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"Gear" is no doubt 9-th position of controller (power group switcher, not driver's controller, by which it is being controlled)
But WHAT "could be used", and WHY only "already from the 9-th"? What is before 9-th. AC locomotives don't need starting rheostats, as they can vary voltage directly, so it's not 9 rheistatic positions, most likely.
Faking a Voltmeter in a Cab View
Is it possible to show variation in line voltage?
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#21
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Posted 02 November 2022 - 09:38 AM
#22
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Posted 02 November 2022 - 09:57 AM
The shunt switch, which short-circuited the excitation coils of the stator, can be used from the 9th gear. Due to the short circuit, more current flowed through the remaining coils and this gave the power.
The motor speed was determined by the voltage applied to the rotating part. This can be increased in 50 volt increments.
The motor speed was determined by the voltage applied to the rotating part. This can be increased in 50 volt increments.
#23
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Posted 02 November 2022 - 10:05 AM
Thanks.
So, instead of shunting through 2 to 5 -sectioned resistors, on Sili, stator coils are sectioned, so some sections are being shunted for field weakening?
Clever solution in sense, no heat loss, but harder to construct and less reliable, as more complex, IMHO.
On C-Z locomotives, as well, field weakening "positions" are allowed only on three "running" positions of 40+ available. The rest are "transitive" and not for long-time usage.
With DC locomotives, naturally field weakening is only available while on rheostat-less positions (i.e. full-series, clear parallel-series and full-parallel)
So, instead of shunting through 2 to 5 -sectioned resistors, on Sili, stator coils are sectioned, so some sections are being shunted for field weakening?
Clever solution in sense, no heat loss, but harder to construct and less reliable, as more complex, IMHO.
On C-Z locomotives, as well, field weakening "positions" are allowed only on three "running" positions of 40+ available. The rest are "transitive" and not for long-time usage.
With DC locomotives, naturally field weakening is only available while on rheostat-less positions (i.e. full-series, clear parallel-series and full-parallel)