| 摘要 |
A suspension apparatus 1 includes an electric shock absorber 30 having a motor 40 and a ball screw mechanism 35, an electric circuit 101, an inverting amplification circuit 120, and an inertia compensation capacitor Cp. The electric circuit 101 electrically connects the two electricity supply terminals of the motor 40. The inverting amplification circuit 120 is connected to the electric circuit 101. The inertia compensation capacitor Cp is connected to the output terminal O of the inverting amplification circuit 120. As a result of approaching or separating motion between sprung and unsprung members, not only a generated current but also an inertia corresponding current Im which represents an inertial force of a rotation body, such as the ball screw shaft 36 and the rotor of the motor 40, flows through the motor 40 and the electric circuit 101. A current Ip which is antiphase to the inertia corresponding current Im flows through the inertia compensation capacitor Cp. This antiphase current Ip cancels out the inertia corresponding current Im. |
| 主权项 |
1. A suspension apparatus for a vehicle, comprising:
a shock absorber which includes a motor having a stator coupled with one of sprung and unsprung members of the vehicle and a rotor rotatable in relation to the stator, wherein, due to an inductive electromotive force generated when the rotor is rotated as a result of approaching and separating motions between the sprung and unsprung members, an induction current flows through the motor, whereby a damping force is generated; an electric circuit which establishes electrical connection between a first electricity supply terminal of the motor and a second electricity supply terminal of the motor; and an electrical characteristic adjustment part which adjusts an electrical characteristic of the electric circuit so as to reduce an inertia corresponding current which is a current flowing through the motor and which represents an inertial force of a rotation body which includes at least the rotor and which rotates as a result of the approaching and separating motions between the sprung and unsprung members, wherein the electrical characteristic adjustment part comprises: an inverting amplification circuit which includes an operational amplifier, an input resistor, and a feedback resistor, the operation amplifier having an inverting input terminal connected to the first electricity supply terminal of the motor, a non-inverting input terminal connected to the second electricity supply terminal of the motor, and an output terminal; and an inertia compensation capacitor connected to the output terminal, and wherein the input resistor is connected to the inverting input terminal, and the feedback resistor is provided between the output terminal and the inverting input terminal. |
