Torque computation unit for vehicle generator
AssigneeDenso Corporation
InventorMakoto Taniguchi
Life of this patent
Estimating the term…
Abstract
A torque computation unit of a vehicle generator includes a rotor, an armature winding, a field coil and a field current switching element. The torque computation unit includes a field current detecting circuit, an output current detecting circuit and a rotation speed detecting circuit, a torque calculation circuit for calculating driving torque of the generator from the field current, the output current and the rotation speed.
Claims8
A torque computation unit of a vehicle generator that includes a rotor, an armature winding, a field coil and a field current switching element, the torque computation unit comprising:
- field current detecting means for detecting a field current value relating to current supplied to the field coil;
- output current detecting means for detecting an output current value relating to output current of the armature winding;
- rotation speed detecting means for detecting a rotation speed of the rotor;
- and
- torque calculation means for calculating driving torque of the generator from the field current value, the output current value and the rotation speed,
- wherein said field current detecting means calculates the field current value from voltage applied to the field coil and an on-off ratio of the field current switching element.
A torque computation unit of a vehicle generator that includes a rotor, an armature winding, a field coil and a field current switching element, the torque computation unit comprising:
- field current detecting means for detecting a field current value relating to current supplied to the field coil;
- output current detecting means for detecting an output current value relating to output current of the armature winding;
- rotation speed detecting means for detecting a rotation speed of the rotor;
- torque calculation means for calculating driving torque of the generator from the field current value, the output current value and the rotation speed;
- and
- a solenoid disposed around an end of the armature winding,
- wherein said output current detecting means calculates the output current value from voltage applied to the solenoid.
A torque computation unit of a vehicle generator that includes a rotor, an armature winding, a field coil and a field current switching element, the torque computation unit comprising:
- field current detecting means for detecting a field current value relating to current supplied to the field coil;
- output current detecting means for detecting an output current value relating to output current of the armature winding;
- rotation speed detecting means for detecting a rotation speed of the rotor;
- torque calculation means for calculating driving torque of the generator from the field current value, the output current value and the rotation speed;
- and
- a C-shaped magnetic core having a slit and a magnetic sensor inserted in the slit, wherein said output current detecting means calculates the output current value from an output signal of said magnetic sensor.
A torque computation unit of a vehicle generator that includes a rotor, an armature winding, a field coil and a field current switching element, the torque computation unit comprising:
- field current detecting means for detecting a field current value relating to current supplied to the field coil;
- output current detecting means for detecting an output current value relating to output current of the armature winding;
- rotation speed detecting means for detecting a rotation speed of the rotor;
- torque calculation means for calculating driving torque of the generator from the field current value, the output current value and the rotation speed;
- a memory which stores data of moment of inertia of the rotor;
- and
- means for calculating an acceleration velocity of the rotation speed from voltage induced in the armature winding,
- wherein said torque calculation means calculates inertial torque of the generator from the acceleration velocity and the moment of inertia of the rotor.
A torque computation unit of a vehicle generator that includes a rotor, an armature winding, a field coil and a field current switching element, the torque computation unit comprising:
- field current detecting means for detecting a field current value relating to current supplied to the field coil;
- output current detecting means for detecting an output current value relating to output current of the armature winding;
- rotation speed detecting means for detecting a rotation speed of the rotor;
- torque calculation means for calculating driving torque of the generator from the field current value, the output current value and the rotation speed,
- wherein said field current detecting means further comprises means for detecting temperature of the field coil, and
- wherein said field current detecting means calculates the field current value from voltage applied to the field coil, an on-off ratio of the field current switching element and the temperature of the field coil.
A torque computation unit of a vehicle generator that includes a rotor, an armature winding, a field coil and a field current switching element, the torque computation unit comprising:
- field current detecting means for detecting a field current value Ir;
- output current detecting means for detecting an output current value Io of the armature winding;
- rotation speed detecting means for detecting a rotation speed N of the rotor;
- and
- torque calculation means for calculating driving torque T of the generator from the field current value Ir, the output current value Io, and the rotation speed N from the following equation:
- T=(k1·Ir2+M·Ir·Io+k2·Io2)/N,
- wherein k1 is a constant relating to a self-inductance of said field coil, M is a constant relating to a mutual inductance between said field coil and said armature winding and k2 is a constant relating to a self-inductance of said armature.
Dependencies are inferred from the claim text.