronous rectification control for making synchronous rectification of the AC power generated by said AC motor is performed when said AC motor is operated for electricity generation.
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12. A motor control device for performing power running control and electricity generation control on an AC motor connected to an internal combustion engine, said motor control device comprising:
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a power module including rectifying devices and switching devices, and having the inverter function of converting a direct current into an alternating current and the converter function of converting an alternating current into a direct current;
a power-running/electricity-generation changing-over unit for changing over the power running control and the electricity generation control to be performed on said AC motor; and
a power running control unit for performing the power running control on said AC motor when the power running control is selected by said power-running/electricity-generation changing-over unit, said power running control unit comprising;
a magnetic pole position detecting unit for detecting a magnetic pole position or an electrical angle of said AC motor;
a speed computing unit for computing a rotation speed ω
of said AC motor;
an interlinkage magnetic-flux amount computing unit for computing an amount of magnetic flux φ
interlinking with armature coils of a stator of said AC motor;
a voltage vector phase computing unit for computing a phase θ
v of a voltage vector V applied to the armature coil of the stator of said AC motor; and
a pulse generating unit for generating a switching signal applied to the switching device of said power module, thereby performing rectangular-wave driving control on said AC motor in a power running mode.
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13. A motor control device for performing power running control and electricity generation control on an AC motor connected to an internal combustion engine, said motor control device comprising:
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a power module including rectifying devices and switching devices, and having the inverter function of converting a direct current into an alternating current and the converter function of converting an alternating current into a direct current;
a power-running/electricity-generation changing-over unit for changing over the power running control and the electricity generation control to be performed on said AC motor; and
an electricity generation control unit for performing the electricity generation control on said AC motor when the electricity generation control is selected by said power-running/electricity-generation changing-over unit, said electricity generation control unit comprising;
a magnetic pole position detecting unit for detecting a magnetic pole position or an electrical angle of said AC motor;
a speed computing unit for computing a rotation speed ω
of said AC motor;
an interlinkage magnetic-flux amount computing unit for computing an amount of magnetic flux φ
interlinking with armature coils of a stator of said AC motor;
an induced voltage computing unit for computing induced voltages Vue, Vve and Vwe of respective phases in the armature coils of said rotor of said AC motor;
a DC voltage detecting unit for detecting a voltage VB of a DC power source connected to said power module;
a voltage comparing unit for comparing inter-line values of the induced voltages Vue, Vve and Vwe with the voltage VB of said DC power source;
a pulse cycle computing unit for computing a pulse cycle of a switching signal applied to the switching device of said power module based on a result of the comparison made by said voltage comparing unit; and
a pulse generating unit for generating the switching signal applied to the switching device of said power module based on the pulse cycle computed by said pulse cycle computing unit, thereby performing synchronous rectification control on said AC motor in an electricity generation mode. - View Dependent Claims (14)
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15. A motor control device comprising:
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upper arm driving means for receiving a power-running or rectification mode command, selecting an upper-arm power running drive signal or an upper-arm rectification drive signal in response to the power-running or rectification mode command, and outputting the upper-arm power running drive signal or the upper-arm rectification drive signal to a control terminal of an upper-arm switching device;
lower arm driving means for receiving a power-running or rectification mode command, selecting a lower-arm power running drive signal or a lower-arm rectification drive signal in response to the power-running or rectification mode command, and outputting the lower-arm power running drive signal or the lower-arm rectification drive signal to a control terminal of a lower-arm switching device;
phase-correction drive signal distributing means for receiving a magnetic pole position detected signal from an AC motor, advancing a phase of the magnetic pole position detected signal depending on a rotation speed of said AC motor, and distributing the magnetic pole position detected signal having the advanced phase as the upper-arm power running drive signal and the lower-arm power running drive signal, the upper-arm power running drive signal being outputted to said upper arm driving means and the lower-arm power running drive signal being outputted to said lower arm driving means;
upper-arm rectification detecting means for comparing the magnitude of a potential at a higher potential terminal for a main power source with the magnitude of a potential at an output terminal, and outputting the upper-arm rectification drive signal to said upper arm driving means when the magnitude of the potential at the output terminal is larger; and
lower-arm rectification detecting means for comparing the magnitude of the potential at the output terminal with the magnitude of a potential at a lower potential terminal for said main power source, and outputting the lower-arm rectification drive signal to said lower arm driving means when the magnitude of the potential at the output terminal is smaller. - View Dependent Claims (16, 17, 18)
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Specification