SU253902A1 - METHOD OF BRAKING THREE-PHASE SHORT-CLOSED MOTOR - Google Patents
METHOD OF BRAKING THREE-PHASE SHORT-CLOSED MOTORInfo
- Publication number
- SU253902A1 SU253902A1 SU1188451A SU1188451A SU253902A1 SU 253902 A1 SU253902 A1 SU 253902A1 SU 1188451 A SU1188451 A SU 1188451A SU 1188451 A SU1188451 A SU 1188451A SU 253902 A1 SU253902 A1 SU 253902A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- braking
- phase short
- closed motor
- windings
- phase
- Prior art date
Links
- 238000000034 method Methods 0.000 title description 6
- 238000004804 winding Methods 0.000 description 10
- 230000001131 transforming effect Effects 0.000 description 1
Description
Известен способ торможени трехфазного короткозамкнутого двигател , фазные обмотки которого соединены в звезду, путем замыкани первой и второй обмоток через вентиль и подключени первой обмотки через дополнительное сопротивление к одной фазе сети.A known method of braking a three-phase short-circuited motor, the phase windings of which are connected in a star, by closing the first and second windings through a valve and connecting the first winding through an additional resistance to one phase of the network.
По предлагаемому способу с целью увеличени интенсивности торможени вторую и третью обмотки двигател включают параллельно и подсоедин ют к другой фазе сети.In the proposed method, in order to increase the intensity of braking, the second and third motor windings are connected in parallel and connected to another phase of the network.
На чертеже приведена электрическа схема устройства по предлагаемому способу.The drawing shows the electrical circuit of the device according to the proposed method.
При отключении рабочего контактора / включаетс тормозной контактор 2. Торможение двигател происходит в результате закорачивани соединенных звездой трех фаз обмоток статора 3 двигател в течение одной половины каждого периода напр лсени сети. В полупериод, когда происходит закорачивание обмоток, через вентиль 4 и сопротивление 5 в сеть поступает ток обратного (по сравнению с предыдущим полупериодом) направлени , а в обмотках двигател через тот же вентиль 4 продолжает течь ток прежнего направлени , обусловленный не только индуктивностью статора, но и электродвижущей силой, наведенной магнитным полем ротора. ПриWhen the working contactor is turned off / the brake contactor 2 is turned on. The engine is braked by shorting the star-connected three phases of the stator windings 3 of the engine during one half of each period of the power line. In the half-cycle, when the windings are short-circuited, the return current (compared to the previous half-period) through the gate 4 and the resistance 5 enters the network (compared to the previous half-period), and the current of the previous direction continues to flow through the same gate 4, due not only and the electromotive force induced by the rotor magnetic field. With
этом часть энергии ротора передаетс в статор , где она, превраща сь в тепловую, поддерживает интенсивный процесс торможени без дополнительного потреблени энергии посто нного тока из сети.This part of the rotor energy is transferred to the stator, where it, transforming into heat, supports an intensive process of braking without additional consumption of direct current energy from the network.
Предложение может быть использовано в станкостроении.The offer can be used in the machine tool industry.
Предмет изобретени Subject invention
Способ торможени трехфазного короткоза .мкнутого двигател , фазные облготки которого соедннены в звезду, путем замыкани первой и второй обмоток через вентиль н иодключени первой обмотки через дополнительное сопротивление к одной фазе сети, отлачпющийс тем, что, с целью увеличени интенсивности торможени , вторую и третью обмотки включают параллельно и подсоедин ют к другой фазе сети.A three-phase short-circuit braking method of a closed motor whose phase coils are connected to a star by closing the first and second windings through the first winding valve and connecting the first and the second winding through the additional resistance so that, in order to increase the braking intensity, the second and third windings connected in parallel and connected to another phase of the network.
«5"five
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU253902A1 true SU253902A1 (en) |
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