| CPC B60G 17/0157 (2013.01) [B60G 17/0165 (2013.01); B60G 2202/42 (2013.01)] | 5 Claims |
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1. An electric suspension apparatus comprising:
an electromagnetic actuator arranged between a wheel and a vehicle body, the electromagnetic actuator including an electric motor;
a controller including an information acquisition part, a driving force calculation part, and a drive controller; and
a power supply, wherein
the controller is configured to:
acquire, as the information acquisition part, information on a stroke speed of the electromagnetic actuator;
output, as the driving force calculation part, a driving force command value concerning the electric motor, the driving force command value being based on the stroke speed; and
control, as the drive controller, driving of the electric motor based on the driving force command value,
the power supply is configured to output a first voltage to the drive controller,
the drive controller includes:
power storage configured to be chargeable by the power supply;
a drive circuit configured to modulate a second voltage based on the driving force command value and apply the modulated second voltage to the electric motor, the second voltage being a terminal voltage of the power storage;
a return prevention circuit configured to operate in one of operation modes, the operation modes including a return prevention mode of preventing a current from flowing from the power storage to the power supply and a return allowance mode of allowing a current to flow from the power storage to the power supply; and
a discharge controller, and
the discharge controller is configured to:
determine whether the electric motor is in regenerative operation;
set the return prevention circuit to operate in the return prevention mode in response to determining that the electric motor is in regenerative operation; and
set the return prevention circuit to operate in the return allowance mode in response to determining that the electric motor is not in regenerative operation.
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