Hand-held power tool having an electronically commutated electric motor and an integrated electronics system
A hand-held power tool, in particular an angle grinder, having a drive unit, has an electronically commutated electric motor and has an electronics system which is integrated in an appliance housing. The ratio of a weight of the hand-held power tool M HWZM to a nominal power P N is selected in such a way that, in a power range of from 0 to 1200 W, the ratio of the weight of the hand-held power tool M HWXM to the nominal power P N is at most 0.75 g/W*P N +1200 g, and, at a value of the nominal power of greater than 1200 W, the ratio of the weight of the hand-held power tool to the nominal power is at most 2.2*P N −540 g.
1. A hand-held power tool having a drive unit, comprising:
an electronically commutated electric motor; and
an electronics system integrated in an appliance housing, wherein:
a ratio of a weight of the hand-held power tool to a nominal power P N is selected such that:
when the nominal power has a value in a range of 0 to 1200 W, the ratio of the weight of the hand-held power tool to the nominal power P N is maximally 0.75 g/W * P N +1200 g, and
when the nominal power has a value greater than 1200 W, the ratio of the weight of the hand-held power tool to the nominal power P N is maximally 2.2*P N −540 g.
2. The hand-held power tool as claimed in claim 1 , wherein, when the nominal power has a value in a range of 0 to 600 W, a ratio of a weight of the electronically commutated electric motor to the nominal power P N is less than 0.8 g/W.
3. The hand-held power tool as claimed in claim 1 , wherein, when the nominal power has a value greater than 600 W, a ratio of a weight of the electronically commutated electric motor to the nominal power P N is less than 0.3 g/W*P N +300 g.
4. The hand-held power tool as claimed in claim 1 , wherein a ratio of a volume of the electronics system to a volume of the electronically commutated electric motor is greater than or equal to 0.7 and less than or equal to 1.6.
5. The hand-held power tool as claimed in claim 1 , wherein a ratio of a volume of the electronically commutated electric motor to the nominal power is less than or equal to 100 mm 3 /W.
6. The hand-held power tool as claimed in claim 4 , wherein the volume of the electronically commutated electric motor represents a volume of an envelope body that encloses a rotor and a stator.
7. The hand-held power tool as claimed in claim 1 , wherein a value of an efficiency is between 65% and 97%.
8. The hand-held power tool as claimed in claim 1 , wherein a cooling capacity P K is a fraction of the nominal power P N , such that P K =k*P N , wherein k is less than 0.1.
9. The hand-held power tool as claimed in claim 1 , wherein, when the nominal power has a value in a range of 0 to 1000 W, a ratio of a diameter of an abrasive disk d Disk to the nominal power P N is less than or equal to 0.09 mm/W*P N +55 mm.
10. The hand-held power tool as claimed in claim 9 , wherein a diameter of the electronically commutated electric motor is less than or equal to 0.27*d Disk +10.
11. The hand-held power tool as claimed in claim 9 , wherein a diameter of the electronically commutated electric motor is less than or equal to 0.37*d Disk +5.
12. The hand-held power tool as claimed in claim 9 , wherein a volume of the electronically commutated electric motor less than or equal to 0.014*d Disk 3 +7500.
13. The hand-held power tool as claimed in claim 9 , wherein a volume of the electronically commutated electric motor is less than or equal to 0.019*d Disk 3 +18000.
14. The hand-held power tool as claimed in claim 9 , wherein, when the nominal power has a value greater than 1000 W, the ratio of the diameter of the abrasive disk to the nominal power P N is less than or equal to 0.2 mm/W*P N −60 mm.
15. The hand-held power tool as claimed in claim 1 , wherein a diameter of a handle is greater than or equal to 0.125 mm/W*P N +25 mm.
16. The hand-held power tool as claimed in claim 15 , wherein the diameter of the handle is less than or equal to 0.0215 mm/W*P N +50 mm.
17. The hand-held power tool as claimed in claim 1 , wherein the electronically commutated electric motor is a brushless motor.
18. The hand-held power tool as claimed in claim 1 , further comprising a mains power connection line.
19. The hand-held power tool as claimed in claim 1 , wherein the appliance housing has a shape other than a cylinder.
20. The hand-held power tool as claimed in claim 1 , wherein the hand-held power tool is an angle grinder.