21-08-2012, 10:25 AM
REGENERATIVE BRAKING SYSTEM
regenerative breaking system.pptx (Size: 3.31 MB / Downloads: 72)
Conventional braking systems convert kinetic energy into heat, usually via friction.
Regenerative braking systems reclaim and storing the kinetic energy in a reusable manner
Many modern electric drive vehicles including electric locomotives and HEVs have regenerative braking systems
Stepper Motor'
Stepper motors are special kind of heavy duty motors having 2 or 4 coils. The motors will be stepping each time when it get the pulse. As there are many coils in the motors we need to energize the coils in a specific sequence for the rotation of the motor. These motors are mostly used in heavy machines. The figure shown below consists of 4 coil stepper motor and the arrow mark will rotate when the coils are energized in the sequence.
WORKING
Firstly, we start our Motor and a belt is connected between motor and pulley.
This pulley is mounted on shaft and TIRE is arranged on this shaft.
TIRE is moving simultaneously with pulley arrangement.
When we apply brake that is mounted on stepped motor, when this brake is come in contact with the TIRE.
Results, in BRAKING of TIRE and movement of motor (stepped) and produce electricity.
This electricity can used in glowing LED’s or battery.
Benefits
WEAR OF MECHANICAL BRAKES
The use of regenerative brakes reduces wear and maintenance of mechanical brakes. It may also be possible to reduce the complexity, weight and cost of mechanical brakes. Since regenerative braking works without friction, no wearing parts are present.
REDUCED CO2 EMISSIONS
The advantages of regenerative braking are clear-cut as effectively, drivers can enjoy ‘something for nothing’. They will notice no difference to regular braking and yet enjoy better fuel economy, reduced CO2 emissions and able to save energy.
Barriers:
Insufficient braking power
The power of regenerative brakes is roughly the same as the one installed for traction. For many situations (trains running late, bad track conditions, unexpected stop signals) this is not sufficient. In this case regenerative brakes are blended with dissipative brakes or completely replaced by them.
Generally, EMUs have a better regenerative braking performance than loco-hauled trains, since more axles are powered. The higher the motor power and the more axles are powered, the more energy may be recovered
regenerative breaking system.pptx (Size: 3.31 MB / Downloads: 72)
Conventional braking systems convert kinetic energy into heat, usually via friction.
Regenerative braking systems reclaim and storing the kinetic energy in a reusable manner
Many modern electric drive vehicles including electric locomotives and HEVs have regenerative braking systems
Stepper Motor'
Stepper motors are special kind of heavy duty motors having 2 or 4 coils. The motors will be stepping each time when it get the pulse. As there are many coils in the motors we need to energize the coils in a specific sequence for the rotation of the motor. These motors are mostly used in heavy machines. The figure shown below consists of 4 coil stepper motor and the arrow mark will rotate when the coils are energized in the sequence.
WORKING
Firstly, we start our Motor and a belt is connected between motor and pulley.
This pulley is mounted on shaft and TIRE is arranged on this shaft.
TIRE is moving simultaneously with pulley arrangement.
When we apply brake that is mounted on stepped motor, when this brake is come in contact with the TIRE.
Results, in BRAKING of TIRE and movement of motor (stepped) and produce electricity.
This electricity can used in glowing LED’s or battery.
Benefits
WEAR OF MECHANICAL BRAKES
The use of regenerative brakes reduces wear and maintenance of mechanical brakes. It may also be possible to reduce the complexity, weight and cost of mechanical brakes. Since regenerative braking works without friction, no wearing parts are present.
REDUCED CO2 EMISSIONS
The advantages of regenerative braking are clear-cut as effectively, drivers can enjoy ‘something for nothing’. They will notice no difference to regular braking and yet enjoy better fuel economy, reduced CO2 emissions and able to save energy.
Barriers:
Insufficient braking power
The power of regenerative brakes is roughly the same as the one installed for traction. For many situations (trains running late, bad track conditions, unexpected stop signals) this is not sufficient. In this case regenerative brakes are blended with dissipative brakes or completely replaced by them.
Generally, EMUs have a better regenerative braking performance than loco-hauled trains, since more axles are powered. The higher the motor power and the more axles are powered, the more energy may be recovered