5
BLADE STOPPING SYSTEMS
Blade Stopping Systems
Battery Mower Systems
There are two blade stopping systems in use on the
various battery and electric powered mowers — one for
the 120 vac models and the other for the battery
powered models. Both systems are designed to stop
the blade within three seconds of the operator
releasing the bail on the handle.
The battery powered models use a permanent magnet
motor. If you turn the armature of a permanent magnet
motor by hand, the motor becomes a generator. We
use that electricity to stop the motor. With the motor
running normally, the operator releases the handle.
The switch disconnects the battery from the motor then
connects the two wires from the motor together
120
Volt Blade Stopping System
(shorting them together). By doing this, the electricity
the motor then generates is directed back into the
motor in the opposite direction. This results in slowing
the motor. Also, as the motor slows down, it generates
less electricity. Soon the two forces balance each
other out and the motor stops. This system is very
effective and does not require brake parts to achieve
the required stopping time. See “Switch Testing” on
page 4 - 8 for the internal workings of the switch.
The 120 vac mowers use a spring loaded brake
applied to a brake drum. When the control bail on the
handle is squeezed, this brake is retracted by a means
of a cable (Figure 51).
Figure 51
0663-014
Carefree Mower Service Manual
5 - 1
| Categories | Lawn Mower Manual, Lawn-Boy Lawn Mower Manuals, Toro Lawn Mower Manual |
|---|---|
| Download File |
|
| Language | English |
| Product Brand | Toro. Customer Service Representatives are available by phone:
Monday - Friday 7:30 a.m. to 9:00 p.m. (CDT) - Saturday 8:00 a.m. to 8:00 p.m. (CDT) - Sunday 10:00 a.m. to 8:00 p.m. (CDT)
Canada 1-888-225-4886 USA 1-888-384-9939, Lawn Mower |
| Document File Type | |
| Publisher | toro.com |
| Wikipedia's Page | Toro Company |
| Copyright | Attribution Non-commercial |
(0 votes, average: 0 out of 5)