Re: [EVDL] Electric mower - small question

2021-07-27 Thread Bill Dube via EV
The dynamic braking on DC lawnmowers is accomplished by the "shorting" the motor with a length of wire, believe it or not. When you turn it off, the power switch on the handle disconnects the battery from the motor and connects a "resistor" to the motor which is simply a bundled hank of

Re: [EVDL] Electric mower - small question

2021-07-27 Thread Robert Bruninga via EV
Curious. All corded mowers I assume used AC brushed motors and hence would work just fine on DC as well. But I assume running such universal motors on DC is more efficient than running a universal brushed motor on AC. So is there an efficiency factor? If the universal AS/DC brushed motor ran

Re: [EVDL] Electric mower - small question

2021-07-27 Thread EVDL Administrator via EV
On 25 Jul 2021 at 13:12, Seth Rothenberg via EV wrote: > what would it take to replace the cord + rectifier with some number of these > 40V packs which are available at 6Ah? If memory serves, Lee Hart did something similar with small Gates Cyclon lead cells many years ago. I hope he'll chime

[EVDL] Electric mower - small question

2021-07-25 Thread Seth Rothenberg via EV
Friends, I have a quick question about figuring out the current capacity of a Consumer-marketed LiOn battery. I have been "driving" a small used B Lawn Hog mower for a number of years. A few years ago, I changed the switch in the handle, and now the rectifier needs to be replaced. While I am