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US 9,263,975 B2Granted
Motor control system and control system for electric motor-driven vehicle
AssigneeKanzaki Kokyukoki Mfg. Co., Ltd.
InventorsHongkun Wang, Kazunari Koga, Shigeaki Nakagawa, Fumitoshi Ishino, William J. Cass
Life of this patent
Estimating the term…
Abstract
A motor control system includes a drive motor and a deck motor that are connected to a battery, an ECU, and a key switch. The key switch acquires that an operation unit has been turned on, and transmits a restart permission signal to the ECU. When SOC of the battery reaches or falls below a first threshold set in advance, the ECU performs a step of disabling all the motors, and when the restart permission signal is received, the ECU performs a step of executing a decelerated travelling mode where the disabled state of the drive motor is released and an allowed speed of the drive motor is reduced.
Claims14
A motor control system comprising:
- a drive motor and an auxiliary motor connected to an electric power storage unit;
- a controller for controlling the drive motor and the auxiliary motor;
- and
- a restart permission section for acquiring that an operation unit is operated by a user, and for transmitting a restart permission signal to the controller,
- wherein the controller includes
- a charge calculation unit for calculating an amount of charge of the electric power storage unit, and
- a low charge processing unit for performing a step of disabling the auxiliary motor and the drive motor when the amount of charge of the electric power storage unit reaches or falls below a first threshold set in advance, and a step of causing a decelerated travelling mode to be executed where, when the restart permission signal is received, a disabled state of the drive motor is released while maintaining a disabled state of the auxiliary motor, and an allowed speed of the drive motor is reduced to a predetermined proportion with respect to a normally allowed speed.
4 more elements
A motor control system comprising:
- a drive motor and an auxiliary motor connected to an electric power storage unit;
- and
- a controller for controlling the drive motor and the auxiliary motor,
- wherein the controller includes
- a charge calculation unit for calculating an amount of charge of the electric power storage unit, and
- a low charge processing unit for performing a step of disabling the auxiliary motor when the amount of charge of the electric power storage unit reaches or falls below a first threshold set in advance, and a step of causing a decelerated travelling mode to be executed where an allowed speed of the drive motor is reduced to a predetermined proportion with respect to a normally allowed speed when the amount of charge of the electric power storage unit reaches or falls below a second threshold lower than the first threshold after the auxiliary motor has been disabled.
3 more elements
A motor control system comprising:
- a drive motor and an auxiliary motor connected to an electric power storage unit;
- and
- a controller for controlling the drive motor and the auxiliary motor,
- wherein the controller includes
- a charge calculation unit for calculating an amount of charge of the electric power storage unit, and
- a low charge processing unit for performing a step of disabling the auxiliary motor when the amount of charge of the electric power storage unit reaches or falls below a first threshold set in advance, and a step of disabling the drive motor when the amount of charge of the electric power storage unit reaches or falls below a second threshold lower than the first threshold after the auxiliary motor has been disabled.
3 more elements
A motor control system comprising:
- a drive motor and an auxiliary motor that are each an electric motor;
- a controller to which signals indicating driving states are to be input from the drive motor and the auxiliary motor, the controller being for controlling the drive motor and the auxiliary motor;
- a manual switch to be turned on or off according to a manual operation of a user, and for outputting a signal indicating ON or OFF to the controller;
- and
- a controller electric power supply switching unit for supplying electric power from an electric power storage unit to the controller in a case where an ON instruction signal is input from the controller, and for interrupting supply of electric power from the electric power storage unit to the controller in a case where the manual switch is turned off and where input of the ON instruction signal from the controller is interrupted, the controller electric power supply switching unit being connected between the electric power storage unit and the controller,
- wherein the controller maintains the ON instruction signal to the controller electric power supply switching unit while at least one of the drive motor and the auxiliary motor controlled by the controller is rotating in a case where the manual switch is turned off, and interrupts the ON instruction signal to the controller electric power supply switching unit in a case where both of the drive motor and the auxiliary motor controlled by the controller are stopped.
3 more elements
Dependencies are inferred from the claim text.