US 2008/0258656 A1Published application

Control apparatus for electric vehicles

AssigneeDenso Corporation

InventorsShingo Kawasaki, Tsuneyuki Egami

Life of this patent

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Abstract

In a hybrid vehicle control apparatus, a motor control unit executes input power control on a MG unit to stabilize a system voltage. This input power control for MG unit is executed independently from torque control on an AC motor so that the input power control and the torque control are stabilized. The motor control unit further adjusts a current control gain for torque control in accordance with an input power amount of the MG unit. As a result, the current control gains of a q-axis current and a d-axis current for torque control are varied in correspondence to variations in torque variation rate in the q-axis direction and the d-axis direction in accordance with the input power amount, so that the torque is restricted from varying with variations in the q-axis current or the d-axis current.

Claims6

Dependent claims

A control apparatus for an electric vehicle comprising:

a conversion means that converts a voltage supplied by a DC power source into a system voltage appearing on a power supply line;
an MG unit that includes an inverter connected to the power supply line and drives an AC motor;
a current control means that controls a torque of the AC motor and an input electric power of the MG unit independently from each other;
a system voltage control means that executes system voltage stabilization control to control the input electric power of the MG unit so as to suppress variation in the system voltage by sending to the current control means a command value for input electric power control;
and
a current control gain adjusting means that adjusts at least one of a current control gain for torque control and a current control gain for input electric power control in accordance with a control state of the MG unit.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 12/068,595Filed 8 Feb 2008
Priority: JP 2007-10825817 Apr 2007
Published: 23 Oct 2008
Term ends: Not estimatedThe source records don’t support an estimate.

Classification19 codes

H02P 21/00
Arrangements or methods for the control of electric machines by vector control
B60K 6/445
Series-parallel type: differential gearing distribution type
B60L 3/0046
Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train: relating to electric energy…
B60L 15/025
Characterised by the form of the current used in the control circuit: using field orientation; Vector control; Direct Torque Control [DTC]