Motor driving control apparatus and electrically assisted vehicle
AssigneeTaiyo Yuden Co., Ltd.
InventorsYasuo Hosaka, Satoru Shimizu
Life of this patent
Estimating the term…
Abstract
A motor driving control apparatus in the embodiment includes: a first controller configured to control powering and regeneration of a motor; a second controller configured to control the first controller; and assistant circuitry configured to activate the second controller in a stop state, when a counter electromotive force caused by the motor, which is rotated without control by the first controller, satisfies a predetermined condition, before a power-on instruction for the motor driving control apparatus is made or in a state where the power-on instruction for the motor driving control apparatus is not made.
Claims15
A motor driving control apparatus configured to be installed on a vehicle that has a motor and a battery pack that includes a rechargeable battery, for controlling driving and regenerative braking of the motor with the battery pack, comprising:
- a bridge circuit having a plurality of switches to be connected to the motor;
- a first controller controlling turning ON and OFF of the plurality of switches so as to control driving and regenerative braking of the motor when the motor driving control apparatus is installed on the vehicle;
- a second controller configured to communicate with one or more sensors on the vehicle detecting a driving status of the motor so as to control the first controller in accordance with the driving status when the motor driving control apparatus is installed on the vehicle;
- assistant circuitry configured to, when the motor driving control apparatus is installed on the vehicle, cause the second controller to be powered when a counter electromotive force that is greater than a prescribed level is generated at the motor while neither of the first controller nor the second controller have yet been powered on,
- wherein when the counter electromotive force that is greater than the prescribed level is generated at the motor while neither of the first controller nor the second controller have yet been powered on, the assistant circuitry causes the second controller to be powered by an electrical power from the battery, or causes the second controller to be powered by an electrical power from the counter electromotive force that is generated at the motor without driving the plurality of switches.
An electrically assisted vehicle, comprising:
- one or more wheels;
- a motor driving at least one of the one or more wheels;
- a battery pack including a rechargeable battery;
- a motor driving control apparatus for controlling driving and regenerative braking of the motor with the battery pack, the motor driving control apparatus comprising:
- a bridge circuit having a plurality of switches to be connected to the motor;
- a first controller controlling turning ON and OFF of the plurality of switches so as to control driving and regenerative braking of the motor;
- a second controller configured to communicate with one or more sensors detecting a driving status of the motor so as to control the first controller in accordance with the driving status;
- and
- assistant circuitry configured to cause the second controller to be powered when a counter electromotive force that is greater than a prescribed level is generated at the motor while neither of the first controller nor the second controller have yet been powered on,
- wherein when the counter electromotive force that is greater than the prescribed level is generated at the motor while neither of the first controller nor the second controller have yet been powered on, the assistant circuitry causes the second controller to be powered by an electrical power from the battery, or causes the second controller to be powered by an electrical power from the counter electromotive force that is generated at the motor without driving the plurality of switches.
Dependencies are inferred from the claim text.