Riding lawn mower
AssigneeNanjing Chervon Industry Co., Ltd.
InventorsDezhong Yang, Xiubo Dai, Lei Wang, Wenqi Zhen
Life of this patent
Estimating the term…
Abstract
A riding lawn mower includes a running assembly, a power output assembly, a power supply device, a driver circuit, an operating device, and a control module. The running assembly includes running wheels and a first motor for driving the running wheels. The operating device is configured to set at least one of target torque or a target rotational speed of the first motor. The control module is configured to output a control signal to the driver circuit to make an input current or an input voltage of the first motor vary with a rotor position of the first motor and make an actual torque of the first motor reach or basically reach the target torque within a preset time.
Claims20
A lawn care vehicle, comprising:
- a rack;
- a seat disposed above the rack and configured to support an operator;
- a wheel set at least partially disposed below the rack and configured to drive the rack to move, wherein the wheel set comprises at least two driving wheels;
- a running motor configured to drive at least one of the at least two driving wheels to rotate and comprising a stator and a rotor;
- a supply device at least configured to supply a power source to the running motor;
- an operating assembly at least partially disposed above the rack and configured to be operated by the operator to set a target state of the lawn care vehicle and one of a target rotational speed or a target torque of the running motor, wherein the target state comprises one of a forward state, a stop state, or a backward state;
- a driver circuit electrically connected to the running motor and configured to distribute electric power of the supply device to multiphase windings on the stator in a preset logical relationship so that the running motor is capable of generating continuous torque;
- a first detection device configured to detect an actual measured rotational speed of the at least one of the at least two driving wheels or the running motor in real time;
- a current detection module configured to detect three-phase currents of the running motor;
- and
- a control module configured to:
- receive the actual measured rotational speed sent by the first detection device and the target rotational speed set by the operating assembly;
- and
- based on the actual measured rotational speed of the at least one of the at least two driving wheels sent by the first detection device at a first preset time interval, one of the target rotational speed or the target torque set by the operating assembly, and a rotor position of the running motor, perform dynamic adjustment on currents applied to the multiphase windings to make the driver motor reach or basically reach the target torque set by the operating assembly within a preset time.
A riding lawn mower, comprising:
- a rack;
- a seat disposed above the rack and configured to support an operator;
- a wheel set at least partially disposed below the rack and configured to drive the rack to move, wherein the wheel set comprises at least two driving wheels;
- a running motor configured to drive at least one of the at least two driving wheels to rotate and comprising a stator and a rotor;
- a power supply device at least configured to supply electric power to the running motor;
- a driver circuit configured to load the electric power of the power supply device to the running motor;
- an operating device configured to set at least one of target torque or a target rotational speed of the running motor;
- and
- a control module configured to output a control signal to the driver circuit to make an input current or an input voltage of the running motor vary with a rotor position of the running motor and make an actual torque of the running motor reach or basically reach the target torque within a preset time.
Dependencies are inferred from the claim text.