Methods of controlling a lawn mower having electric drive and blade motors
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
A01D-069/00
A01D-034/78
출원번호
US-0657308
(2012-10-22)
등록번호
US-8966870
(2015-03-03)
발명자
/ 주소
MacKinnon, Stuart Craig
Lankin, Robert Gordon
Wiseman, Jason Cornelius
Derbecker, Christopher Keith
출원인 / 주소
Accelerated Systems Inc.
대리인 / 주소
Bereskin & Parr LLP/S.E.N.C.R.L., s.r.l.
인용정보
피인용 횟수 :
0인용 특허 :
69
초록▼
A vehicle such as a riding lawn mower may have at least one electric drive motor configured to drive at least one wheel, at least one electric blade motor configured to drive at least one cutting blade, and a battery module connected to the drive and blade motors. According to some embodiments, a me
A vehicle such as a riding lawn mower may have at least one electric drive motor configured to drive at least one wheel, at least one electric blade motor configured to drive at least one cutting blade, and a battery module connected to the drive and blade motors. According to some embodiments, a method of controlling the vehicle may include: operating the blade motor according to a blade target speed; monitoring a blade current load for the blade motor; comparing the blade current load to a light load low threshold for the blade motor; and if the blade current load is less than the light load low threshold, decreasing the blade target speed.
대표청구항▼
1. A method of controlling a lawn mower, the lawn mower having at least one electric drive motor configured to drive at least one wheel, at least one electric blade motor configured to drive at least one cutting blade, and a battery module connected to the drive and blade motors, the method comprisi
1. A method of controlling a lawn mower, the lawn mower having at least one electric drive motor configured to drive at least one wheel, at least one electric blade motor configured to drive at least one cutting blade, and a battery module connected to the drive and blade motors, the method comprising: operating the blade motor according to a blade target speed;monitoring a blade current load for the blade motor;comparing the blade current load to a light load low threshold for the blade motor; andif the blade current load is less than the light load low threshold, decreasing the blade target speed. 2. The method of claim 1, further comprising: receiving a blade speed setpoint; andsetting the blade target speed based at least partially on the blade speed setpoint. 3. The method of claim 1, further comprising: operating the drive motor according to a travel target speed;comparing the blade current load to a heavy load high threshold for the blade motor; andif the blade current load is greater than the heavy load high threshold, decreasing the travel target speed. 4. The method of claim 3, further comprising: receiving a travel speed setpoint; andsetting the travel target speed based at least partially on the travel speed setpoint. 5. The method of claim 3, further comprising: receiving a blade speed setpoint; andsetting the blade target speed based at least partially on the blade speed setpoint. 6. The method of claim 1, further comprising: operating the drive motor according to a travel target speed;comparing the blade current load to a light load high threshold and a heavy load low threshold for the blade motor; andif the blade current load is greater than the light load high threshold and less than the heavy load low threshold, increasing the travel target speed. 7. The method of claim 6, further comprising: receiving a travel speed setpoint; andsetting the travel target speed based at least partially on the travel speed setpoint. 8. The method of claim 6, further comprising: if the blade current load is greater than the light load high threshold and less than the heavy load low threshold, increasing the blade target speed. 9. The method of claim 8, further comprising: receiving a blade speed setpoint; andsetting the blade target speed based on the blade speed setpoint. 10. A lawn mower, comprising: a driving assembly comprising at least one electric drive motor and at least one wheel that is driven by the drive motor;a cutting assembly comprising at least one electric blade motor and at least one cutting blade that is driven by the blade motor;a battery module connected to the drive and blade motors; anda controller connected to the drive and blade motors, wherein the controller is configured to: operate the blade motor according to a blade target speed;monitor a blade current load for the blade motor;compare the blade current load to a light load low threshold for the blade motor; andif the blade current load is less than the light load low threshold, decrease the blade target speed. 11. The lawn mower of claim 10, wherein the controller is further configured to: receive a blade speed setpoint; andset the blade target speed based at least partially on the blade speed setpoint. 12. The lawn mower of claim 10, wherein the controller is further configured to: operate the drive motor according to a travel target speed;compare the blade current load to a heavy load high threshold for the blade motor; andif the blade current load is greater than the heavy load high threshold, decrease the travel target speed. 13. The lawn mower of claim 12, wherein the controller is further configured to: receive a travel speed setpoint; andset the travel target speed based at least partially on the travel speed setpoint. 14. The lawn mower of claim 12, wherein the controller is further configured to: receive a blade speed setpoint; andset the blade target speed based at least partially on the blade speed setpoint. 15. The lawn mower of claim 10, wherein the controller is further configured to: operate the drive motor according to a travel target speed;compare the blade current load to a light load high threshold and a heavy load low threshold for the blade motor; andif the blade current load is greater than the light load high threshold and less than the heavy load low threshold, increase the travel target speed. 16. The lawn mower of claim 15, wherein the controller is further configured to: receive a travel speed setpoint; andset the travel target speed based at least partially on the travel speed setpoint. 17. The lawn mower of claim 15, wherein the controller is further configured to: if the blade current load is greater than the light load high threshold and less than the heavy load low threshold, increase the blade target speed. 18. The lawn mower of claim 17, wherein the controller is further configured to: receive a blade speed setpoint; andset the blade target speed based on the blade speed setpoint. 19. A vehicle, comprising: a driving assembly comprising at least one electric drive motor and at least one wheel that is driven by the drive motor;an implement assembly comprising at least one electric implement motor and at least one implement that is driven by the implement motor;a battery module connected to the drive and implement motors; anda controller connected to the drive and implement motors, wherein the controller is configured to: operate the implement motor according to an implement target speed;monitor an implement current load for the implement motor;compare the implement current load to a light load low threshold for the implement motor; andif the implement current load is less than the light load low threshold, decrease the implement target speed. 20. The vehicle of claim 19, wherein the controller is further configured to: operate the drive motor according to a travel target speed;compare the implement current load to a heavy load high threshold for the implement motor; andif the implement current load is greater than the heavy load high threshold, decrease the travel target speed.
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